121 results on '"Yan ZF"'
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2. High-frequency corrosion fatigue behavior of AZ31 magnesium alloy in different environments
- Author
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He, XL, primary, Wei, YH, additional, Hou, LF, additional, Yan, ZF, additional, and Guo, CL, additional
- Published
- 2013
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3. Recent advances in the preparation and utilization of carbon nanotubes for hydrogen storage.
- Author
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Ding, RG, Lu, GQ, Yan, ZF, Wilson, MA, Ding, RG, Lu, GQ, Yan, ZF, and Wilson, MA
- Abstract
Recent progress in the production, purification, and experimental and theoretical investigations of carbon nanotubes for hydrogen storage are reviewed. From the industrial point of view, the chemical vapor deposition process has shown advantages over laser ablation and electric-arc-discharge methods. The ultimate goal in nanotube synthesis should be to gain control over geometrical aspects of nanotubes, such as location and orientation, and the atomic structure of nanotubes, including helicity and diameter. There is currently no effective and simple purification procedure that fulfills all requirements for processing carbon nanotubes. Purification is still the bottleneck for technical applications, especially where large amounts of material are required. Although the alkalimetal-doped carbon nanotubes showed high H2 weight uptake, further investigations indicated that some of this uptake was due to water rather than hydrogen. This discovery indicates a potential source of error in evaluation of the storage capacity of doped carbon nanotubes. Nevertheless, currently available single-wall nanotubes yield a hydrogen uptake value near 4 wt% under moderate pressure and room temperature. A further 50% increase is needed to meet U.S. Department of Energy targets for commercial exploitation. Meeting this target will require combining experimental and theoretical efforts to achieve a full understanding of the adsorption process, so that the uptake can be rationally optimized to commercially attractive levels. Large-scale production and purification of carbon nanotubes and remarkable improvement of H2 storage capacity in carbon nanotubes represent significant technological and theoretical challenges in the years to come.
- Published
- 2001
4. High-frequency corrosion fatigue behavior of AZ31 magnesium alloy in different environments.
- Author
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He, XL, Wei, YH, Hou, LF, Yan, ZF, and Guo, CL
- Subjects
MAGNESIUM alloys ,CORROSION fatigue ,NUCLEATION ,SOLUTION (Chemistry) ,CRACK initiation (Fracture mechanics) - Abstract
The high-frequency corrosion fatigue behavior of extruded AZ31 magnesium alloy was investigated in different environments: air, gear oil and 3.5% NaCl solution. Compared with that in air, the corrosion fatigue limits were degraded by approximately 3.52% and 58.91%, respectively, and the corrosion fatigue lives were shortened by about 13.43% and 89.36%, respectively. In the same environment, the high-frequency fatigue limits are all higher than those tested at low frequency. The specimen geometrical shape plays a certain factor on stage characteristics of S–N curves. Compared with that of arc transition specimens, the stress sensitivity of line transition specimens is only reflected in a relatively high cycle fatigue life region. Different environments influence the corrosion failure kinetics processes (the crack initiation mechanism), but do not change the fatigue fracture mechanism of the alloy, and the higher loading frequency only accelerate the crack nucleation processes. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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5. Experimental Study on Postoperative Adhesions between Tendon and Different Tissues
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Su, Y, Wang, WM, Meng, XJ, Gu, GS, Yu, MY, Yan, ZF, Ma, YM, Dong, XL, Sun, Q, and Zhao, DW
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- 2017
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6. Metabolic engineering of Escherichia coli for upcycling of polyethylene terephthalate waste to vanillin.
- Author
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Li Y, Zhao XM, Chen SQ, Zhang ZY, Fu QS, Chen SM, Chen S, Wu J, Xu KW, Su LQ, and Yan ZF
- Abstract
Polyethylene terephthalate (PET) waste presents a significant environmental challenge due to its durability and resistance to degradation. Innovative approaches for upcycling PET waste into high-value chemicals can mitigate these issues while contributing to a circular economy. In this study, we developed a multi-enzyme cascade system in E. coli to convert PET-derived monomer terephthalic acid (TPA) into vanillin (VAN). The metabolic engineering approach was then employed to increase VAN production, including 1) inhibition of VAN degradation by knocking out endogenous aldehyde reductases and alcohol dehydrogenases and 2) enhancement of TPA uptake by modifying membrane proteins to increase cell permeability. The engineered E. coli demonstrated a VAN production of 658.55 mg/L from 1992 mg/L of TPA with a molar conversion rate of 71.1 %, representing the highest production of VAN using TPA as the substrate. Additionally, the engineered E. coli effectively converted post-consumer PET waste into VAN under mild conditions, with the highest production of 259.2 mg/L in 20× diluted PET hydrolysates, highlighting its potential for application in PET waste upcycling. This approach not only provides an environmentally friendly alternative to traditional chemical synthesis but also offers substantial economic benefits by transforming low-value waste into high-value chemicals., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)
- Published
- 2024
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7. Synergistic bioremediation of petroleum-contaminated soil using immobilized consortium of Rhodococcus rhodochrous and Bacillus subtilis laccase.
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Yan ZF, Fei Y, Wang ZQ, Yang J, Zhou XY, Huang QS, Chen S, and Wu J
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- Soil Microbiology, Soil chemistry, Laccase metabolism, Biodegradation, Environmental, Rhodococcus metabolism, Petroleum metabolism, Bacillus subtilis, Soil Pollutants metabolism
- Abstract
Petroleum-contaminated soil represents a significant environmental and public health challenge on a global scale. Microbial bioremediation has shown potential, yet the role of enzymes in enhancing petroleum degradation remains underexplored. In this study, the synergistic effects of Rhodococcus rhodochrous (R.rh) and Bacillus subtilis-derived laccase (BsLac) was investigated in the remediation of petroleum-contaminated soil. Immobilized R.rh (PSIMRH) and BsLac (ADIMLac) exhibited higher petroleum degradation rates than their free state, achieving 78.3% and 56.3% degradation in liquid systems, respectively. The combined treatment of PSIMRH and ADIMLac demonstrated a synergistic effect on petroleum degradation, achieving 43.6% with a maximum degradation constant of 0.0335 d
-1 , representing a 202.7% improvement over untreated soil. PSIMRH enhanced petroleum degradation through microbial metabolism, while ADIMLac accelerated the initial breakdown of complex hydrocarbons into simpler, more bioavailable ones via enzymatic oxidation, providing growth substrates for microbes and significantly improving petroleum degradation rates. The microbial analysis revealed an increase abundance of known petroleum-degrading bacterial genera, including Rhodococcus, Lysobacter, Micromonospora, and Streptomyces. However, the presence of BsLac appeared to reduce the competitive advantage of Rhodococcus, promoting the proliferation of indigenous strains like Lysobacter and Streptomyces. These results suggest that enzyme-microbe synergy can enhance the bioremediation process by altering microbial community dynamics and accelerating petroleum degradation. This study attempts to remediate petroleum-contaminated pollution with the combined use of strains and enzymes, providing a new approach for the remediation of other pollution problems., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Ltd. All rights reserved.)- Published
- 2024
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8. Enhancement of the flavor and functional characteristics of cod protein isolate using an enzyme-microbe system.
- Author
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Yan ZF, Chen JY, Yang J, Yuan S, Qiao XY, Xu B, and Su LQ
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- Humans, Fermentation, Probiotics, Lactobacillus acidophilus enzymology, Fish Proteins metabolism, Fish Proteins chemistry, Animals, Bifidobacterium longum enzymology, Flavoring Agents chemistry, Flavoring Agents metabolism, Streptomyces enzymology, Male, Odorants analysis, Adult, Taste
- Abstract
Cod protein isolate (CPI), a by-product of the cod processing industry, represents a novel source of high value-added products. However, off-flavors in cod protein such as bitterness and fishy odor reduce its acceptability to consumers. Here, CPI was first debittered using aminopeptidase from Streptomyces canus ( Sc APase) and then deodorized through probiotic fermentation. This is the first reported demonstration of complete removal of the bitterness of CPI using Sc APase. Subsequently, Syn3 and Syn4, as aromatic CPI (ACPI), were prepared from debittered CPI (DCPI) via fermentation with Lactobacillus acidophilus and Bifidobacterium longum , respectively. These products, DCPI and ACPI, were characterized by the absence of bitterness and fishy odor, along with a strong aromatic scent and high overall acceptability. Additionally, these products exhibited improved physicochemical properties, including enhanced oil-holding capacity, emulsifying activity, and resistance to digestion, compared to untreated CPI. However, significant differences were observed in their radical scavenging activities. The highest scavenging activity was detected in Syn3 against DPPH˙ (63.5%) and ˙OH (79.2%), in DCPI against O
2 - (32.0%), and in post-digestion Syn4 against ABTS˙+ (95.2%). Furthermore, after digestion treatment, these products significantly promoted the proliferation of probiotics. Notably post-digestion Syn4 showed the most substantial proliferation effect on Lactobacillus reuteri , Lactobacillus rhamnosus , and Bifidobacterium breve compared to other post-digestion samples. These results indicate that the treated CPI has the potential for applications in health food products.- Published
- 2024
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9. Targeted aggregation of PETase towards surface of Stenotrophomonas pavanii for degradation of PET microplastics.
- Author
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Chen SQ, Huang QS, Li Y, Wu J, Chen S, and Yan ZF
- Abstract
Polyethylene terephthalate (PET) is one of the most widely used plastics, but its fragmentation into microplastics poses significant environmental challenges. The recycling of PET microplastics is hindered by their low solubility and widespread dispersion in the environment, making microbial in-situ degradation a promising solution. However, existing PET-degrading strains exhibited the limited effectiveness, primarily due to the diffusion of secreted hydrolases away from the PET surface. In this study, Stenotrophomonas pavanii JWG-G1 was engineered to achieve the targeted aggregation of PET hydrolase PETase on the cell surface by fusing it with an endogenous anchor protein. This approach aims to maximise the local concentration of PETase around PET, thereby increasing the overall rate of PET degradation. The PETase surface-aggregated system, S. pavanii/PaL-PETase, demonstrated the highest degradation efficiency, achieving 63.3 % degradation of low-crystallinity PET (lcPET) and 27.3 % degradation of high-crystallinity PET bottles (hcPET) at 30 °C. This represents the highest degradation rate reported for a displayed whole-cell system at ambient temperature. Furthermore, this system exhibited broad-spectrum degradation activity against various polyesters. These findings suggest that this system offers a promising, eco-friendly solution to PET and other polyester pollution, with potential implications for environmental bioremediation strategies., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)
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- 2024
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10. Enhanced degradation of polyethylene terephthalate (PET) microplastics by an engineered Stenotrophomonas pavanii in the presence of biofilm.
- Author
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Huang QS, Chen SQ, Zhao XM, Song LJ, Deng YM, Xu KW, Yan ZF, and Wu J
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- Water Pollutants, Chemical metabolism, Hydrolases metabolism, Hydrolases genetics, Polyethylene Terephthalates metabolism, Biofilms, Stenotrophomonas metabolism, Stenotrophomonas genetics, Biodegradation, Environmental, Microplastics
- Abstract
Polyethylene terephthalate (PET) microplastics pose significant environmental and human health risks due to their resistance to degradation and accumulation in ecosystems. In this study, we engineered Stenotrophomonas pavanii JWG-G1, a robust biofilm-forming bacterium, to overexpress the PET hydrolase (DuraPETase) for PET microplastics degradation at ambient temperature. Nine endogenous PET hydrolases were identified through genome sequencing of S. pavanii, and were successfully expressed in Escherichia coli BL21(DE3). Among them, hydrolase Est_B achieved 100% degradation of bis(2-hydroxyethyl) terephthalate (BHET) at an initial concentration of 0.23 mg/mL at 30 °C within 4 h, identifying it as a novel BHETase. However, the PET degradation performance of all endogenous PET hydrolases was inferior to that of DuraPETase. The engineered strain overexpressing DuraPETase demonstrated a significant enhancement in PET degradation, achieving a 38.04 μM total product release of high-crystallinity PET microplastics after 30 days at 30 °C. The degradation extent was greater than that of low biofilm-forming engineered strains, attributing to the aggregation of DuraPETase on the PET surface in the presence of biofilm. Additionally, this engineered strain also maintained PET degradation activity across various water environments and demonstrated effectiveness in degrading other polyester plastics. This is the first report demonstrating that an engineered strain of Stenotrophomonas species is capable of simultaneously secreting exogenous hydrolase and degrading polyester microplastics, representing a novel approach in the development of engineered bacteria with potential applications in bioreactor systems and environmental remediation., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024. Published by Elsevier B.V.)
- Published
- 2024
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11. Prognostic prediction model for patients with pathological T1N0 stage esophageal squamous cell carcinoma undergone esophagectomy.
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Liu Q, Li Y, Yan ZF, Luo X, Guo XG, Jian SH, Zheng YB, Zhou HN, Jiang KY, and Tian D
- Abstract
Background: There is a shortage of reliable predictive models to provide valuable prognostic information for early esophageal squamous cell carcinoma (ESCC) without lymph node metastasis (LNM). We aimed to develop and validate a nomogram using the prognostic factors in T1N0 ESCC patients., Methods: Patients with pathological T1N0 ESCC who underwent esophagectomy between 2014 and 2021 at three institutes were reviewed. The prognostic factors were evaluated by Cox proportional hazards model and a nomogram was developed. Patients were divided into high- and low-risk groups based on cut-off value of total points in the nomogram. Overall survival (OS) was estimated by the Kaplan-Meier method and compared using the log-rank test., Results: A total of 275 patients were included and split into training (n=180) and external validation (n=95) cohorts. In the training cohort, multivariable analysis showed that the surgical approach, T1 substage, and carcinoembryonic antigen (CEA) level were independent prognostic factors. The developed nomogram had relatively high performance, with the area under the receiver operating characteristic (ROC) curve (AUC) of 0.783, 0.711 and 0.612 for 1-, 3-, and 5-year OS, respectively. The calibration curves showed that the predicted probability was in good agreement with the actual probability. Forty-seven was determined as cut-off value of total points. High-risk group (n=148) showed a significant poor OS than low-risk group (n=127) (P<0.001)., Conclusions: Left surgical approach, stage T1b, and higher CEA were associated with poorer prognosis in T1N0 ESCC patients. The nomogram demonstrated a good performance to predict the individual survival., Competing Interests: Conflicts of Interest: All authors have completed the ICMJE uniform disclosure form (available at https://jtd.amegroups.com/article/view/10.21037/jtd-24-935/coif). The authors have no conflicts of interest to declare., (2024 Journal of Thoracic Disease. All rights reserved.)
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- 2024
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12. Design and construction of chemical-biological module clusters for degradation and assimilation of poly(ethylene terephthalate) waste.
- Author
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Yan ZF, Feng CQ, Chen XQ, Jin CX, Xia W, Chen S, and Wu J
- Subjects
- Carboxylic Ester Hydrolases, Polyethylene Terephthalates chemistry, Polyethylene Terephthalates metabolism, Biodegradation, Environmental, Polyesters metabolism, Polyesters chemistry
- Abstract
The rising accumulation of poly(ethylene terephthalate) (PET) waste presents an urgent ecological challenge, necessitating an efficient and economical treatment technology. Here, we developed chemical-biological module clusters that perform chemical pretreatment, enzymatic degradation, and microbial assimilation for the large-scale treatment of PET waste. This module cluster included (i) a chemical pretreatment that involves incorporating polycaprolactone (PCL) at a weight ratio of 2% (PET:PCL = 98:2) into PET via mechanical blending, which effectively reduces the crystallinity and enhances degradation; (ii) enzymatic degradation using Thermobifida fusca cutinase variant (4Mz), that achieves complete degradation of pretreated PET at 300 g/L PET, with an enzymatic loading of 1 mg protein per gram of PET; and (iii) microbial assimilation, where Rhodococcus jostii RHA1 metabolizes the degradation products, assimilating each monomer at a rate above 90%. A comparative life cycle assessment demonstrated that the carbon emissions from our module clusters (0.25 kg CO
2 -eq/kg PET) are lower than those from other established approaches. This study pioneers a closed-loop system that seamlessly incorporates pretreatment, degradation, and assimilation processes, thus mitigating the environmental impacts of PET waste and propelling the development of a circular PET economy., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Ltd. All rights reserved.)- Published
- 2024
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13. Traditional Chinese medicine for post-viral olfactory dysfunction: A systematic review.
- Author
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Zou XY, Liu XH, Lu CL, Jin XY, He BX, Liao YL, Liu T, Dai YD, Qi SH, Sheng ZJ, Yan ZF, Yang GY, Stub T, and Liu JP
- Abstract
Background: Post-viral olfactory dysfunction (PVOD) is the common symptoms of long COVID, lacking of effective treatments. Traditional Chinese medicine (TCM) is claimed to be effective in treating olfactory dysfunction, but the evidence has not yet been critically appraised. We conducted a systematic review to evaluate the effectiveness and safety of TCM for PVOD., Methods: We searched eight databases to identified clinical controlled studies about TCM for PVOD. The Cochrane risk of bias tools and GRADE were used to evaluate the quality of evidence. Risk ratio (RR), mean differences (MD), and 95 % confidence interval (CI), were used for effect estimation and RevMan 5.4.1 was used for data analysis., Results: Six randomized controlled trials (RCTs) (545 participants), two non-randomized controlled trials (non-RCTs) (112 participants), and one retrospective cohort study (30 participants) were included. The overall quality of included studies was low. Acupuncture ( n = 8) and acupoint injection ( n = 3) were the mainly used TCM therapies. Five RCTs showed a better effect in TCM group. Four trials used acupuncture, and three trials used acupoint injection. The results of two non-RCTs and one cohort study were not statistically significant. Two trials reported mild to moderate adverse events (pain and brief syncope caused by acupuncture or acupoint injection)., Conclusions: Limited evidence focus on acupuncture and acupoint injection for PVOD and suggests that acupuncture and acupoint injection may be effective in improving PVOD. More well-designed trials should focus on acupuncture to confirm the benefit., Protocol Registration: The protocol of this review was registered at PROSPERO: CRD42022366776., Competing Interests: The author JPL is senior editorial board member of the journal, but none of the authors has any conflict of interest regarding this study., (© 2024 Korea Institute of Oriental Medicine. Published by Elsevier B.V.)
- Published
- 2024
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14. Mycobacterium tuberculosis Rv1043c regulates the inflammatory response by inhibiting the phosphorylation of TAK1.
- Author
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Li W, Yan ZF, Teng TS, and Xiang XH
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- Phosphorylation, Animals, Mice, Humans, NF-kappa B metabolism, Tuberculosis microbiology, Tuberculosis immunology, Mycobacterium smegmatis genetics, Mycobacterium smegmatis metabolism, Mycobacterium smegmatis enzymology, Signal Transduction, Inflammation, Mice, Inbred C57BL, Host-Pathogen Interactions, Mycobacterium tuberculosis genetics, Mycobacterium tuberculosis enzymology, Mycobacterium tuberculosis metabolism, Mycobacterium tuberculosis immunology, MAP Kinase Kinase Kinases metabolism, MAP Kinase Kinase Kinases genetics, Macrophages microbiology, Macrophages immunology, Macrophages metabolism, Bacterial Proteins metabolism, Bacterial Proteins genetics, Cytokines metabolism
- Abstract
Mycobacterium tuberculosis can manipulate the host immunity through its effectors to ensure intracellular survival and colonization. Rv1043c has been identified as an effector potentially involved in M. tuberculosis pathogenicity. To explore the function of M. tuberculosis Rv1043c during infection, we overexpressed this protein in M. smegmatis, a non-pathogenic surrogate model in tuberculosis research. Here, we reported that Rv1043c enhanced mycobacterial survival and down-regulated the release of pro-inflammatory cytokines in macrophages and mice. In addition, Rv1043c inhibited the activation of MAPK and NF-κB signaling by preventing the phosphorylation of TAK1 indirectly. In conclusion, these data suggest that Rv1043c regulates the immune response and enhances the survival of recombinant M. smegmatis in vitro and in vivo., (© 2023. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)
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- 2024
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15. Complete degradation of PET waste using a thermophilic microbe-enzyme system.
- Author
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Yan ZF, Feng CQ, Zhou JQ, Huang QS, Chen XQ, Xia W, and Wu J
- Subjects
- Hydrolases chemistry, Hydrolysis, Escherichia coli metabolism, Polyethylene Terephthalates chemistry
- Abstract
Enzymatic degradation has been proposed as a suitable solution for addressing PET pollution, but approximately 10 % of PET is left as nonbiodegradable. Microbes can completely degrade PET at the gram level per year. Based on the complementary benefits of microbes and enzymes, a microbe-enzyme system was created to completely degrade PET. Here, a thermophilic microbe-enzyme (TME) system composed of Bacillus thermoamylovorans JQ3 and leaf-branch compost cutinase variant (ICCG) was used to demonstrate the synergistic degradation of PET, enabling 100 % degradation of PET waste at a high PET loading level (360 g/L). Six endogenous PET hydrolases of strain JQ3 were discovered by employing an ester bond hydrolysis function-first genome mining (EGM) strategy and first successfully expressed in E. coli. These hydrolases could release TPA as the final product from PET and preferentially degraded BHET instead of MHET. Of these, carboxylesterase 39_5 and ICCG could degrade PET in a synergistic manner to generate 50 μM of TPA, which was greater than the sum of the individual treatments. Finally, the degradation pathway of the TME system was speculated to include biofilm formation, PET degradation and utilization. The successful implementation of this study rendered a scale-up degradation feasible of PET at a lower cost., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)
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- 2024
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16. Design and multilevel regulation of transition metal phosphides for efficient and industrial water electrolysis.
- Author
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Liu ZZ, Yu N, Fan RY, Dong B, and Yan ZF
- Abstract
Renewable energy electrolysis of water to produce hydrogen is an effective measure to break the energy dilemma. However, achieving activity and stability at a high current density is still a key problem in water electrolyzers. Transition metal phosphides (TMPs), with high activity and relative inexpensiveness, have become excellent candidates for the production of highly pure green hydrogen for industrial applications. In this mini-review, multilevel regulation strategies including nanoscale control, surface composition and interface structure design of high-performance TMPs for hydrogen evolution are systematically summarized. On this basis, in order to achieve large-scale hydrogen production in industry, the hydrogen evolution performance and stability of TMPs at a high current density are also discussed. Peculiarly, the practical application and requirements in proton exchange membrane (PEM) or anion exchange membrane (AEM) electrolyzers can guide the advanced design of regulatory strategies of TMPs for green hydrogen production from renewable energy. Finally, the challenges and prospects in the future development trend of TMPs for efficient and industrial water electrolysis are given.
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- 2024
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17. Oxygen-deficient WO 3-x spheres for electrochemical N 2 oxidation to nitrate.
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Zhang Y, Xu T, Shang Y, Zhang G, and Yan ZF
- Abstract
Nitrate synthesis via the electrochemical nitrogen oxidation reaction (e-NOR) is widely recognized as a potential alternative to the energy-intensive Ostwald process. However, electrocatalysts with strong N
2 adsorption and activation abilities remain largely undeveloped due to kinetic hindrances caused by the high bond energy of NN. Here we designed a hollow WO3 sphere with an optimal concentration of oxygen vacancies and studied its e-NOR performance. The optimally synthesized oxygen-deficient WO3 (WO3-x ) achieved a high nitrate yield of 311.15 µmol h-1 gcat. -1 and a Faraday efficiency of 2.00 %, which is probably due to the presence of a moderate amount of oxygen vacancies on the WO3-x surface and the hollow spherical structure, which further improves the accessibility of the inner active surface. Our work could potentially stimulate research into transition metal oxide-based materials for e-NOR applications., Competing Interests: Declaration of Competing Interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Guoxin Zhang reports was provided by National Natural Science Foundation of China., (Copyright © 2023 Elsevier Inc. All rights reserved.)- Published
- 2023
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18. Current Fungal Taxonomy and Developments in the Identification System.
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Lin P, Kook M, Yi TH, and Yan ZF
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- Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization methods, Phylogeny, DNA, Ribosomal, Phenotype, Fungi
- Abstract
A functional identification system is the core and basis of fungal taxonomy, which provides sufficient diagnostic characteristics for species delimitation. Phenotype-based identification systems have exhibited significant drawbacks, such as being laborious and time-consuming. Thus, a molecular-based identification system (rDNA, DNA fingerprint, etc.) is proposed for application to fungi that lack reliable morphological characteristics. High Throughput Sequencing also makes great contributions to fungal taxonomy. However, the formal naming of nonculturable fungi from environmental sequencing is a significant challenge. Biochemical profile-based identification systems have outstanding value in fungal taxonomy and can occasionally be indispensable. This method utilizes biomarker metabolites and proteins that are expected to be unequivocal and stable. Of these, Matrix-Assisted Laser Desorption Ionization-Time of Flight Mass Spectrometry has become the method of choice for chemotaxonomy. In sum, these described identification systems cannot solve all problems of species delimitation, and considerable attention to the updating of fungal nomenclature, standardization of techniques, knowledge sharing, and dissemination will be necessary., (© 2023. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
- Published
- 2023
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19. Carbon dot decorated Co 3 O 4 nanozymes responsive to the NIR-II window for mild photothermal-enhanced nanocatalytic therapy.
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Wang N, Dong T, Shi W, Li LA, Ye MX, Fu XY, Yan ZF, and Meng YG
- Subjects
- Cell Line, Tumor, Peroxidases, Photothermal Therapy, Carbon
- Abstract
Although NIR-II laser-mediated photothermal therapy (PTT) is considered as an emerging strategy for tumor therapy, its therapeutic effects are still seriously hampered by low photothermal conversion efficacy, limited tissue penetration depth, and inevitable damage to adjoining healthy tissues. Herein, we report a mild second-near-infrared (NIR-II) photothermal-augmented nanocatalytic therapy (NCT) nanoplatform based on CD@Co
3 O4 heterojunctions by depositing NIR-II-responsive carbon dots (CDs) onto the surface of Co3 O4 nanozymes. The as-prepared Co3 O4 nanozymes possess multi-enzyme-mimicking catalytic activity including peroxidase, catalase, and glutathione-peroxidase to realize the cascade amplification of ROS levels owing to the presence of multivalent Co2+ and Co3+ . CDs with a high NIR-II photothermal conversion efficiency (PCE) (51.1%) enable the realization of mild PTT (∼43 °C), which could not only avoid damage to adjoining healthy tissues but also enhance the multi-enzyme-mimic catalytic activity of Co3 O4 nanozymes. More importantly, the NIR-II photothermal properties of CDs and the multi-enzyme-mimicking catalytic activity of Co3 O4 nanozymes are greatly augmented by the fabrication of heterojunctions due to the induced localized surface plasmonic resonance (LSPR) and accelerated carrier transfer. On the basis of these advantages, satisfactory mild PTT-amplified NCT is accomplished. Our work presents a promising approach for mild NIR-II photothermal-amplified NCT based on semiconductor heterojunctions.- Published
- 2023
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20. Benchmark Dose Assessment for Coke Oven Emissions-Induced Mitochondrial DNA Copy Number Damage Effects.
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Yan ZF, Gu ZG, Fan YH, Li XL, Niu ZM, Duan XR, Mallah AM, Zhang Q, Yang YL, Yao W, and Wang W
- Subjects
- Male, Female, Animals, DNA Copy Number Variations, Benchmarking, DNA, Mitochondrial genetics, DNA Damage, Coke, Polycyclic Aromatic Hydrocarbons, Occupational Exposure adverse effects, Occupational Exposure analysis
- Abstract
Objective: The study aimed to estimate the benchmark dose (BMD) of coke oven emissions (COEs) exposure based on mitochondrial damage with the mitochondrial DNA copy number (mtDNAcn) as a biomarker., Methods: A total of 782 subjects were recruited, including 238 controls and 544 exposed workers. The mtDNAcn of peripheral leukocytes was detected through the real-time fluorescence-based quantitative polymerase chain reaction. Three BMD approaches were used to calculate the BMD of COEs exposure based on the mitochondrial damage and its 95% confidence lower limit (BMDL)., Results: The mtDNAcn of the exposure group was lower than that of the control group (0.60 ± 0.29 vs. 1.03 ± 0.31; P < 0.001). A dose-response relationship was shown between the mtDNAcn damage and COEs. Using the Benchmark Dose Software, the occupational exposure limits (OELs) for COEs exposure in males was 0.00190 mg/m
3 . The OELs for COEs exposure using the BBMD were 0.00170 mg/m3 for the total population, 0.00158 mg/m3 for males, and 0.00174 mg/m3 for females. In possible risk obtained from animal studies (PROAST), the OELs of the total population, males, and females were 0.00184, 0.00178, and 0.00192 mg/m3 , respectively., Conclusion: Based on our conservative estimate, the BMDL of mitochondrial damage caused by COEs is 0.002 mg/m3 . This value will provide a benchmark for determining possible OELs., (Copyright © 2023 The Editorial Board of Biomedical and Environmental Sciences. Published by China CDC. All rights reserved.)- Published
- 2023
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21. A novel and alternative therapy for persistent allergic rhinitis via intranasal acupuncture: a randomized controlled trial.
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Liu LL, Gong Z, Tang L, and Yan ZF
- Subjects
- Humans, Quality of Life, Budesonide therapeutic use, Administration, Intranasal, Treatment Outcome, Rhinitis, Allergic drug therapy, Acupuncture Therapy methods
- Abstract
Background: Acupuncture is used to treat allergic rhinitis (AR) in traditional Chinese medicine, and the ST2 and ST36 acupoints are generally selected in clinical practice. We report a new intranasal acupuncture method at the Neiyingxiang (EX-HN9) and Biqiu points for the treatment of persistent AR (PAR). Here, the efficacy and safety of this method were evaluated., Methods: A total of 120 patients diagnosed with PAR were randomly allocated (2:1 ratio) to intranasal acupuncture or Western medicine groups, the basic principle of random grouping is SAS random grouping method. The applicator held a nasal endoscope and a 0.30 × 75 mm filiform needle in their left and right hands, respectively. When aiming at the Neiyingxiang or Biqiu point, the applicator quickly inserted the needle to a 20-mm depth as parallel as possible to the inferior turbinate or middle turbinate, without special reinforcing and reducing techniques (the needle remained for 20 min). The intranasal acupuncture groups received acupuncture treatment three times per week for 2 weeks. The Western medicine group was treated with budesonide nasal spray (two sprays/nostril, twice/day) and loratadine (one tablet/night) for 2 weeks. Visual analog scale (VAS) scores were the primary outcome. Quality of life, medication dosages and adverse events were secondary outcomes measured using the Rhinoconjunctivitis Quality-of-Life Questionnaire (RQLQ). Confidence assessments were performed to evaluate data from the treatment and follow-up periods., Results: The results were as follows: (1) VAS and RQLQ scores were significantly lower in the intranasal acupuncture group than in the Western medicine group on day 1 (i.e., first treatment) (P < 0.05; 95% CI - 13.1 to - 9.6 VAS points) (P < 0.05; 95% CI - 20.27 to - 12.28 RQLQ points). Overall symptoms (95% CI - 2.86 to - 1.86 points), nasal obstruction (95% CI - 6.33 to - 5.36 points), olfactory function (95% CI - 2.91 to - 1.75 points), sleep (95% CI - 5.05 to - 3.57 points), actual problems (95% CI - 2.03 to - 0.06 points), nasal symptoms (95% CI - 6.62 to - 4.5 points), and emotional problems (95% CI - 5.05 to - 3.5 points) were significantly improved. (2) VAS and RQLQ scores in the two groups were significantly improved at week 2; however, there were no significant group differences in the VAS (P > 0.05; 95% CI - 1.21 to - 1.38 points) and RQLQ (P > 0.05; 95% CI - 0.33 to - 3.46 points) scores. Olfactory function symptoms were significantly improved (95% CI - 1.58 to - 0.21 points). (3) During the follow-up period, there was a significant difference between the two groups (P < 0.05) with higher RQLQ and VAS scores in the intranasal acupuncture group than in the Western medicine group. VAS scores on rhinobyon symptoms, nasal itch, rhinorrhea and olfactory function and RQLQ scores for activities, non-nasal/eye symptoms, actual problems, nasal symptoms, and eye symptoms were significantly improved. (4) No adverse events were observed in either group during treatment., Conclusions: Intranasal acupuncture has good efficacy and safety in the treatment of PAR. Moreover, VAS and RQLQ scores were much lower in the intranasal acupuncture group than in the Western medicine group, and acupuncture had an immediate impact, especially for improving nasal congestion, olfactory function and sleep., (© 2023. The Author(s).)
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- 2023
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22. Optomechanical force sensor operating over wide detection range.
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Yan ZF, He B, and Lin Q
- Abstract
A detector with both broad operation range and high sensitivity is desirable in the measurement of weak periodic forces. Based on a nonlinear dynamical mechanism of locking the mechanical oscillation amplitude in optomechanical systems, we propose a force sensor that realizes the detection through the cavity field sidebands modified by an unknown external periodic force. Under the mechanical amplitude locking condition, the unknown external force happens to modify the locked oscillation amplitude linearly to its magnitude, thus achieving a linear scaling between the sideband changes read by the sensor and the magnitude of the force to be measured. This linear scaling range is found to be comparable to the applied pump drive amplitude, so the sensor can measure a wide range of force magnitude. Because the locked mechanical oscillation is rather robust against thermal perturbation, the sensor works well at room temperature. In addition to weak periodic forces, the same setup can as well detect static forces, though the detection ranges are much narrower.
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- 2023
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23. Analysis of Chinese Medical Syndrome Features of Ischemic Stroke Based on Similarity of Symptoms Subgroup.
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Liu XQ, Zhang RS, Zhou XZ, Zhou H, He YY, Han S, Zhang J, Shu ZX, Zhang XB, Ji JH, Zhong Q, Zhang LL, Mou ZJ, He LY, Zhang LZ, Yang J, Hu YJ, Chen ZG, Li XZ, Tan Y, Yan ZF, Cao KG, Meng W, Zhao H, Zhang W, and Zhong LQ
- Subjects
- Humans, Syndrome, Medicine, Chinese Traditional, Liver, Phenotype, Ischemic Stroke
- Abstract
Objective: To derive the Chinese medicine (CM) syndrome classification and subgroup syndrome characteristics of ischemic stroke patients., Methods: By extracting the CM clinical electronic medical records (EMRs) of 7,170 hospitalized patients with ischemic stroke from 2016 to 2018 at Weifang Hospital of Traditional Chinese Medicine, Shandong Province, China, a patient similarity network (PSN) was constructed based on the symptomatic phenotype of the patients. Thereafter the efficient community detection method BGLL was used to identify subgroups of patients. Finally, subgroups with a large number of cases were selected to analyze the specific manifestations of clinical symptoms and CM syndromes in each subgroup., Results: Seven main subgroups of patients with specific symptom characteristics were identified, including M3, M2, M1, M5, M0, M29 and M4. M3 and M0 subgroups had prominent posterior circulatory symptoms, while M3 was associated with autonomic disorders, and M4 manifested as anxiety; M2 and M4 had motor and motor coordination disorders; M1 had sensory disorders; M5 had more obvious lung infections; M29 had a disorder of consciousness. The specificity of CM syndromes of each subgroup was as follows. M3, M2, M1, M0, M29 and M4 all had the same syndrome as wind phlegm pattern; M3 and M0 both showed hyperactivity of Gan (Liver) yang pattern; M2 and M29 had similar syndromes, which corresponded to intertwined phlegm and blood stasis pattern and phlegm-stasis obstructing meridians pattern, respectively. The manifestations of CM syndromes often appeared in a combination of 2 or more syndrome elements. The most common combination of these 7 subgroups was wind-phlegm. The 7 subgroups of CM syndrome elements were specifically manifested as pathogenic wind, pathogenic phlegm, and deficiency pathogens., Conclusions: There were 7 main symptom similarity-based subgroups in ischemic stroke patients, and their specific characteristics were obvious. The main syndromes were wind phlegm pattern and hyperactivity of Gan yang pattern., (© 2022. The Chinese Journal of Integrated Traditional and Western Medicine Press and Springer-Verlag GmbH Germany, part of Springer Nature.)
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- 2023
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24. [Network Meta-analysis of single Hirudo prescriptions in treatment of ischemic cerebrovascular disease].
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Yan ZF, Sun RH, Chen YF, and Yu KD
- Subjects
- Humans, Animals, Capsules, Network Meta-Analysis, Combined Modality Therapy, Prescriptions, Leeches, Cerebrovascular Disorders
- Abstract
This study intended to evaluate the efficacy and safety of single Hirudo prescriptions in the treatment of ischemic cerebrovascular disease(ICVD) by frequency network Meta-analysis and traditional Meta-analysis. CNKI, Wanfang, VIP, SinoMed, PubMed, EMbase, and Cochrane Library databases were searched to collect the randomized controlled trial(RCT) of single Hirudo prescriptions for ICVD from the inception of the databases to May 2022. The quality of the included literature was evaluated by Cochrane risk of bias tool. Finally, 54 RCTs and 3 single Hirudo prescriptions were included. Statistical analysis was conducted by RevMan 5.3 and Stata SE 15. Network Meta-analysis showed that in terms of the clinical effective rate, the surface under the cumulative ranking curve(SUCRA) of intervention measures was as follows: Huoxue Tongmai Capsules+conventional treatment>Maixuekang Capsules+conventional treatment>Naoxuekang Capsules+conventional treatment>conventional treatment. Traditional Meta-analysis revealed that in terms of the safety of ICVD treatment, Maixuekang Capsules+conventional treatment had higher safety than conventional treatment alone. According to the network Meta-analysis and traditional Meta-analysis, it was found that conventional treatment combined with single Hirudo prescriptions improved the clinical efficacy of ICVD patients, and compared with that of conventional treatment alone, the incidence of adverse reactions of combined treatment was low and the safety was high. However, the methodological quality of the articles included in this study was generally low and there were large differences in the number of articles on the three combined medication. Therefore, the conclusion of this study needed to be confirmed by subsequent RCT.
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- 2023
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25. Synergism Between Multi-Pseudomonas and Cutinase for Biodegradation of Crude Oil-Based Derivatives.
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Yan ZF, Xu KW, and Wu J
- Subjects
- Pseudomonas, Petroleum
- Abstract
Polyethylene terephthalate (PET) as one of the main crude oil-based derivatives, produces a significant amount of waste that is difficult to degrade. Currently, microbial degradation of PET is an eco-friendly, efficient, and economical method. This study was conducted to propose a novel screening strategy for PET-degrading bacteria, and evaluate their degradation efficiency of PET. Two strains, Pseudomonas nitroreducens S8 and Pseudomonas monteilii S17, were isolated and could utilize PET as a carbon source by co-culture. The combined use of both bacteria gave a synergistic effect on the disruption of the PET surface through colonization behavior, which could enhance the subsequent degradation of PET. Its time of reaching a peak value of PET degradation rate (94.5% at 6 d) was 2 days earlier than these of single bacteria. A similar synergistic effect was also observed in the metabolization of PET monomers, and the metabolic rate was expressed as 82.4% of bis (2-hydroxyethyl) terephthalate (BHET), 64.0% of mono (2-hydroxyethyl) terephthalate (MHET), and 20.0% of terephthalic acid (TPA), respectively. This study is novel in showing the degradation of PET waste by combinations of bacterial pretreatment and enzymatic treatment, which can be a promising method., (© 2022. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
- Published
- 2022
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26. Directional-path modification strategy enhances PET hydrolase catalysis of plastic degradation.
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Chen XQ, Guo ZY, Wang L, Yan ZF, Jin CX, Huang QS, Kong DM, Rao DM, and Wu J
- Subjects
- Catalysis, Molecular Docking Simulation, Polyethylene Terephthalates chemistry, Polyethylene Terephthalates metabolism, Hydrolases metabolism, Plastics
- Abstract
Poly (ethylene terephthalate) (PET) is a widely used type of general plastic that produces a significant amount of waste due to its non-degradable properties. We propose a novel directional-path modification (DPM) strategy, involving positive charge amino acid introduction and binding groove remodeling, and apply it to Thermobifida fusca cutinase to enhance PET degradation. The highest value of PET degradation (90%) was achieved in variant 4Mz (H184S/Q92G/F209I/I213K), exhibiting values almost 30-fold that of the wild-type. We employed molecular docking, molecular dynamics simulations, and QM/MM MD for the degradation process of PET, accompanied by acylation and deacylation. We found that the distance of nucleophilic attack was reduced from about 4.6 Å in the wild type to 3.8 Å in 4Mz, and the free energy barrier of 4Mz dropped from 14.3 kcal/mol to 7.1 kcal/mol at the acylation which was the rate-limiting step. Subsequently, the high efficiency and universality of the DPM strategy were successfully demonstrated in LCC, Est119, and BhrPETase enhancing the degradation activity of PET. Finally, the highest degradation rate of the pretreated commercial plastic bottles had reached to 73%. The present study provides insight into the molecular binding mechanism of PET into the PET hydrolases structure and proposes a novel DPM strategy that will be useful for the engineering of more efficient enzymes for PET degradation., (Copyright © 2022 Elsevier B.V. All rights reserved.)
- Published
- 2022
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27. Accelerated biodegradation of polyethylene terephthalate by Thermobifida fusca cutinase mediated by Stenotrophomonas pavanii.
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Huang QS, Yan ZF, Chen XQ, Du YY, Li J, Liu ZZ, Xia W, Chen S, and Wu J
- Subjects
- Stenotrophomonas, Thermobifida, Carboxylic Ester Hydrolases, Polyethylene Terephthalates
- Abstract
Polyethylene terephthalate (PET) is a general plastic that produces a significant amount of waste due to its non-biodagradable properties. We obtained four bacteria (Stenotrophomonas pavanii JWG-G1, Comamonas thiooxydans CG-1, Comamonas koreensis CG-2 and Fulvimonas soli GM-1) that utilize PET as a sole carbon source through a novel stepwise screening and verification strategy. PET films pretreated with S. pavanii JWG-G1 exhibited weight loss of 91.4% following subsequent degradation by Thermobifida fusca cutinase (TfC). S. pavanii JWG-G1 was able to colonize the PET surface and maintain high cell viability (over 50%) in biofilm, accelerating PET degradation. Compared with PET films with no pretreatment, pretreatment with S. pavanii JWG-G1 caused the PET surface to be significantly rougher with greater hydrophilicity (contact angle of 86.3 ± 2° vs. 96.6 ± 2°), providing better opportunities for TfC to contact and act on PET. Our study indicates that S. pavanii JWG-G1 could be used as a novel pretreatment for efficiently accelerating PET biodegradation by TfC., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2021 Elsevier B.V. All rights reserved.)
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- 2022
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28. Genetic and Chemical Diversity of Edible Mushroom Pleurotus Species.
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Lin P, Yan ZF, Kook M, Li CT, and Yi TH
- Subjects
- Amino Acids genetics, Bayes Theorem, Fatty Acids analysis, Mycolic Acids, Phylogeny, Agaricales genetics, Pleurotus chemistry, Pleurotus genetics
- Abstract
The genus Pleurotus is one of the most widely cultivated and edible mushrooms with various cultivators. Three molecular characteristics were used to evaluate the genetic diversity of 132 tested samples. Phylogenetic analysis showed five clades for tested samples of the genus Pleurotus by the combined ITS and LSU sequences with strong bootstraps and Bayesian posterior probability supports. A total of 94 polymorphic fragments ranging from 10 to 100 bp were observed by using an intersimple sequence repeat (ISSR) marker. The DNA fragment pattern showed that P. ostreatus cultivator (strain P9) was clearly distinguished from wild strain based on their clear banding profiles produced. DNA GC content of the genus Pleurotus varied from 55.6 mol% to 43.3 mol%. Their chemical composition was also determined, including sugar, amino acid, polar lipid, mycolic acid, quinone, and fatty acid, which presented some high homogeneity. Most of the tested samples contained mycolic acid; glucose and arabinose as the main sugars; aspartic acid, arginine, lysine, tyrosine, and alanine as the main amino acids; and C
16:0 , C18:0 , C18:2 cis -9,12, anteiso -C14:0 , and summed feature 8 as the main fatty acids. In addition, their polar lipid profiles were investigated for the first time, which significantly varied among Pleurotus species. The genus Pleurotus contained menaquinone-6 as the sole respiratory quinone, which showed a significant difference with that of its closely related genera. These results of this study demonstrated that the combined method above could efficiently differentiate each Pleurotus species and thus be considered an efficient tool for surveying the genetic diversity of the genus Pleurotus ., Competing Interests: The authors declare that they have no conflicts of interest., (Copyright © 2022 Pei Lin et al.)- Published
- 2022
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29. Isobutane dehydrogenation over high-performanced sulfide V-K/γ-Al 2 O 3 catalyst: Modulation of vanadium species and intrinsic effect of potassium.
- Author
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Tian YP, Liu XM, Mintova S, Zhang LL, Pan YY, Rives A, Liu YA, Wei L, and Yan ZF
- Subjects
- Butanes, Oxidation-Reduction, Sulfides, Potassium, Vanadium
- Abstract
Compared with industrial used Pt- and Cr-based catalyst in dehydrogenation (DH) of light alkanes, the sulfide V-K/γ-Al
2 O3 catalyst reported in this study shows lower cost and toxicity, and significant DH performance. The yield to isobutene reached as high as 52.9%, which is among the highest reported to date. We attribute such high isobutene yield to the precise modulation of polymerization degree for vanadium species via doping of potassium and indicating that the synergy between vanadium species and acid sites is critical to enhance the DH performance. Our previous work showed sulfidation promoted the increase of DH performance for vanadium-based catalyst, and we go further in this study to explore the correlation between increased range of DH performance and the added potassium. The different loaded potassium leads to variation in sulfidation degree, affecting the properties of vanadium species and acid properties consequently. The potassium was distributed uniformly on surface of the sulfide vanadium-based catalyst and was predominantly bonded with the vanadium species rather than with the γ-Al2 O3 support. With increasing the potassium amount from 0 to 3 wt%, the acid amount kept decreasing, and some specific strong acid sites appeared once adequate sulfur was introduced in the V-K/γ-Al2 O3 catalyst. The characterization and DFT results both revealed that the doped potassium contributes to regulating the vanadium species in the oligomeric state. The synergy between vanadium species and acid properties was regulated by the added potassium simultaneously, and thus the DH performance was enhanced. This study provides promising strategy for preparation of environment-friendly model industrial DH catalyst., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2021 Elsevier Inc. All rights reserved.)- Published
- 2021
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30. Switching from efavirenz to elvitegravir/cobicistat/emtricitabine/tenofovir alafenamide reduces central nervous system symptoms in people living with HIV.
- Author
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Xia H, Huang XJ, Hu Y, Gao LY, Wu Y, Wu H, Yan ZF, and Ma P
- Subjects
- Adenine therapeutic use, Adult, Alanine, Alkynes, Benzoxazines, Central Nervous System, Cobicistat therapeutic use, Cyclopropanes, Drug Combinations, Emtricitabine therapeutic use, Female, Humans, Male, Prospective Studies, Quality of Life, Quinolones, Sleep Quality, Tenofovir analogs & derivatives, Anti-HIV Agents adverse effects, HIV Infections drug therapy
- Abstract
Background: Central nervous system (CNS) symptoms after efavirenz (EFV) treatment in people living with human immunodeficiency virus (HIV) could persist and impact their quality of life. We assessed the impact of EFV-based regimen replacement with elvitegravir/cobicistat/emtricitabine/tenofovir alafenamide (E/C/F/TAF), which is considered an alternative option for subjects who do not tolerate EFV. Most specifically, we assessed the safety and the efficacy of E/C/F/TAF and its effects on the participants' neuropsychiatric toxicity symptoms in a real-life setting., Methods: A prospective cohort study was conducted among virologic suppressed HIV-positive participants receiving EFV-based regimens with ongoing CNS toxicity ≥ grade 2. The participants were switched to single-pill combination regimens E/C/F/TAF and followed up for 48 weeks. The neuropsychiatric toxicity symptoms were measured using a CNS side effects questionnaire, as well as the Hospital Anxiety and Depression Scale and the Pittsburgh Sleep Quality Index. The primary outcome measure was the proportion of participants experiencing grade 2 or higher CNS toxicity after EFV switch off at weeks 12, 24, and 48. Secondary endpoints included virologic and immunological responses and the effect on fasting lipids at week 48 after switch., Results: One hundred ninety-six participants (96.9% men, median age: 37.5 years, median: 3.7 years on prior EFV-containing regimens) were included in the study. Significant improvements in anxiety and sleep disturbance symptoms were observed at 12, 24, and 48 weeks after switching to E/C/F/TAF (P < 0.05). No significant change in depression symptom scores was observed. At 48 weeks after switch, HIV viral load <50 copies/mL was maintained in all of the participants, median fasting lipid levels were moderately increased (total cholesterol [TC]: 8.2 mg/dL, low-density lipoprotein cholesterol [LDL-C]: 8.5 mg/dL, high-density lipoprotein cholesterol [HDL-C]: 2.9 mg/dL, and triglyceride (TG): 1.6 mg/dL, and the TC:HDL-C ratio remained stable., Conclusions: The single-pill combination regimens E/C/F/TAF is safe and well tolerated. This study reveals that switching from EFV to E/C/F/TAF significantly reduces neuropsychiatric toxicity symptoms in people living with HIV with grade 2 or higher CNS complaints., (Copyright © 2021 The Chinese Medical Association, produced by Wolters Kluwer, Inc. under the CC-BY-NC-ND license.)
- Published
- 2021
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31. [The research progress of excitatory and inhibitory inputs of lateral superior olive].
- Author
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Zhou M, Liu JF, Yuan JJ, Yan ZF, Dai JS, Ge XY, and Wang NY
- Subjects
- Humans, Neurons, Olivary Nucleus, Superior Olivary Complex
- Published
- 2021
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32. Blockage of glioma cell survival by truncated TEAD-binding domain of YAP.
- Author
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Zhao W, Dong QF, Li LW, Yan ZF, Huo JL, Chen XY, Yang X, Li PQ, Fei Z, and Zhen HN
- Subjects
- Animals, Binding, Competitive, Cell Cycle Proteins chemistry, Cell Cycle Proteins genetics, Cell Cycle Proteins metabolism, Central Nervous System Neoplasms diagnosis, Central Nervous System Neoplasms genetics, Codon, Nonsense genetics, Cohort Studies, DNA-Binding Proteins metabolism, Gene Expression Regulation, Neoplastic, Glioma diagnosis, Glioma genetics, Humans, Mice, Mice, Nude, Nuclear Proteins metabolism, Protein Binding, Protein Interaction Domains and Motifs genetics, Recombinant Proteins chemistry, Recombinant Proteins genetics, Recombinant Proteins metabolism, TEA Domain Transcription Factors, Transcription Factors chemistry, Transcription Factors genetics, Transcription Factors metabolism, Tumor Cells, Cultured, Xenograft Model Antitumor Assays, Cell Cycle Proteins pharmacology, Cell Survival drug effects, Central Nervous System Neoplasms pathology, Glioma pathology, Recombinant Proteins pharmacology, Transcription Factors pharmacology
- Abstract
Background: Gliomas are highly aggressive and lack of efficient targeted therapy. YAP, as a Hippo pathway downstream effector, plays a key role in promoting tumor development through the interaction with transcription factor TEAD on the NH3-terminal proline-rich domain. Therefore, targeting TEAD-interacting domain of YAP may provide a novel approach for the treatment of gliomas., Materials and Methods: We generated a truncated YAP protein which includes the TEAD-binding domain (YAPBD), and supposed YAPBD can interact with endogenous TEAD but lost the function to activate YAP target gene expressions. The association of YAP expression with the malignant characters of glioma tissues were determined by immunohistochemistry. TEAD-binding capacity of YAPBD was determined by co-immunoprecipitation. The cell proliferation and migration were determined by MTT assay, xenograft assay, wound healing assay and transwell assay, respectively. YAP target genes were detected by Western blot., Results: YAP was highly expressed in glioma tissues and associated with tumor malignancy. YAPBD could block the TEAD-YAP complex formation by competing with YAP binding to TEAD. YAPBD could inhibit glioma cell growth both in vitro and in vivo, through the induction of cell cycle arrest and apoptosis. The cell cycle-related gene cyclin D1 and c-myc, and anti-apoptotic gene Bcl-2, Bcl-xL and survivin were inhibited after YAPBD overexpression. Furthermore, YAPBD also decreased cell migration and invasion, and repressed epithelial-mesenchymal transition., Conclusion: YAPBD can block glioma cell survival and repress YAP-dependent gene expressions, indicating gene therapy which targets TEAD-YAP complex would be a potential and significant novel approach for human malignant gliomas.
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- 2021
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33. Synergistic biodegradation of poly(ethylene terephthalate) using Microbacterium oleivorans and Thermobifida fusca cutinase.
- Author
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Yan ZF, Wang L, Xia W, Liu ZZ, Gu LT, and Wu J
- Subjects
- Carboxylic Ester Hydrolases genetics, Ethylenes, Hydrolysis, Phthalic Acids, Thermobifida, Microbacterium, Polyethylene Terephthalates
- Abstract
Poly(ethylene terephthalate) (PET) is a major source of plastic pollution. Biodegradation technologies are of paramount interest in reducing or recycling PET waste. In particular, a synergistic microbe-enzyme treatment may prove to be a promising approach. In this study, a synergistic system composed of Microbacterium oleivorans JWG-G2 and Thermobifida fusca cutinase (referred to as TfC) was employed to degrade bis(hydroxyethyl) terephthalate (BHET) oligomers and a high crystalline PET film. A novel degradation product that was obtained by M. oleivorans JWG-G2 treatment alone was identified as ethylene glycol terephthalate (EGT). With the addition of TfC as a second biocatalyst, the highest synergy degrees for BHET oligomers and PET film degradation were 2.79 and 2.26, respectively. The largest amounts of terephthalic acid (TPA) and mono(2-hydroxyethyl) terephthalate (MHET) (47 nM and 330 nM, respectively) were detected after combined treatment of PET film with M. oleivorans JWG-G2 at 5 × 10
3 μL/cm2 and TfC at 120 μg/cm2 , and the degree of PET film surface destruction was more significant than those produced by each treatment alone. The presence of extracellular PET hydrolases in M. oleivorans JWG-G2, including three carboxylesterases, an esterase and a lipase, was predicted by whole genome sequencing analysis, and a predicted PET degradation pathway was proposed for the synergistic microbe-enzyme treatment. The results indicated that synergistic microbe-enzyme treatment may serve as a potentially promising tool for the future development of effective PET degradation. KEY POINTS: • An ecofriendly synergistic microbe-enzyme PET degradation system operating at room temperature was first introduced for degrading PET. • A novel product (EGT) was first identified during PET degradation. • Potential PET hydrolases in M. oleivorans JWG-G2 were predicted by whole genome sequencing analysis.- Published
- 2021
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34. Patients with different types of arthritis may be at risk for major depression: results from the National Health and Nutrition Examination Survey 2007-2018.
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Wang MY, Li J, Peng HY, Liu J, Huang KL, Li L, Yan ZF, and Zhao ZH
- Subjects
- Adult, Cross-Sectional Studies, Depression, Female, Humans, Male, Nutrition Surveys, Arthritis, Rheumatoid, Depressive Disorder, Major epidemiology, Diabetes Mellitus
- Abstract
Background: Arthritis is one of the common causes of physical pain and disability, which often makes patients fall into major depression. However, the correlation between arthritis and major depression, and how different types of arthritis correspond to major depression remain to be explored. The purpose of this study is to explore the relationship between arthritis and major depression., Methods: Arthritis status was reported by participants themselves, and the Patient Health Questionnaire-9 in National Health and Nutrition Examination Survey (NHANES) was used to evaluate major depression, logistic regression was used to evaluate the relationship between arthritis and major depression., Results: We analyzed the data of 25,990 adults who participated in the NHANES from 2007 to 2018. Participants with major depression were more likely to be female, Hispanic, smoker, less educated, less recreational activities, poverty-to-income ratio <5, coronary heart disease, stroke, cancer or malignant tumor, diabetes, hypertension and higher body mass index (BMI). Arthritis was significantly correlated with major depression (25.4% vs. 44.9%; P<0.001), even after adjusting for gender, age, race, BMI, PIR, education, marriage, moderate recreational activities, smoking, history of coronary heart disease, stroke, cancer or malignant tumor, diabetes, and hypertension (OR =2.30, 95% CI, 2.06-2.56, P<0.001). Subgroup analysis showed that compared with degenerative arthritis, rheumatoid arthritis (RA), or other arthritis, psoriatic arthritis (PsA) had the greatest influence on major depression patients., Conclusions: All patients with arthritis, especially PsA, may have the risk of major depression. Psychological intervention necessary for patients with arthritis.
- Published
- 2021
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35. [Effect of intranasal acupuncture on neurogenic inflammation in allergic rhinitis rabbits].
- Author
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Gong Z, Yan ZF, Liu QP, Liu LL, Liu SM, Jiao LL, Bian FZ, Zhang LJ, and Zhang LL
- Subjects
- Animals, Immunoglobulin E, Nasal Mucosa, Neurogenic Inflammation, Rabbits, Acupuncture Therapy, Rhinitis, Allergic genetics, Rhinitis, Allergic therapy
- Abstract
Objective: To observe the effect of intranasal acupuncture on allergic rhinitis (AR), and expression of substance P (SP), vasoactive intestinal peptide (VIP) and neuropeptide Y (NPY) proteins in the nasal mucosa and contents of serum immunoglobulin E (IgE), interleukin 4 (IL-4) and interferon-γ (IFN-γ) in AR rabbits, so as to explore its mechanisms underlying improvement of AR., Methods: New Zealand rabbits were randomly divided into normal control, AR model, non-acupuoint acupuncture (NAA) and intranasal acupuncture (INA) groups, with 8 rabbits in each group. The AR model was established by intra-peritoneal injection of egg protein and nasal mucosal stimulation. In the INA group, bilateral "Neiyingxiang" (EX-HN9) within the nasal cavity (the anterior attachment area of the inferior turbinate, about 1 cm away from the nasal limen) were acupunctured by mani-pulating the filiform needles for a while with uniform reinforcing and reducing methods, followed by keeping the needles for 20 min. In the NAA group, shallow acupuncture was applied to the skin of the outer margin of the cheeks, followed by keeping the needle for 20 min. The acupuncture treatment was conducted once every other day for 7 days. The symptoms of sneezing frequency, nasal secretion amount and nasal itching were scored. The expression levels of SP, VIP and NPY in the nasal mucosa tissue were detected by immunohistochemistry, and the serum IgE, IL-4, and IFN-γ contents were detected by ELISA., Results: After modelling, the symptom score, expression of SP and VIP, and serum IgE and IL-4 contents were significantly higher (P<0.01,P<0.05), NPY expression and serum IFN-γ content significantly lower (P<0.05, P<0.01) in the model group than in the normal control group. Following the intervention, the symptom scores, expressions of SP and VIP, and serum IgE and IL-4 contents were remarkably decreased (P<0.05, P<0.01), while the NPY expression and serum IFN-γ content were significantly up-regulated (P<0.05, P<0.01) in the INA group than in the model group. The effects of INA group were significantly superior to those of NAA group in reducing symptom score, SP and VIP expression, and serum IgE and IL-4 contents and up-regulating NPY expression and IFN-γcontent (P<0.05, P<0.01). There were a positive correlation between the expressions of SP and VIP and contents of serum IgE and IL-4 (P<0.05), and a negative correlation between the expressions of SP and VIP and IFN-γ content (P<0.05)., Conclusion: INA treatment can relieve symptoms of AR in AR rabbits, which may be associated with its effects in regulating the expression of SP, VIP and NPY of the nasal mucosa, and contents of serum IgE, IL-4 and IFN-γ to improve neurogenic inflammation.
- Published
- 2021
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36. Bipedicle Advancement Flap for Skin Coverage after Digital Mucous Cyst Excision: A Retrospective Study of 18 Cases.
- Author
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Ma YM, Meng XJ, Su Y, Yan ZF, Shao QS, and Chen YQ
- Subjects
- Aged, Female, Humans, Male, Middle Aged, Pain Measurement, Patient Satisfaction, Retrospective Studies, Cysts surgery, Fingers surgery, Osteophyte surgery, Plastic Surgery Procedures methods, Surgical Flaps
- Abstract
Objectives: To assess the clinical outcomes of using a bipedicle advancement flap to cover the skin defects after digital mucous cyst (DMC) excision., Methods: Data for 15 patients (18 fingers) with DMC, admitted to the Department of Orthopaedics and Surgery of the Affiliated Zhongshan Hospital of Dalian University from January 2016 to January 2018, were analyzed retrospectively. This study included 4 men and 11 women, with a mean age of 64 ± 7.8 years (range, 47-77 years). A total of 5 cases involved the thumb, 4 involved the index finger, 5 involved ithe middle finger, and 4 involved the ring finger. Among a total of 18 digital mucous cysts, 7 cases were in the left hand and 11 were in the right hand. Approximately 77.8% of cases had osteophytes. The cysts ranged in size from 0.5-1.0 cm to 0.7-1.2 cm. All patients underwent cyst and osteophyte excision and a bipedicle advancement flap to cover the resultant defect. The same surgical procedure was applied to all patients. Postoperative flap survival, healing, and infection were evaluated. The preoperative and postoperative ranges of motion (ROM) of the distal interphalangeal (DIP) and thumb interphalangeal joints (TIPJ) were recorded. Postoperative patient satisfaction was assessed by the visual analog scale (VAS, 0-10) during follow-up visits. The Shapiro-Wilk test was used to determine whether the data for the difference between the preoperative and postoperative ROM of the DIP/TIPJ were normally distributed or not. The homogeneity of variance was expressed as mean ± standard deviation. A paired t-test was used to compare the preoperative and postoperative ROM of the DIP/TIPJ., Results: The patients were followed up for 20 ± 6.0 months (range, 12-36 months). All the flaps survived after surgery, and the incisions healed well. The sutures were removed 2 weeks postoperatively. No infections occurred and there was no cyst recurrence at follow up. After systemic physical therapy and functional exercises, the ROM of all the fingers was restored to the preoperative ROM by 1 month after surgery. The scores for patient satisfaction with surgery by means of the VAS were 8.5 ± 1.0 points, 2.8 ± 1.4 points, 2.0 ± 1.6 points, 1.5 ± 1.2 points, and 1.1 ± 1.3 points preoperatively, and 1, 3, 6, and 12 months postoperatively, respectively. The data for the difference between preoperative and postoperative VAS scores were normally distributed. There were significant differences between the preoperative and postoperative VAS scores. The preoperative DIP/TIPJ ROM was 71.7° ± 14.0°, and the postoperative ROM at 1, 3, 6, and 12 months were 69.3° ± 15.3°, 70.4° ± 12.7°, 71.5° ± 15.6°, and 71.8° ± 15.6°, respectively. The data for the difference between preoperative and postoperative ROM of the DIP/TIPJ were normally distributed. No difference was found between the preoperative and postoperative ROM., Conclusion: The bipedicle advancement flap provides a simple and effective technique for covering skin defects following DMC excision., (© 2020 The Authors. Orthopaedic Surgery published by Chinese Orthopaedic Association and John Wiley & Sons Australia, Ltd.)
- Published
- 2021
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37. Arthrobacter sedimenti sp. nov., isolated from river sediment in Yuantouzhu park, China.
- Author
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Lin P, Yan ZF, and Li CT
- Subjects
- Arthrobacter chemistry, Arthrobacter genetics, Arthrobacter isolation & purification, Base Composition, China, DNA, Bacterial genetics, Nucleic Acid Hybridization, Peptidoglycan chemistry, RNA, Ribosomal, 16S genetics, Rivers microbiology, Species Specificity, Arthrobacter classification, Geologic Sediments microbiology, Soil Microbiology
- Abstract
A Gram-stain positive, motile, aerobic and rod-shaped strain (MIC A30
T ) was isolated from river sediment in Yuantouzhu park, Wuxi City, China. Growth occurred at 20-40 °C, at pH 6.0-9.0 and at 0-5.0% NaCl. Strain MIC A30T was moderately related to Arthrobacter liuii CGMCC 1.12778T (97.9%), Arthrobacter pokkaliiT (97.9%) and Arthrobacter globiformis NBRC 12137T (96.7%) by 16S rRNA analysis. The DNA-DNA relatedness values between strain MIC A30T and these reference strains were below 30%. The DNA G+C content was 63.1 mol%. Average nucleotide identity (ANI) and genome-to-genome distance (GGD) values between strain MIC A30T and A. liuii CGMCC 1.12778T were 60.34% and 29.39%, respectively. Quinone was identified as MK-9(H2). Major polar lipids were diphosphatidylglycerol and phosphatidylglycerol. Major fatty acids were iso-C15:0 , anteiso-C15:0 and anteiso-C17:0 . Whole-cell sugars were galactose, mannose and rhamnose. The cell wall peptidoglycan contained A4α peptidoglycan type with lysine as the diagnostic diamino acid. Based on several taxonomic results, strain MIC A30T is identified as a novel species in genus Arthrobacter, whose name is proposed as Arthrobacter sedimenti sp. nov. The type strain is MIC A30T (= KACC 19599T = CGMCC 1.13474T ).- Published
- 2020
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38. Effects of aging on gene expression in blood of captive Tibetan macaques ( Macaca thibetana ) and comparisons with expression in humans.
- Author
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Yan CC, Zhang XS, Zhou L, Yang Q, Zhou M, Zhang LW, Xing JC, Yan ZF, Price M, Li J, Yue BS, and Fan ZX
- Subjects
- Animals, Down-Regulation, Female, Humans, Male, RNA-Seq, Sequence Analysis, RNA, Species Specificity, Transcriptome, Aging physiology, Gene Expression Regulation physiology, Macaca blood
- Abstract
Changes in gene expression occur as animals, including primates, age. Macaques have long been used as a model species for primate evolution and biomedical studies. Here, to study gene expression in Tibetan macaques ( Macaca thibetana , TMs) and its differences to humans, we applied RNA-Seq to obtain the blood transcriptomes of 24 TMs. In total, 2 523 age-associated differentially expressed genes (DEGs) were identified. Several pathways and processes that regulate aging, including the FoxO signaling pathway, autophagy, and platelet activation, were significantly enriched in the up-regulated DEGs. Two significantly age-related modules were identified by weighted gene co-expression network analysis (WGCNA). The TMs and humans shared 279 common DEGs, including 111 up-regulated and 141 down-regulated genes with advancing age in the same expression direction. However, 27 age-related DEGs presented the opposite expression direction in TMs as that in humans. For example, INPPL1 , with inhibitory effects on the B cell receptor signaling pathway, was up-regulated in humans but down-regulated in TMs. In general, our study suggests that aging is a critical factor affecting gene expression in the captive TM population. The similarities and differences in gene expression patterns between TMs and humans could provide new insights into primate evolution and benefit TM model development.
- Published
- 2020
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39. Diffusion and catalyst efficiency in hierarchical zeolite catalysts.
- Author
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Peng P, Gao XH, Yan ZF, and Mintova S
- Abstract
The preparation of hierarchical zeolites with reduced diffusion limitation and enhanced catalyst efficiency has become a vital focus in the field of zeolites and porous materials chemistry within the past decades. This review will focus on the diffusion and catalyst efficiency of hierarchical zeolites and industrial catalysts. The benefits of diffusion and catalyst efficiency at two levels of hierarchies (zeolitic component level and industrial catalyst level) from a chemical reaction engineering point of view will be analysed. At zeolitic component level, three types of mesopores based on the strategies applied toward enhancing the catalyst effectiveness factor are presented: (i) 'functional mesopores' (raising effective diffusivity); (ii) 'auxiliary mesopores' (decreasing diffusion length); and (iii) 'integrated mesopores' (a combination thereof). At industrial catalyst level, location and interconnectivity among the constitutive components are revealed. The hierarchical pore interconnectivity in multi-component zeolite based industrial catalysts is exemplified by fluid catalytic cracking and bi-functional hydroisomerization catalysts. The rational design of industrial zeolite catalysts at both hierarchical zeolitic component and catalyst body levels can be fully comprehended using the advanced in situ and/or operando spectroscopic, microscopic and diffraction techniques., (© The Author(s) 2020. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd.)
- Published
- 2020
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40. Septoplasty alone is not suitable for most structural nasal obstructions.
- Author
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Liu JF, Yan ZF, Zhang ZJ, and Wang NY
- Abstract
Septoplasty is widely used in the treatment of structural nasal obstructions, and it also has a good effect and a high degree of postoperative satisfaction. However, there a large number of structures demonstrate abnormalities related to structural nasal obstruction, including the external nose, maxilla, nasal cavity and paranasal sinus. Nasal septum deviation is only one signs of structural nasal obstruction and does not represent all possible structural abnormalities of the nasal cavity and its surrounding structure. Septoplasty is only performed to correct deviations of the nasal septum, which in many cases is obviously insufficient in restoring the symmetry of the nasal structure. Therefore, septoplasty alone is not suitable for the treatment of most structural nasal obstructions. Nasal ventilation expansion surgery, which typically covers more abnormal structural correction procedures than septoplasty, should be used when describing the treatment of structural nasal obstruction., Competing Interests: The authors have no relevant competing interests to declare in relation to this manuscript., (© 2020 The Authors.)
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- 2020
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41. Luteimonas cellulosilyticus sp. nov., Cellulose-Degrading Bacterium Isolated from Soil in Changguangxi National Wetland Park, China.
- Author
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Lin P, Yan ZF, and Li CT
- Subjects
- China, Fatty Acids, Soil Microbiology, Wetlands, Xanthomonadaceae chemistry, Xanthomonadaceae classification, Xanthomonadaceae genetics
- Abstract
A Gram-negative, motile, aerobic, and rod-shaped strain (MIC 1.5
T ) was isolated from soil in Changguangxi national wetland park. Growth occurred at 20-45 °C, at pH 6.0-8.0, and at 0-4.0% NaCl. Based on 16S rRNA gene sequence analysis, strain MIC 1.5T was related to were identified as Luteimonas dalianensis CGMCC 1.12191T (95.3%), Luteimonas padinae DSM 101536T (94.5%), Luteimonas huabeiensis DSM 26429T (94.1%), and Luteimonas mephitis DSM 12574T (92.5%). The DNA-DNA relatedness values between strain MIC 1.5T , and these strains were well below 31%. The polar lipids were phosphatidylethanolamine, phosphatidylglycerol, and diphosphatidylglycerol. The DNA G+C content of strain MIC 1.5T was 66.3 mol%. Average nucleotide identity (ANI) and genome-to-genome distance (GGD) values between strain MIC 1.5T and L. dalianensis CGMCC 1.12191T were 65.39% and 29.52%, respectively. The quinone was identified as Q-8. The major fatty acids were iso-C15:0 , iso-C15:0 3OH, and iso-C17:0 3OH and summed feature 3 (C16:1 ω7c and/or iso-C15:0 2-OH). Based on the phylogenetic, physiological, and chemotaxonomic results, strain MIC 1.5T represents a novel species of the genus Luteimonas, for which the name Luteimonas cellulosilyticus sp. nov. is proposed. The type strain is MIC 1.5T (= KACC 19469T = CCTCC AB 2017256T ).- Published
- 2020
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42. LncRNA AC093818.1 accelerates gastric cancer metastasis by epigenetically promoting PDK1 expression.
- Author
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Ba MC, Ba Z, Long H, Cui SZ, Gong YF, Yan ZF, Lin KP, Wu YB, and Tu YN
- Subjects
- Animals, Cell Line, Tumor, Cell Movement genetics, Epigenesis, Genetic, Female, Gene Silencing, Humans, Liver Neoplasms genetics, Liver Neoplasms metabolism, Liver Neoplasms secondary, Lung Neoplasms genetics, Lung Neoplasms metabolism, Lung Neoplasms secondary, Lymphatic Metastasis genetics, Male, Mice, Mice, Nude, Middle Aged, Neoplasm Staging, Proto-Oncogene Proteins c-akt genetics, Proto-Oncogene Proteins c-akt metabolism, Pyruvate Dehydrogenase Acetyl-Transferring Kinase genetics, RNA, Long Noncoding genetics, RNA, Small Interfering, STAT3 Transcription Factor genetics, STAT3 Transcription Factor metabolism, Sp1 Transcription Factor genetics, Sp1 Transcription Factor metabolism, Stomach Neoplasms metabolism, TOR Serine-Threonine Kinases genetics, TOR Serine-Threonine Kinases metabolism, Up-Regulation, Pyruvate Dehydrogenase Acetyl-Transferring Kinase metabolism, RNA, Long Noncoding metabolism, Stomach Neoplasms genetics, Stomach Neoplasms pathology
- Abstract
Gastric cancer (GC) is a highly prevalent type of metastatic tumor. The mechanisms underlying GC metastasis are poorly understood. Some long noncoding RNAs (lncRNAs) reportedly play key roles in regulating metastasis of GC. However, the biological roles of five natural antisense lncRNAs (AC093818.1, CTD-2541M15.1, BC047644, RP11-597M12.1, and RP11-40A13.1) in GC metastasis remain unclear. In this study, the expression of these lncRNAs was measured by quantitative reverse transcription-polymerase chain reaction. Migration and invasion were evaluated by wound-healing and the Transwell assay, respectively. Stable cells were injected into the tail veins of nude mice. Sections of collected lung and liver tissues were stained using hematoxylin and eosin. Protein expression was analyzed by western blot. RNA immunoprecipitation (RIP) assay was used to verify whether the STAT3 and SP1 transcription factors bound to AC093818.1 in GC cells. Expression levels of the five lncRNAs, especially AC093818.1, were significantly upregulated in metastatic GC tissues relative to those in nonmetastatic GC tissues. AC093818.1 expression was correlated with invasion, lymphatic metastasis, distal metastasis, and tumor-node-metastasis stage. AC093818.1 expression was highly sensitive and specific in the diagnosis of metastatic or nonmetastatic GC. AC093818.1 overexpression promoted GC migration and invasion in vitro and in vivo. AC093818.1 overexpression increased PDK1, p-AKT1, and p-mTOR expression levels. AC093818.1 silencing decreased these expressions. AC093818.1 bound to transcription factors STAT3 and SP1, and SP1 or STAT3 silencing could alleviated the effect of AC093818.1 overexpression. The data demonstrate that lncRNA AC093818.1 accelerates gastric cancer metastasis by epigenetically promoting PDK1 expression. LncRNA AC093818.1 may be a potential therapeutic target for metastatic GC.
- Published
- 2020
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43. Cellulomonas aurantiaca sp. nov., isolated from a soil sample from a tangerine field.
- Author
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Kim SK, Kook M, Yan ZF, Trinh H, Zheng SD, Yang JE, Park SY, and Yi TH
- Subjects
- Cellulomonas genetics, Genome, Bacterial, Genomics methods, Phylogeny, RNA, Ribosomal, 16S genetics, Republic of Korea, Soil, Cellulomonas classification, Cellulomonas isolation & purification, Citrus, Soil Microbiology
- Abstract
A Gram-stain positive, facultatively aerobic, motile and rod-shaped bacterial strain, designated THG-SMD2.3
T , was isolated from a soil sample collected in a tangerine field, Republic of Korea. According to the 16S rRNA gene sequence comparisons, the isolate was identified as a member of the genus Cellulomonas and to be closely related to Cellulomonas fimi ATCC 484T (98.5%), Cellulomonas biazotea DSM 20112T (98.3%), Cellulomonas chitinilytica X.bu-bT (98.0%), Cellulomonas xylanilytica XIL11T (97.2%), Cellulomonas humilata ATCC 25174T (97.1%) and Cellulomonas composti TR7-06T (97.0%). The 16S rRNA gene sequence similarities with other current species of the genus Cellulomonas were in the range 95.4-96.6%. Catalase and oxidase tests were found to be positive. The DNA G+C content was determined to be 73.0 mol%. DNA-DNA hybridization values between strain THG-SMD2.3T and C. fimi ATCC 484T , C. biazotea DSM 20112T , C. chitinilytica X.bu-bT , C. xylanilytica XIL11T , C. humilata ATCC 25174T and C. composti TR7-06T were 58.1 ± 1.6%, 56.7 ± 0.8%, 30.3 ± 1.6%, 22.8 ± 1.6%, 19.9 ± 1.6%, and 13.5 ± 3.0%, respectively. Strain THG-SMD2.3T was also found to be able to grow at 20-42 °C, at 0-3% NaCl and at pH 5.5-10. The major fatty acids were identified as anteiso-C15:0 , iso-C15:0 , anteiso-C17:0 and iso-C14:0 . The predominant menaquinone was identified as tetrahydrogenated menaquinones with nine isoprene units [MK-9(H4 )]. The polar lipids were found to be diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, two unidentified aminolipids and two unidentified phospholipids. Based on these phenotypic, genotypic and phylogenetic characterisations strain THG-SMD2.3T (= KACC 19341T = CGMCC 1.16303T ) is concluded to represent a novel species of the genus Cellulomonas, for which the name Cellulomonas aurantiaca sp. nov. is proposed.- Published
- 2019
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44. Truncated TEAD-binding protein of TAZ inhibits glioma survival through the induction of apoptosis and repression of epithelial-mesenchymal transition.
- Author
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Zhao W, Li LW, Tian RF, Dong QF, Li PQ, Yan ZF, Yang X, Huo JL, Fei Z, and Zhen HN
- Subjects
- Animals, Biomarkers, Tumor, Brain Neoplasms genetics, Brain Neoplasms metabolism, Cell Movement, Cell Proliferation, DNA-Binding Proteins genetics, Gene Expression Regulation, Neoplastic, Glioma genetics, Glioma metabolism, Humans, Mice, Mice, Nude, Neoplasm Invasiveness, Nuclear Proteins genetics, Prognosis, TEA Domain Transcription Factors, Trans-Activators genetics, Transcription Factors genetics, Transcriptional Coactivator with PDZ-Binding Motif Proteins, Tumor Cells, Cultured, Xenograft Model Antitumor Assays, Apoptosis, Brain Neoplasms secondary, DNA-Binding Proteins metabolism, Epithelial-Mesenchymal Transition, Glioma pathology, Nuclear Proteins metabolism, Trans-Activators metabolism, Transcription Factors metabolism
- Abstract
Transcriptional coactivator with PDZ-binding motif (TAZ), a Hippo pathway downstream effector, promotes tumor progression by serving as a transcriptional coactivator with TEAD. Here, we introduced a new construct which can express the TEAD-binding domain of TAZ protein (TAZBD), and determined its antitumor effect in malignant glioma both in vitro and in vivo. We first observed that TAZ was upregulated in glioma tissues and related to malignant clinicopathologic characteristic, indicating the crucial role of TAZ during glioma progression. In U87 and U251 cells, TAZBD expression increased the proportion of apoptotic cells, and suppressed the colony formation and tumorigenicity. Further, TAZBD also decreased cell metastasis through the repression of epithelial-mesenchymal transition. The mechanistic study showed that TAZBD suppression of glioma cells was predominantly through blocking the TAZ-TEAD complex formation by competing with endogenous TAZ. Thus, the gene therapy of malignant glioma through blocking TAZ-TEAD complex by TAZBD may provide a new way for the targeted therapy of glioma., (© 2019 Wiley Periodicals, Inc.)
- Published
- 2019
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45. Glaciecola amylolytica sp. nov., an amylase-producing bacterium isolated from seawater.
- Author
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Xiao YK, Yan ZF, Kim Y, Lee HM, Trinh H, Yang JE, Won KH, Yi TH, and Kook M
- Subjects
- Alteromonadaceae isolation & purification, Amylases, Bacterial Typing Techniques, Base Composition, DNA, Bacterial genetics, Fatty Acids chemistry, Nucleic Acid Hybridization, Phospholipids chemistry, RNA, Ribosomal, 16S genetics, Republic of Korea, Sequence Analysis, DNA, Ubiquinone chemistry, Alteromonadaceae classification, Phylogeny, Seawater microbiology
- Abstract
A Gram-stain-negative, aerobic, non-motile and coccus-shaped bacterium (THG-3.7
T ) was isolated from seawater. Growth occurred at 10-30 °C (optimum 25 °C), at pH 6-8 (optimum 7) and in the presence of 1-8 % (w/v) NaCl (optimum 4 %). Based on 16S rRNA gene sequence analysis, the nearest phylogenetic neighbours of strain THG-3.7T were identified as Paraglaciecola mesophila DSM 15026T (95.3 % similarity), Glaciecola pallidula DSM 14239T (95.2 %), Paraglaciecola aquimarina KCTC 32108T (95.1 %), Paraglaciecola arctica KACC 14537T (94.9 %), Glaciecola nitratireducens KCTC 12276T (94.7 %) and Paraglaciecola psychrophila CGMCC 1.6130T (94.7 %). 16S rRNA gene sequence similarities among strain THG-3.7T and other species were lower than 94.7 %. The polar lipids were phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, one unidentified lipid and one unidentified aminolipid. The quinone system was composed of Q-8. The major fatty acids were C16 : 0, C18 : 1ω7c and summed feature 3 (C16 : 1ω7c and/or iso-C15 : 0 2-OH). The DNA G+C content of strain THG-3.7T was 47.9 mol%. On the basis of the data presented, strain THG-3.7T represents a novel species of the genus Glaciecola, for which the name Glaciecola amylolytica sp. nov. is proposed. The type strain is THG-3.7T (=KACC 19478T =CCTCC AB 2017258T ).- Published
- 2019
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46. Identification of sources and transformations of nitrate in the Xijiang River using nitrate isotopes and Bayesian model.
- Author
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Li C, Li SL, Yue FJ, Liu J, Zhong J, Yan ZF, Zhang RC, Wang ZJ, and Xu S
- Abstract
Coupled nitrogen and oxygen isotopes of nitrate have proven useful in identifying nitrate sources and transformation in rivers. However, isotopic fractionation and low-resolution monitoring limit the accurate estimation of nitrate dynamics. In the present study, the spatio-temporal variations of nitrate isotopes (
15 N and18 O) and hydrochemical compositions (NO3 - and Cl- ) of river water were examined to understand nitrate sources in the Xijiang River, China. High-frequency sampling campaigns and isotopic analysis were performed at the mouth of the Xijiang River to capture temporal nitrate variabilities. The overall values of δ15 N-NO3 - and δ18 O-NO3 - ranged from +4.4‰ to +14.1‰ and from -0.3‰ to +6.8‰, respectively. The results of nitrate isotopes indicated that NO3 - mainly originated from soil organic nitrogen (SON), chemical fertilizer (CF), and manure and sewage wastes (M&S). The negative correlation of nitrate isotopic values with NO3 - /Cl- ratios suggested the importance of denitrification in NO3 - loss. The results of Bayesian model with incorporation of isotopic fractionation during the denitrification showed that SON and CF contributed to the most (72-73%) nitrate in the wet season; whereas approximately 58% of nitrate was derived from anthropogenic inputs (M&S and CF) in the dry season. The nitrate flux was 2.08 × 105 tons N yr-1 during one hydrologic year between 2013 and 2014, with 86% occurring in the wet season. Long-term fluctuations in nitrate flux indicated that nitrate export increased significantly over the past 35 years, and was significantly correlated with nitrate concentrations. The seasonal pattern of nitrate dynamics indicated the mixing of nitrified NO3 - and denitrified NO3 - between surface flow and groundwater flow under different hydrological conditions. Overall, the present study quantitatively evaluates the spatio-temporal variations in nitrate sources in a subtropical watershed, and the high-frequency monitoring gives a better estimate of nitrate exports and proportional contributions of nitrate sources., (Copyright © 2018 Elsevier B.V. All rights reserved.)- Published
- 2019
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47. Scopulibacillus cellulosilyticus sp. nov., a cellulose-degrading bacterium isolated from tea.
- Author
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Yan ZF, Lin P, Li CT, Kook M, and Yi TH
- Subjects
- Bacteria classification, Bacteria genetics, Phenotype, Phylogeny, RNA, Ribosomal, 16S genetics, Bacteria metabolism, Cellulose metabolism, Tea microbiology
- Abstract
A Gram-stain positive, aerobic, non-motile, endospore-forming and rod-shaped strain (THG-NT9
T ) was isolated from a green tea sample. Growth occurred at 20-45 °C (optimum 28-35 °C), at pH 6.0-8.0 (optimum 7.0) and at 0-2.0% NaCl (optimum 0%). Based on 16S rRNA gene sequence analysis, the near phylogenetic neighbours of strain THG-NT9T were identified as Scopulibacillus daqui DSM 28236T (98.6%), Scopulibacillus darangshiensis DSM 19377T (97.4%), Pullulanibacillus pueri CGMCC 1.12777T (96.7%) and Pullulanibacillus camelliae CGMCC 1.15371T (96.3%). The DNA G + C content of strain THG-NT9T was determined to be 47.5 mol %. DNA-DNA hybridization values between strain THG-NT9T and S. daqui DSM 28236T , S. darangshiensis DSM 19377T , P. pueri CGMCC 1.12777T , P. camelliae CGMCC 1.15371T and Pullulanibacillus naganoensis DSM 10191T were 41.3 ± 0.1 (39.4 ± 0.4% reciprocal analysis), 39.1 ± 0.1 (37.3 ± 0.1%), 21.4 ± 0.7 (20.1 ± 0.3%), 20.7 ± 0.1 (20.1 ± 0.4%) and 12.1 ± 0.2% (8.3 ± 0.2%). The polar lipids were identified as diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and three unidentified lipids. The quinone was identified as MK-7. The major fatty acids were C18:3 ω7c, iso-C15:0 , iso-C16:0 , iso-C17:0 and anteiso-C17:0 . The cell wall type was determined to be A1γ peptidoglycan with meso-diaminopimelic acid as the diagnostic diamino acid plus alanine and glutamic acid and glucose as the cell wall sugar. On the basis of the phylogenetic analysis, chemotaxonomic data, physiological characteristics, and DNA-DNA hybridization data, strain THG-NT9T represents a novel species of the genus Scopulibacillus, for which the name Scopulibacillus cellulosilyticus sp. nov. is proposed. The type strain is THG-NT9T (= KCTC 33918T = CGMCC 1.16305T ).- Published
- 2018
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48. Combined alkali dissolution and re-assembly approach toward ZSM-5 mesostructures with extended lifetime in cumene cracking.
- Author
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Peng P, Sun SZ, Liu YX, Liu XM, Mintova S, and Yan ZF
- Abstract
The basis and contribution of mesopores created in ZSM-5 structures at different treatment conditions are systematically investigated. The results reveal that the mesopores originated from the alkali dissolution of pristine ZSM-5 are mainly intracrystalline and they contribute to excessive Brønsted acid sites, while the mesopores originated from the re-assembly of alkali dissolved aluminosilicate species possess Lewis acid sites. These ZSM-5 mesostructures showed an extended lifespan during the cracking of cumene (88.0%) in comparison to the pristine ZSM-5 (27.0%) after 460 min. The zeolite mesostructures obtained in this study could be used as a base for further design of new porous materials with desired acidic properties., (Copyright © 2018. Published by Elsevier Inc.)
- Published
- 2018
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49. Nibribacter flagellatus sp. nov., isolated from rhizosphere of Hibiscus syriacus and emended description of the genus Nibribacter.
- Author
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Lin P, Yan ZF, Li CT, Kook M, and Yi TH
- Subjects
- Bacteroidetes genetics, Base Composition, DNA, Bacterial, Genome, Bacterial, Molecular Typing, Phenotype, Phylogeny, RNA, Ribosomal, 16S genetics, Soil Microbiology, Bacteroidetes classification, Bacteroidetes isolation & purification, Hibiscus microbiology, Rhizosphere
- Abstract
A Gram-stain negative, aerobic, motile by flagella, rod-shaped strain (THG-T16
T ) was isolated from rhizosphere of Hibiscus syriacus. Growth occurred at 10-40 °C (optimum 28-30 °C), at pH 6.0-8.0 (optimum 7.0) and at 0-1.0% NaCl (optimum 0%). Based on 16S rRNA gene sequence analysis, the near phylogenetic neighbours of strain THG-T16T were identified as Nibribacter koreensis KACC 16450T (98.6%), Rufibacter roseus KCTC 42217T (94.7%), Rufibacter immobilis CCTCC AB 2013351T (94.5%) and Rufibacter tibetensis CCTCC AB 208084T (94.4%). The DNA G+C content of strain THG-T16T was determined to be 46.7 mol%. DNA-DNA hybridization values between strain THG-T16T and N. koreensis KACC 16450T , R. roseus KCTC 42217T , R. immobilis CCTCC AB 2013351T , R.tibetensis CCTCC AB 208084T were 33.5 ± 0.5% (31.7 ± 0.7% reciprocal analysis), 28.1 ± 0.2% (25.2 ± 0.2%), 17.1 ± 0.9% (10.2 ± 0.6%) and 8.1 ± 0.3% (5.2 ± 0.1%). The polar lipids were identified as phosphatidylethanolamine, two unidentified aminophospholipids, an unidentified aminolipid and three unidentified lipids. The quinone was identified as MK-7 and the polyamine as sym-homospermidine. The major fatty acids were identified as C16:1 ω5c, C17:1 ω6c, iso-C15:0 , summed feature 3 (C16:1 ω7c and/or C16:1 ω6c) and summed feature 4 (iso-C17:1 I and/or anteiso-C17:1 B). On the basis of the phylogenetic analysis, chemotaxonomic data, physiological characteristics, and DNA-DNA hybridization data, strain THG-T16T represents a novel species of the genus Nibribacter, for which the name Nibribacter flagellatus sp. nov. is proposed. The type strain is THG-T16T (= KACC 19188T = CCTCC AB 2016246T ).- Published
- 2018
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50. Inhibition of eIF4F complex loading inhibits the survival of malignant glioma.
- Author
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Dong QF, Yan ZF, Li PQ, Yang X, Huo JL, and Zhen HN
- Subjects
- Animals, Biomarkers, Tumor, Cell Cycle, Eukaryotic Initiation Factor-4F genetics, Eukaryotic Initiation Factor-4F metabolism, Glioma metabolism, Glioma pathology, Humans, Male, Mice, Mice, Inbred BALB C, Mice, Nude, Tumor Cells, Cultured, Xenograft Model Antitumor Assays, Apoptosis, Cell Proliferation, Eukaryotic Initiation Factor-4F antagonists & inhibitors, Glioma prevention & control
- Abstract
The eukaryotic initiation factor (eIF)4E‑binding proteins (4E‑BPs) regulate cap‑dependent protein translation and control the assembly of the eIF4F complex. In the present study, a phosphorylation‑deficient truncated 4E‑BP2 (eIF4FD) was constructed into the eukaryotic expression vector pSecTag2, and the in vitro and in vivo effects on malignant glioma survival were determined through inhibiting eIF4F complex assembly. Cell cycle distribution analysis and TUNEL staining show that overexpression of eIF4FD suppressed cell proliferation and induced apoptosis in U251 cells. Western blotting showed that the cell cycle‑related genes cyclin D1 and C‑myc, and anti‑apoptotic genes B‑cell lymphoma 2 (Bcl‑2), Bcl‑extra large and survivin were reduced following the overexpression of eIF4FD. Furthermore, eIF4FD suppressed glioma vascularization via reductions in the expression of β‑catenin and vascular endothelial growth factor. In the orthotopic xenograft model, the stable expression of eIF4FD in U251 cells attenuated cell growth and increased the rate of apoptosis. Accordingly, pSecTag2‑PTD‑eIF4FD injection via the tail vein of mice also lead to cell growth inhibition and the induction of apoptosis. Therefore, the study showed that phosphorylation‑deficient truncated 4E‑BP2 efficiently inhibited eIF4E and prevented the formation of the eIF4F complex, which further contributed to the inhibition of cell proliferation and vascularization, and the induction of apoptosis. Therefore, the 4E‑BP2‑based phosphorylation‑deficient truncation designed in the present study may represent a novel approach for the targeted therapy of human malignant glioma though inhibition of the translation initiation complex.
- Published
- 2018
- Full Text
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