66 results on '"Zhang FT"'
Search Results
2. Renal interstitial fibrotic assessment using non-Gaussian diffusion kurtosis imaging in a rat model of hyperuricemia.
- Author
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Chen PK, Cheng ZY, Wang YL, Xu BJ, Yu ZC, Li ZX, Gong SA, Zhang FT, Qian L, Cui W, Feng YZ, and Cai XR
- Subjects
- Rats, Animals, Kidney diagnostic imaging, Diffusion Tensor Imaging methods, Diffusion Magnetic Resonance Imaging methods, Fibrosis, Hyperuricemia diagnostic imaging
- Abstract
Background: To investigate the feasibility of Diffusion Kurtosis Imaging (DKI) in assessing renal interstitial fibrosis induced by hyperuricemia., Methods: A hyperuricemia rat model was established, and the rats were randomly split into the hyperuricemia (HUA), allopurinol (AP), and AP + empagliflozin (AP + EM) groups (n = 19 per group). Also, the normal rats were selected as controls (CON, n = 19). DKI was performed before treatment (baseline) and on days 1, 3, 5, 7, and 9 days after treatment. The DKI indicators, including mean kurtosis (MK), fractional anisotropy (FA), and mean diffusivity (MD) of the cortex (CO), outer stripe of the outer medulla (OS), and inner stripe of the outer medulla (IS) were acquired. Additionally, hematoxylin and eosin (H&E) staining, Masson trichrome staining, and nuclear factor kappa B (NF-κB) immunostaining were used to reveal renal histopathological changes at baseline, 1, 5, and 9 days after treatment., Results: The HUA, AP, and AP + EM group MK
OS and MKIS values gradually increased during this study. The HUA group exhibited the highest MK value in outer medulla. Except for the CON group, all the groups showed a decreasing trend in the FA and MD values of outer medulla. The HUA group exhibited the lowest FA and MD values. The MKOS and MKIS values were positively correlated with Masson's trichrome staining results (r = 0.687, P < 0.001 and r = 0.604, P = 0.001, respectively). The MDOS and FAIS were negatively correlated with Masson's trichrome staining (r = -626, P < 0.0014 and r = -0.468, P = 0.01, respectively)., Conclusion: DKI may be a non-invasive method for monitoring renal interstitial fibrosis induced by hyperuricemia., (© 2024. The Author(s).)- Published
- 2024
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3. Association between complete right bundle branch block and atrial fibrillation development.
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Zhang FT, Liu XJ, Zhao DQ, Wu JT, Zhang LM, Hu J, Fan XW, Yang HT, Yan LJ, Liu JJ, and Wang SL
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- Aged, Electrocardiography, Female, Humans, Male, Middle Aged, Retrospective Studies, Stroke Volume, Ventricular Function, Left, Atrial Fibrillation complications, Atrial Fibrillation epidemiology, Bundle-Branch Block complications, Bundle-Branch Block diagnosis, Bundle-Branch Block epidemiology
- Abstract
Background: Complete right bundle branch block (CRBBB) is an important predictor of atrial fibrillation (AF) recurrence after pulmonary vein isolation. However, the association between CRBBB and AF development remains unclear., Methods: We performed a retrospective study of 2639 patients (male, n = 1549; female, n = 1090; mean age, 58 ± 13 years). CRBBB was defined as a late R (R') wave in lead V
1 or V2 with a slurred S wave in lead I and/or lead V6 with a prolonged QRS duration (≥120 ms)., Results: Among the 2639 patients, CRBBB was detected in 40 patients (1.5%), and the prevalence of AF was 7.4% (196/2639). The proportion of patients with AF and CRBBB was higher than the proportion of patients with AF without CRBBB (22.5% vs. 7.2%; p = 0.001). In the forward multivariate logistic analysis, CRBBB (odds ratio [OR], 3.329; 95% confidence interval [CI], 1.350-8.211; p = 0.009), complete left bundle branch block (OR, 2.209; 95% CI, 1.238-3.940; p = 0.007), age (OR, 1.020; 95% CI, 1.005-1.035; p = 0.009), valvular heart disease (OR, 2.332; 95% CI, 1.531-3.552; p < 0.001), left atrial diameter (OR, 1.133; 95% CI, 1.104-1.163; p < 0.001), left ventricular ejection fraction (OR, 1.023; 95% CI, 1.006-1.041; p = 0.007), and class I or III anti-arrhythmic drug use (OR, 10.534; 95% CI, 7.090-15.651; p < 0.001) were associated with AF., Conclusion: Complete right bundle branch block was significantly associated with AF development in hospitalized patients with cardiovascular diseases., (© 2022 The Authors. Annals of Noninvasive Electrocardiology published by Wiley Periodicals LLC.)- Published
- 2022
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4. Rab2A regulates the progression of nonalcoholic fatty liver disease downstream of AMPK-TBC1D1 axis by stabilizing PPARγ.
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Chen ZY, Sun YT, Wang ZM, Hong J, Xu M, Zhang FT, Zhou XQ, Rong P, Wang Q, Wang HY, Wang H, Chen S, and Chen L
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- Aging, Animals, Gene Expression Regulation, Gene Knock-In Techniques, Hep G2 Cells, Humans, Lipid Metabolism physiology, Mice, Non-alcoholic Fatty Liver Disease metabolism, PPAR gamma genetics, PPAR gamma metabolism, rab GTP-Binding Proteins genetics, AMP-Activated Protein Kinases metabolism, GTPase-Activating Proteins metabolism, Non-alcoholic Fatty Liver Disease pathology, rab GTP-Binding Proteins metabolism
- Abstract
Nonalcoholic fatty liver disease (NAFLD) affects approximately a quarter of the population worldwide, and persistent overnutrition is one of the major causes. However, the underlying molecular basis has not been fully elucidated, and no specific drug has been approved for this disease. Here, we identify a regulatory mechanism that reveals a novel function of Rab2A in the progression of NAFLD based on energy status and PPARγ. The mechanistic analysis shows that nutrition repletion suppresses the phosphorylation of AMPK-TBC1D1 signaling, augments the level of GTP-bound Rab2A, and then increases the protein stability of PPARγ, which ultimately promotes the hepatic accumulation of lipids in vitro and in vivo. Furthermore, we found that blocking the AMPK-TBC1D1 pathway in TBC1D1S231A-knock-in (KI) mice led to a markedly increased GTP-bound Rab2A and subsequent fatty liver in aged mice. Our studies also showed that inhibition of Rab2A expression alleviated hepatic lipid deposition in western diet-induced obesity (DIO) mice by reducing the protein level of PPARγ and the expression of PPARγ target genes. Our findings not only reveal a new molecular mechanism regulating the progression of NAFLD during persistent overnutrition but also have potential implications for drug discovery to combat this disease., Competing Interests: The authors have declared that no competing interests exist.
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- 2022
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5. Comparative transcriptome and DNA methylation analysis in temperature-sensitive genic male sterile wheat BS366.
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Liu YJ, Li D, Gong J, Wang YB, Chen ZB, Pang BS, Chen XC, Gao JG, Yang WB, Zhang FT, Tang YM, Zhao CP, and Gao SQ
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- DNA Methylation, Pollen genetics, Temperature, Transcriptome, Triticum genetics
- Abstract
Background: Known as the prerequisite component for the heterosis breeding system, the male sterile line determines the hybrid yield and seed purity. Therefore, a deep understanding of the mechanism and gene network that leads to male sterility is crucial. BS366, a temperature-sensitive genic male sterile (TGMS) line, is male sterile under cold conditions (12 °C with 12 h of daylight) but fertile under normal temperature (20 °C with 12 h of daylight)., Results: During meiosis, BS366 was defective in forming tetrads and dyads due to the abnormal cell plate. During pollen development, unusual vacuolated pollen that could not accumulate starch grains at the binucleate stage was also observed. Transcriptome analysis revealed that genes involved in the meiotic process, such as sister chromatid segregation and microtubule-based movement, were repressed, while genes involved in DNA and histone methylation were induced in BS366 under cold conditions. MethylRAD was used for reduced DNA methylation sequencing of BS366 spikes under both cold and control conditions. The differentially methylated sites (DMSs) located in the gene region were mainly involved in carbohydrate and fatty acid metabolism, lipid metabolism, and transport. Differentially expressed and methylated genes were mainly involved in cell division., Conclusions: These results indicated that the methylation of genes involved in carbon metabolism or fatty acid metabolism might contribute to male sterility in BS366 spikes, providing novel insight into the molecular mechanism of wheat male sterility., (© 2021. The Author(s).)
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- 2021
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6. Effect of catheter ablation on clinical outcomes in patients with atrial fibrillation and significant functional mitral regurgitation.
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Wu JT, Zhao DQ, Zhang FT, Liu XJ, Hu J, Zhang LM, Fan XW, Yang HT, Yan LJ, Liu JJ, and Wang SL
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- Action Potentials, Aged, Anti-Arrhythmia Agents adverse effects, Atrial Fibrillation complications, Atrial Fibrillation diagnosis, Atrial Fibrillation physiopathology, Female, Heart Failure etiology, Heart Failure physiopathology, Heart Failure therapy, Heart Rate, Humans, Ischemic Attack, Transient etiology, Male, Middle Aged, Mitral Valve diagnostic imaging, Mitral Valve Insufficiency complications, Mitral Valve Insufficiency diagnostic imaging, Recovery of Function, Retrospective Studies, Severity of Illness Index, Stroke etiology, Time Factors, Treatment Outcome, Anti-Arrhythmia Agents therapeutic use, Atrial Fibrillation therapy, Catheter Ablation adverse effects, Mitral Valve physiopathology, Mitral Valve Insufficiency physiopathology
- Abstract
Background: In patients with atrial fibrillation (AF) and functional mitral regurgitation (MR), catheter ablation reduces the severity of MR and improves cardiac remodeling. However, its effects on prognosis are uncertain., Methods: This retrospective study included 151 consecutive patients with AF and functional MR, 82 (54.3%) of whom were treated by catheter ablation (Ablation group) and 69 (45.7%) with drug therapy without ablation (Non-ablation group). Forty-three pairs of these patients were propensity matched on the basis of age, CHA
2 DS2 -VASc scores, and left ventricular ejection fraction. The primary outcome evaluated was severity of MR, cardiac remodeling and the combined incidence of subsequent heart failure-related hospitalization and strokes/transient ischemic attacks., Results: Patients in the Ablation group showed a significant decrease in the severity of MR (p < 0.001), a significant decrease in the left atrial diameter (p = 0.010), and significant improvement in the left ventricular ejection fraction (p = 0.015). However, patients in the Non-ablation group showed only a significant decrease in the severity of MR (p = 0.004). The annual incidence of the studied events was 4.9% in the Ablation group and 16.7% in the Non-ablation group, the incidence being significantly lower in the ablation than Non-ablation group (p = 0.026) according to Kaplan-Meier curve analyses. According to multivariate Cox regression analysis, catheter ablation therapy (hazard ratio [HR] 0.27, 95% confidence interval [CI] 0.09-0.84; p = 0.024) and heart failure at baseline (HR 3.84, 95% CI 1.07-13.74; p = 0.038) were independent predictors of the incidence of the studied events., Conclusions: Among patients with AF and functional MR, catheter ablation was associated with a significantly lower combined risk of heart failure-related hospitalization and stroke than in a matched cohort of patients receiving drug therapy alone., (© 2021. The Author(s).)- Published
- 2021
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7. Comprehensive analysis of formin gene family highlights candidate genes related to pollen cytoskeleton and male fertility in wheat (Triticum aestivum L.).
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Duan WJ, Liu ZH, Bai JF, Yuan SH, Li YM, Lu FK, Zhang TB, Sun JH, Zhang FT, Zhao CP, and Zhang LP
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- Cytoskeleton metabolism, Fertility genetics, Formins, Gene Expression Regulation, Plant, Microtubules metabolism, Plant Proteins genetics, Plant Proteins metabolism, Pollen genetics, Pollen metabolism, Plant Breeding, Triticum genetics, Triticum metabolism
- Abstract
Background: Formin, a highly conserved multi-domain protein, interacts with microfilaments and microtubules. Although specifically expressed formin genes in anthers are potentially significant in research on male sterility and hybrid wheat breeding, similar reports in wheat, especially in thermo-sensitive genic male sterile (TGMS) wheat, remain elusive., Results: Herein, we systematically characterized the formin genes in TGMS wheat line BS366 named TaFormins (TaFHs) and predicted their functions in inducing stress response. In total, 25 TaFH genes were uncovered, majorly localized in 2A, 2B, and 2D chromosomes. According to the neighbor-joining (NJ) method, all TaFH proteins from wheat and other plants clustered in 6 sub-groups (A-F). The modeled 3D structures of TaFH1-A/B, TaFH2-A/B, TaFH3-A/B and TaFH3-B/D were validated. And different numbers of stress and hormone-responsive regulatory elements in their 1500 base pair promoter regions were contained in the TaFH genes copies. TaFHs had specific temporal and spatial expression characteristics, whereby TaFH1, TaFH4, and TaFH5 were expressed highly in the stamen of BS366. Besides, the accumulation of TaFHs was remarkably lower in a low-temperature sterile condition (Nanyang) than fertile condition (Beijing), particularly at the early stamen development stage. The pollen cytoskeleton of BS366 was abnormal in the three stages under sterile and fertile environments. Furthermore, under different stress levels, TaFHs expression could be induced by drought, salt, abscisic acid (ABA), salicylic acid (SA), methyl jasmonate (MeJA), indole-3-acetic acid (IAA), polyethylene glycol (PEG), and low temperature. Some miRNAs, including miR167, miR1120, and miR172, interacts with TaFH genes; thus, we constructed an interaction network between microRNAs, TaFHs, phytohormone responses, and distribution of cytoskeleton to reveal the regulatory association between upstream genes of TaFH family members and sterile., Conclusions: Collectively, this comprehensive analysis provides novel insights into TaFHs and miRNA resources for wheat breeding. These findings are, therefore, valuable in understanding the mechanism of TGMS fertility conversion in wheat., (© 2021. The Author(s).)
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- 2021
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8. Genome-wide association study of fleece traits in Inner Mongolia Cashmere goats.
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Wang FH, Zhang L, Gong G, Yan XC, Zhang LT, Zhang FT, Liu HF, Lv Q, Wang ZY, Wang RJ, Zhang YJ, Wang ZX, Liu ZH, He LB, Su R, Zhao YH, and Li JQ
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- Animals, China, Gene Ontology, Polymorphism, Single Nucleotide, Genome-Wide Association Study veterinary, Goats genetics, Hair
- Abstract
Inner Mongolia Cashmere goat is a well-known local cashmere goat breed in China. It is famous for excellent fleece quality and a significant advantage in cashmere yield compared to other cashmere goat breeds. In this study, a genome-wide association study was used to investigate fiber length, fiber diameter, and cashmere yield of 192 Inner Mongolia Cashmere goats using the Illumina GoatSNP52K Beadchip panel. We discovered that four single nucleotide polymorphisms (SNPs) reached genome-wide significance levels. These SNPs were located in some genes, e.g. FGF12, SEMA3D, EVPL, and SOX5, possibly related to fleece traits in Inner Mongolia Cashmere goat. Gene ontology enrichment analysis revealed that these genes were enriched in several biological pathways that were involved in hair follicle development in cashmere goats. In summary, the identified significant SNPs and genes provide useful information to explore genetic mechanisms underlying the variation in fleece traits and genomic selection of Chinese cashmere goat., (© 2021 The Authors. Animal Genetics published by John Wiley & Sons Ltd on behalf of Stichting International Foundation for Animal Genetics.)
- Published
- 2021
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9. Genome-wide identification and transcriptional characterization of DNA methyltransferases conferring temperature-sensitive male sterility in wheat.
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Li D, Feng BE, Liu YJ, Gong J, Tang YM, Zhang LP, Pang BS, Sun RW, Zhang FT, Chen ZB, Wang YB, Chen XC, Wang AP, Zhao CP, and Gao SQ
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- DNA, DNA Methylation, Gene Expression Regulation, Plant, Humans, Male, Methyltransferases, Plant Infertility genetics, Plant Proteins genetics, Plant Proteins metabolism, Temperature, Infertility, Male, Triticum genetics, Triticum metabolism
- Abstract
Background: DNA methyltransferase (DMT) genes contribute to plant stress responses and development by de novo establishment and subsequent maintenance of DNA methylation during replication. The photoperiod and/or temperature-sensitive genic male sterile (P/TGMS) lines play an important role in hybrid seed production of wheat. However, only a few studies have reported on the effect of DMT genes on temperature-sensitive male sterility of wheat. Although DMT genes have been investigated in some plant species, the identification and analysis of DMT genes in wheat (Triticum aestivum L.) based on genome-wide levels have not been reported., Results: In this study, a detailed overview of phylogeny of 52 wheat DMT (TaDMT) genes was presented. Homoeolog retention for TaDMT genes was significantly above the average retention rate for whole-wheat genes, indicating the functional importance of many DMT homoeologs. We found that the strikingly high number of TaDMT genes resulted mainly from the significant expansion of the TaDRM subfamily. Intriguingly, all 5 paralogs belonged to the wheat DRM subfamily, and we speculated that tandem duplications might play a crucial role in the TaDRM subfamily expansion. Through the transcriptional analysis of TaDMT genes in a TGMS line BS366 and its hybrids with the other six fertile lines under sterile and fertile conditions, we concluded that TaCMT-D2, TaMET1-B1, and TaDRM-U6 might be involved in male sterility in BS366. Furthermore, a correlation analysis showed that TaMET1-B1 might negatively regulate the expression of TaRAFTIN1A, an important gene for pollen development, so we speculated regarding an epigenetic regulatory mechanism underlying the male sterility of BS366 via the interaction between TaMET1-B1 and TaRAFTIN1A., Conclusions: Our findings presented a detailed phylogenic overview of the DMT genes and could provide novel insights into the effects of DMT genes on TGMS wheat.
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- 2021
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10. Antithrombotic Agents for tPA-Induced Cerebral Hemorrhage: A Systematic Review and Meta-Analysis of Preclinical Studies.
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Ye Y, Zhang FT, Wang XY, Tong HX, and Zhu YT
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- Animals, Case-Control Studies, Cerebral Hemorrhage drug therapy, Disease Models, Animal, Fibrinolytic Agents administration & dosage, Male, Mental Status and Dementia Tests statistics & numerical data, Mice, Platelet Aggregation Inhibitors administration & dosage, Platelet Aggregation Inhibitors therapeutic use, Rabbits, Rats, Tissue Plasminogen Activator drug effects, Treatment Outcome, Cerebral Hemorrhage chemically induced, Fibrinolytic Agents pharmacology, Ischemic Stroke drug therapy, Tissue Plasminogen Activator adverse effects
- Abstract
Background tPA (tissue-type plasminogen activator) remains the only approved drug for acute ischemic stroke, with a potentially serious adverse effect: hemorrhagic transformation. The effects of antithrombotic agents on tPA-induced hemorrhagic transformation after ischemic stroke are not clearly defined. We performed a systematic review and meta-analysis in preclinical studies aiming to evaluate the efficacy of antithrombotic agents on tPA-induced hemorrhagic transformation after ischemic stroke. Methods and Results We conducted a systematic review and meta-analysis of studies testing antithrombotic agents in animal models of tPA-induced hemorrhagic transformation. The pooled effects were calculated using random-effects models, and heterogeneity was explored through meta-regression and subgroup analyses. Publication bias was assessed using trim and fill method and the Egger test. The efficacy of 18 distinct interventions was described in 22 publications. The pooled data showed a significant improvement in cerebral hemorrhage, infarct size, and neurobehavioral outcome in treated compared with control animals (standardized mean difference, 0.45 [95% CI, 0.11-0.78]; standardized mean difference, 1.18 [95% CI, 0.73-1.64]; and standardized mean difference, 0.91 [95% CI, 0.49-1.32], respectively). Subgroup analysis indicated that quality score, random allocation, control of temperature, anesthetic used, stroke model used, route of drug delivery, time of drug administration, and time of assessment were significant factors that influenced the effects of interventions. Conclusions Administration with antiplatelet agents revealed statistically significant improvement in all the outcomes. Anticoagulant agents showed significant effects in infarct size and neurobehavioral score, but fibrinolytic agents did not show any significant improvement in all the outcomes. The conclusions should be interpreted cautiously given the heterogeneity and publication bias identified in this analysis.
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- 2020
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11. Genetic diversity and reproductive success of a wild population of Chinese sturgeon ( Acipenser sinensis ) from the Yangtze River inferred from juveniles born in 2014.
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Shen ZY, Yu D, Gao X, Zhang FT, and Liu HZ
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- Animals, China, Conservation of Natural Resources, Female, Fishes genetics, Male, Microsatellite Repeats, Rivers, Fishes physiology, Genetic Variation, Reproduction
- Abstract
The Chinese sturgeon ( Acipenser sinensis Gray, 1835) is a large anadromous fish species, which is under considerable threat due to dramatic declines in population numbers. In the current study, population genetic diversity and individual reproductive success were assessed using nuclear microsatellite markers (simple sequence repeat, SSR) and complete mitochondrial (mtDNA) genome analysis of juveniles born in 2014. Results showed the existence of size polymorphism in the mtDNA genome of Chinese sturgeon, which was caused by a repeat motif. Population genetic diversity was high based on both SSR ( Ho : 0.728±0.211; He : 0.779±0.122) and mtDNA genome analyses ( H : 0.876±0.0035; Pi : 0.0011±0.0010). A positive inbreeding coefficient ( FIS : 0.066±0.143) was also found, indicating the occurrence of inbreeding. Reconstruction of sibling groups identified 11 mothers and 11 fathers involved in reproduction of Chinese sturgeons in 2014. Variance in individual reproductive success was not significant, with reproductive success of parent fish instead shown to be relatively even ( P =0.997>0.05), thus suggesting the absence of sweepstakes reproductive success (SRS). These results indicate that, in regard to conservation, loss of genetic diversity due to the effects of SRS is not of particular concern. However, we must focus on having an adequate number of adults and suitable environmental conditions to ensure that fish can reproduce.
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- 2020
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12. Genomic identification and characterization of MYC family genes in wheat (Triticum aestivum L.).
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Bai JF, Wang YK, Guo LP, Guo XM, Guo HY, Yuan SH, Duan WJ, Liu Z, Zhao CP, Zhang FT, and Zhang LP
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- Alleles, Chromosome Mapping, Gene Expression Regulation, Plant, Organ Specificity, Phylogeny, Plant Proteins genetics, Regulatory Sequences, Nucleic Acid, Stress, Physiological genetics, Triticum classification, Genes, myc, Genome, Plant, Genomics methods, Multigene Family, Triticum genetics
- Abstract
Background: MYC transcriptional factors are members of the bHLH (basic helix-loop-helix) superfamily, and play important roles in plant growth and development. Recent studies have revealed that some MYCs are involved in the crosstalk between Jasmonic acid regulatory pathway and light signaling in Arabidopsis, but such kinds of studies are rare in wheat, especially in photo-thermo-sensitive genic male sterile (PTGMS) wheat line., Results: 27 non-redundant MYC gene copies, which belonged to 11 TaMYC genes, were identified in the whole genome of wheat (Chinese Spring). These gene copies were distributed on 13 different chromosomes, respectively. Based on the results of phylogenetic analysis, 27 TaMYC gene copies were clustered into group I, group III, and group IV. The identified TaMYC genes copies contained different numbers of light, stress, and hormone-responsive regulatory elements in their 1500 base pair promoter regions. Besides, we found that TaMYC3 was expressed highly in stem, TaMYC5 and TaMYC9 were expressed specially in glume, and the rest of TaMYC genes were expressed in all tissues (root, stem, leaf, pistil, stamen, and glume) of the PTGMS line BS366. Moreover, we found that TaMYC3, TaMYC7, TaMYC9, and TaMYC10 were highly sensitive to methyl jasmonate (MeJA), and other TaMYC genes responded at different levels. Furthermore, we confirmed the expression profiles of TaMYC family members under different light quality and plant hormone stimuli, and abiotic stresses. Finally, we predicted the wheat microRNAs that could interact with TaMYC family members, and built up a network to show their integrative relationships., Conclusions: This study analyzed the size and composition of the MYC gene family in wheat, and investigated stress-responsive and light quality induced expression profiles of each TaMYC gene in the PTGMS wheat line BS366. In conclusion, we obtained lots of important information of TaMYC family, and the results of this study was supposed to contribute novel insights and gene and microRNA resources for wheat breeding, especially for the improvement of PTGMS wheat lines.
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- 2019
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13. Genome-wide identification and analysis of the COI gene family in wheat (Triticum aestivum L.).
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Bai JF, Wang YK, Wang P, Yuan SH, Gao JG, Duan WJ, Wang N, Zhang FT, Zhang WJ, Qin MY, Zhao CP, and Zhang LP
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- Cyclopentanes metabolism, Gene Expression Profiling, Genome, Plant genetics, Organ Specificity, Oxylipins metabolism, Phylogeny, Promoter Regions, Genetic genetics, Signal Transduction genetics, Triticum cytology, Genomics, Triticum enzymology, Triticum genetics, Ubiquitin-Protein Ligases genetics
- Abstract
Background: COI (CORONATINE INSENSITIVE), an F-box component of the Skp1-Cullin-F-box protein (SCF
COI1 ) ubiquitin E3 ligase, plays important roles in the regulation of plant growth and development. Recent studies have shown that COIs are involved in pollen fertility. In this study, we identified and characterized COI genes in the wheat genome and analyzed expression patterns under abiotic stress., Results: A total of 18 COI candidate sequences for 8 members of COI gene family were isolated in wheat (Triticum aestivum L.). Phylogenetic and structural analyses showed that these COI genes could be divided into seven distinct subfamilies. The COI genes showed high expression in stamens and glumes. The qRT-PCR results revealed that wheat COIs were involved in several abiotic stress responses and anther/glume dehiscence in the photoperiod-temperature sensitive genic male sterile (PTGMS) wheat line BS366., Conclusions: The structural characteristics and expression patterns of the COI gene family in wheat as well as the stress-responsive and differential tissue-specific expression profiles of each TaCOI gene were examined in PTGMS wheat line BS366. In addition, we examined SA- and MeJA-induced gene expression in the wheat anther and glume to investigate the role of COI in the JA signaling pathway, involved in the regulation of abnormal anther dehiscence in the PTGMS wheat line. The results of this study contribute novel and detailed information about the TaCOI gene family in wheat and could be used as a benchmark for future studies of the molecular mechanisms of PTGMS in other crops.- Published
- 2018
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14. Transcriptome analysis of wheat seedling and spike tissues in the hybrid Jingmai 8 uncovered genes involved in heterosis.
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Liu YJ, Gao SQ, Tang YM, Gong J, Zhang X, Wang YB, Zhang LP, Sun RW, Zhang Q, Chen ZB, Wang X, Guo CJ, Zhang SQ, Zhang FT, Gao JG, Sun H, Yang WB, Wang WW, and Zhao CP
- Subjects
- Gene Expression Profiling, Gene Ontology, Inbreeding, Inflorescence genetics, Inflorescence physiology, Photosynthesis, Seedlings genetics, Seedlings physiology, Sequence Analysis, RNA, Triticum physiology, Gene Expression Regulation, Plant, Hybrid Vigor genetics, Transcriptome, Triticum genetics
- Abstract
Main Conclusion: Transcriptome analysis was carried out for wheat seedlings and spikes from hybrid Jingmai 8 and both inbred lines to unravel mechanisms underlying heterosis. Heterosis, known as one of the most successful strategies for increasing crop yield, has been widely exploited in plant breeding systems. Despite its great importance, the molecular mechanism underlying heterosis remains elusive. In the present study, RNA sequencing (RNA-seq) was performed on the seedling and spike tissues of the wheat (Triticum aestivum) hybrid Jingmai 8 (JM8) and its homozygous parents to unravel the underlying mechanisms of wheat heterosis. In total, 1686 and 2334 genes were identified as differentially expressed genes (DEGs) between the hybrid and the two inbred lines in seedling and spike tissues, respectively. Gene Ontology analysis revealed that DEGs from seedling tissues were significantly enriched in processes involved in photosynthesis and carbon fixation, and the majority of these DEGs expressed at a higher level in JM8 compared to both inbred lines. In addition, cell wall biogenesis and protein biosynthesis-related pathways were also significantly represented. These results confirmed that a combination of different pathways could contribute to heterosis. The DEGs between the hybrid and the two inbred progenitors from the spike tissues were significantly enriched in biological processes related to transcription, RNA biosynthesis and molecular function categories related to transcription factor activities. Furthermore, transcription factors such as NAC, ERF, and TIF-IIA were highly expressed in the hybrid JM8. These results may provide valuable insights into the molecular mechanisms underlying wheat heterosis.
- Published
- 2018
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15. Role of glutamine in the mediation of E-cadherin, p120-catenin and inflammation in ventilator-induced lung injury.
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Qiu JL, Song BL, Wang YJ, Zhang FT, and Wang YL
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- Animals, Catenins metabolism, Inflammation metabolism, Interleukin-6 metabolism, Lung pathology, Mice, Mice, Inbred C57BL, Ventilator-Induced Lung Injury immunology, Delta Catenin, Cadherins metabolism, Glutamine metabolism, Lung metabolism, Ventilator-Induced Lung Injury metabolism
- Abstract
Background: Ventilator-induced lung injury (VILI) is commonly associated with barrier dysfunction and inflammation reaction. Glutamine could ameliorate VILI, but its role has not been fully elucidated. This study examined the relationship between inflammatory cytokines (interleukin [IL]-6, tumor necrosis factor [TNF]-α, and IL-10) and adherens junctions (E-cadherin, p120-catenin), which were ameliorated by glutamine in VILI, both in vitro and in vivo., Methods: For the in vivo study, 30 healthy C57BL/6 mice weighing 25-30 g were randomly divided into five groups with random number table (n = 6 in each group): control (Group C); low tidal volume (Group L); low tidal volume + glutamine (Group L + G); high tidal volume (Group H); and high tidal volume + glutamine (Group H + G). Mice in all groups, except Group C, underwent mechanical ventilation for 4 h. For the in vitro study, mouse lung epithelial 12 (MLE-12) cells pretreated with glutamine underwent cyclic stretching at 20% for 4 h. Cell lysate and lung tissue were obtained to detect the junction proteins, inflammatory cytokines, and lung pathological changes by the Western blotting, cytokine assay, hematoxylin and eosin staining, and immunofluorescence., Results: In vivo, compared with Group C, total cell counts (t = -28.182, P < 0.01), the percentage of neutrophils (t = -28.095, P < 0.01), IL-6 (t = -28.296, P < 0.01), and TNF-α (t = -19.812, P < 0.01) in bronchoalveolar lavage (BAL) fluid, lung injury scores (t = -6.708, P < 0.01), and the wet-to-dry ratio (t = -15.595, P < 0.01) were increased in Group H; IL-10 in BAL fluid (t = 9.093, P < 0.01) and the expression of E-cadherin (t = 10.044, P < 0.01) and p120-catenin (t = 13.218, P < 0.01) were decreased in Group H. Compared with Group H, total cell counts (t = 14.844, P < 0.01), the percentage of neutrophils (t = 18.077, P < 0.01), IL-6 (t = 18.007, P < 0.01), and TNF-α (t = 10.171, P < 0.01) in BAL fluid were decreased in Group H + G; IL-10 in BAL fluid (t = -7.531, P < 0.01) and the expression of E-cadherin (t = -14.814, P < 0.01) and p120-catenin (t = -9.114, P < 0.01) were increased in Group H + G. In vitro, compared with the nonstretching group, the levels of IL-6 (t = -21.111, P < 0.01) and TNF-α (t = -15.270, P < 0.01) were increased in the 20% cyclic stretching group; the levels of IL-10 (t = 5.450, P < 0.01) and the expression of E-cadherin (t = 17.736, P < 0.01) and p120-catenin (t = 16.136, P < 0.01) were decreased in the 20% cyclic stretching group. Compared with the stretching group, the levels of IL-6 (t = 11.818, P < 0.01) and TNF-α (t = 8.631, P < 0.01) decreased in the glutamine group; the levels of IL-10 (t = -3.203, P < 0.05) and the expression of E-cadherin (t = -13.567, P < 0.01) and p120-catenin (t = -10.013, P < 0.01) were increased in the glutamine group., Conclusions: High tidal volume mechanical ventilation and 20% cyclic stretching could cause VILI. Glutamine regulates VILI by improving cytokines and increasing the adherens junctions, protein E-cadherin and p120-catenin, to enhance the epithelial barrier function., Competing Interests: The authors declare that they have no competing interests
- Published
- 2018
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16. Transcriptome analysis of phosphorus stress responsiveness in the seedlings of Dongxiang wild rice (Oryza rufipogon Griff.).
- Author
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Deng QW, Luo XD, Chen YL, Zhou Y, Zhang FT, Hu BL, and Xie JK
- Subjects
- Down-Regulation, Gene Expression Regulation, Plant, Oryza drug effects, Oryza physiology, Phosphorus pharmacology, Seedlings drug effects, Seedlings physiology, Stress, Physiological drug effects, Gene Expression Profiling, Oryza genetics, Phosphorus deficiency, Seedlings genetics, Stress, Physiological genetics
- Abstract
Background: Low phosphorus availability is a major factor restricting rice growth. Dongxiang wild rice (Oryza rufipogon Griff.) has many useful genes lacking in cultivated rice, including stress resistance to phosphorus deficiency, cold, salt and drought, which is considered to be a precious germplasm resource for rice breeding. However, the molecular mechanism of regulation of phosphorus deficiency tolerance is not clear., Results: In this study, cDNA libraries were constructed from the leaf and root tissues of phosphorus stressed and untreated Dongxiang wild rice seedlings, and transcriptome sequencing was performed with the goal of elucidating the molecular mechanisms involved in phosphorus stress response. The results indicated that 1184 transcripts were differentially expressed in the leaves (323 up-regulated and 861 down-regulated) and 986 transcripts were differentially expressed in the roots (756 up-regulated and 230 down-regulated). 43 genes were up-regulated both in leaves and roots, 38 genes were up-regulated in roots but down-regulated in leaves, and only 2 genes were down-regulated in roots but up-regulated in leaves. Among these differentially expressed genes, the detection of many transcription factors and functional genes demonstrated that multiple regulatory pathways were involved in phosphorus deficiency tolerance. Meanwhile, the differentially expressed genes were also annotated with gene ontology terms and key pathways via functional classification and Kyoto Encyclopedia of Gene and Genomes pathway mapping, respectively. A set of the most important candidate genes was then identified by combining the differentially expressed genes found in the present study with previously identified phosphorus deficiency tolerance quantitative trait loci., Conclusion: The present work provides abundant genomic information for functional dissection of the phosphorus deficiency resistance of Dongxiang wild rice, which will be help to understand the biological regulatory mechanisms of phosphorus deficiency tolerance in Dongxiang wild rice.
- Published
- 2018
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17. Electroless Deposition Metals on Poly(dimethylsiloxane) with Strong Adhesion As Flexible and Stretchable Conductive Materials.
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Zhang FT, Xu L, Chen JH, Zhao B, Fu XZ, Sun R, Chen Q, and Wong CP
- Abstract
A new surface modification method is developed for electroless deposition of robust metal (copper, nickel, silver) layers on poly(dimethylsiloxane) (PDMS) substrate with strong adhesion. Under the synergies of the polydopamine (PDA), the plasma process enhances Ag
+ reduction, and a thin Ag film is capable of tightly attaching to the PDMS surface, which catalyzes electroless deposition (ELD) to form robust metal layers on the PDMS surface with strong adhesion. Subsequently, a flexible and stretchable Cu-PDMS conductor is obtained through this method, showing excellent metallic conductivity of 1.2 × 107 S m-1 , even at the longest stretch strain (700%). This process provides a successful strategy for obtaining good robust metal layers on PDMS and other polymer substrate surfaces with strong adhesion and conductivity.- Published
- 2018
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18. Uncovering Male Fertility Transition Responsive miRNA in a Wheat Photo-Thermosensitive Genic Male Sterile Line by Deep Sequencing and Degradome Analysis.
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Bai JF, Wang YK, Wang P, Duan WJ, Yuan SH, Sun H, Yuan GL, Ma JX, Wang N, Zhang FT, Zhang LP, and Zhao CP
- Abstract
MicroRNAs (miRNAs) are endogenous small RNAs which play important negative regulatory roles at both the transcriptional and post-transcriptional levels in plants. Wheat is the most commonly cultivated plant species worldwide. In this study, RNA-seq analysis was used to examine the expression profiles of miRNA in the spikelets of photo-thermosenisitive genic male sterile (PTGMS) wheat line BS366 during male fertility transition. Through mapping on their corresponding precursors, 917-7,762 novel miRNAs were found in six libraries. Six novel miRNAs were selected for examination of their secondary structures and confirmation by stem-loop RT-PCR. In a differential expression analysis, 20, 22, and 58 known miRNAs exhibited significant differential expression between developmental stages 1 (secondary sporogenous cells had formed), 2 (all cells layers were present and mitosis had ceased), and 3 (meiotic division stage), respectively, of fertile and sterile plants. Some of these differential expressed miRNAs, such as tae-miR156, tae-miR164, tae-miR171, and tae-miR172, were shown to be associated with their targets. These targets were previously reported to be related to pollen development and/or male sterility, indicating that these miRNAs and their targets may be involved in the regulation of male fertility transition in the PTGMS wheat line BS366. Furthermore, target genes of miRNA cleavage sites were validated by degradome sequencing. In this study, a possible signal model for the miRNA-mediated signaling pathway during the process of male fertility transition in the PTGMS wheat line BS366 was developed. This study provides a new perspective for understanding the roles of miRNAs in male fertility in PTGMS lines of wheat.
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- 2017
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19. Investigation of the interactions between methylene blue and intramolecular G-quadruplexes: an explicit distinction in electrochemical behavior.
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Cao T, Zhang FT, Cai LY, Zhou YL, Buurma NJ, and Zhang XX
- Subjects
- Biosensing Techniques, Calorimetry, Circular Dichroism, Electrochemical Techniques, Humans, Molecular Docking Simulation, Telomerase chemistry, G-Quadruplexes, Methylene Blue chemistry
- Abstract
G-quadruplex sequences exist in eukaryotic organisms and prokaryotes, and the investigation of the interactions between G-quadruplexes and small molecule ligands is important for gene therapy, biosensor fabrication, fluorescence imaging and so on. Here, we investigated the behaviour of methylene blue (MB), an electroactive molecule, in the presence of different intramolecular G-quadruplexes by an electrochemical method using a miniaturized electrochemical device based on its intrinsic electrochemical properties. Although the effects of MB on different intramolecular G-quadruplex structures are not obvious by circular dichroism spectroscopy, distinct differences in the binding affinities of MB with different intramolecular G-quadruplexes were quickly and easily observed by an electrochemical technique. At the same time, for the human telomerase G-rich sequence (HT), the diffusion current of MB changed sensitively under different ionic conditions due to the formation of different conformations of HT, which indicated that our electrochemical method has the potential to study the influence of metal ions on the conformations of the G-quadruplexes with simplicity, rapid response and low cost. From all these, a new stacking mechanism and rule were obtained, which were also validated by docking studies and isothermal titration calorimetry (ITC).
- Published
- 2017
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20. Mapping QTLs for Fertility Restoration of Different Cytoplasmic Male Sterility Types in Rice Using Two Oryza sativa ×O. rufipogon Backcross Inbred Line Populations.
- Author
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Hu BL, Xie JK, Wan Y, Zhang JW, Zhang FT, and Li X
- Subjects
- Chromosome Mapping, Chromosomes, Plant genetics, Fertility, Genetics, Population, Phenotype, Crosses, Genetic, Cytoplasm genetics, Inbreeding, Oryza genetics, Plant Infertility genetics, Quantitative Trait Loci genetics
- Abstract
Hybrid rice breeding using cytoplasmic male sterility/fertility restoration (CMS/ Rf ) systems plays an important role in ensuring global food security. Two backcross inbred line (BIL) populations derived from either Xieqingzao B (XB)//XB/Dongxiang wild rice (DWR) (XXD) or XB//DWR/XB (XDX) were used to detect quantitative trait loci (QTLs) for fertility restoration of Dwarf wild abortive- (DA-), Indonesia Paddy- (ID-), and DWR-type CMS in rice. Lines with ID- and DA-type CMS were testcrossed with both the XXD- and XDX-BILs, while the line with DWR-type CMS was testcrossed with the XDX-BILs only. A total of 16 QTLs for fertility restoration of CMS systems were identified, including three for DWR-type CMS, six for DA-type CMS, and seven for ID-type CMS. All of the additive alleles in the QTLs were derived from Oryza rufipogon . Eleven QTLs were clustered in five chromosomal regions, indicating that common Rf loci restored different CMS systems, and the favorable O . rufipogon alleles could be used to develop restorer lines for various CMS types by marker-assisted selection.
- Published
- 2016
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21. Mixed Linear Model Approaches of Association Mapping for Complex Traits Based on Omics Variants.
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Zhang FT, Zhu ZH, Tong XR, Zhu ZX, Qi T, and Zhu J
- Subjects
- Animals, Epistasis, Genetic physiology, Mice, Chromosome Mapping, Gene-Environment Interaction, Genomics, Metabolomics, Models, Genetic, Quantitative Trait, Heritable
- Abstract
Precise prediction for genetic architecture of complex traits is impeded by the limited understanding on genetic effects of complex traits, especially on gene-by-gene (GxG) and gene-by-environment (GxE) interaction. In the past decades, an explosion of high throughput technologies enables omics studies at multiple levels (such as genomics, transcriptomics, proteomics, and metabolomics). The analyses of large omics data, especially two-loci interaction analysis, are very time intensive. Integrating the diverse omics data and environmental effects in the analyses also remain challenges. We proposed mixed linear model approaches using GPU (Graphic Processing Unit) computation to simultaneously dissect various genetic effects. Analyses can be performed for estimating genetic main effects, GxG epistasis effects, and GxE environment interaction effects on large-scale omics data for complex traits, and for estimating heritability of specific genetic effects. Both mouse data analyses and Monte Carlo simulations demonstrated that genetic effects and environment interaction effects could be unbiasedly estimated with high statistical power by using the proposed approaches.
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- 2015
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22. Postnatal high-protein diet improves learning and memory in premature rats via activation of mTOR signaling.
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Su ZW, Liao JY, Zhang H, Zhang T, Wu F, Tian XH, Zhang FT, Sun WW, and Cui QL
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- Animals, Animals, Newborn, Hippocampus metabolism, Maze Learning physiology, Rats, Rats, Sprague-Dawley, TOR Serine-Threonine Kinases metabolism, Dietary Proteins administration & dosage, Signal Transduction, Spatial Learning physiology, Spatial Memory physiology
- Abstract
Purpose: The present study investigated whether a high-protein diet affects spatial learning and memory in premature rats via modulation of mammalian target of rapamycin (mTOR) signaling., Methods: Pre- and full-term Sprague-Dawley pups were fed a normal (18% protein) or high-protein (30% protein) diet (HPD) for 6 or 8 weeks after weaning. Spatial learning and memory were tested in the Morris water maze at week 6 and 8. The activation of mTOR signaling pathway components was evaluated by western blotting., Results: Spatial memory performance of premature rats consuming a normal and HPD was lower than that of full-term rats on the same diet at 6 weeks, and was associated with lower levels of ribosomal protein S6 kinase p70 subtype (p70S6K) and initiation factor 4E-binding protein 1 (4EBP1) phosphorylation in the hippocampus. Spatial memory was improved in 8-week-old premature rats on an HPD as compared to those on a normal diet. Premature rats on an HPD had p70S6K and 4EBP1 phosphorylation levels in the hippocampus that were comparable to those of full-term rats on an HPD., Conclusion: Long-term consumption of a protein-rich diet can restore the impairment in learning and memory in pre-term rats via upregulation of mTOR/p70S6K signaling., (Copyright © 2015 Elsevier B.V. All rights reserved.)
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- 2015
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23. Portable, Easy-to-Operate, and Antifouling Microcapsule Array Chips Fabricated by 3D Ice Printing for Visual Target Detection.
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Zhang HZ, Zhang FT, Zhang XH, Huang D, Zhou YL, Li ZH, and Zhang XX
- Subjects
- Colorimetry, Molecular Structure, Point-of-Care Systems, Glucose analysis, Ice, Lab-On-A-Chip Devices, Nitrites analysis, Printing, Three-Dimensional
- Abstract
Herein, we proposed a portable, easy-to-operate, and antifouling microcapsule array chip for target detection. This prepackaged chip was fabricated by innovative and cost-effective 3D ice printing integrating with photopolymerization sealing which could eliminate complicated preparation of wet chemistry and effectively resist outside contaminants. Only a small volume of sample (2 μL for each microcapsule) was consumed to fulfill the assay. All the reagents required for the analysis were stored in ice form within the microcapsule before use, which guaranteed the long-term stability of microcapsule array chips. Nitrite and glucose were chosen as models for proof of concept to achieve an instant quantitative detection by naked eyes without the need of external sophisticated instruments. The simplicity, low cost, and small sample consumption endowed ice-printing microcapsule array chips with potential commercial value in the fields of on-site environmental monitoring, medical diagnostics, and rapid high-throughput point-of-care quantitative assay.
- Published
- 2015
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24. A smart tailor-made G-clip reporter for sensitive detection of G-triplet-containing sequences.
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Cai LY, Nie J, Zhang YW, Zhang FT, Zhou YL, and Zhang XX
- Subjects
- Base Sequence, Mutation, Biosensing Techniques methods, G-Quadruplexes, Guanine, Repetitive Sequences, Nucleic Acid genetics
- Abstract
Taking advantage of the intrinsic characteristics of G-triplet-containing sequences, a pioneering tailor-made clip-like reporter containing three-fourths of a G-quadruplex is established. The reporter can clip the G triplet in the target sequence through a recognition process to form a complete G-quadruplex structure.
- Published
- 2015
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25. Effect of Modified Roux-en-Y Gastric Bypass Surgery on GLP-1, GIP in Patients with Type 2 Diabetes Mellitus.
- Author
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Xiong SW, Cao J, Liu XM, Deng XM, Liu Z, and Zhang FT
- Abstract
The type 2 diabetes mellitus (T2DM) is one of the most serious diseases that threaten public health. Modified gastric bypass surgery has been applied to the treatment of T2DM patients in the 1990s, but the therapeutic mechanism to this function is still unclear. The aim of this study was to further clarify the effect and the mechanism of modified gastric bypass surgery on glucose metabolism in patients with T2DM. In the study, the incretin indexes and blood glucose indexes were analyzed before surgery and 1 week and 1, 3, and 6 months after surgery. The results suggested that modified Roux-en-Y gastric bypass can promote GLP-1 secretion in patients with T2DM, while reducing the secretion of GIP. Thus it could effectively control blood glucose of patients with T2DM.
- Published
- 2015
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26. Comparison of different gastric bypass procedures in gastric carcinoma patients with type 2 diabetes mellitus.
- Author
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Xiong SW, Zhang DY, Liu XM, Liu Z, and Zhang FT
- Subjects
- Adult, Biomarkers blood, Blood Glucose metabolism, Carcinoma complications, Carcinoma pathology, Diabetes Mellitus, Type 2 blood, Diabetes Mellitus, Type 2 diagnosis, Fasting blood, Female, Gastrectomy adverse effects, Gastric Bypass adverse effects, Glycated Hemoglobin metabolism, Humans, Male, Middle Aged, Postprandial Period, Retrospective Studies, Stomach Neoplasms complications, Stomach Neoplasms pathology, Time Factors, Treatment Outcome, Carcinoma surgery, Diabetes Mellitus, Type 2 complications, Gastrectomy methods, Gastric Bypass methods, Stomach Neoplasms surgery
- Abstract
Aim: To determine the effect of different Roux-en-Y gastric bypass procedures in gastric carcinoma patients with type 2 diabetes mellitus., Methods: A retrospective analysis of the clinical data of 54 patients with gastric cancer and type 2 diabetes mellitus treated in the Department of General Surgery from January 2006 to June 2013 was conducted. The patients underwent gastrectomy using different Roux-en-Y gastric bypass procedures (traditional, n = 26; modified, n = 28). Fasting plasma glucose (FPG), two hour postprandial blood glucose (2 h PBG) and hemoglobin A1c (HbA1c) were analyzed before surgery (0 mo) and 1, 3 and 6 mo after surgery., Results: FPG and 2 h PBG levels were significantly decreased 1 mo after surgery in the traditional Roux-en-Y gastric bypass group (FPG 7.5 ± 1.3 vs 10.7 ± 1.2, P < 0.05) (2 h PBG 10.2 ± 1.8 vs 13.8 ± 3.2, P < 0.05). FPG and 2 h PBG levels were significantly decreased after surgery in the modified Roux-en-Y gastric bypass group (FPG 6.9 ± 1.2 vs 10.5 ± 1.1, 6.5 ± 1.3 vs 10.5 ± 1.1, 6.4 ± 1.2 vs 10.5 ± 1.1, P < 0.05) (2 h PBG 9.9 ± 2.2 vs 14.1 ± 2.9, 9.2 ± 2.4 vs 14.1 ± 2.9, 8.9 ± 2.6 vs 14.1 ± 2.9, P < 0.05). Compared with the levels before surgery, HbA1c levels were significantly decreased 3 and 6 mo after surgery (7.2 ± 1.1 vs 10.5 ± 1.1, 5.5 ± 1.1 vs 10.5 ± 1.1, P < 0.05). Significant differences between the two groups regarding FPG, 2 h PBG and HbA1c concentration were observed 3 and 6 mo after surgery (FPG 10.1 ± 1.5 vs 6.5 ± 1.3, 10.3 ± 1.4 vs 6.4 ± 1.2, P < 0.05) (2 h PBG 13.1 ± 2.8 vs 9.2 ± 2.4, 13.6 ± 3.1 vs 8.9 ± 2.6, P < 0.05) (HbA1c 10.1 ± 1.4 vs 7.2 ± 1.1, 10.5 ± 1.3 vs 5.5 ± 1.1, P < 0.05)., Conclusion: Modified Roux-en-Y gastric bypass can improve glucose metabolism in type 2 diabetic patients with gastric cancer.
- Published
- 2014
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27. A G-quadruplex based platform for label-free monitoring of DNA reaction kinetics.
- Author
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Nie J, Cai LY, Zhang FT, Zhao MZ, Zhou YL, and Zhang XX
- Subjects
- Colorimetry, DNA, Catalytic metabolism, Hemin metabolism, Kinetics, Nucleic Acid Amplification Techniques, Peroxidase metabolism, DNA chemistry, DNA metabolism, G-Quadruplexes
- Abstract
Research on the kinetic characteristics and mechanisms of DNA reactions is crucial for bioengineering and biosensing. A G-quadruplex, which can form a peroxidase-mimicking DNAzyme with hemin, was for the first time used to establish a versatile platform for kinetic investigations on DNA reactions. G-quadruplex sequence EAD2 was incorporated into the corresponding nucleic acid reaction as product. The kinetic curves can be obtained rapidly and simply via the quantification of created DNAzyme. In this paper, the kinetics of isothermal linear strand displacement amplification reactions with different DNA lengths and isothermal exponential amplification reactions were successfully elucidated via the G-quadruplex based monitoring platform. As a safe and accessible alternative to the traditional methods, this robust, label-free, time-saving and high-throughput platform shows great potential for the exploration of more novel DNA reactions or circuits in an ingenious manner.
- Published
- 2014
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28. Methylene blue as a G-quadruplex binding probe for label-free homogeneous electrochemical biosensing.
- Author
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Zhang FT, Nie J, Zhang DW, Chen JT, Zhou YL, and Zhang XX
- Subjects
- Binding, Competitive, DNA chemistry, Electrochemical Techniques, Hemin chemistry, Solutions, Aptamers, Nucleotide chemistry, Biosensing Techniques, Cocaine isolation & purification, G-Quadruplexes, Methylene Blue chemistry
- Abstract
Herein, G-quadruplex sequence was found to significantly decrease the diffusion current of methylene blue (MB) in homogeneous solution for the first time. Electrochemical methods combined with circular dichroism spectroscopy and UV-vis spectroscopy were utilized to systematically explore the interaction between MB and an artificial G-quadruplex sequence, EAD2. The interaction of MB and EAD2 (the binding constant, K ≈ 1.3 × 10(6) M(-1)) was stronger than that of MB and double-stranded DNA (dsDNA) (K ≈ 2.2 × 10(5) M(-1)), and the binding stoichiometry (n) of EAD2/MB complex was calculated to be 1.0 according to the electrochemical titration curve combined with Scatchard analysis. MB was proved to stabilize the G-quadruplex structure of EAD2 and showed a competitive binding to G-quadruplex in the presence of hemin. EAD2 might mainly interact with MB, a positive ligand of G-quadruplex, through the end-stacking with π-system of the guanine quartet, which was quite different from the binding mechanism of dsDNA with MB by intercalation. A novel signal read-out mode based on the strong affinity between G-quadruplex and MB coupling with aptamer/G-quadruplex hairpin structure was successfully implemented in cocaine detection with high specificity. G-quadruplex/MB complex will function as a promising electrochemical indicator for constructing homogeneous label-free electrochemical biosensors, especially in the field of simple, rapid, and noninvasive biochemical assays.
- Published
- 2014
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29. Reporter-triggered isothermal exponential amplification strategy in ultrasensitive homogeneous label-free electrochemical nucleic acid biosensing.
- Author
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Nie J, Zhang DW, Zhang FT, Yuan F, Zhou YL, and Zhang XX
- Subjects
- G-Quadruplexes, Humans, Biosensing Techniques, DNA analysis, Electrochemical Techniques, Nucleic Acid Amplification Techniques, Temperature
- Abstract
A simple and novel reporter-triggered isothermal exponential amplification reaction (R-EXPAR) integrated with a miniaturized electrochemical device was developed, which achieved excellent improvement (five orders of magnitude) of sensitivity toward reporter, G-quadruplex. This R-EXPAR strategy has been successfully implemented to construct a homogeneous label-free electrochemical sensor for ultrasensitive DNA detection.
- Published
- 2014
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30. TNF/TNFR₁ pathway and endoplasmic reticulum stress are involved in ofloxacin-induced apoptosis of juvenile canine chondrocytes.
- Author
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Zhang FT, Ding Y, Shah Z, Xing D, Gao Y, Liu DM, and Ding MX
- Subjects
- Aging, Animals, Caspase 12 analysis, Cells, Cultured, Chondrocytes pathology, Dogs, Dose-Response Relationship, Drug, RNA, Messenger analysis, Receptors, Tumor Necrosis Factor, Type I genetics, Tumor Necrosis Factor-alpha genetics, Anti-Bacterial Agents toxicity, Apoptosis drug effects, Chondrocytes drug effects, Endoplasmic Reticulum Stress physiology, Ofloxacin toxicity, Receptors, Tumor Necrosis Factor, Type I physiology, Signal Transduction physiology, Tumor Necrosis Factor-alpha physiology
- Abstract
Background and Purpose: Quinolones cause obvious cartilaginous lesions in juvenile animals by chondrocyte apoptosis, which results in the restriction of their use in pediatric and adolescent patients. Studies showed that chondrocytes can be induced to produce TNFα, and the cisternae of the endoplasmic reticulum in quinolone-treated chondrocytes become dilated. We investigated whether TNF/TNFR₁ pathway and endoplasmic reticulum stress (ERs) are involved in ofloxacin (a typical quinolone)-induced apoptosis of juvenile canine chondrocytes., Experimental Approach: Canine juvenile chondrocytes were treated with ofloxacin. Cell survival and apoptosis rates were determined with MTT method and flow cytometry, respectively. The gene expression levels of the related signaling molecules (TNFα, TNFR₁, TRADD, FADD and caspase-8) in death receptor pathways and main apoptosis-related molecules (calpain, caspase-12, GADD153 and GRP78) in ERs were measured by qRT-PCR. The gene expression of TNFR₁ was suppressed with its siRNA. The protein levels of TNFα, TNFR₁ and caspase-12 were assayed using Western blotting., Key Results: The survival rates decreased while apoptosis rates increased after the chondrocytes were treated with ofloxacin. The mRNA levels of the measured apoptosis-related molecules in death receptor pathways and ERs, and the protein levels of TNFα, TNFR₁ and caspase-12 increased after the chondrocytes were exposed to ofloxacin. The downregulated mRNA expressions of TNFR₁, Caspase-8 and TRADD, and the decreased apoptosis rates of the ofloxacin-treated chondrocytes occurred after TNFR₁-siRNA interference., Conclusions and Implications: Ofloxacin-induced chondrocyte apoptosis in a time- and concentration-dependent fashion. TNF/TNFR₁ pathway and ERs are involved in ofloxacin-induced apoptosis of juvenile canine chondrocytes in the early stage., (Copyright © 2014 Elsevier Inc. All rights reserved.)
- Published
- 2014
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31. Catalytic asymmetric 1,2-addition of α-isothiocyanato phosphonates: synthesis of chiral β-hydroxy- or β-amino-substituted α-amino phosphonic acid derivatives.
- Author
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Cao YM, Shen FF, Zhang FT, Zhang JL, and Wang R
- Subjects
- Catalysis, Cyanates chemistry, Molecular Structure, Phosphorous Acids chemistry, Stereoisomerism, Organophosphonates chemistry, Phosphorous Acids chemical synthesis
- Abstract
α-Amino phosphonic acid derivatives are considered to be the most important structural analogues of α-amino acids and have a very wide range of applications. However, approaches for the catalytic asymmetric synthesis of such useful compounds are very limited. In this work, simple, efficient, and versatile organocatalytic asymmetric 1,2-addition reactions of α-isothiocyanato phosphonate were developed. Through these processes, derivatives of β-hydroxy-α-amino phosphonic acid and α,β-diamino phosphonic acid, as well as highly functionalized phosphonate-substituted spirooxindole, can be efficiently constructed (up to 99 % yield, d.r. >20:1, and >99 % ee). This novel method provides a new route for the enantioselective functionalization of α-phosphonic acid derivatives., (Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
- Published
- 2014
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32. Novel homogeneous label-free electrochemical aptasensor based on functional DNA hairpin for target detection.
- Author
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Zhang DW, Nie J, Zhang FT, Xu L, Zhou YL, and Zhang XX
- Subjects
- Aptamers, Nucleotide metabolism, Cocaine metabolism, DNA metabolism, DNA, Catalytic chemistry, DNA, Catalytic metabolism, Enzyme Activation, G-Quadruplexes, Aptamers, Nucleotide chemistry, Cocaine analysis, DNA chemistry, Electrochemical Techniques methods
- Abstract
We first developed a label-free and immobilization-free homogeneous electrochemical aptasensor, which combined a smart functional DNA hairpin and a designed miniaturized electrochemical device. Cocaine was chosen as a model target. The anticocaine aptamer and peroxidase-mimicking DNAzyme were integrated into one single-stranded DNA hairpin. Both aptamer and G-quadruplex were elaborately blocked by the stem region. The conformation switching induced by the affinity interaction between aptamer and cocaine released G-quadruplex part and turned on DNAzyme activity. The designed electrochemical device, constructed by a disposable micropipet tip and a reproducible carbon fiber ultramicroelectrode, was applied to the detection of homogeneous DNAzyme catalytic activity at the microliter level. The aptasensor realized the quantification of cocaine ranging from 1 to 500 μM with high specificity. The clever combination of the functional DNA hairpin and the novel device achieved an absolutely label-free electrochemical aptasensor, which showed excellent performance like low cost, easy operation, rapid detection, and high repeatability.
- Published
- 2013
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33. Catalytic enantioselective ring-opening reaction of meso-aziridines with α-isothiocyanato imides.
- Author
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Cao YM, Zhang FT, Shen FF, and Wang R
- Subjects
- Catalysis, Imides, Stereoisomerism, Aziridines chemistry, Nitriles chemistry
- Published
- 2013
- Full Text
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34. Diaqua-(5-carb-oxy-benzene-1,3-dicarboxyl-ato-κO(1))[8-ethyl-5-oxo-2-(piperazin-4-ium-1-yl)-5,8-dihydro-pyrido[2,3-d]pyrimidine-6-carboxyl-ato-κ(2)O(5),O(6)]zinc monohydrate.
- Author
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Ye ZL, Xin GH, Zhang FT, and Xiao DR
- Abstract
In the title compound, [Zn(C(14)H(17)N(5)O(3))(C(9)H(4)O(6))(H(2)O)(2)]·H(2)O, the complex mol-ecule exists in a zwitterionic form. The Zn(II) ion exhibits a distorted tetra-gonal-pyramidal geometry, being coordinated by two O atoms from the zwitterionic 8-ethyl-5-oxo-2-(piperazin-4-ium-1-yl)-5,8-dihydro-pyrido[2,3-d]pyrimidine-6-carboxyl-ate (L) ligand, one O atom from the 5-carb-oxy-benzene-1,3-dicarboxyl-ate dianion, [Hbtc](2-), and two O atoms from two aqua ligands. In the crystal, N-H⋯O and O-H⋯O hydrogen bonds link the components into a three-dimensional structure. The crystal packing exhibits π-π inter-actions between the aromatic rings, with centroid-centroid distances in the range 3.466 (3)-3.667 (3) Å.
- Published
- 2013
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35. Catalytic asymmetric Michael addition/cyclization of isothiocyanato oxindoles: highly efficient and versatile approach for the synthesis of 3,2'-pyrrolidinyl mono- and bi-spirooxindole frameworks.
- Author
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Cao YM, Shen FF, Zhang FT, and Wang R
- Subjects
- Catalysis, Cyclization, Indoles chemical synthesis, Oxindoles, Stereoisomerism, Indoles chemistry, Spiro Compounds chemistry
- Published
- 2013
- Full Text
- View/download PDF
36. A label-free aptasensor for the sensitive and specific detection of cocaine using supramolecular aptamer fragments/target complex by electrochemical impedance spectroscopy.
- Author
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Zhang DW, Zhang FT, Cui YR, Deng QP, Krause S, Zhou YL, and Zhang XX
- Subjects
- Biosensing Techniques instrumentation, Dielectric Spectroscopy, Electrodes, Equipment Reuse, Ferricyanides chemistry, Gold chemistry, Mercaptoethanol chemistry, Metal Nanoparticles chemistry, Sensitivity and Specificity, Aptamers, Nucleotide chemistry, Biosensing Techniques methods, Cocaine blood
- Abstract
A simple and label-free aptasensor for sensitive and specific detection of cocaine was developed by measuring the change in electrochemical impedance spectra (EIS), based on the formation of a supramolecular aptamer fragments/substrate complex. An anticocaine aptamer was divided into two fragments, Cx and Cy. Three different sensing interfaces, called Au/Cx5S/MCE, Au/Cy3S/MCE and Au/Cy5S/MCE, were fabricated by immobilizing Cx or Cy on a gold electrode through modifying their 5' or 3' end with a thiolated group followed by the treatment with mercaptoethanol (MCE). The formation of the corresponding supramolecular aptamer fragments/cocaine complex was investigated via monitoring electrochemical impedance spectra in the presence of [Fe(CN)(6)](3-/4-). The interfacial electron transfer resistance (R(et)) was found to depend strongly on the cocaine concentration. Since the supramolecular aptamer fragments/cocaine complex was formed on the electrode surface, the sensing interface strongly affected the sensitivity of the aptasensor. Au/Cx5S/MCE was shown to have good sensitivity within a cocaine detection range of 0.1-20 μM. Moreover, MCE was shown to improve the sensitivity of the aptasensor greatly. Even without the help of amplification or labeling, cocaine concentrations as low as 100 nM could be easily detected by the impedimetric aptasensor developed. The specificity and regeneration of the cocaine aptasensor were also investigated and satisfactory results were obtained. The developed aptasensor was successfully applied to detect the cocaine in biological fluids., (Copyright © 2012 Elsevier B.V. All rights reserved.)
- Published
- 2012
- Full Text
- View/download PDF
37. cis-Tetra-aqua-bis-{5-[4-(1H-imidazol-1-yl-κN(3))phen-yl]tetra-zolido}manganese(II) dihydrate.
- Author
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Wang X, Yan SW, Chang SC, Liang YC, and Zhang FT
- Abstract
In the title compound, [Mn(C(10)H(7)N(6))(2)(H(2)O)(4)]·2H(2)O, the complex unit comprises an Mn(2+) ion, coordinated by two imidazole N atoms from cis-related monodentate 5-[4-(imidazol-1-yl)phen-yl]tetra-zolide ligands and four water mol-ecules, together with two water mol-ecules of solvation. The Mn(2+) ion lies on a twofold rotation axis and has a slightly distorted octa-hedral geometry. The mol-ecules are connected by O-H⋯N and O-H⋯O hydrogen bonds involving both coordinated and solvent water mol-ecules, generating a three-dimensional structure. Two C atoms of the imidazole ring of the ligand are each disordered over two sites with occupancy factors of 0.75 and 0.25.
- Published
- 2012
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- View/download PDF
38. Global transcriptional profiling in porcine mammary glands from late pregnancy to peak lactation.
- Author
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Shu DP, Chen BL, Hong J, Liu PP, Hou DX, Huang X, Zhang FT, Wei JL, and Guan WT
- Subjects
- Animals, Female, Oligonucleotide Array Sequence Analysis, Pregnancy, Swine, Transcriptome genetics, Lactation metabolism, Mammary Glands, Animal metabolism
- Abstract
Sow milk yield and quality is crucial for the survival and growth of piglets. To understand the molecular mechanisms of lactogenesis and lactation, mammary tissue samples were taken from six sows at -17(±2), 1 and 17(±2) days relative to parturition. Mammary tissues from two sows in the same stage were used to extract RNA, which were subsequently pooled in equal amounts. Nine pooled samples were hybridized to porcine Affymetrix GeneChips. Totally 1,524 genes were detected as significantly differentially expressed over the time course tested (p<0.01, q<0.01, fold change≥2 or ≤-2), including 709 upregulated and 575 downregulated genes identified at peak lactation compared to late pregnancy. Gene ontology analysis revealed that most of the upregulated genes were involved in transport, biosynthetic processes, and homeostasis, whereas most of the downregulated genes were involved in intracellular signaling cascades, cell cycle, and DNA replication. Furthermore, we identified 64 differentially expressed genes of the solute carrier families. Taken together, our microarray analysis provides insights into previously uncharacterized changes in transcriptome between late pregnancy and peak lactation in the porcine mammary gland. The solute carrier genes and other differentially expressed genes identified in this study will guide further characterization of their function to enhance milk yield and piglet growth.
- Published
- 2012
- Full Text
- View/download PDF
39. An electrochemical aptasensor based on enzyme linked aptamer assay.
- Author
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Zhang DW, Sun CJ, Zhang FT, Xu L, Zhou YL, and Zhang XX
- Subjects
- Equipment Design, Equipment Failure Analysis, Reproducibility of Results, Sensitivity and Specificity, Aptamers, Nucleotide chemistry, Biosensing Techniques instrumentation, Conductometry instrumentation, Enzyme-Linked Immunosorbent Assay instrumentation, Horseradish Peroxidase chemistry
- Abstract
An aptamer is an artificial functional oligonucleic acid, which can interact with its target molecule with high affinity and specificity. Enzyme linked aptamer assay (ELAA) is developed to detect cocaine using aptamer fragment/cocaine configuration based on the affinity interaction between aptamer fragments with cocaine. The aptasensor was constructed by cleaving anticocaine aptamer into two fragments: one was assembled on a gold electrode surface, while the other was modified with biotin at 3'-end, which could be further labelled with streptavidin-horseradish peroxidase (SA-HRP). Upon binding with cocaine, the HRP-labelled aptamer fragment/cocaine complex formed on the electrode would increase the reduction current of hydroquinone (HQ) in the presence of H(2)O(2). The sensitivity and the specificity of the proposed electrochemical aptasensor were investigated by differential pulse voltammetry (DPV). The results indicated that the DPV signal change could be used to sensitively detect cocaine with the dynamic range from 0.1 μM to 50 μM and the detection limit down to 20 nM (S/N=3). The proposed aptasensor has the advantages of high sensitivity and low background current. Furthermore, a new configuration for ELAA requiring only a single aptamer sequence is constructed, which can be generalized for detecting different kinds of targets by cleaving the aptamers into two suitable segments., (Copyright © 2011 Elsevier B.V. All rights reserved.)
- Published
- 2012
- Full Text
- View/download PDF
40. [Characterisation of a rice dwarf and twist leaf 1 (dtl1) mutant and fine mapping of DTL1 gene].
- Author
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Zhang FT, Fang J, Sun CH, Li RB, Luo XD, Xie JK, Deng XJ, and Chu CC
- Subjects
- Chromosome Mapping, Gibberellins metabolism, Oryza growth & development, Oryza metabolism, Plant Proteins metabolism, Mutation, Oryza genetics, Plant Proteins genetics
- Abstract
Plant height is one of the most important agronomic traits, which determines grain yield. By a largescale screening of our mutant population, we identified a dwarf with twisty leaf mutant (dwarf and twist leaf 1, dtl1). Besides dwarf with twisty leaf, dtl1 also showed reduced tiller number and sterile phenotypes. Based on the internode length of dtl1, this mutant belongs to the nl type of dwarfing phenotype. Physiological assay with two phytohormones, gibberellin (GA), and brassinosteroid (BR), suggested that dtl1 was neither deficient nor insensitive to GA and BR. Genetic analysis showed that the phenotype of dtl1 was controlled by a single recessive gene. Using F2 population derived from a cross between dtl1 and an indica cultivar Taichung Native 1, the DTL1 gene was narrowed down to a 70.4 kb between two SSR markers, RM25923 and RM6673, on the long arm of chromosome 10, and co-segregated with InDel marker Z10-29, where thirteen open reading frames were predicted without known gene involved in controlling plant height. Thus, the DTL1 gene might be a novel gene which is related to plant height in rice.
- Published
- 2012
- Full Text
- View/download PDF
41. Identification of the VIL2 enhancer in human embryonic kidney cells.
- Author
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Gao SY, Dai YP, Long X, Zhang FT, and Yu J
- Subjects
- Genes, Reporter, HEK293 Cells, Humans, Luciferases genetics, Luciferases metabolism, Promoter Regions, Genetic, Transcription, Genetic, Cytoskeletal Proteins genetics, Enhancer Elements, Genetic genetics
- Abstract
We previously demonstrated that the VIL2 -87/+134 region exhibited promoter activity in some human cells, and a region further upstream of this promoter might contain an enhancer. However, the properties and location of this VIL2 enhancer remain unclear. In this study, we cloned the VIL2 -1541/-706 segment and investigated its transcriptional regulatory properties via luciferase assays in transiently transfected HEK-293 cells (human embryonic kidney cells). The VIL2 -1541/-706 was found to exhibit promoter activity. Furthermore, when this segment was located upstream of the VIL2 or SV40 (simian virus 40) promoters in the forward orientation, the expression levels of luciferase were dramatically enhanced. However, this transcriptional enhancement disappeared when this segment was located upstream of the promoter in the reverse orientation or downstream of the reporter gene in the forward or reverse orientation. In deletion experiments, we found several potential regulatory regions within the VIL2 -1541/-706. When these regions were separately located upstream of the VIL2 or SV40 promoters, only the -1297/-1186 considerably enhanced the activity of these promoters. Although the other regulatory regions exhibited significant transcriptional regulation in deletion experiments, they weakly enhanced VIL2 promoter activity and/or did not regulate SV40 promoter activity. These results suggest that the DNA sequence upstream of the VIL2 promoter functions as an enhancer in a position- and orientation-dependent manner, and the VIL2 -1297/-1186, which acts as a key enhancer, probably regulates VIL2 transcription in combination with other potential regulatory regions located upstream of the VIL2 promoter.
- Published
- 2011
- Full Text
- View/download PDF
42. catena-Poly[[(2,2'-bipyridine)-manganese(II)]-μ(3)-4,4'-sulfonyl-dibenzoato].
- Author
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Yan SW, Zhang GJ, Chen HY, Chang SC, and Zhang FT
- Abstract
In the title compound, [Mn(C(14)H(8)O(6)S)(C(10)H(8)N(2))](n), the Mn(II) ion is coordinated by four O atoms from three 4,4'-sulfonyl-dibenzoate (sdba) ligands and two N atoms from one 2,2'-bipyridine (2,2'-bipy) ligand in a distorted octa-hedral geometry. The manganese atoms are alternately bridged either by two sdba ligands, with an Mn⋯Mn separation of 12.284 (1) Å, or by two carboxyl-ate groups from two sdba ligands, with an Mn⋯Mn separation of 4.064 (1) Å, thus producing polymeric chains propagated in [101]. Weak inter-molecular C-H⋯O hydrogen bonds and π-π inter-actions [centroid-centroid distance of 3.730 (3) Å between the aromatic rings of neighbouring polymeric chains] further stabilize the crystal packing.
- Published
- 2011
- Full Text
- View/download PDF
43. Transplantation of microencapsulated umbilical-cord-blood-derived hepatic-like cells for treatment of hepatic failure.
- Author
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Zhang FT, Wan HJ, Li MH, Ye J, Yin MJ, Huang CQ, and Yu J
- Subjects
- Animals, Antigens, CD34 metabolism, Cell Differentiation drug effects, Cells, Cultured, Fetal Blood cytology, Fetal Blood drug effects, Fetal Blood immunology, Fibroblast Growth Factor 4 pharmacology, Galactosamine adverse effects, Hepatocyte Growth Factor pharmacology, Humans, Liver Failure, Acute chemically induced, Models, Animal, Rats, Rats, Sprague-Dawley, Treatment Outcome, Cell- and Tissue-Based Therapy methods, Cord Blood Stem Cell Transplantation methods, Drug Compounding methods, Hepatocytes transplantation, Liver Failure, Acute therapy
- Abstract
Aim: To investigate intraperitoneal transplantation of microencapsulated hepatic-like cells from human umbilical cord blood for treatment of hepatic failure in rats., Methods: CD34+ cells in umbilical cord blood cells were isolated by magnetic cell sorting. In the in vitro experiment, sorted CD34+ cells were amplified and induced into hepatic-like cells by culturing with a combination of fibroblast growth factor 4 and hepatocyte growth factor. Cultures without growth factor addition served as controls. mRNA and protein levels for hepatic-like cells were analyzed by reverse transcription-polymerase chain reaction, immunohistochemistry and immunofluorescence. In the in vivo experiment, the hepatic-like cells were encapsulated and transplanted into the abdominal cavity of acute hepatic failure (AHF) rats at 48 h after D-galactosamine induction of acute hepatic failure. Transplantation with PBS and unencapsulated hepatic-like cells served as controls. The mortality rate, hepatic pathological changes and serum biochemical indexes were determined. The morphology and structure of microcapsules in the greater omentum were observed., Results: Human albumin, alpha-fetoprotein and GATA-4 mRNA and albumin protein positive cells were found among cultured cells after 16 d. Albumin level in culture medium was significantly increased after culturing with growth factors in comparison with culturing without growth factor addition (P < 0.01). Compared with the unencapsulated group, the mortality rate of the encapsulated hepatic-like cell-transplanted group was significantly lower (P < 0.05). Serum biochemical parameters, alanine aminotransferase, aspartate aminotransferase and total bilirubin in the encapsulated group were significantly improvement compared with the PBS control group (P < 0.01). Pathological staining further supported these findings. At 1-2 wk post-transplantation, free microcapsules with a round clear structure and a smooth surface were observed in peritoneal lavage fluid, surviving cells inside microcapsules were found by trypan blue staining, but some fibrous tissue around microcapsules was also detected in the greater omentum of encapsulated group by hematoxylin and eosin staining., Conclusion: Transplantation of microencapsulated hepatic-like cells derived from umbilical cord blood cells could preliminarily alleviate the symptoms of AHF rats.
- Published
- 2011
- Full Text
- View/download PDF
44. Expressional induction of Paralichthys olivaceus cathepsin B gene in response to virus, poly I:C and lipopolysaccharide.
- Author
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Zhang FT, Zhang YB, Chen YD, Zhu R, Dong CW, Li YY, Zhang QY, and Gui JF
- Subjects
- Amino Acid Sequence, Animals, Cathepsin B genetics, Cells, Cultured, Lipopolysaccharides pharmacology, Molecular Sequence Data, Cathepsin B metabolism, Flounder metabolism, Gene Expression Regulation drug effects, Gene Expression Regulation immunology, Poly I-C pharmacology, RNA Viruses physiology
- Abstract
Cathepsin B is a lysosomal cysteine protease of the papain-like enzyme family with multiple biological functions. In this study, Paralichthys olivaceus cathepsin B (PoCatB) cDNA was isolated from flounder embryonic cells (FEC) treated with UV-inactivated grass carp hemorrhage virus (GCHV) and subsequently identified as a virally induced gene. The full length cDNA of PoCatB is 1801bp encoding 330-amino acids. The deduced protein has high homology to all known cathepsin B proteins, containing an N-terminal signal peptide, cysteine protease active sites, the occluding loop segment and a glycosylation site, all of which are conserved in the cathepsin B family. PoCatB transcription of FEC cells could be induced by turbot (Scophthalmus maximus) rhabdovirus (SMRV), UV-inactivated SMRV, UV-inactivated GCHV, poly I:C or lipopolysaccharide (LPS), and SMRV or poly I:C was revealed to be most effective among the five inducers. In normal flounder, PoCatB mRNA was detectable in all examined tissues. Moreover, SMRV infection could result in significant upregulation of PoCatB mRNA, predominantly in spleen, head kidney, posterior kidney, intestine, gill and muscle with 18.2, 10.9, 24.7, 12, 31.5 and 18 fold increases at 72h post-infection respectively. These results provided the first evidence for the transcriptional induction of cathepsin B in fish by virus and LPS, indicating existence of a novel function in viral defense.
- Published
- 2008
- Full Text
- View/download PDF
45. Molecular characterisation and inductive expression of a fish protein arginine methyltransferase 1 gene in response to virus infection.
- Author
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Dong CW, Zhang YB, Lu AJ, Zhu R, Zhang FT, Zhang QY, and Gui JF
- Subjects
- Amino Acid Sequence, Animals, Base Sequence, Cell Line, DNA Primers chemistry, Embryo, Nonmammalian cytology, Fish Diseases enzymology, Fish Diseases virology, Flounder genetics, Flounder virology, Molecular Sequence Data, Phylogeny, Protein-Arginine N-Methyltransferases biosynthesis, Protein-Arginine N-Methyltransferases chemistry, Protein-Arginine N-Methyltransferases immunology, RNA, Messenger, Reverse Transcriptase Polymerase Chain Reaction veterinary, Rhabdoviridae immunology, Rhabdoviridae Infections enzymology, Rhabdoviridae Infections immunology, Sequence Alignment veterinary, Sequence Homology, Amino Acid, Up-Regulation, Fish Diseases immunology, Flounder immunology, Gene Expression Regulation, Enzymologic immunology, Protein-Arginine N-Methyltransferases genetics, Rhabdoviridae Infections veterinary
- Abstract
Protein arginine methyltransferase 1 (PRMT1) is currently thought as an effector to regulate interferon (IFN) signalling. Here Paralichthys olivaceus PRMT1 (PoPRMT1) gene was identified as a virally induced gene from UV-inactivated Scophthalmus maximus Rhabdovirus (SMRV)-infected flounder embryonic cells (FEC). PoPMRT1 encodes a 341-amino-acid protein that shares the conserved domains including post-I, motif I, II and III. Homology comparisons show that the putative PoPMRT1 protein is the closest to zebrafish PMRT1 and belongs to type I PRMT family (including PRMT1, PRMT2, PRMT3, PRMT4, PRMT6, PRMT8). Expression analyses revealed an extensive distribution of PoPMRT1 in all tested tissues of flounder. In vitro induction of PoPRMT1 was determined in UV-inactivated SMRV-infected FEC cells, and under the same conditions, flounder Mx was also transcriptionally up-regulated, indicating that an IFN response might be triggered. Additionally, live SMRV infection of flounders induced an increased expression of PoPRMT1 mRNA and protein significantly in spleen, and to a lesser extent in head kidney and intestine. Immunofluorescence analysis revealed a major cyptoplasmic distribution of PoPRMT1 in normal FEC but an obvious increase occurred in nucleus in response to UV-inactivated SMRV. This is the first report on in vitro and in vivo expression of fish PRMT1 by virus infection, suggesting that PoPRMT1 might be implicated in flounder antiviral immune response.
- Published
- 2007
- Full Text
- View/download PDF
46. [Research progress in ectopic grafting of testicular tissues].
- Author
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Yu J, Zhang FT, Cai ZM, and Fang JZ
- Subjects
- Animals, Cats, Cattle, Cricetinae, Goats, Humans, Macaca mulatta, Male, Mice, Rabbits, Swine, Transplantation Immunology, Transplantation, Heterologous, Transplantation, Homologous, Testis transplantation, Transplantation, Heterotopic
- Abstract
Since Nature published the first report in 2002 on using immunodeficient mice as recipients and allogeneous or heterogeneous testes as donor tissues to study the ectopic development of spermatogenic cells, the technique has been widely applied in various species (including human). In comparison with other in vitro maturation methods for male germ cells, testicular allografting or xenografting technique has such advantages as similar environment for the development of germ cells in physiological conditions, and better reproducibility. Up to now, sperm has been successfully produced by this technique from the testicular tisues of the immature mouse, hamster, cat, rabbit, pig, goat, bovine and rhesus monkey, and their offspring have even been generated by ICSI technique using the mouse and rabbit sperm derived from testis grafts. This article comprehensively reviews the development of the technique by discussing the influencing factors on the germ cell development in grafts including the variety and age of donors, the sex, integrity and immunity of recipients, the graft location and grafting time. And the applications of the technique and the existing problems are discussed as well.
- Published
- 2006
47. Development of neonatal mouse and fetal human testicular tissue as ectopic grafts in immunodeficient mice.
- Author
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Yu J, Cai ZM, Wan HJ, Zhang FT, Ye J, Fang JZ, Gui YT, and Ye JX
- Subjects
- Animals, Animals, Newborn, Base Sequence, DNA Primers, Gene Expression Profiling, Humans, Male, Mice, Mice, Inbred BALB C, Testis metabolism, Immunologic Deficiency Syndromes physiopathology, Testis growth & development
- Abstract
Aim: To investigate the stepwise development and germ cell gene expression in allografted neonatal mouse testes and the differentiation of immature human testicular cells in xenografted human testes., Methods: Immunodeficient nude mice were used as hosts for allografting of neonatal mouse testes and xenografting of human fetal testicular tissues. Stepwise development and stage-specific gene expression of germ cells in allografts were systematically evaluated and parallel compared with those in intact mice by periodically monitoring the graft status with measurement of graft weight, histological analysis and determination of five stage-specific genes. Human testicular tissues from 20 and 26 weeks fetuses were used for the xenografting study. Histological analysis of xenografts was performed 116 and 135 d after the grafting procedure., Results: In the allografting study, progressive increase in tissue volume and weight as well as in tubule diameter in grafts was observed; the appearance time of various germ cells in seminiferous tubules, including spermatogonia, spermatocytes, round and elongate spermatids and sperm, was comparable with that in intact donors; the initiation of gene transcription in grafts showed a similar trend as in normal mice. Graft weight ceased to increase after 7-8 weeks and degradation of grafts was observed after 5 weeks with progressive damage to seminiferous epithelium. In the xenografting study using immature human testicular tissues, graft survival and development was indicated by increasing graft weight, Sertoli cells differentiation into advanced stage, germ cells migration and location to the basal lamina and formation of a niche-like structure., Conclusion: The developmental course and gene expression pattern of germ cells in allografts were similar to those in intact mice. The best time point for retrieval of mouse sperm from grafts was 5-7 weeks after grafting procedure. An accelerated development of immature human testicular cells could be achieved by ectopic xenografting of human testes.
- Published
- 2006
- Full Text
- View/download PDF
48. [Growth factor induced differentiation of human umbilical cord blood mononuclear cell into hepatocyte].
- Author
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Fang JZ, Zhang FT, and Wang XX
- Subjects
- Cells, Cultured, Fibroblast Growth Factor 4 pharmacology, Hepatocyte Growth Factor pharmacology, Humans, Cell Differentiation drug effects, Fetal Blood cytology, Hepatocytes cytology
- Published
- 2006
49. [Establishment of a neonatal piglet model of multiple organ dysfunction syndrome].
- Author
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Li G, Zhou WL, Zhang FT, Huang DJ, Kuang LY, and Cui QL
- Subjects
- Animals, Animals, Newborn, Female, Male, Multiple Organ Failure blood, Multiple Organ Failure pathology, Swine, Disease Models, Animal, Multiple Organ Failure etiology
- Abstract
Objective: To study the reliability of establishing a neonatal piglet model of multiple organ dysfunction syndrome (MODS) by cecal ligation and puncture (CLP)., Methods: Fourteen neonatal piglets were randomly assigned into Experiment group (n=9) and Control group (n=5). MODS model was established in the piglets from the Experiment group by CLP. The Control group underwent a sham-operation. Serum biochemical parameters (ALT, AST, ALB, BUN, Cr, CK-MB and lactic acid), blood platelet counting and blood gas analysis(PaO2 and PaCO2) were tested at 0, 24, 48, 72, 96, and 120 hrs after operation. The histomorphological changes of important vital organs were examined by hematoxylin-eosin staining under a light microscope., Results: The levels of serum ALT, AST, BUN, Cr, CK-MB and lactic acid in the Experiment group began to increase 24 hrs after operation. Significant differences were observed between the Experiment and the Control group at 48 hrs in ALT (83.0 +/- 9.3 U/L vs 57.8 +/- 15.8 U/L), AST (348.8 +/- 132.9 U/L vs 106.4 +/- 12.5 U/L), BUN (10.5 +/- 2.5 micromol/L vs 4.3 +/- 1.0 micromol/L), Cr (79.2 +/- 9.0 micromol/L vs 53.6 +/- 6.8 micromol/L), CK-MB (5152.0 +/- 1 857.8 U/L vs 1243.0 +/- 354.5 U/L), and lactic acid (12.3 +/- 4.0 mmol/L vs 4.6 +/- 1.5 mmol/L) (P < 0.01). The high levels of the above parameters persisted until 96 hrs after operation in the Experiment group and then decreased but were still higher than those at 0 h after operation. After operation, the blood platelet counting decreased significantly at 96 hrs, and PaO2 decrease and PaCO2 increase were observed at 48 hrs in the Experiment group compared with the Control group. All animals, except one, in the Experiment group died within 120 hrs after operation (with the MODS incidence of 56%), while none died in the Control group. The tissue injuries with different degrees were observed in the lungs, liver, heart, kidneys and gastrointestinal tracts of the Experiment group., Conclusions: Neonatal piglet MODS model can be established successfully by CLP.
- Published
- 2006
50. Molecular cloning and stress-induced expression of paralichthys olivaceus heme-regulated initiation factor 2alpha kinase.
- Author
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Zhu R, Zhang YB, Chen YD, Dong CW, Zhang FT, Zhang QY, and Gui JF
- Subjects
- Amino Acid Sequence, Animals, Base Sequence, Cell Line, Cloning, Molecular, Flounder immunology, Heat-Shock Response immunology, Molecular Sequence Data, Phylogeny, Poly I-C immunology, RNA, Messenger biosynthesis, RNA, Messenger genetics, Reverse Transcriptase Polymerase Chain Reaction veterinary, Sequence Alignment, Stress, Physiological enzymology, Stress, Physiological immunology, eIF-2 Kinase biosynthesis, eIF-2 Kinase immunology, Flounder genetics, Flounder metabolism, Stress, Physiological veterinary, eIF-2 Kinase genetics
- Abstract
The heme-regulated initiation factor 2alpha kinase (HRI) is acknowledged to play an important role in translational shutoff in reticulocytes in response to various cellular stresses. In this study, we report its homologous cDNA cloning and characterization from cultured flounder embryonic cells (FEC) after treatment with UV-inactivated grass carp haemorrhagic virus (GCHV). The full-length cDNA of Paralichthys olivaceus HRI homologue (PoHRI) has 2391 bp and encodes a protein of 651 amino acids. The putative PoHRI protein exhibits high identity with all members of eIF2alpha kinase family. It contains 12 catalytic subdomains located within the C-terminus of all Ser/Thr protein kinases, a unique kinase insertion of 136 amino acids between subdomains IV and V, and a relatively conserved N-terminal domain (NTD). Upon heat shock, virus infection or Poly I:C treatment, PoHRI mRNA and protein are significantly upregulated in FEC cells but show different expression patterns in response to different stresses. In healthy flounders, PoHRI displays a wide tissue distribution at both the mRNA and protein levels. These results indicate that PoHRI is a ubiquitous eIF2alpha kinase and might play an important role in translational control over nonheme producing FEC cells under different stresses.
- Published
- 2006
- Full Text
- View/download PDF
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