44 results on '"Jiaxuan Zheng"'
Search Results
2. Understanding the evolution trend of urban flood risk and resilience for better flood management
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Wenjie Chen, Yong Lei, Long Qi, Jiaxuan Zheng, Guoru Huang, and Huilin Wang
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Urban flood risk ,Urban flood resilience ,Pearl River Delta ,Evolution trend ,Spatiotemporal analysis ,Ecology ,QH540-549.5 - Abstract
The Pearl River Delta (PRD) has undergone rapid urbanization over the past three decades, leading to significant changes in urban flood risk and resilience. This study addresses the critical need to understand evolution trend of urban flood risk and resilience in the PRD for both pre-urbanization (1990) and post-urbanization (2020) periods. Using 12 indices integrated within the different frameworks, the spatial and temporal evolution of risk and resilience over the past 30 years are analyze. Six new evaluative indicators are introduced to capture spatial characteristics and their evolutionary trends more accurately. Findings reveal the spatial distribution of urban flood risk and resilience. And the results further indicate that high-risk and low-resilience areas have expanded, become more interconnected, and exhibited increased fragmentation and complexity, while spatial aggregation has decreased. High-risk areas particularly show a trend of spreading southward, whereas low-resilience areas have remained relatively stable. Strategies involving green infrastructure to reduce the interconnection of flood risk patches, urban planning to limit the expansion of risk regions, and adaptive management to handle the complexity of flood-prone areas are proposed. This study provides insights into the spatiotemporal evolution of flood risk and resilience, offering valuable guidance for urban planners and policymakers.
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- 2024
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3. Naringenin attenuates inflammation and apoptosis of osteoarthritic chondrocytes via the TLR4/TRAF6/NF-κB pathway
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Yan Wang, Zhengzhao Li, Bo Wang, Ke Li, and Jiaxuan Zheng
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Naringenin ,Osteoarthritic ,Chondrocytes ,Inflammation ,The TLR4/TRAF6/NF-κB pathway ,Medicine ,Biology (General) ,QH301-705.5 - Abstract
Naringenin is a flavonoid extracted from the seed coat of Anacardiaceae plants. Increasing evidence indicates that it has several properties of biological significance, such as anti-infection, sterilization, anti-allergy, antioxidant free radical, and anti-tumor. However, its effect on osteoarthritis has not been elucidated properly. In this study, the treatment of primary chondrocytes with interleukin (IL)-1β was found to increase the secretions of IL-6, tumor necrosis factor (TNF)-α, and cyclooxygenase-2 (COX-2). Further, the mRNA expression of matrix metalloproteinase ((MMP)3, MMP9, and MMP13), the protein expression of Recombinant A Disintegrin And Metalloproteinase With Thrombospondin 5 (ADAMTS5), and cell apoptosis increased; the protein expression of Collagen II decreased. The injury of primary chondrocytes induced by IL-1β was reversed under the intervention of naringenin; this reversal was dose-dependent. The mechanistic study showed that naringenin inhibited the toll-like receptor 4 (TLR4)/TNF receptor-associated factor 6 (TRAF6)/NF-κB pathway in IL-1β-stimulated primary cells, and LPS, a TLR4 activator, reversed this inhibitory effect. In addition, a mouse model of osteoarthritis was established and treated with naringenin. The results revealed that naringenin alleviated the pathological symptoms of osteoarthritis in mice, reduced the expression of TLR4 and TRAF6, and the phosphorylation of NF-κB in knee cartilage tissue. It also inhibited the secretion of inflammatory factors, reduced extracellular matrix degradation, and decreased the protein expression of cleaved caspase3. In conclusion, the findings of this study suggest that naringenin may be a potential option for the treatment of osteoarthritis.
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- 2023
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4. Bioinformatic analysis of the gene expression profile in muscle atrophy after spinal cord injury
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Hui Huang, Jinju Xue, Jiaxuan Zheng, Haiquan Tian, Yehan Fang, Wei Wang, Guangji Wang, Dan Hou, and Jianping Lin
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Medicine ,Science - Abstract
Abstract Spinal cord injury (SCI) is often accompanied by muscle atrophy; however, its underlying mechanisms remain unclear. Here, the molecular mechanisms of muscle atrophy following SCI were investigated. The GSE45550 gene expression profile of control (before SCI) and experimental (14 days following SCI) groups, consisting of Sprague–Dawley rat soleus muscle (n = 6 per group), was downloaded from the Gene Expression Omnibus database, and then differentially expressed gene (DEG) identification and Gene Ontology, pathway, pathway network, and gene signal network analyses were performed. A total of 925 differentially expressed genes, 149 biological processes, and 55 pathways were screened. In the pathway network analysis, the 10 most important pathways were citrate cycle (TCA cycle), pyruvate metabolism, MAPK signalling pathway, fatty acid degradation, propanoate metabolism, apoptosis, focal adhesion, synthesis and degradation of ketone bodies, Wnt signalling, and cancer pathways. In the gene signal network analysis, the 10 most important genes were Acat1, Acadvl, Acaa2, Hadhb, Acss1, Oxct1, Hadha, Hadh, Acaca, and Cpt1b. Thus, we screened the key genes and pathways that may be involved in muscle atrophy after SCI and provided support for finding valuable markers for this disease.
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- 2021
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5. Employing machine learning using ferroptosis-related genes to construct a prognosis model for patients with osteosarcoma
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Hui Huang, Zhifang Ye, Zhengzhao Li, Bo Wang, Ke Li, Kai Zhou, Huiyuan Cao, Jiaxuan Zheng, and Guangji Wang
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machine learning ,osteosarcoma ,ferroptosis ,prognostic model ,tumor microenvironment ,Genetics ,QH426-470 - Abstract
Identifying effective biomarkers in osteosarcoma (OS) is important for predicting prognosis. We investigated the prognostic value of ferroptosis-related genes (FRGs) in OS. Transcriptome and clinical data were obtained from The Cancer Genome Atlas and Gene Expression Omnibus. FRGs were obtained from the ferroptosis database. Univariate COX regression and LASSO regression screening were performed and an FRG-based prognostic model was constructed, which was validated using the Gene Expression Omnibus cohort. The predictive power of the model was assessed via a subgroup analysis. A nomogram was constructed using clinical markers with independent prognostic significance and risk score results. The CIBERSORT algorithm was used to detect the correlation between prognostic genes and 22 tumor-infiltrating lymphocytes. The expression of prognostic genes in erastin-treated OS cell lines was verified via real-time PCR. Six prognostic FRGs (ACSL5, ATF4, CBS, CDO1, SCD, and SLC3A2) were obtained and used to construct the risk prognosis model. Subjects were divided into high- and low-risk groups. Prognosis was worse in the high-risk group, and the model had satisfactory prediction performance for patients younger than 18 years, males, females, and those with non-metastatic disease. Univariate COX regression analysis showed that metastasis and risk score were independent risk factors for patients with OS. Nomogram was built on independent prognostic factors with superior predictive power and patient benefit. There was a significant correlation between prognostic genes and tumor immunity. Six prognostic genes were differentially expressed in ferroptosis inducer-treated OS cell lines. The identified prognostic genes can regulate tumor growth and progression by affecting the tumor microenvironment.
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- 2023
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6. High Oxygen Shocking Reduces Postharvest Disease and Maintains Satisfying Quality in Fresh Goji Berries during Cold Storage by Affecting Fungi Community Composition
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Shuangdi Hou, Gaopeng Zhang, Wei Zhao, Jiaxuan Zheng, Min Xue, Yanli Fan, and Xia Liu
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fungi community ,high oxygen shocking ,goji berry ,quality ,Chemical technology ,TP1-1185 - Abstract
Fresh goji (Lycium barbarum L.) berries were treated with high-concentration (50% and 90%) oxygen shocking for 30 min and then stored at 0 ± 0.5 °C for 30 d. Decay, aerobic plate count, firmness, weight loss, total soluble solid (TSS), and titratable acidity (TA) were evaluated during storage. A total of 90% O2 shocking more effectively reduced decay and maintained the weight loss and firmness of goji berries. Subsequently, changes in fungi communities were analyzed using high-throughput sequencing (HTS) in the 90% O2-shocking and control groups. The results showed that 90% O2 shocking retained the richness and diversity of fungi communities and the microbiome was related to the quality properties of the fruit. Thus, we inferred that high oxygen shocking inhibited the development of natural decay and maintained the satisfying quality of goji berries by affecting the fungi community composition, which reduced the growth of pathogenic fungi and harmful saprotrophic fungi in the genera, such as Filobasidium sp., Alternaria sp., and Cladosporium sp. We provide a new insight into the disease development and quality changes during the storage of postharvest goji berries.
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- 2023
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7. A Large Cavernous Sinus Giant Cell Tumor Invading Clivus and Sphenoid Sinus Masquerading as Meningioma: A Case Report and Literature Review
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Shasha Hu, Shaowen Cheng, Yu Wu, Yanyan Wang, XinNian Li, Jiaxuan Zheng, Jiao Li, Lei Peng, and Jian Yang
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case report ,giant cell tumors ,cavernous sinus ,clivus ,sphenoid sinus ,Surgery ,RD1-811 - Abstract
Giant cell tumor (GCT) of the bone is a rare benign, locally aggressive tumor that occurs in the epiphysis of long bones, especially the lower femur and the upper tibia. GCT of the bone of cranial origin is very rare, accounting for 1% of all GCT of the bone. We report the diagnosis, treatment, and immunohistochemistry of a rare case of intracranial GCT of the bone. We also review and summarize the imaging features, diagnostic markers, and current major treatment options for GCT of the bone. Our case and literature review emphasizes the importance of considering the full picture when making a diagnosis, rather than relying on imaging alone to make the diagnosis.
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- 2022
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8. Electrical Properties of Lumbar Paraspinal Muscles in Young Adults With and Without Chronic Low Back Pain Based on Electrical Impedance Myography: A Cross-Sectional Study
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Hongjiang Wang, Jiaxuan Zheng, Qiuhua Yu, Ziyan Fan, Wai Leung Ambrose Lo, Le Li, and Chuhuai Wang
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electrical impedance myography ,lumbar paraspinal muscle ,chronic low back pain ,electrical property ,Roland–Morris Disability Questionnaire ,Oswestry Disability Index ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
BackgroundLumbar paraspinal muscle (LPM) is important in spinal stabilization in patients with chronic low back pain (CLBP). However, the electrical properties of LPM in patients with CLBP remain unclear. Electrical impedance myography (EIM) is a novel and non-invasive technique that provides a simple quantitative evaluation of electrical properties of the LPM.PurposeThis study aimed to apply EIM to assess the electrical properties of the LPM between patients with CLBP and healthy control (HC).MethodsThirty participants (15 CLBP participants; 15 healthy controls) were enrolled in the study. Participants in the CLBP group were asked to complete the visual analog scale (VAS), Oswestry Disability Index (ODI), and Roland–Morris Disability Questionnaire (RDQ) to assess the pain intensity and disability in daily life. Independent sample t-tests were adopted to analyze the basic characteristics between the two groups. At 5, 50, 100, and 200 kHz current frequencies, the electrical properties were measured on each side of the LPM. The EIM parameters of resistance (R), reactance (X), phase angle (PA), and Z value were analyzed by one-way analysis of variance (ANOVA), with age as covariate. Spearman's rank correlation coefficient analysis was applied to explore the relationships between the questionnaires and the EIM parameters.ResultsThe R and Z values of bilateral LPM in the CLBP group were significantly larger than those in the HC group; the PA decreased and the X did not change at these four tested current frequencies. At 5 kHz, Z and R on the right side were non-significantly different between patients and HCs. Correlation analysis showed that at 50 kHz, ODI and RDQ scores correlated negatively with the R of the bilateral LPM (r = 0.523, r = 0.581, respectively; p < 0.05). RDQ scores correlated positively with the PA of the right LPM (r = 0.521, p < 0.05).ConclusionThe electrical properties of the bilateral LPM differed between CLBP participants and healthy individuals, regardless of the different frequencies used. These altered electrical properties of the LPM in the patients with CLBP correlated to some extent with disability in daily life.
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- 2022
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9. Micro Electro-Osmotic Thrusters of Power-Law Fluids for Space Propulsion
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Jiaxuan Zheng, Jialu Wang, and Yongjun Jian
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electro-osmotic thrusters ,power-law fluids ,non-Newtonian fluids ,microchannel ,Mechanical engineering and machinery ,TJ1-1570 - Abstract
In this article, electro-osmotic thrusters (EOTs), which are full of non-Newtonian power-law fluids with a flow behavior index n of the effective viscosity, are theoretically investigated in a microchannel. Different values of the flow behavior index represent two kinds of non-Newtonian power-law fluids, pseudoplastic fluids (n < 1) and dilatant fluids (n > 1), which have not yet been considered to be used as propellants in micro-thrusters. Analytical solutions of the electric potential and flow velocity are obtained using the Debye–Hückel linearization assumption and the approximate scheme of hyperbolic sine function. Then, thruster performances of power-law fluids, including specific impulse, thrust, thruster efficiency, and thrust-to-power ratio, are explored in detail. Results show that these performance curves strongly depend on the flow behavior index and electrokinetic width. It is noted that the non-Newtonian pseudoplastic fluid is most suitable as a propeller solvent in micro electro-osmotic thrusters owing to its improving or optimizing deficiencies in the performances of the existing Newtonian fluid thrusters.
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- 2023
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10. Music Therapy Alleviates Motor Dysfunction in Rats With Focal Cerebral Ischemia–Reperfusion Injury by Regulating BDNF Expression
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Weiguan Chen, Jiaxuan Zheng, Guangyu Shen, Xin Ji, Linlin Sun, Xia Li, Feng Xu, and Jin-hua Gu
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music ,middle cerebral artery occlusion ,motor dysfunction ,brain derived neurotrophic factor ,glial fibrillary acidic protein ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Background/Aim: Music-based therapy plays a role in central nervous system diseases. We aimed to explore the effect of different doses and durations of music therapy on motor function recovery after stroke and the underlying molecular mechanisms.Methods: Adult male Sprague–Dawley rats were subjected to middle cerebral artery occlusion (MCAO) for 1 h, which was followed by reperfusion. In experiment 1, the rats that survived 1 week after MCAO surgery were randomly allocated into four groups (n = 10 per group): MCAO group, 1 h music group (Mozart K.448 music therapy 1 h per day for 2 weeks), 12 h music group (Mozart K.448 music therapy 12 h/day for 2 weeks), and accelerated music group (reversely accelerated music therapy 12 h for 2 weeks, AM group). In experiment 2, the survived rats were randomly divied into three groups: MCAO group, 12 h music group (music therapy 12 h/day for 3 weeks), and 12 h music-R group (music therapy 12 h/day for 2 weeks and rest for 1 week). Three neuroscores were evaluated daily, starting on the first day after surgery until the end of the experiment. The rats were killed 3 weeks after MCAO surgery in experiment 1 or 4 weeks after surgery in experiment 2. Nissl staining of infart core, peri-infarct zone, and motor cortex was performed to assess neuronal survival and regeneration. Western blot and immunofluorescence were used to detect the expression and distribution of brain-derived neurotrophic factor (BDNF) and glial fibrillary acidic protein (GFAP) in ipsilateral hemispheres.Results: In the experiment of different music therapy doses, the motor function in the 12-h music group but not in the 1-h music group and AM group was significantly improved compared with that of the MCAO group. The BDNF protein level of the ipsilateral hemisphere motor cortex in the 12-h music group and the 1-h music group was higher than that of the MCAO group. The neurons and Nissl bodies were more in the 12-h music group than in the MCAO group. Immunofluorescence assay showed that a 12 h music therapy induces BDNF and GFAP accumulation at the damage boundary. In the experiment of different music therapy durations, 3 weeks music therapy (12 h music group) induced more longer cell synapses and more clearer cell-to-cell connections than 2 weeks music intervention (12 h music-R group). Moreover, the GFAP morphology in the 12-h music group was more similar to mature activated astrocytes than that in the 12-h music-R group.Conclusions: Music therapy may improve poststroke motor function and promote neuronal repair in the long term. The mechanism may be through stimulating BDNF and GFAP secretion in the injured motor cortex.
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- 2021
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11. Steric Effects on Electroosmotic Nano-Thrusters under High Zeta Potentials
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Jiaxuan Zheng, Siyi An, and Yongjun Jian
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electroosmotic nano-thrusters ,electroosmosis flow ,steric effect ,high wall zeta potentials ,Mathematics ,QA1-939 - Abstract
Here, space electroosmotic thrusters in a rigid nanochannel with high wall zeta potentials are investigated numerically, for the first time, considering the effect of finite size of the ionic species. The effect, which is called a steric effect, is often neglected in research about micro/nano thrusters. However, it has vital influences on the electric potential and flow velocity in electric double layers, so that the thruster performances generated by the fluid motion are further affected. These performances, including thrust, specific impulse, thruster efficiency, and the thrust-to-power ratio, are described by using numerical algorithms, after obtaining the electric potential and velocity distributions under high wall zeta potentials ranging from −25.7 mV to −128.5 mV. As expected, the zeta potential can promote the development of thruster performances so as to satisfy the requirement of space missions. Moreover, for real situation with consideration of the steric effect, the thruster thrust and efficiency significantly decrease to 5–30 micro Newtons and 80–90%, respectively, but the thrust-to-power ratio is opposite, and expends a short specific impulse of about 50–110 s.
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- 2021
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12. Steric Effects on Space Electroosmotic Thrusters in Soft Nanochannels
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Jiaxuan Zheng, Beinan Jia, and Yongjun Jian
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steric effects ,electroosmotic thrusters ,soft nanochannels ,electroosmotic flows ,ion size effects ,thruster performances ,Mathematics ,QA1-939 - Abstract
The influence of steric effects on the performances of space electroosmotic thrusters (EOTs) was numerically delineated in soft nanochannels for which its walls are covered with polyelectrolyte materials. The size effect of the ionic species, namely the steric effect, is neglected in many previous research studies, but it has vital influences on electrostatic potential and electroosmotic velocity, which is further introduced into the present study in order to understand and improve the exploration of nano electroosmotic thrusters with soft channels. The thruster’s thrust, specific impulse, total input power, thruster efficiency and thrust-to-power ratio are computed based on finite difference methods. It is found that the thruster’s thrust and specific impulse increase with the steric parameter while the efficiency and thrust-to-power ratio possess opposite trends due to the enhancement of Joule heating dissipation. For real situations with the consideration of ion size, although the thruster’s thrust could be promoted, the efficiency is only 30–70%, and the peak values of thrust-to-power ratio fade away.
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- 2021
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13. Space Electroosmotic Thrusters in Ion Partitioning Soft Nanochannels
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Jiaxuan Zheng and Yongjun Jian
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electroosmotic thrusters (EOTs) ,soft nanochannel ,ion partitioning effect ,polyelectrolyte layer (PEL) ,Mechanical engineering and machinery ,TJ1-1570 - Abstract
Space electroosmotic thrusters (EOTs) are theoretically investigated in a soft charged nanochannel with a dense polyelectrolyte layer (PEL), which is considered to be more realistic than a low-density PEL. When the PEL is dense, its permittivity is smaller than the one of the electrolyte solution layer, leading to rearrangement of ions in the channel, which is denoted as the ion partitioning effect. It is noted that fluid viscosity becomes high within the PEL owing to the hydration effect. An analytical solution for electroosmotic velocity through the channel is obtained by utilizing the Debye–Hückel linearization assumption. Based on the fluid motion, thruster performances, including thrust, specific impulse, thrust-to-power ratio, and efficiency, are calculated. The ion partitioning effect leads to enhancement of the thruster velocity, while increase of the dynamic viscosity inside the PEL reduces the flow rate of the fluid. Therefore, these performances are further impacted by the dense soft material, which are discussed in detail. Moreover, changes or improvements of the thruster performances from the dense PEL to the weak PEL are presented and compared, and distributions of various energy items are also provided in this study. There is a good result whereby the increase in electric double layer thickness promotes the development of thruster performances. Ultimately, the simulated EOTs produce thrust of about 0 to 20 μN and achieve thruster efficiency of 90.40%, while maintaining an appropriate thrust–power ratio of about 1.53 mN/W by optimizing all design parameters.
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- 2021
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14. Inter-rater Reliability of MyotonPRO for Assessing Muscle Mechanical Properties in Stroke Patients
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Yuan PENG, Jiaxuan ZHENG, Jin ZHANG, Shunxi ZHANG, Yujie CHEN, and Yue LAN
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stroke ,MyotonPRO ,muscle tone ,inter-rater reliability ,Medicine - Abstract
Objective:To examine the inter-rater reliability of MyotonPRO under B-ultrasound guidance in assessment of stroke patients'muscle tone.Methods:A total of 28 stroke patients were assessed their muscle mechanical properties of biceps brachii and flexor carpi radialis muscles in relaxed state with MyotonPRO under the B-ultrasound guidance by two testers within 24 hours. Inter-rater reliability of muscle properties was determined using intraclass correlation coefficient (ICC), the standard error of measurement (SEM), the minimal detectable change (MDC90) and Bland-Altman analysis were performed by SPSS.Results:The ICC was above 0.9 in the ten-time scan pattern. The SEM and MDC90of biceps brachii and flexor carpi radialis muscles indicated small measurement error (SEM%90%
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- 2018
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15. One-shot Biomedical Named Entity Recognition via Knowledge-Inspired Large Language Model.
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Junyi Bian, Jiaxuan Zheng, Yuyi Zhang, Hong Zhou, and Shanfeng Zhu
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- 2024
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16. VANER: Leveraging Large Language Model for Versatile and Adaptive Biomedical Named Entity Recognition.
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Junyi Bian, Weiqi Zhai, Xiaodi Huang, Jiaxuan Zheng, and Shanfeng Zhu
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- 2024
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17. Disparity Distribution Equalization: An Effective Data Enhancement for Stereo Matching.
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Jiaxuan Zheng, Jiayu Wu, Shuwen Xu 0003, Sidan Du, and Yang Li
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- 2024
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18. Barrier Lyapunov function-based command-filtered adaptive fuzzy control of random quadrotor systems.
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Hui Zhang 0078, Jiaxuan Zheng, Ximin Guan, and Liqiang Yao
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- 2024
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19. Command Filter-Based Adaptive Fuzzy Tracking Control of Stochastic Robotic Systems with Full State Constraints.
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Hui Zhang, Jiaxuan Zheng, and Likang Feng
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- 2023
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20. Inspire the Large Language Model by External Knowledge on BioMedical Named Entity Recognition.
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Junyi Bian, Jiaxuan Zheng, Yuyi Zhang, and Shanfeng Zhu
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- 2023
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21. Effect of Progressive Postural Control Exercise Versus Core Stability Exercise in Young Adults with Chronic Low Back Pain: A Randomized Controlled Trial
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Hongjiang Wang, Ziyan Fan, Xin Liu, Jiaxuan Zheng, Shanshan Zhang, Siyun Zhang, Qiuhua Yu, Wai Leung Ambrose Lo, Xi Chen, and Chuhuai Wang
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Anesthesiology and Pain Medicine ,Neurology (clinical) - Abstract
This study aimed to investigate the effects of progressive postural control exercise (PPCE) vs core stability exercise (CSE) in patients with chronic low back pain (CLBP).A total of 34 young-adult participants with CLBP were randomly assigned to two groups (the PPCE group and the CSE group). They received instructions for two different exercise training regimens persisting over 8 weeks. Before, after, and at 6 months after the intervention, the participants were evaluated on the basis of pain intensity (VAS), degree of dysfunction (ODI and RMDQ), contractility of transversus abdominis (TrA) and lumbar multifidus (MF), as well as the ability to control static posture.There was no significant difference between the results of the PPCE group and the CSE group. At the 6-month follow-up after the 8-week treatment, the scores of VAS, ODI, and RMDQ in the two groups decreased significantly compared to before (p 0.05). The percentage change in thickness of bilateral TrA and left MF (p 0.05) was elevated and the sway area of center of pressure during static stance tasks with eyes opened (p 0.05) was decreased in both groups.In the short term, PPCE provides positive effects similar to those of core stability exercise in patients with CLBP. The effective mechanism of PPCE might be the consequence of neuromuscular plasticity and adaptation adjustments. PPCE enriches the choices of treatment for CLBP.The trial was registered at www.chictr.org.cn , identifier ChiCTR2100043113.Chronic low back pain (CLBP) is a widespread disorder with highly recurrent prevalence. As of now, the treatment effects are not satisfactory, leading to a search for novel therapies that might work better in patients with CLBP. This study comprehensively explored the effects of progressive postural control exercise, as compared to core stability exercise, on patients with CLBP. The outcomes included pain intensity, disability of daily life, contractility of trunk muscles, and postural control. The results of the study showed that the efficacy of exercises in patients in the experimental group was similar to that of the control group and both exercise treatments improved the pain intensity, the disability, the contractile function of trunk muscle, as well as postural control in patients with CLBP in the short term. The mechanism of the effects of progressive postural control exercise might be the consequence of “neuromuscular plasticity” and adaptation adjustments.
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- 2022
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22. Integrating resilience into an urban flood risk assessment framework: a case study of the Minzhi region, Shenzhen City
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Jiaxuan Zheng and Guoru Huang
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Environmental Engineering ,Environmental Chemistry ,Safety, Risk, Reliability and Quality ,General Environmental Science ,Water Science and Technology - Published
- 2022
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23. High Oxygen Shocking Reduces Postharvest Disease and Maintains Satisfying Quality in Fresh Goji Berries during Cold Storage by Affecting Fungi Community Composition
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Liu, Shuangdi Hou, Gaopeng Zhang, Wei Zhao, Jiaxuan Zheng, Min Xue, Yanli Fan, and Xia
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fungi community ,high oxygen shocking ,goji berry ,quality - Abstract
Fresh goji (Lycium barbarum L.) berries were treated with high-concentration (50% and 90%) oxygen shocking for 30 min and then stored at 0 ± 0.5 °C for 30 d. Decay, aerobic plate count, firmness, weight loss, total soluble solid (TSS), and titratable acidity (TA) were evaluated during storage. A total of 90% O2 shocking more effectively reduced decay and maintained the weight loss and firmness of goji berries. Subsequently, changes in fungi communities were analyzed using high-throughput sequencing (HTS) in the 90% O2-shocking and control groups. The results showed that 90% O2 shocking retained the richness and diversity of fungi communities and the microbiome was related to the quality properties of the fruit. Thus, we inferred that high oxygen shocking inhibited the development of natural decay and maintained the satisfying quality of goji berries by affecting the fungi community composition, which reduced the growth of pathogenic fungi and harmful saprotrophic fungi in the genera, such as Filobasidium sp., Alternaria sp., and Cladosporium sp. We provide a new insight into the disease development and quality changes during the storage of postharvest goji berries.
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- 2023
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24. Transcription factor FOXP1 mediates vascular endothelial dysfunction in diabetic retinopathy
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Yekai, Zhou, Yaling, Xuan, Yi, Liu, Jiaxuan, Zheng, Xiaoyun, Jiang, Yun, Zhang, Jian, Zhao, Yanli, Liu, and Meixia, An
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Adult ,Vascular Endothelial Growth Factor A ,Diabetic Retinopathy ,Vascular Endothelial Growth Factors ,Endothelial Cells ,Forkhead Transcription Factors ,Middle Aged ,Sensory Systems ,Repressor Proteins ,Cellular and Molecular Neuroscience ,Ophthalmology ,Glucose ,Human Umbilical Vein Endothelial Cells ,Diabetes Mellitus ,Humans ,Transcription Factors ,Cell Proliferation - Abstract
Diabetic retinopathy (DR) is still the fastest growing cause of blindness in working aged adults, and its typical characteristics are endothelial cell dysfunction and pericytes loss. Transcription factor fork head box P1 (FOXP1) is a member of FOX family involved in diabetes progression and is expressed in endothelial cells. The purpose of this study was to investigate the role and mechanism of FOXP1 in DR.The vitreous of DR patients and non-DR patients were collected, and the expression of FOXP1 was detected by real-time polymerase chain reaction (RT-qPCR) and enzyme-linked immunosorbent assay (ELISA). Human umbilical vein endothelial cells (HUVECs) cultured in high glucose simulated DR environment, and the expressions of FOXP1, vascular endothelial growth factor (VEGF), and pigment epithelium derived factor (PEDF) were detected by RT-qPCR and western blot (WB) after transfection of small interfering RNA (siRNA) to knock out FOXP1. At the same time, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay (MTT), 5-ethynyl-2'-deoxyuridine assay (EDU), flow cytometry, Transwell assay, and tube-forming experiment were performed to determine cell proliferation, migration, and tube-forming ability.We found that FOXP1 was highly expressed in the vitreous of DR patients and HUVECs under high glucose condition. After FOXP1 was decreased, the activation of VEGF expression and inhibition of PEDF expression in HUVECs induced by high glucose were reversed; meanwhile, cell proliferation, migration, and tube formation decreased, and apoptosis was promoted.Generally, FOXP1 is highly expressed in the vitreous of DR patients, and its silence prevented VEGF/PEDF signaling pathway stimulated by high glucose and also reduced the proliferation, migration, and tube formation of endothelial cell, thus improving vascular endothelial dysfunction caused by DR. The results indicate that FOXP1 may be a therapeutic target of DR.
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- 2022
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25. Impaired static postural control correlates to the contraction ability of trunk muscle in young adults with chronic non-specific low back pain: A cross-sectional study
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Yi Wu, Qiuhua Yu, Xue Cheng, Wai Leung Ambrose Lo, Jiajia Yang, Ziyan Fan, Chuhuai Wang, Hongjiang Wang, Jiaxuan Zheng, Siyun Zhang, and Zichong Luo
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medicine.medical_specialty ,Contraction (grammar) ,Cross-sectional study ,business.industry ,Rehabilitation ,Paraspinal Muscles ,Biophysics ,Core stability ,Low back pain ,Contractility ,Young Adult ,Cross-Sectional Studies ,Physical medicine and rehabilitation ,Lumbar ,Humans ,Medicine ,Orthopedics and Sports Medicine ,medicine.symptom ,Young adult ,business ,Low Back Pain ,Postural Balance ,Abdominal Muscles ,Muscle Contraction ,Center of pressure (fluid mechanics) - Abstract
Patients with chronic non-specific low back pain (CNSLBP) were found with impaired postural control in previous studies. Since the trunk muscle take important efforts on core stability, the study aimed to examine the relationships of postural control during stance tasks and the contractility of trunk muscle in young adults with CNSLBP and without.Healthy individuals (n = 25) and individuals with CNSLBP (n = 30) were included. The thickness of the bilateral transversus abdominis (TrA) and lumbar multifidus (MF) was measured during rest and maximal voluntary contraction, and the change percentages (TrA%, MF%) were calculated. Regarding postural control, COP path length and sway area during the stance tasks were measured thrice in each group.The bilateral TrA% of the CNSLBP group was less than that of the HC group (p 0.05). The bilateral TrA% of the CNSLBP group was less than that of the HC group (p 0.05). The bilateral MF% showed no significantly different(p 0.05) between the two groups. Compared with healthy controls, CNSLBP patients resulted larger path length and sway area of COP during most of static stance tasks. During the EO task in the CNSLBP group, TrA% was found correlate to COP path length (p 0.05); the right MF% was correlated with COP sway area (p 0.05). No significant correlations appeared in the healthy controls (p 0.05).Compared with healthy individuals, impaired postural control during static stance with eyes open in patients with CNSLBP was likely to be related to the poor contraction ability of bilateral transversus abdominis and correlated to the normal contraction ability of right lumbar multifidus.
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- 2022
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26. A novel postharvest preservation technology of fruit—Intermittent high oxygen treatment: A case study on 'Lingwu' long jujube
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Shuangdi Hou, Qian Yang, Jiaxuan Zheng, and Xia Liu
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General Chemical Engineering ,General Chemistry ,Food Science - Published
- 2022
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27. A novel grid cell–based urban flood resilience metric considering water velocity and duration of system performance being impacted
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Jiaxuan Zheng and Guoru Huang
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Water Science and Technology - Published
- 2023
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28. Different Electrical Properties of Paraspinal Muscle in Young Adults With Non-specific Chronic Low Back Pain and Healthy Individuals by Electrical Impedance Myography: A Cross-sectional Study
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Chuhuai Wang, Le Li, Jiaxuan Zheng, Wai Leung Ambrose Lo, Hongjiang Wang, Ziyan Fan, and Qiuhua Yu
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medicine.medical_specialty ,Physical medicine and rehabilitation ,Non specific ,Electrical impedance myography ,Cross-sectional study ,business.industry ,Healthy individuals ,Medicine ,Young adult ,business ,Paraspinal Muscle ,Chronic low back pain - Abstract
BackgroundNon-specific chronic low back pain (NSCLBP) is a multifactor disorder with high prevalence rate of people all around the world. Lumbar paraspinal muscle (LPM) plays an important role of spine stabilization. However, the electrical properties of LPM in the patients were unclear. Aim to explore the electrical properties of bilateral LPM between patients with NSCLBP and healthy controls (HC), the study was designed to applied electrical impedance myography (EIM) technique to measure the LPM.MethodsA total of thirty participates (15 in NSCLBP group, 15 in HC group) were instructed to have each side of LPM measured at the rest state and the maximum volunteer contraction (MVC) state. Then measured the EIM parameters of LPM at L4/5 level by a multi-frequency device. Each measurement repeated three times. The EIM parameters at 50 kHz, 100 kHz, 200 kHz current frequencies were enrolled into the statistical analysis.ResultsAt the three current frequencies, parameters in the right side of LPM had not significantly difference from the left (P>0.05, respectively). Resistance (R) of LPM in NSCLBP group was larger than that in HC group (PPP>0.05, respectively). At 50 kHz, relationships between the EIM parameters and geometric parameters of LPM were not significant in NSCLBP group or HC group (P>0.05, respectively).ConclusionThe electrical properties of bilateral LPM in young adults with NSCLBP were different from those of healthy individuals regardless of any current frequency. The ultrasound parameters of LPM, however, showed no significant difference between young patients with NSCLBP and healthy participants. EIM measurement might be more sensitive than rehabilitative ultrasound for NSCLBP in young adults.Trial registrationThe Chinese Clinical trial registration number: ChiCTR2100043113.
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- 2021
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29. The Effect of Soybean Peptides on Improving Quality and the ACE Inhibitory Bioactivity of Extruded Rice
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Shuangdi Hou, Jiafeng Zhao, Yuan Zu, Jiaxuan Zheng, Chunyu Wang, and Xia Liu
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Process Chemistry and Technology ,Chemical Engineering (miscellaneous) ,Bioengineering ,soybean protein ,random peptide ,extruded cooking rice ,blood pressure ,ACE inhibition rate - Abstract
It is crucial to address the dietary problems of hypertensive patients. The effect and mechanism of different contents of soybean protein on cooking quality and angiotensin-converting enzyme (ACE) inhibitory action in the extruded rice were firstly investigated. The results showed that the extruded rice with soybean protein possessed the higher taste value (90.32 ± 2.31), hardness (2.65 ± 0.01 g), and good pasting quality (p ≤ 0.05). Meanwhile, the soybean protein notably retarded the starch digestibility; the sample with 6% soybean protein showed the fewest rapidly digestible starch (RDS) content (78.82 ± 0.01 mg g−1) and the most slowly digestible starch (SDS) content (8.97 ± 0.45 mg g−1). Importantly, the ACE inhibition rate improved from 17.09 ± 0.01% to 74.02 ± 0.65% in the 6% soybean protein sample because of the production of peptides. The peptide composition of samples were compared, which showed that the effective ACE-inhibitory peptides usually contain 2~20 amino acids, and Pro, Leu, Ile, Val, Phe, and Ala were the main components. Overall, moderate soybean protein would give a good quality and lower ACE activity in extruded food.
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- 2022
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30. Music Therapy Alleviates Motor Dysfunction in Rats With Focal Cerebral Ischemia–Reperfusion Injury by Regulating BDNF Expression
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Guangyu Shen, Linlin Sun, Weiguan Chen, Xin Ji, Jin-hua Gu, Feng Xu, Xia Li, and Jiaxuan Zheng
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Music therapy ,middle cerebral artery occlusion ,behavioral disciplines and activities ,03 medical and health sciences ,symbols.namesake ,0302 clinical medicine ,medicine ,music ,RC346-429 ,Stroke ,Rest (music) ,030304 developmental biology ,Original Research ,Brain-derived neurotrophic factor ,0303 health sciences ,Glial fibrillary acidic protein ,biology ,business.industry ,medicine.disease ,humanities ,medicine.anatomical_structure ,Neurology ,nervous system ,Anesthesia ,brain derived neurotrophic factor ,glial fibrillary acidic protein ,biology.protein ,Nissl body ,symbols ,Neurology (clinical) ,Neurology. Diseases of the nervous system ,business ,Reperfusion injury ,human activities ,motor dysfunction ,030217 neurology & neurosurgery ,Motor cortex - Abstract
Background/Aim: Music-based therapy plays a role in central nervous system diseases. We aimed to explore the effect of different doses and durations of music therapy on motor function recovery after stroke and the underlying molecular mechanisms.Methods: Adult male Sprague–Dawley rats were subjected to middle cerebral artery occlusion (MCAO) for 1 h, which was followed by reperfusion. In experiment 1, the rats that survived 1 week after MCAO surgery were randomly allocated into four groups (n = 10 per group): MCAO group, 1 h music group (Mozart K.448 music therapy 1 h per day for 2 weeks), 12 h music group (Mozart K.448 music therapy 12 h/day for 2 weeks), and accelerated music group (reversely accelerated music therapy 12 h for 2 weeks, AM group). In experiment 2, the survived rats were randomly divied into three groups: MCAO group, 12 h music group (music therapy 12 h/day for 3 weeks), and 12 h music-R group (music therapy 12 h/day for 2 weeks and rest for 1 week). Three neuroscores were evaluated daily, starting on the first day after surgery until the end of the experiment. The rats were killed 3 weeks after MCAO surgery in experiment 1 or 4 weeks after surgery in experiment 2. Nissl staining of infart core, peri-infarct zone, and motor cortex was performed to assess neuronal survival and regeneration. Western blot and immunofluorescence were used to detect the expression and distribution of brain-derived neurotrophic factor (BDNF) and glial fibrillary acidic protein (GFAP) in ipsilateral hemispheres.Results: In the experiment of different music therapy doses, the motor function in the 12-h music group but not in the 1-h music group and AM group was significantly improved compared with that of the MCAO group. The BDNF protein level of the ipsilateral hemisphere motor cortex in the 12-h music group and the 1-h music group was higher than that of the MCAO group. The neurons and Nissl bodies were more in the 12-h music group than in the MCAO group. Immunofluorescence assay showed that a 12 h music therapy induces BDNF and GFAP accumulation at the damage boundary. In the experiment of different music therapy durations, 3 weeks music therapy (12 h music group) induced more longer cell synapses and more clearer cell-to-cell connections than 2 weeks music intervention (12 h music-R group). Moreover, the GFAP morphology in the 12-h music group was more similar to mature activated astrocytes than that in the 12-h music-R group.Conclusions: Music therapy may improve poststroke motor function and promote neuronal repair in the long term. The mechanism may be through stimulating BDNF and GFAP secretion in the injured motor cortex.
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- 2021
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31. Factors Influencing the Progression of Patellofemoral Articular Cartilage Damage After Anterior Cruciate Ligament Reconstruction
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Hui, Huang, Zhengzhao, Li, Shishi, Luo, Jiaxuan, Zheng, Gang, Zhou, and Guangji, Wang
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Orthopedics and Sports Medicine - Abstract
Background: Although anterior cruciate ligament reconstruction (ACLR) can restore the stability and function of the knee joint, patellofemoral joint cartilage damage still progresses. Currently, the clinically important factors that lead to the progression of patellofemoral articular cartilage damage are not fully understood. Purpose: To investigate the factors that affect the progression of patellofemoral articular cartilage damage after ACLR. Study Design: Cohort study; Level of evidence, 2. Methods: Among 160 patients who underwent ACLR between January 2015 and December 2019, the authors evaluated 129 patients for at least 1 year after surgery. Within 1 week before ACLR and at the last follow-up, patients underwent subjective functional assessment and magnetic resonance imaging evaluations of articular cartilage damage (modified Outerbridge assessment). At the last follow-up, the side-to-side difference on KT-2000 arthrometer and bilateral quadriceps muscle strength were measured. Univariate and multivariate logistic regression analyses were performed. Results: The mean follow-up was 24.69 ± 10.74 months. Progression of patellar cartilage damage from preoperatively to final follow-up was seen in 45 patients ( P < .001). Logistic regression analysis revealed that the follow-up period ( P = .047; odds radio (OR) = 0.953) (improvement of patellar cartilage damage with longer follow-up), partial lateral meniscal resection ( P = .004; OR = 6.929), partial medial meniscal resection ( P = .004; OR = 6.032), and quadriceps muscle strength Conclusion: Cartilage damage at the patellofemoral joint, especially the patellar cartilage, still progresses after ACLR. At a mean follow-up of 24.69 months after ACLR, partial meniscal resection and quadriceps femoris muscle strength were found to be the main risk factors for the progression of patellofemoral articular cartilage damage after ACLR.
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- 2022
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32. Identifcation of Pathways and Genes Associated With Meniscus Degeneration Using Bioinformatics Analyses
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Wei Wang, Hui Huang, Ming Deng, Jianping Lin, Yehan Fang, Guangji Wang, Haiquan Tian, and Jiaxuan Zheng
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body regions ,Pathology ,medicine.medical_specialty ,medicine.anatomical_structure ,medicine ,Degeneration (medical) ,Meniscus (anatomy) ,Biology ,musculoskeletal system ,Gene - Abstract
There are few studies on the genetic changes of meniscus degeneration. We used anterior cruciate ligament resection of Wuzhishan pig to prepare a meniscus degeneration model, and applied gene chip technology to detect differentially expressed genes in degenerative meniscus tissue. Then we applied GO analysis, Pathway analysis, Core gene network analysis and Relevant miRNAs analysis to discover relevant regulatory networks of meniscus degeneration. As a result, we detected 893 differentially expressed genes, mainly involving hormone, apoptosis, inflammation and other mechanisms, and obtained MUC13, Inflammatory mediator regulation of TRP channels, MDFI, mir-335-5p and so on that may play a key role. In summary, we have established a reliable animal model of meniscus degeneration and found that meniscus degeneration involves several possible molecular mechanisms, which will provide molecular targets for further research of the disease in the future.
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- 2021
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33. Identification of pathways and genes associated with synovitis in osteoarthritis using bioinformatics analyses
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Jiaxuan Zheng, Jianping Lin, Guangji Wang, Yehan Fang, Gang Zhou, Ningjiang Shen, Jianning Zhao, and Hui Huang
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0301 basic medicine ,Neuroblastoma RAS viral oncogene homolog ,lcsh:Medicine ,Biology ,Bioinformatics ,CXCR4 ,Article ,03 medical and health sciences ,GNAI2 ,Synovitis ,Gene expression ,Databases, Genetic ,Osteoarthritis ,medicine ,Humans ,Gene Regulatory Networks ,Protein Interaction Maps ,lcsh:Science ,Gene ,Multidisciplinary ,Gene Expression Profiling ,Synovial Membrane ,lcsh:R ,Computational Biology ,medicine.disease ,Microarray Analysis ,SPHK2 ,030104 developmental biology ,Gene Ontology ,lcsh:Q ,Signal transduction ,Transcriptome ,Signal Transduction - Abstract
Synovitis in osteoarthritis (OA) is a very common condition. However, its underlying mechanism is still not well understood. This study aimed to explore the molecular mechanisms of synovitis in OA. The gene expression profile GSE82107 (downloaded from the Gene Expression Omnibus database) included 10 synovial tissues of the OA patients and 7 synovial tissues of healthy people. Subsequently, differentially expressed gene (DEG) analysis, GO (gene ontology) enrichment analysis, pathway analysis, pathway network analysis, and gene signal network analysis were performed using Gene-Cloud of Biotechnology Information (GCBI). A total of 1,941 DEGs consisting of 1,471 upregulated genes and 470 downregulated genes were determined. Genes such as PSMG3, LRP12 MIA-RAB4B, ETHE1, SFXN1, DAZAP1, RABEP2, and C9orf16 were significantly regulated in synovitis of OA. In particular, the MAPK signalling pathway, apoptosis, and pathways in cancer played the most important roles in the pathway network. The relationships between these pathways were also analysed. Genes such as NRAS, SPHK2, FOS, CXCR4, PLD1, GNAI2, and PLA2G4F were strongly implicated in synovitis of OA. In summary, this study indicated that several molecular mechanisms were implicated in the development and progression of synovitis in OA, thus improving our understanding of OA and offering molecular targets for future therapeutic advances.
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- 2018
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34. Rotating electroosmotic flow of two-layer fluids through a microparallel channel
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Jiaxuan Zheng and Yongjun Jian
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Physics ,Mechanical Engineering ,Charge density ,Angular velocity ,02 engineering and technology ,Mechanics ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,010305 fluids & plasmas ,Physics::Fluid Dynamics ,Electrokinetic phenomena ,Viscosity ,Flow velocity ,Mechanics of Materials ,0103 physical sciences ,Shear stress ,Newtonian fluid ,General Materials Science ,Boundary value problem ,0210 nano-technology ,Civil and Structural Engineering - Abstract
In this study, rotating electroosmotic flow of two immiscible fluids in a microparallel channel is investigated. The electric double layer (EDL) potential distribution is considered by using linear Poisson–Boltzmann (P-B) equation. Based upon the analytical charge density distribution, an analytical solution of flow velocity can be obtained by solving the modified Navier–Stokes (N-S) equation in the rotating frame. Besides, the equilibrium condition of stress, including shear stress and Maxwell stress, is taken into account as boundary conditions at the interface to analyze the distribution of the two-layer fluids velocity. It is found that, due to the rotational effect of the microchannel, the Coriolis force can generate a (secondary) transverse flow in horizontal direction perpendicular to the mainstream direction and the velocity amplitude of two-layer fluids has a reduced flow along the mainstream direction. In addition, the results indicate that double fluid velocity distribution is strongly influenced by several non-dimensional parameters, such as the dielectric constant ratio e, density ratio ρ, viscosity ratio μ of the two layer fluids, rotating angular velocity ω, interface zeta potential difference Δφ*, interface charge density jump Q, the normalized thickness of two layer Newtonian fluids h1*, h2* and electrokinetic width K1, K2. Smaller μ and larger e, Δφ* lead to larger velocity amplitude for lower fluid (noted as fluid II), but an opposite trend can be found for upper fluid (namely fluid I). The increase of Q or decrease of ρ leads to the increases of velocity amplitude for both fluid I and fluid II. Furthermore, interestingly, we observe that the mainstream speed at the interface does not depend on the interface zeta potential difference Δφ*, the dielectric constant ratio e and electrokinetic width K2 of fluid II when the depths of h1* and h2* are identical.
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- 2018
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35. Space Electroosmotic Thrusters in Ion Partitioning Soft Nanochannels
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Yongjun Jian and Jiaxuan Zheng
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Permittivity ,soft nanochannel ,Materials science ,Thrust ,02 engineering and technology ,Electrolyte ,electroosmotic thrusters (EOTs) ,010402 general chemistry ,01 natural sciences ,Article ,Ion ,Linearization ,TJ1-1570 ,Mechanical engineering and machinery ,Electrical and Electronic Engineering ,Mechanical Engineering ,ion partitioning effect ,polyelectrolyte layer (PEL) ,Mechanics ,021001 nanoscience & nanotechnology ,Polyelectrolyte ,0104 chemical sciences ,Volumetric flow rate ,Control and Systems Engineering ,Specific impulse ,0210 nano-technology - Abstract
Space electroosmotic thrusters (EOTs) are theoretically investigated in a soft charged nanochannel with a dense polyelectrolyte layer (PEL), which is considered to be more realistic than a low-density PEL. When the PEL is dense, its permittivity is smaller than the one of the electrolyte solution layer, leading to rearrangement of ions in the channel, which is denoted as the ion partitioning effect. It is noted that fluid viscosity becomes high within the PEL owing to the hydration effect. An analytical solution for electroosmotic velocity through the channel is obtained by utilizing the Debye–Hückel linearization assumption. Based on the fluid motion, thruster performances, including thrust, specific impulse, thrust-to-power ratio, and efficiency, are calculated. The ion partitioning effect leads to enhancement of the thruster velocity, while increase of the dynamic viscosity inside the PEL reduces the flow rate of the fluid. Therefore, these performances are further impacted by the dense soft material, which are discussed in detail. Moreover, changes or improvements of the thruster performances from the dense PEL to the weak PEL are presented and compared, and distributions of various energy items are also provided in this study. There is a good result whereby the increase in electric double layer thickness promotes the development of thruster performances. Ultimately, the simulated EOTs produce thrust of about 0 to 20 μN and achieve thruster efficiency of 90.40%, while maintaining an appropriate thrust–power ratio of about 1.53 mN/W by optimizing all design parameters.
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- 2021
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36. The effect of ultrasonic on reducing anti-browning minimum effective concentration of purslane extract on fresh-cut potato slices during storage
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Jiaxuan Zheng, Xun You, Hui Liu, Xia Liu, Xinru Du, Ting Wang, and Yinxia Zhu
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Purslane extract ,Color ,Portulaca ,01 natural sciences ,Polyphenol oxidase ,Antioxidants ,Permeability ,Analytical Chemistry ,0404 agricultural biotechnology ,Browning ,Ultrasonics ,Food science ,Peroxidase ,Solanum tuberosum ,biology ,Plant Extracts ,Chemistry ,010401 analytical chemistry ,Electric Conductivity ,04 agricultural and veterinary sciences ,General Medicine ,040401 food science ,0104 chemical sciences ,Antioxidant capacity ,Point of delivery ,Food Storage ,Ultrasonic cavitation ,biology.protein ,Ultrasonic sensor ,Catechol Oxidase ,Food Science - Abstract
Enzymatic browning is one of the major difficulties for the preservation and commercial value of fresh-cut products. To research more healthy and inexpensive anti-browning methods, we investigated the effect of ultrasonic coupling purslane extract on the browning resistance of fresh-cut potato during 8d storage at 4 °C. Firstly, the optimal ultrasonic time (10 min) was obtained. Then, the results showed that the combined application with lower purslane extract concentration (0.02%, w/w) could achieve a better anti-browning effect than the optimal concentration of alone purslane extract (0.05%, w/w). The combined application not only significantly inhibited the key enzyme activities of polyphenol oxidase (PPO) and peroxidase (POD), but also effectively reduced the damage to cell membrane, maintained its integrity and permeability. Meanwhile, it also improved antioxidant capacity during storage. Overall, the ultrasonic cavitation combined with purslane extract would be a promising method for fresh-cut industry.
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- 2021
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37. Chronic inflammation-associated genomic instability paves the way for human esophageal carcinogenesis
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Zhijin Lei, Donglin Chen, Min Su, Jiaxuan Zheng, Dongping Tian, Runhua Lin, Chong Zhang, and Zexin Xu
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Adult ,Male ,0301 basic medicine ,Genome instability ,chronic inflammation ,medicine.medical_specialty ,Pathology ,Esophageal Neoplasms ,Carcinogenesis ,DNA damage ,Inflammation ,Biology ,medicine.disease_cause ,Gastroenterology ,oxidative DNA damage ,Histones ,03 medical and health sciences ,Esophagus ,0302 clinical medicine ,esophageal carcinogenesis ,Internal medicine ,Immunopathology ,medicine ,DNA double-strand breaks ,Humans ,Aged ,Clinical pathology ,Deoxyguanosine ,Middle Aged ,genomic instability ,Immunohistochemistry ,030104 developmental biology ,medicine.anatomical_structure ,Oncology ,8-Hydroxy-2'-Deoxyguanosine ,030220 oncology & carcinogenesis ,Chronic Disease ,Carcinoma, Squamous Cell ,Disease Progression ,Female ,medicine.symptom ,Research Paper ,DNA Damage - Abstract
// Runhua Lin 1, * , Chong Zhang 1, * , Jiaxuan Zheng 1, * , Dongping Tian 1 , Zhijin Lei 1 , Donglin Chen 1 , Zexin Xu 1 , Min Su 1 1 Institute of Clinical Pathology, Guangdong Provincial Key Laboratory of Infectious Disease and Molecular Immunopathology, Shantou University Medical College, Shantou, Guangdong, 515031, PR China * These authors contributed equally to this work Correspondence to: Min Su, e-mail: minsu@stu.edu.cn Keywords: esophageal carcinogenesis, chronic inflammation, oxidative DNA damage, DNA double-strand breaks, genomic instability Received: November 16, 2015 Accepted: March 06, 2016 Published: March 25, 2016 ABSTRACT Chronic inflammation is associated with increased risk of cancer development, whereas the link between chronic inflammation and esophageal carcinogenesis is still obscure heretofore. This study aimed to investigate the relationship between chronic inflammation and DNA damage, as well as the possible role of DNA damage in esophageal carcinogenic process. Endoscopic esophageal biopsies from 109 individuals from Chaoshan littoral, a high-risk region for esophageal squamous cell carcinoma (ESCC), were examined to evaluate the association between chronic inflammation and histological severity, while additional 204 esophageal non-tumor samples from patients with ESCC were collected. Immunohistochemistry was performed to detect the oxidative DNA damage and DNA double-strand breaks (DSBs). Significantly positive correlation was observed between degree of chronic inflammation and esophageal precursor lesions ( r s = 0.37, P < 0.01). Immunohistochemical analysis showed that oxidative DNA damage level was positively correlated with the degree of chronic inflammation ( r s = 0.21, P < 0.05). Moreover, the level of oxidative DNA damage positively correlated with histological severity ( r s = 0.49, P < 0.01). We found that the extent of DSBs was progressively increased with inflammation degree ( P < 0.01) and the progression of precancerous lesions ( P < 0.001). Collectively, these findings provide evidence linking chronic inflammation-associated genomic instability with esophageal carcinogenesis and suggest possibilities for early detection and intervention of esophageal carcinogenesis.
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- 2016
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38. Electroosmotic thrusters in soft nanochannels for space propulsion
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Yongjun Jian and Jiaxuan Zheng
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Fluid Flow and Transfer Processes ,Physics ,Spacecraft propulsion ,Mechanics of Materials ,business.industry ,Mechanical Engineering ,Computational Mechanics ,Aerospace engineering ,Condensed Matter Physics ,business - Published
- 2020
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39. Pichia kudriavzevii retards fungal decay by influencing the fungal community succession during cherry tomato fruit storage
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Jiaxuan Zheng, Yishan Jiang, Yuan Li, Hongyuan Yang, Yu Gao, Xia Liu, and Limei Li
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education.field_of_study ,food.ingredient ,biology ,Microbiota ,Population ,Cold storage ,Sporidiobolus ,biology.organism_classification ,Alternaria ,Microbiology ,Pichia ,Yeast ,Horticulture ,food ,Biological Control Agents ,Food Storage ,Solanum lycopersicum ,Cherry tomato ,Fruit ,Antibiosis ,education ,Mycobiome ,Food Science ,Botrytis - Abstract
In this study, P. kudriavzevii was isolated and identified as an effective antagonistic yeast, which could significantly inhibit the rotting rate, weight loss, and delay the color change, with no effect on total soluble solids (TSS), titratable acid (TA), or firmness during cherry tomato storage. High-throughput sequencing was used to survey the effect of P. kudriavzevii on fungal community throughout cold storage. The results showed that the biological succession of predominant pathogens was disrupted by P. kudriavzevii. The abundance of Botrytis and Alternaria was higher in the control than upon P. kudriavzevii treatment at 28 d, but some yeast genera such as Naganishia, Wickerhamomyces, and Cutaneotrichosporon at 14 d, Pichia and Sporidiobolus at 21 d, and Cystofilobasidium at 28 d, had relatively higher abundances in P. kudriavzevii treatments than the control. Oddly, as an antagonist agent, P. kudriavzevii was not the dominant population, indicating that altering the course of succession of the fungal community may be an effective mechanism of antagonistic yeast. Furthermore, the total network correlation analysis of fungal community revealed that the community development was more dependent on similarities in function than on taxonomic relationships.
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- 2020
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40. Effect of high oxygen pretreatment of whole tuber on anti-browning of fresh-cut potato slices during storage
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Xinru Du, Qian Yang, Ying Liu, Deng Xudong, Yuzhuo Lu, Jiaxuan Zheng, Yuan Li, Xia Liu, Ting Wang, and Liping Qiao
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Food Handling ,chemistry.chemical_element ,Phenylalanine ammonia-lyase ,01 natural sciences ,Polyphenol oxidase ,Oxygen ,Antioxidants ,Analytical Chemistry ,chemistry.chemical_compound ,0404 agricultural biotechnology ,Phenols ,Malondialdehyde ,Browning ,Food science ,Peroxidase ,Phenylalanine Ammonia-Lyase ,Solanum tuberosum ,biology ,Chemistry ,010401 analytical chemistry ,food and beverages ,04 agricultural and veterinary sciences ,General Medicine ,040401 food science ,0104 chemical sciences ,Plant Tubers ,Point of delivery ,biology.protein ,Limiting oxygen concentration ,Oxidation-Reduction ,Catechol Oxidase ,Food Science - Abstract
The surface browning usually occurs on fresh-cut potato during storage. The effect of short-time high oxygen pretreatment on anti-browning of fresh-cut potato slices was investigated. The whole potato tubers were firstly immersed in the oxygen concentration of 21%, 60% and 80% for 20 min. Then, the potatoes were peeled, cut and stored at 4 °C for 8 days. The results showed that the short-time 80% oxygen pretreatment possessed significantly anti-browning effect by retarding the increase of polyphenol oxidase (PPO) activity and the accumulation of malondialdehyde (MDA) content, maintaining the cell integrity. Meanwhile, the 80% oxygen treatment could increase the activities of phenylalanine ammonia lyase (PAL) and peroxidase (POD), and the total phenolic content. Importantly, the 80% oxygen treatment could effectively improve the antioxidant capacity. Overall, all results suggest that the short-time high oxygen pretreatment holds great promise on anti-browning of fresh-cut potato.
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- 2019
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41. Genetic Alterations in Esophageal Tissues From Squamous Dysplasia to Carcinoma
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Shanshan Zhuang, Songmin Ying, Min Su, Guoqiang Zhang, Min Zhang, Juan Ji, Jiaxuan Zheng, Su Xue, Yuping Chen, Chong Zhang, Zexin Xu, Yi Guo, Huan Yu, Ruijing Yan, Guo-Hong Zhang, Runhua Lin, Caiwen Du, Shaobin Chen, Songnian Hu, Yuan Wang, Dongping Tian, Jiancheng Cui, Moshe Marom, Yuanning Guo, Li Ruiqiang, Qi Zheng, Sitong Sheng, Wanting Deng, Xi Liu, Xiang Li, and Shiyue Qiu
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0301 basic medicine ,DNA Copy Number Variations ,DNA Repair ,Esophageal Neoplasms ,NF-E2-Related Factor 2 ,DNA Mutational Analysis ,Apoptosis ,Biology ,medicine.disease_cause ,03 medical and health sciences ,Esophagus ,CDKN2A ,medicine ,Carcinoma ,Cell Adhesion ,Cyclin-Dependent Kinase Inhibitor p18 ,Esophagitis ,Humans ,APOBEC Deaminases ,neoplasms ,Cyclin-Dependent Kinase Inhibitor p16 ,Phylogeny ,Cell Proliferation ,Intraepithelial neoplasia ,Hyperplasia ,Hepatology ,Chromosomes, Human, Pair 11 ,SOXB1 Transcription Factors ,Gastroenterology ,High-Throughput Nucleotide Sequencing ,Esophageal cancer ,medicine.disease ,digestive system diseases ,Esophageal Tissue ,030104 developmental biology ,medicine.anatomical_structure ,Chromosomes, Human, Pair 2 ,Cancer research ,Carcinoma, Squamous Cell ,Immunohistochemistry ,Chromosomes, Human, Pair 3 ,Tumor Suppressor Protein p53 ,Carcinogenesis ,Chromosomes, Human, Pair 9 ,Carcinoma in Situ - Abstract
Background & Aims Esophageal squamous cell carcinoma (ESCC) is the most common subtype of esophageal cancer. Little is known about the genetic changes that occur in esophageal cells during the development of ESCC. We performed next-generation sequence analyses of esophageal nontumor, intraepithelial neoplasia (IEN), and ESCC tissues from the same patients to track genetic changes during tumor development. Methods We performed whole-genome, whole-exome, or targeted sequence analyses of 227 esophageal tissue samples from 70 patients with ESCC undergoing resection at Shantou University Medical College in China from 2012 through 2015 (no patients had received chemotherapy or radiation therapy); we analyzed normal tissues, tissues with simple hyperplasia, dysplastic tissues (IEN), and ESCC tissues collected from different regions of the esophagus at the same time. We also obtained 1191 nontumor esophageal biopsy specimens from the Chaoshan region (a high-risk region for ESCC) of China (a high-risk region for ESCC) and performed immunohistochemical and histologic analyses to detect inflammation. Results IEN and ESCC tissues had similar mutations and copy number alterations, at similar frequencies; these differed from mutations detected in tissues with simple hyperplasia. IEN tissues had mutations associated with apolipoprotein B messenger RNA editing enzyme, catalytic polypeptide-like–mediated mutagenesis (a DNA damage mutational signature). Genetic analyses indicated that most ESCCs were formed from early stage IEN clones. Trunk mutations (mutations shared by >10% of paired IEN and ESCC tissues) were in genes that regulate DNA repair and cell apoptosis, proliferation and adhesion. Mutations in TP53 and CDKN2A and copy number alterations in 11q (contains CCND1 ), 3q (contains SOX2 ), 2q (contains NFE2L2 ), and 9p (contains CDKN2A ) were considered to be trunk variants; these were dominant mutations detected at high frequencies in clones of paired IEN and ESCC samples. In the esophageal biopsy samples from high-risk individuals (residing in the Chaoshan region), 68.9% had an evidence of chronic inflammation; the level of inflammation was correlated with atypical cell structures and markers of DNA damage. Conclusions We analyzed mutations and gene copy number changes in nontumor, IEN, and ESCC samples, collected from 70 patients. IEN and ESCCs each had similar mutations and markers of genomic instability, including apolipoprotein B messenger RNA editing enzyme, catalytic polypeptide-like. Genomic changes observed in precancerous lesions might be used to identify patients at risk for ESCC.
- Published
- 2016
42. Approach for Evaluating LID Measure Layout Scenarios Based on Random Forest: Case of Guangzhou—China
- Author
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Guoru Huang, Liao Xianghua, Jiaxuan Zheng, and Chengli Huang
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lcsh:Hydraulic engineering ,genetic structures ,Geography, Planning and Development ,0207 environmental engineering ,02 engineering and technology ,010501 environmental sciences ,Aquatic Science ,01 natural sciences ,Biochemistry ,lcsh:Water supply for domestic and industrial purposes ,optimal low impact development measure layout scenario ,lcsh:TC1-978 ,020701 environmental engineering ,China ,0105 earth and related environmental sciences ,Water Science and Technology ,Water discharge ,lcsh:TD201-500 ,Measure (data warehouse) ,business.industry ,sponge city ,Environmental resource management ,Random forest ,Environmental science ,Water quality ,Low-impact development ,business ,random forest ,Statistical classifier - Abstract
Currently, with the rapid development of many cities, water problems, such as water logging and water quality deterioration, occur inevitably. Thus, sponge city construction and low impact development (LID) utilization have become more important worldwide. However, previous works have failed to address the problem of selecting an optimal LID measure layout scenario by simultaneously considering various evaluation indices without subjective factors. In this study, we applied a new and outstanding statistical classifier, random forest, to aid in addressing this conundrum. It was tested on a case study in LiWan district, Guangzhou city. The following conclusions were drawn. (1) To some extent, LID measures are capable of reducing water discharge and generation of pollutants. (2) Excluding subjective factors, random forest can select an optimal LID measure layout scenario when simultaneously considering multiple indices. This study proposed a novel and effective means to evaluate the hydrologic effects of LID measures when constructing sponge cities and provided a guide for optimizing LID layouts.
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- 2018
- Full Text
- View/download PDF
43. Inter-rater Reliability of MyotonPRO for Assessing Muscle Mechanical Properties in Stroke Patients
- Author
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Yue Lan, Jin Zhang, Yuan Peng, Jiaxuan Zheng, Yujie Chen, and Shunxi Zhang
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medicine.medical_specialty ,Inter-rater reliability ,Physical medicine and rehabilitation ,Complementary and alternative medicine ,Stroke patient ,business.industry ,Pharmaceutical Science ,Medicine ,Pharmacology (medical) ,business - Published
- 2018
- Full Text
- View/download PDF
44. Electroacupuncture inhibits annulus fibrosis cell apoptosis in vivo via TNF-α-TNFR1-caspase-8 and integrin β1/Akt signaling pathways.
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Jun Liao, Le Zhang, Jiaxuan Zheng, Debiao Yu, Meigui Ke, and Teng Xu
- Published
- 2014
- Full Text
- View/download PDF
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