35 results on '"Xiao‐Wen Yu"'
Search Results
2. High-Temperature Oxidation of Magnesium- and Iron-Rich Olivine under a CO2 Atmosphere: Implications for Venus
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Shan-Shan Zhong, Yu-Yan Sara Zhao, Honglei Lin, Rui Chang, Chao Qi, Junhu Wang, Bing Mo, Yuanyun Wen, Wen Yu, Di-Sheng Zhou, Xiao-Wen Yu, Xiongyao Li, and Jianzhong Liu
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olivine ,oxidation rates ,Venus ,anomalous emissivity ,atmosphere surface interactions ,Science - Abstract
Understanding crust–atmosphere interactions on Venus is fundamentally important to interpretations of Venus’ surface spectroscopic data. Olivine, in basaltic crust, is oxidized under a heated CO2 atmosphere. However, the oxidation rates, product assemblages and spectral characteristics of olivine samples with different Fa# values remain largely unclear. Herein, we investigated the oxidation of olivine with different Fa# values (Fa09, Fa29 and Fa71) under CO2 atmosphere at 470 °C and 900 °C and characterized the oxidation products (both microscopically and macroscopically), conversion rates and VNIR spectra. The results showed that the oxidation of olivine produced magnesioferrite, magnetite, laihunite, hematite and maghemite at 470 °C and hematite, magnetite, magnesioferrite and amorphous SiO2 at 900 °C. Both high temperature and high Fa# values accelerated the oxidation rates. The production of oxide coatings on olivine grains (74 μm in size) was estimated to be completed within tens to hundreds of years at 470 °C in natural settings, with even shorter periods under higher temperatures. Thus, CO2 oxidation would quickly eliminate olivine spectral characteristics, and spectral parameters at 850 and 1020 nm, as well as other relevant spectral windows (considering shifts induced by the elevated temperature), could be used to trace olivine oxidation processes. This work presented a case study connecting microscopic features to spectral characteristics for Venus’ surface–atmosphere interactions. Further studies considering more realistic Venus’ surface–atmosphere conditions will be essential to better interpret the measured spectroscopic data and determine the origins of the high emissivity detected on elevated terrain on Venus.
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- 2023
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3. A role for CIM6P/IGF2 receptor in memory consolidation and enhancement
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Xiao-Wen Yu, Kiran Pandey, Aaron C Katzman, and Cristina M Alberini
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rat ,mouse ,igf-2 receptor ,cation independnet mannose 6 phosphate receptor ,memory ,learning ,Medicine ,Science ,Biology (General) ,QH301-705.5 - Abstract
Cation-independent mannose-6-phosphate receptor, also called insulin-like growth factor two receptor (CIM6P/IGF2R), plays important roles in growth and development, but is also extensively expressed in the mature nervous system, particularly in the hippocampus, where its functions are largely unknown. One of its major ligands, IGF2, is critical for long-term memory formation and strengthening. Using CIM6P/IGF2R inhibition in rats and neuron-specific knockdown in mice, here we show that hippocampal CIM6P/IGF2R is necessary for hippocampus-dependent memory consolidation, but dispensable for learning, memory retrieval, and reconsolidation. CIM6P/IGF2R controls the training-induced upregulation of de novo protein synthesis, including increase of Arc, Egr1, and c-Fos proteins, without affecting their mRNA induction. Hippocampal or systemic administration of mannose-6-phosphate, like IGF2, significantly enhances memory retention and persistence in a CIM6P/IGF2R-dependent manner. Thus, hippocampal CIM6P/IGF2R plays a critical role in memory consolidation by controlling the rate of training-regulated protein metabolism and is also a target mechanism for memory enhancement.
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- 2020
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4. CREB overexpression in dorsal CA1 ameliorates long-term memory deficits in aged rats
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Xiao-Wen Yu, Daniel M Curlik II, M Matthew Oh, Jerry CP Yin, and John F Disterhoft
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aging ,memory ,CREB ,cognition ,Medicine ,Science ,Biology (General) ,QH301-705.5 - Abstract
The molecular mechanisms underlying age-related cognitive deficits are not yet fully elucidated. In aged animals, a decrease in the intrinsic excitability of CA1 pyramidal neurons is believed to contribute to age-related cognitive impairments. Increasing activity of the transcription factor cAMP response element-binding protein (CREB) in young adult rodents facilitates cognition, and increases intrinsic excitability. However, it has yet to be tested if increasing CREB expression also ameliorates age-related behavioral and biophysical deficits. To test this hypothesis, we virally overexpressed CREB in CA1 of dorsal hippocampus. Rats received CREB or control virus, before undergoing water maze training. CREB overexpression in aged animals ameliorated the long-term memory deficits observed in control animals. Concurrently, cells overexpressing CREB in aged animals had reduced post-burst afterhyperpolarizations, indicative of increased intrinsic excitability. These results identify CREB modulation as a potential therapy to treat age-related cognitive decline.
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- 2017
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5. TOC1: A valuable tool in assessing disease progression in the rTg4510 mouse model of tauopathy
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Sarah M. Ward, Diana S. Himmelstein, Yan Ren, Yifan Fu, Xiao-Wen Yu, Kaleigh Roberts, Lester I. Binder, and Naruhiko Sahara
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Neurodegenerative diseases ,Tauopathies ,Oxidation ,Reduction ,Oligomer ,Filament ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
All tauopathies result in various forms of cognitive decline and neuronal loss. Although in some diseases, tau mutations appear to cause neurodegeneration, the toxic “form” of tau remains elusive. Tau is the major protein found within neurofibrillary tangles (NFTs) and therefore it seemed rational to assume that aggregation of tau monomers into NFTs was causal to the disease process. However, the appearance of oligomers rather than NFTs coincides much better with the voluminous neuronal loss in many of these diseases. In this study, we utilized the bigenic mouse line (rTg4510) which conditionally expresses P301L human tau. A novel tau antibody, termed Tau Oligomer Complex 1 (TOC1) was employed to probe mouse brains and assess disease progression. TOC1 selectively recognizes dimers/oligomers and appears to constitute an early stage marker of tau pathology. Its peak reactivity is coincident with other well-known early stage pathological markers such as MC1 and the early-stage phospho-marker CP13. TOC1's reactivity depends on the conformation of the tau species since it does not react with monomer under native conditions, although it does react with monomers under SDS-denaturation. This indicates a conformational change must occur within the tau aggregate to expose its epitope. Tau oligomers preferentially form under oxidizing conditions and within this mouse model, we observe tau oligomers forming at an increased rate and persisting much longer, most likely due to the aggressive P301L mutation. With the help of other novel antibodies, the use of this antibody will aid in providing a better understanding of tau toxicity within Alzheimer's disease and other tauopathies.
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- 2014
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6. Genital microbiota of reproductive-age women from six ethnic groups with and without human papillomavirus (HPV) infection in Shangri-La, China: population surveillance study
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Li, Xiao-Ran, primary, Wu, Xiao-Mei, additional, Liu, Chen-Jian, additional, XIao, Wen-yu, additional, Fang, Jun-Feng, additional, Dong, Yong-Hong, additional, Ye, Ke-Fan, additional, He, Meng-Ping, additional, Wang, Yan-Song, additional, Li, Xiao, additional, Zhao, Zhi-Min, additional, Yuan, Tao, additional, Zhao, Ting, additional, He, Chun-Yan, additional, Zhang, Shu-Ming, additional, and Yang, En, additional
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- 2024
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7. Rat tight junction proteins are disrupted after subchronic exposure to okadaic acid
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Lu Huang, Bo Liu, Xiao-Wen Yu, Guang-Qiang Pan, Jia-Yi Xu, Dong Yan, Ya-Li Wang, and Qiao-Nan Guo
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Health, Toxicology and Mutagenesis ,Environmental Chemistry ,General Medicine ,Pollution - Published
- 2023
8. Cryogenic Sulfuric Weathering and Challenges for Preserving Iron‐Rich Olivine on Cold and Icy Mars
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Xiao‐Wen Yu, Yu‐Yan Sara Zhao, Yanxue Wu, Chao Qi, Dongdong Li, Honglei Lin, Shiling Yang, Jianzhong Liu, and Xiongyao Li
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Geophysics ,Space and Planetary Science ,Geochemistry and Petrology ,Earth and Planetary Sciences (miscellaneous) - Published
- 2022
9. Effects of Formation Pathways and Bromide Incorporation on Jarosite Dissolution Rates: Implications for Mars
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Di‐Sheng Zhou, Xiao‐Wen Yu, Rui Chang, Yu‐Yan Sara Zhao, Xiongyao Li, Jianzhong Liu, Honglei Lin, and Chao Qi
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Geophysics ,Space and Planetary Science ,Geochemistry and Petrology ,Earth and Planetary Sciences (miscellaneous) - Published
- 2022
10. Genital Microbiota of Women From Six Ethnic Groups With and Without Human Papillomavirus Infection in Shangri-La, China
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Liu, Chen-Jian, primary, Xiao, Wen-Yu, additional, Fang, Jun-Feng, additional, Dong, Yong-Hong, additional, Ye, Ke-Fan, additional, He, Meng-Ping, additional, Wang, Yan-Song, additional, Li, Xiao, additional, Zhao, Zhi-Min, additional, Yuan, Tao, additional, Zhao, Ting, additional, He, Chun-Yan, additional, Zhang, Shu-Ming, additional, Yang, En, additional, Wu, Xiao-Mei, additional, and Li, Xiao-Ran, additional
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- 2022
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11. Genital Microbiota of Reproductive-Age Women From Six Ethnic Groups With and Without Human Papillomavirus (HPV) Infection in Shangri-La, China
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Liu, Chen-Jian, primary, Xiao, Wen-Yu, additional, Fang, Jun-Feng, additional, Dong, Yong-Hong, additional, Ye, Ke-Fan, additional, He, Meng-Ping, additional, Wang, Yan-Song, additional, Li, Xiao, additional, Zhao, Zhi-Min, additional, Yuan, Tao, additional, Zhao, Ting, additional, He, Chun-Yan, additional, Zhang, Shu-Ming, additional, Yang, En, additional, Wu, Xiao-Mei, additional, and Li, Xiao-Ran, additional
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- 2022
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12. Autophagy coupled to translation is required for long-term memory
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Xiao Wen Yu, Cristina M. Alberini, Kiran Pandey, and Adam B. Steinmetz
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0301 basic medicine ,Male ,Memory, Long-Term ,Fluorescent Antibody Technique ,Biology ,Hippocampus ,03 medical and health sciences ,Sequestosome-1 Protein ,Protein biosynthesis ,Autophagy ,Avoidance Learning ,Animals ,Learning ,Rats, Long-Evans ,Molecular Biology ,030102 biochemistry & molecular biology ,Long-term memory ,Mechanism (biology) ,Arc arg3 1 ,Lysosome-Associated Membrane Glycoproteins ,Translation (biology) ,Cell Biology ,Cell biology ,Rats ,030104 developmental biology ,Gene Knockdown Techniques ,Protein Biosynthesis ,Beclin-1 ,Microtubule-Associated Proteins ,Homeostasis ,Research Paper - Abstract
An increase in protein synthesis following learning is a fundamental and evolutionarily conserved mechanism of long-term memory. To maintain homeostasis, this protein synthesis must be counterbalanced by mechanisms such as protein degradation. Recent studies reported that macroautophagy/autophagy, a major protein degradation mechanism, is required for long-term memory formation. However, how learning regulates autophagy and recruits it into long-term memory formation remains to be established. Here, we show that inhibitory avoidance in rats significantly increases the levels of autophagy and lysosomal degradation proteins, including BECN1/beclin 1, LC3-II, SQSTM1/p62 and LAMP1, as well as autophagic flux in the hippocampus. Moreover, pharmacological inhibition or targeted molecular disruption of the learning-induced autophagy impairs long-term memory, leaving short-term memory intact. The increase in autophagy proteins results from active translation of their mRNA and not from changes in their total mRNA levels. Additionally, the induction of autophagy requires the immediate early gene Arc/Arg3.1. Finally, in contrast to classical regulation of autophagy in other systems, we found that the increase in autophagy upon learning is dispensable for the increase in protein synthesis. We conclude that coupling between learning-induced translation and autophagy, rather than translation per se, is an essential mechanism of long-term memory. Abbreviations: AAV: adeno-associated virus; ARC/ARG3.1: activity regulated cytoskeletal-associated protein; ATG: autophagy related; DG: dentate gyrus; GFP: green fluorescent protein; IA: inhibitory avoidance; LAMP1: lysosomal-associated membrane protein 1; MAP1LC3B/LC3B: microtubule-associated protein 1 light chain 3 beta; ODN: oligodeoxynucleotide; qPCR: quantitative polymerase chain reaction; SBI: SBI0206965; SQSTM1/p62: sequestosome 1; SUnSET: surface sensing of translation; TRAP: translating ribosome affinity purification; ULK1: unc-51 like kinase 1
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- 2020
13. A role for CIM6P/IGF2 receptor in memory consolidation and enhancement
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Cristina M. Alberini, Xiao Wen Yu, Aaron Katzman, and Kiran Pandey
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0301 basic medicine ,Male ,Memory, Long-Term ,QH301-705.5 ,Science ,medicine.medical_treatment ,Hippocampus ,Hippocampal formation ,General Biochemistry, Genetics and Molecular Biology ,Receptor, IGF Type 2 ,memory ,03 medical and health sciences ,Mice ,0302 clinical medicine ,Downregulation and upregulation ,medicine ,Animals ,rat ,Rats, Long-Evans ,Biology (General) ,Receptor ,mouse ,Memory Consolidation ,Neurons ,Arc (protein) ,learning ,General Immunology and Microbiology ,Chemistry ,General Neuroscience ,Growth factor ,Insulin-like growth factor 2 receptor ,igf-2 receptor ,General Medicine ,Cell biology ,Rats ,030104 developmental biology ,Mental Recall ,Medicine ,Memory consolidation ,Female ,Open Field Test ,030217 neurology & neurosurgery ,cation independnet mannose 6 phosphate receptor ,Research Article ,Neuroscience - Abstract
Cation-independent mannose-6-phosphate receptor, also called insulin-like growth factor two receptor (CIM6P/IGF2R), plays important roles in growth and development, but is also extensively expressed in the mature nervous system, particularly in the hippocampus, where its functions are largely unknown. One of its major ligands, IGF2, is critical for long-term memory formation and strengthening. Using CIM6P/IGF2R inhibition in rats and neuron-specific knockdown in mice, here we show that hippocampal CIM6P/IGF2R is necessary for hippocampus-dependent memory consolidation, but dispensable for learning, memory retrieval, and reconsolidation. CIM6P/IGF2R controls the training-induced upregulation of de novo protein synthesis, including increase of Arc, Egr1, and c-Fos proteins, without affecting their mRNA induction. Hippocampal or systemic administration of mannose-6-phosphate, like IGF2, significantly enhances memory retention and persistence in a CIM6P/IGF2R-dependent manner. Thus, hippocampal CIM6P/IGF2R plays a critical role in memory consolidation by controlling the rate of training-regulated protein metabolism and is also a target mechanism for memory enhancement.
- Published
- 2020
14. Author response: A role for CIM6P/IGF2 receptor in memory consolidation and enhancement
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Cristina M. Alberini, Xiao Wen Yu, Kiran Pandey, and Aaron Katzman
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Memory consolidation ,Psychology ,Receptor ,Neuroscience - Published
- 2020
15. Prognostic role of the pre-treatment platelet-lymphocyte ratio in pancreatic cancer: a meta-analysis
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Wen-Ji Xu, Yong-Peng Ou-Yang, Wen-Long Wang, Yin Zhang, Zhi-Qiang Luo, Zheng-Shui Xu, Xiao-Wen Yu, and Fa-Peng Zhang
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Oncology ,Pre treatment ,medicine.medical_specialty ,overall survival ,pancreatic cancer ,PLR ,03 medical and health sciences ,0302 clinical medicine ,Internal medicine ,Pancreatic cancer ,medicine ,Overall survival ,Platelet lymphocyte ratio ,business.industry ,Hazard ratio ,Retrospective cohort study ,medicine.disease ,Confidence interval ,Surgery ,body regions ,030220 oncology & carcinogenesis ,Meta-analysis ,030211 gastroenterology & hepatology ,business ,Meta-Analysis - Abstract
// Zheng-Shui Xu 1, * , Fa-Peng Zhang 2, * , Yin Zhang 3 , Yong-Peng Ou-Yang 3 , Xiao-Wen Yu 3 , Wen-Long Wang 3 , Wen-Ji Xu 3 and Zhi-Qiang Luo 3 1 Department of General Surgery, GuangRen Hospital of Xi’an Jiaotong University, 710000, Xi’an, Shaanxi, China 2 Department of General Surgery, The Second Affiliated Hospital of Sun Yat-Sen University, 510120, Guangzhou, Guangdong, China 3 Department of General Surgery, The Second Affiliated Hospital of Nanchang University, 330006, Nanchang, Jiangxi, China * These authors contributed equally to this study and share first authorship Correspondence to: Zhi-Qiang Luo, email: Zqluo999@163.com Wen-Ji Xu, email: 972903941@qq.com Keywords: PLR, pancreatic cancer, overall survival, meta-analysis Received: December 20, 2016 Accepted: September 03, 2017 Published: September 14, 2017 ABSTRACT Background and Aims: Recently, the pre-treatment platelet-lymphocyte ratio (PLR), which is based on blood parameters, was accepted as a prognostic factor for patients with various cancers. Numerous studies have investigated the prognostic role of the PLR in pancreatic cancer; however, it remains unclear. Therefore, we conducted this meta-analysis to evaluate the relationship between the pre-treatment PLR and overall survival (OS) in pancreatic cancer. Materials and Methods: We performed a systematic literature search of the PubMed, Embase and Web of Science databases for relevant studies that explored the prognostic role of the pre-treatment PLR in pancreatic cancer. The hazard ratios (HRs) and 95% confidence intervals (CIs) related to OS were pooled using a random effects model. Results: Fourteen retrospective cohort studies involving 2,260 patients were included in this meta-analysis. Compared with low PLR, high PLR was a predictor of shorter OS (HR = 1.24, 95% CI: 1.10–1.39, I 2 = 74%). Conclusions: In this meta-analysis, high pre-treatment PLR was a bio-predictor of short OS in patients with pancreatic cancer, suggesting that PLR could be used to predict prognosis of patients with pancreatic cancer before treatment. However, additional well-designed and large-scale studies are necessary.
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- 2017
16. CREB, cellular excitability, and cognition: Implications for aging
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John F. Disterhoft, M. Matthew Oh, and Xiao-Wen Yu
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Neurons ,0301 basic medicine ,Aging ,biology ,Regulator ,Hippocampus ,Long-term potentiation ,Cognition ,CREB ,Molecular cellular cognition ,Article ,03 medical and health sciences ,Behavioral Neuroscience ,030104 developmental biology ,0302 clinical medicine ,CREB in cognition ,biology.protein ,Animals ,Humans ,Cyclic AMP Response Element-Binding Protein ,Psychology ,Neuroscience ,Neuronal memory allocation ,030217 neurology & neurosurgery - Abstract
Humans and laboratory animals display cognitive deficits as they age. However, there are currently no effective therapies available to treat these deficits, as the underlying mechanisms are poorly understood. Studies using pharmacological compounds have found a link between cognitive performance and the intrinsic cellular excitability of CA1 hippocampal neurons. Therefore, it is of great interest to identify molecular regulators that may be influencing both cognition and neuronal excitability, which could be changed with age. One possible regulator is the transcription factor cAMP response element binding-protein (CREB). In young adult animals, manipulation of CREB activity has resulted in modulation of both cognitive performance on behavioral tasks, and neuronal excitability. While evidence is sparse, studies also point to a dysfunction in CREB signaling with aging. We propose that CREB may be a viable therapeutic target for the treatment of age-related cognitive deficits, along with potential experiments to test this hypothesis.
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- 2017
17. Nrf2 deficiency exacerbates frailty and sarcopenia by impairing skeletal muscle mitochondrial biogenesis and dynamics in an age-dependent manner
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Huang, Dong-Dong, primary, Fan, Sheng-Dong, additional, Chen, Xi-Yi, additional, Yan, Xia-Lin, additional, Zhang, Xian-Zhong, additional, Ma, Bing-Wei, additional, Yu, Ding-Ye, additional, Xiao, Wen-Yu, additional, Zhuang, Cheng-Le, additional, and Yu, Zhen, additional
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- 2019
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18. Neuroprotective astrocyte-derived insulin/insulin-like growth factor 1 stimulates endocytic processing and extracellular release of neuron-bound Aβ oligomers
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Fernanda G. De Felice, Kirsten L. Viola, Nadia DiNunno, Flávia Carvalho Alcantara Gomes, Vanessa Tortelli, William L. Klein, Maira S. Oliveira, Sathwik Nandamuri, Xiao-Wen Yu, Luan Pereira Diniz, Sergio T. Ferreira, Jason Pitt, Kyle C. Wilcox, and Cassandra Dobbins
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0301 basic medicine ,medicine.medical_treatment ,Endocytic cycle ,Biology ,Neuroprotection ,03 medical and health sciences ,Insulin-like growth factor ,0302 clinical medicine ,Alzheimer Disease ,medicine ,Extracellular ,Animals ,Humans ,Insulin ,Insulin-Like Growth Factor I ,Molecular Biology ,Cells, Cultured ,Neurons ,Amyloid beta-Peptides ,Aβ oligomers ,Brain ,Cell Biology ,Articles ,Cell biology ,Rats ,030104 developmental biology ,medicine.anatomical_structure ,Neuroprotective Agents ,Biochemistry ,nervous system ,Cell Biology of Disease ,Astrocytes ,Synapses ,Central Nervous System Stimulants ,Neuron ,030217 neurology & neurosurgery ,Astrocyte - Abstract
Findings reveal a novel basis for protecting CNS neurons against Aβ oligomers (AβOs), neurotoxins believed to instigate neural damage leading to Alzheimer’s dementia. Results with spatially separated cocultures of astrocytes and hippocampal neurons show an exosome-like mechanism by which insulin/IGF1 from astrocytes clear bound AβOs from neuronal surfaces., Synaptopathy underlying memory deficits in Alzheimer’s disease (AD) is increasingly thought to be instigated by toxic oligomers of the amyloid beta peptide (AβOs). Given the long latency and incomplete penetrance of AD dementia with respect to Aβ pathology, we hypothesized that factors present in the CNS may physiologically protect neurons from the deleterious impact of AβOs. Here we employed physically separated neuron–astrocyte cocultures to investigate potential non–cell autonomous neuroprotective factors influencing AβO toxicity. Neurons cultivated in the absence of an astrocyte feeder layer showed abundant AβO binding to dendritic processes and associated synapse deterioration. In contrast, neurons in the presence of astrocytes showed markedly reduced AβO binding and synaptopathy. Results identified the protective factors released by astrocytes as insulin and insulin-like growth factor-1 (IGF1). The protective mechanism involved release of newly bound AβOs into the extracellular medium dependent upon trafficking that was sensitive to exosome pathway inhibitors. Delaying insulin treatment led to AβO binding that was no longer releasable. The neuroprotective potential of astrocytes was itself sensitive to chronic AβO exposure, which reduced insulin/IGF1 expression. Our findings support the idea that physiological protection against synaptotoxic AβOs can be mediated by astrocyte-derived insulin/IGF1, but that this protection itself is vulnerable to AβO buildup.
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- 2017
19. CREB overexpression in dorsal CA1 ameliorates long-term memory deficits in aged rats
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M. Matthew Oh, Xiao-Wen Yu, Daniel M. Curlik, Jerry C.P. Yin, and John F. Disterhoft
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0301 basic medicine ,cognition ,Memory, Long-Term ,QH301-705.5 ,Science ,Gene Expression ,Water maze ,CREB ,General Biochemistry, Genetics and Molecular Biology ,memory ,03 medical and health sciences ,0302 clinical medicine ,CREB in cognition ,Gene expression ,Cyclic AMP Response Element-Binding Protein ,Animals ,Medicine ,Cognitive decline ,Biology (General) ,CA1 Region, Hippocampal ,Transcription factor ,General Immunology and Microbiology ,biology ,business.industry ,Long-term memory ,General Neuroscience ,aging ,General Medicine ,Rats ,030104 developmental biology ,biology.protein ,Rat ,business ,Neuroscience ,030217 neurology & neurosurgery ,Research Article - Abstract
The molecular mechanisms underlying age-related cognitive deficits are not yet fully elucidated. In aged animals, a decrease in the intrinsic excitability of CA1 pyramidal neurons is believed to contribute to age-related cognitive impairments. Increasing activity of the transcription factor cAMP response element-binding protein (CREB) in young adult rodents facilitates cognition, and increases intrinsic excitability. However, it has yet to be tested if increasing CREB expression also ameliorates age-related behavioral and biophysical deficits. To test this hypothesis, we virally overexpressed CREB in CA1 of dorsal hippocampus. Rats received CREB or control virus, before undergoing water maze training. CREB overexpression in aged animals ameliorated the long-term memory deficits observed in control animals. Concurrently, cells overexpressing CREB in aged animals had reduced post-burst afterhyperpolarizations, indicative of increased intrinsic excitability. These results identify CREB modulation as a potential therapy to treat age-related cognitive decline. DOI: http://dx.doi.org/10.7554/eLife.19358.001
- Published
- 2017
20. Author response: CREB overexpression in dorsal CA1 ameliorates long-term memory deficits in aged rats
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John F. Disterhoft, Daniel M. Curlik, Xiao-Wen Yu, Jerry Cp Yin, and M. Matthew Oh
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Dorsum ,biology ,business.industry ,Long-term memory ,biology.protein ,Medicine ,business ,CREB ,Neuroscience - Published
- 2016
21. Genetic polymorphism of clopidogrel metabolism related gene CYP2C19 gene in Chinese from Foshan area of Guangdong Province
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Xiao-wen Yuan, Shi-yun Yuan, Guo-xin Wu, zhi-xin Wu, and Zi-yun Guan
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Polymorphism ,genetic ,pharmacogenetics ,CYP2C19 ,China ,Diseases of the blood and blood-forming organs ,RC633-647.5 - Abstract
Background: The CYP2C19 gene is highly polymorphic, and CYP2C19 is involved in the broad interindividual variability of the clinical efficacy of certain clinical medications, such as clopidogrel. However, data on the CYP2C19 genotype in the Chinese population of the Foshan area of Guangdong Province are scarce. The purpose of this study was to determine CYP2C19 genetic polymorphisms in patients in the Foshan area and to compare the CYP2C19 genotype frequencies in different populations to determine the allele distribution pattern to identify the most appropriate prescription.Methods: The CYP2C19 gene was detected in 1231 patients on a gene chip platform, and the genotype frequencies of CYP2C19 in Foshan populations from different populations were compared.Results: The frequencies of CYP2C19*1, *2 and *3 in the Foshan population were 63.89%, 30.46% and 5.65%, respectively. For the three metabolic types, the frequency associated with the rapid metabolism type (*1/*1) was 41.51 [95% confidence interval (CI) 40.11 to 42.91%]; that for the intermediate metabolism type (*1/*2, *1/*3) was 44.76% (95% CI 43.34 to 46.18) and that for the slow metabolism type (*2/*2, *2/*3, *3/*3) was 13.73% (95% CI 12.75 to 14.71%). In the Foshan population, the frequencies of the CYP2C19 *2 and *3 alleles were similar to those previously reported for Chinese and other Asian populations.Conclusion: Our study is a report on the genetic basis of CYP2C19 polymorphism in the Foshan population. Our results will potentially contribute to the improvement of pharmacotherapy effectiveness by providing personalized medicine for the Foshan population.
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- 2022
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22. Price–volume cross-correlation analysis of CSI300 index futures
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Yuan-Yuan Suo, Dong-Hua Wang, Xiao-Wen Yu, and Man Lei
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Statistics and Probability ,Index (economics) ,Econophysics ,Series (mathematics) ,Cross correlation analysis ,Econometrics ,Statistical and Nonlinear Physics ,Multifractal system ,Futures contract ,Statistic ,Volume (compression) ,Mathematics - Abstract
We investigate the cross-correlation between price returns and trading volumes for the China Securities Index 300 (CSI300) index futures, which are the only stock index futures traded on the China Financial Futures Exchange (CFFEX). The basic statistics suggest that distributions of these two time series are not normal but exhibit fat tails. Based on the detrended cross-correlation analysis (DCCA), we obtain that returns and trading volumes are long-range cross-correlated. The existence of multifractality in the cross-correlation between returns and trading volumes has been proven with the multifractal detrended cross-correlation analysis (MFDCCA) algorithm. The multifractal analysis also confirms that returns and trading volumes have different degrees of multifractality. We further perform a cross-correlation statistic to verify whether the cross-correlation significantly exists between returns and trading volumes for CSI300 index futures. In addition, results of the test for lead-lag effect demonstrate that contemporaneous cross-correlation of return and trading volume series is stronger than cross-correlations of leaded or lagged series.
- Published
- 2013
23. Statistical properties of the yuan exchange rate index
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Dong-Hua Wang, Xiao-Wen Yu, and Yuan-Yuan Suo
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Statistics and Probability ,Exchange rate ,Effective exchange rate ,Index (economics) ,Series (mathematics) ,Econophysics ,Moving average ,Statistics ,Statistical and Nonlinear Physics ,Multifractal system ,Exchange-rate regime ,Mathematics - Abstract
We choice the yuan exchange rate index based on a basket of currencies as the effective exchange rate of the yuan and investigate the statistical properties of the yuan exchange rate index after China’s exchange rate system reform on the 21st July 2005. After dividing the time series into two parts according to the change in the yuan exchange rate regime in July 2008, we compare the statistical properties of the yuan exchange rate index during these two periods. We find that the distribution of the two return series has the exponential form. We also perform the detrending moving average analysis (DMA) and the multifractal detrending moving average analysis (MFDMA). The two periods possess different degrees of long-range correlations, and the multifractal nature is also unveiled in these two time series. Significant difference is found in the scaling exponents τ ( q ) and singularity spectra f ( α ) of the two periods obtained from the MFDMA analysis. Besides, in order to detect the sources of multifractality, shuffling and phase randomization procedures are applied to destroy the long-range temporal correlation and fat-tailed distribution of the yuan exchange rate index respectively. We find that the fat-tailedness plays a critical role in the sources of multifractality in the first period, while the long memory is the major cause in the second period. The results suggest that the change in China’s exchange rate regime in July 2008 gives rise to the different multifractal properties of the yuan exchange rate index in these two periods, and thus has an effect on the effective exchange rate of the yuan after the exchange rate reform on the 21st July 2005.
- Published
- 2012
24. P2‐043: Total and activated creb protein levels differentially change in hippocampal sub‐regions with age and correlate with behavioral performance
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Xiao-Wen Yu, Matthew M. Oh, Daniel M. Curlik, John F. Disterhoft, and Jerry C.P. Yin
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medicine.medical_specialty ,biology ,Epidemiology ,Health Policy ,Hippocampal formation ,CREB ,Sub region ,Psychiatry and Mental health ,Cellular and Molecular Neuroscience ,Endocrinology ,Developmental Neuroscience ,Internal medicine ,biology.protein ,medicine ,Neurology (clinical) ,Geriatrics and Gerontology ,Neuroscience - Published
- 2015
25. Intraneobladder Hem-o-Lok Migration with Stone Formation after Orthotopic Neobladder Cystectomy
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Shu-xiong, Zeng, Zhen-sheng, Zhang, Xiao-wen, Yu, Hui-zhen, Li, Xin, Lu, Ying-hao, Sun, and Chuan-liang, Xu
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Article Subject ,education - Abstract
Introduction. Laparoscopic and robot-assisted laparoscopic surgery are widely performed in urology field, so Hem-o-Lok clips are thus extensively used in the laparoscopic procedures. We describe the first case of Hem-o-Lok clip which migrated into the neobladder with calculus formation 26 months after laparoscopic orthotopic neobladder cystectomy, which causes symptoms of gross hematuria and frequent urination. Case Presentation. A 57-year-old man with T2a muscle invasive bladder cancer underwent laparoscopic orthotopic sigmoid neobladder reconstruction after cystectomy which was complicated by intestinal anastomosis leak and peritoneal abscess requiring transverse colostomy and drainage 15 days postoperatively. Twenty-six months after cystectomy, he complained of gross hematuria and frequent urination. Computerized tomography and plain pelvic X-ray revealed a stone measuring approximately 2.8 cm in diameter in the neobladder. During cystoscopy, a closed whitish Hem-o-Lok clip was seen in the center of the calculi. No anastomotic leak or neoplasm was found during cystoscopy. Conclusion. Hem-o-Lok clip migration into the bladder after laparoscopic orthotopic neobladder cystectomy is a rare complication; the first reported case in the literature. To prevent Hem-o-Lok clip migration, it is recommended to avoid extensive use of Hem-o-Lok clip close to anastomosis site, and any loose Hem-o-Lok clip should be retrieved before closure.
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- 2014
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26. Analysis on Sustainable Development Management Model of Village Banks — Based on Bayan Rongxing Village Bank in Heilongjiang Province
- Author
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Shuang, Wang, primary, Ji-heng, Wang, additional, Bing, Liu, additional, and Xiao-wen, Yu, additional
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- 2015
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27. Use of hospital appointment registration systems in China: a survey study
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Xiao-wen Yu, Zi Liu, Hao Hu, Guimin Duan, Weiping Yu, and Yitao Wang
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Adult ,Male ,medicine.medical_specialty ,China ,media_common.quotation_subject ,education ,MEDLINE ,WAS: web-based appointment system ,Health administration ,CAS: clinical appointment system ,Appointments and Schedules ,Promotion (rank) ,Sex Factors ,114: 114 telephone appointment system ,Hospital Administration ,Residence Characteristics ,Health card ,Medicine ,Humans ,BST: bank self-service terminal appointment system ,Personal knowledge base ,hospital ,health care economics and organizations ,media_common ,Aged ,business.industry ,appointment registration system ,Age Factors ,Survey research ,Patient Preference ,General Medicine ,Articles ,Middle Aged ,humanities ,OAS: the on-site appointment system ,Socioeconomic Factors ,Family medicine ,Residence ,Female ,95533: telephone appointment system based on China Construction Bank's customer call center ,patient ,business - Abstract
Background: Hospitals have expressed no knowledge of patients’ opinions regarding diversified appointment registration systems, despite efforts to develop novel appointment registration systems that assist patients and increase hospital efficiency. Therefore, the aim of this study was to investigate the use of diversified appointment registration systems and explore the factors influencing patients’ registration system choices. Methods: A survey study using a questionnaire was conducted in West China Hospital in February 2012. Outpatients were randomly selected from different hospital departments and the questionnaire was distributed and collected on-site. Results: Data from 1,009 patients were available for analysis. Of these, 63.4% used appointment systems to register while others chose a traditional queuing method to register. 114 telephone (30.4%) and on-site (22.9%) appointments were made, whereas other systems were less used by patients. Between the non-appointment and appointment groups there were significant differences in gender, educational degree, and residence location (P < 0.05), but no significant difference in age (P > 0.05). While the clinical appointment system had the greatest number of appointment days (25.75), the bank's self-service terminal appointment had the least number of appointment days (5.05). Leaflets sent from the hospital (50.70%) and the recommendations of friends or families (40.77%) were the two main ways of knowing about the appointment registration systems. With the exception of those who felt no need to make an appointment (30.12%), not having the capability to use the appointment systems (24.10%) and the lack of a registered health card (34.53%) were the two main reasons for not using appointment registration systems. Conclusions: Convenience was a major motivation for patients’ use of appointment registration systems. Personal knowledge and capability were the two important factors that influenced patients’ appointment system choices. Hospitals must improve the design and promotion of appointment registration systems to better facilitate their use.
- Published
- 2013
28. Sphere formation reverses the metastatic and cancer stem cell phenotype of the murine mammary tumour 4T1, independently of the putative cancer stem cell marker Sca-1
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Melanie J. McConnell, Michael V. Berridge, Xiao-Wen Yu, Ching-Wen Tang, and Heli Matilainen
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Cancer Research ,Pathology ,medicine.medical_specialty ,Population ,Blotting, Western ,Biology ,Metastasis ,Flow cytometry ,Mice ,Cancer stem cell ,In vivo ,Cell Line, Tumor ,medicine ,Biomarkers, Tumor ,Animals ,Antigens, Ly ,education ,education.field_of_study ,Mice, Inbred BALB C ,medicine.diagnostic_test ,Reverse Transcriptase Polymerase Chain Reaction ,Mammary Neoplasms, Experimental ,Membrane Proteins ,Cell Differentiation ,medicine.disease ,Flow Cytometry ,Haematopoiesis ,Cell Transformation, Neoplastic ,Phenotype ,Oncology ,Cell culture ,Cancer research ,Neoplastic Stem Cells ,Female ,Stem cell - Abstract
Breast cancer stem cells (BCSCs) initiate and sustain breast cancers, and several putative markers have been proposed to prospectively isolate BCSC from the non-cancer stem cell population. The candidate BCSC marker Sca-1 is a GPI-linked membrane protein expressed on activated lymphocytes, hematopoietic stem cells and mammary stem cells. Sca-1+ cells were purified from the murine mammary tumour cell line 4T1. However, this did not enrich for a stem-like, tumour initiating or metastatic cell population in vitro or in vivo. Sphere formation, which induced high levels of Sca-1, reduced BCSC gene expression with near complete loss of spontaneous metastasis from sphere-derived tumours. This was associated with decreased expression of TGFB2 and reduced activation of the TGFβ signalling pathway in spheres. Both TGFB2 expression in vitro and spontaneous metastasis in vivo could be restored upon re-differentiation of sphere cells by exposure to serum, and this occurred with retention of the majority of Sca-1 expression. We conclude that while putative BCSC, including spheres, can have high Sca-1 expression, Sca-1 itself is not a marker of BCSC in established 4T1 tumours or the cell line.
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- 2012
29. Technology Road Mapping for Innovation Pathways of Fibrates: A Cross-Database Patent Review
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Xiuping Chen, Xiao-wen Yu, Hao Hu, Yitao Wang, and Yuanjia Hu
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Trademark ,Knowledge management ,business.industry ,Cross-database, Evolution pathway, Fibrates, Patent review, Technology roadmap ,Road mapping ,Pharmaceutical Science ,Pharmacology (medical) ,Nanotechnology ,Technology roadmap ,European patent office ,Intellectual property ,Technology development ,business - Abstract
Purpose: To examine international technology development of fibrates based on a cross-database quantitative patent review and to describe the evolution pathway for fibrates by means of a technology roadmap. Methods: The patent data were collected in March 2013 from United States Patent and Trademark Office (USPTO), European Patent Office (EPO) and China Intellectual Property Right Net (CNIPR) to broadly represent global patent activities. Results: This study selected and examined 84 patents from USPTO, 41 patents from EPO and 39 patents from CNIPR. It showed that most of the fibrate patents were fenofibrate patents (41.67 % at USPTO, 46.34 % at EPO and 33.33 % at CNIPR). The number of preparation patents (44 at USPTO, 24 at EPO and 17 at CNIPR) and combination patents (23 at USPTO, 11 at EPO and 15 at CNIPR) was obviously larger than other types of fibrate patents. The technology roadmap shows that new monomersor derivatives of fibrates can drive fibrate evolution into a new cycle of application-synthesiscombination- preparation. Conclusion: This study provides a comprehensive picture of fibrate development. It will aid researchers, entrepreneurs, investors and policymakers to identify foci for fibrate research and ensure better decision-making.
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- 2015
30. Progress in promoting mechanism of tunneling nanotubes formation
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Xiao-wen Yu, Xiaoqing Wang, Yang-tai Guan, and Ming-yuan Liu
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Materials science ,Chemical physics ,General Medicine ,Mechanism (sociology) ,Quantum tunnelling - Published
- 2015
31. [Comparison of long bone repair in tibia by vascularized fibular grafting of different sides]
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Qian-Lai, Cao, Zhen, Wang, Xiao-Wen, Yu, Yong, Teng, Qing-Jun, Zhang, and Jing-Yu, Cai
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Male ,Tibial Fractures ,Adolescent ,Tibia ,Fibula ,Humans ,Bone Neoplasms ,Female ,Middle Aged ,Plastic Surgery Procedures ,Child ,Surgical Flaps ,Follow-Up Studies - Abstract
To evaluate the clinical effect of repair of massive bone defect in tibia by vascularized fibula grafting of either sides.Twenty-four cases of massive bone defect in tibia, among which 14 case were repaired by vascularized fibula grafting of the other side and another 10 cases were repaired by those of the same side, from 1987 to 1997 were followed up for 3 to 13 years; the functions of the operated limbs were evaluated according to Enneking Score System, and the outcome of the fibula grafts were assessed by radiographic examination with reference to the standard established by International Symposium on Limb Salvage.The average recover rate of the operated limbs in those repaired by the other side grafting was 80.7%, and the average healing period of the fibula graft was 14 weeks with fracture of the graft in one case which made the operated lower limb shorten for about 2.5 cm; the fibula grafts were observed thickened in 43 weeks, on average, and the patients could walk independently without a crutch. While in those repaired by the same side grafting, the average recover rate of the operated limbs was 68.3%, the average healing period of the fibula graft was 17 weeks with fracture of the graft in 3 cases, in 2 of which the lower limbs were shortened for 2 cm and 4 cm respectively, and in the third one infection occurred and amputation was performed finally; the fibula grafts were observed thickened in 49 weeks, on average, which made it available for the patients to walk without a crutch. All of the data showed that there was a significant difference statistically between the differently treated cases.It's a good choice to repair massive bone defect in tibia by vascularized fibula grafting, and the vascularized fibula graft from the other side could promote the bone healing and accelerate the recover of the function of the operated lower limb.
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- 2002
32. Prevalence and genotype distribution of human papillomavirus among 9945 women from the Nanhai area of Foshan
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Xiao-wen Yuan, Yi-Jian Li, Quan Qiu, Zi-yuan Luo, and Xue-feng Zhao
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Human papillomavirus ,Genotype ,Cervical carcinoma ,Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Background To provide a scientific basis for the prevention and treatment of cervical cancer (CC), we investigated the distribution characteristics and genotypes of human papillomavirus (HPV) and the prevalence of multiple HPV infections in women of different ages seeking management for abnormal cytology in Foshan City. Methods Screening for the 21 genotypes of HPV was carried out in 9945 females seeking management of abnormal cervical cytology results using rapid flow-through hybridization of nucleic acid molecules. The overall prevalence, genotype distribution and age-specific prevalence were examined. Results Our results indicate that the prevalence of overall, high-risk, intermediate-risk, and low-risk HPV infections was 13.5%, 12.1%, 1.3%, and 1.9%, respectively. Of the 1346 women who tested positive, 89.5% were positive for a single HPV genotype, and 10.5% were positive for ≥2 genotypes. The most frequently detected HPV genotype was HPV-16 (2.9%), followed by HPV-52 (2.9%), HPV-58 (1.5%), and HPV-CP8304 (1.0%). The highest infection prevalence was found in patients 21–30 years old (271/1670, 16.2%). Conclusion The prevalence of HPV infection in women seeking management for abnormal cytology in Foshan City is highest in the younger population (21–30 years old). Similar to most previous surveys, HPV-58 and HPV-52 infections are as common as HPV-16 infection.
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- 2019
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33. Technology Road Mapping for Innovation Pathways of Fibrates: A Cross-Database Patent Review.
- Author
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Xiao-Wen Yu, Hao Hu, Xiu-Ping Chen, Yuanjia Hu, and Yi-Tao Wang
- Subjects
- *
FEDERATED searching , *FIBRATES , *INTELLECTUAL property , *DECISION making - Abstract
Purpose: To examine international technology development of fibrates based on a cross-database quantitative patent review and to describe the evolution pathway for fibrates by means of a technology roadmap. Methods: The patent data were collected in March 2013 from United States Patent and Trademark Office (USPTO), European Patent Office (EPO) and China Intellectual Property Right Net (CNIPR) to broadly represent global patent activities. Results: This study selected and examined 84 patents from USPTO, 41 patents from EPO and 39 patents from CNIPR. It showed that most of the fibrate patents were fenofibrate patents (41.67 % at USPTO, 46.34 % at EPO and 33.33 % at CNIPR). The number of preparation patents (44 at USPTO, 24 at EPO and 17 at CNIPR) and combination patents (23 at USPTO, 11 at EPO and 15 at CNIPR) was obviously larger than other types of fibrate patents. The technology roadmap shows that new monomersor derivatives of fibrates can drive fibrate evolution into a new cycle of application-synthesiscombination-preparation. Conclusion: This study provides a comprehensive picture of fibrate development. It will aid researchers, entrepreneurs, investors and policymakers to identify foci for fibrate research and ensure better decision-making. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
34. Dataset for Jarosite dissolution rates and calculated particle lifetimes
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Di-Sheng Zhou, Di-Sheng Zhou, primary, Xiao-Wen Yu, Xiao-Wen Yu, additional, Rui Chang, Rui Chang, additional, Yu-Yan Sara Zhao, Yu-Yan Sara Zhao, additional, Xiong-Yao Li, Xiong-Yao Li, additional, Jian-Zhong Liu, Jian-Zhong Liu, additional, Hong-Lei Lin, Hong-Lei Lin, additional, and Chao Qi, Chao Qi, additional
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35. Catalpol attenuates EMT by inhibiting Wnt/β-catenin and TGF-β/Smads signaling to alleviate kidney fibrosis.
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Hong-yan Gao, Tao-ren Ruan, Mao Xing, Yi Chen, Shu-tong Bai, Jin-kun Liu, Xiao-wen Yu, Jing Feng, Xiao-yu Xu, and Qin Wang
- Subjects
- *
RENAL fibrosis , *WNT signal transduction , *EPITHELIAL-mesenchymal transition , *CHRONIC kidney failure , *URETERIC obstruction , *CELLULAR signal transduction - Abstract
Purpose: To determine the anti-fibrosis effect and underlying mechanism of action of catalpol (CAT) in chronic kidney disease (CKD). Methods: Forty (40) rats were randomly divided into a sham group (10 rats) and a unilateral ureteral obstruction (UUO) model group (30 rats) which was further randomly subdivided into three groups of ten (10) rats each: the UUO model group, UUO + CAT low-dose group, and UUO + CAT high-dose group. HK-2 cells were stimulated with TGF-β1 for in vitro studies. Renal injury and fibrotic lesions were determined by H&E and Masson's staining. Key proteins of TGF-β/Smads and Wnt/β-catenin signaling pathways involved in epithelial-mesenchymal transition (EMT) were determined by immunohistochemistry, immunofluorescence staining and Western blotting. Results: Catalpol downregulated the expression of α-SMA (p < 0.05) and upregulated the expression of E-cadherin (p < 0.05) stimulated by TGF-β1 and LiCl in HK-2 cells, which is consistent with the role of DKK1 in vitro. CAT ameliorated renal fibrosis and repressed the expression of key proteins of TGF-β/Smads and Wnt/β-catenin pathways in UUO rats. Conclusion: Catalpol inhibits EMT and alleviates kidney fibrosis by suppressing the hyperactivation of TGF-β/Smad and Wnt/β-catenin signaling pathways. Therefore, CAT is a promising therapeutic drug for renal fibrosis. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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- View/download PDF
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