Xiaomei Xu

ORCID: 0000-0002-1276-5559
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About
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Research Areas
  • Photosynthetic Processes and Mechanisms
  • Biocrusts and Microbial Ecology
  • Receptor Mechanisms and Signaling
  • Neurogenesis and neuroplasticity mechanisms
  • Microbial Community Ecology and Physiology
  • Cardiac electrophysiology and arrhythmias
  • dental development and anomalies
  • Gut microbiota and health
  • Metabolism, Diabetes, and Cancer
  • Biochemical effects in animals
  • Protein Kinase Regulation and GTPase Signaling
  • Barrier Structure and Function Studies
  • Algal biology and biofuel production
  • Nerve injury and regeneration
  • Acute Kidney Injury Research
  • Circadian rhythm and melatonin
  • Dental Implant Techniques and Outcomes
  • Obstructive Sleep Apnea Research
  • Dietary Effects on Health
  • Plant pathogens and resistance mechanisms
  • Animal Nutrition and Physiology
  • Heart Failure Treatment and Management
  • Pancreatic function and diabetes
  • Periodontal Regeneration and Treatments
  • TGF-β signaling in diseases

Institute of Hydrobiology
2023

Chinese Academy of Sciences
2023

Laboratoire de Chimie Bactérienne
2020-2022

Sichuan Agricultural University
2019-2021

Ministry of Education of the People's Republic of China
2019-2021

Ministry of Agriculture and Rural Affairs
2019-2021

Guangdong Academy of Agricultural Sciences
2021

Centre National de la Recherche Scientifique
2020

Jinzhou Medical University
2019

CNR de la Résistance aux Antibiotiques
2019

The purpose of this study was to develop a model for assessing the 5-year risk developing type 2 diabetes from panel 64 circulating candidate biomarkers.Subjects were selected Inter99 cohort, longitudinal population-based approximately 6,600 Danes in nested case-control design with primary outcome conversion diabetes. Nondiabetic subjects, aged >or=39 years, BMI >or=25 kg/m(2) at baseline selected. Baseline fasting serum samples 160 individuals who developed and 472 did not tested. An...

10.2337/dc08-1935 article EN cc-by-nc-nd Diabetes Care 2009-06-29

Alterations in cardiac G protein-mediated signaling, most prominently G(q/11) are centrally involved hypertrophy and heart failure development. Several RGS proteins that can act as negative regulators of protein signaling expressed the heart, but their functional roles still poorly understood. expression changes have been described hypertrophic failing hearts. In this study, we report a marked decrease RGS2 (but not other major (RGS3-RGS5)) occurs prior to development different models with...

10.1074/jbc.m507871200 article EN cc-by Journal of Biological Chemistry 2005-12-28

The semaphorin family contains a large number of secreted and transmembrane proteins, some which are known to act as repulsive axon guidance cues during development or be involved in immune function. We report here on the identification K1 (sema K1), first associated with cell surfaces via glycosylphosphatidylinositol linkage. Sema is highly homologous viral can interact specific cells, suggesting that like its counterpart, sema could play an important role regulating does not bind...

10.1074/jbc.273.35.22428 article EN cc-by Journal of Biological Chemistry 1998-08-01

Cyclic-di-GMP (c-di-GMP) is a ubiquitous bacterial signaling molecule. It also critical player in the regulation of cell size and behaviors such as aggregation phototaxis cyanobacteria, which constitute an important group prokaryotes for their roles ecology evolution Earth. However, c-di-GMP receptors have never been revealed cyanobacteria. Here, we report identification receptor, CdgR, from filamentous cyanobacterium Anabaena PCC 7120. Crystal structural analysis genetic studies demonstrate...

10.1073/pnas.2221874120 article EN cc-by-nc-nd Proceedings of the National Academy of Sciences 2023-03-22

Aging people's bone regeneration potential is always impaired. Bone marrow stromal cells (MSCs) contain progenitors of osteoblasts. Donor age may affect MSCs' proliferation and differentiation potential, but the genomic base still unknown. Due to recent research's indication that a core circadian component, brain muscle ARNT-like 1 protein (BMAL1), has role in premature aging, we investigated normal aging mechanism mice with their MSCs Bmal1 gene/protein level.1, 6 16 month old C57BL/6 were...

10.5114/aoms.2012.27277 article EN cc-by-nc-sa Archives of Medical Science 2012-01-01

This study aimed to investigate the effect of putrescine on immune function and intestinal bacteria weaning piglets. Twenty-four male castrated piglets their 21st day were randomly assigned into four groups: control (basal diet) treatment groups given basal diets supplemented with 0.05%, 0.1%, 0.15% for 11 days. Results as follows: (1) Dietary increased villus height, width, height/crypt depth surface area, decreased diarrhea index (P < 0.05). (2) lysozyme acid phosphatase activities amount...

10.1039/c9fo00842j article EN Food & Function 2019-01-01

Biomarkers for estimating reduced glucose tolerance, insulin sensitivity, or impaired secretion would be clinically useful, since these physiologic measures are important in the pathogenesis of type 2 diabetes mellitus.We conducted a cross-sectional study which 94 individuals, whom 84 had 1 more risk factors and 10 no known diabetes, underwent oral tolerance testing. We measured 34 protein biomarkers associated with 250-μL fasting serum samples. applied multiple regression selection...

10.1373/clinchem.2010.156133 article EN Clinical Chemistry 2010-12-14

Hanks-type kinases encoding genes are present in most cyanobacterial genomes. Despite their widespread pattern of conservation, little is known so far about role because substrates and the conditions triggering activation poorly known. Here we report that under diazotrophic conditions, normal heterocyst differentiation growth filamentous cyanobacterium Nostoc PCC 7120 require presence Pkn22 kinase, which induced combined nitrogen starvation conditions. By analyzing phenotype pkn22 mutant...

10.3389/fmicb.2019.03140 article EN cc-by Frontiers in Microbiology 2020-01-21

Local activation and long-range inhibition are mechanisms conserved in self-organizing systems leading to biological patterns. A number of them involve the production by developing cell an inhibitory morphogen, but how this becomes immune self-inhibition is rather unknown. Under combined nitrogen starvation, multicellular cyanobacterium Nostoc PCC 7120 develops nitrogen-fixing heterocysts with a pattern one heterocyst every 10–12 vegetative cells. Cell differentiation regulated HetR which...

10.7554/elife.59190 article EN cc-by eLife 2020-08-07

In contrast to the other heterotrimeric GTP-binding proteins (G proteins) G s and i , functional role of o is still poorly defined. To investigate Gα in heart, we generated transgenic mice with cardiac-specific expression a constitutively active form o1 * (Gα *), predominant isoform heart. was increased 3- 15-fold from 5 independent lines, all which had normal life span no gross cardiac morphological abnormalities. We demonstrate enhanced contractile function vivo, along L-type Ca 2+ channel...

10.1152/ajpheart.00584.2007 article EN AJP Heart and Circulatory Physiology 2008-01-12

This investigation characterizes an acyltransferase enzyme responsible for the pathogenicity of Phytophthora melonis. The protein was characterized in vitro its physicochemical properties. biochemical characterization, including thermal and pH stability, revealed 35 °C temperature 7.0 as optimum conditions enzyme. Applying Tween-80 solution enhanced activity up to 124.9%. Comprehensive structural annotation two domains, A (ranging from residues 260 620) B 141 219). Domain had...

10.1021/acsomega.0c03186 article EN cc-by-nc-nd ACS Omega 2021-01-13

Weaning stress can cause metabolic disorders, gastrointestinal dysfunction, physical barrier injury and disease susceptibility, thus leading to impaired growth health of animals. Putrescine has the potential reduce effects. However, role putrescine supplementation on function antioxidant capacity in animals' organs is largely unknown. This study evaluates effects function, status related signalling molecule levels weaning piglets' organs. A total 24 piglets were assigned four treatment...

10.1039/c9ra02674f article EN cc-by-nc RSC Advances 2019-01-01

Whether spermine promotes the repair of porcine intestinal epithelium damage through Ras-related C3 botulinum toxin substrate 1 (Rac1)/phospholipase C-γ1 (PLC-γ1) signaling remains unclear. The current study investigated effects addition on proliferation and migration IPEC-J2 cells Rac1/PLC-γ1 cell migration. We showed that inhibitors Rac1 (NSC-23766) PLC-γ1 (U73122) reduced decreased protein levels in cells. Moreover, promoted cells, is, µM exhibited best effect, treatment increased PLC-γ1....

10.1080/10495398.2021.1955699 article EN Animal Biotechnology 2021-08-08

Introduction: Orthodontic tooth movement occurs as a consequence of paradental tissue remodeling in response to applied mechanical forces. Retention is necessary procedure prevent relapse when orthodontic appliances are removed. Developing new methods promote stability and retention following treatment has always been desired. Recent studies have demonstrated the favorable effects low magnitude, high frequency (LMHF) vibration on bone homeostasis through an ability stimulate cell metabolism...

10.4103/2155-8213.136751 article EN cc-by-nc-sa Dental Hypotheses 2014-01-01

Weaning stress can cause tight junctions damage and intestinal permeability enhancement, which leads to imbalance growth retardation, thereby causing piglet development. Spermine reduce stress. However, the mechanism of spermine modulating integrity in pigs remains largely unknown. This study aims examine whether protects barrier piglets through ras-related C3 botulinum toxin substrate 1 (Rac1)/phospholipase C-γ1 (PLC-γ1) signaling pathway. In vivo, 80 were categorised into 4 control groups...

10.1016/j.aninu.2021.06.016 article EN cc-by-nc-nd Animal nutrition 2021-10-14

To investigate the effect of electroacupuncture (EA) at "Dazhui" (GV14) and "Ciliao" (BL32) on rats with bladder detrusor hyperreflexia (DH) after supersacral spinal cord transection, as well mechanism EA in improving urinary function by regulating expression Wnt-1, β-catenin Neurogenin 1(Ngn1).A total 48 female Sprague-Dawley were randomly divided into sham-operation group, model control 12 each group. T10 transection (SCT) was performed surgery. The Basso, Beattie Bresnahan (BBB) score...

10.13702/j.1000-0607.190129 article EN PubMed 2019-10-25

Abstract Local activation and long-range inhibition are mechanisms conserved in self-organizing systems leading to biological patterns. A number of them involve the production by developing cell an inhibitory morphogen, but how this gets immune self-inhibition is rather unknown. Under combined nitrogen starvation, multicellular cyanobacterium Nostoc PCC 7120 develops nitrogen-fixing heterocysts with a pattern heterocyst every 10-12 vegetative cells. Cell differentiation regulated HetR which...

10.1101/2020.05.21.108365 preprint EN bioRxiv (Cold Spring Harbor Laboratory) 2020-05-21
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