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Interindividual Age-Independent Differences in Human CX43 Impact Ventricular Arrhythmic Risk

Research 2024年第3期6卷 417-432页

作者： Laura García-Mendívil María pérez-Zabalza Antoni Oliver-Gelabert JoséMaría Vallejo-Gil javier Fañanás-Mastral Manuel Vázquez-Sancho javier AndréBellido-Morales Alexánder Sebastián Vaca-Núñez Carlos Ballester-Cuenca Emiliano Diez Laura Ordovás Esther pueyo Biomedical Signal Interpretation and Computational Simulation group(BSICoS) Aragón Institute of Engineering ResearchUniversity of ZaragozaZaragoza 50018Spain BSICoS Instituto de Investigación Sanitaria Aragón(IISA)Zaragoza 50018Spain Centro Universitario de la Defensa(CUD) Zaragoza 50090Spain. Department of Cardiovascular Surgery University Hospital Miguel ServetZaragoza 50009Spain. Institute of Experimental Medicine and Biology of Cuyo(IMBECU) CONICETMendoza 5500Argentina. Fundación Agencia Aragonesa para la Investigación y el Desarrollo(ARAID) Zaragoza 50018Spain. Biomedical Research Networking Center in Bioengineering Biomaterials and Nanomedicine(CIBER-BBN)Zaragoza 50018Spain.

Connexin 43 (CX43) is one of the major components of gap junctions, the structures responsible for the intercellular communication and transmission of the electrical impulse in the left ventricle. There is limited information on the histological changes of CX43 with age and their effect on electrophysiology, especially in humans. Here, we analyzed left ventricular biopsies from living donors starting at midlife to characterize age-related CX43 remodeling. We assessed its quantity, degree of lateralization, and spatial heterogeneity together with fibrotic deposition. We observed no significant age-related remodeling of CX43. Only spatial heterogeneity increased slightly with age, and this increase was better explained by biological age than by chronological age. Importantly, we found that CX43 features varied considerably among individuals in our population with no relevant relationship to age or fibrosis content, in contrast to animal species. We used our experimental results to feed computational models of human ventricular electrophysiology and to assess the effects of interindividual differences in specific features of CX43 and fibrosis on conduction velocity, action potential duration, and arrhythmogenicity. We found that larger amounts of fibrosis were associated with the highest arrhythmic risk, with this risk being increased when fibrosis deposition was combined with a reduction in CX43 amount and/or with an increase in CX43 spatial heterogeneity. These mechanisms underlying high arrhythmic risk in some individuals were not associated with age in our study population. In conclusion, our data rule out CX43 remodeling as an age-related arrhythmic substrate in the population beyond midlife, but highlight its potential as a proarrhythmic factor at the individual level, especially when combined with increased fibrosis.

关键词： CX43 rhythm Independent

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Differential response of injured and healthy retinas to syngeneic and allogeneic transplantation of a clonal cell line of immortalized olfactory ensheathing glia:a double-edged sword

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Neural Regeneration Research 2025年第8期20卷 2395-2407页

作者： María Norte-Muñoz María portela-Lomba paloma Sobrado-Calvo Diana Simón Johnny Di pierdomenico Alejandro Gallego-Ortega Mar pérez JoséMCabrera-Maqueda javier Sierra Manuel Vidal-Sanz María Teresa Moreno-Flores Marta Agudo-Barriuso Grupo de Investigación Oftalmología Experimental Departamento de OftalmologíaOptometríaOtorrinolaringología y Anatomía PatológicaFacultad de MedicinaUniversidad de MurciaInstituto Murciano de Investigación Biosanitaria(IMIB)Campus de Ciencias de la SaludMurciaSpain Experimental Sciences Faculty Universidad Francisco de VitoriaPozuelo de AlarcónMadridSpain Anatomy Histology and Neuroscience DepartmentMedicine FacultyUniversidad Autónoma de MadridMadridSpain Center of Neuroimmunology Service of NeurologyLaboratory of Advanced Imaging in Neuroimmunological DiseasesHospital Clínic of BarcelonaInstitut d’Investigacions Biomèdiques August Pi i Sunyer(IDIBAPS)and Universitat de BarcelonaBarcelonaSpain Medicine Faculty Universidad Francisco de VitoriaPozuelo de AlarcónMadridSpain

Olfactory ensheathing glia promote axonal regeneration in the mammalian central nervous system,including retinal ganglion cell axonal growth through the injured optic ***,it is unknown whether olfactory ensheathing glia also have neuroprotective *** ensheathing glia express brain-derived neurotrophic factor,one of the best neuroprotectants for axotomized retinal ganglion ***,we aimed to investigate the neuroprotective capacity of olfactory ensheating glia after optic nerve *** ensheathing glia cells from an established rat immortalized clonal cell line,TEG3,were intravitreally injected in intact and axotomized retinas in syngeneic and allogeneic mode with or without microglial inhibition or immunosuppressive *** and gene expression analyses were *** bulb-derived primary olfactory ensheathing glia and TEG3 express major histocompatibility complex classⅡ*** and syngenically transplanted TEG3 cells survived in the vitreous for up to 21 days,forming an *** axotomized retinas,only the allogeneic TEG3 transplant rescued retinal ganglion cells at 7 days but not at 21 *** these retinas,microglial anatomical activation was higher than after optic nerve crush *** intact retinas,both transplants activated microglial cells and caused retinal ganglion cell death at 21 days,a loss that was higher after allotransplantation,triggered by pyroptosis and partially rescued by microglial inhibition or ***,neuroprotection of axotomized retinal ganglion cells did not improve with these *** different neuroprotective properties,different toxic effects,and different responses to microglial inhibitory treatments of olfactory ensheathing glia in the retina depending on the type of transplant highlight the importance of thorough preclinical studies to explore these variables.

关键词： cell therapy immune recognition major histocompatibility complex class II(MHCII) neuroprotection olfactory ensheathing glia retinal ganglion cells

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Global prevalence and gender inequalities in at least 60 min of self-reported moderate-to-vigorous physical activity 1 or more days per week:An analysis with 707,616 adolescents

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Journal of Sport and Health Science 2024年第5期13卷 709-716页

作者： Raphael H.O.Araujo AndrúO.Werneck Clarice L.Martins Luciana L.Barboza Rafael M.Tassitano Nicolas Aguilar-Farias Gilmar M.Jesus Robinson ram.rez-Véelez Riki Tesler Adewale L.Oyeyemi Ellen C.M.Silva Robert G.Weaver Mark S.Tremblay javier Brazo-Sayavera Grégore I.Mielke Danilo R.p.Silva Graduation program in Health Sciences Londrina State University(UEL)Londrina 86057-970Brazil Center for Epidemiological Research in Nutrition and Health Department of NutritionSchool of Public HealthUniversidade de Sao Paulo(USP)Sao Paulo 01246-904Brazil Department of physical Education Federal University of ParaıbaParaıba 58051-900Brazil Research Centre of physical Activity Health and LeisureFaculty of SportsLaboratory for Integrative and Translational Research in Population Health(ITR)University of PortoPorto 4500Portugal postgraduate program in physical Education University of BrasıliaBrasılia 70910-900Brazil Department of Kinesiology and Community Health University of Illinois at Urbana-ChampaignChampaignIL 61801-3841USA Department of physical Education Sports and RecreationUniversidad de La FronteraTemuco 4680000Chile Department of Health State University of Feira de SantanaFeira de Santana 44036-900Brazil Navarrabiomed Hospital Universitario de Navarra(HUN)Navarra Institute for Health Research(IdiSNA)Universidad Publica de Navarra(UPNA)Pamplona 31006Spain Facultad de Ciencias de la Educacion Unidad Central del Valle del Cauca(UCEVA)TuluaValle del Cauca 763022Colombia Health Management Department Faculty of Heath sciencesAriel UniversityAriel 40700Israel College of Health Solutions Arizona State UniversityPhoenixAZ 85004USA Arnold School of public Health University of South CarolinaColumbiaSC 29208USA Healthy Active Living and Obesity Research Group Children’s Hospital of Eastern Ontario Research InstituteOttawaON K1H 8L1Canada Department of pediatrics University of OttawaOttawaON K1H 8L1Canada Department of Health Sciences Carleton UniversityOttawaON K1S 5B6Canada Department of Sports and Computer Science Universidad Pablo de Olavide(UPO)Seville 41013Spain Centro Universitario Regional Noreste Universidad de la RepublicaRivera 40000Uruguay School of public Health The University of QueenslandBrisbaneQLD 4006Australia Department of physical Education

Background:Guidelines recommend that adolescents should accumulate an average of 60 min per day of moderate-to-vigorous physical activity(MVpA).However,using only this cut-off could hide important *** instance,from a population-level point of view,increasing physical activity for those with no or low physical activity could provide more health benefits than increasing physical activity for those with intermediate ***,including a more sensitive cut-point of≥1 days per week could be an additional strategy for identifying those with low access/opportunities for physical activity ***,the current study aims to estimate the prevalence of≥60 min of MVpA≥1 days per week among adolescents globally,and to describe any relevant gender ***:We used representative datasets from 146 countries/territories collected between 2003 and *** was *** were grouped into younger(≤14 years old)and older(>14 years old)*** poisson regression models were used to identify the relative differences in≥60 min of MVpA≥1 days per week between boys and girls,and random-effects meta-analysis models were used to identify the pooled *** were stratified by country and ***:Approximately 80%of both younger and older adolescents reported≥60 min of MVpA≥1 days per *** prevalence was≥94%in Europe and Central Asia and North America,while the estimates for the other regions wereprevalence of≥60 min of MVpA≥1 days per week was higher among boys than girls,with the largest differences occurring among the oldest adolescents(prevalence ratio_(≤14y)=1.04(95%confidence interval(95%CI)):1.03-1.04)*** ratio_(>14y)=1.09(95%CI:1.08-1.10)).Conclusion:Approximately 8 out of 10 adolescents reported accumulating≥60 min of MVpA≥1 days per week,with notable differences between *** differences were observed in several countries,especially among the oldest *** fo

关键词： Global School-based Student Health Survey Health Behaviour Among School-aged Children survey Inequality Surveillance Youth

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Ceria in halogen chemistry

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Chinese Journal of Catalysis 2020年第6期41卷 915-927页

作者： Matthias Scharfe Guido Zichittella Vladimir paunovic javier pérez-ram.rez Institute for Chemical and Bioengineering Department of Chemistry and Applied BiosciencesETH ZurichVladimir-Prelog-Weg 18093 ZurichSwitzerland

Halogen chemistry constitutes an essential part in the industrial production of polymers and gains increasing attention as an attractive strategy to activate light alkanes that constitute natural gas. CeO2-based catalysts offer an exciting potential for advances in hydrogen halide recovery that enables a high efficiency of halogen-based processes for activation of small molecules. This review provides an overview of recently developed ceria-based catalysts in the context of polymer industry(polyvinyl chloride, polyurethanes, and polycarbonates) and activation of light hydrocarbons for natural gas upgrading. In addition, mechanistic insight and the challenges of ceria catalysts are provided, aiding the design of future catalytic materials and applications.

关键词： CeO2 Hydrogen halides Ethylene Alkanes Selective natural gas upgrading Oxidation Oxyhalogenation Vinyl chloride

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Anthropomorphism Indexes of the Kinematic Chain for Artificial Hands

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Journal of Bionic Engineering 2020年第3期17卷 501-511页

作者： Immaculada Llop-Harillo Antonio pérez-González javier Andrés-Esperanza Grupo de Biomecdnicay Ergonomia Departamento de Ingenieria Mecdnicay Construccidny Universitat Jaume I(UJI)Castelldn 12071Spain

Anthropomorphic hands have received increasing research interest in the fields of robotics and *** it is not yet clear how to evaluate their *** in the kinematic chain is essential to achieve both functionality and cosmesis.A few previous works have addressed the definition of anthropomorphism indexes,although they have some limitations in its *** this study,three different anthropomorphism indexes have been defined to compare the kinematic chain of artificial hands with that of the human *** indexes are based on the comparison of:(I)the parameters of the kinematic chain(dimensions,type of joints,orientations and ranges of motion),(2)the reachable workspace,and(3)common grasping *** artificial hands with different degrees of anthropomorphism have been compared using the three Anthropomorphism Indexes of the Kinematic Chain(AIKC).The results show a high correlation between the first and third AIKC for the hands *** second AIKC presents much lower values than the other two,although they are higher for hands that combine abduction/adduction and flexion/extension movements in the kinematic chain of each *** indexes can be useful during the initial stage of designing artificial hands or evaluating their anthropomorphism.

关键词： anthropomorphism grasping indexes kinematics multifingered hands

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Single-atom heterogeneous catalysts based on distinct carbon nitride scaffolds

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National Science Review 2018年第5期5卷 642-652页

作者： Zupeng Chen Evgeniya Vorobyeva Sharon Mitchell Edvin Fako Nuúria López Sean M.Collins Rowan K.Leary paul A.Midgley RolAND Hauert javier pérez-ram.rez Institute for Chemical and Bioengineering Department of Chemistry and Applied BiosciencesETHZurich Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology 3. Department of Materials Science and MetallurgyUniversity of Cambridge 4. EmpaSwiss Federal Laboratories for Materials Science and Technology

Carbon nitrides integrating macroheterocycles offer unique potential as hosts for stabilizing metal atoms due to their rich electronic structure. To date, only graphitic heptazine-based polymers have been ***, we demonstrate that palladium atoms can be effectively isolated on other carbon nitride scaffolds including linear melem oligomers and poly(triazine/heptazine imides). Increased metal uptake was linked to the larger cavity size and the presence of chloride ions in the polyimide structures. Changing the host structure leads to significant variation in the average oxidation state of the metal, which can be tuned by exchange of the ionic species as evidenced by X-ray photoelectron spectroscopy and supported by density functional theory. Evaluation in the semi-hydrogenation of 2-methyl-3-butyn-2-ol reveals an inverse correlation between the activity and the degree of oxidation of palladium, with oligomers exhibiting the highest activity. These findings provide new mechanistic insights into the influence of the carbon nitride structure on metal stabilization.

关键词： single-atom heterogeneous catalysts carbon nitride scaffolds alkyne semi-hydrogenation density functional theory metal–host interaction

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Exercise training-induced changes in exerkine concentrations may be relevant to the metabolic control of type 2 diabetes mellitus patients:A systematic review and meta-analysis of randomized controlled trials

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Journal of Sport and Health Science 2023年第2期12卷 147-157页

作者： Antonio García-Hermoso Robinson ram.rez-Vélez javier Díez Arantxa González Mikel Izquierdo Navarrabiomed Public University of Navarra(UPNA)Health Research Institute of Navarra(IdiSNA)University Hospital of NavarraPamplona 310008Spain CIBER of Frailty and Healthy Aging(CIBERFES) Carlos Ⅲ Institute of HealthMadrid 28029Spain Institute for Health Research of Navarra(IDISNA) Pamplona 31008Spain program of Cardiovascular Diseases Center for Applied Medical ResearchUniversity of NavarraPamplona 31008Spain Centre for Biomedical Research in Cardiovascular Disease Network Carlos Ⅲ Institute of HealthMadrid 28029Spain Departments of Nephrology and Cardiology University of Navarra ClinicPamplona 31008Spain

Background:This study investigates the effects of exercise training on exerkines in patients with type 2 diabetes mellitus to determine the optimal exercise ***:A systematic search for relevant studies was performed in 3 *** controlled trials investigating the effects of exercise training on at least one of the following exerkines were included:adiponectin,apelin,brain-derived neurotrophic factor,fetuin-A,fibroblast growth factor-21,follistatin,ghrelin,interleukin(IL)-6,IL-8,IL-10,IL-15,IL-18,leptin,myostatin,omentin,resistin,retinol-binding protein 4,tumor necrosis factor-α,and ***:Forty randomized controlled trials were selected for data extraction(n=2160).Exercise training induces changes in adiponectin,fetuin-A,fibroblast growth factor-21,IL-6,IL-10,leptin,resistin,and tumor necrosis factor-a levels but has no significant effects on apelin,IL-18,and ghrelin compared to *** exercise training favored large and positive changes in pooled exerkines(i.e.,an overall effect size calculated from several exerkine s)(Hedge’s g=1.02,95%confidence interval(95%CI):0.76-1.28),which in turn were related to changes in glycated hemoglobin(mean difference(MD)=-0.81%,95%CI:-0.95%to-0.67%),fasting glucose(MD=-23.43 mg/dL,95%CI:-30.07 mg/dL to-16.80 mg/dL),waist circumference(MD=-3.04 cm,95%CI:-4.02 cm to-2.07 cm),and body mass(MD=-1.93 kg,95%CI:-2.00 kg to-1.86 kg).Slightly stronger effects were observed with aerobic,resistance,or high-intensity interval protocols at moderate-to vigorous-intensity and with programs longer than 24 weeks that comprise at least 3 sessions per week and more than 60 min per ***:Exercise training represents an anti-inflammatory therapy and metabolism-improving strategy with minimal side effects for patients with type 2 diabetes mellitus.

关键词： Adipokines Exercise training Hepatokines Myokines

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ON A CLASS OF RIEMANN SURFACES

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Analysis in Theory and Applications 2006年第4期22卷 377-386页

作者： Arturo Fernández javier pérez Ciudad Universitaria Spain

It is considered the class of Riemann surfaces with dimT1=0, where T1 is a subclass of exactharmonic forms which is one of the factors in the orthogonal decomposition of the space Ω^H of harmonic forms of the surface, namely Ω^H=＊Ω^H＋T1＋＊T0^H＋T0^H＋T2The surfaces in the class OHD and the clase of planar surfaces satisfy dimT1 =0. *** posed the question whether there might exist other surfaces outside those two classes. Here it is shown that in the case of finite genus g, we should look for a surface S with dimTl = 0 among the surfaces of the form Sg／K , where Sg is a closed surface of genus g and K a compact set of positive harmonic measure with perfect components and very irregular boundary.

关键词： Harmonic form orthogonal decomposition Diriehlet norm

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Factors associated with early virological response to peginterferon-α-2a/ribavirin in chronic hepatitis C

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World Journal of Gastroenterology 2013年第12期19卷 1943-1952页

作者： javier García-Samaniego Miriam Romero Rafael Granados Remedios Alemán Miguel Jorge Juan Dolores Suárez ramón pérez Gregorio Castellano Carlos González-portela Liver Unit Hospital Carlos Ⅲ Centro de Investigación Biómedica en Red de Enfermedades Hepáticas y Digestivas Department of Gastroenterology Hospital Universitario de Gran Canaria Gastroenterology Service Hospital Universitario de Canarias Department of Gastroenterology Hospital Universitario Insular de Gran Canaria Internal Medicine Service Hospital Arquitecto Marcide Gastroenterology Service Hospital Central de Asturias Gastroenterology Service Hospital 12 de Octubre Gastroenterology Service Hospital Policlínico de Vigo

AIM: To evaluate the impact of sociodemographic/clinical factors on early virological response (EVR) to pegin-terferon/ribavirin for chronic hepatitis C (CHC) in clinical practice. METHODS: We conducted a multicenter, cross-sectional, observational study in Hepatology Units of 91 Spanish hospitals. CHC patients treated with peginterferon α-2a plus ribavirin were included. EVR was defined as undetectable hepatitis C virus (HCV)-ribonucleic acid (RNA) or ≥ 2 log HCV-RNA decrease after 12 wk of treatment. A bivariate analysis of sociodemographic and clinical variables associated with EVR was carried out. Independent factors associated with an EVR were analyzed using a multiple regression analysis that included the following baseline demographic and clinical variables: age (≤ 40 years vs > 40 years), gender, race, educational level, marital status and family status, weight, alcohol and tobacco consumption, source of HCV infection, alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels, and gamma glutamyl transpeptidase (GGT) (≤ 85 IU/mL vs > 85 IU/mL), serum ferritin, serum HCV-RNA concentration (pe (1/4 vs 3/4), cirrhotic status and ribavirin dose (800/1000/1200 mg/d).RESULTS: A total of 1014 patients were included in the study. Mean age of the patients was 44.3 ± 9.8 years, 70% were male, and 97% were Caucasian. The main sources of HCV infection were intravenous drug abuse (25%) and blood transfusion (23%). Seventyeight percent were infected with HCV genotype 1/4 (68% had genotype 1) and 22% with genotypes 2/3. The HCV-RNA level was > 400 000 IU/mL in 74% of patients. The mean ALT and AST levels were 88.4 ± 69.7 IU/mL and 73.9 ± 64.4 IU/mL, respectively, and mean GGT level was 82 ± 91.6 IU/mL. The mean ferritin level was 266 ± 284.8 μg/L. Only 6.2% of patients presented with cirrhosis. All patients received 180 mg of peginterferon α-2a. The most frequently used ribavirin doses were 1000 mg/d (41%) and 1200 mg/d (41%).

关键词： Antiviral therapy Baseline factors Early virological response peginterferon α-2a Ribavirin

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The short form of the SUR1 and its functional implications in the damaged brain

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Neural Regeneration Research 2022年第3期17卷 488-496页

作者： Iván Alquisiras-Burgos javier Franco-pérez Moisés Rubio-Osornio penélope Aguilera Laboratorio de patología Vascular Cerebral Instituto Nacional de Neurología y Neurocirugía“Manuel Velasco Suárez”CDMXMexico Laboratorio de Formación Reticular Instituto Nacional de Neurología y Neurocirugía“Manuel Velasco Suárez”CDMXMexico Laboratorio Experimental de Enfermedades Neurodegenerativas Instituto Nacional de Neurología y Neurocirugía“Manuel Velasco Suárez”CDMXMexico.

Sulfonylurea receptor(SUR) belongs to the adenosine 5′-triphosphate(ATp)-binding cassette(ABC) transporter family;however,SUR is associated with ion channels and acts as a regulatory subunit determining the opening or closing of the ***8 and Abcc9 genes code for the proteins SUR1 and SUR2,*** SUR1 transcript encodes a protein of 1582 amino acids with a mass around 140–177 k Da expressed in the pancreas,brain,heart,and other *** is well known that SUR1 assembles with Kir6.2 and TRpM4 to establish K_(ATp) channels and non-selective cation channels,***8 and 9 are alternatively spliced,and the resulting transcripts encode different isoforms of SUR1 and SUR2,which have been detected by different experimental ***,the use of binding assays to sulfonylureas and Western blotting has allowed the detection of shorter forms of SUR(-65 k Da).Identity of the SUR1 variants has not been clarified,and some authors have suggested that the shorter forms are ***,immunoprecipitation assays have shown that SUR2 short forms are part of a functional channel even coexisting with the typical forms of the receptor in the *** evidence confirms that the structure of the short forms of the SURs is fully functional and does not lose the ability to interact with the *** structural changes in short forms of SUR modify its affinity to ATp,regulation of its expression might represent an advantage in pathologies where ATp concentrations decrease and a therapeutic target to induce ***,the expression of SUR1 variants might be induced by conditions associated to the decrease of energetic substrates in the brain(*** stroke and epilepsy).In this review,we want to contribute to the knowledge of SUR1 complexity by analyzing evidence that shows the existence of short SUR1 variants and its possible implications in brain function.

关键词： brain edema epilepsy parkinson's disease stroke sulfonylurea receptor 1 SUR1 traumatic brain injury TRpM4

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