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Identification of regulatory sequence signatures in microRNA precursors implicated in neurological disorders

Advances in Bioscience and Biotechnology 2013年第5期4卷 26-33页

作者： Sayak Ganguli Sasti Gopal das Hirak Jyoti Chakraborty Sohini Gupta abhijit Datta DBT Centre for Bioinformatics Presidency University Kolkata India

MicroRNAs have emerged as one of the major classes of non-coding RNAs. Recent reports have placed them in high abundance in the nervous system, having key roles in development. Neurological disorders such as Parkinson’s disease, Alzheimer’s disease as well as Huntington disease have also been studied and several microRNAs associated with diseases pathogenesis have been identified. Various such findings indicate differential expression levels of many of these microRNAs. Such changes in the expression levels not only indicate towards a control of the biogenesis of these microRNAs but also indicate towards critical yet unelucidated roles of regulatory proteins, which probably act in concert to control the production or maturation of these molecules. In this work, a collection of overrepresented regulatory motif signatures were identified in the DNA and RNA sequences of the precursor microRNAs. The identification of such regulatory sequence signatures promises to provide new insights into many facets of microRNA regulation and neurological disorders.

关键词： Neurological Diseases Regulatory Motif Signatures Parkinson’s Disease Alzheimer’s Disease Huntington Disease

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The transcontinental variability of nonalcoholic fatty liver disease

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Hepatoma Research 2020年第10期6卷 75-87页

作者： Claudia P.Oliveira Angelo Paredes Mohammed Siddiqui Lawrence Serfaty abhijit Chowdhury Jose Tadeu Stefano Denise Siqueira Vanni Sherry Boyett Arun J.Sanyal Department of Gastroenterology Faculdade de Medicina da Universidade de São PauloSão PauloSP 01000-000Brazil Laboratório de Gastroenterologia Clínica e Experimental(LIM-07)do Departamento de Gastroenterologia e Hepatologia do Hospital das Clínicas HCFMUSP da Faculdade de Medicina da Universidade de São Paulo São PauloSP 01000-000Brazil Internal Medicine Gastroenterology and Hepatology ServicesBrooke Army Medical CenterSan AntonioTX 78234USA Div.of Gastroenterology Hepatology and NutritionDept.of Internal MedicineVirginia Commonwealth University School of MedicineRichmondVA 23298-0341USA Viral and Metabolic Liver Unit Department of HepatologySaint-Antoine Hospital75012 ParisParis Department of Hepatology School of Digestive and Liver DiseaseInstitute of Post Graduate Medical Education&ResearchKolkata 700020India Disease Biology John C Martin Centre for Liver Research and Innovations SonarpurKolkata 7000150India

Aim:To compare the phenotype of lean versus overweight(OW)and obese(OB)subjects with non-alcoholic fatty liver disease(NAFLD)across multiple ***:A retrospective study of histologically defined subjects from a single center each in France(Fr),Brazil(Br),India(In)and United States(US)was ***:A total of 70 lean[body mass index(BMI)25 kg/m2,BMI29 kg/m2)(n=81:11:22:103).Lean French subjects had the lowest incidence of type 2 diabetes while those from Brazil(P<0.01)had the *** subjects had similar low-density lipoprotein-cholesterol,but higher high-density lipoprotein-cholesterol compared to obese subjects in all *** both lean and obese subjects,there were both insulin-sensitive and insulin-resistant *** French subjects were most insulin-sensitive while those from Brazil were mostly *** each weight category,subjects from India were more insulin-sensitive than those from other *** activity increased from lean to overweight to obese in France but was similar across weight categories in other ***:The phenotype of NAFLD in lean subjects varies by *** obese subjects with NAFLD are *** hypothesize that genetics and region-specific disease modifiers account for these differences.

关键词： Non-alcoholic fatty liver disease phenotype epidemiology demographics

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