0000000000163481

AUTHOR

Mayada Metwally

showing 5 related works from this author

Genetic variation in the TLL1 gene is not associated with fibrosis in patients with metabolic associated fatty liver disease.

2020

Metabolic associated fatty liver disease (MAFLD) is the most prevalent liver disease in Western nations, with high heritability. A recent study of Japanese patients with the disease suggested that TLL1 rs17047200 is associated with fibrosis; whether a similar association is observed in Caucasian patients with MAFLD is unknown. We investigated the association of the TLL1 rs17047200 polymorphism with liver fibrosis in a cohort of Caucasian patients with MAFLD (n = 728). We also investigated whether TLL1 expression is altered during liver injury in humans, in murine models of fibrosis, and in in-vitro. While TLL1 expression is upregulated in the liver of humans with MAFLD and in mice, the rs17…

Liver CirrhosisMaleSteatosisGene ExpressionDiseasePathology and Laboratory MedicineInbred C57BLGastroenterologyPathogenesisCytopathologyCohort StudiesLiver diseaseMice0302 clinical medicineFibrosisMedicine and Health SciencesLiver injury0303 health sciencesMultidisciplinaryLiver DiseasesQFatty liverRTLL1Single NucleotideMiddle Aged3. Good healthUp-RegulationAdult; Animals; Cohort Studies; Fatty Liver; Female; Genetic Variation; Humans; Liver Cirrhosis; Male; Mice; Mice Inbred C57BL; Middle Aged; Tolloid-Like Metalloproteinases; Up-Regulation; Polymorphism Single NucleotideMedicineLiver Fibrosis030211 gastroenterology & hepatologyFemaleAnatomyResearch ArticleAdultmedicine.medical_specialtyHistologyTolloid-Like MetalloproteinasesSettore MED/12 - GASTROENTEROLOGIAScienceGastroenterology and HepatologyPolymorphism Single Nucleotide03 medical and health sciencesInternal medicinemedicineGeneticsAnimalsHumansPolymorphism030304 developmental biologyNutritionbusiness.industryAdult Animals Cohort Studies Fatty Liver Female Genetic Variation Humans Liver Cirrhosis Male Mice Mice Inbred C57BL Middle Aged Tolloid-Like Metalloproteinases Up-Regulation Polymorphism Single NucleotideBiology and Life SciencesGenetic Variationmedicine.diseaseFibrosisDietFatty LiverMice Inbred C57BLn/aAnatomical PathologySteatosisbusinessDevelopmental Biology
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Lean NAFLD: A Distinct Entity Shaped by Differential Metabolic Adaptation

2020

Background and Aims: Nonalcoholic fatty liver disease (NAFLD) affects a quarter of the adult population. A significant subset of patients are lean, but their underlying pathophysiology is not well understood. Approach and Results: We investigated the role of bile acids (BAs) and the gut microbiome in the pathogenesis of lean NAFLD. BA and fibroblast growth factor (FGF) 19 levels (a surrogate for intestinal farnesoid X receptor [FXR] activity), patatin-like phospholipase domain containing 3 (PNPLA3), and transmembrane 6 superfamily member 2 (TM6SF2) variants, and gut microbiota profiles in lean and nonlean NAFLD were investigated in a cohort of Caucasian patients with biopsy-proven NAFLD (n …

Male0301 basic medicineReceptors Cytoplasmic and NuclearGut floraMice0302 clinical medicineNon-alcoholic Fatty Liver DiseaseFibrosisNonalcoholic fatty liver diseasebiologyMiddle AgedNAFLD; bile acids; fibrosis; gut microbiota; leanPhospholipases A2 Calcium-IndependentFemale030211 gastroenterology & hepatologyfibrosiAdultmedicine.medical_specialtydigestive systemBile Acids and SaltsCyclic N-Oxides03 medical and health sciencesThinnessInternal medicineNAFLDmedicinebile acidAnimalsHumansbile acidsHepatologygut microbiotabusiness.industryFGF15fibrosisnutritional and metabolic diseasesFGF19leanmedicine.diseasebiology.organism_classificationNAFLD fibrosis lean bile acids gut microbiotadigestive system diseasesGastrointestinal MicrobiomeFibroblast Growth FactorsMice Inbred C57BLDisease Models Animal030104 developmental biologyEndocrinologyFarnesoid X receptorSteatohepatitisbusinessTropanesTM6SF2
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Dual proteotoxic stress accelerates liver injury via activation of p62‐Nrf2

2021

Protein accumulation is the hallmark of various neuronal, muscular, and other human disorders. It is also often seen in the liver as a major protein-secretory organ. For example, aggregation of mutated alpha1-antitrypsin (AAT), referred to as PiZ, is a characteristic feature of AAT deficiency, whereas retention of hepatitis B surface protein (HBs) is found in chronic hepatitis B (CHB) infection. We investigated the interaction of both proteotoxic stresses in humans and mice. Animals overexpressing both PiZ and HBs (HBs-PiZ mice) had greater liver injury, steatosis, and fibrosis. Later they exhibited higher hepatocellular carcinoma load and a more aggressive tumor subtype. Although PiZ and H…

0301 basic medicineCirrhosisNF-E2-Related Factor 2medicine.disease_causePathology and Forensic MedicineMice03 medical and health sciences0302 clinical medicineSDG 3 - Good Health and Well-beingStress PhysiologicalFibrosisSequestosome-1 ProteinmedicineAnimalsHumansLiver injuryHepatitis B Surface Antigensbusiness.industryLiver DiseasesAutophagyHepatitis Bmedicine.diseasedigestive system diseasesaggregate Hepatitis B Surface Antigens Humans Liver Diseases Mice NF-E2-Related Factor 2 Sequestosome-1 Protein Stress Physiological alpha 1-Antitrypsin cirrhosis inclusionlipophagy oxidative stress SERPINA1 Animals030104 developmental biologyalpha 1-Antitrypsin030220 oncology & carcinogenesisHepatocellular carcinomaCancer researchSteatosisbusinessOxidative stressThe Journal of Pathology
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Mistranslation Drives Alterations in Protein Levels and the Effects of a Synonymous Variant at the Fibroblast Growth Factor 21 Locus.

2021

This article also appears in: Health, Medical, and Life Sciences Virtual Issue for Advanced Science.

FGF21General Chemical EngineeringGeneral Physics and AstronomyMedicine (miscellaneous)CODON USAGE BIAS02 engineering and technology01 natural sciencesGLUCOSEACTIVATIONPF-05231023ComputingMilieux_COMPUTERSANDEDUCATIONGeneral Materials SciencegeneticsCells CulturedINSULIN-RESISTANCEFull PaperFatty liverQGeneral Engineeringfibroblast growth factor 21 genetics metabolic metabolic associated fatty liver disease Cells Cultured Enzyme-Linked Immunosorbent Assay Fatty Liver Fibroblast Growth Factors Humans Inflammation LiverFull Papers021001 nanoscience & nanotechnologyPhenotype3. Good healthLiverOBESITY221 Nano-technology0210 nano-technologyReprogrammingEXPRESSIONmedicine.medical_specialtySettore MED/12 - GASTROENTEROLOGIAScienceEnzyme-Linked Immunosorbent Assayfibroblast growth factor 21Biology010402 general chemistryBiochemistry Genetics and Molecular Biology (miscellaneous)metabolic associated fatty liver diseaseInsulin resistancemetabolicInternal medicinemedicineHumansSecretionFGF21 RESISTANCEAlleleInflammationmedicine.disease0104 chemical sciencesFatty LiverFibroblast Growth FactorsEndocrinologyRNA SECONDARY STRUCTURETRANSLATIONHormoneAdvanced science (Weinheim, Baden-Wurttemberg, Germany)
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A STAT4 variant increases liver fibrosis risk in Caucasian patients with chronic hepatitis B

2018

Background Host genetic modifiers of the natural history of chronic hepatitis B (CHB) remain poorly understood. Recently, a genome-wide association study (GWAS)-identified polymorphism in the STAT4 gene that contributes to the risk for hepatocellular carcinoma (HCC) was shown to be associated with the full spectrum of hepatitis B virus (HBV) outcomes in Asian patients. However, the functional mechanisms for this effect are unknown and the role of the variant in modulating HBV disease in Caucasians has not been investigated. Aims To determine whether STAT4 genetic variation is associated with liver injury in Caucasian patients with CHB and to investigate potential mechanisms mediating this e…

musculoskeletal diseases0301 basic medicinemedicine.medical_specialtyGenome-wide association studymedicine.disease_cause03 medical and health sciences0302 clinical medicineSDG 3 - Good Health and Well-beingimmune system diseasesInternal medicinemedicineGenetic predispositionPharmacology (medical)skin and connective tissue diseasesHepatitis B virusHepatologybusiness.industryGastroenterologyhemic and immune systemsHepatologyHepatitis Bmedicine.disease030104 developmental biologyHepatocellular carcinomaImmunologyInterleukin 12030211 gastroenterology & hepatologyViral hepatitisbusinessAlimentary Pharmacology & Therapeutics
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