title: Changes in adipose tissue cellular composition during obesity and aging as a cause of metabolic dysregulation.
abstract: Adipose tissue represents complex endocrine organ containing several different cellular populations including adipocytes, pre-adipocytes, mesenchymal stem cells, macrophages and lymphocytes. It is well establishing that these populations are not static but alter during obesity and aging. Changes in cellular populations alter inflammatory status and other common metabolic complications arise, therefore adipose tissue cellular composition helps dictate its endocrine and regulatory function. During excessive weight gain in obese individuals and as we age there is shift towards increase populations of inflammatory macrophages with a decrease of regulatory T cell. This altered cellular composition promote chronic low grade inflammation negatively affecting mesenchymal stem cell progenitor self-renewal, which result in deterioration of adipogenesis and increased cellular stress in adipocytes. All these changes promote metabolic disorders including age- or obese-related insulin resistance leading to type 2 diabetes.
authors.affiliation: College of Medicine, Burnett School of Biomedical Sciences, University of Central Florida, Orlando, FL 32827, United States.
authors.forename: Kari
authors.initials: K
authors.lastname: Martyniak
authors.affiliation: College of Medicine, Burnett School of Biomedical Sciences, University of Central Florida, Orlando, FL 32827, United States; Department of Head and Neck Surgery, The Greater Poland Cancer Centre, Poznan, Poland. Electronic address: michal.masternak@ucf.edu.
authors.forename: Michal M
authors.initials: MM
authors.lastname: Masternak
mesh_terms: D017667:Adipocytes / Q000378:metabolism* / Q000473:pathology; D050156:Adipogenesis; D000273:Adipose Tissue / Q000378:metabolism* / Q000473:pathology / Q000503:physiopathology; D050154:Adiposity; D000367:Age Factors; D000375:Aging / Q000378:metabolism* / Q000473:pathology; D000818:Animals; D004734:Energy Metabolism; D006801:Humans; D007249:Inflammation / Q000378:metabolism / Q000473:pathology; D018836:Inflammation Mediators / Q000378:metabolism; D008214:Lymphocytes / Q000378:metabolism / Q000473:pathology; D008264:Macrophages / Q000378:metabolism / Q000473:pathology; D035683:MicroRNAs / Q000235:genetics / Q000378:metabolism; D009765:Obesity / Q000378:metabolism* / Q000473:pathology / Q000503:physiopathology; D010641:Phenotype; D055153:Stem Cell Niche
chemical_list: D018836:Inflammation Mediators; D035683:MicroRNAs