title: Colostrinin delays the onset of proliferative senescence of diploid murine fibroblast cells.
abstract: Colostrinin (CLN), a uniform mixture of low-molecular weight, proline-rich polypeptides, induces neurite outgrowth of pheochromocytoma cells and inhibits beta amyloid-induced apoptosis. Moreover, its administration to patients with Alzheimer's disease resulted in improved cognitive functions. In this study, we investigated the impact of CLN on the lifespan of murine diploid fibroblast cells (MDF), an in vitro model for cellular aging. Here, we show that CLN significantly decelerates the senescence of cultured MDF and increases their population doubling levels. This action of CLN is associated with a decrease in the intracellular levels of reactive oxygen species, which may be due to senescence-associated mitochondrial dysfunction. These data suggest that CLN may delay the development of cellular aging at the level of the organism. Thus, CLN may be used in the prevention and/or therapy of diseases associated with aging processes.
authors.affiliation: Department of Microbiology and Immunology, University of Texas Medical Branch, 3.170 Medical Research Building, 301 University Blvd, Galveston, TX 77555, USA.
authors.forename: Attila
authors.initials: A
authors.lastname: Bacsi
authors.forename: Mitchell
authors.initials: M
authors.lastname: Woodberry
authors.forename: Marian L
authors.initials: ML
authors.lastname: Kruzel
authors.forename: Istvan
authors.initials: I
authors.lastname: Boldogh
mesh_terms: D000818:Animals; D002455:Cell Division / Q000187:drug effects; D002478:Cells, Cultured; D016922:Cellular Senescence / Q000187:drug effects*; D020405:Dermis / Q000166:cytology; D004171:Diploidy; D005347:Fibroblasts / Q000166:cytology* / Q000187:drug effects* / Q000378:metabolism; D036341:Intercellular Signaling Peptides and Proteins; D051379:Mice; D008815:Mice, Inbred Strains; D018384:Oxidative Stress / Q000187:drug effects; D010455:Peptides / Q000494:pharmacology*; D017382:Reactive Oxygen Species / Q000378:metabolism
chemical_list: D036341:Intercellular Signaling Peptides and Proteins; D010455:Peptides; D017382:Reactive Oxygen Species; C105874:colostrinine