title: Effect of apelin on mitosis, apoptosis and DNA repair enzyme OGG 1/2 expression in intestinal cell lines IEC-6 and Caco-2.
abstract: Apelin is a regulatory peptide, identified as an endogenous ligand of the Apelin receptor (APJ). Both the apelin and the APJ were detected in brain, lung, heart, mammary gland, kidney, placenta, adipose tissues and the gastrointestinal tract. Apelin is considered an important regulatory gut peptide with a potential physiological role in gastrointestinal cytoprotection, regulation of food intake and drinking behaviour. The aim of the present study was to assess the effect of the apelin on mitosis, apoptosis and the expression of DNA repair enzyme (OGG 1/2), and APJ receptor in intestinal cell lines: rat crypt (IEC-6) and human enterocyte model (Caco-2). The cell cultures were incubated with the apelin-12 (10-8 M) for 4, 6, 12, 24 and 48 h and the apoptosis (caspase 3), mitosis (Ki-67) and DNA repair enzyme (OGG1/2) markers were studied by Real-Time qRT-PCR and immunofluorescent methods. The results of Real-Time qRT-PCR and immunocytochemical analysis showed that the levels of mRNAs were inversely related to the expression level of corresponding proteins. Immunofluorescent studies revealed inhibitory effect of apelin-12 on apoptosis, mitosis and the expression of OGG1/2 in the intestinal crypt cell line IEC-6. However, in the enterocyte model Caco-2 cells apelin stimulated apoptosis and mitosis, and reduced OGG1/2 expression. These findings suggest that apelin may be involved in the control of epithelial cell turnover in the gastrointestinal tract.
authors.affiliation: The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, Jablonna, Poland. antuszewicz@op.pl.
authors.forename: Hanna
authors.initials: H
authors.lastname: Antushevich
authors.forename: Agata
authors.initials: A
authors.lastname: Krawczynska
authors.forename: Malgorzata
authors.initials: M
authors.lastname: Kapica
authors.forename: Andrzej Przemyslaw
authors.initials: AP
authors.lastname: Herman
authors.forename: Romuald
authors.initials: R
authors.lastname: Zabielski
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000187:drug effects*; D015415:Biomarkers / Q000378:metabolism; D018938:Caco-2 Cells; D053148:Caspase 3 / Q000235:genetics / Q000378:metabolism; D002460:Cell Line; D045647:DNA Glycosylases / Q000235:genetics* / Q000378:metabolism; D004260:DNA Repair / Q000187:drug effects / Q000235:genetics; D045643:DNA Repair Enzymes / Q000235:genetics / Q000378:metabolism; D015971:Gene Expression Regulation, Enzymologic / Q000187:drug effects; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins / Q000494:pharmacology*; D007413:Intestinal Mucosa / Q000187:drug effects* / Q000378:metabolism; D019394:Ki-67 Antigen / Q000235:genetics / Q000378:metabolism; D008938:Mitosis / Q000187:drug effects; D051381:Rats
chemical_list: D015415:Biomarkers; D036341:Intercellular Signaling Peptides and Proteins; D019394:Ki-67 Antigen; C495200:apelin-12 peptide; D045647:DNA Glycosylases; C479058:oxoguanine glycosylase 1, human; D053148:Caspase 3; D045643:DNA Repair Enzymes