Downregulation ofAcat1by miR-21 may participate in liver fibrosis upon chronic DDT exposure
TOXICOLOGY MECHANISMS AND METHODS
Authors: Chanyshev, Mikhail D.; Yarushkin, Andrey A.; Koldysheva, Elena, V; Lushnikova, Elena L.; Gulyaeva, Lyudmila F.
Abstract
The main objective of the present study was to investigate the toxic effect of long-term exposure to DDT (2,2-dichlorodiphenyl-1,1,1-trichloroethane) on rat livers. Female Wistar rats were treated with once-weekly i.p. doses of DDT (10 and 50 mg/kg) for 12 weeks. Histological analysis revealed significant changes in the liver structure, especially at a dose of 50 mg/kg, which consistent with a fibrotic state. Long-term DDT exposure increased micro RNA-21 (miR-21) level and decreased Acetyl-CoA acetyltransferase 1 (Acat1) mRNA and protein levels in a dose-dependent manner. A dual-luciferase reporter assay confirmed the regulation of the ratAcat13 '-UTR by miR-21. Previous studies have described the involvement of ACAT1 in fibrogenesis; thus, regulation of theAcat1gene by miR-21 may play a role in DDT exposure-mediated liver fibrosis.
ACAT1 is not associated with Alzheimer's disease in two independent family-based samples
MOLECULAR PSYCHIATRY
Authors: Bertram, L; Hsiao, M; Mullin, K; Parkinson, M; Menon, R; Moscarillo, TJ; Blacker, D; Tanzi, RE
Abstract