title: A novel therapy for acute hepatitis utilizing dehydroepiandrosterone in the murine model of hepatitis.
abstract: Dehydroepiandrosterone (DHEA), one of the major androgens secreted by the adrenal cortex, has been shown to have potential immunoreguratory properties. In this study, we examined the effect of DHEA in a mouse model of hepatitis. Mice were treated with DHEA and injected with concanavalin A (Con A) or lipopolysaccharide (LPS)/D-galactosamine (GalN). Cytokine expression was measured by quantitative RT-PCR and ELISA. Apoptosis was detected by the TUNEL method and by DNA fragmentation analysis. In the DHEA-treated mice, the serum levels of ALT and expression of inflammatory mediators were significantly decreased. The number of apoptotic cells was also much lower than that observed in control, untreated mouse liver tissue. There were fewer tumor necrosis factor-alpha (TNF-alpha)-induced apoptotic cells in H4IIE hepatoma cells treated with DHEA than in non-treated cells. DHEA decreased the expression levels of mRNA transcripts encoding TNF-alpha and iNOS. These results suggest that DHEA can reduce T-cell-mediated injury in the liver as manifest by inhibition of the expression of several inflammatory mediators and hepatocyte apoptosis. DHEA should, thus, be considered as a novel candidate for the therapy of liver injury.
authors.affiliation: The Third Department of Internal Medicine, Yokohama City University School of Medicine, 3-9 Fuku-ura, Kanazawa, Yokohama, Japan. yoneda@med.yokohama-cu.ac.jp
authors.forename: Masato
authors.initials: M
authors.lastname: Yoneda
authors.forename: Koichiro
authors.initials: K
authors.lastname: Wada
authors.forename: Kazufumi
authors.initials: K
authors.lastname: Katayama
authors.forename: Noriko
authors.initials: N
authors.lastname: Nakajima
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Iwasaki
authors.forename: Emi
authors.initials: E
authors.lastname: Osawa
authors.forename: Koji
authors.initials: K
authors.lastname: Mukasa
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Yamada
authors.forename: Richard S
authors.initials: RS
authors.lastname: Blumberg
authors.forename: Hisahiko
authors.initials: H
authors.lastname: Sekihara
authors.forename: Atsushi
authors.initials: A
authors.lastname: Nakajima
mesh_terms: D000818:Animals; D017209:Apoptosis; D056486:Chemical and Drug Induced Liver Injury / Q000378:metabolism / Q000473:pathology / Q000517:prevention & control*; D003208:Concanavalin A; D053938:DNA Fragmentation / Q000187:drug effects; D003687:Dehydroepiandrosterone / Q000627:therapeutic use*; D004195:Disease Models, Animal; D022781:Hepatocytes / Q000166:cytology / Q000187:drug effects; D008070:Lipopolysaccharides; D051379:Mice; D008807:Mice, Inbred BALB C
chemical_list: D008070:Lipopolysaccharides; D003208:Concanavalin A; D003687:Dehydroepiandrosterone