RESUMO
The mechanism underlying the improvement in hepatic function by liver hydrolysate (LH) after ethanol-induced hepatic injury is unclear. Therefore, we investigated the effects of LH administration on chronic ethanol-induced hepatic injury in normal rats and the mechanism underlying the improvement of its symptoms by LH. LH attenuated liver damage and reduced oxidative stress after chronic ethanol-induced hepatic injury in normal rats. LH treatment reduced hepatic injury biomarkers of plasma aspartate aminotransferase (AST) and alanine aminotransferase (ALT). LH treatment also decreased levels of 8-hydroxy-deoxyguanosine (8-OHdG) as oxidative stress marker. LH may prove beneficial to prevent the liver damage of chronic ethanol, at least in part, by alleviating oxidative stress.
Assuntos
Doença Hepática Induzida por Substâncias e Drogas/tratamento farmacológico , Doença Hepática Induzida por Substâncias e Drogas/metabolismo , Etanol/farmacologia , Fígado/metabolismo , Alanina Transaminase/sangue , Alanina Transaminase/metabolismo , Animais , Aspartato Aminotransferases/sangue , Aspartato Aminotransferases/metabolismo , Doença Hepática Induzida por Substâncias e Drogas/sangue , Feminino , Masculino , Malondialdeído/sangue , Malondialdeído/metabolismo , Estresse Oxidativo/efeitos dos fármacos , Ratos , Ratos Wistar , Superóxido Dismutase/sangue , Superóxido Dismutase/metabolismoRESUMO
The maintenance of stem cells often requires the support of feeder cells. Primary mouse embryonic fibroblasts (MEFs) have traditionally been used as feeder cells, and although these MEF-derived feeder cells have exhibited a reasonable performance, they require repeated cell isolation, since MEFs cannot expand indefinitely. To overcome this limitation, immortalized cells, such as STO cells, have been used. However, one major disadvantage is that previously reported immortalized cells can only support stem cell cultures for a relatively short period, typically 4 to 7â¯days. In this study, we found that our newly established rat-derived fibroblasts immortalized by the expression of mutant cyclin-dependent kinase 4, cyclin D, and telomerase reverse transcriptase, can function as feeder cells for relatively long cell culture periods of approximately 14â¯days. The rat-derived immortalized cells developed in this study should be a useful source of feeder cells to support stem cell research.
Assuntos
Ciclina D/biossíntese , Quinase 4 Dependente de Ciclina/biossíntese , Células Alimentadoras/metabolismo , Fibroblastos/metabolismo , Mutação , Células-Tronco/metabolismo , Telomerase/biossíntese , Animais , Linhagem Celular Transformada , Técnicas de Cocultura , Ciclina D/genética , Quinase 4 Dependente de Ciclina/genética , Células Alimentadoras/citologia , Fibroblastos/citologia , Camundongos , Ratos , Células-Tronco/citologia , Telomerase/genéticaRESUMO
We studied the effects of fermented barley extract P (FBEP) in stroke-prone spontaneously hypertensive rats (SHRSP). Male 10-week-old SHRSP were divided into three groups that were fed: an AIN-93M diet (control), a low dose of FBEP (4 g/kg; FBEP1), and a high dose of FBEP (20 g/kg; FBEP2) for three weeks. Hypertension was significantly improved by the use of FBEP supplementation. The FBEP diet improved plasma triglyceride, insulin sensitivity, enhanced plasma catalase, and superoxide dismutase activities, and decreased plasma 8-hydroxy-2'-deoxyguanosine levels. In addition, the FBEP diet upregulated hepatic antioxidative genes and modulated Nrf2 protein levels in the liver. Furthermore, a single oral dose of FBEP (2 g/kg body weight) was able to lower blood pressure in SHRSP. In conclusion, our data suggest that increased expression of hepatic antioxidative genes and modulation of Nrf2 may play a role in the regulation of metabolic diseases in SHRSP consuming a FBEP diet.
