RESUMEN
Methylophiopogonanone A (MO-A), a homoisoflavonoid extracted from Ophiopogon japonicus, has been shown to attenuate myocardial apoptosis and improve cerebral ischemia/reperfusion injury. However, the hypolipidemic effects remain unknown. This study was performed to investigate a potential hypolipidemic effect of MO-A in hyperlipidemia rats, as well as its underlying mechanism of action. A rat model of hyperlipidemia was induced by a high-fat diet (HFD). Animals were randomly divided into three groups (n=8/group): normal control group (NC), HFD group, and HFD+MO-A (10 mg·kg-1·d-1) treatment group. The effects of MO-A on serum lipids, body weight, activity of lipoprotein metabolism enzyme, and gene expression of lipid metabolism were evaluated in HFD-induced rats. In HFD-induced rats, pretreatment with MO-A decreased the body weight gain and reduced serum and hepatic lipid levels. In addition, pretreatment with MO-A improved the activities of lipoprotein lipase and hepatic lipase in serum and liver, down-regulated mRNA expression of acetyl CoA carboxylase and sterol regulatory element-binding protein 1c, and up-regulated mRNA expression of low-density lipoprotein receptor and peroxisome proliferator-activated receptor α in the liver. Our results indicated that MO-A showed strong ability to ameliorate the hyperlipidemia in HFD-induced rats. MO-A might be a potential candidate for prevention of overweight and dyslipidemia induced by HFD.
Asunto(s)
Animales , Masculino , Ratas , Ophiopogon/química , Benzodioxoles/farmacología , Metabolismo de los Lípidos , Dieta Alta en Grasa , Hiperlipidemias/prevención & control , Isoflavonas/farmacología , Western Blotting , Ratas Sprague-Dawley , Modelos Animales de Enfermedad , Benzodioxoles/aislamiento & purificación , Heces/química , Reacción en Cadena en Tiempo Real de la Polimerasa , Hiperlipidemias/metabolismo , Isoflavonas/aislamiento & purificación , Lípidos/análisisRESUMEN
Objective To increase the anti-tumor effect of 5-ALA-mediated photodynamic therapy, PDT was performed at 635nm followed by an additional irradiation at 670nm, and the effectiveness was studied. Methods PDT was performed at single irradiation (635nm or 670nm), and symphysial irradiation (635nm+670nm), and its effectiveness was studied using PpIXsolutions, tumor cells (9L and HeLa), andHeLa tumor-bearing mice. Results When a Pp IX solution was irradiated at 635 nm or 670nm, singlet oxygen counts were almost similar. Symphysial irradiation -mediated singlet oxygen generation was higher in 9L cells than HeLa cells and it did not produce an additional PDT effect in HeLa tumors. Conclusion It was suggested as the low uptake of 5-ALA in HeLa cells, and the symphysial irradiation can't increase the anti-tumor effects in 5-ALA-mediated PDT. Further study is necessary to obtain the irradiation method for the efficient application of PDT.