A study on apoptosis of fermented fnonotus obliquus on hepatocellular carcinoma HepG2 cells / 医学研究生学报

ABSTRACT

Objective A variety of secondary metabolites can be obtained after the fermentation of medicinal fungi.The con-tent of these metabolites is much higher than that of cultivated medicinal fungi. We aimed to preliminarily study on the apoptosis of fer-mented Inonotus obliquus(FIO) on hepatocellular carcinoma HepG-2 cells. Methods The experiment was divided into 3 groupsthe control group(The same volume of drug-free medium),the UIO group(200 mg/L) and the FIO group(200 mg/L). The contents of polysaccharides,terpenoids and polyphenols in unfermented Inonotus Obliquus (UIO) and FIO were determined by sulfuric acid phenol method,Folin-Ciocalteu method and colorimetric method. Effects of Fermented Inonotus obliquus on apoptosis of HepG-2 Cells were measured by MTT Method and Flow Cytometry. Results The contents of polysaccharides,terpenoids and polyphenols were sig-nificantly increased in FIO group [(10.140±0.849)mg/mL,(1.774±0.001)mg/mL, (9.979±0.022)mg/mL] compared with thatin UIO group [(7.161±0.305)mg/mL,(1.358±0.004)mg/mL,(6.314±0.237)mg/mL](P<0.01). Both UIO and FIO group induced apoptosis of HepG-2 cells according to Annexin V/PI double staining. Compared with the control group(4.3%),the apoptosis rate in-creased in UIO and FIO group (23.14%,27.37%) (P<0.05). In addition, the apoptosis rate was higher in FIO group than that in UIO group (P<0.05). Compared with the control group, the ratio of G0/G1phase cells was significantly increased and the ratio of S phase and G2/M phase was significantly decreased in UIO and FIO group (P<0.01). G0/G1phase cell ratio differences were statistically signif-icant compared with the UIO group (P<0.05) Conclusion FIO can better induce the apoptosis of HepG-2 cells than UIO.