药物研究
FAN Yue;WU Xiaoguang;MIAO Hong;CHENG Jianjun;SHANG Yazhen
Objective To study the effects of flavonoids from Scutellaria Barbata on β-amyloid protein 25-35 (Aβ25-35)induced injury of rats’ astrocytes. Methods Rats’ astrocytes of passage 3 were divided into blank control group, model control group, small, middle and large doses (17.5, 35.0 and 70.0 μg.mL-1, respectively) of Scutellaria Barbata flavonoids groups.After treatment by 17.5, 35.0 and 70.0 μg.mL-1 of Scutellaria Barbata flavonoids for 24 h, the cells of model control, small, middle and large dose groups were added with Aβ25-35 (final concentration: 100 μmol.L-1) and cultured for another 24 h.MTT colorimetric method was used to measure cell viability, spectrophotometry to determine LDH content in cultured medium, immunohistochemistry to detect cellular LDH, ELISA to detect IL-1β and IL-6 levels in culture medium. Results As compared with blank control group, cell survival rate of model control group was significantly decreased by 49.94% (P<0.01).As compared with model control group, cell survival rate was increased by 12.50% (P<0.05), 16.67% (P<0.01) and 2.08% (P>0.05) in small, medium and large dose groups, respectively.As compared with blank control group, LDH of supernatant fluid was significantly decreased by 36.65% (P<0.01).As compared with model control group, LDH level was increased by 11.35% (P>0.05), 26.40% (P<0.01) and 32.44% (P<0.01) in the small, medium and large dose groups.As compared with blank control group, positive area proportion of LDH protein in astrocytes was decreased by 24.92% (P<0.05).As compared with model control group, positive area proportion of LDH protein was increased by 31.20% and 53.60% in medium and large dose groups, respectively.As compared with blank control group, IL-1β and IL-6 were significantly decreased in the model control group by 23.60% and 15.47% (P<0.01), respectively.As compared with model control group, IL-1β and IL-6 were increased in small, medium and large dose groups, and IL-1β was increased by 5.74% (P>0.05), 24.82% (P<0.01) and 6.86% (P>0.05), respectively; IL-6 was increased by 11.30% (P<0.05), 17.39% (P<0.01) and 3.87% (P>0.05), respectively. Conclusion Scutellaria Barbata falvonoids exert protective effect on Aβ25-35induced astrocyte injury.Scutellaria Barbata flavonoids might treat Alzheimer’s disease through influencing astrocytes.