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通过比较饲喂首乌的老年大鼠、对照大鼠和青年大鼠外周淋巴细胞ＤＮＡ的复制后合成（ＰＲＤＳ）的水平，探讨首乌在提高老年机体ＤＮＡ修复能力方面的作用。结果显示：中等剂量的首乌乙醇浸膏明显提高了大鼠外周淋巴细胞ＤＮＡ的损伤修复能力（Ｐ＜０．０５）。
By comparing the level of post-replication synthesis (PRDS) of DNA in peripheral lymphocytes of old rats, control rats and young rats fed with Shouwu, the effect of Shouwu on improving the DNA repair capacity of old people was explored. The results showed that medium-dose ethanol extract of Shouwu significantly increased DNA damage repair ability of rat peripheral lymphocytes (P<0.05).