子宫实验和E-SCREEN实验在检测雌激素活性中的相关性

目的　以 1 7β 雌二醇 (1 7β E2 )和四种植物提取物为受试物 ,研究子宫实验和E SCREEN实验在检测雌激素活性中的相关性。方法　断乳雌性小鼠 (1 0～ 1 2g)按体重分为 6组 ,分别给予小茴香、山豆根、补骨脂和川牛膝提取物 (1 0g kgBW ,ig)、1 7β E2 (0 5mg kgBW ,sc)和蒸馏水 (ig) ,持续 9天后处死动物剥离子宫称重。分别在人类乳腺癌MCF 7细胞培养液中加入四种植物提取物 (终浓度 1 0mg L)和 1 7β E2 (终浓度0 3μmol L) ,计算各组细胞在 1 2 0h内的平均群体倍增时间 ,分析小鼠子宫重量与细胞群体倍增时间的相关性。结果　 4种植物提取物均可使小鼠子宫重量增加 (P <0 0 5或P <0 0 1 ) ,细胞群体倍增时间缩短。子宫重量与群体倍增时间呈显著负相关 (r=- 0 96 7,P <0 0 1 )。结论　子宫实验和E SCREEN实验结果在检测雌激素活性物质时具有一致性

Correlation comparison of uterotrophic assay and E-SCREEN assay for estrogenic activities

OBJECTIVE: To evaluate the correlation of uterotrophic assay in immature mice and E-SCREEN assay for estrogenic activities using 17beta-estradiol (17beta-E2) and four botanical extracts (Fructus Foeniculi, Fructus Psoraleae, Radix Cyathulae and Radix Sophorae Tonkinensis). METHODS: Weanling female Kunming mice weighed 10 - 12 g were given botanical extracts (10 g/kg BW, i.g) and 17beta-E2 (0.5 mg/kg BW, s.c), respectively, for 9 days. Uterine and ovary weights of mice were measured after killed. Human breast cancer MCF-7 cells were cultured and treated with botanical extracts (final concentration: 10 mg/L) and 17beta-E2 (final concentration: 0.3 micromol/L) for 120 h, respectively. The doubling time of cell growth was calculated and analyzed its correlation with average uterine weights obtained from uterotrophic assay. Results Four botanical extracts, as well as 17beta-E2, increased uterine weights of mice significantly (P < 0.05 or P < 0.01) and shortened the doubling time of cell growth. And uterine weights were inversely correlated with the doubling time of cell growth (r = -0.967, P < 0.01). CONCLUSION: The result of uterotrophic assay in immature mice was consistent with that of E-SCREEN assay when evaluating estrogenic activities.