Abstract
Objective:To investigate the effect of perimenopausal hormone replace-ment therapy(HRT)on cytokine patterns in a perimenopausal mouse model established by ovarian castration.Methods:The mice were divided into natural menopause group,ovariectomy group and HRT group,with 15 mice in each group,and the estrous cycle,e-strous frequency and menopausal time of the mice were determined by vaginal cytology,and the estrous cycle,estrous frequency and menopausal time were compared among the three groups.The serum levels of estradiol(E2)and progesterone(P4)in each group were detected by double-antibody sandwich ELISA,and the levels of interferon gamma(IFN-γ),interleukin-2(IL-2),IL-4 and IL-10 in the spleen γ tissues of mice were de-tected by ELISA.Results:The time of menopause(53.07±3.99)d in the HRT group was between that of the natural menopause group(80.80±3.26)d and that of the ovariectomy group(16.27±4.35)d,with a statistically significant difference in the two-by-two com-parison of the three groups(P<0.05).The levels of serum E2(694.4±128.3)ng/L and P4(14.2±6.0)ng/L in the HRT therapy group are between those of the ovariectomy group and the natural menopause group,with statistically significant differences between the groups(P<0.05).The levels of IL-2(30.9±5.3)pg/ml,IL-4(9.4±1.6)pg/ml,IL-10(19.7±3.1)pg/ml,IFN-γ(22.0±3.7)pg/ml in the HRT group were all between those of natural menopause group and ovariectomy group.The Th1/Th2 ratio in the ovariectomy group was 7.55±1.57,higher than that in the natural menopause group(1.53±0.48)and HRT group(2.38±0.44),with statistically significant differences(P<0.05).Conclusion:Menopausal HRT can partially correct the imbalance of Th1/Th2 cytokines,which is able to provide an experimental basis for the regulation of menopause-related immune imbalance by HRT.
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