★ We examine changes in cytokines in the menopausal stages classified in detail. ★ IL-8 in postmenopause is higher than those in pre- and peri-menopause. ★ MCP-1 in late menopausal stage is higher than that in early menopausal stage. ★ MCP-1 shows a positive correlation with FSH during the menopausal transition. ★ Patterns of changes in IL-8 and MCP-1 during the menopausal stage are different.Objective
The aim of the present study was to clarify the changes in circulating cytokines and chemokines in women during the menopausal transition by using a detailed classification.Materials and methods
A total of 554 women were recruited for this study from the outpatient clinic of the Department of Obstetrics and Gynecology, Tokushima University Hospital. We divided the women into seven stages by menstrual regularity and FSH level: mid-reproductive stage, late reproductive stage, early menopausal transition, late menopausal transition, very early postmenopause, early postmenopause and late postmenopause. We measured serum concentrations of nine cytokines (IL-1β, IL-5, IL-6, IL-7, IL-8, IL-10, TNF-α, MIP-1β and MCP-1).Results
Serum IL-8 concentrations in postmenopausal women were significantly (p = 0.001) higher than those in women in the mid- or late reproductive stage and women in early or late menopausal transition. Serum MCP-1 levels in women in late menopausal transition and postmenopause were significantly (p < 0.001) higher than those in women in the mid- or late reproductive stage and women in early menopausal transition. MCP-1 level showed a significant positive correlation (r = 0.215, p < 0.01) with FSH level in women in menopausal transition.Conclusion
By using a detailed classification of menopausal transition, patterns of changes in IL-8 and MCP-1 levels during the menopausal transition were found to be different. IL-8 level showed a high level after menopause, while MCP-1 level showed a high level in menopausal transition. MCP-1 may be sensitive to hormonal change and may be involved in the development of estrogen deficiency diseases.