Amelioration of female menopausal syndrome by intravenous administration of autologous menstrual blood-derived stem cells.

INTRODUCTION

Menopausal syndrome is characterized by a wide range of physical and psychological symptoms in women aged 40s-50s as a result of hormonal fluctuations and age-related decline. Various treatments have been used to manage the symptoms, including hormone replacement therapy, but no effective causal therapies have yet been identified. Regenerative medicine has gained considerable attention as a promising approach to age-related problems, and mesenchymal stem cell therapies have been extensively studied. Recently, menstrual blood has emerged as a novel cell source of stem cells, called menstrual blood-derived stem cells (MenSCs), due to its non-invasive, regular and consistent collection from women. In this study, we have investigated the therapeutic potential of intravenous administration of autologous MenSCs on female menopausal syndromes.

METHODS

Menstrual blood was collected from 15 patients aged 30s-60s with ovarian dysfunction using a menstrual cup, and MenSCs were isolated, cultured and expanded. Patients received either 3 × 10 cells or 1 × 10 cells intravenously 1 to 5 times at intervals of more than 1 month. Patient-reported symptoms were assessed using the Simplified Menopausal Index at pre-treatment and after 1, 3, 6, and 12 months, and safety assessments were performed. Serum estradiol and follicle-stimulating hormone levels were also measured by immunoassay.

RESULTS

Almost all patients who received MenSCs experienced a sharp reduction in menopausal symptoms, including vasomotor, neuropsychiatric, and motor symptoms, one month after the first administration, and these symptoms remained low for 6 months. The Simplified Menopausal Index score was significantly reduced after treatment. The reducing potency of 1 × 10 MenSCs was greater than that of 3 × 10 MenSCs. Patients who received a higher number of MenSCs showed an increasing trend in estradiol levels and a decreasing trend in follicle-stimulating hormone levels. When MenSCs were administered to postmenopausal patients, this trend was more pronounced. Overall, no apparent serious adverse events were observed during these treatments.

CONCLUSIONS

The present results suggest that the administration of MenSCs improved menopausal symptoms and regulated hormonal balance without any serious adverse events. This is the first report on the promising therapeutic potential of cell-based therapy using autologous MenSCs for female menopausal syndrome.