Abstract

BACKGROUND: The study of stress-induced phosphoprotein 1 in the pathogenesis of adenomyosis is not only of theoretical interest, but this protein may be also considered as a potential biomarker of the disease. AIM: The aim of this study was to evaluate stress-induced phosphoprotein 1 expression in the endometrium and heterotopic foci in women with isolated adenomyosis and in combination with benign hyperproliferative diseases of the reproductive organs. MATERIALS AND METHODS: This study enrolled 66 women aged 21 to 47 years (34.9 ± 6.7 years), including 49 patients with adenomyosis and 17 women in the control group. The main group was divided into subgroups depending on the concomitant hyperproliferative disease such as isolated adenomyosis (n = 36), adenomyosis combined with uterine fibroids (n = 8), and adenomyosis combined with endometriosis (n = 5). The patients underwent endometrial biopsy and multifocal myometrial biopsy. Histological and immunohistochemical studies were performed to assess stress-induced phosphoprotein 1 expression in the glandular and stromal components of the endometrium and ectopic endometrial tissue within the uterine myometrium. RESULTS: We found increased stress-induced phosphoprotein 1 expression in the adenomyosis lesion compared to that in the myometrium of the control group, regardless of the phase of the menstrual cycle (p 0.001). When studying stress-induced phosphoprotein 1 expression in the endometrium of the main group in the proliferative phase of the menstrual cycle, an increase was found, but the differences were not significant. Stress-induced phosphoprotein 1 expression in the secretory phase of the menstrual cycle was higher in the glandular component of the endometrium of patients with adenomyosis compared to the levels in women in the control group (p 0.05). CONCLUSIONS: The increased expression of stress-induced phosphoprotein 1 in the glandular component of the adenomyosis lesion indicates a potential role of the protein in the pathogenesis of the disease. However, further research is needed to determine its practical significance.

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