MEN-ENDO: Menstrual Stem Cells in Endometriosis

Francisco Algaba Chueca

Status: Enrolling

Conditions: Endometriosis

Treatments: Other: Menstrual blood-derived stem cells collection and in vitro characterization

Study type: Observational

Funder types: Other

Identifiers

NCT07578480

MEN-ENDO CEIm 308/2025

Details and patient eligibility

About

Endometriosis is a chronic inflammatory condition characterized by the presence of endometrium-like tissue outside the uterine cavity. It is estimated to affect approximately 10% of women of reproductive age and it is associated with chronic pelvic pain and infertility, among other symptoms.

Endometriosis involves complex changes in the body's cells and immune response. For this reason, the goal of this observational study is to characterize the functional, molecular, and immunological alterations in menstrual blood-derived stem cells (MenSCs) and differentiated decidual stromal cells in women with endometriosis; to validate these findings in endometrial tissue and endometriomas; and to establish their correlation with clinical parameters, with the aim of identifying key pathogenic mechanisms and potential therapeutic targets.

The main questions it aims to answer are:

• Are there functional and molecular changes in MenSCs from patients with endometriosis compared to healthy volunteers?
• Are there any variations in the immune properties of MenSCs throughout the menstrual bleeding period in patients with endometriosis compared to healthy volunteers?
• Are these changes also present in endometrial tissue and endometrioma samples?
• Can these changes be correlated with clinical parameters in patients with endometriosis?
• Can MenSCs serve as a potential therapeutic target for endometriosis?

Some participants will be asked to provide menstrual blood on a single day, while others will provide samples during the first five days of menstruation. Additionally, all participants will answer questionnaires about their diet, physical activity, stress, and pain levels. Therefore, the study does not involve the evaluation of a specific intervention on the participants.

The results will enable the identification of key altered mechanisms and potential therapeutic targets, thereby contributing to the development of more effective strategies for the diagnosis and treatment of the disease.

Enrollment: 40 estimated patients

Sex: Female

Ages: 18 to 45 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• 18-45 years.
• Endometriosis group: Women with clinical and/or ecographical diagnostic of endometriosis.
• Control group: Women with the endometriosis diagnosis.

Exclusion criteria

• <18 years or >45 years.
• Pregnancy or lactation.
• Diagnosis of prior chronic pelvic inflammatory or autoimmune disease.
• History of active gynecological cancer.
• Positive for human immunodeficiency virus (HIV) or human papillomavirus (HPV).
• Hormonal therapy use in the previous 3 months.
• Use of immunosuppressants or corticosteroids in the previous 3 months.
• Systemic antibiotics use in the previous 3 months.
• Insufficient menstrual flow to allow the MenSCs isolation.

Trial design

40 participants in 1 patient group

Endometriosis

Treatment:

Other: Menstrual blood-derived stem cells collection and in vitro characterization