Interplay between Endometriosis and Pregnancy in a Mouse Model

Area of Science:

• Reproductive biology
• Immunology
• Gynecological pathology

Background:

• Endometriosis is a condition affecting women of reproductive age.
• Infertility is a common complication of endometriosis.
• The role of cytokines in endometriosis-associated infertility requires further investigation.

Purpose of the Study:

• To investigate the impact of endometriosis on fertility in a mouse model.
• To assess the levels of Interleukin-2 (IL-2) and Interferon-gamma (IFN-γ) in peritoneal fluid.
• To evaluate the effect of pregnancy on the growth, apoptosis, and cell proliferation of endometriotic lesions.

Main Methods:

• Surgical induction of endometriosis in C57BL/6 mice.
• Mating of mice and assessment of pregnancy outcomes (implantation sites, fetal weight).
• Analysis of endometriotic lesions for size, apoptosis (TUNEL), cell proliferation (PCNA), and cytokine levels (ELISA).

Main Results:

• Reduced pregnancy rates were observed in mice with endometriosis.
• IFN-γ levels were elevated in endometriosis mice, particularly during pregnancy.
• IL-2 levels were increased in non-pregnant endometriosis mice.
• Endometriotic lesions increased in size during pregnancy, with increased apoptosis and necrosis but decreased cell proliferation.

Conclusions:

• Endometriosis is associated with reduced fertility in this mouse model.
• Elevated IL-2 in peritoneal fluid may contribute to endometriosis-related infertility.
• Pregnancy influences endometriotic lesions, promoting tissue remodeling and potentially mitigating disease progression.