Is endometriosis associated with systemic subclinical inflammation?

Area of Science:

• Reproductive Immunology
• Gynecological Pathology

Background:

• Endometriosis is characterized by pelvic inflammation with altered immune cell function, notably increased activated macrophages.
• These macrophages release local factors, leading to elevated cytokines and other molecules in peritoneal fluid.
• Similar factors are also found elevated in the peripheral blood of endometriosis patients.

Purpose of the Study:

• To review data on changes in peripheral blood factors associated with endometriosis.
• To explore the potential of these peripheral blood factors as diagnostic biomarkers.

Main Methods:

• Review of existing literature on immune cell profiles and cytokine levels in endometriosis patients.
• Analysis of changes in peripheral blood markers including C-reactive protein (CRP), serum amyloid A (SAA), tumor necrosis factor-alpha (TNF-alpha), monocyte chemoattractant protein-1 (MCP-1), interleukin-6 (IL-6), interleukin-8 (IL-8), and chemokine (C-C motif) receptor 1 (CCR1).
• Examination of peripheral blood monocyte (CD44+, CD14+) and lymphocyte (CD3+, CD20+) populations.

Main Results:

• Significant increases in CD44+ and CD14+ monocytes in peripheral blood.
• Modest but significant decreases in CD3+ T lymphocytes and CD20+ B lymphocytes.
• Elevated levels of various cytokines and inflammatory factors (CRP, SAA, TNF-alpha, MCP-1, IL-6, IL-8, CCR1) in peripheral blood.

Conclusions:

• Endometriosis exhibits systemic subclinical manifestations alongside its local pelvic pathology.
• Peripheral blood biomarkers show significant alterations, indicating potential for non-invasive diagnosis.
• Further research into these systemic markers could lead to improved diagnostic strategies for endometriosis.