The interplay between systemic inflammatory factors and endometriosis: A bidirectional mendelian randomization study

Area of Science:

• Genetics
• Immunology
• Reproductive Medicine

Background:

• Endometriosis is a complex condition with unclear etiology.
• Systemic inflammation is implicated in endometriosis pathogenesis.
• Understanding the causal relationship between inflammation and endometriosis is crucial for developing targeted therapies.

Purpose of the Study:

• To investigate the causal interplay between 41 systemic inflammatory factors and endometriosis using genetic data.
• To identify potential upstream inflammatory factors initiating endometriosis.
• To explore whether endometriosis influences systemic inflammatory factor concentrations.

Main Methods:

• Bidirectional Mendelian randomization study utilizing genetic instrumental variables.
• Analysis of the effect of systemic inflammatory factors on endometriosis phenotypes.
• Investigation of the effect of endometriosis on systemic inflammatory factor concentrations.

Main Results:

• Identified 20 causal relationships involving 18 systemic inflammatory factors.
• Eleven specific inflammatory factors (e.g., Monocyte chemotactic protein-1, Interleukin-4) were found to be potential upstream causes of endometriosis.
• Endometriosis suggested an increase in Eotaxin and a decrease in growth-regulated oncogene-alpha, but no reverse causality was observed.

Conclusions:

• Several systemic inflammatory factors may initiate endometriosis development.
• Other inflammatory factors are likely involved downstream during disease progression.
• These findings provide insights into the inflammatory mechanisms underlying endometriosis.