HOXC4 promotes proliferation of endometriotic stromal cells via the SLIT2-ROBO1 axis

Area of Science:

• Reproductive biology
• Molecular medicine
• Cellular mechanisms of disease

Background:

• Current endometriosis treatments, primarily hormone therapies, exhibit limited efficacy and significant side effects.
• A lack of targeted therapies stems from the inability to differentiate between endometriotic and normal endometrial tissues.
• Understanding the molecular drivers of endometriotic stromal cell proliferation is crucial for developing effective treatments.

Purpose of the Study:

• To identify key molecular mechanisms driving the proliferation of endometrial-like stromal cells in endometriosis.
• To investigate the role of differentially expressed genes in endometriotic lesions compared to normal endometrial tissues.
• To explore potential novel therapeutic targets for endometriosis.

Main Methods:

• Transcriptome sequencing was employed to compare gene expression profiles of stromal cells from endometriosis and endometrial tissues.
• Functional studies were conducted to assess the role of identified genes in cell proliferation.
• Mechanistic investigations explored gene regulatory pathways and protein interactions.

Main Results:

• Homeobox C4 (HOXC4) was found to be preferentially expressed in endometriotic lesions.
• HOXC4 demonstrated indispensable roles in promoting the proliferation of endometriosis-derived stromal cells, but not those from normal endometrium.
• HOXC4 was shown to upregulate Slit Guidance Ligand 2 (SLIT2) expression, subsequently activating p38 MAPK signaling via the ROBO1 receptor.

Conclusions:

• HOXC4 is a critical regulator of stromal cell proliferation in endometriosis.
• The SLIT2-ROBO1 signaling axis, influenced by HOXC4, plays a significant role in endometriosis development.
• HOXC4 and the SLIT2-ROBO1 pathway represent promising therapeutic targets for endometriosis.