The IL-1β/STAT1 Axis inhibits STAT3 function via Sequestration of the transcriptional activator GLIS2, leading to...

Area of Science:

• Vascular Biology and Thrombosis
• Molecular Signaling Pathways
• Inflammatory Response Mechanisms

Background:

• Surgery-induced endothelial dysfunction contributes significantly to thrombus formation.
• The role of Signal Transducer and Activator of Transcription (STAT) family signaling in post-surgical vascular responses remains unclear.
• Identifying key molecular pathways is crucial for developing strategies to prevent post-surgical thrombosis.

Purpose of the Study:

• To elucidate the signaling mechanisms underlying vascular dysfunction after surgical trauma.
• To identify potential molecular targets for predicting or preventing post-surgical thrombosis.
• To investigate the role of STAT signaling in mediating the inflammatory response to surgical trauma.

Main Methods:

• Endothelial cells were co-cultured with serum from post-surgical trauma models.
• Bioinformatics analysis was employed to identify associated signaling pathways.
• Inflammatory mediator levels, STAT activation, and protein interactions were assessed in mouse models.

Main Results:

• Bioinformatics analysis revealed links between surgical trauma and pathways involving thrombosis, interleukins, cytokines, and STAT signaling.
• Elevated inflammatory mediators were detected in post-surgical trauma serum.
• Interleukin-6 (IL-6) activated STAT3, promoting endothelial proliferation, while Interleukin-1 beta (IL-1β) activated STAT1, which inhibited STAT3.
• Gli-similar 2 (GLIS2) was identified as a STAT3 coactivator, but STAT1 inhibited the GLIS2-STAT3 interaction, suppressing endothelial proliferation.

Conclusions:

• Interleukin-1 beta (IL-1β)-induced STAT1 activation disrupts the GLIS2-STAT3 interaction, reducing STAT3 transcriptional activity.
• This disruption leads to endothelial dysfunction and contributes to thrombosis after surgical trauma.
• Targeting the IL-1β/STAT1/GLIS2/STAT3 axis presents a novel therapeutic strategy for preventing post-surgical endothelial dysfunction and thrombosis.