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Updated: Jun 6, 2026

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Published on: May 24, 2024
Interleukin-6: a potential target for post-thrombotic syndrome.
Brandon M Wojcik1, Shirley K Wrobleski, Angela E Hawley
1Section of Vascular Surgery, Department of Surgery, University of Michigan, Ann Arbor, MI, USA.
Neutralizing interleukin-6 (IL-6) in a mouse model of deep vein thrombosis (DVT) reduced vein wall fibrosis and collagen deposition. This suggests IL-6 is a potential therapeutic target for preventing post-thrombotic syndrome (PTS).
Area of Science:
- Vascular Biology
- Immunology
- Fibrosis Research
Background:
- Deep vein thrombosis (DVT) and post-thrombotic syndrome (PTS) are significant health issues.
- PTS involves vein wall fibrosis, and elevated Interleukin-6 (IL-6) is linked to both DVT risk and fibrosis.
- The role of IL-6 in vein wall fibrosis progression following DVT requires further elucidation.
Purpose of the Study:
- To investigate the role of IL-6 in the development of vein wall fibrosis using a mouse model of DVT.
- To determine if neutralizing IL-6 can mitigate fibrotic changes associated with DVT.
Main Methods:
- A DVT mouse model was established using inferior vena cava ligation.
- Mice were treated with anti-IL-6 monoclonal antibody or control immunoglobulin G.
- Evaluated thrombus weight, gene/protein expression (IL-6, CCL2), inflammatory cell infiltration, and vein wall morphometrics at various time points.
Main Results:
- Anti-IL-6 treatment led to smaller thrombus weights and reduced CCL2 expression/protein at day 2.
- Monocyte recruitment into the vein wall was impaired from days 2 to 6 in the anti-IL-6 group.
- Intimal thickness was reduced by 44% and collagen deposition by 30% at day 14 with anti-IL-6 treatment.
Conclusions:
- Neutralizing IL-6 during venous thrombogenesis effectively reduced CCL2 production and monocyte recruitment.
- IL-6 neutralization significantly decreased vein wall intimal thickness and fibrosis.
- These findings indicate IL-6 as a potential therapeutic target for preventing fibrotic complications of PTS.
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