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Updated: Dec 15, 2025
Activation and Measurement of NLRP3 Inflammasome Activity Using IL-1β in Human Monocyte-derived Dendritic Cells
Published on: May 22, 2014
ClC-2 inhibition prevents macrophage foam cell formation by suppressing Nlrp3 inflammasome activation
Wenyuan Ding1, Jiamin Li1, Lili Wang1
1Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University , Jinan, China.
Abstract:
Macrophage foam cell formation and inflammation are a pathological hallmark of atherosclerosis. ClC-2 has been implicated in various pathological processes, including inflammation and lipid metabolic disorder. However, the functional role of ClC-2 in macrophage foam cell formation and inflammation is unclear. Here, we found that ClC-2 was dominantly expressed in macrophages of atherosclerotic plaque and increased in atherogenesis. Knockdown of ClC-2 inhibited ox-LDL -induced lipid uptake and deposition in macrophages. The increase in CD36 expression and the decrease in ABCA1 expression induced by ox-LDL were alleviated by ClC-2 downregulation. Further, ClC-2 lacking limited the ox-LDL-induced secretion of inflammatory cytokines and chemokine, and suppressed Nlrp3 inflammasome activation. Restoration of Nlrp3 expression reversed the effect of ClC-2 downregulation on macrophage lipid accumulation and inflammation. Collectively, our study demonstrates that ClC-2 knockdown ameliorates ox-LDL-induced macrophage foam cell formation and inflammation by inhibiting Nlrp3 inflammasome activation.
Insights
Targeting ClC-2 (Chloride channel 2) reduces macrophage foam cell formation and inflammation in atherosclerosis. Downregulating ClC-2 inhibits lipid accumulation and inflammatory pathways, offering a potential therapeutic strategy.
Area of Science:
- Cardiovascular Biology
- Immunology
- Cell Biology
Background:
- Macrophage foam cell formation and inflammation are key features of atherosclerosis.
- ClC-2's role in these processes, particularly in macrophages, remains largely undefined.
Purpose of the Study:
- To investigate the functional role of ClC-2 in macrophage foam cell formation and inflammation.
- To elucidate the underlying molecular mechanisms involving ClC-2 in atherogenesis.
Main Methods:
- Assessed ClC-2 expression in atherosclerotic plaques.
- Utilized ClC-2 knockdown in macrophages exposed to oxidized low-density lipoprotein (ox-LDL).
- Measured lipid uptake/deposition, CD36/ABCA1 expression, inflammatory cytokine secretion, and Nlrp3 inflammasome activation.
Main Results:
- ClC-2 is upregulated in macrophages during atherogenesis.
- ClC-2 knockdown inhibited ox-LDL-induced lipid accumulation by modulating CD36 and ABCA1 expression.
- ClC-2 deficiency suppressed ox-LDL-induced inflammation and Nlrp3 inflammasome activation.
- Nlrp3 restoration reversed the protective effects of ClC-2 downregulation.
Conclusions:
- ClC-2 plays a significant role in promoting macrophage foam cell formation and inflammation.
- ClC-2 knockdown ameliorates these processes by inhibiting Nlrp3 inflammasome activation.
- Targeting ClC-2 represents a potential therapeutic avenue for atherosclerosis.
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