Key result
Kv1.3 knockdown attenuates macrophage inflammation via the ERK/NF-κB pathway.
Why the study?
The role and mechanism of the Kv1.3 channel in ox-LDL-induced macrophage inflammation in atherosclerosis were not fully understood.
The Kv1.3 channel promotes ox-LDL-induced macrophage inflammation through the ERK/NF-κB pathway, highlighting a potential mechanism in atherosclerosis progression.
Answers are grounded in this paper and cite their sources.
May support Kv1.3 inhibition to curb macrophage inflammation; hypothesis-generating for atherosclerosis and needs in vivo validation before clinical consideration.
Macrophage inflammatory response is crucial for the initiation and progression of atherosclerosis. The voltage-gated potassium channel Kv1.3 plays an important role in the modulation of macrophage function. The aim of this study was to investigate the effect and possible mechanism of Kv1.3 on inflammation in oxidized low-density lipoprotein (ox-LDL)-induced RAW264.7 macrophages. Treatment with Kv1.3-siRNA attenuated the expression of IL-6 and TNF-α and reduced the phosphorylation of ERK1/2 and NF-κB in ox-LDL-induced macrophages. In contrast, overexpression of Kv1.3 with Lv-Kv1.3 promoted the expression of IL-6 and TNF-α, and increased ERK1/2 and NF-κB phosphorylation in macrophages. PD-98059, a specific inhibitor of ERK, reversed the expression of IL-6 and TNF-α in ox-LDL-treated macrophages. Kv1.3-siRNA did not inhibit inflammation any further when cells were treated with PD-98059. This suggests that ERK acts as a downstream regulator of the Kv1.3 channel. In conclusion, Kv1.3 may be an indispensable membrane protein in ox-LDL-induced RAW264.7 macrophage inflammation in atherosclerosis through the ERK/NF-κB pathway.
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Zhang et al. (2022) studied Atherosclerosis (macrophage inflammation). Kv1.3-siRNA and Lv-Kv1.3 was evaluated on Expression of IL-6 and TNF-α, and phosphorylation of ERK1/2 and NF-κB. Kv1.3 knockdown attenuated IL-6 and TNF-α expression and reduced ERK1/2 and NF-κB phosphorylation in ox-LDL-induced macrophages, suggesting Kv1.3 mediates inflammation via the ERK/NF-κB pathway.
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