05Mar 2023
An Inhibitory Function of TRPA1 Channels in TGF-β1–driven Fibroblast-to-Myofibroblast Differentiation

An Inhibitory Function of TRPA1 Channels in TGF-β1–driven Fibroblast-to-Myofibroblast Differentiation

TRPA1 is a type of calcium-permeable cation channel that is activated by exposure to certain chemicals, including allyl isothiocyanate (AITC). It has been proposed that activation of TRPA1 may have a protective effect against the development of cardiac fibrosis. However, the role of TRPA1 in fibroblast-to-myofibroblast differentiation and the development of pulmonary fibrosis has not been well understood. Recent research has shown that TRPA1 expression and function in human lung fibroblasts (HLFs) are significantly reduced after exposure to transforming growth factor-β1 (TGF-β1), which is associated with fibrosis. Additionally, the downregulation of TRPA1 expression in HLFs leads to an increase in the expression of genes encoding fibrosis markers. Activation of TRPA1 by AITC in HLFs inhibits TGF-β receptor signaling by augmenting ERK1/2 and SMAD2 linker phosphorylation. These findings suggest that TRPA1 channels have an inhibitory function in TGF-β1-driven fibroblast-to-myofibroblast differentiation and may be protective in the development of pulmonary fibrosis.

  • #pulmonology

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