Interleukin-1 β-induced Id2 gene expression is mediated by Egr-1 in vascular smooth muscle cells

Objective Id2 (inhibitor of DNA-binding 2), a member of the helix–loop–helix family of transcription regulators, plays important roles in cell proliferation and differentiation. Recent reports have documented that Id2 is up-regulated during vascular lesion formation and overexpression of Id2 promotes vascular smooth muscle cell (VSMC) proliferation. However, the transcriptional regulation of Id2 gene expression in VSMC remains unexplored.