Vascular smooth muscle cell surface heparin-binding proteins (VSMC-HBP)

Vascular smooth muscle cell surface heparin-binding proteins (VSMC-HBPs) refer to a heterogeneous group of membrane-associated proteins and proteoglycans that mediate the biological effects of heparin and heparan sulfate on the vascular wall. This group includes well-characterized heparan sulfate proteoglycans (HSPGs) such as syndecan-4 and glypican-1, as well as specific, high-affinity "heparin receptors" like the 78-80 kDa protein identified in vascular smooth muscle cell membranes (San Antonio et al., 1993; Patton et al., 1995). These proteins are essential for the antiproliferative and anti-migratory effects of heparin, which are critical for maintaining vascular homeostasis and preventing pathological remodeling. Upon binding heparin, these surface proteins trigger intracellular signaling cascades, including the activation of protein kinase G (PKG) and the induction of mitogen-activated protein kinase phosphatase-1 (MKP-1), which ultimately suppresses growth factor-induced mitogenesis (Gilotti et al., 2014). Consequently, VSMC-HBPs are significant therapeutic targets for pharmacological interventions aimed at treating cardiovascular diseases characterized by excessive smooth muscle cell proliferation, such as atherosclerosis and restenosis following angioplasty.

Other names

Heparin receptorVSMC heparin-binding proteinsCell surface heparan sulfate proteoglycans80 kDa heparin-binding protein78 kDa heparin-binding protein35 kDa heparin-binding protein

Binding to cell surface heparin-binding proteins to inhibit growth factor-induced proliferation and migration of vascular smooth muscle cells, primarily through the activation of protein kinase G (PKG) and the induction of mitogen-activated protein kinase phosphatase-1 (MKP-1).