Basement membrane-specific heparan sulfate proteoglycan core protein (Perlecan) (HSPG2)

Perlecan, encoded by the HSPG2 gene, is a massive, multidomain heparan sulfate proteoglycan (HSPG) that serves as a primary structural component of basement membranes and the extracellular matrix [1]. Its biological activity is heavily dependent on its three heparan sulfate (HS) chains, which act as a reservoir for various growth factors, including fibroblast growth factor 2 (FGF-2) and vascular endothelial growth factor (VEGF), thereby facilitating their presentation to high-affinity receptors [2]. In oncology, perlecan is often upregulated in the tumor microenvironment, where it promotes angiogenesis and provides a scaffold for tumor cell migration [3]. Conversely, its C-terminal fragment, endorepellin, has been identified as a potent anti-angiogenic factor that signals through α2β1 integrin [3]. Therapeutic strategies targeting perlecan typically utilize heparin-mimetics like Muparfostat (PI-88) to displace growth factors from the HS chains or monoclonal antibodies to block its pro-tumorigenic interactions [4]. Mutations in the core protein are associated with severe developmental disorders such as Schwartz-Jampel syndrome, highlighting its critical role in musculoskeletal development [1]. [1] UniProt Consortium (P98160); [2] Whitelock et al., IUBMB Life (2008); [3] Iozzo et al., Matrix Biology (2009); [4] Basappa et al., Cancer Letters (2016).

Other names

PerlecanHSPG2PLCSJASJSSJS1PRCANHeparan sulfate proteoglycan 2

Inhibition of growth factor binding (e.g., FGF-2, VEGF) to heparan sulfate chains, competitive inhibition of heparanase, and modulation of integrin-mediated signaling.