Syndecan-2 (SDC2)

Syndecan-2 is a type I transmembrane heparan sulfate proteoglycan encoded by the SDC2 gene in humans. It is part of the syndecan family of cell-surface proteins that are critical for interactions between cells and the extracellular matrix, acting as a receptor and coreceptor for various ligands including extracellular matrix proteins and growth factors. Syndecan-2 regulates key biological processes such as cell proliferation, migration, angiogenesis, cytoskeletal organization, and maintenance of stem cell quiescence. Its dysregulated expression is implicated in tumor invasiveness, especially in lung adenocarcinoma, and it enhances vascular endothelial growth factor (VEGF) signaling by facilitating the formation of a ternary complex with VEGFA and VEGFR2. Syndecan-2 is also involved in the regulation of hematopoietic stem cell repopulating capacity and quiescence by modulating TGFβ signaling. While not currently a direct target of approved clinical drugs, its roles in cancer and stem cell biology make it a subject of therapeutic interest, especially for RNA-based or heparan sulfate mimetic strategies in preclinical studies[1][2][3][4].

Other names

Syndecan 2SDC2Heparan sulfate proteoglycan syndecan-2

Modulation of syndecan-2 leads to altered cell proliferation and invasiveness (notably in lung adenocarcinoma) through effects on MMP9 expression via syntenin-1 and NF-κB pathways[2]. Acts as a coreceptor to modulate signaling of growth factors (e.g., VEGFA/VEGFR2 and TGFβ), impacting angiogenesis and stem cell maintenance[3][4]. Heparan sulfate mimetics may promote mobilization of hematopoietic stem cells by disrupting extracellular matrix interactions[3].