Wnt family member 1 (WNT1)

Wnt family member 1 (WNT1) is a highly conserved, secreted glycoprotein that acts as a ligand in the canonical Wnt/β-catenin signaling pathway[1][5][3]. It plays a critical role during embryogenesis, particularly in neural development and patterning of the midbrain and hindbrain, through the regulation of cell fate, proliferation, and migration[1]. In adults, WNT1 continues to maintain tissue integrity via stem cell control. Aberrant activation or overexpression of WNT1 contributes to tumorigenesis in various cancers (e.g., non-small cell lung cancer), and loss-of-function mutations cause inherited bone diseases such as osteogenesis imperfecta and early-onset osteoporosis[1]. WNT1 binds to Frizzled and LRP5/6 membrane receptors, triggering downstream stabilization and nuclear translocation of β-catenin, which initiates gene transcription[5]. The pathway is a key target for therapeutic intervention, though inhibition can carry substantial safety concerns due to the pathway's fundamental role in normal cell physiology.

Other names

Proto-oncogene Wnt-1INT1Proto-oncogene Int-1 homologBMND16OI15wingless-type MMTV integration site family member 1wingless (Drosophila)Wg

Inhibition of Wnt ligand secretion (e.g., PORCN inhibitors prevent Wnt palmitoleation and secretion); Blockade of Wnt–Frizzled binding (e.g., Frizzled antibodies); Prevention of β-catenin stabilization/accumulation