Wnt family ligands (Wnt-1, Wnt-3, Wnt-4, Wnt-5a) (Wnt)

Wnt ligands are a family of secreted glycoproteins that serve as critical mediators of intercellular communication, regulating cell fate, proliferation, and patterning during embryonic development and adult tissue maintenance (Nusse & Clevers, 2017). These ligands, including Wnt-1, Wnt-3, Wnt-4, and Wnt-5a, bind to Frizzled receptors and LRP5/6 co-receptors to initiate the canonical beta-catenin pathway or various non-canonical pathways (Zhan et al., 2017). Aberrant activation of Wnt signaling is frequently implicated in oncogenesis, particularly in colorectal, breast, and lung cancers, where ligand overexpression promotes tumor stemness and epithelial-mesenchymal transition. Therapeutic interventions targeting Wnt ligands include decoy receptors like ipafricept, which sequester multiple Wnt isoforms to prevent receptor activation (Jimeno et al., 2017). Another approach involves Porcupine inhibitors, such as LGK974, which block the essential lipid modification required for the secretion of all Wnt ligands (Liu et al., 2021). Despite their therapeutic potential, targeting these ligands is complicated by their essential roles in the maintenance of the intestinal epithelium and bone homeostasis, leading to significant safety concerns such as gastrointestinal distress and bone loss (Kahn, 2014).

Other names

Wingless-type MMTV integration site familyWnt proteinsWnt-1Wnt-3Wnt-4Wnt-5aWnt ligands

Inhibition of Wnt signaling through ligand sequestration by decoy receptors or blockade of ligand secretion via Porcupine inhibition.