Wingless-type MMTV integration site family ligands (Wnt) (Wnt)

Wingless-type MMTV integration site (Wnt) family ligands are a group of 19 secreted glycoproteins that serve as critical mediators of intercellular communication in humans [1]. These ligands initiate signaling by binding to Frizzled receptors and LRP5/6 co-receptors, thereby regulating fundamental processes such as embryonic development, stem cell maintenance, and adult tissue homeostasis [1, 4]. Aberrant activation of Wnt signaling, often driven by ligand overexpression or mutations in regulatory components, is a primary driver in various malignancies, most notably colorectal cancer [4]. Conversely, deficient Wnt signaling is associated with bone density disorders like osteoporosis and neurodegenerative conditions [1]. Therapeutic intervention strategies primarily focus on inhibiting the secretion of these ligands via Porcupine inhibitors or sequestering them using decoy receptors known as Wnt-traps [2, 3]. Despite their therapeutic potential, targeting Wnt ligands is complicated by significant safety concerns, particularly gastrointestinal toxicity and bone loss, due to the essential role of Wnt signaling in maintaining the intestinal epithelium and bone remodeling [4].

Other names

Wnt family ligandsWnt proteinsWingless-related proteinsWnt signaling ligands

Inhibition of Porcupine-mediated O-palmitoylation to prevent Wnt secretion; Sequestration of Wnt ligands using decoy receptors (Wnt-traps); Mimicry of specific Wnt ligands to restore signaling (Wnt mimetics).