Netrin-5 (NTN5)

Netrin-5 (NTN5) is a member of the netrin family, a group of secreted laminin-related proteins that function primarily as guidance molecules in the developing and adult mammalian nervous system[1][2][3][4][5]. Netrin-5 is highly expressed in regions of ongoing neurogenesis such as the subventricular and subgranular zones, olfactory bulb, and rostral migratory stream in the brain, and is found in neuroblasts and transit amplifying cells but not in mature astrocytes[1]. The protein contains distinct domains homologous to netrin-1, including laminin-type EGF motifs and the C345C domain, but lacks the N-terminal laminin VI domain[1][3]. Its main described functions are controlling axon guidance, regulating the development of dendrites and cell migration (especially during embryonic neural tube development), and preventing inappropriate migration of motor neuron cell bodies[1][2][4][5]. Despite these established roles in neural development, its specific receptors and interacting partners remain incompletely characterized; binding with DCC and Unc5 family receptors has been hypothesized, similar to other netrins, but is not experimentally confirmed[1]. Clinically, genetic variations in NTN5 may be involved in the risk of late-onset Alzheimer's disease and potentially other neurodegenerative conditions, although direct links remain to be established[1][2]. Due to its fundamental role in cell migration, netrin-5 could play a role in carcinogenesis, but there is currently no direct evidence of tumor association[2]. No interacting drugs, biomarkers, or safety concerns have been reported to date.

Other names

Netrin-5NTN5netrin 5netrin-1-like proteinNET5 protein