Neuritin is known to play an important role in promoting neuronal survival, differentiation, function, and repair. The expression of Neuritin can be induced in response to neural activity and neurotrophins. NRN1 promotes neurite outgrowth and arborization, especially branching of neuritic processes in primary hippocampal and cortical cells, suggesting its role in promoting neuritogenesis. Overexpression of NRN1 may be associated with astrocytoma progression. Recombinant human Neuritin is a covalently disulfide-linked homodimer, consisting of two 9.8 kDa polypeptide monomers.