Macrophages near neuronal cell bodies can promote regeneration in an otherwise inhibitory environment. Now Yin et al. identify oncomodulin as a factor secreted from macrophages that promotes extensive regeneration of lesioned optic nerve axons when applied together with elevated cyclic AMP (cAMP) and mannose.
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Filbin, M. How inflammation promotes regeneration. Nat Neurosci 9, 715–717 (2006). https://doi.org/10.1038/nn0606-715
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DOI: https://doi.org/10.1038/nn0606-715
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