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Ciliary neurotrophic factor （CNTF） is one of the most studied neurotrophic factors for neuroprotection of the retina. It is a neuroprotective cytokine initially identified in chick embryo. It has been evaluated for the treatment of neurodegenerative diseases. CNTF also acts on non-neuronal cells such as oligodendrocytes, astrocytes, adipocytes and skeletal muscles cells.