Influence of endogenous ciliary neurotrophic factor on neural differentiation of adult rat hippocampal progenitors

doi:10.3969/j.issn.1673-5374.2013.04.002

Abstract

Abstract:

Ciliary neurotrophic factor is the only known neurotrophic factor that can promote differentiation of hippocampal neural progenitor cells to glial cells and neurons in adult rats. This process is similar to spontaneous differentiation. Therefore, ciliary neurotrophic factor may be involved in spontaneous differentiation of neural stem cells. To verify this hypothesis, the present study isolated neural progenitor cells from adult male rats and cultured them in vitro. Results showed that when neural progenitor cells were cultured in the absence of mitogen fibroblast growth factor-2 or epidermal growth factor, they underwent spontaneous differentiation into neurons and glial cells. Western blot and immunocytochemical staining showed that exogenous ciliary neurotrophic factor strongly induced adult hippocampal progenitor cells to differentiate into neurons and glial cells. Moreover, passage 4 adult hippocampal progenitor cells expressed high levels of endogenous ciliary neurotrophic factor, and a neutralizing antibody against ciliary neurotrophic factor prevented the spontaneous neuronal and glial differentiation of adult hippocampal progenitor cells. These results suggest that the spontaneous differentiation of adult hippocampal progenitor cells is mediated partially by endogenous ciliary neurotrophic factor.

Key words: neural regeneration, stem cells, spontaneous differentiation, neural progenitor cells, endogenous neurotrophic factors, ciliary neurotrophic factor, regeneration, grants-supported paper, photographs-containing paper, neuroregeneration

Jun Ding, Zhili He, Juan Ruan, Ying Liu, Chengxin Gong, Shenggang Sun, Honghui Chen. Influence of endogenous ciliary neurotrophic factor on neural differentiation of adult rat hippocampal progenitors[J]. Neural Regeneration Research, 2013, 8(4): 301-312.

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