Glial cell line-derived neurotrophic factor is expressed by inflammatory cells in the sciatic nerves of Lewis rats with experimental autoimmune neuritis

Journal of the Peripheral Nervous System : JPNS
Meejung AhnTaekyun Shin

Abstract

Neurotrophic factors, including glial cell line-derived neurotrophic factor (GDNF), have been known to play a role in neuroprotection in the injured peripheral nervous system (PNS). To evaluate the involvement of GDNF in experimental autoimmune neuritis (EAN) pathogenesis, the expression of GDNF in rat sciatic nerves with EAN was studied. Western blot analysis showed that the level of GDNF protein significantly increased 1.8-fold at the paralytic stage of EAN at day 12 post-immunization (PI) (p < 0.01), and its level further increased approximately 2.5-fold at day 21 PI (p < 0.001) in the sciatic nerves of EAN-affected rats compared with those of control rats, and then declined thereafter at day 28 PI. Immunohistochemical analysis showed that axons and Schwann cells constitutively contained GDNF in normal controls. In sciatic nerves with EAN at day 12 PI, GDNF was immunostained in infiltrating inflammatory cells including macrophages and T cells. Collectively, we postulate that GDNF plays a regulatory role in EAN paralysis. A paradoxical role of inflammatory cells to ameliorate PNS inflammation remains to be further studied in EAN, an animal model of human demyelinating disease.

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Citations

Mar 26, 2013·Neurobiology of Disease·Elke YdensSophie Janssens
Apr 3, 2012·Experimental Neurology·Damien P Kuffler
Feb 13, 2020·Journal of Clinical Medicine·Marcelo Duarte AzevedoLiliane Tenenbaum

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