PMID- 24174309 OWN - NLM STAT- MEDLINE DCOM- 20140724 LR - 20211025 IS - 1095-8355 (Electronic) IS - 1065-6995 (Linking) VI - 38 IP - 1 DP - 2014 Jan TI - Proteinase-activated receptor 2 modulates corticotropin releasing hormone-induced brain-derived neurotrophic factor release from microglial cells. PG - 92-6 LID - 10.1002/cbin.10185 [doi] AB - Brain-derived neurotrophic factor (BDNF) plays a critical role in the pathogenesis of neuropathic pain, but its regulation of BDNF release is not fully understood. To further understand the regulation of BDNF release, the microglial cell line, C8-D1A (microglia, in short), were cultured as a model. The levels of BDNF were determined by enzyme-linked immunoassay. Apoptotic microglia were assessed by flow cytometry. The protease-activated receptor 2 (PAR2) was activated by tryptase. Exposure to corticotripin releasing hormone (CRH) induced BDNF release from microglia. Apoptosis was evident in microglia after activation by CRH. Tryptase-induced PAR2 activation reduced the frequency of apoptosis of microglia, but enhanced the BDNF levels in the culture medium, which was partially blocked by PAR2 antagonists. We conclude that PAR2 agonists can promote the BDNF release from microglia; the PAR2 antagonists may be a potential therapeutic target to attenuate the BDNF-related neuropathic pain. CI - (c) 2013 International Federation for Cell Biology. FAU - Fan, Yongzhi AU - Fan Y AD - Department of Anesthesiology and Department of Pain Medicine, The Central Hospital of Wuhan, 26 Shengli St., Jiangan District, Wuhan, 430014, China. FAU - Chen, Jingli AU - Chen J FAU - Ye, Jun AU - Ye J FAU - Yan, Hong AU - Yan H FAU - Cai, Yi AU - Cai Y LA - eng PT - Journal Article DEP - 20131030 PL - England TA - Cell Biol Int JT - Cell biology international JID - 9307129 RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (Receptor, PAR-2) RN - 0 (Tlr4 protein, mouse) RN - 0 (Toll-Like Receptor 4) RN - 9015-71-8 (Corticotropin-Releasing Hormone) RN - EC 3.4.21.59 (Tryptases) SB - IM MH - Animals MH - Apoptosis/*drug effects MH - Brain-Derived Neurotrophic Factor/*metabolism MH - Cell Line MH - Corticotropin-Releasing Hormone/*pharmacology MH - Mice MH - Microglia/cytology/metabolism MH - Receptor, PAR-2/agonists/antagonists & inhibitors/*metabolism MH - Toll-Like Receptor 4/metabolism MH - Tryptases/metabolism OTO - NOTNLM OT - apoptosis OT - brain-derived neurotropin factor OT - corticotropin releasing hormone OT - microglia OT - protease-activated receptor 2 EDAT- 2013/11/01 06:00 MHDA- 2014/07/25 06:00 CRDT- 2013/11/01 06:00 PHST- 2013/06/22 00:00 [received] PHST- 2013/08/11 00:00 [accepted] PHST- 2013/11/01 06:00 [entrez] PHST- 2013/11/01 06:00 [pubmed] PHST- 2014/07/25 06:00 [medline] AID - 10.1002/cbin.10185 [doi] PST - ppublish SO - Cell Biol Int. 2014 Jan;38(1):92-6. doi: 10.1002/cbin.10185. Epub 2013 Oct 30.