PMID- 11000490 OWN - NLM STAT- MEDLINE DCOM- 20010201 LR - 20190826 IS - 0169-328X (Print) IS - 0169-328X (Linking) VI - 81 IP - 1-2 DP - 2000 Sep 30 TI - Capsaicin effects on brain-derived neurotrophic factor in rat dorsal root ganglia and spinal cord. PG - 181-6 AB - The effects of capsaicin systemically administered in adult rats, with the major focus on the expression of brain-derived neurotropic factor (BDNF) and its mRNA in the dorsal root ganglion (DRG) and spinal cord, has been investigated by means of immunohistochemistry and reverse transcriptase-polymerase chain reactions. The percentage of BDNF-immunoreactive neurons in the L5 DRG was found to increase significantly 1 day after capsaicin injection. Subsequently, it decreased slowly returning to near normal levels 1 week later. Four weeks post-injection, a significant reduction to below normal levels was observed. The temporal pattern of BDNF mRNA expression in the DRG was similar to BDNF-immunoreactivity. In the spinal cord, 1 and 3 days post-injection, no changes in the expression of the BDNF-immunoreactive axonal fibers was noted. However, the expression had decreased significantly after 1 and 4 weeks. The mechanism by which capsaicin induces changes in expression of BDNF in DRG neurons and the functional significance of the rapid increase in BDNF levels in the DRG is discussed briefly. FAU - Ha, S O AU - Ha SO AD - Department of Anatomy, School of Medicine, Kyungpook National University, 2-101 Dongin Dong, Taegu 700-422, South Korea. FAU - Yoo, H J AU - Yoo HJ FAU - Park, S Y AU - Park SY FAU - Hong, H S AU - Hong HS FAU - Kim, D S AU - Kim DS FAU - Cho, H J AU - Cho HJ LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - Brain Res Mol Brain Res JT - Brain research. Molecular brain research JID - 8908640 RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (RNA, Messenger) RN - S07O44R1ZM (Capsaicin) SB - IM MH - Animals MH - Brain-Derived Neurotrophic Factor/*genetics MH - Capsaicin/*pharmacology MH - Ganglia, Spinal/cytology/drug effects/*metabolism MH - Gene Expression Regulation/drug effects MH - Male MH - Neurons/cytology/*metabolism MH - Protein Biosynthesis/drug effects MH - RNA, Messenger/genetics MH - Rats MH - Rats, Sprague-Dawley MH - Spinal Cord/cytology/drug effects/*metabolism MH - Transcription, Genetic/drug effects EDAT- 2000/09/23 11:00 MHDA- 2001/02/28 10:01 CRDT- 2000/09/23 11:00 PHST- 2000/09/23 11:00 [pubmed] PHST- 2001/02/28 10:01 [medline] PHST- 2000/09/23 11:00 [entrez] AID - S0169328X00001443 [pii] AID - 10.1016/s0169-328x(00)00144-3 [doi] PST - ppublish SO - Brain Res Mol Brain Res. 2000 Sep 30;81(1-2):181-6. doi: 10.1016/s0169-328x(00)00144-3.