PMID- 16951573 OWN - NLM STAT- MEDLINE DCOM- 20061018 LR - 20071115 IS - 0959-4965 (Print) IS - 0959-4965 (Linking) VI - 17 IP - 12 DP - 2006 Aug 21 TI - Differential brain-derived neurotrophic factor and transforming growth factor-beta expression in the rat cochlea following deafness. PG - 1297-301 AB - Brain derived neurotrophic factor (BDNF) and transforming growth factor-beta (TGFbeta) subtypes have demonstrated their importance in cochlear functions. The aim of this study was to determine gene and protein expression patterns of BDNF, TGFbeta1/2 and their main receptors trkB and TGFbetaR1/R2 in the auditory nerve and inferior colliculus of normal hearing and deafened rats by reverse-transcriptase polymerase chain reaction and immunohistochemistry. Deafening was performed by cochlear injection of neomycin (10%). Significant gene expression changes were not found in the inferior colliculus after deafness; however, in the auditory nerve, BDNF, TGFbeta1 and TGFbetaR1 mRNA in particular were upregulated. Additionally, BDNF protein and the cytokines were found to be expressed in the auditory nerve after hair cell loss. These data indicate the importance of BDNF and TGFbeta1 as endogenous survival factors. FAU - Wissel, Kirsten AU - Wissel K AD - Department of Otolaryngology, Medical University of Hannover, Hannover, Germany. FAU - Wefstaedt, Patrick AU - Wefstaedt P FAU - Miller, Josef M AU - Miller JM FAU - Lenarz, Thomas AU - Lenarz T FAU - Stover, Timo AU - Stover T LA - eng GR - DC03820/DC/NIDCD NIH HHS/United States PT - Comparative Study PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PL - England TA - Neuroreport JT - Neuroreport JID - 9100935 RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (RNA, Messenger) RN - 0 (Receptors, Transforming Growth Factor beta) RN - 0 (Transforming Growth Factor beta) SB - IM MH - Animals MH - Blotting, Northern/methods MH - Brain-Derived Neurotrophic Factor/genetics/*metabolism MH - Cochlea/*metabolism MH - Deafness/metabolism/*pathology MH - Disease Models, Animal MH - Gene Expression Regulation/*physiology MH - Immunohistochemistry/methods MH - Inferior Colliculi/metabolism MH - Male MH - RNA, Messenger/metabolism MH - Rats MH - Rats, Inbred Lew MH - Receptors, Transforming Growth Factor beta/genetics/metabolism MH - Reverse Transcriptase Polymerase Chain Reaction/methods MH - Transforming Growth Factor beta/genetics/*metabolism MH - Vestibulocochlear Nerve/metabolism EDAT- 2006/09/05 09:00 MHDA- 2006/10/19 09:00 CRDT- 2006/09/05 09:00 PHST- 2006/09/05 09:00 [pubmed] PHST- 2006/10/19 09:00 [medline] PHST- 2006/09/05 09:00 [entrez] AID - 00001756-200608210-00014 [pii] AID - 10.1097/01.wnr.0000233088.92839.23 [doi] PST - ppublish SO - Neuroreport. 2006 Aug 21;17(12):1297-301. doi: 10.1097/01.wnr.0000233088.92839.23.