PMID- 16240240 OWN - NLM STAT- MEDLINE DCOM- 20060316 LR - 20230706 IS - 1525-3961 (Print) IS - 1438-7573 (Electronic) IS - 1438-7573 (Linking) VI - 6 IP - 4 DP - 2005 Dec TI - Immortalized mouse inner ear cell lines demonstrate a role for chemokines in promoting the growth of developing statoacoustic ganglion neurons. PG - 355-67 AB - The target-derived factors necessary for promoting initial outgrowth from the statoacoustic ganglion (SAG) to the inner ear have not been fully characterized. In the present study, conditioned medium from embryonic Immortomouse inner ear cell lines that maintain many characteristics of developing inner ear sensory epithelia were screened for neurite-promoting activity. Conditioned medium found to be positive for promoting SAG neurite outgrowth and neuronal survival was then tested for the presence of chemokines, molecules that have not previously been investigated for promoting SAG outgrowth. One candidate molecule, monocyte chemotactic protein 1 (MCP-1), was detected in the conditioned medium and subsequently localized to mouse hair cells by immunocytochemistry. In vitro studies demonstrated that function-blocking MCP-1 antibodies decreased the amount of SAG neurite outgrowth induced by the conditioned medium and that subsequent addition of MCP-1 protein was able to promote outgrowth when added to the antibody-treated conditioned medium. The use of the Immortomouse cell lines proved valuable in identifying this candidate cofactor that promotes outgrowth of early-stage SAG nerve fibers and is expressed in embryonic hair cells. FAU - Bianchi, Lynne M AU - Bianchi LM AD - Neuroscience Department, Oberlin College, Oberlin, OH 44074, USA. lynne.bianchi@oberlin.edu FAU - Daruwalla, Zeeba AU - Daruwalla Z FAU - Roth, Therese M AU - Roth TM FAU - Attia, Naweah P AU - Attia NP FAU - Lukacs, Nicholas W AU - Lukacs NW FAU - Richards, Ayo-Lynn AU - Richards AL FAU - White, Ian O AU - White IO FAU - Allen, Susan J AU - Allen SJ FAU - Barald, Kate F AU - Barald KF LA - eng GR - R01 DC004184/DC/NIDCD NIH HHS/United States GR - R15 DC005587/DC/NIDCD NIH HHS/United States GR - R01DC04184/DC/NIDCD NIH HHS/United States GR - R15DC05587/DC/NIDCD NIH HHS/United States GR - R01DC05939/DC/NIDCD NIH HHS/United States GR - R01 DC005939/DC/NIDCD NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PL - United States TA - J Assoc Res Otolaryngol JT - Journal of the Association for Research in Otolaryngology : JARO JID - 100892857 RN - 0 (Chemokine CCL2) RN - 0 (Chemokine CCL5) RN - 0 (Chemokines) RN - 0 (Culture Media, Conditioned) RN - 0 (Tumor Necrosis Factor-alpha) SB - IM MH - Animals MH - Cell Line MH - Cell Proliferation MH - Chemokine CCL2/analysis/physiology MH - Chemokine CCL5/analysis/physiology MH - Chemokines/*physiology MH - Chemotaxis, Leukocyte MH - Chick Embryo MH - Culture Media, Conditioned MH - Ear, Inner/*cytology MH - Ganglia/*cytology MH - Mice MH - Monocytes/immunology MH - Neurites/physiology MH - Tumor Necrosis Factor-alpha/analysis/physiology PMC - PMC2504622 EDAT- 2005/10/22 09:00 MHDA- 2006/03/17 09:00 PMCR- 2006/12/01 CRDT- 2005/10/22 09:00 PHST- 2004/11/30 00:00 [received] PHST- 2005/07/20 00:00 [accepted] PHST- 2005/10/22 09:00 [pubmed] PHST- 2006/03/17 09:00 [medline] PHST- 2005/10/22 09:00 [entrez] PHST- 2006/12/01 00:00 [pmc-release] AID - 13 [pii] AID - 10.1007/s10162-005-0013-8 [doi] PST - ppublish SO - J Assoc Res Otolaryngol. 2005 Dec;6(4):355-67. doi: 10.1007/s10162-005-0013-8.