PMID- 25218806 OWN - NLM STAT- MEDLINE DCOM- 20150812 LR - 20171116 IS - 1873-7544 (Electronic) IS - 0306-4522 (Linking) VI - 280 DP - 2014 Nov 7 TI - Lipopolysaccharides and trophic factors regulate the LPS receptor complex in nodose and trigeminal neurons. PG - 60-72 LID - S0306-4522(14)00740-4 [pii] LID - 10.1016/j.neuroscience.2014.08.053 [doi] AB - Binding of bacterial lipopolysaccharides (LPS) to toll-like receptor 4 (TLR4) triggers an innate immunoresponse associated with pain and inflammation. The expression, and to a greater extent the regulation of TLR4 and its auxiliary proteins (myeloid differentiation protein 1 (MD1), myeloid differentiation protein 2 (MD2) and cluster of differentiation 14 (CD14)), are both poorly understood in trigeminal and nodose neurons. We used a combination of Western blotting, semi-quantitative polymerase chain reaction (PCR), pharmacological manipulation and immunohistochemistry. The expression pattern and regulation by LPS and trophic factors of TLR4/MD2/CD14 and radioprotective protein of 105kDa (RP105)/MD1 were determined in neonatal trigeminal and nodose mice neurons. We found that all these proteins were expressed in both trigeminal and nodose neurons. The trophic factors Artemin and nerve growth factor (NGF) up-regulated MD2 and RP105 mRNA levels in trigeminal neurons. In nodose neurons the trophic factors brain-derived neurotrophic factor (BDNF), ciliary neurotrophic factor (CNTF) and leukemia inhibitory factor (LIF) up-regulated MD1 and RP105 mRNA levels. Also we observed that in both neuronal types LPS acutely (within 20 min) down-regulated CD14 and MD2 mRNAs. In addition, LPS increased significantly the proportion of trigeminal and nodose neurons expressing nociceptin/orphanin FQ in culture probably acting via TLR4/MD2. Although the exact mechanisms underlying the regulation by trophic factors and LPS require further elucidation, the findings of this study indicate that LPS acts through its archetypical receptor in trigeminal and nodose neurons. CI - Copyright (c) 2014 IBRO. Published by Elsevier Ltd. All rights reserved. FAU - Kunda, P E AU - Kunda PE AD - Instituto de Investigaciones en Ciencias de la Salud (INICSA), Facultad de Ciencias Medicas, Universidad Nacional de Cordoba, 5000 Cordoba, Argentina. FAU - Cavicchia, J C AU - Cavicchia JC AD - Instituto de Histologia y Embriologia de Mendoza (IHEM), Facultad de Medicina, Universidad Nacional de Cuyo, 5500 Mendoza, Argentina. FAU - Acosta, C G AU - Acosta CG AD - Instituto de Histologia y Embriologia de Mendoza (IHEM), Facultad de Medicina, Universidad Nacional de Cuyo, 5500 Mendoza, Argentina. Electronic address: cacosta@fcm.uncu.edu.ar. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140911 PL - United States TA - Neuroscience JT - Neuroscience JID - 7605074 RN - 0 (Antigens, CD) RN - 0 (Antigens, Surface) RN - 0 (Artn protein, mouse) RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (Ciliary Neurotrophic Factor) RN - 0 (Leukemia Inhibitory Factor) RN - 0 (Lif protein, mouse) RN - 0 (Lipopolysaccharide Receptors) RN - 0 (Lipopolysaccharides) RN - 0 (Ly78 protein, mouse) RN - 0 (Ly86 protein, mouse) RN - 0 (Ly96 protein, mouse) RN - 0 (Lymphocyte Antigen 96) RN - 0 (Membrane Glycoproteins) RN - 0 (Nerve Tissue Proteins) RN - 0 (RNA, Messenger) RN - 0 (Tlr4 protein, mouse) RN - 0 (Toll-Like Receptor 4) SB - IM MH - Animals MH - Antigens, CD/metabolism MH - Antigens, Surface/metabolism MH - Brain-Derived Neurotrophic Factor/metabolism MH - Cells, Cultured MH - Ciliary Neurotrophic Factor/metabolism MH - Leukemia Inhibitory Factor/metabolism MH - Lipopolysaccharide Receptors/metabolism MH - Lipopolysaccharides/*metabolism MH - Lymphocyte Antigen 96/metabolism MH - Membrane Glycoproteins/metabolism MH - Mice MH - Nerve Tissue Proteins/metabolism MH - Neurons/*metabolism MH - Nodose Ganglion/*metabolism MH - RNA, Messenger/metabolism MH - Toll-Like Receptor 4/metabolism MH - Trigeminal Ganglion/*metabolism OTO - NOTNLM OT - LPS OT - TLR4 OT - nociceptin/orphanin Q OT - nodose OT - trigeminal OT - trophic factors EDAT- 2014/09/15 06:00 MHDA- 2015/08/13 06:00 CRDT- 2014/09/15 06:00 PHST- 2014/07/03 00:00 [received] PHST- 2014/08/12 00:00 [revised] PHST- 2014/08/26 00:00 [accepted] PHST- 2014/09/15 06:00 [entrez] PHST- 2014/09/15 06:00 [pubmed] PHST- 2015/08/13 06:00 [medline] AID - S0306-4522(14)00740-4 [pii] AID - 10.1016/j.neuroscience.2014.08.053 [doi] PST - ppublish SO - Neuroscience. 2014 Nov 7;280:60-72. doi: 10.1016/j.neuroscience.2014.08.053. Epub 2014 Sep 11.