PMID- 17870298 OWN - NLM STAT- MEDLINE DCOM- 20080205 LR - 20181113 IS - 1090-2139 (Electronic) IS - 0889-1591 (Print) IS - 0889-1591 (Linking) VI - 22 IP - 2 DP - 2008 Feb TI - SIV infection decreases sympathetic innervation of primate lymph nodes: the role of neurotrophins. PG - 185-94 AB - The sympathetic nervous system regulates immune responses in part through direct innervation of lymphoid organs. Recent data indicate that viral infections can alter the structure of lymph node innervation. To determine the molecular mechanisms underlying sympathetic denervation during Simian Immunodeficiency Virus (SIV) infection, we assessed the expression of neurotrophic factors and neuromodulatory cytokines within lymph nodes from experimentally infected rhesus macaques. Transcription of nerve growth factor (NGF), brain-derived neurotropic factor (BDNF) and neurotrophin-4 (NT4) decreased significantly in vivo during chronic SIV infection, whereas expression of the neuro-inhibitory cytokine interferon-gamma (IFN gamma) was up-regulated. Acute SIV infection of macaque leukocytes in vitro induced similar changes in the expression of neurotrophic and neuro-inhibitory factors, indicative of an innate immune response. Statistical mediation analyses of data from in vivo lymph node gene expression suggested that coordinated changes in expression of multiple neuromodulatory factors may contribute to SIV-induced depletion of catecholaminergic varicosities within lymphoid tissue. Given previous evidence that lymph node catecholaminergic varicosities can enhance SIV replication in vivo, these results are consistent with the hypothesis that reduced expression of neurotrophic factors during infection could constitute a neurobiological component of the innate immune response to viral infection. FAU - Sloan, Erica K AU - Sloan EK AD - University of California Los Angeles, Department of Medicine, Division of Hematology-Oncology, UCLA School of Medicine, CA, USA. esloan@ucla.edu FAU - Nguyen, Christina T AU - Nguyen CT FAU - Cox, Benjamin F AU - Cox BF FAU - Tarara, Ross P AU - Tarara RP FAU - Capitanio, John P AU - Capitanio JP FAU - Cole, Steve W AU - Cole SW LA - eng GR - CA116778/CA/NCI NIH HHS/United States GR - R01 CA116778/CA/NCI NIH HHS/United States GR - R01 AI052737/AI/NIAID NIH HHS/United States GR - MH049033/MH/NIMH NIH HHS/United States GR - AI/NS052737/AI/NIAID NIH HHS/United States GR - R01 CA116778-02/CA/NCI NIH HHS/United States GR - R01 MH049033/MH/NIMH NIH HHS/United States GR - R01 AI052737-04/AI/NIAID NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20070917 PL - Netherlands TA - Brain Behav Immun JT - Brain, behavior, and immunity JID - 8800478 RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (Leukemia Inhibitory Factor) RN - 0 (Nerve Growth Factors) RN - 0 (Neurotrophin 3) RN - 82115-62-6 (Interferon-gamma) RN - 9061-61-4 (Nerve Growth Factor) RN - P658DCA9XD (neurotrophin 4) SB - IM MH - Animals MH - Brain-Derived Neurotrophic Factor/genetics MH - Gene Expression/immunology MH - Interferon-gamma/genetics MH - Leukemia Inhibitory Factor/genetics MH - Leukocytes/immunology/virology MH - Lymph Nodes/innervation/physiology/virology MH - Macaca mulatta MH - Nerve Growth Factor/genetics MH - Nerve Growth Factors/*genetics MH - Neurotrophin 3/genetics MH - Simian Acquired Immunodeficiency Syndrome/*immunology/physiopathology MH - Simian Immunodeficiency Virus/growth & development/*immunology MH - Sympathetic Nervous System/*immunology/*virology MH - Virus Replication PMC - PMC2254209 MID - NIHMS38731 EDAT- 2007/09/18 09:00 MHDA- 2008/02/06 09:00 PMCR- 2009/02/01 CRDT- 2007/09/18 09:00 PHST- 2007/05/21 00:00 [received] PHST- 2007/07/12 00:00 [revised] PHST- 2007/07/13 00:00 [accepted] PHST- 2007/09/18 09:00 [pubmed] PHST- 2008/02/06 09:00 [medline] PHST- 2007/09/18 09:00 [entrez] PHST- 2009/02/01 00:00 [pmc-release] AID - S0889-1591(07)00165-1 [pii] AID - 10.1016/j.bbi.2007.07.008 [doi] PST - ppublish SO - Brain Behav Immun. 2008 Feb;22(2):185-94. doi: 10.1016/j.bbi.2007.07.008. Epub 2007 Sep 17.