This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. This project focuses on understanding the reasons why natural hosts for SIV infection, such as the sooty mangabeys (SMs), in striking contrast to HIV-infected individuals, are not susceptible to AIDS despite high viremia. We recently showed that CCR5 expression is significantly lower in central memory CD4+ T cells of SMs when compared to humans and macaques, and that this lower expression results in decreased susceptibility to SIV infection. This work is now submitted for publication. In addition, as part of the studies sponsored by R01-AI66998, we have made three novel observation that are all now published (see below). The first observation is that the conclusion of a five-years longitudinal survey of naturally SIV-infected SMs prompted us to realize that the infection is associated with a slow but progressive decline of CD4+ T cells without increasing viral load or immune activation. The second observation is that 5-7% of naturally SIV-infected SMs are homozygous for a 2bp deletion in the second extracellular loop of CCR5 that results in abrogated surface expression of thsi molecule. Interestingly, these rare CCR5 knock-out SMs are infected with SIV albeit at lower levels. These animals do not develop viruses using CXCR4, but other SIV co-receptors such as GPR-1 and GPR-15. The third observation is that, in naturally SIV-infected SMs, the level of autologous neutralizing antibodies is very low, and does not correlate with either viral load or CD4+ T cell loss. We believe that these data improve our understanding of the pathophysiology of SIV infection in SMs.

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Primate Research Center Grants (P51)
Project #
2P51RR000165-51
Application #
8357469
Study Section
Special Emphasis Panel (ZRR1-CM-5 (01))
Project Start
2011-08-01
Project End
2012-04-30
Budget Start
2011-08-01
Budget End
2012-04-30
Support Year
51
Fiscal Year
2011
Total Cost
$89,196
Indirect Cost
Name
Emory University
Department
Otolaryngology
Type
Schools of Medicine
DUNS #
066469933
City
Atlanta
State
GA
Country
United States
Zip Code
30322
Maddox, S A; Kilaru, V; Shin, J et al. (2017) Estrogen-dependent association of HDAC4 with fear in female mice and women with PTSD. Mol Psychiatry :
Banerjee, Sunayana B; Gutzeit, Vanessa A; Baman, Justin et al. (2017) Perineuronal Nets in the Adult Sensory Cortex Are Necessary for Fear Learning. Neuron 95:169-179.e3
Bruner, Emiliano; Preuss, Todd M; Chen, Xu et al. (2017) Evidence for expansion of the precuneus in human evolution. Brain Struct Funct 222:1053-1060
Chen, Guiqin; Nie, Shuke; Han, Chao et al. (2017) Antidyskinetic Effects of MEK Inhibitor Are Associated with Multiple Neurochemical Alterations in the Striatum of Hemiparkinsonian Rats. Front Neurosci 11:112
Dehkharghani, S; Fleischer, C C; Qiu, D et al. (2017) Cerebral Temperature Dysregulation: MR Thermographic Monitoring in a Nonhuman Primate Study of Acute Ischemic Stroke. AJNR Am J Neuroradiol 38:712-720
Walker, Lary C; Jucker, Mathias (2017) The Exceptional Vulnerability of Humans to Alzheimer's Disease. Trends Mol Med 23:534-545
Payne, Christa; Cirilli, Laetitia; Bachevalier, Jocelyne (2017) An MRI study of the corpus callosum in monkeys: Developmental trajectories and effects of neonatal hippocampal and amygdala lesions. Dev Psychobiol 59:495-506
Tedesco, Dana; Thapa, Manoj; Gumber, Sanjeev et al. (2017) CD4(+) Foxp3(+) T cells promote aberrant immunoglobulin G production and maintain CD8(+) T-cell suppression during chronic liver disease. Hepatology 65:661-677
Hecht, E E; Mahovetz, L M; Preuss, T M et al. (2017) A neuroanatomical predictor of mirror self-recognition in chimpanzees. Soc Cogn Affect Neurosci 12:37-48
Fonseca, Jairo A; McCaffery, Jessica N; Kashentseva, Elena et al. (2017) A prime-boost immunization regimen based on a simian adenovirus 36 vectored multi-stage malaria vaccine induces protective immunity in mice. Vaccine 35:3239-3248

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