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. Protection against many intracellular pathogens is provided by CD8 T cells, and pathogen-specific CD8 T cells are thought to need CD4 T cell help to develop into effective memory CD8 T cells. Since murine CD8 T cells do not transcribe MHC class II genes, several models have proposed antigen presenting cells (APCs) as intermediaries required for CD4 T cells to deliver their help to CD8 T cells. We have demonstrates the presence of MHC class II molecules on activated murine CD8 T cells in vitro as well as in vivo. These CD8 T cells acquire MHC class II from their activating APCs, particularly CD11c positive dendritic cells (DCs), via a process called trogocytosis. Transferred MHC class II molecules on activated murine CD8 T cells were functionally competent and could directly stimulate specific indicator CD4 T cells. CD8 T cells that were """"""""helped"""""""" in vitro and subsequently allowed to rest in vivo showed enhanced recall responses upon challenge compared to """"""""helpless"""""""" CD8 T cells;in contrast, no differences were seen upon immediate challenge. These data indicate that direct CD8:CD4 T cell interactions may significantly contribute to help for CD8 T cells. Furthermore, this mechanism may enable CD8 T cells to communicate with different subsets of interacting CD4 T cells that could modulate immune responses. These studies could have implications for HIV/AIDS research.

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Primate Research Center Grants (P51)
Project #
2P51RR000165-51
Application #
8357482
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
$74,294
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

Showing the most recent 10 out of 880 publications