Human Gene Set: GSE26495_PD1HIGH_VS_PD1LOW_CD8_TCELL_DN


Standard name GSE26495_PD1HIGH_VS_PD1LOW_CD8_TCELL_DN
Systematic name M4662
Brief description Genes down-regulated in comparison of PD-1 high CD8 T cells versus PD-1 low CD8 T cells.
Full description or abstract T cell dysfunction is an important feature of many chronic viral infections. In particular, it was shown that PD-1 regulates T cell dysfunction during chronic LCMV infection in mice and PD-1 high cells exhibit an intense exhausted gene signature. These findings were extended to human chronic infections such as HIV, HCV and HBV. However, it is not known if PD-1 high cells of healthy humans have the traits of exhausted cells. In this study, we provide a comprehensive description of phenotype, function and gene expression profiles of PD-1 high versus PD-1 low CD8 T cells in the peripheral blood of healthy human adults as following: 1) The percentage of naive and memory CD8 T cells varied widely in the peripheral blood cells of healthy humans and PD-1 was expressed by the memory CD8 T cells. 2) PD-1 high CD8 T cells in healthy humans did not significantly correlated with the PD-1 high exhausted gene signature of HIV specific human CD8 T cells or chronic LCMV specific CD8 T cells from mice. 3) PD-1 expression did not directly affect the ability of CD8 T cells to secrete cytokines in healthy adults. 4) PD-1 was expressed by the effector memory (TEM) compared to ?terminally differentiated effector? (TEMRA) CD8 T cells. 5) Finally, an interesting inverse relationship between CD45RA and PD-1 expression was observed.
Collection C7: Immunologic Signature
      IMMUNESIGDB: ImmuneSigDB
Source publication Pubmed 21383243   Authors: Duraiswamy J,Ibegbu CC,Masopust D,Miller JD,Araki K,Doho GH,Tata P,Gupta S,Zilliox MJ,Nakaya HI,Pulendran B,Haining WN,Freeman GJ,Ahmed R
Exact source GSE26495_1504_200_DN
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Source species Homo sapiens
Contributed by Jernej Godec (Dana-Farber Cancer Institute)
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identifier namespace		 HUMAN_GENE_SYMBOL
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Version history 7.3: Moved to ImmuneSigDB sub-collection.

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