Sooty mangabeys and rhesus macaques exhibit significant divergent natural killer cell responses during both acute and chronic phases of SIV infection - PubMed (original) (raw)
Sooty mangabeys and rhesus macaques exhibit significant divergent natural killer cell responses during both acute and chronic phases of SIV infection
L E Pereira et al. Cell Immunol. 2008.
Abstract
A correlation between NK cells and rate of disease progression in HIV-1-infected individuals has been documented. The role NK cells play in disease outcome can optimally be studied in SIV-infected disease susceptible rhesus macaques (RM) and SIV-infected disease resistant sooty mangabeys (SM). In this study, three main subsets of CD16(+)CD56(-), CD16(-/dim)CD56(+) and CD16(-)CD56(-) NK cells have been identified with the predominant CD16(+)CD56(-) subset being primarily responsible for cytolytic activity in both species. Cross-sectional studies revealed a significant decline in the frequency and function of this cytolytic subset in SIV-infected RM while an increase occurred in SIV-infected SM. Longitudinal studies revealed that an earlier NK response during acute infection occurred in all SIV-infected SM and in select SIV-infected RM that eventually controlled viral load set point during chronic infection, suggesting that early NK activity and continued maintenance of this cell lineage may indirectly contribute to disease resistance.
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