Bharatwaj Sowrirajan

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Natural killer (NK) cell degranulation in response to virus-infected cells is triggered by interactions between invariant NK cell surface receptors and their ligands on target cells. Although HIV-1 Vpr induces expression of ligands for NK cell activation receptor, NKG2D, on infected cells, this is not sufficient to promote lytic granule release. We show(More)
The chemokine receptor CCR7 plays a crucial role in the homing of central memory and naive T cells to peripheral lymphoid organs. Here, we show that the HIV-1 accessory protein Vpu downregulates CCR7 on the surface of CD4(+) T cells. Vpu and CCR7 were found to specifically interact and colocalize within the trans-Golgi network, where CCR7 is retained.(More)
Natural killer (NK) cells' major role in the control of viruses is to eliminate established infected cells. The capacity of NK cells to kill virus-infected cells is dependent on the interactions between ligands on the infected cell and receptors on the NK cell surface. Because of the importance of ligand-receptor interactions in modulating the NK cell(More)
Activation of primary CD4+ T cells induces the CD155, but not the CD112 ligands for the natural killer (NK) cell activation receptor (aNKR) CD226 [DNAX accessory molecule-1 (DNAM-1)]. We hypothesize that HIV productively infects activated CD4+ T cells and makes itself vulnerable to NK cell-mediated lysis when CD155 on infected T cells engages DNAM-1. The(More)
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