Envelope surface glycoprotein gp120
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env
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HIV-1 gp120 from a T-cell-tropic virus causes CD4-dependent antagonism of CXCR4 response to SDF-1alpha, whereas gp120 from macrophage-tropic viruses causes CD4-dependent antagonism of CCR5 response to MIP-1alpha |
PubMed
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env
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HIV-1 gp120-induced dephosphorylation of KV2.1 and re-localization of KV2.1 on the soma and proximal dendrites results in disruption of the clustered KV2.1 via activation of CCR5/CXCR4 co-receptors or SDF-1 alpha treatment |
PubMed
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env
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CXCL12 and HIV-1 gp120 modulate the excitability of Cajal-Retzius cells in opposite directions |
PubMed
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env
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The ability of HIV-1 gp120 to inhibit SDF-1alpha-induced chemotaxis is mediated by the CD4 receptor and Lck signaling |
PubMed
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env
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The entry of T cell-tropic HIV-1 isolates into cells is blocked by SDF-1, which interacts with the HIV-1 gp120 coreceptor CXCR4 |
PubMed
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env
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HIV-1 gp120 abnormally interferes with SDF-1-mediated T cell chemotaxis and cell migration in resting CD4+ T Cells |
PubMed
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env
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CXCL12 variant proteins exhibits the various levels of inhibition of HIV-1 X4 Env-mediated fusion. The strongest and weakest inhibition activities among the variant proteins in the X4 Env fusion assay are CXCL12gamma and CXCL12delta, respectively |
PubMed
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env
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RANTES, stromal derived factor-1alpha (SDF-1alpha), macrophage-derived chemokine (MDC), and their combination attenuate HIV-1 gp120-induced food and water intake decrease in rats |
PubMed
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env
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Apoptosis of CD8+ T cells is mediated by the interaction between TNF-alpha bound to the membrane of macrophages (mbTNF) and a receptor on CD8+ T cells (TNF-receptor II, or TNFRII), which is upregulated by treatment with recombinant HIV-1 gp120 or SDF-1 |
PubMed
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env
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The death rate of CD8+ T cells by apoptosis, which is induced by HIV-1 gp120 from CXCR4-tropic HIV strains or by the ligand of the chemokine receptor CXCR4 (SDF-1), increased markedly during HIV infection of peripheral blood mononuclear cells |
PubMed
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env
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A synthetic peptide domain of the V3 region of HIV-1 gp120 activates the FPRL1 receptor in monocytes and neutrophils and causes reduced response to several chemokines that use multiple cell receptors, including SDF-1alpha and RANTES |
PubMed
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env
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Chemokines such as fractalkine, macrophage-derived chemokine (MDC), RANTES, and SDF-1alpha are able to block gp120-induced apoptosis of hippocampal neurons; both fractalkine and MDC activate ERK-1/2, while SDF-1alpha activates CREB |
PubMed
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env
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SDF-1alpha reverses gp120-induced downregulation of CD79b in CD40- and IL-4-activated purified HIV-1 seronegative human peripheral blood B cells |
PubMed
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env
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CXCR4-tropic and CXCR4/CCR5 dual-tropic HIV-1 gp120 proteins inhibit B cell chemotaxis toward CXCL12, CCL20, and CCL21, and gp120-induced p38 MAPK activation is triggered by CCL21 and CCL20 |
PubMed
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env
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The fusion of insulin-like growth factor I (IGF I) with stromal cell-derived factor I or alpha1 proteinase inhibitor has the capacity to compete with the binding of HIV-1 gp120 to CD4 receptor |
PubMed
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Nef
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nef
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HIV-1 Nef inhibits CXCL12 induced chemotaxis in Jurkat cells, monocytes, and PBMCs, which leads to marked downregulation of F-actin accumulation in cells |
PubMed
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nef
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Disruption of the proline-rich region of HIV-1 Nef inhibits T-cell migration to SDF-1 alpha, suggesting Nef occupies a position in the CXCR4-mediated signaling pathway that is upstream of an SH3-dependent pathway |
PubMed
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nef
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An intracellular signaling pathway mediated by the binding of SDF-1alpha and CXCR4 is inhibited by Nef in both Jurkat T cells and primary peripheral CD4+ T lymphocytes |
PubMed
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Pr55(Gag)
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gag
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Expression of HIV-1 Gag attenuates SDF-1-mediated downregulation of CXCR4. The effect of Gag is dependent on a TSG101 interacting motif within the C-terminal p6 region of Gag |
PubMed
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Tat
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tat
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Microarray analysis indicates HIV-1 Tat-induced upregulation of chemokine (C-X-C motif) ligand 12 (CXCL12; SDF-1: stromal cell-derived factor 1) in primary human brain microvascular endothelial cells |
PubMed
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tat
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HIV-1 Tat tethered to the surface of syndecan-1 expression B-lymphoid cells or of peripheral blood monocytes promotes their transendothelial migration in vitro in response to CXCL12 or CCL5, respectively |
PubMed
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tat
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HIV-1 Tat increases CXCL12-induced internalization of CXCR4, and the Tat-mediated CXCR4 internalization requires activity of protein kinase C (zeta) |
PubMed
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tat
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HIV-1 Tat interacts with SDF-1alpha to induce apoptosis in Tat-treated erythroid cells |
PubMed
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tat
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HIV-1 Tat can inhibit CXCR4-mediated functions by interfering with the chemotactic activity of SDF-1/CXCL12, an effect mediated by Tat amino acids 25-31 |
PubMed
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tat
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HIV-1 Tat induces SDF-1alpha expression in neurons and Tat-mediated neurite outgrowth is blocked by anti-SDF-1alpha antibody, suggesting a role for SDF-1alpha in the neuronal response to HIV in brains of AIDS patients |
PubMed
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tat
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SDF-1 is upregulated by HIV-1 Tat treatment in human epithelial cells |
PubMed
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tat
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SDF-1alpha stimulates the ability of HIV-1 Tat to transactivate the HIV-1 LTR promoter |
PubMed
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tat
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HIV-1 Tat competes with SDF-1alpha for binding to CXCR4 |
PubMed
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