SDF-1alpha regulates HIV-1-gp120-induced changes in CD79b surface expression and Ig production in activated human B cells

Binding of HIV-1 glycoprotein (gp120) to activated B cells of HIV-infected and HIV-uninfected subjects induces increased cell proliferation, cAMP generation, immunoglobulin (Ig) production and downregulation of the invariant chain, CD79b, of the B-cell receptor. We present evidence that the stromal...

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Veröffentlicht in:Clinical immunology (Orlando, Fla.). - 1999. - 105(2002), 2 vom: 01. Nov., Seite 208-14
1. Verfasser: Nance, Christina L (VerfasserIn)
Weitere Verfasser: Shearer, William T
Format: Aufsatz
Sprache:English
Veröffentlicht: 2002
Zugriff auf das übergeordnete Werk:Clinical immunology (Orlando, Fla.)
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Non-programmatic Anti-HIV Agents Antigens, CD CD79 Antigens CD79B protein, human CXCL12 protein, human Chemokine CXCL12 mehr... Chemokines, CXC HIV Envelope Protein gp120 Immunoglobulins Receptors, CXCR4
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520 |a Binding of HIV-1 glycoprotein (gp120) to activated B cells of HIV-infected and HIV-uninfected subjects induces increased cell proliferation, cAMP generation, immunoglobulin (Ig) production and downregulation of the invariant chain, CD79b, of the B-cell receptor. We present evidence that the stromal cell-derived factor-1alpha (SDF-1alpha), itself a B-cell stimulant, reversed gp120-driven downregulation of CD79b in CD40- and IL-4-activated purified HIV-1 seronegative human peripheral blood B cells. SDF-1alpha augmented gp120-induced Ig production, downregulated CXCR4 receptor expression, and alone, exerted no effect on CD79b surface expression, reversed the gp120-induced downregulation of CD79b. These SDF-1alpha-modulated B-cell responses were specifically abrogated by an anti-SDF-1alpha antibody. These data suggest that SDF-1alpha plays an important regulatory role in the altered B-cell responses seen in HIV-1 infection. Further, these findings may enhance the understanding of the pathophysiology of HIV-1 infection and suggest a strategy utilizing SDF-1alpha or related molecules as an anti-HIV therapy 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Research Support, U.S. Gov't, P.H.S. 
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650 7 |a Chemokine CXCL12  |2 NLM 
650 7 |a Chemokines, CXC  |2 NLM 
650 7 |a HIV Envelope Protein gp120  |2 NLM 
650 7 |a Immunoglobulins  |2 NLM 
650 7 |a Receptors, CXCR4  |2 NLM 
700 1 |a Shearer, William T  |e verfasserin  |4 aut 
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