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Updated: Aug 4, 2026

A Chromatin Immunoprecipitation Assay to Identify Novel NFAT2 Target Genes in Chronic Lymphocytic Leukemia
Published on: December 4, 2018
Signals transduced through the CD4 molecule on T lymphocytes activate NF-kappa B
N Chirmule1, V S Kalyanaraman, S Pahwa
1Department of Pediatrics, North Shore University Hospital-Cornell University Medical College, Manhasset, NY 11030.
Native HIV-1 envelope glycoproteins (gp160) activate the NF-kappa B transcription factor via CD4 molecules. This activation involves specific proteins and signaling pathways, potentially influencing HIV replication and immune responses.
Area of Science:
- Immunology
- Virology
- Molecular Biology
Background:
- Human Immunodeficiency Virus type 1 (HIV-1) envelope glycoproteins play critical roles in viral entry and pathogenesis.
- The transcription factor Nuclear Factor kappa B (NF-kappa B) is a key regulator of immune responses and cellular processes.
Purpose of the Study:
- To investigate the role of native HIV-1 envelope glycoproteins (gp160) in activating the NF-kappa B transcription factor.
- To elucidate the cellular mechanisms and pathways involved in gp160-mediated NF-kappa B activation.
Main Methods:
- Utilized cell-based assays to assess NF-kappa B activation.
- Employed soluble CD4 to investigate the role of the CD4 receptor.
- Analyzed the protein composition of the NF-kappa B complex.
- Investigated the dependence on protein synthesis and tyrosine phosphorylation.
- Examined the role of protein kinase C inhibitors.
Main Results:
- Native HIV-1 gp160 induces NF-kappa B activation in a CD4-dependent manner.
- The activated NF-kappa B complex comprises p65, p50, and c-rel proteins.
- gp160-induced NF-kappa B activation is independent of protein synthesis but relies on protein tyrosine phosphorylation and protein kinase C signaling.
Conclusions:
- HIV-1 gp160 activates NF-kappa B in CD4+ T cells through specific molecular pathways.
- This activation may contribute to various biological effects associated with HIV infection, including enhanced viral replication and immune dysregulation.
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