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Near Full-Length Genomic Characterization of a Novel HIV-1 Unique Recombinant (A1/D/K) from an Immigrant Worker in China Using Nanopore Sequencing.
AIDS Res Hum Retroviruses
January 2025
State Key Laboratory of Emerging Infectious Disease Detection, Zhuhai International Travel Healthcare Center, Zhuhai, China.
Recombination contributes substantially to the genetic diversity of HIV-1. Here we reported a novel HIV-1 recombinant detected from a Chinese labor who had been to Uganda as an immigrant worker using nanopore sequencing. Near full-length genome (NFLG) phylogenetic analysis showed that the novel HIV-1 recombinant HIV-sd1801 stood in a distinct branch between the CRF130_A1B/CRF131_A1B and CRF50_A1D/CRF84_A1D reference sequences.
View Article and Find Full Text PDFAstrocytic HIV-1 Nef Expression Decreases Glutamate Transporter Expression in the Nucleus Accumbens and Increases Cocaine-Seeking Behavior in Rats.
Pharmaceuticals (Basel)
January 2025
Department of Basic Sciences, Ponce Research Institute, Ponce Health Sciences University, Ponce, PR 00716, USA.
Background/objectives: Cocaine use disorder is an intersecting issue in populations with HIV-1, further exacerbating the clinical course of the disease and contributing to neurotoxicity and neuroinflammation. Cocaine and HIV neurotoxins play roles in neuronal damage during neuroHIV progression by disrupting glutamate homeostasis in the brain. Even with combined antiretroviral therapy (cART), HIV-1 Nef, an early viral protein expressed in approximately 1% of infected astrocytes, remains a key neurotoxin.
View Article and Find Full Text PDFRev-RRE activity modulates HIV-1 replication and latency reactivation: Implications for viral persistence and cure strategies.
bioRxiv
January 2025
Department of Microbiology, Immunology, and Cancer Biology, School of Medicine, University of Virginia, Charlottesville, Virginia, USA.
The HIV-1 Rev-RRE regulatory axis plays a crucial role in viral replication by facilitating the nucleo-cytoplasmic export and expression of viral mRNAs with retained introns. In this study, we investigated the impact of variation in Rev-RRE functional activity on HIV-1 replication kinetics and reactivation from latency. Using a novel HIV-1 clone with an interchangeable Rev cassette, we engineered viruses with different Rev functional activities and demonstrated that higher Rev-RRE activity confers greater viral replication capacity while maintaining a constant level of Nef expression.
View Article and Find Full Text PDFConstruction of a Macrophage-Tropic Subtype C HIV-1-mGreenLantern Reporter Virus for Studies on HIV-1 Replication and the Impact of Methamphetamine.
Viruses
November 2024
Departments of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
HIV-1 subtype C viruses are responsible for 50% of global HIV burden. However, nearly all currently available reporter viruses widely used in HIV research are based on subtype B. We constructed and characterized a replication-competent HIV-1 subtype C reporter virus expressing mGreenLantern.
View Article and Find Full Text PDFEnhancement of Human Immunodeficiency Virus-Specific CD8 T Cell Responses with TIGIT Blockade Involves Trogocytosis.
Pathogens
December 2024
Immunology and Infectious Diseases Program, Division of BioMedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL A1B 3V6, Canada.
Natural killer (NK) and CD8 T cell function is compromised in human immunodeficiency virus type 1 (HIV-1) infection by increased expression of inhibitory receptors such as TIGIT (T cell immunoreceptor with Ig and ITIM domains). Blocking inhibitory receptors or their ligands with monoclonal antibodies (mAb) has potential to improve antiviral immunity in general and facilitate HIV eradication strategies. We assessed the impact of TIGIT engagement and blockade on cytotoxicity, degranulation, and interferon-gamma (IFN-γ) production by CD8 T cells from persons living with HIV (PLWH).
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