Hiv Infection
Hiv Infection - Related Videos
03:13
Establishing an Active HIV Infection in a Rat Model
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2025
This video demonstrates the procedure of injecting chimeric HIV viruses into the cortex of a rat's brain, where the virus RNA integrates into the host genome, replicates, and spreads to establish an active HIV infection in the experimental model.
13:58
Amplifying and Quantifying HIV-1 RNA in HIV Infected Individuals with Viral Loads Below the Limit of Detection by Standard Clinical Assays
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Cited by 10 •
2011
Quantifying levels of HIV-1 RNA in plasma and sequencing single HIV-1 genomes from individuals with viral loads below the limit of detection (50-75 copies/ml) is difficult. Here we describe how to extract and quantify plasma viral RNA using a real time PCR assay that reliably measures HIV-1 RNA down to 0.3 copies/ml and how to amplify viral genomes by single genome sequencing, from samples with very low viral loads.
02:49
Generation of an In Vitro Cell Culture Model of Malaria-HIV Co-Infection
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2025
This video demonstrates the generation of an in vitro malaria-HIV co-infection cell culture model. HIV-infected peripheral blood mononuclear cells co-cultured with Plasmodium falciparum parasitized erythrocytes potentially support each other's growth and provide insights into the immune responses and disease progression in HIV and malaria co-infections.
08:14
An In Vitro Model for Measuring Immune Responses to Malaria in the Context of HIV Co-infection
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Cited by 1 •
2015
Human co-infection is difficult to replicate in vitro. However, human malaria parasites can readily be cultured in vitro, as can freshly isolated human peripheral blood mononuclear cells naturally infected with HIV. This provides an excellent model for studying early immune responses to malaria parasites in the context of HIV co-infection.
09:27
New Tools to Expand Regulatory T Cells from HIV-1-infected Individuals
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Cited by 4 •
2013
CD4+ Regulatory T cells are potent immune-modulators and serve important functions in immune homeostasis. The paucity of these cells in peripheral blood makes functional studies challenging, specifically in the context of HIV-1-infection. We here describe a method to isolate and expand functional CD4+ Tregs from peripheral blood from HIV-1-infected individuals.
FAQs
Once HIV enters a CD4 T lymphocyte, its replication cycle links several molecular events: reverse transcriptase copies viral RNA into DNA, and that DNA integrates into the host genome. The infected cell can then direct production of new viral particles, which spread to additional target cells. This sequence connects intracellular replication with progressive immune damage.
CD4 T lymphocytes are important because their progressive loss provides a direct immunological measure of disease impact. As their numbers decline, immune defenses become less effective, increasing the possibility that opportunistic infections will develop. Monitoring CD4 counts therefore helps relate viral activity to immune status and to progression toward acquired immunodeficiency syndrome.
Integration of viral DNA into the host genome is a key transition because it places HIV genetic material within the infected cell. The cell can then support production of additional viral particles, allowing infection to continue rather than remaining limited to the initial entry event. Studying this step connects intracellular mechanisms with ongoing viral spread and immune decline.
Antiretroviral therapy is intended to suppress viral load, preserve immune function, and reduce transmission. These outcomes address both sides of HIV infection: limiting viral activity while protecting the CD4 T lymphocytes needed for immune defense. In research, treatment effectiveness is therefore considered in relation to virological control, immune preservation, and the potential to reduce onward spread.
Research examines HIV infection at several connected levels: how the virus replicates, how host immune responses change, how transmission occurs, and how antiretroviral therapy affects viral load and immune function. Considering these areas together links molecular events to disease progression and helps investigators evaluate approaches that suppress the virus, preserve immunity, and reduce transmission.
Evaluation centers on whether treatment suppresses viral load, preserves immune function, and reduces transmission. Researchers can relate these outcomes to the replication cycle and to changes in CD4 T lymphocytes. This makes therapy studies relevant to both virology and immunology: success is measured not only by limiting viral production, but also by maintaining the host’s defenses.
Opportunistic infections indicate the consequences of weakening immune protection rather than representing an isolated viral effect. When CD4 T-lymphocyte counts decline without effective treatment, the immune system becomes increasingly vulnerable, and these infections can accompany progression toward acquired immunodeficiency syndrome. Their occurrence therefore connects HIV replication and immune-cell loss with clinically significant disease outcomes.