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Published on: July 24, 2016
HIV-1 encephalopathy in children
1University of Rochester, New York, USA.
Insights
Human Immunodeficiency Virus type 1 (HIV-1) infection causes significant neurologic issues in children, including dementia. Understanding HIV-1
Area of Science:
- Neuroscience
- Virology
- Immunology
Background:
- HIV-1 infection is a global pandemic disproportionately affecting children, leading to severe neurological complications.
- Neurological manifestations are a primary cause of morbidity and mortality in pediatric HIV-1 infection.
- HIV-1 dementia is a growing concern in young adults due to increased survival rates from antiretroviral therapies.
Purpose of the Study:
- To elucidate the mechanisms underlying HIV-1-induced neuronal injury and death in the developing central nervous system.
- To identify potential therapeutic targets for mitigating neurological dysfunction in pediatric HIV-1 infection.
Main Methods:
- Review of existing evidence on HIV-1 neuropathogenesis.
- Analysis of the proposed mechanisms of neuronal apoptosis induced by HIV-1.
Main Results:
- HIV-1 does not productively infect neurons but induces apoptosis.
- Neurotoxic factors (cytokines, phospholipid mediators, eicosanoids) and HIV-1 gene products from infected macrophages contribute to neuronal cell death.
- Macrophages play a key role in mediating HIV-1 neurotoxicity.
Conclusions:
- Understanding the pathways of neuronal injury is crucial for developing interventions against HIV-1-associated neurological disorders.
- Targeting neurotoxic factors and macrophage-mediated effects may offer therapeutic benefits for the central nervous system in HIV-1-infected children.
Abstract:
HIV-1 infection is a worldwide pandemic, with an estimate of one to two million children infected by the end of the decade. The neurologic manifestations of primary HIV-1 infection in children are a major cause of morbidity and contribute to the fatal outcome in this condition. In the United States, HIV-1 is the most frequent cause of dementia in young adults. Because antiretroviral therapies and treatment for opportunistic infections have lengthened the survival time but not eradicated the virus from the central nervous system, it is likely that the incidence of neurologic dysfunction, including HIV-1 dementia, will increase. Available evidence suggests that the HIV-1 virus does not productively infect neurons but rather induces programmed cell death (apoptosis) in neurons by production of neurotoxic factors, including cytokines, phospholipid mediators, and eicosanoids, and HIV-1 gene products from HIV-1-infected macrophages in the brain. Understanding the mechanisms involved in neuronal cell injury and death may lead to new therapeutic interventions for the neurologic dysfunction associated with HIV-1 infection of the developing central nervous system.
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