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Cardiomyopathy and encephalopathy in AIDS
A Antinori1, M L Giancola, L Alba
1National Institute for Infectious Diseases Lazzaro Spallanzani-IRCCS, Rome, Italy. antinori@inmi.it
Insights
HIV-associated encephalopathy and cardiac dysfunction are common in AIDS patients. Mononuclear phagocytes drive neuroinflammation and cardiac issues, but antiretroviral therapy can mitigate these effects.
Area of Science:
- Neurology
- Cardiology
- Immunology
Background:
- HIV encephalopathy is a frequent neurological complication in AIDS patients.
- Subclinical cardiac abnormalities are prevalent in HIV-positive individuals, potentially linked to inflammatory mediators.
Purpose of the Study:
- To explore the relationship between neurological and cardiac manifestations in HIV infection.
- To investigate the role of mononuclear phagocytes in HIV-related CNS and cardiac damage.
Main Methods:
- Histological examination of brain tissue revealing astrocytosis, myelin pallor, and inflammatory cell infiltration.
- Analysis of inflammatory products and cytokines implicated in cardiac abnormalities.
Main Results:
- Mononuclear phagocytes are the primary targets for HIV-1 replication in the brain, releasing neurotoxic products.
- A common inflammatory pathway links neurological and cardiac dysfunction, suggesting cardiomyopathy may coexist with encephalopathy and impact survival.
Conclusions:
- HIV infection can lead to both neurological and cardiac complications, mediated by inflammatory processes.
- Antiretroviral therapy shows promise in reducing the impact of these abnormalities by suppressing viral load.
Abstract:
HIV encephalopathy has been in the past years the most typical CNS disorder in patients with AIDS. Histologic abnormalities consist in astrocytosis, myelin pallor, infiltration by infected macrophages, resident microglia and multinucleated giant cells, generally in absence of direct infection of neurons. Mononuclear phagocytes in the brain are the main target of HIV-1 infection and the site of productive viral replication, and viral stimulation leads to the release of neurotoxic products causing neurologic damage. Subclinical cardiac abnormalities are common in HIV+ patients and several studies suggested a role for cytokines and other inflammatory products as mediators of cardiac abnormalities. The common pathway for neurologic and cardiac manifestations supports the relationship between neurologic disease and cardiac dysfunction in HIV infection. Clinical observations suggest that cardiomyopathy could be associated with encephalopathy in HIV+ patients and that it may affect survival. Antiretroviral therapy may reduce impact of neurologic and cardiac abnormalities by suppressing plasma HIV-1 viral load.