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Updated: Aug 16, 2026

A Rat Model of EcoHIV Brain Infection
Published on: January 21, 2021
HIV disorders of the brain: pathology and pathogenesis
Luis Del Valle1, Sergio Piña-Oviedo
1Center for Neurovirology and Cancer Biology, Laboratory of Neuropathology and Molecular Pathology, Temple University, Philadelphia, Pennsylvania 19122, USA. lvalle@temple.edu
Insights
Human Immunodeficiency Virus (HIV-1) infection causes AIDS, leading to brain complications like AIDS-Encephalopathy and opportunistic infections. While highly active anti-retroviral therapy (HAART) manages HIV, these neurological conditions remain prevalent.
Area of Science:
- Neuroscience
- Infectious Diseases
- Oncology
Background:
- HIV-1 infection is a global epidemic, causing AIDS and significant mortality.
- Highly active anti-retroviral therapy (HAART) has transformed AIDS into a chronic condition.
- Neuropathological conditions affect 70-90% of AIDS patients, stemming from HIV or opportunistic infections.
Purpose of the Study:
- To review the pathology and pathophysiology of AIDS-Encephalopathy.
- To discuss significant opportunistic infections affecting the brain in AIDS patients.
- To highlight primary CNS lymphoma as an AIDS-defining malignancy.
Main Methods:
- Literature review of neuropathological conditions in AIDS patients.
- Analysis of the impact of HIV-1 and opportunistic infections on the central nervous system.
- Examination of AIDS-defining conditions affecting the brain.
Main Results:
- AIDS-Encephalopathy is a common complication of HIV-1 infection.
- Opportunistic infections like PML, Toxoplasmosis, and Cryptococcosis frequently impact the brain in AIDS.
- Primary CNS lymphoma is a notable brain malignancy associated with HIV-1.
Conclusions:
- Neuropathological conditions remain a significant challenge in managing AIDS, despite HAART.
- Understanding these conditions is crucial for comprehensive patient care.
- Early diagnosis and management of brain complications are vital for improving outcomes in HIV-1 infected individuals.
Abstract:
Infection with HIV-1 has spread exponentially in recent years to reach alarming proportions. It is estimated than more than 33 million adults and 1.3 million children are infected worldwide. Approximately 16,000 new cases are diagnosed every day and almost 3 million people die every year from AIDS, making it the fourth leading cause of death in the world. Since the introduction of highly active anti-retroviral therapy (HAART) in the mid 1990s, the morbidity and mortality associated with HIV-1 infection has significantly decreased and AIDS has become a chronic disorder. However, neuropathological conditions associated with AIDS are still present in approximately 70 to 90% of patients and can be the result of HIV itself or of opportunistic infections. Here we briefly review the pathology and pathophysiology of AIDS-Encephalopathy, of some of the significant opportunistic infections affecting the brain in the context of AIDS, including Progressive Multifocal Leukoencephalopathy (PML) a demyelinating disease caused by the human neurotropic JC virus, Toxoplasmosis, Cryptococcosis and of primary CNS lymphoma, a brain malignancy frequently associated with HIV-1 infection, all of them considered AIDS defining conditions.
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