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A Review on HIV's Effects on Exploratory Activity, Motor Functions, and Learning in Animals.

Robert Lalonde1, Catherine Strazielle1

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Current HIV Research
|March 14, 2026
PubMed
Summary

Human immunodeficiency virus (HIV) infection causes neurological issues. Research shows corticosterone may worsen these brain effects, offering potential treatment insights for AIDS dementia complex.

Keywords:
AIDS.GlucocorticoidsTat proteingp120hypothalamic-pituitary-adrenal axismotor function

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Area of Science:

  • Neuroscience
  • Virology
  • Immunology

Background:

  • Human immunodeficiency virus (HIV) infection is linked to neuropsychological disorders like apathy, hypokinesia, and impaired motor skills, attention, and learning.
  • Animal models and transgenic rodents expressing HIV-1 proteins or exposed to viral components (gp120, Tat, Nef) exhibit similar neurological deficits.
  • These deficits include impaired performance in learning and memory tasks (mazes, object recognition) and motor coordination issues.

Purpose of the Study:

  • To investigate the role of corticosterone in HIV-associated neurobehavioral abnormalities.
  • To explore potential mechanisms by which corticosterone influences neurotoxicity.

Main Methods:

  • Review of existing studies on HIV-induced neurobehavioral deficits in animal models.
  • Analysis of evidence linking corticosterone to these deficits and its exacerbation of gp120 neurotoxicity.

Main Results:

  • HIV infection and its proteins induce learning, memory, and motor deficits in animal models.
  • Corticosterone is implicated in exacerbating these behavioral abnormalities.
  • Potential mechanisms involve lipid peroxidation, altered neurotransmitter uptake, calcium signaling, and energy metabolism.

Conclusions:

  • Corticosterone may play a significant role in the neurobehavioral consequences of HIV infection.
  • Understanding corticosterone's impact could inform therapeutic strategies for AIDS dementia complex.