Lithium ameliorates HIV-gp120-mediated neurotoxicity

Mol Cell Neurosci. 2002 Nov;21(3):493-501. doi: 10.1006/mcne.2002.1196.

Abstract

To investigate the protective effects of lithium against HIV-gp120-mediated toxicity in vivo, mice were exposed to lithium and gp120 and levels of the neuronal markers, microtubule-associated protein-2 and NeuN, and the astrocyte marker, glial fibrillary acidic protein, were determined. In addition, SH-SY5Y neuronal cells exposed to gp120 and lithium were assessed for cell viability. Lithium pretreatment protected the hippocampus of mice from gp120-mediated toxicity. Similarly, preexposure of neuronal cultures to lithium significantly reduced gp120-associated neurotoxicity. However, posttreatment with lithium had minimal neuroprotective effects against gp120, both in vivo and in vitro. The protective effects of lithium in vitro were blocked by LY294002, an inhibitor of the phosphatidylinositol 3-kinase/Akt pathway. Taken together, these results demonstrate that lithium might be neuroprotective against gp120-mediated toxicity and suggest that prophylactic treatment with lithium may prevent the onset/progression of HIV-associated cognitive impairments.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • AIDS Dementia Complex / drug therapy*
  • AIDS Dementia Complex / metabolism
  • AIDS Dementia Complex / physiopathology
  • Animals
  • Cell Survival / drug effects
  • Cells, Cultured
  • Dendrites / drug effects
  • Dendrites / pathology
  • Glycogen Synthase Kinase 3 / antagonists & inhibitors
  • Glycogen Synthase Kinase 3 / metabolism
  • Glycogen Synthase Kinase 3 beta
  • HIV Envelope Protein gp120 / drug effects*
  • HIV Envelope Protein gp120 / toxicity
  • Hippocampus / drug effects*
  • Hippocampus / physiopathology
  • Hippocampus / virology
  • Lithium / pharmacology*
  • Lithium / therapeutic use
  • Mice
  • Mice, Inbred C57BL
  • Nerve Degeneration / chemically induced
  • Nerve Degeneration / drug therapy
  • Nerve Degeneration / virology
  • Neurons / drug effects*
  • Neurons / virology
  • Neuroprotective Agents / pharmacology*
  • Neuroprotective Agents / therapeutic use
  • Neurotoxins / antagonists & inhibitors*
  • Neurotoxins / toxicity
  • Pyramidal Cells / drug effects
  • Pyramidal Cells / pathology
  • Treatment Outcome

Substances

  • HIV Envelope Protein gp120
  • Neuroprotective Agents
  • Neurotoxins
  • Lithium
  • Glycogen Synthase Kinase 3 beta
  • Glycogen Synthase Kinase 3