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Related Concept Videos

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[Microglia-mediated cognitive impairment induced by methamphetamine].

Naotaka Izuo1,2, Yuka Kusui1,3, Atsumi Nitta1

  • 1Department of Pharmaceutical Therapy and Neuropharmacology, Faculty of Pharmaceutical Sciences, University of Toyama.

Nihon Yakurigaku Zasshi. Folia Pharmacologica Japonica
|August 31, 2025
PubMed
Summary
This summary is machine-generated.

Methamphetamine (METH) use causes cognitive deficits by activating microglia, leading to synaptic pruning. Suppressing this microglial activation with minocycline restored cognitive function in a mouse model.

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Area of Science:

  • Neuroscience
  • Neuroinflammation
  • Neuropharmacology

Background:

  • Chronic methamphetamine (METH) use is linked to cognitive deficits and brain structural changes.
  • Neuroinflammation, indicated by glial activation, co-occurs with morphological damage in METH users.
  • Microglial activation and complement signaling are implicated in neurodegenerative and psychiatric disorders.

Purpose of the Study:

  • To investigate the causal link between METH, neuroinflammation, and cognitive dysfunction.
  • To explore the role of microglial activation and complement signaling in METH-induced cognitive impairment.
  • To identify potential therapeutic targets for METH-related cognitive deficits.

Main Methods:

  • Developed a mouse model with nucleus accumbens micro-infusion of low-dose METH.
  • Assessed cognitive function, hippocampal long-term potentiation, and microglial activation markers (IL-1β, C1q).
  • Administered minocycline to suppress microglial activation and evaluated its effects.

Main Results:

  • METH-infused mice exhibited cognitive deficits and impaired hippocampal long-term potentiation.
  • These mice showed increased microglial activation and elevated IL-1β and C1q mRNA levels.
  • Minocycline treatment normalized these molecular markers and restored cognitive function.

Conclusions:

  • METH-induced cognitive impairment is mediated by abnormal microglial pruning via complement signaling.
  • Targeting microglial activation presents a promising therapeutic strategy for METH-related cognitive dysfunction.
  • This study provides a preclinical basis for developing novel treatments for stimulant use disorder.