Differential Responses of LINE-1 in the Dentate Gyrus, Striatum and Prefrontal Cortex to Chronic Neurotoxic Methamphetamine: A Study in Rat Brain
Overview
Authors
Affiliations
Methamphetamine (METH) is a widely abused psychostimulant with the potential to cause a broad range of severe cognitive deficits as well as neurobehavioral abnormalities when abused chronically, particularly at high doses. Cognitive deficits are related to METH neurotoxicity in the striatum and hippocampus. The activation of transposable Long INterspersed Nuclear Element 1 (LINE-1) is associated with several neurological diseases and drug abuse, but there are very limited data regarding the effects of high-dose METH on the activity of LINE-1 in the adult brain. Using real-time quantitative PCR, the present study demonstrates that the chronic administration of neurotoxic METH doses results in the increased expression of LINE-1-encoded Open Reading Frame 1 (ORF-1) in rat striatum shortly after the last dose of the drug and decreased ORF-1 expression during METH withdrawal, with dentate gyrus potentially developing "tolerance" to these METH effects. LINE-1 activation may be a new factor mediating the neurotoxic effects of chronic METH in the striatum and, therefore, a new drug target against METH-induced psychomotor impairments in chronic METH users.
An update: epigenetic mechanisms underlying methamphetamine addiction.
Liu M, Si Z Front Cell Dev Biol. 2024; 12:1494557.
PMID: 39650725 PMC: 11621221. DOI: 10.3389/fcell.2024.1494557.
Interchromosomal translocation in neural progenitor cells exposed to L1 retrotransposition.
Muotri A Genet Mol Biol. 2023; 46(1):e20220268.
PMID: 36734369 PMC: 9936793. DOI: 10.1590/1678-4685-GMB-2022-0268.
Convergent actions of stress and stimulants via epigenetic regulation of neural circuitry.
Murphy M, Heller E Trends Neurosci. 2022; 45(12):955-967.
PMID: 36280459 PMC: 9671852. DOI: 10.1016/j.tins.2022.10.001.
Role of Transposable Elements in Genome Stability: Implications for Health and Disease.
Bhat A, Ghatage T, Bhan S, Lahane G, Dhar A, Kumar R Int J Mol Sci. 2022; 23(14).
PMID: 35887150 PMC: 9319628. DOI: 10.3390/ijms23147802.