Effect of Methamphetamine Exposure on Expression of Calcium Binding Proteins in Rat Frontal Cortex and Hippocampus

VEERASAKUL, Siriluk, THANOI, Samur, REYNOLDS, Gavin and NUDMAMUD-THANOI, Sutisa (2016). Effect of Methamphetamine Exposure on Expression of Calcium Binding Proteins in Rat Frontal Cortex and Hippocampus. Neurotoxicity Research. (In Press)

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Official URL: http://link.springer.com/article/10.1007/s12640-01...
Link to published version:: 10.1007/s12640-016-9628-2

Abstract

Methamphetamine (METH) is a psychostimulant drug with potent effects on the central nervous system that can cause psychotic symptoms similar to those of schizophrenia. Specific alterations in GABAergic neuronal markers have been reported in schizophrenia and animal models of psychotic illness. The aim of this study was to determine whether there are changes in subpopulations of GABAergic neurons, defined by the presence of calcium binding proteins (CBPs), in animal models of METH abuse. Rats received acute (Binge) doses of 4 × 6 mg/kg, a chronic escalating dose regime (0.1–4 mg/kg over 14 days) or a combination of the two and were compared with a vehicle-administered control group. Brains were taken and sections of frontal cortex (Cg1) and hippocampus (dentate gyrus and CA1-3 regions) underwent immunostaining for three CBPs [parvalbumin (PV), calbindin (CB), and calretinin (CR)]. Significant decreases in PV-immunoreactive (IR) neurons in each METH group and all regions were observed. Smaller METH-induced deficits in CB–IR cells were observed, reaching significance primarily following chronic METH regimes, while CR–IR was significantly reduced only in frontal cortex following chronic administration. These results suggest that METH regimes in rats can induce selective deficits in GABAergic neuronal subtypes similar to those seen in schizophrenia and may underlie the psychosis and/or cognitive impairment that can occur in METH abuse and dependence.

Item Type: Article
Research Institute, Centre or Group: Biomolecular Sciences Research Centre
Identification Number: 10.1007/s12640-016-9628-2
Depositing User: Carmel House
Date Deposited: 22 Aug 2016 10:42
Last Modified: 22 Aug 2016 10:42
URI: http://shura.shu.ac.uk/id/eprint/13264

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