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https://hdl.handle.net/2440/132781
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Type: | Journal article |
Title: | Interaction of Brain-Derived Neurotrophic Factor Val66Met genotype and history of stress in regulation of prepulse inhibition in mice |
Author: | van den Buuse, M. Lee, J.J.W. Jaehne, E.J. |
Citation: | Schizophrenia Research, 2018; 198:60-67 |
Publisher: | Elsevier |
Issue Date: | 2018 |
ISSN: | 0920-9964 1573-2509 |
Statement of Responsibility: | Maarten van den Buuse, John Juan Wen Lee, Emily J. Jaehne |
Abstract: | The Brain-Derived Neurotrophic Factor (BDNF) Val66Met polymorphism results in reduced activity-dependent BDNF release and has been implicated in schizophrenia. However, effects of the polymorphism on functional dopaminergic and N-methyl-d-aspartate (NMDA) receptor-associated activity remain unclear. We used prepulse inhibition, a measure of sensorimotor gating which is disrupted in schizophrenia, and assessed the effects of acute treatment with the dopamine receptor agonist, apomorphine (APO), and the NMDA receptor antagonist, MK-801. We used adult humanized hBDNF(Vall66Met) 'knockin' mice which express either the Val/Val, Val/Met or Met/Met genotype. An interaction of BDNF with stress was modelled by chronic young-adult treatment with corticosterone (CORT). At 1 or 3mg/kg, APO had no effect in Val/Val mice but significantly reduced PPI at the 100ms inter-stimulus interval (ISI) in Val/Met and Met/Met mice. However, after CORT pretreatment, APO significantly reduced PPI in all genotypes similarly. At 0.1 or 0.25mg/kg, MK-801 significantly disrupted PPI at the 100ms ISI independent of genotype or CORT pretreatment. There were differential effects of APO and MK-801 on PPI at the 30ms ISI and startle between the genotypes, irrespective of CORT pretreatment. These results show that the BDNF Val66Met Val/Met and Met/Met genotypes are more sensitive than the Val/Val genotype to the effect of APO on PPI. A history of stress, here modelled by chronic CORT administration, increases effects of APO in Val/Val mice. |
Keywords: | Animals Mice, Inbred C57BL Mice, Transgenic Humans Mice Disease Models, Animal Apomorphine Dizocilpine Maleate Corticosterone Brain-Derived Neurotrophic Factor Valine Methionine Dopamine Agonists Excitatory Amino Acid Antagonists Acoustic Stimulation Analysis of Variance Stress, Psychological Dose-Response Relationship, Drug Genotype Polymorphism, Genetic Prepulse Inhibition |
Rights: | © 2017 Elsevier B.V. All rights reserved. |
DOI: | 10.1016/j.schres.2017.08.019 |
Grant ID: | NHMRC |
Published version: | http://dx.doi.org/10.1016/j.schres.2017.08.019 |
Appears in Collections: | Medicine publications |
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