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Author Notes:

Corresponding Author: Victor Faundez Email: vfaunde@emory.edu Jennifer Larimore Email: jlarimore@agnesscott.edu

JL, SZ: collected data and edited paper.

MA, KS, RC, HR, MB, AS, CG, EW: collected data.

VF: designed project, analyzed data, designed figures, wrote the paper.

We are indebted to the Faundez lab members and Dr. Peter Wenner for their comments.

This study was carried out in accordance with the recommendations of Emory IUCAC. The protocol was approved by the IUCAC.

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

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Research Funding:

This work was supported by grants from the National Institutes of Health NS088503 and the Emory School of Medicine Catalyst Grant to VF.

Keywords:

  • dysbindin
  • GABA
  • parvalbumin
  • BLOC-1
  • Neurodevelopmental disorders

Dysbindin Deficiency Modifies the Expression of GABA Neuron and Ion Permeation Transcripts in the Developing Hippocampus

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Journal Title:

Frontiers in Genetics

Volume:

Volume 8

Publisher:

Type of Work:

Article | Final Publisher PDF

Abstract:

The neurodevelopmental factor dysbindin is required for synapse function and GABA interneuron development. Dysbindin protein levels are reduced in the hippocampus of schizophrenia patients. Mouse dysbindin genetic defects and other mouse models of neurodevelopmental disorders share defective GABAergic neurotransmission and, in several instances, a loss of parvalbumin-positive interneuron phenotypes. This suggests that mechanisms downstream of dysbindin deficiency, such as those affecting GABA interneurons, could inform pathways contributing to or ameliorating diverse neurodevelopmental disorders. Here we define the transcriptome of developing wild type and dysbindin null Bloc1s8sdy/sdy mouse hippocampus in order to identify mechanisms downstream dysbindin defects. The dysbindin mutant transcriptome revealed previously reported GABA parvalbumin interneuron defects. However, the Bloc1s8sdy/sdy transcriptome additionally uncovered changes in the expression of molecules controlling cellular excitability such as the cation-chloride cotransporters NKCC1, KCC2, and NCKX2 as well as the potassium channel subunits Kcne2 and Kcnj13. Our results suggest that dysbindin deficiency phenotypes, such as GABAergic defects, are modulated by the expression of molecules controlling the magnitude and cadence of neuronal excitability.

Copyright information:

© 2017 Larimore, Zlatic, Arnold, Singleton, Cross, Rudolph, Bruegge, Sweetman, Garza, Whisnant and Faundez.

This is an Open Access work distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/).
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