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Gandal MJ, Sisti J, Klook K, Ortinski PI, Leitman V, Liang Y, Thieu T, Anderson R, Pierce RC, Jonak G, Gur RE, Carlson G, Siegel SJ. GABAB-mediated rescue of altered excitatory-inhibitory balance, gamma synchrony and behavioral deficits following constitutive NMDAR-hypofunction. Transl Psychiatry 2012; 2:e142. [PMID: 22806213 PMCID: PMC3410621 DOI: 10.1038/tp.2012.69] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Reduced N-methyl-D-aspartate-receptor (NMDAR) signaling has been associated with schizophrenia, autism and intellectual disability. NMDAR-hypofunction is thought to contribute to social, cognitive and gamma (30-80 Hz) oscillatory abnormalities, phenotypes common to these disorders. However, circuit-level mechanisms underlying such deficits remain unclear. This study investigated the relationship between gamma synchrony, excitatory-inhibitory (E/I) signaling, and behavioral phenotypes in NMDA-NR1(neo-/-) mice, which have constitutively reduced expression of the obligate NR1 subunit to model disrupted developmental NMDAR function. Constitutive NMDAR-hypofunction caused a loss of E/I balance, with an increase in intrinsic pyramidal cell excitability and a selective disruption of parvalbumin-expressing interneurons. Disrupted E/I coupling was associated with deficits in auditory-evoked gamma signal-to-noise ratio (SNR). Gamma-band abnormalities predicted deficits in spatial working memory and social preference, linking cellular changes in E/I signaling to target behaviors. The GABA(B)-receptor agonist baclofen improved E/I balance, gamma-SNR and broadly reversed behavioral deficits. These data demonstrate a clinically relevant, highly translatable neural-activity-based biomarker for preclinical screening and therapeutic development across a broad range of disorders that share common endophenotypes and disrupted NMDA-receptor signaling.
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Affiliation(s)
- M J Gandal
- Translational Neuroscience Program, Department of Psychiatry, University of Pennsylvania, Philadelphia, PA, USA
| | - J Sisti
- Translational Neuroscience Program, Department of Psychiatry, University of Pennsylvania, Philadelphia, PA, USA
| | - K Klook
- Translational Neuroscience Program, Department of Psychiatry, University of Pennsylvania, Philadelphia, PA, USA,Department of Psychiatry and Psychotherapy, RWTH Aachen University, Aachen, Germany
| | - P I Ortinski
- Center for Neurobiology and Behavior, Department of Psychiatry, University of Pennsylvania, Philadelphia, PA, USA
| | - V Leitman
- Translational Neuroscience Program, Department of Psychiatry, University of Pennsylvania, Philadelphia, PA, USA
| | - Y Liang
- Translational Neuroscience Program, Department of Psychiatry, University of Pennsylvania, Philadelphia, PA, USA
| | - T Thieu
- Translational Neuroscience Program, Department of Psychiatry, University of Pennsylvania, Philadelphia, PA, USA
| | - R Anderson
- Translational Neuroscience Program, Department of Psychiatry, University of Pennsylvania, Philadelphia, PA, USA
| | - R C Pierce
- Center for Neurobiology and Behavior, Department of Psychiatry, University of Pennsylvania, Philadelphia, PA, USA
| | - G Jonak
- Translational Neuroscience Program, Department of Psychiatry, University of Pennsylvania, Philadelphia, PA, USA
| | - R E Gur
- Neuropsychiatry Program, Department of Psychiatry, University of Pennsylvania, Philadelphia, PA, USA
| | - G Carlson
- Center for Neurobiology and Behavior, Department of Psychiatry, University of Pennsylvania, Philadelphia, PA, USA
| | - S J Siegel
- Translational Neuroscience Program, Department of Psychiatry, University of Pennsylvania, Philadelphia, PA, USA,Director, Translational Neuroscience Program, Department of Psychiatry, University of Pennsylvania, Translational Research Laboratories, 125 S. 31st Street, Philadelphia, PA 19104, USA. E-mail: or
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