|
2
|
Schmunk G, Boubion BJ, Smith IF, Parker I, Gargus JJ. Shared functional defect in IP₃R-mediated calcium signaling in diverse monogenic autism syndromes. Transl Psychiatry 2015; 5:e643. [PMID: 26393489 PMCID: PMC5068815 DOI: 10.1038/tp.2015.123] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 07/13/2015] [Accepted: 07/27/2015] [Indexed: 01/03/2023] Open
Abstract
Autism spectrum disorder (ASD) affects 2% of children, and is characterized by impaired social and communication skills together with repetitive, stereotypic behavior. The pathophysiology of ASD is complex due to genetic and environmental heterogeneity, complicating the development of therapies and making diagnosis challenging. Growing genetic evidence supports a role of disrupted Ca(2+) signaling in ASD. Here, we report that patient-derived fibroblasts from three monogenic models of ASD-fragile X and tuberous sclerosis TSC1 and TSC2 syndromes-display depressed Ca(2+) release through inositol trisphosphate receptors (IP3Rs). This was apparent in Ca(2+) signals evoked by G protein-coupled receptors and by photoreleased IP3 at the levels of both global and local elementary Ca(2+) events, suggesting fundamental defects in IP3R channel activity in ASD. Given the ubiquitous involvement of IP3R-mediated Ca(2+) signaling in neuronal excitability, synaptic plasticity, gene expression and neurodevelopment, we propose dysregulated IP3R signaling as a nexus where genes altered in ASD converge to exert their deleterious effect. These findings highlight potential pharmaceutical targets, and identify Ca(2+) screening in skin fibroblasts as a promising technique for early detection of individuals susceptible to ASD.
Collapse
Affiliation(s)
- G Schmunk
- Department of Physiology and Biophysics, School of Medicine, University of California, Irvine, CA, USA,Center for Autism Research and Translation, University of California, Irvine, CA, USA
| | - B J Boubion
- Department of Molecular Biology and Biochemistry, School of Biological Sciences, University of California, Irvine, CA, USA
| | - I F Smith
- Center for Autism Research and Translation, University of California, Irvine, CA, USA,Department of Neurobiology and Behavior, School of Biological Sciences, University of California, Irvine, CA, USA
| | - I Parker
- Department of Physiology and Biophysics, School of Medicine, University of California, Irvine, CA, USA,Center for Autism Research and Translation, University of California, Irvine, CA, USA,Department of Neurobiology and Behavior, School of Biological Sciences, University of California, Irvine, CA, USA
| | - J J Gargus
- Department of Physiology and Biophysics, School of Medicine, University of California, Irvine, CA, USA,Center for Autism Research and Translation, University of California, Irvine, CA, USA,Division of Human Genetics & Genomics, Department of Pediatrics, School of Medicine, University of California, Irvine, CA, USA,Department of Physiology and Biophysics, School of Medicine, University of California, 2056 Hewitt Hall, 843 Health Sciences Road, Irvine, CA 92697-3940, USA. E-mail:
| |
Collapse
|
|
3
|
Perrot JL, Cinotti E, Labeille B, Cambazard F. [In vivo confocal microscopy for the diagnosis of lysosomal storage diseases]. Ann Dermatol Venereol 2014; 141:784-5. [PMID: 25433933 DOI: 10.1016/j.annder.2014.09.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2014] [Revised: 06/16/2014] [Accepted: 09/01/2014] [Indexed: 10/24/2022]
Affiliation(s)
- J-L Perrot
- Service de dermatologie, hôpital Nord, CHU de Saint-Étienne, 42055 Saint-Étienne cedex 2, France
| | - E Cinotti
- Service de dermatologie, hôpital Nord, CHU de Saint-Étienne, 42055 Saint-Étienne cedex 2, France.
| | - B Labeille
- Service de dermatologie, hôpital Nord, CHU de Saint-Étienne, 42055 Saint-Étienne cedex 2, France
| | - F Cambazard
- Service de dermatologie, hôpital Nord, CHU de Saint-Étienne, 42055 Saint-Étienne cedex 2, France
| |
Collapse
|