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Ahlers-Dannen KE, Yang J, Spicer MM, Fu D, DeVore A, Fisher RA. A splice acceptor variant in RGS6 associated with intellectual disability, microcephaly, and cataracts disproportionately promotes expression of a subset of RGS6 isoforms. J Hum Genet 2024; 69:145-152. [PMID: 38332109 DOI: 10.1038/s10038-024-01220-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 01/11/2024] [Accepted: 01/18/2024] [Indexed: 02/10/2024]
Abstract
Intellectual disability (ID) is associated with an increased risk of developing psychiatric disorders, suggesting a common underlying genetic factor. Importantly, altered signaling and/or expression of regulator of G protein signaling 6 (RGS6) is associated with ID and numerous psychiatric disorders. RGS6 is highly conserved and undergoes complex alternative mRNA splicing producing ~36 protein isoforms with high sequence similarity historically necessitating a global approach in functional studies. However, our recent analysis in mice revealed RGS6 is most highly expressed in CNS with RGS6L(+GGL) isoforms predominating. A previously reported genetic variant in intron 17 of RGS6 (c.1369-1G>C), associated with ID, may provide further clues into RGS6L(+GGL) isoform functional delineation. This variant was predicted to alter a highly conserved canonical 3' acceptor site creating an alternative branch point within exon 18 (included in a subset of RGS6L(+GGL) transcripts) and a frameshift forming an early stop codon. We previously identified this alternative splice site and demonstrated its use generates RGS6Lζ(+GGL) isoforms. Here, we show that the c.1369-1G>C variant disrupts the canonical, preferred (>90%) intron 17 splice site and leads to the exclusive use of the alternate exon 18 splice site, inducing disproportionate expression of a subset of isoforms, particularly RGS6Lζ(+GGL). Furthermore, RGS6 global knockout mice do not exhibit ID. Thus, ID caused by the c.1369-1G>C variant likely results from altered RGS6 isoform expression, rather than RGS6 isoform loss. In summary, these studies highlight the importance of proper RGS6 splicing and identify a previously unrecognized role of G protein signaling in ID.
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Affiliation(s)
- K E Ahlers-Dannen
- Department of Neuroscience and Pharmacology, The Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA
| | - J Yang
- Department of Neuroscience and Pharmacology, The Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA
| | - M M Spicer
- Department of Neuroscience and Pharmacology, The Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA
| | - D Fu
- Department of Neuroscience and Pharmacology, The Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA
| | - A DeVore
- Department of Neuroscience and Pharmacology, The Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA
| | - R A Fisher
- Department of Neuroscience and Pharmacology, The Roy J and Lucille A Carver College of Medicine, University of Iowa, Iowa City, IA, 52242, USA.
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Han J, Moayedi Y, Truby L, Foroutan F, Bofarull JG, Saha S, Angleitner P, Sabatino M, Henricksen E, Luikart H, van Zyl J, Tremblay-Gravel M, Noly P, Segovia-Cubero J, Alesina ER, Potena L, Takeda K, Felius J, Clarke B, DeVore A, Kim G, Miller R, Zuckermann A, Farr M, Crespo-Leiro M, Hall S, Torres MF, Fan C, Ross H, Khush K, Chih S. Incidence and Predictors of Vasoplegia after Heart Transplantation: Results from the International PGD Consortium. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Stehlik J, Schroder J, Pinney S, Patel C, D'Alessandro D, Goldstein D, Jorde U, Patel S, Mani D, Esmailian F, Kobashigawa J, Takeda K, Uriel N, Pham S, Patel P, Kai M, Sun B, Shah A, Ono M, Couper G, DeNofrio D, Vest A, Joyce D, DeVore A, Mallidi H, Itoh A, Mehra M, Givertz M, Milano C, Farr M. First Report of the Transmedics Organ Care System Heart Perfusion Registry. A Multi-Institutional Outcomes Analysis. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Milano C, Schroder J, Farr M, DeVore A, D'Alessandro D, Goldstein D, Jorde U, Patel S, Daneshmand M, Pinney S, Esmailian F, Kobashigawa J, Takeda K, Uriel N, Pham S, Patel P, Kai M, Sun B, Shah A, Ono M, Couper G, DeNofrio D, Vest A, Joyce D, Mallidi H, Itoh A, Mehra M, Givertz M, Patel C, Stehlik J. Demographics and Outcomes of Clinical Trial vs Initial Post-Approval Use of Transmedics Organ Care System Heart. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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Schroder J, Shah A, Anyanwu A, D'Alessandro D, Streuber M, Mudy K, Shudo Y, Esmailian F, Liao K, Pagani F, Silvestry S, Wang I, Gananpathi A, Salerno C, Patel C, DeVore A, Koomalsingh K, Absi T, Khaghani A, Milano C, Smith J. Increasing Utilization of Extended Criteria Donor After Brain Death (DBD) Hearts Seldomly Used for Transplantation in the U.S. Due to Limitation of Ischemic Cold Storage - 2-Year Results of the OCS Heart EXPAND Prospective Multi-Center Trial (OCS Heart EXPAND). J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Schroder J, Shah A, Pretorius V, Smith J, Daneshmand M, Geirsson A, Pham S, Um J, Silvestry S, Shaffer A, Mudy K, Kai M, Joyce D, Philpott J, Takeda K, Goldstein D, Shudo Y, Couper G, Mallidi H, Esmailian F, Pham D, Salerno C, Lozonschi L, Quader M, Patel C, DeVore A, Bryner B, Madsen J, Absi T, Milano C, D'Alessandro D. Expanding Heart Transplants from Donors After Circulatory Death (DCD) - Results of the First Randomized Controlled Trial Using the Organ Care System (OCS™) Heart - (OCS DCD Heart Trial). J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.165] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Truby L, Moayedi Y, Foroutan F, Han J, Guzman J, Farrero M, Zafar H, Felius J, van Zyl J, Hall S, Law D, Chih S, Angleitner P, Sabatino M, DeVore A, Miller R, Potena L, Zuckermann A, Ross H, Khush K, Farr M. Bridge to Transplant with Durable Left Ventricular Assist Device is Associated with Primary Graft Dysfunction Following Heart Transplantation: A Report from the International Consortium on Primary Graft Dysfunction. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Song W, Chen Q, Patel C, Yang Q, Wang L, Hanshew W, DeVore A, Schroder J, Milano C, Rogers J, Holley C, Chen D. Pre-Formed Donor-Specific Antibodies Impact Long Term Survival of Heart Transplants. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.1173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Ambardekar A, Thibodeau J, DeVore A, Kittleson M, Forde-McLean R, Palardy M, Mountis M, Cadaret L, Teuteberg J, Pamboukian S, Stevenson L, Xie R, Stewart G. Slow Gait Speed Linked to More Severe Disease but Not with Early Events in Ambulatory Advanced Heart Failure: Results from the Medical Arm of Mechanically Assisted Circulatory Support (MedaMACS) Registry. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Ambardekar V, Kittleson M, Palardy M, Mountis M, Forde-McLean R, DeVore A, Pamboukian S, Thibodeau J, Teuteberg J, Cadaret L, Xie R, Stevenson L, Stewart G. Advanced Therapy Utilization and Survival in Ambulatory Patients with Advanced Heart Failure: Results from the Medical Arm of Mechanically Assisted Circulatory Support (MedaMACS) Registry. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.508] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Stewart G, Ambardekar A, Kittleson M, Palardy M, DeVore A, Thibodeau J, Teuteberg J, Cadaret L, Forde-McLean R, Mountis M, Pamboukian S, Cantor R, Xie R, Stevenson L. A Novel Combined Endpoint Integrating Quality of Life Can Inform Decisions about VAD in Ambulatory Advanced Heart Failure. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.1075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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