Cited by 75Ion channel regulation and functionCraniofacial Disorders and TreatmentsDevelopmental Biology and Gene Regulation

Calcium influx through L-type CaV1.2 Ca2+ channels regulates mandibular development

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Ramachandran, Kapil V., Hennessey, Jessica A., Barnett, Adam S., Yin, Xinhe, Stadt, Harriett A., Foster, Erika, Shah, Raj A., Yazawa, Masayuki +3 more·2013·Journal of Clinical Investigation

Abstract

The identification of a gain-of-function mutation in CACNA1C as the cause of Timothy Syndrome (TS), a rare disorder characterized by cardiac arrhythmias and syndactyly, highlighted unexpected roles for the L-type voltage-gated Ca2+ channel CaV1.2 in nonexcitable cells. How abnormal Ca2+ influx through CaV1.2 underlies phenotypes such as the accompanying syndactyly or craniofacial abnormalities in the majority of affected individuals is not readily explained by established CaV1.2 roles. Here, we show that CaV1.2 is expressed in the first and second pharyngeal arches within the subset of cells that give rise to jaw primordia. Gain-of-function and loss-of-function studies in mouse, in concert with knockdown/rescue and pharmacological approaches in zebrafish, demonstrated that Ca2+ influx through CaV1.2 regulates jaw development. Cranial neural crest migration was unaffected by CaV1.2 knockdown, suggesting a role for CaV1.2 later in development. Focusing on the mandible, we observed that cellular hypertrophy and hyperplasia depended upon Ca2+ signals through CaV1.2, including those that activated the calcineurin signaling pathway. Together, these results provide new insights into the role of voltage-gated Ca2+ channels in nonexcitable cells during development.

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  • Timothy Syndrome-causing point mutations in CACNA1C disrupt development of neuronal dendrites, bone, and skin, and also affect ongoing electrical function in heart and brain.

    “For example, point mutations in CACNA1C that underlie Timothy Syndrome perturb the development of neuronal dendrites (Krey and Dolmetsch, 2007), bones (Ramachandran et al., 2013), and skin (Yucel et al., 2013), as well as ongoing electrophysiological function of heart and brain (Krey and Dolmetsch, 2007; Splawski et al., 2005; Splawski et al., 2004).”

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Authors
Ramachandran, K. V., Hennessey, J. A., Barnett, A. S., Yin, X., Stadt, H. A., Foster, E., Shah, R. A., Yazawa, M., Dolmetsch, R. E., Kirby, M. L., & Pitt, G. S.
Affiliations
  • Duke Medical Center (US)
  • Duke University (US)
  • Stanford Medicine (US)
Corresponding author
Pitt, Geoffrey S.
Venue
Journal of Clinical Investigation
Published
2013-03-15
Volume
123
Issue
4
Pages
1638-1646
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2123350196
Cited by
75
References
33
Citations by year
2026: 4 · 2025: 1 · 2024: 4 · 2023: 8 · 2022: 6 · 2021: 11 · 2020: 10 · 2019: 5 · 2018: 5 · 2017: 3 · 2016: 5 · 2015: 10 · 2014: 3
FWCI
2.67
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • March of Dimes Foundation
  • American Heart Association
  • University of Pittsburgh
  • National Heart, Lung, and Blood Institute (T32HL007101, R01HL071165)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion channel regulation and function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Craniofacial Disorders and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
Keywords
CACNA1C, Timothy syndrome, mandibular growth, branchial arches, craniofacial anomalies, syndactyly, calcium influx, calcineurin signaling, cell hypertrophy, non-excitable cells
MeSH terms
Animals, Autistic Disorder, Branchial Region, Cell Movement, Cells, Cultured, Embryo, Mammalian, Embryo, Nonmammalian, Heart, Humans, Hyperplasia, Hypertrophy, Long QT Syndrome, Mandible, Mice, Inbred C57BL, Neural Crest, Stem Cells, Syndactyly, Zebrafish, Gene Expression, Calcineurin, Calcium Signaling, Mutation, Missense, Calcium Channels, L-Type, Zebrafish Proteins, Mice, Gene Knockdown Techniques, Mice, 129 Strain, Morpholinos

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