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Article

Novel CC2D2A compound heterozygous mutations cause Joubert syndrome

  • Authors:
    • Daimin Xiao
    • Chunli Lv
    • Zhimin Zhang
    • Mingsong Wu
    • Xiang Zheng
    • Lei Yang
    • Xueying Li
    • Guan Wu
    • Jindong Chen
  • View Affiliations / Copyright

    Affiliations: Clinical Laboratory, Zunyi Medical University Affiliated Hospital, Zunyi, Guizhou 563099, P.R. China, Department of Genetics, Zunyi Medical University, Zunyi, Guizhou 563099, P.R. China, Department of Urology, University of Rochester Medical Center, Rochester, NY 14642, USA
  • Pages: 305-308
    |
    Published online on: December 7, 2016
       https://doi.org/10.3892/mmr.2016.6007
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Abstract

Joubert syndrome (JS) is an autosomal recessive disorder, which is characterized by hypotonia, ataxia, psychomotor delay, and variable occurrences of oculomotor apraxia and neonatal breathing abnormalities. JS is clinically and genetically heterogeneous. The present study investigated a typical JS family. The ‘molar tooth sign’ was observed in the proband through magnetic resonance imaging. Other symptoms of JS include cerebellar vermis hypoplasia/dysplasia, oculomotor apraxia and intellectual disability. High‑throughput sequencing revealed that JS was caused by coiled‑coil and C2 domain containing 2A (CC2D2A) compound heterozygous mutations. One CC2D2A allele was affected with a missense mutation, c.2581G>A, which led to a p.Asp861Asn amino acid replacement. The other allele was affected with a c.2848C>T nonsense mutation, which resulted in a truncated CC2D2A protein (p.Arg950Ter). Both of these alterations are novel. Further investigation indicated that the proband's father was the c.2581G>A carrier, whereas the mother was the c.2848C>T carrier. These results indicated that JS in the proband was caused by novel compound heterozygous mutations in CC2D2A, which were inherited from both parents. These findings may be used to establish prenatal molecular diagnostic criteria, which may be beneficial in future pregnancies.
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Copy and paste a formatted citation
Spandidos Publications style
Xiao D, Lv C, Zhang Z, Wu M, Zheng X, Yang L, Li X, Wu G and Chen J: Novel CC2D2A compound heterozygous mutations cause Joubert syndrome. Mol Med Rep 15: 305-308, 2017.
APA
Xiao, D., Lv, C., Zhang, Z., Wu, M., Zheng, X., Yang, L. ... Chen, J. (2017). Novel CC2D2A compound heterozygous mutations cause Joubert syndrome. Molecular Medicine Reports, 15, 305-308. https://doi.org/10.3892/mmr.2016.6007
MLA
Xiao, D., Lv, C., Zhang, Z., Wu, M., Zheng, X., Yang, L., Li, X., Wu, G., Chen, J."Novel CC2D2A compound heterozygous mutations cause Joubert syndrome". Molecular Medicine Reports 15.1 (2017): 305-308.
Chicago
Xiao, D., Lv, C., Zhang, Z., Wu, M., Zheng, X., Yang, L., Li, X., Wu, G., Chen, J."Novel CC2D2A compound heterozygous mutations cause Joubert syndrome". Molecular Medicine Reports 15, no. 1 (2017): 305-308. https://doi.org/10.3892/mmr.2016.6007
Copy and paste a formatted citation
x
Spandidos Publications style
Xiao D, Lv C, Zhang Z, Wu M, Zheng X, Yang L, Li X, Wu G and Chen J: Novel CC2D2A compound heterozygous mutations cause Joubert syndrome. Mol Med Rep 15: 305-308, 2017.
APA
Xiao, D., Lv, C., Zhang, Z., Wu, M., Zheng, X., Yang, L. ... Chen, J. (2017). Novel CC2D2A compound heterozygous mutations cause Joubert syndrome. Molecular Medicine Reports, 15, 305-308. https://doi.org/10.3892/mmr.2016.6007
MLA
Xiao, D., Lv, C., Zhang, Z., Wu, M., Zheng, X., Yang, L., Li, X., Wu, G., Chen, J."Novel CC2D2A compound heterozygous mutations cause Joubert syndrome". Molecular Medicine Reports 15.1 (2017): 305-308.
Chicago
Xiao, D., Lv, C., Zhang, Z., Wu, M., Zheng, X., Yang, L., Li, X., Wu, G., Chen, J."Novel CC2D2A compound heterozygous mutations cause Joubert syndrome". Molecular Medicine Reports 15, no. 1 (2017): 305-308. https://doi.org/10.3892/mmr.2016.6007
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