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Zhonghua Yi Xue Yi Chuan Xue Za Zhi. 2013 Jun;30(3):266-9. doi: 10.3760/cma.j.issn.1003-9406.2013.03.003.

[Mutation analysis of CRYBB1 gene and prenatal diagnosis for a Chinese kindred featuring autosomal dominant congenital nuclear cataract].

[Article in Chinese]

Author information

  • 1Center of Prenatal Diagnosis, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China.



To perform mutation screening and prenatal diagnosis for a five-generation Chinese pedigree with autosomal dominant congenital nuclear cataract from Henan province by DNA sequencing.


Blood samples were taken from the family members. Four candidate genes (CRYBA1/A3, CRYBB1, CRYBB2 and CRYGD) were screened for mutations using direct sequencing. Prenatal genetic diagnosis was provided for a fetus at early gestation through chorionic villus sampling.


A missense mutation, c.387C to A, was detected in exon 4 of the CRYBB1 gene in all of the patients. The mutation has resulted in a p.S129R transversion. The same mutation was not found in the fetus of the proband, who was confirmed to be healthy by one-year follow-up.


A missense mutation p.S129R of the CRYBB1 gene probably underlies the autosomal dominant congenital nuclear cataract in this pedigree. Detection of the mutation also facilitated prenatal genetic testing for the family.

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