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APC c.4621C>T variant causing Gardner's syndrome in a Han Chinese family may be inherited through maternal mosaicism

  • Authors:
    • Decheng Cai
    • Fei He
    • Xiangmin Xu
    • Fu Xiong
    • Leitao Zhang
  • View Affiliations / Copyright

    Affiliations: Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China, Department of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
    Copyright: © Cai et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Article Number: 488
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    Published online on: March 16, 2021
       https://doi.org/10.3892/etm.2021.9919
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Abstract

Gardner's syndrome is a rare autosomal dominant hereditary disease that is characterized by multiple colorectal polyps combined with extra‑colonic presentation (such as osteoma or desmoid tumors) of familial adenomatous polyposis syndrome. Gardner's syndrome is caused by the mutation of the adenomatous polyposis coli (APC) gene, which is located at 5q21. The aim of the current study was to investigate the APC gene mutations present in a Han Chinese family diagnosed with Gardner's syndrome. The 38‑year‑old proband presented with clinical symptoms, and was later diagnosed with Gardner's syndrome. Genomic DNA was extracted from the peripheral venous blood of 150 normal controls as well as the family members of the proband. Analysis of the respective APC gene sequences was performed using PCR amplification and Sanger sequencing. Pathogenesis associated with the APC mutation was investigated using reverse‑transcription quantitative PCR and determined through bioinformatics approaches. Haplotype analysis was performed to identify the genetic source of the mutation(s). In the initial screening for APC variants, the APC c.4621C>T variant was detected in the proband and his son, but was not detected in the proband's affected mother. The mRNA expression changed significantly according to age and the presence of the mutation in the blood of the patients. Haplotype analysis suggested the presence of maternal mosaicism for this mutation. Haplotype analysis revealed that the APC c.4621C>T variant in a patient with Gardner's syndrome was most likely derived from his mother through mosaicism. These results indicate the necessity to verify the possibility of gonadal mosaicism when a proband diagnosed with Gardner's syndrome appears to exhibit a de novo mutation.
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Copy and paste a formatted citation
Spandidos Publications style
Cai D, He F, Xu X, Xiong F and Zhang L: <em>APC</em> c.4621C&gt;T variant causing Gardner's syndrome in a Han Chinese family may be inherited through maternal mosaicism. Exp Ther Med 21: 488, 2021.
APA
Cai, D., He, F., Xu, X., Xiong, F., & Zhang, L. (2021). <em>APC</em> c.4621C&gt;T variant causing Gardner's syndrome in a Han Chinese family may be inherited through maternal mosaicism. Experimental and Therapeutic Medicine, 21, 488. https://doi.org/10.3892/etm.2021.9919
MLA
Cai, D., He, F., Xu, X., Xiong, F., Zhang, L."<em>APC</em> c.4621C&gt;T variant causing Gardner's syndrome in a Han Chinese family may be inherited through maternal mosaicism". Experimental and Therapeutic Medicine 21.5 (2021): 488.
Chicago
Cai, D., He, F., Xu, X., Xiong, F., Zhang, L."<em>APC</em> c.4621C&gt;T variant causing Gardner's syndrome in a Han Chinese family may be inherited through maternal mosaicism". Experimental and Therapeutic Medicine 21, no. 5 (2021): 488. https://doi.org/10.3892/etm.2021.9919
Copy and paste a formatted citation
x
Spandidos Publications style
Cai D, He F, Xu X, Xiong F and Zhang L: <em>APC</em> c.4621C&gt;T variant causing Gardner's syndrome in a Han Chinese family may be inherited through maternal mosaicism. Exp Ther Med 21: 488, 2021.
APA
Cai, D., He, F., Xu, X., Xiong, F., & Zhang, L. (2021). <em>APC</em> c.4621C&gt;T variant causing Gardner's syndrome in a Han Chinese family may be inherited through maternal mosaicism. Experimental and Therapeutic Medicine, 21, 488. https://doi.org/10.3892/etm.2021.9919
MLA
Cai, D., He, F., Xu, X., Xiong, F., Zhang, L."<em>APC</em> c.4621C&gt;T variant causing Gardner's syndrome in a Han Chinese family may be inherited through maternal mosaicism". Experimental and Therapeutic Medicine 21.5 (2021): 488.
Chicago
Cai, D., He, F., Xu, X., Xiong, F., Zhang, L."<em>APC</em> c.4621C&gt;T variant causing Gardner's syndrome in a Han Chinese family may be inherited through maternal mosaicism". Experimental and Therapeutic Medicine 21, no. 5 (2021): 488. https://doi.org/10.3892/etm.2021.9919
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