Open Access

Correlation between genotype and phenotype in three families with Peutz‑Jeghers Syndrome

  • Authors:
    • Yanli Zhang
    • Yao Ke
    • Xueni Zheng
    • Qing Liu
    • Xiaohong Duan
  • View Affiliations

  • Published online on: December 16, 2016     https://doi.org/10.3892/etm.2016.3980
  • Pages: 507-514
  • Copyright: © Zhang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Peutz‑Jeghers syndrome (PJS) is a hereditary disorder characterized by mucocutaneous pigmentations, gastrointestinal (GI) polyposis and an increased risk of certain malignancies. Little is known about the causative genes of PJS, or their association with the clinical phenotypes of PJS. The present study reports the results of clinical and genetic analysis of three Chinese families with PJS. In addition, the medical histories and clinical manifestations of these families were compared. DNA was collected from the blood samples of patients with PJS and controls. Serine/threonine kinase 11 (STK11), olfactory receptor family 4 subfamily C member 45 (OR4C45) and zonadhesin (ZAN) were amplified by polymerase chain reaction, and analyzed by sequencing and cloning. Two PJS‑affected members of one family had a de novo single base deletion (NM_000455.4:c.842delC) in the STK11 gene, and their clinical presentations reflected the quantity of mutant STK11 copies in a dose‑dependent manner. No pathogenic variants of OR4C45 or ZAN were found in the patients with PJS, although a new single nucleotide polymorphism (NM_003386.2:c.5768delG) of ZAN was identified. The results of the current study identified that a STK11 mutation dose‑dependent genotype‑phenotype relationship exists in patients with PJS. In addition, an early onset and high severity of oral pigmentations in PJS was indicative of serious GI phenotypes. These findings may aid the diagnosis and treatment of PJS.

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February-2017
Volume 13 Issue 2

Print ISSN: 1792-0981
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Copy and paste a formatted citation
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Spandidos Publications style
Zhang Y, Ke Y, Zheng X, Liu Q and Duan X: Correlation between genotype and phenotype in three families with Peutz‑Jeghers Syndrome. Exp Ther Med 13: 507-514, 2017
APA
Zhang, Y., Ke, Y., Zheng, X., Liu, Q., & Duan, X. (2017). Correlation between genotype and phenotype in three families with Peutz‑Jeghers Syndrome. Experimental and Therapeutic Medicine, 13, 507-514. https://doi.org/10.3892/etm.2016.3980
MLA
Zhang, Y., Ke, Y., Zheng, X., Liu, Q., Duan, X."Correlation between genotype and phenotype in three families with Peutz‑Jeghers Syndrome". Experimental and Therapeutic Medicine 13.2 (2017): 507-514.
Chicago
Zhang, Y., Ke, Y., Zheng, X., Liu, Q., Duan, X."Correlation between genotype and phenotype in three families with Peutz‑Jeghers Syndrome". Experimental and Therapeutic Medicine 13, no. 2 (2017): 507-514. https://doi.org/10.3892/etm.2016.3980