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Article

Smith‑Magenis syndrome in monozygotic twin fetuses presenting with discordant phenotypes and uteroplacental insufficiency

  • Authors:
    • Yi Zhou
    • Yingjun Xie
    • Yunxiao Zhu
    • Jianzhu Wu
    • Meijiao Shang
    • Baojiang Chen
    • Qun Fang
  • View Affiliations / Copyright

    Affiliations: Department of Obstetrics and Gynaecology, Fetal Medicine Center, The First Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China, Department of Ultrasonic Medicine, Fetal Medicine Center, The First Affiliated Hospital of Sun Yat‑sen University, Guangzhou, Guangdong 510080, P.R. China
  • Pages: 347-352
    |
    Published online on: November 9, 2015
       https://doi.org/10.3892/mmr.2015.4538
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Abstract

Smith‑Magenis syndrome (SMS) is a rare condition with multiple congenital malformations caused by the haploinsufficiency of RAI1 (deletion or mutation of RAI1). However, the correlation between genotype and phenotype is not well understood. The present study describes the prenatal diagnosis of monozygotic twins with a 17p11.2 deletion, which is indicative of SMS, who presented with discordant phenotypes and uteroplacental insufficiency. A high‑resolution genome‑wide single nucleotide polymorphism array revealed a 3.7‑Mb deletion in the 17p11.2 chromosome region. Accurate breakpoints of the deletion in these patients were used to identify correlations between SMS and the concomitant phenotypes, particularly uteroplacental insufficiency, which has rarely been investigated in SMS. In addition, no exonic mutations were identified in or affected known disease‑associated loci that could explain the congenital anomalies, according to a model that accounts for the possibility of incomplete penetrance. Furthermore, a novel benign copy number variation (a duplication of 195 kb at 13q12.13) was identified but was unlikely to be clinically significant in the discordant phenotypes of the twins. The present study showed that multiple interacting genetic and environmental factors are involved in determining the variance of the SMS phenotype.
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Copy and paste a formatted citation
Spandidos Publications style
Zhou Y, Xie Y, Zhu Y, Wu J, Shang M, Chen B and Fang Q: Smith‑Magenis syndrome in monozygotic twin fetuses presenting with discordant phenotypes and uteroplacental insufficiency. Mol Med Rep 13: 347-352, 2016.
APA
Zhou, Y., Xie, Y., Zhu, Y., Wu, J., Shang, M., Chen, B., & Fang, Q. (2016). Smith‑Magenis syndrome in monozygotic twin fetuses presenting with discordant phenotypes and uteroplacental insufficiency. Molecular Medicine Reports, 13, 347-352. https://doi.org/10.3892/mmr.2015.4538
MLA
Zhou, Y., Xie, Y., Zhu, Y., Wu, J., Shang, M., Chen, B., Fang, Q."Smith‑Magenis syndrome in monozygotic twin fetuses presenting with discordant phenotypes and uteroplacental insufficiency". Molecular Medicine Reports 13.1 (2016): 347-352.
Chicago
Zhou, Y., Xie, Y., Zhu, Y., Wu, J., Shang, M., Chen, B., Fang, Q."Smith‑Magenis syndrome in monozygotic twin fetuses presenting with discordant phenotypes and uteroplacental insufficiency". Molecular Medicine Reports 13, no. 1 (2016): 347-352. https://doi.org/10.3892/mmr.2015.4538
Copy and paste a formatted citation
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Spandidos Publications style
Zhou Y, Xie Y, Zhu Y, Wu J, Shang M, Chen B and Fang Q: Smith‑Magenis syndrome in monozygotic twin fetuses presenting with discordant phenotypes and uteroplacental insufficiency. Mol Med Rep 13: 347-352, 2016.
APA
Zhou, Y., Xie, Y., Zhu, Y., Wu, J., Shang, M., Chen, B., & Fang, Q. (2016). Smith‑Magenis syndrome in monozygotic twin fetuses presenting with discordant phenotypes and uteroplacental insufficiency. Molecular Medicine Reports, 13, 347-352. https://doi.org/10.3892/mmr.2015.4538
MLA
Zhou, Y., Xie, Y., Zhu, Y., Wu, J., Shang, M., Chen, B., Fang, Q."Smith‑Magenis syndrome in monozygotic twin fetuses presenting with discordant phenotypes and uteroplacental insufficiency". Molecular Medicine Reports 13.1 (2016): 347-352.
Chicago
Zhou, Y., Xie, Y., Zhu, Y., Wu, J., Shang, M., Chen, B., Fang, Q."Smith‑Magenis syndrome in monozygotic twin fetuses presenting with discordant phenotypes and uteroplacental insufficiency". Molecular Medicine Reports 13, no. 1 (2016): 347-352. https://doi.org/10.3892/mmr.2015.4538
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