Lack of STK11 gene expression in homozygous twins with Peutz-Jeghers syndrome

Chih Jen Tseng, Shi Feng Chen, Shu I. Liou, Shu Chuan Lu, Jie Ming Chen, Chien Feng Sun, Shuenn Dye Chang, Po Jen Cheng, Jui Der Liou, Da Chang Chu*

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

4 Scopus citations

Abstract

Clinical features of Peutz-Jeghers syndrome (PJS), an autosomal dominant disorder, include clusters of melanotic spots on the lips and limbs, polyposis of the gastrointestinal (GI) tract, and propensity to develop neoplasms of the GI tract, ovaries, testes, and other sites. We report twin sisters with PJS who were found to be homozygous, based on analyses of 9 DNA markers containing short tandem repeats (STR). Aberrant expression of a putative tumor suppressor gene, STK11, which encodes a serine threonine kinase, has been suggested as the etiologic factor in PJS. In both of the twin sisters with PJS, mRNA analyses by RT-PCR demonstrated a complete lack of STK 11 gene expression. These results provide direct evidence that STK11 gene expression is abnormal in PJS. Detecting abnormal expression of the STK11 gene may serve as a molecular approach to the diagnosis of PJS and may facilitate genotype-phenotype correlations in PJS patients.

Original languageEnglish
Pages (from-to)154-158
Number of pages5
JournalAnnals of Clinical and Laboratory Science
Volume34
Issue number2
StatePublished - 03 2004
Externally publishedYes

Keywords

  • Cervical cancer
  • Ovarian neoplasm
  • Peutz-Jeghers syndrome
  • STK11 gene expression

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