Expanded trinucleotide repeats in the TBP/SCA17 gene mapped to chromosome 6q27 are associated with schizophrenia

  • Chiung Mei Chen
  • , Hsien Yuan Lane*
  • , Yih Ru Wu
  • , Long Sun Ro
  • , Fen Lin Chen
  • , Wei Ling Hung
  • , Yi Ting Hou
  • , Cheng Yueh Lin
  • , Shu Yi Huang
  • , I. Cheng Chen
  • , Bing Wen Soong
  • , Ming Liang Li
  • , Hsiu Mei Hsieh-Li
  • , Ming Tsan Su
  • , Guey Jen Lee-Chen
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Schizophrenia has a complex and non-Mendelian mode of inheritance. Recently, trinucleotide repeat (TNR)-containing genes have been considered as the candidate genes predisposing to schizophrenia. The purpose of this study was to determine whether a genetic association could be observed between schizophrenia and the TNR polymorphisms within the KLHL1AS/SCA8, PPP2R2B/SCA12, and TBP/SCA17 genes. We studied 100 unrelated schizophrenia patients and 124 controls without evident neurodegenerative or psychiatric disorders. The overall allele frequency distributions of the KLHL1AS/SCA8 and PPP2R2B/SCA12 genes were not significantly different between the schizophrenic patients and the control subjects (P > 0.05). The allele frequency distribution in the schizophrenic patients was significantly different from that in the controls at the TBP/SCA17 gene (P = 0.0149), with an increased frequency of 36 repeats in the patients and two patients carrying 45 TNR expansions were identified. TBP/SCA17 is the TATA box binding protein gene mapped to chromosome 6q27. The study suggests that TNR expansions of the TBP/SCA17 gene may contribute to the genetic risk of schizophrenia in rare cases.

Original languageEnglish
Pages (from-to)131-136
Number of pages6
JournalSchizophrenia Research
Volume78
Issue number2-3
DOIs
Publication statusPublished - 2005 Oct 15

Keywords

  • KLHL1AS/SCA8
  • PPP2R2B/SCA12
  • Schizophrenia
  • TBP/SCA17
  • Trinucleotide repeats

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Biological Psychiatry

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