Epigenetic studies of genomic retroelements in major psychosis

Pei Xiang Kan, Violeta Popendikyte, Zachary A. Kaminsky, Robert H. Yolken, Arturas Petronis

Research output: Contribution to journalArticlepeer-review


This work is dedicated to the exploration of the role of epigenetic (epiG) factors in major psychosis. One of the key functions of epigenetic modification of the genome of eukaryotic cells is to suppress transcriptional activity of the retroelements. Examples of retroelements are endogenous retroviral sequences (ERVs), Alu's, and LINEs, among others, which as a rule are hypermethylated. There is evidence from schizophrenia (SCH) and other human complex diseases that some of the genomic retroelements become transcribed in the affected tissues. Our goal was to screen DNA samples from post-mortem brain tissues of individuals who were affected with major psychiatric illness for retroelements that were located in the hypomethylated fraction of the genomic DNA. Over 100 Alu sequences were cloned, sequenced, and mapped to the human genome. A substantial portion of the cloned Alu's are located close to or within the genes that may be interesting targets for further genetic, transcription, and epigenetic studies.

Original languageEnglish (US)
Pages (from-to)95-106
Number of pages12
JournalSchizophrenia Research
Issue number1
StatePublished - Mar 1 2004


  • Alu sequences
  • Bipolar disorder
  • DNA methylation
  • Endogenous retroviruses
  • Epigenetics
  • Post-mortem brain
  • Retroelements
  • Schizophrenia

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Biological Psychiatry


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