Gene expression patterns in cell lines from patients with 18q- syndrome

Zhiqiang Wang, Jannine D. Cody, Robin J. Leach, Peter O'Connell

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Some studies have suggested that for trisomies, some genes are expressed far in excess of the expected 150% level and that this 'dysregulation' is one of the mechanisms for the pathogenesis of trisomies. In an attempt to generalize this result to a monosomy, we examined mRNA isolated from lymphoblastoid cell lines derived from patients with 18q- syndrome, a deletion syndrome involving loss of the distal long arm of chromosome 18. Expression levels of ten chromosome 18 genes were compared between cell lines from eight patients with 18q-syndrome and four diploid controls. Gene expression was investigated by a quantitative reverse-transcription polymerase chain reaction (RT-PCR) method. With the exception of the transcription factor NFATC1, which shows a tendency towards gene dosage compensation (the expression pattern correlates with IgA deficiency), all of the other genes were expressed at a level proportional to their gene copy number. This was true regardless of mRNA abundance or different patterns of gene expression (ubiquitous versus tissue-specific gene expression). These results indicate that, unlike dysregulated gene expression apparent in some trisomies, this monosomic syndrome is largely due to consequences of reduced gene expression.

Original languageEnglish (US)
Pages (from-to)467-475
Number of pages9
JournalHuman Genetics
Volume104
Issue number6
DOIs
StatePublished - 1999

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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