Searching for tissue-specific expression pattern-linked nucleotides of UGT1A isoforms

PLoS One. 2007 Apr 25;2(4):e396. doi: 10.1371/journal.pone.0000396.


UDP-glucuronosyltransferases 1A isoforms belong to a superfamily of microsomal enzymes responsible for glucuronidation of numerous endogenous and exogenous compounds. The nine functional UGT1A isoforms are encoded by a single UGT1A gene locus with multiple first exons. The expression of the UGT1A transcripts was measured by quantitative RT-PCR in 23 normal human tissues. The tissue-specific expression patterns were observed in 13 tissues. To understand the regulation mechanism that is responsible for the tissue-specific expression patterns, we scanned the DNA sequence alignments of the putative promoter regions, exon 1 sequences and intron 1 sequences for those expression-pattern-linked nucleotides. Using one of the expression-pattern-linked nucleotides for livers as an example, we showed that a database comprised of these expression-pattern-linked nucleotides could be used to generate focused hypotheses on the problem of tissue-specific expression, which is critical for tissue-specific pharmacodynamics of anticancer drugs.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Gene Expression Profiling
  • Glucuronosyltransferase / genetics
  • Glucuronosyltransferase / metabolism*
  • Humans
  • Isoenzymes / genetics
  • Isoenzymes / metabolism*
  • RNA, Messenger / genetics
  • Reverse Transcriptase Polymerase Chain Reaction


  • Isoenzymes
  • RNA, Messenger
  • Glucuronosyltransferase