High-throughput screening of suppression subtractive hybridization cDNA libraries using DNA microarray analysis

Noëlani van den Berg, Bridget G Crampton, Ingo Hein, Paul R J Birch, Dave K Berger

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Efficient construction of cDNA libraries enriched for differentially expressed transcripts is an important first step in many biological investigations. We present a quantitative procedure for screening cDNA libraries constructed by suppression subtractive hybridization (SSH). The methodology was applied to two independent SSHs from pearl millet and banana. Following two-color cyanin dye labeling and hybridization of subtracted tester with either unsubtracted driver or unsubtracted tester cDNAs to the SSH libraries arrayed on glass slides, two values were calculated for each clone, an enrichment ratio 1 (ER1) and an enrichment ratio 2 (ER2). Graphical representation of ER1 and ER2 enabled the identification of clones that were likely to represent up-regulated transcripts. Normalization of each clone by the SSH process was determined from the ER2 values, thereby indicating whether clones represented rare or abundant transcripts. Differential expression of pearl millet and banana clones identified from both libraries by this quantitative approach was verified by inverse Northern blot analysis.

Original languageEnglish
Pages (from-to)818-824
Number of pages7
JournalBioTechniques
Volume37
Issue number5
DOIs
Publication statusPublished - Nov 2004

Keywords

  • DNA, Plant/genetics
  • Gene Expression Profiling/methods
  • Gene Library
  • Hybridization, Genetic/genetics
  • Musa/genetics
  • Oligonucleotide Array Sequence Analysis/methods
  • Pennisetum/genetics
  • Plant Proteins/genetics
  • Suppression, Genetic/genetics

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