The normalization of gene expression data in melanoma: Investigating the use of glyceraldehyde 3-phosphate dehydrogenase and 18S ribosomal RNA as internal reference genes for quantitative real-time PCR

Orsolya Giricz, Janelle L. Lauer-Fields, Gregg B. Fields

Research output: Contribution to journalArticle

28 Scopus citations


We examined a panel of 26 melanoma and fibroblast samples (tissues and cultured cells) to evaluate the suitability of two commonly used housekeeping genes, glyceraldehyde 3-phosphate dehydrogenase (GAPDH) and 18S ribosomal RNA (rRNA), for quantitative real-time PCR. Both genes showed significant variations within the individual cell line and tissue groups. Although no overall trends were observed in the expression of the 18S rRNA, GAPDH was up-regulated in melanoma tissue and cultured cells compared with the corresponding normal samples. In melanoma and fibroblast cell lines and tissues, absolute quantification appears to be more appropriate than normalizing messenger RNA (mRNA) expression via GAPDH or 18S rRNA housekeeping genes.

Original languageEnglish (US)
Pages (from-to)137-139
Number of pages3
JournalAnalytical Biochemistry
Issue number1
Publication statusPublished - Sep 1 2008


ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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