CTAB-urea method purifies RNA from melanin for cDNA microarray analysis

M. Stefania Lagonigro, Loris De Cecco, Piero Carninci, Delia Di Stasi, Tiziana Ranzani, Monica Rodolfo, Manuela Gariboldi

Research output: Contribution to journalArticlepeer-review


Melanin represents a major problem for the study of melanoma by microarrays since it is retained during RNA extraction and inhibits the enzymatic reactions used for probe preparation. Here we report a new method for cleaning RNA from melanin, based on the use of the cationic detergent cetyl-trimethylammonium bromide (CTAB)-urea for RNA precipitation. This method is easy to perform and has a low cost. Purified RNA is recovered with high quality and good yield. CTAB-urea treated RNA from highly pigmented melanoma cells can be successfully reverse transcribed and labeled to obtain probes which can be subsequently used in cDNA microarray experiments, giving consistent and reproducible results.

Original languageEnglish
Pages (from-to)312-315
Number of pages4
JournalPigment Cell Research
Issue number3
Publication statusPublished - Jun 2004


  • cDNA arrays
  • Melanin
  • Melanoma
  • Method
  • RNA purification

ASJC Scopus subject areas

  • Cell Biology
  • Agronomy and Crop Science
  • Plant Science
  • Clinical Biochemistry
  • Developmental Biology


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