Real-time RT-PCR analysis of mRNA decay: Half-life of Beta-actin mRNA in human leukemia CCRF-CEM and Nalm-6 cell lines

Guy J. Leclerc, Gilles M. Leclerc, Julio C. Barredo

Research output: Contribution to journalArticle

52 Scopus citations

Abstract

Background: We describe an alternative method to determine mRNA half-life (t1/2) based on the Real-Time RT-PCR procedure. This approach was evaluated by using the β-actin gene as a reference molecule for measuring of mRNA stability. Results: Human leukemia Nalm-6 and CCRF-CEM cells were treated with various concentrations of Actinomycin D to block transcription and aliquots were removed periodically. Total RNA was isolated and quantified using the RiboGreen® fluorescent dye with the VersaFluor Fluorometer System. One μg of total RNA was reverse transcribed and used as template for the amplification of a region of the β-actin gene (231 bp). To generate the standard curve, serial ten-fold dilutions of the pBactin-231 vector containing the cDNA amplified fragment were employed, β-actin mRNAs were quantified by Real-Time RT-PCR using the SYBR® Green I fluorogenic dye and data analyzed using the iCycle iQ system software. Using this method, the β-actin mRNA exhibited a half-life of 6.6 h and 13.5 h in Nalm-6 and CCRF-CEM cells, respectively. The t1/2 value obtained for Nalm-6 is comparable to those estimated from Northern blot studies, using normal human leukocytes (5.5 h). Conclusions: We have developed a rapid, sensitive, and reliable method based on Real-Time RTPCR for measuring mRNA half-life. Our results confirm that β-actin mRNA half-life can be affected by the cellular growth rate.

Original languageEnglish (US)
Article number1
JournalCancer Cell International
Volume2
DOIs
StatePublished - Mar 7 2002

ASJC Scopus subject areas

  • Genetics
  • Oncology
  • Cancer Research

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