Real-time quantification of microRNAs in Huh7 cells by stem-loop reverse transcriptase polymerase chain reaction / 中华肝脏病杂志

ABSTRACT

<p><b>OBJECTIVE</b>To establish a convenient realtime PCR which can detect microRNAs in the human hepatoma cell line, Huh7 cells.</p><p><b>METHODS</b>Total RNAs in Huh7 cells were extracted. MicroRNA 122, 24 and 146a were assayed by microRNA array, and then verified by Northern blot. Stem-loop RT-PCR and poly(A)-tailed RT-PCR were used to detect the above microRNAs. Data were analyzed with Quantity One software and 7500 system software.</p><p><b>RESULTS</b>Microarray signal intensity of microRNA 122, 24 and 146a in Huh7 cells was 2201.49, 410.20 and 4.70, whose relative expression was confirmed as 0.0383, 0.0249, 0.0001 through Northern blot. While the poly(A)-tailed RT-PCR might only measure microRNA 122, Stem-loop RT-PCR could detect microRNA 122, 24 and 146a, whose average dCt was 2.5, 5.8 and 12.1 in accordance with microRNA array and Northern blot.</p><p><b>CONCLUSION</b>Stem-loop RT-PCR can specifically and sensitively quantity microRNA levels, regardless of their abundance.</p>