Stability of fecal miRNAs.

Abstract

<p>To evaluate the long-term stability of the samples, we performed miRNA analyses in the fecal samples collected at different time points. Samples 1–15 were collected between 2004 and 2006 and samples 16–30 between 2009 and 2010 from healthy subjects. All samples were stored and processed in similar conditions. Figure (A) shows variations in miR-16 and miR-196a expression among all feces samples. (B) miR-16 and (C) miR-196a expression in subgroup analyses showed similar expression (p>0.1). (D) Normalized miR-196a expression is comparable in long- and short-term stored samples (p = 0.441). (E) Since miR-216a was present in feces at lowest concentrations, and its expression was analyzed by two independent quantitative RT-PCR runs to evaluate the reproducibility of the analysis (p<0.0001). Normalization was performed with using miR-16 as internal normalizer.</p