I performed RT-PCR to validate my differentially expressed microRNAs. But I didn't get any accurate results. What is the reason? I also performed standard PCR (with a gradient temperature) to select the best temperature and got bands at almost all temperatures. My reference gene (U6 SnRNA) worked well in RT-PCR, but miRNA-specific primers didn't show any results (amplification has occurred).
Please help me to find the correct reason.