Recently, I am validating some of the microRNA found to be deferentially expressed in one of my study through microRNA profiling. That mouse microRNA is 2 fold change compared to my control untreated samples. To validate the finding I am doing real-time for this microRNA. But in real time PCR (using SYBR Green) it is showing only 0.1 (10%) fold change? Why there are so many differences in these two methods? Could you help me to understand this dilemma?