I'm rather new to this technique and am trying to test the function of a gene using RNAi in vivo. Iíve fed my insect with dsRNAs and found expected decrease in enzymatic activities of the gene. What confuses me is when I tested the mRNA level using rt-PCR. There was actually higher amount of mRNA of the gene. I've read some references and most of them said that the expected results should be reduced mRNA levels, which is in conflict with the enzymatic activity I'm observing. I was wondering if it is possible that the cells are trying to compensate the product and are upregulating the expression of the gene?