Taqman or LNA, or any other methods? If I chose one of these methods, should I also buy their related products, like RT kit and Real-time PCR assay kit, too?
We are applying actually mercuty LNA and we measure the expression with real time PCR. this page could be useful for you.
http://www.genomeweb.com/node/923375
For both approach, LNAs and RT-PCR, you must be careful with the appropriate LNA and primers because all the microRNAs has a set of isomiRs (http://www.ncbi.nlm.nih.gov/pubmed?term=marco%20A%20miR-2). Them if you need to silence all the isomiRs, you must select the biggest common region among all the isomiRs.