I want to extract miRNAs from serum or plasma, there are lots of kits from different companies, eg Qiagen, Exiqon or ABI. Which one is the best ? Have anybody compared those reagents? Any suggestions?
In any case, I would prefer TriZol-Isolation. Via this reagent/method you get all nucleotides (small mRNAs, long mRNAs, miRNAs etc.). If you would like to use a Kit, I would suggest to use quiagen products, which are ok, but expensive. Another good toll are Roboklon miRNA isolation kits!