you can introduce LOCKED NUCLIEC ACID OF  MICROrna OR anti-mirorna somelike  , IT  SHUOLD BE OK

As Zhongliang said, maybe you can use an inhibitor (Anti-miRNA) and testing in yours cells by transient transfection. You can buy miRNA inhibitor in qiagen, dharmacon, ambion, etc. All you need to know is that miRNA might be inhibiting your protein.

Hello

I agree with all and i added this PDF & links for more information .

http://www.ncbi.nlm.nih.gov/pubmed/21400236

http://www.exiqon.com/ls/Pages/Five-tips-microRNA-inhibition.aspx

http://www.medscape.com/viewarticle/837884_5

http://rnajournal.cshlp.org/content/10/3/544.abstract

You can use a 'sponge'

see our paper 

http://journals.plos.org/plospathogens/article/asset?id=10.1371%2Fjournal.ppat.1003222.PDF

But you have to know which miRNA you are interested in

Good luck

Jonathan

If you don't know which microRNA is regulating your protein, you can knockdown Drosha, DGCR8 or Dicer with siRNA or knock them out using CRISPR/Cas9 , and therefore nearly all the microRNAs should be down-regulated.

Thanks a lot for all your responses !!! Many things to try :-)

I'll let you know how it goes