Have u checked https://www.expasy.org/ or

http://www.ensembl.org/index.html or

https://www.exiqon.com/mirsearch ?

Hello Faris,

http://www.ensembl.org/index.html is a good starting point.

Warm regards,

Venk

Hi,

If you are familiar on microarrays search on GEO. 

http://www.ncbi.nlm.nih.gov/gds/?term=miRNA%20microarray%20breast%20cancer Here you can find some links to publications to read previous attempts. To unite the data is a bit tricky, it depends on what are you looking for.

Dezso

thanks