check this http://mimirna.centenary.org.au/mep/formulaire.html It contains the tissue specific expression profile data including various cancers.
HI, I suggest these:
You can use starBase Pan-Cancer Analysis Platform . starBase Pan-Cancer Analysis Platform is designed for deciphering Pan-Cancer Networks of lncRNAs, miRNAs, ceRNAs and RNA-binding proteins (RBPs) by mining clinical and expression profiles of 14 cancer types (>6000 samples) from The Cancer Genome Atlas (TCGA) Data Portal (all data available without limitations).
starBase generated Pan-Cancer networks of CLIP-Seq experimentally supported miRNA-lncRNA and miRNA-mRNA interactions.
Pan-Cancer miRNA-mRNA interactions can be available at http://starbase.sysu.edu.cn/targetSite.php