MEG3 and cancer: We found that two lncRNAs - MEG3 (Maternally Expressed Gene 3) and KIAA0125 - compete for the role of the first hub and regulate the expression of the almost totality of the mRNAs in the cancer-MMI-network, by antagonizing mir-379 and mir-150, respectively (Additional file 5: Tables S5 and S10).