miR-21 inhibitor 37

miR-21 inhibitor 37 is a novel inhibitor of miR-21 function with EC50 of 5.3 uM in HeLa-miR21-Luc assays, displays no inhibition of miR-122; miR-21 inhibitor 37 has no effect on either mature or primary miR-21 levels in HeLa cells, as well as no effect on miR-21 transcription; exhibits low micromolar potency against different established cancer cells (MCF-7 and MIA PaCa-2, IC50=4.5 and 6.7 uM); shows significant rescue of both PDCD4 (9.5-fold increase) and PTEN (1.5-fold increase) levels inA498 RCC cells, sensitizes cells to topotecan-induced apoptosis.