The new device was used to treat the mice for two weeks, first by blocking the gene for MRP1 (multidrug resistant protein 1) ... However, when they encounter the right type of messenger RNA sequence in a cancer cell, it unfolds and binds to the mRNA, ... It codes for a protein that eliminates cancer drugs from tumor cells, pumping them out and rendering them ineffective. Not only ... keeping it from producing additional molecules of the MRP1 protein, the researchers explained, ...