sentences:  Measured by two different methods, miR-155 was over-expressed in sporadic colorectal cancers by either 22% or 50%.When miR-155 was elevated, hMSH2 was under-expressed in 44% to 67% of the same tissues (and hMSH6 is likely under-expressed as well, and also unstable in the absence of hMSH2).MSH6 has been shown to interact with MSH2, PCNA and BRCA1.