Plasma microRNA profiles in rat models of hepatocellular injury, cholestasis, and steatosis.

PloS One
Yu YamauraTsuyoshi Yokoi

Abstract

MicroRNAs (miRNAs) are small RNA molecules that function to modulate the expression of target genes, playing important roles in a wide range of physiological and pathological processes. The miRNAs in body fluids have received considerable attention as potential biomarkers of various diseases. In this study, we compared the changes of the plasma miRNA expressions by acute liver injury (hepatocellular injury or cholestasis) and chronic liver injury (steatosis, steatohepatitis and fibrosis) using rat models made by the administration of chemicals or special diets. Using miRNA array analysis, we found that the levels of a large number of miRNAs (121-317 miRNAs) were increased over 2-fold and the levels of a small number of miRNAs (6-35 miRNAs) were decreased below 0.5-fold in all models except in a model of cholestasis caused by bile duct ligation. Interestingly, the expression profiles were different between the models, and the hierarchical clustering analysis discriminated between the acute and chronic liver injuries. In addition, miRNAs whose expressions were typically changed in each type of liver injury could be specified. It is notable that, in acute liver injury models, the plasma level of miR-122, the most abundant miRNA in...Continue Reading

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Methods Mentioned

BETA
PCR
Assay
Precipitation

Software Mentioned

mapletree
SDS
MxPro QPCR
Cluster

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