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2016 ; 15
(5
): 689-98
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
MiRImpact, a new bioinformatic method using complete microRNA expression profiles
to assess their overall influence on the activity of intracellular molecular
pathways
#MMPMID27027999
Artcibasova AV
; Korzinkin MB
; Sorokin MI
; Shegay PV
; Zhavoronkov AA
; Gaifullin N
; Alekseev BY
; Vorobyev NV
; Kuzmin DV
; Kaprin ?D
; Borisov NM
; Buzdin AA
Cell Cycle
2016[]; 15
(5
): 689-98
PMID27027999
show ga
MicroRNAs (miRs) are short noncoding RNA molecules that regulate expression of
target mRNAs. Many published sources provide information about miRs and their
targets. However, bioinformatic tools elucidating higher level impact of the
established total miR profiles, are still largely missing. Recently, we developed
a method termed OncoFinder enabling quantification of the activities of
intracellular molecular pathways basing on gene expression data. Here we propose
a new technique, MiRImpact, which enables to link miR expression data with its
estimated outcome on the regulation of molecular pathways, like signaling,
metabolic, cytoskeleton rearrangement, and DNA repair pathways. MiRImpact uses
OncoFinder rationale for pathway activity calculations, with the major
distinctions that (i) it deals with the concentrations of miRs--known regulators
of gene products participating in molecular pathways, and (ii) miRs are
considered as negative regulators of target molecules, if other is not specified.
MiRImpact operates with 2 types of databases: for molecular targets of miRs and
for gene products participating in molecular pathways. We applied MiRImpact to
compare regulation of human bladder cancer-specific signaling pathways at the
levels of mRNA and miR expression. We took 2 most complete alternative databases
of experimentally validated miR targets--miRTarBase and DianaTarBase, and an
OncoFinder database featuring 2725 gene products and 271 signaling pathways. We
showed that the impact of miRs is orthogonal to pathway regulation at the mRNA
level, which stresses the importance of studying posttranscriptional regulation
of gene expression. We also report characteristic set of miR and mRNA regulation
features linked with bladder cancer.