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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Comput+Biol
2015 ; 22
(4
): 266-88
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A scalable method for molecular network reconstruction identifies properties of
targets and mutations in acute myeloid leukemia
#MMPMID25844667
Ong E
; Szedlak A
; Kang Y
; Smith P
; Smith N
; McBride M
; Finlay D
; Vuori K
; Mason J
; Ball ED
; Piermarocchi C
; Paternostro G
J Comput Biol
2015[Apr]; 22
(4
): 266-88
PMID25844667
show ga
A key aim of systems biology is the reconstruction of molecular networks. We do
not yet, however, have networks that integrate information from all datasets
available for a particular clinical condition. This is in part due to the limited
scalability, in terms of required computational time and power, of existing
algorithms. Network reconstruction methods should also be scalable in the sense
of allowing scientists from different backgrounds to efficiently integrate
additional data. We present a network model of acute myeloid leukemia (AML). In
the current version (AML 2.1), we have used gene expression data (both microarray
and RNA-seq) from 5 different studies comprising a total of 771 AML samples and a
protein-protein interactions dataset. Our scalable network reconstruction method
is in part based on the well-known property of gene expression correlation among
interacting molecules. The difficulty of distinguishing between direct and
indirect interactions is addressed by optimizing the coefficient of variation of
gene expression, using a validated gold-standard dataset of direct interactions.
Computational time is much reduced compared to other network reconstruction
methods. A key feature is the study of the reproducibility of interactions found
in independent clinical datasets. An analysis of the most significant clusters,
and of the network properties (intraset efficiency, degree, betweenness
centrality, and PageRank) of common AML mutations demonstrated the biological
significance of the network. A statistical analysis of the response of blast
cells from 11 AML patients to a library of kinase inhibitors provided an
experimental validation of the network. A combination of network and experimental
data identified CDK1, CDK2, CDK4, and CDK6 and other kinases as potential
therapeutic targets in AML.