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2017 ; 8
(49
): 85136-85149
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Using molecular functional networks to manifest connections between obesity and
obesity-related diseases
#MMPMID29156709
Yang J
; Qiu J
; Wang K
; Zhu L
; Fan J
; Zheng D
; Meng X
; Yang J
; Peng L
; Fu Y
; Zhang D
; Peng S
; Huang H
; Zhang Y
Oncotarget
2017[Oct]; 8
(49
): 85136-85149
PMID29156709
show ga
Obesity is a primary risk factor for many diseases such as certain cancers. In
this study, we have developed three algorithms including a random-walk based
method OBNet, a shortest-path based method OBsp and a direct-overlap method
OBoverlap, to reveal obesity-disease connections at protein-interaction
subnetworks corresponding to thousands of biological functions and pathways.
Through literature mining, we also curated an obesity-associated disease list, by
which we compared the methods. As a result, OBNet outperforms other two methods.
OBNet can predict whether a disease is obesity-related based on its associated
genes. Meanwhile, OBNet identifies extensive connections between obesity genes
and genes associated with a few diseases at various functional modules and
pathways. Using breast cancer and Type 2 diabetes as two examples, OBNet
identifies meaningful genes that may play key roles in connecting obesity and the
two diseases. For example, TGFB1 and VEGFA are inferred to be the top two key
genes mediating obesity-breast cancer connection in modules associated with brain
development. Finally, the top modules identified by OBNet in breast cancer
significantly overlap with modules identified from TCGA breast cancer gene
expression study, revealing the power of OBNet in identifying biological
processes involved in the disease.