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2016 ; 6
(ä): 36626
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Network motifs modulate druggability of cellular targets
#MMPMID27824147
Wu F
; Ma C
; Tan C
Sci Rep
2016[Nov]; 6
(ä): 36626
PMID27824147
show ga
Druggability refers to the capacity of a cellular target to be modulated by a
small-molecule drug. To date, druggability is mainly studied by focusing on
direct binding interactions between a drug and its target. However, druggability
is impacted by cellular networks connected to a drug target. Here, we use
computational approaches to reveal basic principles of network motifs that
modulate druggability. Through quantitative analysis, we find that inhibiting
self-positive feedback loop is a more robust and effective treatment strategy
than inhibiting other regulations, and adding direct regulations to a drug-target
generally reduces its druggability. The findings are explained through analytical
solution of the motifs. Furthermore, we find that a consensus topology of highly
druggable motifs consists of a negative feedback loop without any positive
feedback loops, and consensus motifs with low druggability have multiple positive
direct regulations and positive feedback loops. Based on the discovered
principles, we predict potential genetic targets in Escherichia coli that have
either high or low druggability based on their network context. Our work
establishes the foundation toward identifying and predicting druggable targets
based on their network topology.