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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+Biomol+Screen
2015 ; 20
(6
): 720-8
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A Combination of Screening and Computational Approaches for the Identification of
Novel Compounds That Decrease Mast Cell Degranulation
#MMPMID25838434
McShane MP
; Friedrichson T
; Giner A
; Meyenhofer F
; Barsacchi R
; Bickle M
; Zerial M
J Biomol Screen
2015[Jul]; 20
(6
): 720-8
PMID25838434
show ga
High-content screening of compound libraries poses various challenges in the
early steps in drug discovery such as gaining insights into the mode of action of
the selected compounds. Here, we addressed these challenges by integrating two
biological screens through bioinformatics and computational analysis. We screened
a small-molecule library enriched in amphiphilic compounds in a degranulation
assay in rat basophilic leukemia 2H3 (RBL-2H3) cells. The same library was
rescreened in a high-content image-based endocytosis assay in HeLa cells. This
assay was previously applied to a genome-wide RNAi screen that produced
quantitative multiparametric phenotypic profiles for genes that directly or
indirectly affect endocytosis. By correlating the endocytic profiles of the
compounds with the genome-wide siRNA profiles, we identified candidate pathways
that may be inhibited by the compounds. Among these, we focused on the Akt
pathway and validated its inhibition in HeLa and RBL-2H3 cells. We further showed
that the compounds inhibited the translocation of the Akt-PH domain to the plasma
membrane. The approach performed here can be used to integrate chemical and
functional genomics screens for investigating the mechanism of action of
compounds.