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BioAssay: AID 658698

Inhibition of BCR-ABL-mediated STAT5 phosphorylation in human K562 cells after 6 hrs by Western blotting analysis

A growing body of evidence shows that Signal Transducer and Activator of Transcription 5 (STAT5) protein, a key member of the STAT family of signaling proteins, plays a pivotal role in the progression of many human cancers, including acute myeloid leukemia and prostate cancer. Unlike STAT3, where significant medicinal effort has been expended to identify potent direct inhibitors, Stat5 has been more ..
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 Tested Compounds
 Tested Compounds
All(4)
 
 
Unspecified(4)
 
 
 Tested Substances
 Tested Substances
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Unspecified(4)
 
 
 Related BioAssays
 Related BioAssays
AID: 658698
Data Source: ChEMBL (815770)
Depositor Category: Literature, Extracted
BioAssay Version:
Deposit Date: 2013-05-16
Modify Date: 2014-08-25

Data Table ( Complete ):           View All Data
Targets
Sequence: RecName: Full=Tyrosine-protein kinase ABL1; AltName: Full=Abelson murine leukemia viral oncogene homolog 1; AltName: Full=Abelson tyrosine-protein kinase 1; AltName: Full=Proto-oncogene c-Abl; AltName: Full=p150
Description ..   
Protein Family: Catalytic domain of the Protein Tyrosine Kinase, Abelson kinase
Comment ..   

Gene:ABL1     Related Protein 3D Structures     More BioActivity Data..


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Tested Compounds:
Description:
Title: Small molecule STAT5-SH2 domain inhibitors exhibit potent antileukemia activity.

Abstract: A growing body of evidence shows that Signal Transducer and Activator of Transcription 5 (STAT5) protein, a key member of the STAT family of signaling proteins, plays a pivotal role in the progression of many human cancers, including acute myeloid leukemia and prostate cancer. Unlike STAT3, where significant medicinal effort has been expended to identify potent direct inhibitors, Stat5 has been poorly investigated as a molecular therapeutic target. Thus, in an effort to identify direct inhibitors of STAT5 protein, we conducted an in vitro screen of a focused library of SH2 domain binding salicylic acid-containing inhibitors (#150) against STAT5, as well as against STAT3 and STAT1 proteins for SH2 domain selectivity. We herein report the identification of several potent (K(i) < 5 muM) and STAT5 selective (>3-fold specificity for STAT5 cf. STAT1 and STAT3) inhibitors, BP-1-107, BP-1-108, SF-1-087, and SF-1-088. Lead agents, evaluated in K562 and MV-4-11 human leukemia cells, showed potent induction of apoptosis (IC(50)'s # 20 muM) which correlated with potent and selective suppression of STAT5 phosphorylation, as well as inhibition of STAT5 target genes cyclin D1, cyclin D2, C-MYC, and MCL-1. Moreover, lead agent BP-1-108 showed negligible cytotoxic effects in normal bone marrow cells not expressing activated STAT5 protein. Inhibitors identified in this study represent some of the most potent direct small molecule, nonphosphorylated inhibitors of STAT5 to date.
(PMID: 22148584)
Categorized Comment - additional comments and annotations
From BioAssay Depositor:
Assay Type: Binding
Assay Data Source: Scientific Literature
BAO: Assay Format: cell-based format
Assay Cell Type: K562
Result Definitions
TIDNameDescriptionHistogramTypeUnit
OutcomeThe BioAssay activity outcomeOutcome
1Inhibition activity commentInhibition activity commentString
2Inhibition standard flagInhibition standard flagInteger
3Inhibition qualifierInhibition qualifierString
4Inhibition published valueInhibition published valueFloat
5Inhibition standard valueInhibition standard valueFloat

Data Table (Concise)
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