A Small Molecule Inhibitor, OGP46, Is Effective against Imatinib-Resistant BCR-ABL Mutations via the BCR-ABL/JAK-STAT Pathway

Molecular Therapy Oncolytics
Liuya WeiZhenbo Hu

Abstract

Chronic myeloid leukemia (CML) is caused by the Philadelphia (Ph+) chromosome carrying the BCR-ABL oncogene, a constitutively active tyrosine kinase. The discovery of imatinib represents a major success story in the treatment against CML. However, mutations in the BCR-ABL kinase domain are a major cause of resistance to imatinib, demonstrating that BCR-ABL remains a critical drug target. Here, we investigate a novel small molecule inhibitor, OGP46, for its inhibitory activity against K562, a panel of murine BaF3 cell lines stably expressing either wild-type BCR-ABL or its mutant forms, including T315I. OGP46 exhibits potent activity against imatinib-resistant BCR-ABL mutations, including T315I. OGP46 induced cell differentiation accompanied by G0/G1 cell-cycle arrest and suppressed the colony formation capacity of cells. Treatment with OGP46 significantly decreased the mRNA and protein expression of BCR-ABL in K562 and BaF3-p210-T315I cells. Mechanistically, the anti-cancer activity of OGP46 induced by cell differentiation is likely through the BCR-ABL/JAK-STAT pathway in native BCR-ABL and mutant BCR-ABL, including T315I, of CML cells. Our findings highlight that OGP46 is active against not only native BCR-ABL but also 11 clin...Continue Reading

Citations

Mar 23, 2021·Frontiers in Cell and Developmental Biology·Min ZhaoZhe-Sheng Chen
May 25, 2021·Drug Discovery Today·Xiang-Yu MaZhe-Sheng Chen

❮ Previous
Next ❯

Methods Mentioned

BETA
flow cytometry
light microscopy
PCR
transfection
Illumina sequencing

Software Mentioned

ggplot2
TopHat
R
clusterProfiler
AI600
enrichplot
DESeq R

Related Concepts

Related Feeds

BCL-2 Family Proteins

BLC-2 family proteins are a group that share the same homologous BH domain. They play many different roles including pro-survival signals, mitochondria-mediated apoptosis and removal or damaged cells. They are often regulated by phosphorylation, affecting their catalytic activity. Here is the latest research on BCL-2 family proteins.