From a γ-AApeptide-based one-bead-one-compound (OBOC) combinatorial library, we identified γ-AApeptides that can selectively inhibit STAT3-DNA interaction and suppress the expression levels of STAT3 target genes in intact cells. Our results demonstrate that in addition to the SH2 domain, the DNA binding domain of STAT3 is targetable for the development of a new generation of anti-cancer therapeutics.
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http://dx.doi.org/10.1039/c4cc03909b | DOI Listing |
Chembiochem
November 2024
Department of Medicine, Division of Hematology-Oncology, Cedars Sinai Medical Center, 8700 Beverly Blvd, Davis 5065, Los Angeles, CA, 90048, USA.
Aberrantly-active signal transducer and activator of transcription (Stat)3 has a causal role in many human cancers and represents a validated anticancer drug target, though it has posed significant challenge to drug development. A new small molecule, JKB887, was identified through library screening and is predicted to interact with Lys591, Arg609 and Pro63 in the phospho-tyrosine (pTyr)-binding pocket of the Stat3 SH2 domain. JKB887 inhibited Stat3 DNA-binding activity in vitro in a time-dependent manner, with IC of 2.
View Article and Find Full Text PDFCell Oncol (Dordr)
October 2023
Division of Hematology/Oncology, Department of Medicine, Virginia Commonwealth University, P.O. Box 980035, Richmond, VA, 23298, USA.
Purpose: The goal of this study was to characterize the relationship between ATR and STAT3 interactions in human multiple myeloma (MM) cells.
Methods: Various MM cell lines, including IL-6-dependent cells were exposed to ATR inhibitors and effects on STAT3 Tyr705 and Ser727 were monitored by WB analysis and ImageStream analysis. Parallel studies examined induction of cell death, STAT3 DNA binding activity, and expression of STAT3 downstream targets (BCL-X, MCL-1, c-MYC).
Cancers (Basel)
December 2021
School of Cancer Medicine, La Trobe University, Melbourne, VIC 3086, Australia.
Non-small cell lung cancer (NSCLC) is the most common type of lung cancer and accounts for 85% of lung cancer cases. Aberrant activation of the Signal Transducer and Activator of Transcription 3 (STAT3) is frequently observed in NSCLC and is associated with a poor prognosis. Pre-clinical studies have revealed an unequivocal role for tumor cell-intrinsic and extrinsic STAT3 signaling in NSCLC by promoting angiogenesis, cell survival, cancer cell stemness, drug resistance, and evasion of anti-tumor immunity.
View Article and Find Full Text PDFActa Pharmacol Sin
April 2022
National-Local Joint Engineering Laboratory of Druggability and New Drug Evaluation, Guangdong Engineering Laboratory of Druggability and New Drug Evaluation, Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, China.
Hyperactive signal transducer and activator of transcription 3 (STAT3) signaling is frequently detected in human triple-negative breast cancer (TNBC) and gastric cancer, leading to uncontrolled tumor growth, resistance to chemotherapy, and poor prognosis. Thus, inhibition of STAT3 signaling is a promising therapeutic approach for both TNBC and gastric cancer, which have high incidences and mortality and limited effective therapeutic approaches. Here, we report a small molecule, WZ-2-033, capable of inhibiting STAT3 activation and dimerization and STAT3-related malignant transformation.
View Article and Find Full Text PDFACS Omega
August 2019
Chemistry, School of Natural and Environmental Sciences, Newcastle University, NE1 7RU Newcastle, United Kingdom.
Signal transducer activator of transcription 3 (STAT3) is among the most investigated oncogenic transcription factors, as it is highly associated with cancer initiation, progression, metastasis, chemoresistance, and immune evasion. Evidences from both preclinical and clinical studies have demonstrated that STAT3 plays a critical role in several malignancies associated with poor prognosis such as glioblastoma and triple-negative breast cancer, and STAT3 inhibitors have shown efficacy in inhibiting cancer growth and metastasis. Constitutive activation of STAT3 by mutations occurs frequently in tumor cells and directly contributes to many malignant phenotypes.
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