We have previously reported a novel series of oxalyl-aryl-amino benzoic acid-based, catalytic site-directed, competitive, reversible protein tyrosine phosphatase 1B (PTP1B) inhibitors. With readily access to key intermediates, we utilized a solution phase parallel synthesis approach and rapidly identified a highly potent PTP1B inhibitor (19, K(i)=76 nM) with moderate selectivity (5-fold) over T-cell PTPase (TCPTP) through interacting with a second phosphotyrosine binding site (site 2) in the close proximity to the catalytic site.
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http://dx.doi.org/10.1016/s0960-894x(03)00302-0 | DOI Listing |
Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi
January 2025
Department of Integrated Traditional Chinese and Western Medicine, Shandong First Medical University Affiliated Cancer Hospital, Jinan 250117, China. *Corresponding author, E-mail:
It has been popular and challenging to undertake researches on the delay of acquired resistance of epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKI). As key cells for tumor initiation, cancer stem cells (CSC) play an important role in the process of resistance to EGFR-TKI. Although preliminary studies found that traditional Chinese medicine (TCM) could inhibit CSC properties and delay EGFR-TKI resistance, the specific molecular mechanism remains unclear.
View Article and Find Full Text PDFRapid Commun Mass Spectrom
March 2025
Department of Cardiology, Xinjiang Traditional Chinese Medicine Hospital, Xinjiang, China.
Mol Cancer
January 2025
Department of Respiratory Disease, Daping Hospital, Army Medical University, Chongqing, 400042, China.
As research progresses, our understanding of the tumor microenvironment (TME) has undergone profound changes. The TME evolves with the developmental stages of cancer and the implementation of therapeutic interventions, transitioning from an immune-promoting to an immunosuppressive microenvironment. Consequently, we focus intently on the significant role of the TME in tumor proliferation, metastasis, and the development of drug resistance.
View Article and Find Full Text PDFNat Commun
January 2025
NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, The province and ministry co-sponsored collaborative innovation center for medical epigenetics, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, 300134, China.
Reactive oxygen species exacerbate nonalcoholic steatohepatitis (NASH) by oxidizing macromolecules; yet how they promote NASH remains poorly understood. Here, we show that peroxidase activity of global hepatic peroxiredoxin (PRDX) is significantly decreased in NASH, and palmitic acid (PA) binds to PRDX1 and inhibits its peroxidase activity. Using three genetic models, we demonstrate that hepatic PRDX1 protects against NASH in male mice.
View Article and Find Full Text PDFJ Biol Chem
January 2025
Department of Bioengineering, School of Engineering, The University of Tokyo; Institute of Medical Science, The University of Tokyo; Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo; Medical Device Development and Regulation Research Center, School of Engineering, The University of Tokyo, Japan. Electronic address:
Post-translational modification of proteins is a crucial biological reaction that regulates protein functions by altering molecular properties. The specific detection of such modifications in proteins has made significant contributions to molecular biology research and holds potential for future drug development applications. In HIV research, for example, tyrosine sulfation at the N-terminus of C-C chemokine receptor type 5 (CCR5) is considered to significantly enhance HIV infection efficiency.
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