Starting from known Src SH2 inhibitors incorporating five-membered heterocycles or benzamide scaffolds, we prepared tetrasubstituted imidazole compounds able to interact with the pY, pY+1 and pY+3 binding sites of the Src SH2 protein. The synthesis and biological data are presented.
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http://dx.doi.org/10.1016/s0960-894x(02)00138-5 | DOI Listing |
Diabetes Metab Syndr Obes
January 2025
Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, People's Republic of China.
Purpose: Mitochondrial dysfunction mediated by c-Jun N-terminal kinase (JNK) plays an important role in lipotoxic liver injury in nonalcoholic steatohepatitis (NASH). This study aims to investigate the pharmacological mechanism of Jiangzhi Granule (JZG), a Chinese herbal formula against NASH, with a focus on its regulation of JNK signaling-mediated mitochondrial function.
Methods: Hepatocytes were induced by palmitic acid (PA) for 24 h to establish an in vitro lipotoxic model, which was simultaneously treated with either JZG or vehicle control.
Mol Divers
January 2025
Department of Pharmacology, Manipal College of Pharmaceutical Sciences, Manipal Academy of Higher Education (MAHE), Manipal, 576104, India.
SH2 (Src Homology 2) domains play a crucial role in phosphotyrosine-mediated signaling and have emerged as promising drug targets, particularly in cancer therapy. STAT3 (Signal Transducer and Activator of Transcription 3), which contains an SH2 domain, plays a pivotal role in cancer progression and immune evasion because it facilitates the dimerization of STAT3, which is essential for their activation and subsequent nuclear translocation. SH2 domain-mediated STAT3 inhibition disrupts this binding, reduces phosphorylation of STAT3, and impairs dimerization.
View Article and Find Full Text PDFProtein Sci
January 2025
Department of Physics, University of Toronto, Toronto, Ontario, Canada.
The point mutation N642H of the signal transducer and activator of transcription 5B (STAT5B) protein is associated with aggressive and drug-resistant forms of leukemia. This mutation is thought to promote cancer due to hyperactivation of STAT5B caused by increased stability of the active, parallel dimer state. However, the molecular mechanism leading to this stabilization is not well understood as there is currently no structure of the parallel dimer.
View Article and Find Full Text PDFNat Commun
December 2024
Institute of Physiological Chemistry, Faculty of Medicine, Philipps University of Marburg, Marburg, Germany.
J Biol Chem
December 2024
Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA. Electronic address:
While ATP-site inhibitors for protein-tyrosine kinases are often effective drugs, their clinical utility can be limited by off-target activity and acquired resistance mutations due to the conserved nature of the ATP-binding site. However, combining ATP-site and allosteric kinase inhibitors can overcome these shortcomings in a double-drugging framework. Here we explored the allosteric effects of two pyrimidine diamines, PDA1 and PDA2, on the conformational dynamics and activity of the Src-family tyrosine kinase Hck, a promising drug target for acute myeloid leukemia.
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