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Small-molecule-mediated disruption of the protein-protein interactions between acetylated histone tails and the tandem bromodomains of the bromodomain and extra-terminal (BET) family of proteins is an important mechanism of action for the potential modulation of immuno-inflammatory and oncology disease. High-quality chemical probes have proven invaluable in elucidating profound BET bromodomain biology, with seminal publications of both pan- and domain-selective BET family bromodomain inhibitors enabling academic and industrial research. To enrich the toolbox of structurally differentiated N-terminal bromodomain (BD1) BET family chemical probes, this work describes an analysis of the GSK BRD4 bromodomain data set through a lipophilic efficiency lens, which enabled identification of a BD1 domain-biased benzimidazole series. Structure-guided growth targeting a key Asp/His BD1/BD2 switch enabled delivery of GSK023, a high-quality chemical probe with 300-1000-fold BET BD1 domain selectivity and a phenotypic cellular fingerprint consistent with BET bromodomain inhibition.
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http://dx.doi.org/10.1021/acs.jmedchem.3c00906 | DOI Listing |
Front Immunol
September 2025
Department of Experimental Pediatrics, University Hospital, Otto-von-Guericke-University, Magdeburg, Germany.
Tumors frequently evade immune destruction by impairing cytotoxic CD8 T-cell responses, highlighting the need for strategies that restore T-cell functionality. Here, we identify SLAMF7 (CD319) as a key enhancer of human CD8 T-cell responses against tumors. SLAMF7 expression is induced by pro-inflammatory signals such as IL-12 and CD28 co-stimulation.
View Article and Find Full Text PDFACS Chem Biol
September 2025
Cold Spring Harbor Laboratory, Cold Spring Harbor, New York 11724, United States.
Targeted protein degradation (TPD) is a promising modality that leverages the endogenous cellular protein degradation machinery to degrade selected proteins. Recently, we validated CUL3 E3 ligase as a new actionable E3 ligase for TPD application by developing a synthetic macrocycle ligand to engage KLHL20. Linking the KLHL20 ligand to JQ1, we created the PROTAC molecule BTR2004, which exhibited potent degradation of BET family proteins BRD 2, 3, and 4.
View Article and Find Full Text PDFSci Rep
September 2025
Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box. 2455, 11451, Riyadh, Saudi Arabia.
Maize (Zea mays L.), a globally significant cereal of the Poaceae family, plays a pivotal role in food and feed security. However, its productivity is increasingly threatened by climate-induced drought stress and low organic matter content of soil, particularly in arid and semi-arid regions.
View Article and Find Full Text PDFBlood Adv
August 2025
MD Anderson Cancer Center, Houston, Texas, United States.
The alarmins, S100A8 (A8) and S100A9 (A9), are low molecular weight proteins belonging to the S100 protein family. A8 and A9 are secreted into the extracellular space and plasma, where they interact with TLR4 (Toll like receptor 4), RAGE (receptor for advanced glycation end products) and CD33. In present studies, we determined the preclinical efficacy of tasquinimod (TQ) against advanced MPN cell lines and patient-derived (PD) CD34+ blastic phase (BP, >5% blasts in PB) MPN cells.
View Article and Find Full Text PDFFront Mol Biosci
July 2025
Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States.
Introduction: Arsenicals like lewisite are highly toxic vesicant chemical warfare agents that cause severe skin damage and systemic inflammation. Exposure activates cytokine release, leading to pulmonary injury, including edema, hemorrhage, and in severe cases, Bronchiolitis Obliterans Syndrome (BOS), marked by airway fibrosis and narrowing. The only approved treatment, British anti-lewisite (BAL), has limitations due to toxicity and field administration challenges.
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