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SIRT6 promotes angiogenesis by enhancing VEGFA secretion via demyristoylation in endothelial cell.
J Mol Cell Cardiol
January 2025
Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, 180 Fenglin Road, Shanghai 200032, China; State Key Laboratory of Cardiology, Zhongshan Hospital, Fudan University, China; Key Laboratory of Viral Heart Diseases, National Health Commission, Shanghai, China; Key Laboratory of Viral Heart Diseases, Chinese Academy of Medical Sciences, Shanghai, China; National Clinical Research Center for Interventional Medicine, Shanghai, China; Institutes of Biomedical Sciences, Fudan University, Shanghai, China. Electronic address:
Angiogenesis plays a pivotal role in ischemic cardiovascular disease, accompanied by epigenetic regulation during this process. Sirtuin 6 (SIRT6) has been implicated in the regulation of DNA repair, transcription and aging, with its deacetylase activity fully studied. However, the role of SIRT6 demyristoylase activity remains less clear, with even less attention given to its myristoylated substrates.
View Article and Find Full Text PDFmRNA export factors store nascent transcripts within nuclear speckles as an adaptive response to transient global inhibition of transcription.
Mol Cell
January 2025
Cancer Research Division, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; Sir Peter MacCallum Department of Oncology, University of Melbourne, Melbourne, VIC, Australia; Department of Haematology, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; Centre for Cancer Research, University of Melbourne, Melbourne, VIC, Australia. Electronic address:
Several transcription inhibitors have been developed as cancer therapies. However, they show modest clinical activity, highlighting that our understanding of the cellular response to transcriptional inhibition remains incomplete. Here we report that potent inhibitors of transcription not only impact mRNA output but also markedly impair mRNA transcript localization and nuclear export.
View Article and Find Full Text PDFCyclometalated ruthenium (II) complex-based nanoparticles for enhanced microRNAs detection and imaging in living cells.
Biosens Bioelectron
December 2024
Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, Guangdong, 510515, China. Electronic address:
MicroRNA (miRNA) imaging in living cells is paramount for comprehending its dynamic functions and profiles, offering valuable insights into miRNA-related cellular processes. However, this remains challenging due to limited transfection agents and the low abundance of miRNAs. Herein, a smart nanosystem was proposed for miRNA imaging in living cells by ingeniously integrating cyclometalated ruthenium (II) nanoparticles (RuNPs) with a catalyzed hairpin assembly (CHA) strategy.
View Article and Find Full Text PDFDegradable Theranostic Polyurethane for Macrophage-Targeted Antileishmanial Drug Delivery.
Biomacromolecules
January 2025
Polymer Research Centre and Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Nadia, Mohanpur 741246, West Bengal, India.
The present investigation aims to develop a reactive oxygen species (ROS) and esterase-responsive biodegradable mannosylated polyurethane to effectively deliver the encapsulated antileishmanial drug amphotericin B (AmB) selectively to infected macrophage cells. Owing to suitable amphiphilic balance, the as-synthesized glycosylated polyurethane () with aryl boronic ester-based diol () moiety as ROS-trigger, water-soluble mannose pendants, and fluorescent 4,4-difluoro-4-bora-3a,4a-diaza--indacene (BODIPY) chain ends for bioimaging formed nanoaggregates in an aqueous medium as confirmed by H NMR spectroscopy, dynamic light scattering (DLS), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and critical aggregation concentration (CAC) measurements. Aided by two endogenous stimuli present in phagolysosome, ROS and esterase, AmB-encapsulated polymeric nanoaggregates as drug delivery vehicles achieved an efficient reduction of both and intracellular amastigote burden compared to the free AmB.
View Article and Find Full Text PDFNEK7 phosphorylation amplifies NLRP3 inflammasome activation downstream of potassium efflux and gasdermin D.
Sci Immunol
January 2025
Department of Pathology and Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, MI 48109, USA.
The NLRP3 inflammasome plays a critical role in innate immunity and inflammatory diseases. NIMA-related kinase 7 (NEK7) is essential for inflammasome activation, and its interaction with NLRP3 is enhanced by K efflux. However, the mechanism by which K efflux promotes this interaction remains unknown.
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