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Executioner caspases degrade essential mediators of pathogen-host interactions to inhibit growth of intracellular Listeria monocytogenes.
Cell Death Dis
January 2025
Faculty of Science and Medicine, Department of Oncology, Microbiology and Immunology, Anatomy unit, University of Fribourg, CH-1700, Fribourg, Switzerland.
Cell death mediated by executioner caspases is essential during organ development and for organismal homeostasis. The mechanistic role of activated executioner caspases in antibacterial defense during infections with intracellular bacteria, such as Listeria monocytogenes, remains elusive. Cell death upon intracellular bacterial infections is considered altruistic to deprive the pathogens of their protective niche.
View Article and Find Full Text PDFIntrinsic dual-emitting Si dots for high-precision and broad-range pH detection.
Anal Chim Acta
February 2025
Shenzhen Key Laboratory of Synthetic Genomics, Guangdong Provincial Key Laboratory of Synthetic Genomics, CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China. Electronic address:
Background: High-precision and broad-range pH detection is critical for health status assessment, such as signal transduction, enzyme activity, endocytosis, and cell proliferation and apoptosis. Although pH-responsive ratiometric fluorescent probes offer an effective pH monitoring strategy, their preparation often requires multi-step modification and decreases fluorescence efficiency and stability. Herein, we developed a simple method to prepare fluorescent Si dots with dual emission centers for high-precision and broad-range pH monitoring, and the detection of urease based on pH-responsive Si dots and pH monitoring in living cell was further explored.
View Article and Find Full Text PDFEnhanced sensitivity and scalability with a Chip-Tip workflow enables deep single-cell proteomics.
Nat Methods
January 2025
Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Copenhagen, Denmark.
Single-cell proteomics (SCP) promises to revolutionize biomedicine by providing an unparalleled view of the proteome in individual cells. Here, we present a high-sensitivity SCP workflow named Chip-Tip, identifying >5,000 proteins in individual HeLa cells. It also facilitated direct detection of post-translational modifications in single cells, making the need for specific post-translational modification-enrichment unnecessary.
View Article and Find Full Text PDFAmide Internucleoside Linkages Suppress the MicroRNA-like Off-Target Activity of Short Interfering RNA.
ACS Chem Biol
January 2025
Department of Chemistry, Binghamton University, the State University of New York, Binghamton, New York 13902, United States.
RNA interference (RNAi) has rapidly matured as a novel therapeutic approach. In this field, chemical modifications have been critical to the clinical success of short interfering RNAs (siRNAs). Notwithstanding the significant advances, achieving robust durability and gene silencing in extrahepatic tissues, as well as reducing off-target effects of siRNA, are areas where chemical modifications can still improve siRNA performance.
View Article and Find Full Text PDFPharmacodynamic characterization and evaluation of oxidative stress effects of digitoxigenin derivatives on HeLa cells.
J Membr Biol
February 2025
Laboratório de Bioquímica Celular, Universidade Federal de São João del-Rei (UFSJ), Divinópolis, Brazil.
Cancer is a leading cause of death worldwide and its treatment is hampered by the lack of specificity and side effects of current drugs. Cardiotonic steroids (CTS) interact with Na/K-ATPase (NKA) and induce antineoplastic effects, but their narrow therapeutic window is key limiting factor. The synthesis of digitoxigenin derivatives with glycosidic unit modifications is a promising approach to develop more selective and effective antitumor agents.
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