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Enhanced Electrochemiluminescence from Ruthenium-Tagged Immune Complex at Flexible Chains for Sensitive Analysis of Glutamate Decarboxylase Antibody.
Biosensors (Basel)
January 2025
State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210092, China.
Herein, a sensitive electrochemiluminescence (ECL) immunosensor is designed by immobilizing ruthenium-tagged immune complexes at flexible poly-ethylene-glycol (PEG) chains on the electrode surface, which offers more freedom for the collision of the ruthenium complex at the electrode during the initial ECL reaction. The electrochemical characterizations confirm the loose structure of the assembled layer with the immune complex, providing an increase in the current and the resultant enhanced ECL emissions. Comparing the sensors with the rigid structure, a 34-fold increase in the maximal ECL emission is recorded when PEG3400 is used as a linker.
View Article and Find Full Text PDFNovel photocrosslinking chemical probes utilized for high-resolution spatial transcriptomics.
RSC Chem Biol
January 2025
Department of Pharmaceutical Sciences, University of California Irvine California 92697 USA
The architecture of cells and the tissue they form within multicellular organisms are highly complex and dynamic. Cells optimize their function within tissue microenvironments by expressing specific subsets of RNAs. Advances in cell tagging methods enable spatial understanding of RNA expression when merged with transcriptomics.
View Article and Find Full Text PDFMetabolic Tagging Technology of Exosomes- An Updated Review.
Curr Pharm Des
January 2025
Centre for Research Impact & Outcome, Chitkara College of Pharmacy, Chitkara University, Rajpura 140401, Punjab, India.
Exosomes are small extracellular vesicles secreted by various cell types, playing a crucial role in intercellular communication by carrying proteins, lipids, and nucleic acids, thus holding significant potential in diagnostics and therapeutics. Accurate labeling of exosomes is vital for studying their biogenesis, trafficking, and functional properties, enabling precise tracking and manipulation. This review examines current labeling techniques, including metabolic glycan labeling, chemical tagging, membrane fluorescent dyes, bio-conjugation, non-covalent labeling, and cell-engineering approaches.
View Article and Find Full Text PDFNonapoptotic caspase-3 guides C1q-dependent synaptic phagocytosis by microglia.
Nat Commun
January 2025
Department of Translational Neurobiology, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8502, Japan.
Caspases are known to mediate neuronal apoptosis during brain development. However, here we show that nonapoptotic activation of caspase-3 at presynapses drives microglial synaptic phagocytosis. Real-time observation and spatiotemporal manipulation of synaptic caspase-3 in the newly established, mouse-derived culture system demonstrate that increased neuronal activity triggers localized presynaptic caspase-3 activation, facilitating synaptic tagging by complements.
View Article and Find Full Text PDFIdentification of hypothermia-inducing neurons in the preoptic area and activation of them by isoflurane anesthesia and central injection of adenosine.
J Physiol Sci
January 2025
Department of Physiology, Graduate School of Medical and Dental Sciences, Kagoshima University, Sakuragaoka 8-35-1, 890-8544, Kagoshima, Japan. Electronic address:
Hibernation and torpor are not passive responses caused by external temperature drops and fasting but are active brain functions that lower body temperature. A population of neurons in the preoptic area was recently identified as such active torpor-regulating neurons. We hypothesized that the other hypothermia-inducing maneuvers would also activate these neurons.
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