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Citrullinated Autoantigen-Specific T and B Lymphocytes in Rheumatoid Arthritis: Focus on Follicular T Helper Cells and Expansion by Coculture.
ACR Open Rheumatol
January 2025
ISAR Bioscience GmbH, Planegg, Germany.
Objective: Rheumatoid arthritis (RA) is characterized by circulating anti-cyclic citrullinated peptide (CCP) autoantibodies (ACPAs), resulting in inflammation of the joints and other organs. We have established novel assays to assess immune cell subpopulations, including citrullinated antigen-specific (CAS) autoreactive B and T lymphocytes, in patients with RA.
Methods And Results: We found that activated CD25 T cells were markedly increased in patients with RA compared to healthy controls.
Dynamic Kinetic Resolution-Based Asymmetric Transfer Hydrogenation of Racemic 2-Substituted Quinolines.
J Am Chem Soc
January 2025
Faculty of Pharmaceutical Sciences, Shenzhen University of Advanced Technology, Shenzhen 518107, China.
The synthesis of chiral tetrahydroquinolines (THQs) has garnered significant interest from medicinal chemists due to their frequent presence as pharmacophores in bioactive compounds. While existing synthetic methods have primarily focused on THQs with single or multiple endocyclic chiral centers, the selective construction of THQs with both and cyclic chiral centers remains a significant challenge that requires further development. This study introduces a dynamic kinetic resolution (DKR)-based transfer hydrogenation of racemic 2-substituted quinolines, which yields structurally novel chiral THQs with consecutive and cyclic chiral centers in excellent yields and stereoselectivities (59 examples, with generally >20:1 dr and >90% ee, up to three consecutive stereocenters).
View Article and Find Full Text PDFSeasonal role of a specialist predator in rodent cycles: Ermine-lemming interactions in the High Arctic.
Ecology
January 2025
Département de Biologie & Centre d'Études Nordiques, Université Laval, Québec, Quebec, Canada.
The exact mechanisms behind population cycles remain elusive. An ongoing debate centers on whether predation by small mustelids is necessary and sufficient to generate rodent cycles, as stipulated by the specialist predator hypothesis (SPH). Specifically, the SPH predicts that the predator should respond numerically to the abundance of its prey with a delay of approximately one year, leading to delayed density-dependence in the dynamics of the prey population.
View Article and Find Full Text PDFLight-Driven CO Fixation into Epoxides Using an AlO/CoAlO Composite Photocatalyst.
Inorg Chem
January 2025
Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata (IISER Kolkata), Campus Rd, Mohanpur, Haringhata Farm, West Bengal 741246, India.
Utilization of carbon dioxide (CO) as a C1 feedstock to synthesize value-added chemicals using a catalyst made from earth-abundant elements and under mild conditions is a sustainable approach toward carbon neutrality but difficult to achieve. Herein, the CoAlO/AlO composite catalyst is developed and used for the light-driven epoxide to value-added cyclic carbonate conversion using CO. CoAlO/AlO composite catalysts (% Co-AlO) are prepared by calcining cobalt-incorporated Al-oxy-hydroxide at 500 °C under an air atmosphere.
View Article and Find Full Text PDFHighly sensitive and catalytic electrochemical aptamer-based biosensor for β-lactoglobulin via coupling redox recycling background minimization with DNAzyme amplification.
Anal Chim Acta
February 2025
Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, PR China. Electronic address:
Background: β-lactoglobulin (β-Lg), a major allergen in dairy products, can trigger severe allergic reactions and even fatal outcomes in infants. In this work, we develop a new low background current redox recycling strategy by conjugating the electrochemical mediator to trimetallic hybrid nanoparticles (NPs)-dispersed graphene as the signal tag, which is coupled with DNAzyme amplifications to construct highly catalytic and ultrasensitive β-Lg aptasensor.
Results: Target β-Lg molecules bind aptamers in DNAzyme/aptamer duplexes to release active DNAzymes to initiate cyclic cleavage of hairpin substrates.
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