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Probing the Effects of Chemical Modifications on Anticoagulant and Antiproliferative Activity of Thrombin Binding Aptamer.
Int J Mol Sci
December 2024
Department of Pharmacy, University of Naples Federico II, 80131 Napoli, Italy.
Thrombin binding aptamer (TBA) is one of the best-known G-quadruplex (G4)-forming aptamers that efficiently binds to thrombin, resulting in anticoagulant effects. TBA also possesses promising antiproliferative properties. As with most therapeutic oligonucleotides, chemical modifications are critical for therapeutic applications, particularly to improve thermodynamic stability, resistance in biological environment, and target affinity.
View Article and Find Full Text PDFDeciphering ligand and metal ion dependent intricate folding landscape of Vc2 c-di-GMP riboswitch aptamer.
Nucleic Acids Res
January 2025
Advanced Analysis Data Center, Korea Institute of Science and Technology, Hwarang-ro 14-5, Seongbuk-gu, Seoul 02792, Republic of Korea.
Riboswitches are RNAs that recognize ligands and regulate gene expression. They are typically located in the untranslated region of bacterial messenger RNA and consist of an aptamer and an expression platform. In this study, we examine the folding pathway of the Vc2 (Vibrio cholerae) riboswitch aptamer domain, which targets the bacterial secondary messenger cyclic-di-GMP.
View Article and Find Full Text PDFDevelopment of a mertansine-specific DNA aptamer and novel high-throughput sandwich enzyme-linked oligonucleotide assay for quantification and characterization of trastuzumab emtansine.
Biosens Bioelectron
March 2025
Laboratory of Analytical and Bio-Analytical Chemistry, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, 422-8526, Japan. Electronic address:
We developed a novel DNA aptamer, D8#24S1, which specifically recognizes mertansine (DM1), the cytotoxic payload of the antibody-drug conjugate (ADC) trastuzumab emtansine (T-DM1), and applied it for T-DM1 analysis. D8#24S1 was obtained through SELEX and was shown to specifically recognize DM1 with high affinity (dissociation constant, K = 84.2 nM).
View Article and Find Full Text PDFWTAP, a conserved mA writer, can promote the antiviral immunity of Miichthysmiiuy.
Dev Comp Immunol
January 2025
Laboratory of Fish Molecular Immunology, College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, China; National Pathogen Collection Center for Aquatic Animals, Shanghai Ocean University, China; Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, China. Electronic address:
N6-methyladenosine (mA) is one of the most prevalent modifications found in eukaryotic mRNA and has been implicated in the regulation of cell proliferation, development, invasion, apoptosis, and immunity. In this study, we first conducted a structural and evolutionary analysis of Wilms' tumour 1-associating protein (WTAP) in vertebrates, and the results showed that WTAP in vertebrates is conserved particularly in mammals and fish. We subsequently investigated the involvement of WTAP in the antiviral immune response of fish and discovered that the expression of Miichthys miiuy (mmiWTAP) decreased in response to stimulation with Siniperca chuatsi rhabdovirus (SCRV) and poly(I:C).
View Article and Find Full Text PDF[Construction of a 17-estradiol sensor based on a magnetic graphene oxide/aptamer separating material].
Se Pu
January 2025
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
17-Estradiol (E2) is a natural steroidal estrogen essential for a variety of physiological functions in organisms. However, external E2, which is renowned for its potent biological effects, is also considered to be an endocrine-disrupting compound (EDC) capable of disturbing the normal operation of the endocrine system, even at nanogram-per-liter (ng/L) concentrations. Studies have revealed that medical and livestock wastewater can be contaminated with E2, which poses potential risks to human health.
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