Journal: bioRxiv
Article Title: Molecular determinants of antibody-mediated priming to enhance detection of ctDNA
doi: 10.64898/2026.01.27.701975
Figure Lengend Snippet: A) Degradation of free dsDNA and dsDNA in mononucleosomes in presence of 0.2U/mL of DNase I and mAb priming agents. IgG2a is an unrelated control antibody. Each dot represents the mean of two replicates. B) Experimental approach for testing impact of priming agents on clearance of free dsDNA and MN. C) Percentage of W601 DNA remaining in plasma 1 hour after injection of W601 either in free dsDNA form (left) or as MN (right), with or without dsDNA binding and MN binding priming agents. D) Percentage of cfDNA isolated from mouse plasma by various priming agents via immunoprecipitation using mAb-coupled magnetic beads, adjusted for background binding to beads alone. E) Percentage of cfDNA, W601 free dsDNA, W601 MN, and W601 MN with mild DNase I treatment isolated from mouse plasma using each MN-only mAb priming agent. F) cfDNA fragment length distribution in mice (n=8) with dashed lines at 167bp and 147bp (left) and percent of fragments <=147 bp and <=167 bp (right). * p < 0.05, ** p < 0.01, *** p < 0.001, ns - not significant.
Article Snippet: Free dsDNA or MN (cat. 16-0009, 18-0006 respectively, Epicypher) was prepared at final DNA concentration of 4ng/uL and incubated with mAbs at 400nM at 37°C in 37 μL DNase buffer (B0303S, New England Biolabs) for 5 min.
Techniques: Control, Clinical Proteomics, Injection, Binding Assay, Isolation, Immunoprecipitation, Magnetic Beads