Journal: Frontiers in Microbiology
Article Title: Development and optimization of host DNA depletion in blood cultures using a saponin and salt-activated nuclease-based method
doi: 10.3389/fmicb.2026.1784408
Figure Lengend Snippet: Overview of the experimental design. (A) Testing different concentrations of saponin (2%–5%) to observe the lysis of host cells and bacterial cells. (B) Host DNA depletion of Escherichia coli and Staphylococcus aureus blood cultures using saponin and various concentrations of salt-activated endonucleases (SAN), followed by DNA extraction. (C) Assessing the effect of different salt concentrations on SAN activity. (D) The final optimized protocol uses 4% saponin, 10 μL (250 U) of HL-SAN, 2.5 M NaCl, and 50 mM MgCl 2 for effective host DNA depletion. * indicates methodology where the following concentrations were tested: 2 vs. 2.5 M NaCl + 50 mM MgCl 2 , 2.5 M NaCl + 15 vs. 50 mM MgCl 2 , 0.5 M NaCl + 15 mM MgCl 2 vs. 2.5 M NaCl + 50 mM MgCl 2 (Created with BioRender.com ).
Article Snippet: The host DNA depletion in blood cultures was carried out by treating the blood cultures with 4% saponin, followed by the addition of HL-SAN (Catalog no. 70910-202) and M-SAN (Catalog no. 70950-202) (ArcticZymes Technologies, Norway).
Techniques: Lysis, DNA Extraction, Activity Assay