Figure 1 | Scientific Reports

Figure 1

From: Time-saving method for directly amplifying and capturing a minimal amount of pancreatic tumor-derived mutations from fine-needle aspirates using digital PCR

Figure 1

Experimental results using cell lines to improve the dPCR method for the highly sensitive mutation analysis of simple prepared samples. (A) Encapsulated cells in dPCR droplets. Cells were collected, resuspended in dPCR reaction solution, and mixed with droplet generation oil using the QX200 droplet generator. Scale bars; 200Ā Ī¼m. (B) Cells were burst using pure water. Cells were collected and resuspended in nuclease-free water, which caused an osmotic burst of cells, and genomic DNA was released into the water. The ā€œcrudeā€ solution, including gDNA, was used as the dPCR template. Scale bars; 500Ā Ī¼m. (C) The DPCR assay was performed using the two novel DNA preparation methods, without a purification step. KRAS wild-type (Fibroblast; NB1RGB) and KRAS G12C (PDA; MIAĀ PaCa-2) cells were mixed with several dilution series (left panel). The wild-type or G12C mutation in KRAS was detected using the QX200 droplet reader, as compared to the conventional DNA preparation method using commercial purification kits (see details in ā€œMethodsā€). The KRAS copy number of wild-type or G12C measured by QuantaSoft software (right panel).

Back to article page