Fig. 1.

Workflow optimization for biopsy genomic profiling, tissue and CTCs. Qiagen QIAamp Micro Kit and GeneRead DNAseq targeted panel sequencing were applied on all types of cell samples. This overall workflow performs well when DNA amount is sufficient, i.e., from whole blood and tissue biopsy. For rare cells, DNA input is insufficient for targeted NGS, leading to a bias and the need for an extra step of Whole Genome Amplification (WGA). Two WGA kits were evaluated (WGA4 from Sigma and REPLI-g from Qiagen) and obtained low coverage for fixed cells, while REPLI-g was identified as optimal for fresh rare cells and used for a final validation on patient CTCs