Approach | Purpose | Reference |
---|---|---|
Targeted ctDNA approaches | ||
Digital PCR, BEAMing (beads, emulsion, amplification, and magnetics) | Detection of specific mutations | |
PARE (personalized analysis of rearranged ends) | Detection of specific structural chromosomal rearrangements | |
Gene panels, TAm-Seq (tagged amplicon deep sequencing), CAPP-Seq (cancer personalized profiling by deep sequencing), Safe-SeqS (Safe-Sequencing System) | Detection of mutations in a predefined gene panel | |
Untargeted ctDNA approaches | ||
Whole-exome sequencing | Analysis of all protein coding genes; copy number alterations | [20] |
Whole-genome sequencing | Copy number alterations; dependent on sequence depth identification of mutations | |
Circulating tumor cells | ||
Whole-exome sequencing | Analysis of all protein coding genes; copy number alterations | |
Whole-genome sequencing; array-CGH | Copy number alterations | |
In situ RNA-FISH | Detection of specific transcripts | [37] |
qRT-PCR | Evaluation of specific transcripts | [40] |
Microfluidics, Arrays | Transcriptional profiling | |
Exosomes | ||
DNA | Tumor genome profiling | |
RNA | Transcription profiling | |
Protein | Protein marker analysis | [50] |