Please use this identifier to cite or link to this item: http://ahro.austin.org.au/austinjspui/handle/1/16890
Title: Digital PCR of genomic rearrangements for monitoring circulating tumour DNA
Authors: Do, Hongdo
Cameron, Daniel
Molania, Ramyar
Thapa, Bibhusal
Rivall, Gareth
Mitchell, Paul L
Murone, Carmel
John, Thomas
Papenfuss, Anthony
Dobrovic, Alexander
Date of Publication: 18-Oct-2016
Citation: Advances in Experimental Medicine and Biology 2016; 924:139-146
Abstract: Identifying circulating tumour DNA (ctDNA) for monitoring of cancer therapy is dependent on the development of readily designed, sensitive cancer-specific DNA markers. Genomic rearrangements that are present in the vast majority of cancers provide such markers.Tumour DNA isolated from two fresh-frozen lung tumours underwent whole genome sequencing. Genomic rearrangements were detected using a new computational algorithm, GRIDSS. Four genomic rearrangements from each tumour were chosen for further study using rearrangement-specific primers. Six of the eight rearrangements tested were identified as tumour-specific, the remaining two were present in the germline. ctDNA was quantified using digital PCR for the tumour genomic rearrangements in patient blood. Interestingly, one of the patients had no detectable ctDNA either prior to or post surgery although the rearrangements were readily detectable in the tumour DNA.This study demonstrates the feasibility of using digital PCR based on genomic rearrangements for the monitoring of minimal residual disease. In addition, whole genome sequencing provided further information enabling therapeutic choices including the identification of a cryptic EGFR exon 19 deletion in one patient and the identification of a high somatic mutation load in the other patient. This approach can be used as a model for all cancers with rearranged genomes.
URI: http://ahro.austin.org.au/austinjspui/handle/1/16890
DOI: 10.1007/978-3-319-42044-8_27
ORCID: 0000-0003-3414-112X
PubMed URL: https://www.ncbi.nlm.nih.gov/pubmed/27753035
Type: Journal Article
Subject: Droplet digital PCR
Genomic rearrangement
Liquid biopsy
Lung cancer
Whole genome sequencing
Appears in Collections:Journal articles

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