Using a ctDNA liquid biopsy assay for post-surgical serial monitoring and early detection of disease progression in advanced colorectal cancer patients

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26475821%3A_____%2F19%3AN0000006" target="_blank" >RIV/26475821:_____/19:N0000006 - isvavai.cz</a>

Result on the web

<a href="https://cancerres.aacrjournals.org/content/79/13_Supplement/405" target="_blank" >https://cancerres.aacrjournals.org/content/79/13_Supplement/405</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Using a ctDNA liquid biopsy assay for post-surgical serial monitoring and early detection of disease progression in advanced colorectal cancer patients

Original language description

Poster at AACR, Atlanta; Meeting Abstract: 405 Volume: 79 Issue: 13 DOI: 10.1158/1538-7445.AM2019-405, WOS:000488129902074: ctDNA liquid biopsy has been recognized as a useful approach to monitor effect of ongoing cancer treatment. The ctDNA dynamics is reflecting the overall tumor burden. Here we present a utility of a simple ctDNA assay for longitudinal monitoring of patients with advanced stages of colorectal cancer in conjunction with surgical treatment. In a prospective setting the disease course of a total of 121 patients in Stage III and IV of colorectal cancer was monitored by ctDNA. A panel of somatic mutations was initially screened in primary and/or metastatic tissue. The found mutations were then traced in ctDNA from plasma acquired before surgery and during the subsequent days and months. In a subgroup of rectal cancers ctDNA was also analyzed prior and during the neoadjuvant chemoradiotherapy. The ctDNA levels were then correlated to the clinical parameters such as surgical radicality, disease relapse or response to anticancer therapy.A high correlation between the surgical radicality and appearance or absence of ctDNA after surgery was confirmed with 22 of 24 patients with R0 resection as ctDNA negative and 22 of 30 patients with R1/R2 resection as ctDNA positive. Of the 30 ctDNA-negative patients following surgery, 4 patients had ctDNA-detectable progression during the first 9 months and 12 during the next 14 months. At 4 occasions the ctDNA has outperformed CT imaging in detecting the progression. The anti-angiogenic therapy resulted in disappearance or decrease of ctDNA levels in 6 patients during the first month of treatment. In a subgroup of rectal cancers, neoadjuvant chemoradiotherapy resulted in rapid decrease of ctDNA already in the first week of administration. Conclusion: The ctDNA dynamics closely follows clinical course of disease and may serve as a useful biomarker in post-operative follow-up.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

30204 - Oncology

Project

<a href="/en/project/NV15-27939A" target="_blank" >NV15-27939A: Benefit of new "liquid biopsy" technology for monitoring of complex treatment of colorectal carcinoma in stage 3 and 4.</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů