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Correlation between circulating mutant DNA and metabolic tumour burden in advanced non-small cell lung cancer patients

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BACKGROUND: Mutated circulating cell-free DNA (cfDNA) has been suggested as a surrogate marker of tumour burden and aggressiveness of disease. We examined the association between the level of plasma mutant cfDNA and metabolic tumour burden (MTB) measured by (18)F-fluoro-D-glucose positron emission tomography/computed tomography ((18)F-FDG PET/CT). Furthermore, the presence of mutant cfDNA was correlated with patient survival.

METHODS: Forty-six advanced non-small cell lung cancer (NSCLC) patients were included. At the time of inclusion, blood sampling and a PET/CT scan were performed. cfDNA was isolated and next-generation sequencing (NGS) was performed (Ion AmpliSeq Colon and Lung Cancer panel v2). MTB was defined by a volumetric PET parameter.

RESULTS: NGS succeeded in 41 patients. Mutations were detected in the blood of 24 patients. A significant correlation between the allele frequency of the most frequent mutation and MTB was found (P=0.001). Patients with detectable mutated cfDNA had a significantly shorter median overall survival compared with patients without (3.7 versus 10.6 months, P=0.019). This impact on survival was independent of the MTB.

CONCLUSIONS: Level of mutated cfDNA tends to correlate with MTB in advanced-stage NSCLC patients. Patients with detectable mutant DNA in plasma had an inferior survival, indicating that this could be an important predictor of survival.

Original languageEnglish
JournalB J C
Pages (from-to)704-709
Number of pages6
Publication statusPublished - 22 Aug 2017

    Research areas

  • Aged, Aged, 80 and over, Biomarkers, Tumor, Carcinoma, Non-Small-Cell Lung, DNA, Neoplasm, Female, Fluorodeoxyglucose F18, Gene Frequency, Glycolysis, Humans, Lung Neoplasms, Male, Middle Aged, Mutation, Positron Emission Tomography Computed Tomography, Radiopharmaceuticals, Retrospective Studies, Survival Rate, Journal Article

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