Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz

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SHR Neuro Krebs Kardio Lipid Stoffw Microb

Suppan, C; Brcic, I; Tiran, V; Mueller, HD; Posch, F; Auer, M; Ercan, E; Ulz, P; Cote, RJ; Datar, RH; Dandachi, N; Heitzer, E; Balic, M.
Untargeted Assessment of Tumor Fractions in Plasma for Monitoring and Prognostication from Metastatic Breast Cancer Patients Undergoing Systemic Treatment.
Cancers (Basel). 2019; 11(8): Doi: 10.3390/cancers11081171 [OPEN ACCESS]
Web of Science PubMed PUBMED Central FullText FullText_MUG


Führende Autor*innen der Med Uni Graz
Dandachi Nadia
Heitzer Ellen
Suppan Christoph
Co-Autor*innen der Med Uni Graz
Auer Martina
Balic Marija
Brcic Iva
Ercan Erkan
Müller Hannah Deborah
Posch Florian
Tiran Verena
Ulz Peter

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The aim of this study was to assess the prognostic and predictive value of an untargeted assessment of tumor fractions in the plasma of metastatic breast cancer patients and to compare circulating tumor DNA (ctDNA) with circulating tumor cells (CTC) and conventional tumor markers. In metastatic breast cancer patients (n = 29), tumor fractions in plasma were assessed using the untargeted mFAST-SeqS method from 127 serial blood samples. Resulting z-scores for the ctDNA were compared to tumor fractions established with the recently published ichorCNA algorithm and associated with the clinical outcome. We observed a close correlation between mFAST-SeqS z-scores and ichorCNA ctDNA quantifications. Patients with mFAST-SeqS z-scores above three (34.5%) showed significantly worse overall survival (p = 0.014) and progression-free survival (p = 0.018) compared to patients with lower values. Elevated z-score values were clearly associated with radiologically proven progression. The baseline CTC count, carcinoembryonic antigen (CEA), and cancer antigen (CA)15-5 had no prognostic impact on the outcome of patients in the analyzed cohort. This proof of principle study demonstrates the prognostic impact of ctDNA levels detected with mFAST-SeqS as a very fast and cost-effective means to assess the ctDNA fraction without prior knowledge of the genetic landscape of the tumor. Furthermore, mFAST-SeqS-based ctDNA levels provided an early means of measuring treatment response.

Find related publications in this database (Keywords)
metastatic breast cancer (MBC)
circulating tumor cells (CTCs)
cell free circulating tumor DNA (ctDNA)
treatment response
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