Genomic instability of tumor cells has been associated with a poor prognosis. However, impaired DNA repair pathways leading to genomic instability are also described to increase tumor sensitivity to DNA damaging agents. A comprehensive Genomic Change Index (GCI) as an indicator of defective DNA repair is proposed as a potential predictor of cytotoxic chemotherapy (chemo) response.
Prostate cancer (PrCa) is the most frequent non-dermatological malignancy in the male population. Genomic instability resulting in copy number variation (CNV) is a hallmark of malignant transformation.
Researchers from Chronix Biomedical and The University of Texas MD Anderson Cancer Center announced results from a pilot study demonstrating the utility of cell-free DNA (cfDNA) blood tests as a companion diagnostic for breast cancer patients at the American Society of Clinical Oncology Annual Meeting (ASCO 2013).
Tumor cell-free DNA (cfDNA) has the potential to provide minimally invasive patient specific biomarkers to monitor tumor burden. Gains and losses of chromosomal regions - as a hallmark of cancer - have been detected in plasma as copy number aberrations (CNAs), and for several cancers a relation to tumor size has been reported.