Overall survival after CDK4/6 inhibitor dose reduction in women with metastatic breast cancer.

Background: Breast cancer is the most common cancer in women, and the first-line treatment for patients with hormone-receptor positive/HER2-negative metastatic breast cancer is CDK4/6 inhibitor plus endocrine therapy. Understanding the impact of CDK4/6 inhibitor dose reduction, which occurs in about half of the patients, is important.

Methods: This real-world cohort study is based on electronic health records from Capital Region of Denmark.

New pathogenic germline variants identified in mesothelioma.

Background: Mesothelioma (MM) is associated with asbestos exposure, tumor heterogeneity and aggressive clinical behavior. Identification of germline pathogenic variants (PVs) in mesothelioma is relevant for identifying potential actionable targets and genetic counseling.

Methods: 44 patients underwent whole exome sequencing (WES) or whole genome sequencing (WGS).

High frequency of pathogenic germline variants within homologous recombination repair in patients with advanced cancer.

Genomic screening of cancer patients for predisposing variants is traditionally based on age at onset, family history and type of cancer. Whereas the clinical guidelines have proven efficient in identifying families exhibiting classical attributes of hereditary cancer, the frequency of patients with alternative presentations is unclear. We identified and characterized germline variants in 636 patients with advanced solid cancer using whole exome sequencing.

Application of cell-free DNA for genomic tumor profiling: a feasibility study.

Purpose: Access to genomic tumor material is required to select patients for targeted therapies. However, tissue biopsies are not always feasible and therefore circulating cell-free DNA (cfDNA) has emerged as an alternative. Here we investigate the utility of cfDNA for genomic tumor profiling in the phase I setting.

Copenhagen Prospective Personalized Oncology (CoPPO)-Clinical Utility of Using Molecular Profiling to Select Patients to Phase I Trials.

Purpose: We evaluated the clinical benefit of tumor molecular profiling to select treatment in the phase I setting.

Experimental Design: Patients with advanced solid cancers and exhausted treatment options referred to a phase I unit were included in a prospective, single-center, single-arm open-label study (NCT02290522). Tumor biopsies were obtained for comprehensive genomic analysis including whole-exome sequencing and RNA sequencing.

Circulating tumor DNA as a marker of treatment response in BRAF V600E mutated non-melanoma solid tumors.

Purpose: We evaluated longitudinal tracking of BRAF V600E in circulating cell-free DNA (cfDNA) as a marker of treatment response to BRAF inhibitor (BRAFi) combination therapies in non-melanoma solid tumors included in the Copenhagen Prospective Personalized Oncology (CoPPO) program.

Experimental Design: Patients with BRAF V600E-mutated tumors were treated with combination therapies including BRAFi. Quantification of mutant cfDNA from plasma was determined and correlated to clinical outcomes.

Personalized oncology: genomic screening in phase 1.

Improvements in cancer genomics and tumor biology have reinforced the evidence of cancer development driven by numerous genomic alterations. Advanced genomics technology can be used to characterize genomic alterations that potentially drive tumor growth. With the possibility of screening thousands of genes simultaneously, personalized molecular medicine has become an option.