Design and Validation of Plasma Proteins and Cytokine Panels to Identify Markers Associated With Response to Niraparib as Maintenance Treatment After First-line Platinum-based Regimen in Patients With Advanced Ovarian Cancer

PARPi inhibitors have been incorporated into managing first-line advanced ovarian cancer with different approvals depending on homologous recombination (HR) status. Niraparib has received approval independent from HR status. Although the benefit is more remarkable in HR-deficient patients, there is no biomarker to predict sustained response to niraparib at the start of treatment helping the clinician to make decisions among the different treatment options. The aim of the LIBINI-1 (Liquid biopsy for predicting niraparib benefit if 1st line) study is to identify predictive biomarkers of sustained response to niraparib using liquid biopsy with two different technologies: 1. Proteomic and secretome analysis tools. The first part of the LIBINI-1 project is to create a platform for rapid screening and analysis by multiple detections of niraparib response-associated proteins in patients with advanced ovarian cancer. 2. ctDNA analysis. The second part of the LIBINI-1 project is to correlate the baseline level of ctDNA and change in ctDNA at 4 and 12 weeks with the benefit to niraparib.