Peripheral T-cell Lymphoma Clinical Trial
Official title:
Next-Generation Sequencing-based, Tumor- and Plasma-informed Droplet Digital PCR Assay for Detection of Circulating Tumor DNA in Peripheral T-cell Lymphomas
The aim of this study is to evaluate the feasibility of circulating tumor DNA (ctDNA) measurement in blood plasma for the applicability in prognostication, treatment evaluation and measurable residual disease (MRD) surveillance in a cohort of patients with newly diagnosed or relapsed/refractory peripheral T-cell lymphomas (PTCL).
In this observational prospective cohort study the investigators want to test the use of minimal-invasive liquid biopsies (blood plasma) for the detection of ctDNA in patients with newly diagnosed or relapsed/refractory PTCL. In each enrolled patient a diagnostic tumor-containing tissue biopsy as well as a baseline plasma sample will be subject to targeted next-generation sequencing (NGS) with the aim of identifying tumor-specific genetic alterations and clonal T-cell receptor rearrangements. This testing will be performed on biopsies that have been obtained as a part of standard-of-care diagnostic evaluation for PTCL and no further invasive biopsies will be performed. Based on the NGS-analysis, a droplet digital polymerase chain reaction (ddPCR) assay will be designed for each patient. ddPCR will be used to detect ctDNA in plasma at diagnosis and later at defined time points during treatment and in the follow-up period. At the same defined time points PET/CT scans will be performed for later comparative analysis. PTCL patients routinely have PET/CT scans performed before the start of treatment, mid-treatment, at the end of treatment and after hematopoietic stem cell transplant when applicable. PET/CT scans will be conducted every 6 months for the first 2 years of routine follow-up. Active patient participation (i.e. blood sampling for ctDNA analysis and PET/CT scans) is expected to last up to 27 months from inclusion. Follow-up for survival analysis will be done for up to 5 years from inclusion. The investigators hypothesize that the NGS-based tumor- and plasma-informed ddPCR assay applied in this study, will provide a highly sensitive and specific tool for prognostication, response evaluation and detection of relapse in patients with PTCL. ;
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