Diffuse Large B Cell Lymphoma Clinical Trial
Official title:
Prospective Study of Circulating Tumor DNA Kinetics Post R-CHOP Type Treatment of Diffuse Large B Cell Lymphoma
The purpose of this study is to determine the kinetics of circulating tumor DNA (ctDNA) in the hours following initial administration of immuno-chemotherapy to patients with diffuse large B cell lymphoma (DLBCL). Modelizing the short-term kinetics of ctDNA would help to determine the optimal time-point for ctDNA follow-up. The investigators hypothesize that the greater ctDNA release at this time-point compared to baseline might lead lead to the detection of novel variants compared to baseline.
ctDNA in diffuse large B cell lymphoma (DLBCL) has become an essential dynamic biomarker. Due to its short half-life, ctDNA is a real-time reflection of tumoral evolution and is a non-invasive biomarker that can be used for patient evaluation and follow-up. The quantity of ctDNA before treatment is correlated with tumoral mass, international prognostic index (IPI) and prognosis. The principal mechanism of ctDNA release is tumor cell apoptosis and it is well established that tumor cell apoptosis is observed in the hours following immuno-chemotherapy. However, the kinetics of ctDNA concentration in the hours following immuno-chemotherapy administration is unknown. Modelizing the kinetics of ctDNA during this early timeframe could help to better predict chemo-sensitivity and better reflect genetic heterogeneity of the tumor, through release of a larger quantity of ctDNA compared to baseline. ;
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