CAR T cells therapy has transformed the prognostic of relapsed/refractory large B cells lymphomas. Relapse however is still high and multiple causes have been studied. CAR expansion seems to be necessary to for response and lymphodepletion type and exposure, notably to fludarabine, associated with expansion and response.
The aim of the study is to analyse prospectivaly Fludarabine and cyclophosphamide exposure and correlate exposure to expansion, therapeutic response and survival.
Adult patient aged 18 years and older
Treated with commercial CAR T-cells (Lisocabtagene maraleucel, Tisagenlecleucel, or Axicabtagene ciloleucel), with standard lymphodepletion consisting of Fludarabine and Cyclophosphamide
Presenting with aggressive large B-cell lymphoma that is refractory or has relapsed after at least one line of treatment
Creatinine clearance > 50 ml/min (Cockcroft CKD-EPI)
Weight ≤ 50 kg
Out-of-specification reinfusion product
Individual participating in another study with an ongoing exclusion period at the time of inclusion
Person under guardianship or curatorship, or deprived of liberty by judicial or administrative decision