For the first time a randomised trial has demonstrated improved overall survival in the most common type of leukaemia.
New landmark data indicates that adding MabThera (rituximab) to chemotherapy could extend life and double remission rates.
The data, presented at the American Society of Hematology (ASH) annual meeting, demonstrate that the addition of MabThera to chemotherapy in previously untreated patients with chronic lymphocytic leukaemia (CLL) significantly improves chances of survival.
The same trial showed that the addition of rituximab to chemotherapy doubles the number of patients achieving complete remission and lengthens the period of time before the disease returns by more than 1.6 years, compared to chemotherapy alone.
Professor Peter Hillmen, Consultant Haematologist, Leeds Teaching Hospitals NHS Trust, commented: “Never before have we seen proof that any treatment has led directly to improved overall survival in CLL. The combination of rituximab and fludarabine-based chemotherapy has proven to be a formidable partnership, sending more patients into remission, extending the period before their leukaemia returns and now increasing the length of time people survive overall. This is certainly one of the most significant steps forward we have seen in this area for a long time.”
In the CLL8 clinical trial, the number of people still living after an average observation time of 36 months was 87.2% in the rituximab plus fludarabine cyclophosphamide (R-FC) arm, versus 82.5% in the FC arm.
In a separate UK-only study, also presented at ASH, rituximab was trialled in combination with chlorambucil chemotherapy in previously untreated CLL patients. Chlorambucil is the first-line treatment option for patients who cannot tolerate a more intensive treatment regimen.
The interim results from this study indicate that adding rituximab improves the overall response rate by 17.3% compared to historical data from patients in another UK study (CLL4) who received chlorambucil alone.
Professor Hillmen, lead investigator for the CLL208 trial, explained: “The interim results are very encouraging, showing a significant increase in the overall response rate. With further analysis this could potentially offer this patient group – up to half of all CLL patients – the chance to benefit from the increased efficacy rituximab has shown with other chemotherapy combinations.”
Rituximab is licensed to treat all patients with CLL who require chemotherapy combination treatment. It has received positive recommendations from NICE and the Scottish Medicines Consortium (SMC) for first-line use in combination with FC chemotherapy and is currently undergoing appraisal with both institutions for its extended licence in relapsed and refractory CLL patients.
Jane Barnard, Chair of the CLL Support Association, commented: “This year has been exceptional in terms of advances in treatment for people with CLL. The fact that we are now at a stage where we can see improved overall survival is incredible and this news offers real hope to the many thousands of people living with this condition in the UK.”
