"I was delighted to take part in a clinical trial as it has the potential to really help others in the future.”
A trial looking at ofatumumab for chronic lymphocytic leukaemia
We know that this is an especially worrying time for people with cancer and their family and friends. We have separate information about coronavirus and cancer. Please read that information alongside this page. We will update that information as guidance changes.
This trial compared a drug called ofatumumab with other standard treatments for chronic lymphocytic leukaemia.
It was for people who had:
- leukaemia that had got worse or come back despite having fludarabine
More about this trial
Doctors can treat chronic lymphocytic leukaemia (CLL) with chemotherapy. One of the drugs they use is fludarabine. But sometimes the leukaemia gets worse or comes back after treatment.
Doctors are looking for ways to improve treatment for this group of people. In this trial, they looked at a drug called ofatumumab.
Ofatumumab is a type of targeted drug called a monoclonal antibody. It targets a particular protein on the surface of CLL cells. The ofatumumab sticks to the protein and helps the
This trial compared ofatumumab with other
- a targeted drug called alemtuzumab and a
- a targeted drug called rituximab
The aims of the trial were to:
- find out how well ofatumumab worked compared to standard treatments
- find out how well long term ofatumumab worked
- learn more about the side effects
Summary of results
The researchers found that ofatumumab didn’t work better than standard treatments for this group of people. But in those who went on to have long term ofatumumab, it did seem to help.
This was a phase 3 trial. The researchers published the results in 2016.
122 people joined the trial. They were 2 times more likely to have ofatumumab than standard treatment.
Everyone was put into 1 of 2 groups at random, and:
- 79 had ofatumumab (group 1)
- 43 had standard treatments (group 2)
People who had standard treatment (group 2) could go on to have ofatumumab if their leukaemia got worse. A total of 22 people in this group went on to have ofatumumab.
In people who had ofatumumab (group 1), 37 people’s leukaemia hadn’t got worse when they finished treatment. They were then put into 1 of 2 groups at random, and:
- 24 had ofatumumab for a further 6 months (long term treatment)
- 13 didn’t have further ofatumumab
The researchers compared ofatumumab with standard treatment. They looked at the average length of time people lived:
- without their leukaemia getting worse
- after treatment (overall survival)
They found no difference in either of these.
Long term ofatumumab
The researchers also looked at how well treatment worked in people who went on to have long term treatment with ofatumumab. This is the group who went on to have a further 6 months of treatment.
They looked at the average length of time people lived without their leukaemia getting worse. Not unsurprisingly, this was a bit better in patients who had more treatment. It was:
- 5.6 months in people who had ofatumumab
- 3.5 months in people who had no further treatment
However, there was no significant difference in the average length of time people lived after treatment. This is called overall survival and this was
- 25.4 months in people who had ofatumumab
- 17.8 months in people who had no further treatment
The side effects in people who had ofatumumab compared with standard treatments were similar.
The most common included:
- an increased risk of infection
- tiredness and breathlessness (anaemia)
- a serious complication of an infection (sepsis)
They didn’t find any extra side effects in those who had long term ofatumumab.
The trial team concluded that ofatumumab didn’t improve the length of time before the leukaemia got worse compared with standard treatment. When given long term, it did seem to lengthen the time it takes for the CLL to recur compared to people who didn’t have more treatment. However, ofatumumab did not change the overall survival.
So, the researchers suggest it might be worth looking at ofatumumab as a long term treatment (maintenance treatment) option for people who have had a lot of treatment for CLL in the past.
We have based this summary on information from the research team. The information they sent us has been reviewed by independent specialists (
How to join a clinical trial
Dr Anna Schuh
NIHR Clinical Research Network: Cancer