Chronic Lymphocytic Leukemia Clinical Trial
Official title:
Phase II Trial of Ofatumumab and Fresh Frozen Plasma in Patients With Relapsed or Refractory Chronic Lymphocytic Leukemia
It has been shown that many patients with lymphoma or chronic lymphocytic leukemia (CLL)have low levels of complement. Several drugs have been approved by the Food and Drug Administration (FDA) for use in this cancer. However, these drugs are often used as combination therapies which means two or more drugs are part of the treatment. Many people, especially elderly patients, cannot put up with the use of multiple drugs because of the side effects. The main purpose of this study is to see if patients respond to therapy with human plasma (known as fresh frozen plasma or FFP) and ofatumumab. Another purpose of the study is to find out if this therapy will increase chances of getting rid of leukemia. This study will also look at the levels of complement in your blood. The levels of complement may allow better understanding of whether increasing the levels of complement by giving FFP may help control leukemia.
The vast majority of patients with CLL are elderly and often they cannot tolerate standard multi-agent chemotherapeutic or biochemotherapeutic approaches. Based on this, less toxic and more effective treatment options are needed. Ofatumumab has proven to be effective in patients with relapsed and/or refractory CLL. Previous studies have shown that ofatumumab is more effective than rituximab at activating complement and utilizing complement-dependent cytotoxicity (CDC). This study will investigate treating relapsed/refractory CLL patients with FFP in combination with ofatumumab. The hypothesis is that patients with CLL have low complement levels and when they get treated with humanized antibodies like rituximab or ofatumumab these levels drop even further. Both these antibodies utilize complement to exert their cytotoxic effect, thus we hypothesize that by replacing complement levels with FFP we can enhance the efficacy of ofatumumab. ;
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