The study also evaluated in vivo effects of ibrutinib using blood and tissue samples collected before and during treatment. Ibrutinib demonstrated rapid and sustained disease control in blood, lymph nodes, spleen and bone marrow. After 6 months, 95 percent of patients experienced a reduction in lymph node size and all showed reduction in spleen enlargement, with a median reduction of 55 percent. In 26 patients, for whom a bone marrow biopsy was done, tumor infiltration decreased by 82 percent.
The Progression Free Survival probability for these patients at 12 months was estimated to be 94 percent. Most adverse events were mild and manageable and included diarrhea, fatigue and rash, severe events occurred in less than 13 percent of patients.
"We are very pleased with the continued research that is being demonstrated at AACR across 9 different presentations. These advances show the potential breadth of the ibrutinib program and provide further opportunities for us to pursue. We are grateful for the continued support of our collaborators, investigators, patients and shareholders," said Bob Duggan , CEO and chairman of the board.
Ibrutinib has been designated as a FDA Breakthrough Therapy in CLL patients with deletion 17p, based on data from completed Phase I/II clinical studies, where ibrutinib as a monotherapy was used to treat patients with this disease. Ibrutinib has the potential to improve the outcome in this serious and life-threatening disease, and may provide a substantial improvement over existing therapies for this indication.
About Chronic Lymphocytic Leukemia
CLL is the most common type of leukemia, a cancer of the whi
|SOURCE Pharmacyclics, Inc.|
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