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This ASCO 2016 oral abstract presentation took place on Sunday June 5, 9:45am–12:45pm, during the ‘Hematologic Malignancies-Lymphoma and Chronic Lymphocytic Leukemia’ session. This session was chaired by Pr Gilles Salles, Head of the Hematology Department in South Lyon hospitals, Lyon, France.
The presentation (abstract #7507) was given by Dr Andrew M Evens, Director of the Tufts Cancer Center, Chief of the Division of Hematology/Oncology, Director of the Lymphoma Program and Professor at Tufts University School of Medicine, Boston, MA, USA.
High Risk (HR) Follicular Lymphoma (FL) is an area on great unmet clinical need. The E2408 phase IIa, open-label, multicenter study, conducted by the ECOG-ACRIN Cancer Research Group, began in May 2013 and the primary outcome measure was Overall Response Rate (ORR). It aimed to assess if bortezomib (V) can improve the CR rate achieved by standard bendamustine-rituximab (BR) induction in untreated HR stage I/II or IIIa FL. Moreover, it was investigated if the addition of lenalidomide (len) to maintenance rituximab (MR) improves rates of remission.
HR was defined as high tumor burden by GELF and/or FLIPI 3–5. Patients were randomized to one of three different treatment arms in a 1:2:2 ratio:
A) BR x 6 followed by MR x 2 years (yrs)
B) BVR x 6 (V 1.3 mg/m2 IV/SQ days 1, 4, 8, 11) then MR x 2 yrs
C) BR x 6 then MR x 2 yrs + len 20 mg/day x 1 yr
The data presented in this abstract reports on the first primary objective of CR rate with induction therapy (Tx) with arms A + C combined for induction comparison (90% power at 1-sided α of 0.15).
|
BR |
BVR |
||
FLIPI |
N |
CR % |
N |
CR % |
0–2 |
40 |
65% |
77 |
72% |
3–5 |
28 |
53% |
35 |
76% |
In conclusion, this initial report demonstrated that adding bortezomib to front-line induction with BR is feasible in high tumor burden FL patients. The CR rate for BVR was significantly superior versus BR alone. Overall, BVR was also well tolerated (neurotoxicity was less common when bortezomib was administered subcutaneously).
References
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