Patients with chemotherapy-refractory mantle cell lymphoma experience high response rates and identical progression-free survivals compared with patients with relapsed disease following treatment with single agent bortezomib: results of a multicentre Phase 2 clinical trial.
The recent approval of bortezomib for the treatment of mantle cell lymphoma (MCL) by the US Food and Drug Administration is based on the results of the multicentre PINNACLE study with supportive data from a number of single and multicentre Phase 2 studies. This multicentre Phase 2 study enrolled 40 patients with heavily pretreated MCL. The overall response rate (ORR) was 47%, including 5 complete remissions and 14 partial remissions. Overall, these remissions are relatively durable. The ORR in relapsed and refractory patients was 50% and 43% respectively (P = 0.74), while both populations of patients exhibited essentially similar progression-free survival (PFS; 5.6 months vs. 3.9 months, P = 0.81). Responding patients experienced a PFS from bortezomib that was similar to their line of prior therapy (7.8 months vs. 8.4 months, respectively). The data showed similar responses in relapsed and refractory patients as well as remission durations similar to prior therapy, suggesting that there may be little cross-resistance with other conventional cytotoxic agents. Importantly, these data suggest that MCL patients with refractory or poorly responsive disease may still derive meaningful clinical benefit from treatment with bortezomib.
O'Connor
Owen A
OA
Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY 10032, USA. oo2130@columbia.edu
Moskowitz
Craig
C
Portlock
Carol
C
Hamlin
Paul
P
Straus
David
D
Dumitrescu
Otilia
O
Sarasohn
Debra
D
Gonen
Mithat
M
Butos
John
J
Neylon
Ellen
E
Hamelers
Rachel
R
Mac-Gregor Cortelli
Barbara
B
Blumel
Susan
S
Zelenetz
Andrew D
AD
Gordon
Leo
L
Wright
John J
JJ
Vose
Julie
J
Cooper
Brenda
B
Winter
Jane
J
D000970:Antineoplastic Agents / Q000008:administration & dosage* / Q000627:therapeutic use; D001897:Boronic Acids / Q000627:therapeutic use*; D000069286:Bortezomib; D018572:Disease-Free Survival; D004334:Drug Administration Schedule; D018432:Drug Resistance, Multiple; D005260:Female; D006801:Humans; D020522:Lymphoma, Mantle-Cell / Q000188:drug therapy*; D008297:Male; D009364:Neoplasm Recurrence, Local / Q000188:drug therapy*; D011480:Protease Inhibitors / Q000008:administration & dosage* / Q000627:therapeutic use; D011719:Pyrazines / Q000627:therapeutic use*; D012074:Remission Induction
D000970:Antineoplastic Agents; D001897:Boronic Acids; D011480:Protease Inhibitors; D011719:Pyrazines; D000069286:Bortezomib