Retrospective Analysis of the Experience with Rituximab and Methylprednisone In Elderly Patients with CLL

Blood ◽  
2010 ◽  
Vol 116 (21) ◽  
pp. 4636-4636
Author(s):  
Xavier Badoux ◽  
Ali M Al-Ameri ◽  
Susan O'Brien ◽  
William G. Wierda ◽  
Jan A. Burger ◽  
...  
Keyword(s):  
Chronic Lymphocytic Leukemia ◽  
Partial Response ◽  
Elderly Patients ◽  
Research Funding ◽  
Single Agent ◽  
Lymphocytic Leukemia ◽  
Chromosome 17 ◽  
High Dose ◽  
Β2 Microglobulin ◽  
Grade 3

Abstract Abstract 4636 Background: Single agent rituximab has limited activity in chronic lymphocytic at standard doses; however, the addition of rituximab to purine analogues, monoclonal antibodies or steroids has been shown to improve responses and response duration in patients with untreated and relapsed chronic lymphocytic leukemia (CLL). The combination of rituximab and high dose methylprednisone has shown activity in patients with untreated and fludarabine-refractory CLL (Castro 2008, Castro 2009); however, there is limited reported experience with this regimen in elderly patients. These data prompted us to review our center's experience with rituximab in combination with high dose methylprednisone in elderly patients with CLL. Patients and Methods: We retrospectively identified 24 patients 65 years or older with CLL who received rituximab and methylprednisone between July 2002 and April 2010 at MD Anderson Cancer Center. Six patients received this treatment as initial therapy and 18 patients as salvage treatment. Rituximab 375–750 mg/m2 and methylprednisone 500–2000 mg were administered i.v. weekly for 4 weeks. Three patients received further maintenance treatment with rituximab 375–750 mg/m2 and methylprednisone 500 mg/m2 every month or every 3 months until failure of response. Responses were assessed according to 2008 NCI-WG criteria. Estimated progression free survival and OS were analyzed from time of treatment to progression or death using Kaplan-Meier survival curves. Results: The median age was 71 (65 – 87) years and 17 of 24 (71%) had Rai stage III or IV disease. Two patients had concomitant autoimmune hemolytic anemia (AIHA), one patient had immune thrombocytopenic purpura and AIHA was the indication for therapy in one patient. Median β2-microglobulin was 7.7 (2.3 – 21) mg/l and 5 patients had chromosome 17 abnormalities. Previously treated patients had received a median of 3 (1 – 7) prior treatments and 6 (32%) pts were refractory to fludarabine. Responses were observed in 4 of 6 untreated patients (ORR 67%) and included 3 clinical complete responses unconfirmed by bone marrow biopsy (CRu, 50%) and 1 partial response. The estimated median PFS and OS in this group were 13 and 55 months, respectively. Among patients who received rituximab and methylprednisone as salvage therapy, 7 patients achieved a partial response (ORR 39%), 10 (50%) patients failed treatment, 1 patient (6%) received another therapy after 1 cycle for lack of response and 1 patient (6%) was lost to follow-up. In the salvage group, estimated median PFS and OS were 4 and 18 months, respectively. Four deaths occurred 3, 5, 11 and 12 months after rituximab and methylprednisone without further therapy; 3 patients had progressive CLL and the cause of death was unknown in 1 patient. Grade 3 or 4 neutropenia, anemia and thrombocytopenia occurred in 6 (33%), 3 (14%) and 1 (5%) of evaluable patients. Four patients (17%) experienced grade 3 or 4 infections (3 pneumonia and 1 colonic abscess), 5 patients experienced minor infections and 3 patients experienced viral reactivations (1 CMV, 1 HSV, 2 VZV). There were four grade 3 or 4 non-hematological adverse events including grade 4 gastrointestinal and pulmonary hemorrhage (1), colitis (1), steroid myopathy (1) and peripheral edema (1). All grade 3 or 4 complication occurred in salvage patients. Conclusions: Based on our experience, rituximab and methylprednisone therapy can be safely administered to older patients with CLL. As previously reported by Castro et al, higher response rates were seen in untreated patients, whereas responses were less frequent and shorter lasting in patients with relapsed disease, although this group had high risk disease based on β2-microglobulin levels. Additional studies are required to explore the benefit of this regimen in elderly patients with CLL. Disclosures: Off Label Use: Ofatumumab and lenalidomide in patients with relapsed chronic lymphocytic leukemia. O'Brien:Celgene: Consultancy; Genentech BioOncology: Consultancy. Wierda:Celgene: Consultancy, Membership on an entity's Board of Directors or advisory committees; Genentech BioOncology: Advisory Board, Consultancy, Speakers Bureau. Estrov:Celgene: Consultancy. Keating:Celgene: Consultancy; Genentech: Consultancy. Ferrajoli:Celgene: Research Funding; Genentech: Research Funding.

A Phase Ib/II Study of Combined Obinutuzumab (Gazyva) and High-Dose Methylprednisolone (HDMP) As Treatment for Patients with Chronic Lymphocytic Leukemia (CLL)

Blood ◽  
2016 ◽  
Vol 128 (22) ◽  
pp. 2051-2051 ◽  
Author(s):  
Januario E. Castro ◽  
Michael Y. Choi ◽  
Carlos I. Amaya-Chanaga ◽  
Natalie Nguyen ◽  
Colin MacCarthy ◽  
...  
Keyword(s):  
Chronic Lymphocytic Leukemia ◽  
Research Funding ◽  
Lymphocytic Leukemia ◽  
Phase Iii ◽  
High Dose ◽  
Free Survival ◽  
Phase Ib ◽  
High Dose Methylprednisolone ◽  
Grade 3

Abstract High-dose methylprednisolone (HDMP) and rituximab (R) is an effective non-myelosuppressive treatment regimen for patients (pts) with chronic lymphocytic leukemia (CLL). Also, this combination has shown activity even in pts who have adverse leukemia-cytogenetics, such as del17p. Phase III studies have demonstrated that CLL pts treated with chlorambucil and obinutuzumab-Gazyva (G), another anti-CD20 mAb, had a superior outcome than comparable pts treated with R-chlorambucil. We hypothesized that G-HDMP is well-tolerated and effective in the treatment of pts with CLL. Accordingly, we initiated an open-label phase Ib/II clinical study. A total of 40 pts were enrolled in two cohorts of 20 pts each (previously untreated (PU) and relapsed/refractory (RR) CLL) and treated with HDMP 1 g/m2on Day 1-3 of cycles 1-4 (28 days/cycle) and G administered based on FDA dosing recommendations for 6 cycles. The pts had a median age of 67 years + 9.1 in the RR cohort and 63 years + 8.3 in the PU cohort. The median baseline absolute lymphocyte count was 30.7 + 7.3 x1,000/mm3 for pts in the RR cohort and 47.6 + 19.7 x1,000/mm3for pts in the PU cohort. Pts showed the following cytogenetic abnormalities: del(17p) in 30% RR vs. 0% PU, del(13q) in 60% RR vs. 70% PU, del(11q) in 20% RR vs. 35% PU, and trisomy 12 in 15% RR vs. 20% PU. Most AEs were grade 1-2 (RR=87%; PU=93%) without development of dose-limiting toxicities. Only two pts needed therapy discontinuation. One pt due to pulmonary embolism and the second pt due to asymptomatic gastrointestinal bleeding that required blood transfusion and resolved spontaneously. Grade 1-2 G-infusion-related reactions (IRR) were observed in 40% and 80% of pts in the RR and PU cohorts, respectively. Grade 3-4 IRR were observed in 10% of pts in the PU cohort only. We observed cytopenias (neutropenia grade 3-4: RR=55%, PU=40%; thrombocytopenia grade 3-4: RR=35%, PU=20%; and anemia grade 3-4: RR=0%, PU=0%). There were no cases of febrile neutropenia. Two pts (10%) in the RR cohort and one pt (5%) in the PU cohort developed infection grade 1-2 that was treated with oral antibiotics but did not require study treatment discontinuation. The most frequent non-hematological adverse events (AEs) were transaminitis, hyperglycemia, and electrolyte alterations (grade 1-2). There were no treatment related deaths in either cohort. The response assessment was performed in all 40 pts by iwCLL criteria. The ORR was 100% in the PU cohort and 95% in the RR cohort. 70% of the pts in the PU cohort and 85% of the pts in the RR cohort achieved a PR. CR was observed in 30% and 10% of the pts in the PU and RR cohorts, respectively. One pt (5%) in the RR cohort and four pts (20%) in the PU cohort achieved MRDneg status (<0.01% CLL in the bone marrow by multiparameter flow cytometry). Only one pt in the RR cohort achieved SD. At a median follow-up of 12.2 months, the RR cohort had a median Progression Free Survival (PFS) of 13.6 months and median Treatment Free Survival (TFS) of 14.7 months; the median Overall Survival (OS) has not been reached. In the PU cohort, the median PFS, TFS and OS have not been reached. One pt from the RR cohort and one pt from the PU cohort died during the follow-up period due to disease progression. G-HDMP was well tolerated and all 40 pts showed hematological and clinical responses during the study treatment without development of unexpected AEs. In both cohorts, most of IRR were grade 1-2 and severe IRR (grade 3-4) were much less compared with previously published data (G-chlorambucil / CLL-11 study). Compared to pts in the CLL-11 study, cytopenias appeared to be more frequent, however, the rate of infection and need for IV antibiotics or hospitalizations was lower. Of note, the eligibility criteria allowed pts with severe cytopenias and transfusion requirement to participate in our study. Response in PU pts were higher in terms of ORR, CR and CR-MRDnegativecompared with the data from the CLL-11 study and suggests a possible synergistic activity between G and HDMP. Overall, G-HDMP was well tolerated in the PU and RR CLL pts with a lower rate of IRR making this regimen more manageable in the outpatient setting. Responses were higher than previously reported in PU pts. Responses in RR pts appear to be comparable to our previous studies using R-HDMP. Our data supports G-HDMP as an alternative combination regimen for the treatment of CLL pts. Disclosures Kipps: Celgene: Consultancy, Honoraria, Research Funding; Pharmacyclics, LLC, an AbbVie Company: Consultancy, Honoraria; Gilead: Consultancy, Honoraria, Speakers Bureau; AbbVie: Consultancy, Honoraria, Research Funding; Roche: Consultancy, Honoraria.

Five-Year Experience with Single-Agent Ibrutinib in Patients with Previously Untreated and Relapsed/Refractory Chronic Lymphocytic Leukemia/Small Lymphocytic Leukemia

Blood ◽  
2016 ◽  
Vol 128 (22) ◽  
pp. 233-233 ◽  
Author(s):  
Susan M. O'Brien ◽  
Richard R. Furman ◽  
Steven E. Coutre ◽  
Ian W. Flinn ◽  
Jan Burger ◽  
...  
Keyword(s):  
Chronic Lymphocytic Leukemia ◽  
Board Of Directors ◽  
Research Funding ◽  
Single Agent ◽  
Lymphocytic Leukemia ◽  
Advisory Committees ◽  
Equity Ownership ◽  
Grade 3 ◽  
Over Time

Abstract Background: Ibrutinib (ibr), a first-in-class, once-daily Bruton's tyrosine kinase inhibitor, is approved by the US FDA for treatment of patients (pts) with chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) including pts with del17p. The phase 1b/2 PCYC-1102 trial showed single-agent efficacy and tolerability in treatment-naïve (TN; O'Brien, Lancet Oncol 2014) and relapsed/refractory (R/R) CLL/SLL (Byrd, N Engl J Med 2013). We report efficacy and safety results of the longest follow-up to date for ibr-treated pts. Methods: Pts received 420 or 840 mg ibr QD until disease progression (PD) or unacceptable toxicity. Overall response rate (ORR) including partial response (PR) with lymphocytosis (PR-L) was assessed using updated iwCLL criteria. Responses were assessed by risk groups: unmutated IGVH, complex karyotype (CK; ≥3 unrelated chromosomal abnormalities by stimulated cytogenetics assessed by a reference lab), and in hierarchical order for del17p, then del11q. In the long-term extension study PCYC-1103, grade ≥3 adverse events (AEs), serious AEs, and AEs requiring dose reduction or discontinuation were collected. Results: Median age of the 132 pts with CLL/SLL (31 TN, 101 R/R) was 68 y (range, 37-84) with 43% ≥70 y. Baseline CK was observed in 41/112 (37%) of pts. Among R/R pts, 34 (34%) had del17p, 35 (35%) del11q, and 79 (78%) unmutated IGVH. R/R pts had a median of 4 prior therapies (range, 1-12). Median time on study was 46 m (range, 0-67) for all-treated pts, 60 m (range, 0-67.4) for TN pts, and 39 m (range, 0-67) for R/R pts. The ORR (per investigator) was 86% (complete response [CR], 14%) for all-treated pts (TN: 84% [CR, 29%], R/R: 86% [CR, 10%]). Median progression-free survival (PFS) was not reached (NR) for TN and 52 m for R/R pts with 60 m estimated PFS rates of 92% and 43%, respectively (Figure 1). In R/R pts, median PFS was 55 m (95% confidence intervals [CI], 31-not estimable [NE]) for pts with del11q, 26 m (95% CI,18-37) for pts with del17p, and NR (95% CI, 40-NE) for pts without del17p, del11q, trisomy 12, or del13q. Median PFS was 33 m (95% CI, 22-NE) and NR for pts with and without CK, and 43 m (95% CI, 32-NE) and 63 m (95% CI, 7-NE) for pts with unmutated and mutated IGVH, respectively(Figure 2). Among R/R pts, median PFS was 63 m (95% CI, 37-NE) for pts with 1-2 prior regimens (n=27, 3 pts with 1 prior therapy) and 59 m (95% CI, 22-NE) and 39 m (95% CI, 26-NE) for pts with 3 and ≥4 prior regimens, respectively. Median duration of response was NR for TN pts and 45 m for R/R pts. Pts estimated to be alive at 60 m were: TN, 92%; all R/R, 57%; R/R del17p, 32%; R/R del 11q, 61%; R/R unmutated IGVH, 55%. Among all treated pts, onset of grade ≥3 treatment-emergent AEs was highest in the first year and decreased during subsequent years. With about 5 years of follow-up, the most frequent grade ≥3 AEs were hypertension (26%), pneumonia (22%), neutropenia (17%), and atrial fibrillation (9%). Study treatment was discontinued due to AEs in 27 pts (20%) and disease progression in 34 pts (26%). Of all treated pts, 38% remain on ibr treatment on study including 65% of TN pts and 30% of R/R pts. Conclusions: Single-agent ibrutinib continues to show durable responses in pts with TN or R/R CLL/SLL including those with del17p, del11q, or unmutated IGVH. With extended treatment, CRs were observed in 29% of TN and 10% of R/R pts, having evolved over time. Ibrutinib provided better PFS outcomes if administered earlier in therapy than in the third-line or beyond. Those without CK experienced more favorable PFS and OS than those with CK. Ibrutinib was well tolerated with the onset of AEs decreasing over time, allowing for extended dosing for 65% of TN and 30% of R/R pts who continue treatment. Disclosures O'Brien: Janssen: Consultancy, Honoraria; Pharmacyclics, LLC, an AbbVie Company: Consultancy, Honoraria, Research Funding. Furman:Pharmacyclics, LLC, an AbbVie Company: Consultancy, Honoraria, Speakers Bureau. Coutre:Janssen: Consultancy, Research Funding; Pharmacyclics, LLC, an AbbVie Company: Consultancy, Research Funding; AbbVie: Research Funding. Flinn:Janssen: Research Funding; Pharmacyclics LLC, an AbbVie Company: Research Funding; Gilead Sciences: Research Funding; ARIAD: Research Funding; RainTree Oncology Services: Equity Ownership. Burger:Pharmacyclics, LLC, an AbbVie Company: Research Funding; Gilead: Research Funding; Portola: Consultancy; Janssen: Consultancy, Other: Travel, Accommodations, Expenses; Roche: Other: Travel, Accommodations, Expenses. Sharman:Gilead: Research Funding; TG Therapeutics: Research Funding; Acerta: Research Funding; Seattle Genetics: Research Funding; Pharmacyclics: Research Funding; Celgene: Research Funding. Wierda:Abbvie: Research Funding; Genentech: Research Funding; Novartis: Research Funding; Acerta: Research Funding; Gilead: Research Funding. Jones:Janssen: Membership on an entity's Board of Directors or advisory committees, Research Funding; AbbVie: Membership on an entity's Board of Directors or advisory committees, Research Funding; Pharmacyclics, LLC, an AbbVie Company: Membership on an entity's Board of Directors or advisory committees, Research Funding. Luan:AbbVie: Equity Ownership; Pharmacyclics, LLC, an AbbVie Company: Employment, Other: Travel, Accommodations, Expenses. James:AbbVie: Equity Ownership; Pharmacyclics, LLC, an AbbVie Company: Employment. Chu:Pharmacyclics, LLC, an AbbVie Company: Employment; AbbVie: Equity Ownership.

The Combination of Lenalidomide and Rituximab Induces Complete and Partial Responses In Patients with Relapsed and Refractory Chronic Lymphocytic Leukemia.

Blood ◽  
2010 ◽  
Vol 116 (21) ◽  
pp. 1395-1395 ◽  
Author(s):  
Alessandra Ferrajoli ◽  
Xavier Badoux ◽  
Susan O'Brien ◽  
William G. Wierda ◽  
Stefan Faderl ◽  
...  
Keyword(s):  
Chronic Lymphocytic Leukemia ◽  
Research Funding ◽  
Single Agent ◽  
Tumor Lysis Syndrome ◽  
Cell Activity ◽  
Lymphocytic Leukemia ◽  
Cytotoxic T Cell ◽  
Tumor Lysis ◽  
Significant Difference ◽  
Grade 3

Abstract Abstract 1395 Lenalidomide is an immunomodulatory drug with single-agent activity in untreated and relapsed patients (pts) with chronic lymphocytic leukemia (CLL). Lenalidomide may potentiate the activity of rituximab through enhancement of NK and cytotoxic T-cell activity and antibody-dependent cytotoxicity. As lenalidomide is active as single-agent in relapsed/refractory CLL, we designed a trial to evaluate the combination of lenalidomide and rituximab in pts with previously treated CLL. Between 09/2008 and 10/2009, 59 pts with relapsed or treatment-refractory CLL were enrolled in this Phase II trial. Pts were eligible if they had relapsed disease requiring treatment and had received prior fludarabine-based therapy. Pts were required to have adequate performance status (WHO <3) and adequate renal and liver function (serum Cr or bilirubin <2mg/dl). Pts with an unrelated malignancy or with HIV, hepatitis B or C infection were excluded. Rituximab 375 mg/m2 was given intravenously weekly × 4 from Day 1 in Cycle 1 then every 4 weeks during cycles 3 – 12. Oral lenalidomide 10 mg/day was started on Day 9 of cycle 1 on a continuous dosing schedule. Cycles were 28 days with intention to continue therapy for 12 cycles or longer if the patient experienced a clinical response. Dose reductions were made following grade 3 or 4 lenalidomide-related toxicity. Allopurinol 300mg daily was prescribed during the first 2 weeks as tumor lysis prophylaxis. Response evaluation was performed with after cycles 3, 6 and every 6 cycles thereafter using 2008 IWCLL response assessment guidelines. Toxicity was graded according to CTC-v3.0 criteria. All 59 pts are evaluable for response and clinical outcome. Patient pre-treatment characteristics are shown in Table 1. All pts had prior rituximab therapy and 52 (88%) pts had prior chemoimmunotherapy with fludarabine, cyclophosphamide and rituximab (FCR). The overall response rate was 64% with 5 complete responses (CR, 8%), 3 CR with incomplete hematological recovery (CRi, 5%), 7 nodular partial remissions (nPR, 12%) and 23 PR (39%). Most response (32/38, 84%) occurred by 3 cycles of therapy, but the majority of CR/CRi (7 of 8, 88%) occurred after 6 cycles of therapy. At a median follow-up of 14 months, the estimated treatment failure rate was 42% and estimated overall survival (OS) was 90%. There was no significant difference in responses or TTF for pts with deletion 17p when compared to other FISH subgroups. Two deaths occurred while on study therapy, one due to ischemic stroke and one to infectious exacerbation of chronic obstructive pulmonary disease. Six deaths occurred after progression of disease during subsequent therapies. Grade 3/4 neutropenia, thrombocytopenia and anemia occurred in 40 (68%), 13 (22%) and 6 (10%) pts, respectively. Grade 3/4 infections occurred in 18 pts (31%), mostly lower respiratory tract. Seventy-three % of pts required a dose reduction of lenalidomide with a median tolerated daily dose of 5mg (2.5mg – 10mg). One patient experienced a grade 3 tumor lysis syndrome and 22 pts had grade 1–2 tumor flare reactions. In conclusion, combination therapy with lenalidomide and rituximab induces both complete and partial responses as salvage therapy in CLL. The addition of rituximab to lenalidomide appears to improve responses relative to single agent lenalidomide (Ferrajoli 2008, Chanan-Khan 2006) despite all pts having received prior rituximab-based therapies. This treatment was well tolerated with the most common toxicity being myelosuppression. Disclosures: Ferrajoli: Celgene: Research Funding; Genentech: Research Funding. Off Label Use: The use of lenalidomide in the treatment of chronic lymphocytic leukemia. O'Brien:Celgene: Consultancy; Genentech BioOncology: Consultancy. Wierda:Celgene: Consultancy, Membership on an entity's Board of Directors or advisory committees; Genentech BioOncology: Advisory Board, Consultancy, Speakers Bureau. Estrov:Celgene: Consultancy. Keating:Celgene: Consultancy; Genentech: Consultancy.

Final Analysis From the International Trial of Single-Agent Ofatumumab In Patients with Fludarabine-Refractory Chronic Lymphocytic Leukemia

Blood ◽  
2010 ◽  
Vol 116 (21) ◽  
pp. 921-921 ◽  
Author(s):  
William G. Wierda ◽  
Thomas J. Kipps ◽  
Jiri Mayer ◽  
Tadeusz Robak ◽  
Martin JS Dyer ◽  
...  
Keyword(s):  
Chronic Lymphocytic Leukemia ◽  
Primary Endpoint ◽  
Interim Analysis ◽  
Research Funding ◽  
Single Agent ◽  
Early Death ◽  
Progression Free Survival ◽  
Final Analysis ◽  
Lymphocytic Leukemia ◽  
Grade 3

Abstract Abstract 921 Background: Patients with chronic lymphocytic leukemia (CLL) refractory to fludarabine and alemtuzumab (FA-ref) or refractory to fludarabine with bulky (>5 cm) lymphadenopathy (BF-ref) have poor prognosis with salvage regimens (Tam et al. Leuk Lymphoma 2007). Ofatumumab, a human CD20 monoclonal antibody, was recently approved by the US FDA and EMEA for treatment of CLL refractory to fludarabine and alemtuzumab based on the interim analysis of the pivotal international clinical trial, which included data from 138 patients with FA-ref and BF-ref CLL. At the interim analysis, the overall response rate (ORR; primary endpoint) with single-agent ofatumumab was 58% (99% CI: 40, 74) in the FA-ref group and 47% (99% CI: 32, 62) in the BF-ref group (Wierda et al. J Clin Oncol 2010). Here, we report the final result for the primary endpoint in 206 patients with FA-ref or BF-ref CLL enrolled in this study. Methods: Patients with FA-ref or BF-ref CLL received 8 weekly doses of ofatumumab followed by 4 monthly doses (dose 1, 300 mg; doses 2–12, 2000 mg). Premedication included acetaminophen, antihistamine and glucocorticoid. The primary endpoint (ORR, 1996 NCI-WG criteria) was evaluated over the 24-week treatment period by an Independent Endpoint Review Committee (IRC). Secondary endpoints included duration of response, progression-free survival (PFS), overall survival (OS) and safety. Results: Baseline characteristics are summarized in the Table; 89% and 50% of patients completed 8 and 12 ofatumumab doses, respectively. The ORR (95% CI) by IRC evaluation was 51% (40, 61) for the FA-ref group and 44% (35, 64) for the BF-ref group. Two patients in the BF-ref group achieved complete remission (Table). Results for time-to-event analyses are shown in the Table. Infusion-related AEs occurred in 63% of patients, which primarily occurred during doses 1 and 2, and diminished with subsequent doses. Infusion-related reactions were grade 1–2 events in 95% of patients; no fatal reactions were reported. The most common (≥5% of all patients) grade ≥3 adverse events (AEs) that occurred from start of treatment until 30 days after the last infusion were infections (24%), neutropenia (12%) and anemia (5%). The most common grade ≥3 infection was pneumonia (8% of patients). Fatal infections occurred in 8% of patients (13% in FA-ref; 5% in BF-ref groups). Grade 3–4 thrombocytopenia occurred in 8 patients (4%), febrile neutropenia in 4 patients (2%) and autoimmune hemolytic anemia in 2 patients (1%). Early death (within 8 weeks from start of treatment) occurred in 5 patients (5%) in the FA-ref group (infections, n=5) and 4 patients (4%) in the BF-ref group (infections, n=2; myocardial infarction, n=1; pulmonary edema, n=1). Conclusions: These final results from the pivotal trial clearly demonstrate the efficacy and safety of ofatumumab monotherapy in this heavily pretreated patient population with FA-ref and BF-ref CLL. Additional data analyses are ongoing, and efficacy outcomes for patient subgroups will be presented. Disclosures: Wierda: GlaxoSmithKline: Honoraria, Research Funding. Kipps:GlaxoSmithKline: Research Funding. Mayer:GlaxoSmithKline: Consultancy, Research Funding. Robak:GlaxoSmithKline: Consultancy, Honoraria, Research Funding; Genmab: Consultancy, Research Funding; Roche: Consultancy, Honoraria, Research Funding. Furman:GlaxoSmithKline: Consultancy, Speakers Bureau; Genentech: Consultancy, Speakers Bureau; Cephalon, Inc.: Speakers Bureau; Celegene: Consultancy; Calistoga: Consultancy. Stilgenbauer:Amgen: Research Funding; Bayer: Consultancy, Honoraria, Research Funding; Boehringer-Ingelheim: Consultancy, Honoraria, Research Funding; Celgene: Consultancy, Honoraria, Research Funding; Genzyme: Consultancy, Honoraria, Research Funding; GSK: Consultancy, Honoraria, Research Funding; Mundipharma: Consultancy, Honoraria, Research Funding; Roche: Consultancy, Honoraria, Research Funding; Sanofi Aventis: Research Funding. Cartron:GlaxoSmithKline: Honoraria; Roche: Honoraria. Padmanabhan:GlaxoSmithKline: Consultancy, Membership on an entity's Board of Directors or advisory committees, Research Funding. Chan:GlaxoSmithKline: Employment. Gupta:GlaxoSmithKline: Employment. Gorczyca:GlaxoSmithKline: Employment. Davis:GlaxoSmithKline: Employment. Losic:Genmab A/S: Employment, Equity Ownership. Lisby:Genmab A/S: Employment. Österborg:GlaxoSmithKline: Consultancy, Honoraria, Research Funding; Genzyme: Consultancy, Honoraria, Research Funding; Celgene: Consultancy, Honoraria, Research Funding; Merck KGaA: Research Funding.

Long-Term Follow-up of a Phase 2 Study of Single Agent Lenalidomide in Previously Untreated, Symptomatic Chronic Lymphocytic Leukemia (CLL)

Blood ◽  
2012 ◽  
Vol 120 (21) ◽  
pp. 718-718
Author(s):  
Christine Chen ◽  
Harminder Paul ◽  
Trina Wang ◽  
Lisa W Le ◽  
Vishal Kukreti ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Chronic Lymphocytic Leukemia ◽  
Research Funding ◽  
Single Agent ◽  
Lymphocytic Leukemia ◽  
Phase 2 ◽  
Phase 2 Study ◽  
Grade 3

Abstract Abstract 718 Introduction: In a previously reported phase 2 study of single agent lenalidomide in 25 untreated CLL patients (pts), we reported an overall response rate (ORR) of 56% (14 pts), 40% SD (10 pts) and no CR at a median follow-up of 20.7 months (Chen et al. JCO 2010;29:1175). Although an amended protocol with conservative lenalidomide dosing was used to mitigate tumor lysis and severe myelosuppression observed in the first 2 accrued pts, we continued to observe frequent toxicities of grade 3–4 neutropenia (72%) and tumor flare (TF 88%). We now report long-term efficacy and toxicity from this study at a median follow-up of 47 months (mos). Methods: Patients were eligible if previously untreated and symptomatic (cytopenias, symptomatic adenopathy/organomegaly, constitutional symptoms, lymphocyte doubling count <12 mos). The amended starting dose for lenalidomide was 2.5mg daily on days 1–21 of a 28 day cycle, with slow monthly dose escalations (2.5mg cycle 1, 5mg cycle 2, 10mg cycle 3 and if required for response, further 5mg increments to a maximum of 25mg daily were allowed). Results: Longterm toxicities: Hematologic toxicities were common: grade 3–4 neutropenia (76%), thrombocytopenia (28%), anemia (20%). With longer term use, neutropenia tended to recur (12% of all cycles) and 10 pts required GCSF support (5 routinely during each cycle). Most common non-hematologic toxicities (all grades) were TF (88%), fatigue (76%), rash (60%), muscle cramping (40%), diarrhea (40%). All non-hematologic toxicities were mild (grade 1–2), except for 1 pt each with grade 3 rash and diarrhea. Although TF was most common during cycle 1, repeat flare symptoms upon resuming lenalidomide after the 7 day rest period of each cycle were noted in 16% of all 898 cycles administered, and as late as at cycle 28. Infections were mild (most respiratory, skin) with only 2 grade 3 events (disseminated zoster, S.pneumoniae bacteremia). Other malignancies: 2 pts developed transformed large cell lymphoma 7 and 18 mos after study discontinuation, 1 pt developed squamous cell carcinoma of skin at cycle 51, and 1 pt developed recurrence of remote non-small cell lung cancer at cycle 34. Dose modifications/discontinuation: The median highest dose achieved for all 25 pts was 15 mg (range 2.5–25 mgs); 8 pts were able to escalate to the maximal 25mg dose. Ten pts (40%) required dose reductions for grade 3 cytopenias [neutropenia (2), thrombocytopenia (2), both (2)], febrile neutropenia (2), and diarrhea (2). Of all 25 pts, the median duration on therapy was 31.1 mos (range 28 days – 60.6 mos). Twelve pts (52%) currently remain on study, receiving a median of 59 cycles of therapy (range 48–66). Causes of discontinuation for 13 pts included: treatment-related toxicity (8), lack of response/progressive disease (4), and recurrence of remote lung cancer (1). Toxicities leading to discontinuation included: prolonged cytopenias (3), recurrent infections (1), atrial fibrillation (1), disseminated herpes zoster (1), persistent grade 2 diarrhea (1), and grade 3 skin rash (1). Efficacy: With extended median follow-up from 20.7 to 47 mos, the ORR improved from 56% (14 pts) to 72% (18 pts), with 3 pts in PR upgrading to CR, and 1 SD to PR. Although the median time to response was 7.7 mos, responses occurred as quickly as 1.8 mos to as late as 27.0 mos of therapy. For the 3 CR pts, prolonged therapy with an additional 14.9, 28.3 and 40.6 mos beyond the time of first response was required to achieve CR. To date, 7 pts have progressed with 3-year PFS 68.8% (95% CI:52–91%) and OS 85.3% (95% CI:71.1–100%). Correlatives: Cereblon (CRBN), recently identified as a direct protein target of lenalidomide, was evaluated by gene expression profiling and Western blot and found to be uniformly expressed in all 19 evaluable day 1 pt samples regardless of lenalidomide response. Thus, baseline CRBN expression does not appear to be a useful predictive biomarker of response in this population. The mechanism by which CRBN is linked to response is reported by Trudel et al, ASH 2012. Conclusions: Long-term followup of this study demonstrates that when using low doses of single agent lenalidomide in CLL, prolonged therapy is feasible and may be required for the achievement of durable, high quality responses. Maximal daily doses of 25mg can be reached and may also be needed for optimal response, though recurrent myelosuppression remains limiting. Disclosures: Chen: Celgene: Honoraria, Research Funding; GlaxoSmithKline: Research Funding; Lundbeck: Consultancy; Janssen: Consultancy, Research Funding. Off Label Use: Lenalidomide is not approved for use in chronic lymphocytic leukemia. Kukreti:Roche: Honoraria; Celgene: Honoraria; Janssen Ortho: Honoraria. Trudel:Celgene: Honoraria, Research Funding, Speakers Bureau.

scholarly journals Lenalidomide as initial therapy of elderly patients with chronic lymphocytic leukemia

Blood ◽  
2011 ◽  
Vol 118 (13) ◽  
pp. 3489-3498 ◽  
Author(s):  
Xavier C. Badoux ◽  
Michael J. Keating ◽  
Sijin Wen ◽  
Bang-Ning Lee ◽  
Mariela Sivina ◽  
...  
Keyword(s):  
Chronic Lymphocytic Leukemia ◽  
Partial Response ◽  
Elderly Patients ◽  
Progression Free Survival ◽  
Complete Response ◽  
Initial Therapy ◽  
Lymphocytic Leukemia ◽  
Common Grade ◽  
Grade 3

Abstract The best initial therapy for elderly patients with chronic lymphocytic leukemia (CLL) has not yet been defined. We investigated the activity of lenalidomide as initial therapy for elderly patients with CLL. Sixty patients with CLL 65 years of age and older received treatment with lenalidomide orally 5 mg daily for 56 days, then titrated up to 25 mg/d as tolerated. Treatment was continued until disease progression. At a median follow-up of 29 months, 53 patients (88%) are alive and 32 patients (53%) remain on therapy. Estimated 2-year progression-free survival is 60%. The overall response rate to lenalidomide therapy is 65%, including 10% complete response, 5% complete response with residual cytopenia, 7% nodular partial response, and 43% partial response. Neutropenia is the most common grade 3 or 4 treatment-related toxicity observed in 34% of treatment cycles. Major infections or neutropenic fever occurred in 13% of patients. Compared with baseline levels, we noted an increase in serum immunoglobulin levels across all classes, and a reduction in CCL3 and CCL4 plasma levels was noted in responding patients. Lenalidomide therapy was well tolerated and induced durable remissions in this population of elderly, symptomatic patients with CLL. This study was registered at www.clinicaltrials.gov as #NCT00535873.

Combination of Ofatumumab and Lenalidomide In Patients with Relapsed Chronic Lymphocytic Leukemia: Initial Results of a Phase II Trial

Blood ◽  
2010 ◽  
Vol 116 (21) ◽  
pp. 2464-2464 ◽  
Author(s):  
Xavier Badoux ◽  
Susan O'Brien ◽  
William G. Wierda ◽  
Stefan Faderl ◽  
Zeev Estrov ◽  
...  
Keyword(s):  
Chronic Lymphocytic Leukemia ◽  
Phase Ii ◽  
Research Funding ◽  
Performance Status ◽  
Single Agent ◽  
Lymphocytic Leukemia ◽  
Fish Analysis ◽  
Significant Activity ◽  
Superficial Vein Thrombosis ◽  
Grade 3

Abstract Abstract 2464 Frontline chemoimmunotherapies induce high response rates in patients with CLL. Once disease recurs, however, effective treatment options are limited and new therapeutic modalities and combinations are needed. Ofatumumab is a fully humanized anti-CD20 monoclonal antibody which produces an overall response rate (ORR) of 47%–58% in patients with fludarabine-refractory CLL (Wierda W. et al, 2010). Lenalidomide, an immunomodulatory agent, induces an ORR of 32–47% in patients with relapsed/refractory CLL, (Chanan-Khan A.A. et al. 2006; Ferrajoli A. et al. 2008). The rationale for combining ofatumumab and lenalidomide is based on their single agent efficacy, distinct and potentially complimentary mechanisms of action and non-overlapping toxicity profiles. Furthermore, the combination of lenalidomide and rituximab has shown significant activity in patients with relapsed disease (Ferrajoli et al. 2009). We, therefore, designed a phase II study to evaluate efficacy and tolerability of ofatumumab and lenalidomide given in combination in patients with relapsed CLL. Patients with active disease were eligible if they had received prior treatment with purine analog-based therapy, had an ECOG/WHO performance status of 0–2, adequate renal (creatinine clearance > 30ml/min) and hepatic function (total bilirubin < to 2 mg/dl and ALT < 2 × ULN). Patients with any neutrophil count were eligible, whereas patients with platelet counts < 30,000 mm3, positivity for HIV, active hepatitis B or C or recent history of tuberculosis were excluded from participation. In this trial ofatumumab is administered intravenously weekly for four consecutive weeks (300mg week 1, 1,000 mg week 2 and all subsequent doses), then monthly for months 2–6 and once every two months for months 7–24. Lenalidomide is given orally at the dose of 10 mg daily, starting on day 9 and continued daily. Allopurinol at the dose of 300mg daily is given during the first two weeks of treatment as tumor lysis prophylaxis. Treatment duration is 24 months, and responses are assessed after 3, 6, 12, 18 and 24 months of therapy. Thus far 26 of the 40 planned patients have been accrued to this study and we present an analysis of response and toxicity for the first 16 patients that have been on study for at least 3 months. The median age of the patients is 62 yrs (45–82). Eight patients (50%) had Rai stage III-IV disease. The median Beta-2M level was 4.4 mg/dL (2–6.1). The median number of prior treatments was 2 (1–8). Four patients (25%) were refractory to fludarabine and all pts had received prior rituximab. Nine patients (56%) had unmutated IGHV genes, 5 patients (31%) had chromosome 17p deletion and 3 patients (19%) had 11q deletion as detected by FISH analysis. Responses were evaluated according to the 2008 IWCLL criteria: 10 of the 16 evaluable patients achieved a response [2 CR (13%), 8 PR (50%)] for an ORR of 63%. Four patients with stable disease are continuing on treatment. One patient discontinued therapy and did not return for response assessment and another patient progressed. All patients are alive. The most common grade 3–4 treatment related adverse events observed were: neutropenia (8 pts, 50%) and anemia (2 pts, 13%). One patient (6%) developed grade 2 superficial vein thrombosis. Lenalidomide-associated tumor flare reaction was limited to grade 1 in 2 patients (13%) while a grade 3 infusion reaction was observed in 1 patient (6%) during the first ofatumumab administration. Three grade 3 infectious episodes occurred: 2 cases of pneumonia and 1 case of parotiditis. None of the patients received routine antibiotic prophylaxis. The median daily dose of lenalidomide tolerated was 5 mg/day (2.5–10 mg). In conclusion, our initial analysis indicates that the combination of ofatumumab and lenalidomide is therapeutically active in patients with relapsed CLL. This treatment is well tolerated. Neutropenia is the most common toxicity observed. Enrollment is ongoing, and updated results will be provided. Disclosures: Off Label Use: Ofatumumab and lenalidomide in patients with relapsed chronic lymphocytic leukemia. O'Brien: GlaxoSmithKline: Consultancy. Wierda: GlaxoSmithKline: Honoraria, Research Funding; Celgene Corporation: Consultancy, Membership on an entity's Board of Directors or advisory committees. Estrov: Celgene Corporation: Consultancy. Keating: Celgene Corporation: Consultancy, Honoraria; GlaxoSmithKline: Consultancy, Honoraria. Ferrajoli: Celgene Corporation: Research Funding; GlaxoSmithKline: Research Funding.

Ofatumumab Added To Dexamethasone In Patients With Relapsed Or Refractory Chronic Lymphocytic Leukemia. Results From a Phase II Study Of The Czech Leukemia Study Group For Life

Blood ◽  
2013 ◽  
Vol 122 (21) ◽  
pp. 2877-2877 ◽  
Author(s):  
Michael Doubek ◽  
Yvona Brychtova ◽  
Anna Panovska ◽  
Jakub Trizuljak ◽  
Ludmila Sebejova ◽  
...  
Keyword(s):  
Chronic Lymphocytic Leukemia ◽  
Disease Progression ◽  
Phase Ii ◽  
Research Funding ◽  
Phase Ii Study ◽  
Lymphocytic Leukemia ◽  
High Dose ◽  
In Vitro Testing ◽  
Grade 3

Abstract The treatment of relapsed/refractory chronic lymphocytic leukemia (CLL) remains a challenging clinical issue despite remarkable improvements in prognostication and therapy. One emerging treatment option for relapsed/refractory CLL is the use of high-dose corticosteroids. High-dose methylprednisolone or dexamethasone combined with rituximab are active in relapsed/refractory CLL, but serious infections are frequent and progression-free survival (PFS) is short. The purpose of this clinical trial was to determine the efficacy and toxicity of ofatumumab-dexamethason (O-dex) combination in relapsed or refractory CLL population. The trial was an open-label, multi-center, non-randomized, phase II study. The O-dex regimen consisted of intravenous ofatumumab (Cycle 1: 300mg on day 1, 2000mg on days 8, 15, 22; Cycles 2-6: 1000mg on days 1, 8, 15, 22) and oral dexamethasone (40mg on days 1-4 and 15-18; Cycles 1-6). Premedication consisted of glucocorticoid, paracetamol, and antihistamine before each ofatumumab infusion. All patients received allopurinol, omeprazol, co-trimoxazole, and fluconazole for prophylaxis of tumor lysis syndrome and infections. The O-dex regimen was given for a minimum of 3 cycles, until best response, or a maximum of 6 cycles. Between July 2010 and December 2012, 32 patients (pts.) were recruited at 3 centers. Basic patient characteristics at the start of O-dex therapy were as follows: median age 66 years (range, 50-77); 24 males, 8 females; median CIRS score 7 (0-15); median previous treatment lines 3 (1-10); 30 (94%) pts. were pretreated with fludarabine and 12 (38%) with alemtuzumab; Rai III/IV stage was present in 20 (63%) pts.; 6 (19%) pts. had bulky lymphadenopathy; IgVH genes were unmutated in 30 (94%) pts.; del 11q was present in 6 (19%) and p53 defects (del 17p and/or TP53 mutation) in 8 (25%) pts. The median number of O-dex cycles administered was 6 (1-6). Twenty two (69%) pts. completed at least 3 cycles of therapy. The remaining 9 patients were prematurely discontinued due to CTCAE grade 3/4 infections (7 pts.), disease progression (1 pt.), or uncontrollable diabetes mellitus (1 pt.). Overall responses/complete remissions (ORR/CR) were achieved in 22/5 pts. (69/16%). One patient achieved minimal residual disease negativity (measured by 4-color flow cytometry) at the end of therapy. Median PFS was 10 months. In patients with p53 defects, ORR/CR were achieved in 5/2 pts. (63/25%). The Median PFS was 10.5 months for this subgroup. Median overall survival (OS) has not yet been reached. During therapy, CTCAE grade 3/4 toxicity consisted of bacterial infections (25%), ofatumumab infusion-related side-effects (9%), neutropenia (9%), hyperglycemia (6%), and anemia (3%). No reactivation of herpetic viral infection was observed during the course of therapy. Nine patients died during the follow-up as a result of disease progression (6 pts.), infections (2 pts.), or complications after allogeneic stem cell transplantation (1 relapsed pt.). The median CD20 antigen density in CLL cells was 4766 (881-18515) MESF (molecules of equivalent soluble fluorochrome) units at baseline. At the end of therapy, CD20 density had significantly decreased (median 821 MESF; 443-2637); nevertheless, it was high once more at relapse (median 6619 MESF; 628-21359). In vitro testing of malignant pts. cells sensitivity to dexamethasone and ofatumumab did not show synergistic or additive effect of these compounds in majority of patients. Also, in vitro testing did not clearly predict the outcome of O-dex therapy. Conclusions The O-dex regimen shows relatively high ORR and CR, with promising findings for PFS and OS (including pts. harboring p53 defects), as compared to published data on rituximab plus dexamethasone regimen or ofatumumab in monotherapy. The infectious toxicity in 1/4 of pts. represents the most frequent side effect for this regimen. The study was registered at www.clinicaltrials.gov (NCT01310101). Disclosures: Doubek: GlaxoSmithKline: Research Funding. Mayer:Roche: Consultancy, Research Funding; Glaxo: Consultancy, Research Funding.

scholarly journals Long-Term Follow up of Front-Line Therapy with Ofatumumab, High Dose Methylprednisolone and Lenalidomide (HiLO trial) for Treatment-Naïve Chronic Lymphocytic Leukemia

Blood ◽  
2018 ◽  
Vol 132 (Supplement 1) ◽  
pp. 3150-3150
Author(s):  
Ariel Felipe Grajales-Cruz ◽  
Julio C. Chavez ◽  
Elyce P. Turba ◽  
Lisa Nodzon ◽  
Francisco Perez Leal ◽  
...  
Keyword(s):  
Chronic Lymphocytic Leukemia ◽  
Research Funding ◽  
Treatment Phase ◽  
Lymphocytic Leukemia ◽  
High Dose ◽  
Front Line ◽  
High Dose Methylprednisolone ◽  
Treatment Naïve ◽  
Grade 3

Abstract Background: New targeted therapies continue to show improved efficacy in various stages of chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL), sparing patients from chemoimmunotherapy. However, cure remains elusive. Here, we present a front-line alternative based on a combination of high-dose methylprednisolone (HDMP) and ofatumumab, followed by consolidative therapy with lenalidomide plus ofatumumab. Methods: This is a phase II, single-center study in patients with treatment-naive (TN) CLL/SLL. During the first treatment phase (cycles 1-3) patients received HDMP 1000 mg/m2 IV and ofatumumab 2000 mg (300 mg given week 1 then 2000 mg for a total of 12 doses) IV infusions weekly x 4 doses in cycle 1 of a 28 day cycle, then every 2 weeks for cycles 2 and 3. During the second treatment phase (cycles 4-12), patients received renally adjusted lenalidomide 5-10 mg daily and ofatumumab 2000mg IV once every 8 weeks. Growth factor support was permitted at the discretion of treating physician. Prophylactic medications included allopurinol for tumor lysis syndrome (TLS) 3 days before C1D1 through C1; and trimethoprim/sulfamethoxazole and fluconazole through cycle 4, and acyclovir through C12. Patients received aspirin 81 mg/day as thrombosis prophylaxis while on lenalidomide. Patients were assessed for response by iwCLL 2008 criteria (including imaging assessment) after completion of cycles 3 and 12. The study allowed continuation of lenalidomide if patients achieved complete (CR), partial (PR) response or stable disease (SD). Primary endpoints were efficacy, adverse events (AEs) profile, and time-to-treatment failure (TTF). Results: Between January 2012 and September 2015, the study enrolled a total of 45 patients. Median follow-up was 50.4 (5.6-72.8) months. The median age was 62.6 (48.2-86.1) years. Chromosomal analysis by FISH demonstrated Del17p in 8 (17.8%), Del11q (+/- others, except Del17p) in 10 (22.2%), Trisomy 12 (+/- others, except Del17p and Del11q) in 8 (17.8%), Del13q in 10 (22.2%), no mutations in 9 (20%) patients. The IGHV status was unmutated in 34 (75.6%) cases. Indications to start treatment were: symptomatic lymphadenopathy, symptomatic splenomegaly, anemia, and thrombocytopenia in 5 (11.1%), 10 (22.2%), 12 (26.7%), and 18 (40%), respectively. The median duration of treatment was 35.6 (2.7-66.9) months. Reasons for treatment discontinuation were: progressive disease (PD) in 9 (20%), AEs in 15 (33.3%), transplantation in 3 (6.7%), consent withdrawal in 1 (2.2%), and secondary malignancies in 2 (4.4%) cases. The overall response rates (PR+CR) at 3, 12, 24, 36, and 48 months were 75.6%, 77.8%, 66.7%, 44.4%, and 37.8%, respectively. The CR rates at 3, 12, 24, 36, and 48 months were 2.2%, 11.1%, 20%, 17.8%, and 13.3% respectively. Fifteen patients remain in PR/CR and on treatment at the time of this analysis. The intention-to-treat median TTF was 45.2 (2.9-69.7) months, and was not different among high risk groups such as Del17p, Del11q and/or unmutated IgHV. In patients who discontinued for reasons other than PD the median duration of response without treatment was 30.7 (9.8-69.7) months. Three (6.7%) patients underwent allogeneic hematopoietic cell transplantation after a median of 3 (3 - 4) treatment cycles. Treatment was well tolerated with grade 3/4 infusion reaction in 1 (2.2%) patient. Grade 3/4 treatment-related hematological AEs were neutropenia, thrombocytopenia, and anemia in 33 (73.3%), 5 (11.1%), and 1 (2.2%), respectively. Grade 3/4 infections occurred in 6 (13.3%) patients. No grade 3/4 tumor flares were observed, and there were no cases of TLS or thrombosis. Conclusion: The combination of ofatumumab, HDMP and lenalidomide is effective and well tolerated in treatment-naive CLL/SLL, even when poor prognostic features are present. Disclosures Komrokji: Novartis: Honoraria, Speakers Bureau; Novartis: Honoraria, Speakers Bureau; Celgene: Honoraria, Research Funding; Novartis: Honoraria, Speakers Bureau; Celgene: Honoraria, Research Funding; Novartis: Honoraria, Speakers Bureau. Locke:Novartis Pharmaceuticals: Other: Scientific Advisor; Cellular BioMedicine Group Inc.: Consultancy; Kite Pharma: Other: Scientific Advisor. Kharfan-Dabaja:Seattle Genetics: Speakers Bureau; Incyte Corp: Speakers Bureau; Alexion Pharmaceuticals: Speakers Bureau. Sokol:Spectrum Pharmaceuticals: Consultancy; Seattle Genetics: Consultancy; Mallinckrodt Pharmaceuticals: Consultancy.

A Phase Ib/II Study of Ibrutinib in Combination with Obinutuzumab-Gazyva As First-Line Treatment for Patients with Chronic Lymphocytic Leukemia > 65 Years Old or with Coexisting Conditions

Blood ◽  
2016 ◽  
Vol 128 (22) ◽  
pp. 2048-2048 ◽  
Author(s):  
Carlos I. Amaya-Chanaga ◽  
Michael Y. Choi ◽  
Natalie Nguyen ◽  
Elizabeth DeVore ◽  
Colin MacCarthy ◽  
...  
Keyword(s):  
Chronic Lymphocytic Leukemia ◽  
Research Funding ◽  
Response Rate ◽  
Single Agent ◽  
Response Assessment ◽  
Lymphocytic Leukemia ◽  
Multiparameter Flow Cytometry ◽  
Phase Ib ◽  
Overall Response ◽  
Grade 3

Abstract Standard treatment for patients (pts) with chronic lymphocytic leukemia (CLL) is rapidly evolving and gradually has incorporated the use of monoclonal antibodies (mAbs) and targeted therapy with small molecules. Single agent Ibrutinib (a first-in-class BTK inhibitor) has shown to be effective in previously untreated (PU) pts including those that are older than 65 or considered unfit to receive chemotherapy-based combinations. The response rate could be higher in pts receiving ibrutinib (overall response of 71% and complete response of 13%) but the mobilization of lymphocytes, which is typically asymptomatic, decreases the response rate due to lack of complete fulfillment of iwCLL criteria. Ibrutinib-induced lymphocytosis could be ameliorated by using mAbs like rituximab or obinutuzumab-Gazyva (G), a third-generation anti-CD20 mAb, and consequently increased the overall response rate. However, there are no data available assessing the combination of ibrutinib and G in the elderly population (> 65 years old) or in those pts < 65 years old where chemotherapy based agents are not indicated. Accordingly, we initiated an open-label phase Ib/II clinical study of Ibrutinib in combination with G for therapy of PU pts with CLL. The study will enroll 32 PU pts with CLL. Pts receive G administered based on FDA dosing recommendations for 6 cycles (28 days/cycle) and Ibrutinib 420mg po. qd for up to 3 years. All pts receive prophylactic medications (acyclovir, allopurinol and low dose glucocorticoids). Pts will undergo response assessment two months after completion of the study treatment by iwCLL criteria, and will be followed for survival during 3 years until initiation of new treatment for CLL, disease progression, consent withdrawal or death, whichever occurs first. Here we present a preliminary analysis of safety / tolerability with the first 9 pts treated with this regimen. The median age of the pts was 63 years ± 8.6. 78% of the pts had a CIRS > 6, 44% had a Rai stage III-IV and 33% had an ECOG performance >2. The median baseline absolute lymphocyte count (ALC) was 96.6 ± 20.2 x103/mm3. Pts showed the following cytogenetic abnormalities: del(13q) in 67%, trisomy 12 in 22% and del(11q) in 11%. None of these pts showed del(17p). Most adverse events (AEs) were grade 1-2 (94%) without development of dose-limiting toxicities. Only one pt (11%) had a grade 1 G-infusion-related reaction (IRR). We did not observe grade 3-4 IRR. We observed neutropenia (all grades: 33%, grade 3-4: 22%), thrombocytopenia (all grades: 78%, grade 3-4: 11%) and anemia (all grades: 44%). 78% of the pts had a decrease in ALC during the first cycle of treatment and two pts had persistent lymphocytosis up to cycle three. There were no cases of febrile neutropenia. Two pts (22%) had grade 1-2 bleeding (one pt with asymptomatic lower gastrointestinal bleeding and the second pt with epistaxis) that resolved spontaneously without requirement of blood transfusion or study treatment discontinuation. One pt (11%) developed community-acquired pneumonia requiring inpatient treatment with IV antibiotics; the study treatment was held until resolution of symptoms and re-initiated at full dose. The most frequent non-hematological AEs were diarrhea, transaminitis, hyperbilirubinemia, hyperglycemia, and electrolyte alterations (grade 1-2). Two pts were evaluable for response assessment by iwCLL criteria. One pt achieved a complete remission with MRDpositivein the bone marrow by multiparameter flow cytometry and the other pt had a partial response due to small residual lymph nodes > 1.5 cm. Overall, Ibrutinib-G combination has been well tolerated. All 9 pts have had favorable clinical and hematological responses. We observed a resolution of the lymphocytosis in 78% of the pts during the first cycle of treatment. We did not observe unexpected AEs with this regimen allowing all 9 pts to continue in the study. The most important finding thus far has been the very low rate of IRR, only one pt (11% - grade 1), and the absence of grade 3-4 IRR, suggesting that ibrutinib can strongly mitigate the incidence and severity of IRR with G. Pt enrollment continues and updated information will be presented at the meeting. Disclosures Hilger-Rolfe: Pharmacyclics: Employment; AbbVie: Employment. Kipps:AbbVie: Consultancy, Honoraria, Research Funding; Gilead: Consultancy, Honoraria, Speakers Bureau; Pharmacyclics, LLC, an AbbVie Company: Consultancy, Honoraria; Celgene: Consultancy, Honoraria, Research Funding; Roche: Consultancy, Honoraria.

Sign in / Sign up

Export Citation Format

Share Document