Program: Oral and Poster Abstracts
Type: Oral
Session: 653. Myeloma: Therapy, excluding Transplantation: Novel Combinations in Immuno-Oncology
Methods: Patients in the DARA + POM-D arm had relapsed or RR MM with ≥2 prior lines of therapy including ≥2 consecutive cycles of LEN and bortezomib. During 28-day treatment cycles patients received DARA 16 mg/kg qw for 2 cycles, then q2w for 4 cycles, and q4w until disease progression (PD). Pomalidomide 4 mg was administered qd for 21 days with D 40 mg qw (20 mg for patients >75 years of age). The primary endpoint was safety and tolerability of DARA in combination with POM-D. Overall response rate (ORR) was a secondary endpoint. Disease responses were evaluated by an independent data safety monitoring board.
Results: A total of 77 patients were enrolled into the DARA + POM-D arm. The median (range) age was 64 (35-86) years and the median number of prior therapies was 3.5 (2-10). Sixty-five percent of the patients were refractory to bortezomib, 30% to carfilzomib, 88% to lenalidomide, and 65% to both a PI and IMiD.
With a median (range) duration of follow-up of 72 (1-423) days, 28 (36%) patients have discontinued treatment due to PD (15 [20%]), adverse events (AEs; 6 [8%]), death or physician’s decision (3 [4%] each), and one (1%) patient withdrawal. The median (range) duration of treatment was 69 days (1-416), and the median (range) number of infusions was 7.5 (1-25). Forty-nine (64%) patients continue on study treatment and enrollment is ongoing.
There was little additional toxicity when DARA was added to POM-D other than DARA-specific infusion related reactions (IRRs; 47/77 patients). Most occurred on Cycle 1 Day 1 (45/47 patients), and the most common (>10%) IRRs were chills (13%), cough (13%), and dyspnea (11%). The most common (>10%) and grade ≥3 adverse events (AEs) are presented in Table 1. Five patients died within 30 days of receiving study treatment due to AEs (4[5%]) or progressive disease (1 [1%]).
In 53 patients with >1 post-baseline assessment, the ORR was 58.5%, with 3 stringent complete responses (sCR), 1 complete response (CR), 12 very good partial responses (VGPR), 15 partial responses (PR), 2 minimal responses, 18 stable disease, and 2 PD. Many responses deepened over time. Median (range) time to first response was 30 (28-92) days. After a median follow-up of 148 days, 4 out of 31 responders developed PD. Among the evaluable double refractory patients (n = 40), there was 1 sCR, 1 CR, 10 VGPRs, and 11 PRs with an ORR of 57.5%.
Conclusions: The addition of DARA to POM-D was well tolerated and did not result in additional toxicities with the exception of DARA-related infusion reactions. Deep and durable responses were observed quickly, along with a high response rate. Study enrollment is ongoing and data will be updated at the meeting.
Table 1. Most Common (>10%) Adverse Events (N = 77)
|
|
|
Adverse Event, n (%) |
Any Grade |
Grade ≥3 |
Neutropenia |
42 (54.5%) |
39 (50.6%) |
Anemia |
28 (36.4%) |
16 (20.8%) |
Fatigue |
28 (36.4%) |
4 (5.2%) |
Cough |
24 (31.2%) |
0 |
Nausea |
21 (27.3%) |
0 |
Dyspnea |
20 (26.0%) |
5 (6.5%) |
Diarrhea |
19 (24.7%) |
1 (1.3%) |
Leukopenia |
19 (24.7%) |
12 (15.6%) |
Thrombocytopenia |
17 (22.1%) |
8 (10.4%) |
Pyrexia |
16 (20.8%) |
1 (1.3%) |
Dizziness |
15 (19.5%) |
0 |
Chills |
14 (18.2%) |
0 |
Nasal Congestion |
14 (18.2%) |
0 |
Upper Respiratory Tract Infection |
14 (18.2%) |
1 (1.3%) |
Back Pain |
13 (16.9%) |
2 (2.6%) |
Constipation |
13 (16.9%) |
0 |
Tremor |
13 (16.9%) |
2 (2.6%) |
Insomnia |
12 (15.6%) |
1 (1.3%) |
Lymphopenia |
11 (14.3%) |
7 (9.1%) |
Muscle Spasms |
11 (14.3%) |
0 |
Vomiting |
11 (14.3%) |
0 |
Arthralgia |
9 (11.7%) |
1 (1.3%) |
Pruritus |
9 (11.7%) |
0 |
Throat Irritation |
9 (11.7%) |
0 |
Anxiety |
8 (10.4%) |
0 |
Headache |
8 (10.4%) |
0 |
Hypertension |
8 (10.4%) |
4 (5.2%) |
Musculoskeletal Chest Pain |
8 (10.4%) |
2 (2.6%) |
Peripheral Edema |
8 (10.4%) |
1 (1.3%) |
Disclosures: Chari: Celgene: Consultancy , Membership on an entity’s Board of Directors or advisory committees , Research Funding ; Millennium/Takeda: Consultancy , Research Funding ; Array Biopharma: Consultancy , Other: Institutional Research Funding , Research Funding ; Novartis: Consultancy , Research Funding ; Biotest: Other: Institutional Research Funding ; Onyx: Consultancy , Research Funding . Lonial: Janssen: Consultancy , Research Funding ; Onyx: Consultancy , Research Funding ; Novartis: Consultancy , Research Funding ; Bristol-Myers Squibb: Consultancy , Research Funding ; Janssen: Consultancy , Research Funding ; Onyx: Consultancy , Research Funding ; Celgene: Consultancy , Research Funding ; Millennium: Consultancy , Research Funding . Suvannasankha: Celgene: Honoraria , Research Funding ; Onyx: Honoraria , Research Funding . Arnulf: Janssen: Membership on an entity’s Board of Directors or advisory committees ; Celgene: Membership on an entity’s Board of Directors or advisory committees . Qin: Janssen: Employment . Masterson: Janssen: Employment . Nottage: Janssen: Employment . Schecter: Janssen: Employment . Ahmadi: Janssen: Employment . Weiss: Janssen and Millennium: Consultancy ; Janssen and Onclave: Research Funding . Krishnan: Millenium: Speakers Bureau ; BMS: Consultancy ; Jazz: Consultancy ; Janssen: Consultancy ; Onyx: Speakers Bureau ; Celgene: Consultancy , Speakers Bureau . Lentzsch: Celgene: Consultancy ; Janssen: Consultancy ; Axiom: Honoraria ; Novartis: Consultancy ; BMS: Consultancy .
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