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The following is a listing of clinical trials for patients with multiple myeloma who have received one to two prior lines of therapy.
The following is a listing of clinical trials for patients with multiple myeloma who have received three or more prior lines of therapy.
December 02, 2020
As of May 15, 2020, 82 pts received MEDI2228 during dose escalation and expansion. All pts had received prior therapy with an IMiD, PI, and mAb: lenalidomide, 76 (94%); pomalidomide, 68 (84%); bortezomib, 77 (95%); carfilzomib, 64 (79%); and daratumumab, 71 (87%). Pts received between 2–11 lines of prior regimens. At 0.2 mg/kg, 2 pts experienced DLTs (grade 3/4 thrombocytopenia) without bleeding; no DLTs were reported for other dose levels. The maximum tolerated dose was 0.14 mg/kg Q3W. Treatment-related adverse events (TEAEs) occurring in ≥20% of pts in the 0.14 mg/kg cohort were photophobia (53.7%), thrombocytopenia (31.7%), rash (29.3%), increased gamma-glutamyltransferase (24.4%), dry eye (19.5%), and pleural effusion (19.5%). No reports of keratopathy or visual acuity loss were observed in the 0.14 mg/kg cohort. The TEAE profiles at lower-dose levels were similar but with lower incidences compared with the 0.14 mg/kg level. Efficacy was demonstrated at all dose levels (dose, objective response rate [ORR], [n]): 0.0125 mg/kg, 33.3% [1/3]; 0.025 mg/kg, 16.7% [1/6]; 0.05 mg/kg, 33.3% [3/9]; 0.10 mg/kg, 27.8% [5/18]; 0.14 mg/kg, 61.0% [25/41]; 0.2 mg/kg, 40.0%, [2/5]. In the 0.14 mg/kg cohort, ORR was 61.0% (95% confidence interval [CI]: 44.5%, 75.8%); there were 10 (24.4%) very good partial responses (VGPRs), 15 (36.6%) partial responses, and 3 (7.3%) minimal responses. Four of the VGPR pts were immunofixation negative. Most (90.2%) pts in the 0.14 mg/kg cohort had received prior daratumumab. Median duration of response (DOR) in the 0.14 mg/kg cohort was not reached. MEDI2228 exhibited linear PK at doses of ≥0.05 mg/kg Q3W that was minimally impacted by circulating levels of soluble BCMA at baseline. There was no difference in BCMA expression by IHC in the bone marrow of responders compared with nonresponders. Thirty-six pts in the 0.14 mg/kg cohort discontinued treatment due to adverse events (n=24), progressive disease (n=8), patient decision (n=2), investigator decision (n=1), or death (n=1).
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