The purpose of this study is to assess safety, efficacy, pharmacokinetic (PK)/pharmacodynamic (PD), and immunogenicity with ISB 1342 in subjects with relapsed/refractory multiple myeloma.
This trial is currently open and accepting patients.
The following criteria is a partial list of reasons why patients may be eligible to participate in this clinical trial. Further evaluation with a medical professional is required.
Enrollment: 245 patients (estimated)View More
July 07, 2022
As of July 7, 2022, 24 patients had received a once weekly, IV infusion of ISB 1342 in 6 dose-escalation groups from 0.2/0.3 mg/kg dose level to 1.0 / 4.0 mg/kg dose level. The majority were males (63%) and white (67%); 21% were black or African American. The median age was 67 years (range, 54-76) and the median disease duration since onset was 6.7 years (range, 2.8-22.2). The median number of prior anti-myeloma lines of therapy was 6 (range 1-10); 8 (33%) patients had received prior B cell maturation antigen (BCMA)-targeted therapy including bi-specifics, antibody drug conjugates (ADCs) and/or cell therapies. Twenty-one (88%) patients were considered to be triple-refractory and 18 (75%) were considered to be penta-refractory. Twenty-two (92%) patients experienced treatment-related adverse events (TRAEs) of any grade. Most TRAEs were grade 1-2, including infusion related reactions (42%), anemia (21%), cytokine release syndrome (CRS, 17%), thrombocytopenia (17%), and diarrhoea (13%). Nine (38%) patients had grade 3 or higher TRAEs with only infusion related reactions occurring in more than 5% of patients (17%, all grade 3 events). No grade 5 TRAE was observed. One dose limiting toxicity (DLT), a Grade 3 delirium was observed in a 73-year-old patient treated at 0.3/0.55 dose level after the third dose of ISB 1342, and who also presented with Grade 4 pneumonia; three additional patients were enrolled at that dose level, no other DLT was observed, and dose escalation continued. The median duration of treatment was 2 months (range, 1-5). The ISB 1342 serum concentration-time profiles showed Cmax near the end of infusion, followed by a biphasic decline. The serum exposures showed a dose-dependent increase following both Q2W and Q1W regimens. With the Q1W regimen, the serum Ctrough was higher than that with the Q2W regimen at similar dose levels. Transient increases in serum cytokine levels were observed within 24 hours following ISB 1342 administration, including IFNg, TNFa, IL-2, IL-6 and IL-10.
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