The abstract posted today on the ASH Annual Meeting website reported on four patients who received MB-106 at dose level 1 (“DL1”), 3.3×106 cells/kg: two patients with follicular lymphoma (“FL”) who achieved complete response as demonstrated by both PET-CT and bone marrow biopsy, one patient with Waldenstrom macroglobulinemia (“WM”) who achieved a very good partial response (“VGPR”), and one patient with transfusion-dependent hairy cell leukemia variant (“HCL-v”) who continued to have stable disease with decreased bone marrow disease and who achieved complete transfusion independence which is ongoing at 6 months. All patients displayed MB-106 expansion, with peak levels between 7-14 days post-infusion, and CAR-T cell persistence is ongoing at 6 months. From a safety perspective, 3 patients experienced Grade 1 cytokine release syndrome and no occurrences of immune effector cell-associated neurotoxicity syndrome were reported. Dose-limiting toxicities (“DLT”) were monitored through day 28, and no DLTs were observed at DL1. Because of this favorable safety profile, MB-106 is infused in the outpatient setting if allowed by the institution, except for the first patient in each DL cohort, who is kept for overnight observation after MB-106 administration.
All four patients were heavily pre-treated, with a median of 5.5 prior lines of treatment. The WM patient in particular had nine prior treatments, including autologous stem cell transplant, and a high disease burden, and the patient’s VGPR was notable for complete metabolic response by PET-CT, morphologic clearance of lymphoma in bone marrow and resolution of the immunoglobulin M paraprotein. Other high-risk features were observed in each of the two FL patients: progression of disease within 24 months of first-line treatment in one patient and prior CD19-targeted CAR-T therapy in the other. Finally, the HCL-v patient received non-conforming material following FDA authorization.
Details of the presentation are as follows:
Title: Efficacy and Safety of a Third Generation CD20 CAR-T (MB-106) for Treatment of Relapsed/Refractory Indolent B-Cell Non-Hodgkin Lymphoma: Phase-1 Results from a Multicenter Trial
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Abstract Number: 2102
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For more information, please visit the 65th ASH Annual Meeting and Exposition website at https://www.hematology.org/meetings/annual-meeting/abstracts.
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This press release contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, each as amended. Such statements, which are often indicated by terms such as “anticipate,” “believe,” “could,” “estimate,” “expect,” “goal,” “intend,” “look forward to,” “may,” “plan,” “potential,” “predict,” “project,” “should,” “will,” “would” and similar expressions. The Company’s forward-looking statements, include, but are not limited to, any statements relating to our growth strategy and product development programs, including the timing of and our ability to make regulatory filings such as INDs and other applications and to obtain regulatory approvals for our product candidates, statements concerning the potential of therapies and product candidates, statements about the Company’s expectations with respect to the consummation of the sale of its manufacturing facility, its entry into a manufacturing services agreement with the prospective purchaser of the facility and its ability to obtain its MB-106 drug product pursuant to such manufacturing services agreement and any other statements that are not historical facts. Actual events or results may differ materially from those described in this press release due to a number of risks and uncertainties. Risks and uncertainties include, among other things, risks related to the satisfaction of the conditions to closing the sale of the Company’s manufacturing facility in the anticipated timeframe or at all; whether the prospective purchaser of the Company’s manufacturing facility is able to successfully perform its obligation to produce the Company’s products under the manufacturing services agreement on a timely basis and to acceptable standards; disruption from the sale of the Company’s manufacturing facility making it more difficult to maintain business and operational relationships; negative effects of the announcement or the consummation of the transaction on the market price of the Company’s common stock; significant transaction costs; the development stage of the Company’s primary product candidates, our ability to obtain, perform under, and maintain financing and strategic agreements and relationships; risks relating to the results of research and development activities; risks relating to the timing of starting and completing clinical trials; uncertainties relating to preclinical and clinical testing; our dependence on third-party suppliers; our ability to attract, integrate and retain key personnel; the early stage of products under development; our need for substantial additional funds; government regulation; patent and intellectual property matters; competition; as well as other risks described in Part I, Item 1A, “Risk Factors,” in our Annual Report on Form 10-K filed on
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