Treatment of Multiple Myeloma Using Chimeric Antigen Receptor T Cells with Dual Specificity.

Abstract:

:Chimeric antigen receptor (CAR) T-cell therapy has shown remarkable successes in fighting B-cell leukemias/lymphomas. Promising response rates are reported in patients treated with B-cell maturation antigen (BCMA) CAR T cells for multiple myeloma. However, responses appear to be nondurable, highlighting the need to expand the repertoire of multiple myeloma-specific targets for immunotherapy and to generate new CAR T cells. Here, we developed a "dual-CAR" targeting two multiple myeloma-associated antigens and explored its safety and efficacy. To reduce the "off-target" toxicity, we used the recognition of paired antigens that were coexpressed by the tumor to induce efficient CAR T-cell activation. The dual-CAR construct presented here was carefully designed to target the multiple myeloma-associated antigens, taking into consideration the distribution of both antigens on normal human tissues. Our results showed that the CD138/CD38-targeted dual CAR (dCAR138-38) elicited a potent anti-multiple myeloma response both in vitro and in vivo NSG mice transplanted with a multiple myeloma cell line and treated with dCAR138-38 showed median survival of 97 days compared with 31 days in the control group treated with mock-lymphocytes. The dCAR138-38 showed increased specificity toward cells expressing both targeted antigens compared with single-antigen-expressing cells and low activity toward primary cells from healthy tissues. Our findings indicated that the dCAR138-38 may provide a potent and safe alternative therapy for patients with multiple myeloma.

journal_name

Cancer Immunol Res

authors

Globerson Levin A,Rawet Slobodkin M,Waks T,Horn G,Ninio-Many L,Deshet Unger N,Ohayon Y,Suliman S,Cohen Y,Tartakovsky B,Naparstek E,Avivi I,Eshhar Z

doi

10.1158/2326-6066.CIR-20-0118

subject

Has Abstract

pub_date

2020-12-01 00:00:00

pages

1485-1495

issue

12

eissn

2326-6066

issn

2326-6074

pii

2326-6066.CIR-20-0118

journal_volume

8

pub_type

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