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Panminerva Medica 2020 Sep 21

DOI: 10.23736/S0031-0808.20.04146-4

Copyright © 2020 EDIZIONI MINERVA MEDICA

lingua: Inglese

CAR T cells targeting options in the fight against multiple myeloma

Fabio NICOLINI 1, Sara BRAVACCINI 2, Massimiliano MAZZA 1 , Alicja M. GRUSZKA 3, Marcella TAZZARI 1, Beatriz MARTÍN-ANTONIO 4, 5, Manel JUAN 6, Toni IBRAHIM 7, Roberta MALTONI 8, Giovanni MARTINELLI 9, Claudio CERCHIONE 9

1 Immunotherapy, Cell Therapy and Biobank (ITCB), Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Forlì-Cesena, Italy; 2 Biosciences Laboratory, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Forlì-Cesena, Italy; 3 Department of Experimental Oncology, Istituto Europeo di Oncologia IRCCS, Milan, Italy; 4 Institut d’Investigacions Biomèdiques August Pi i Sunyer Hospital Clinic Barcelona, Barcelona, Spain; 5.Josep Carreras Leukaemia Research Institute, Barcelona, Spain; 6 Institut d’Investigacions Biomèdiques August Pi i Sunyer Hospital, Clinic of Immunology, Barcelona, Spain; 7 Osteoncology and Rare Tumors Center, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Forlì-Cesena, Italy; 8 Department of Medical Oncology, Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Forlì-Cesena, Italy; 9 Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, Meldola, Forlì-Cesena, Italy


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INTRODUCTION: Multiple myeloma (MM) is a hematological malignancy in which patients present with bone marrow infiltration of clonal terminally-differentiated plasma cells. Monoclonal protein in the serum and/or urine are frequently detected. Over the past decade, important progress has been made in the comprehension of disease biology and treatment personalization. Much work has been put into the development of chimeric antigen receptor (CAR) gene-modified T-cell therapy thought to be a promising therapeutic option for pluritreated patients with refractory MM.
EVIDENCE ACQUISITION: We performed an analysis of clinical trials registered at the international repository clinicaltrials.gov using “CAR” OR “CAR T” AND “multiple myeloma” as search terms to understand what were the antigens targeted by CAR T strategies and what was the trade-off of their exploitation. The search retrieved a list of 103 trials that was manually filtered to eliminate follow-up and observational or not-pertinent trials.
EVIDENCE SYNTHESIS: Most studies employed anti-BCMA targeting either alone (62/94; 66%), or in combination with a second target (12/94; 13%). The second target most studied was SLAMF7 (CD319) explored by 4/94 (4%) clinical trials. Other antigens investigated and described here include: CD44v6, CD38, CD138, MUC1, CD56, CD19, Igk light chain, Lewis Y, CD229 and GPRC5D.
CONCLUSIONS: Targeting an appropriate antigen(s) is the key to both safety and efficacy of CAR T approaches in MM as there is dearth of tumor-specific antigens. Most antigens tested are merely enriched on MM cells. Working with tumor-enriched antigens requires careful assessment of the balance between harm (toxicity) and benefit (disease eradication) to the patient. This review provides an up-to-date overview of the avenues that are being explored.


KEY WORDS: Multiple myeloma; CAR-T; BCMA; CD44v6; CD56; CD38; CD138; CD19; SLAMF7; Igk light chain; Lewis Y; MUC1; CD229; GPRC5D

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