CD4+ CAR T-cell exhaustion associated with early relapse of multiple myeloma after BCMA CAR T-cell therapy.
Blood Adv
; 8(13): 3562-3575, 2024 Jul 09.
Article
en En
| MEDLINE
| ID: mdl-38574299
ABSTRACT
ABSTRACT Multiple myeloma is characterized by frequent clinical relapses after conventional therapy. Recently, chimeric antigen receptor (CAR) T cells targeting B-cell maturation antigen (BCMA) has been established as a treatment option for patients with relapsed or refractory disease. However, although >70% of patients initially respond to this treatment, clinical relapse and disease progression occur in most cases. Recent studies showed persistent expression of BCMA at the time of relapse, indicating that immune-intrinsic mechanisms may contribute to this resistance. Although there were no preexisting T-cell features associated with clinical outcomes, we found that patients with a durable response to CAR T-cell treatment had greater persistence of their CAR T cells than patients with transient clinical responses. They also possessed a significantly higher proportion of CD8+ T-effector memory cells. In contrast, patients with short-lived responses to treatment have increased frequencies of cytotoxic CD4+ CAR T cells. These cells expand in vivo early after infusion but express exhaustion markers (hepatitis A virus cellular receptor 2 [HAVCR2] and T-cell immunoglobulin and mucin domain-containing-3 [TIGIT]) and remain polyclonal. Finally, we demonstrate that nonclassical monocytes are enriched in the myeloma niche and may induce CAR T-cell dysfunction through mechanisms that include transforming growth factor ß. These findings shed new light on the role of cytotoxic CD4+ T cells in disease progression after CAR T-cell therapy.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Linfocitos T CD4-Positivos
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Inmunoterapia Adoptiva
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Antígeno de Maduración de Linfocitos B
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Receptores Quiméricos de Antígenos
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Mieloma Múltiple
Límite:
Female
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Humans
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Male
Idioma:
En
Revista:
Blood Adv
Año:
2024
Tipo del documento:
Article
País de afiliación:
Canadá