中和 IFN-γ 提高 B 细胞恶性肿瘤中 CAR-T 细胞治疗的安全性而不损害疗效

Chimeric antigen receptor T (CAR-T) cell therapy may achieve long-lasting remission in patients with B-cell malignancies not responding to conventional therapies.

However, potentially severe and hard-to-manage side effects, including cytokine release syndrome (CRS), neurotoxicity and macrophage activation syndrome, and the lack of pathophysiological experimental models limit the applicability and development of this form of therapy.

Here we present a comprehensive humanized mouse model, by which we show that IFN neutralization by the clinically approved monoclonal antibody, emapalumab, mitigates severe toxicity related to CAR-T cell therapy.

We demonstrate that emapalumab reduces the pro-inflammatory environment in the model, thus allowing control of severe CRS and preventing brain damage, characterized by multifocal hemorrhages.

Importantly, our in vitro and in vivo experiments show that IFN inhibition does not affect the ability of CD19-targeting CAR-T (CAR. CD19-T) cells to eradicate CD19+ lymphoma cells.

Thus, our study provides evidence that anti-IFN treatment might reduce immune related adverse effect without compromising therapeutic success and provides rationale for an emapalumab-CAR. CD19-T cell combination therapy in humans.