idecabtagene vicleucel 治疗后出现严重低磷血症，与细胞因子释放综合征严重程度无关

We retrospectively analyzed patients aged 18 years with B-cell malignancies who received CAR-T cell therapy in our institution. All available laboratory data were collected for 21 days after CAR-T cell infusion; clinical and laboratory data were extracted from electronic medical records.

A total of 108 patients were treated with CAR-T cell therapy (tisa-cel, n = 56; liso-cel, n = 11; axi-cel, n = 28; ide-cel, n = 13). The cumulative incidence of hypophosphatemia and severe hypophosphatemia were significantly higher in the ide-cel group than the other CAR-T products group (92.3% versus 67.5%, P = 0.0045, and 15.4% versus 2.1%, P = 0.017), Patients treated with ide-cel had significantly lower serum iP levels from day -4 to 8 compared to other CAR-T products. As previous reports, the cumulative incidence of hypophosphatemia in the other CAR-T products group was significantly higher in the severe CRS group than in the mild CRS group (84.0% versus 60.0%, P = 0.0002). In contrast, there was no significant difference between the two groups in the ide-cel group (65% versus 100%, P = 0.13).

Our results suggest that and that it is important to monitor iP kinetics more carefully because patients treated with ide-cel complicate severe hypophosphatemia, regardless of CRS severity.