Review
A Nature (Leukemia) piece takes the unglamorous but decisive angle on CAR‑T in myeloma: pharmacokinetics — what expands, when it peaks, and how long it persists. The core argument is simple: with living drugs, the infusion number is only the opening move; expansion kinetics and persistence correlate with response and toxicity, but are not consistently measured or standardized across trials. That matters as myeloma shifts toward earlier‑line CAR‑T and “sequence wars” vs bispecifics, because clinicians will need better comparability than “ORR vs ORR”. The next hard problem is operational: turning PK thinking into monitoring that busy clinics can actually run.
Source: Nature (Leukemia)
Toxicity Management
A retrospective analysis of 195 patients treated with axi‑cel for R/R large B‑cell lymphoma (Jan 2018–Apr 2023) compares a newer toxicity protocol (earlier steroids + anakinra) to prior practice. In the post‑change cohort (N=103), anakinra use rose to 22% (vs 5%) and steroid use to 88% (vs 71%), with no increase in cumulative steroid dose. The headline outcomes: a significant reduction in duration of CRS (−0.93 days adjusted) and ICANS (−2.49 days adjusted), while ICU admissions and length of stay were similar. The implication is pragmatic: getting ahead of toxicity may buy days of neurologic recovery without necessarily “turning off” the CAR‑T.
Source: Blood Advances (PubMed 41855506)
Translational
GEN reports on a dual‑vector approach designed to generate CAR‑T cells in vivo rather than manufacturing them ex vivo — the long‑term dream for speed, cost, and access. The scientific bet is that delivery + control can be made reliable enough to produce therapeutic CAR expression without unacceptable off‑target effects. Even if the first applications end up being narrower (e.g., hematologic targets with clearer biomarkers), the platform implication is huge: if you can remove the factory step, you can change the geography of who gets CAR‑T. The near‑term question is safety and dose control, not hype.
Source: GEN (Genetic Engineering & Biotechnology News)