Cytokine Release Syndrome Stratification

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  • Cytokine Release Syndrome Prediction

Apply PSI to inflammation of CAR T-cell product correlates to Grade 3+ CRS, pre-infusion1

Uncover the polyfunctional immune cell subsets which correlate to IRAEs in immunotherapy and discover biomarker correlates to inflammation.

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Research Area

Development Stage



Preinfusion prediction of in vivo CRS in CAR-T patients, not possible with legacy technologies

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polyfunctional cell


IsoPlexis’ PSI is able to stratify severe CRS occurrence in CAR-T patients

polyfunctional cell


PSI of the pre-infusion CAR-T product was found to associate with in vivo CRS

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Follow Our Data

See the latest published data in Inflammatory & Autoimmune Disease

Higher CAR-T product PSI was found to statistically associate with grade 3+ CRS (p = 0.0174). PSI was measured across CD4+ and CD8+ samples from 20 patients.

In particular, there were large increases in the production of effector and stimulatory cytokines in the 3+ CRS cohort. These results suggest that the combination of frequency and cytokine production levels of polyfunctional T cells in the product associate with toxicity to treatment with CAR-T cells.1

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PSI Association with CRS


Detect Critical Differences

In vitro single CD14+ MO PSI differences between MS patient groups with no treatment, versus treated with Tysabri. LPS-stimulated samples show significant upregulation in polyfunctional cytokine signal between untreated MS patients (n=6) and Tysabri treated MS patients (n=3).

The CAR-T product PSI association with in vivo grade 3+ CRS was strengthened when the metric was combined with day 0 IL-15 levels in the patients (p = 0.085). IL-15 levels in the blood were measured by ELISA.1

IL-15 Day 0 + PSI

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