NYMC Faculty Publications

A Framework Integrating Multiscale in Silico Modeling and Experimental Data Predicts CAR-NK Cell Cytotoxicity Across Target Cell Types

Saeed Ahmad, Steve and Cindy Rasmussen Institute for Genomic Medicine, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, OH 43205.
Kun Xing, Center for Childhood Cancer Research, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, OH 43205.
Marcelo S. Pereira, Center for Childhood Cancer Research, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, OH 43205.
Stephanie Castle, Center for Childhood Cancer Research, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, OH 43205.
Harshana Rajakaruna, Steve and Cindy Rasmussen Institute for Genomic Medicine, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, OH 43205.
Indrani Nayak, Steve and Cindy Rasmussen Institute for Genomic Medicine, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, OH 43205.
William C. Stewart, GIG Statistical Consulting, Columbus, OH 43215.
Kyle A. Beckwith, Center for Childhood Cancer Research, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, OH 43205.
Mitchell S. Cairo, Department of Pediatrics, New York Medical College, Valhalla, NY 10595.
Meisam Naeimi Kararoudi, Center for Childhood Cancer Research, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, OH 43205.
Dean A. Lee, Center for Childhood Cancer Research, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, OH 43205.
Jayajit Das, Steve and Cindy Rasmussen Institute for Genomic Medicine, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, OH 43205.

Author Type(s)

Faculty

DOI

10.1073/pnas.2500319123

Journal Title

Proceedings of the National Academy of Sciences of the United States of America

First Page

e2500319123

Document Type

Article

Publication Date

2-3-2026

Department

Pediatrics

Keywords

CAR-NK, cytotoxicity, multiscale modeling, quantitative flow cytometry, receptors

Disciplines

Medicine and Health Sciences

Abstract

Natural killer (NK) cells may be engineered with chimeric antigen receptors (CARs) to recognize tumor-associated antigens which bolsters their antitumor activity. More so than CAR-T cells, CAR-NK cell responses result from an integration of signals from a wider range of innate activating cytotoxic receptors, inhibitory receptors, and adhesion receptors in addition to the engineered CAR, making computational modeling of CAR-NK cell cytotoxicity more difficult than CAR-T cells. Uncovering mechanisms and predicting tumor cell responses to CAR-NK cytotoxicity is essential for improving therapeutic efficacy. The complexity of these effector-target interactions and the donor-to-donor variations in NK cell receptor (NKR) repertoire preclude the use of predictive models based on a single receptor, requiring function to be determined experimentally for each donor, CAR, and target combination. Computational modeling generates frameworks that allow the relationships of these factors to biologic outcomes to be explored without resource-consuming experiments. Here, we developed a computational mechanistic multiscale model which considers heterogenous expression of CARs, NKRs, adhesion receptors, and their cognate ligands, signal transduction, and NK cell-target cell population kinetics. The model is trained with quantitative flow cytometry and in-vitro cytotoxicity data and accurately predicts the short-term, long-term, and in-vivo cytotoxicity of CAR-NK cells. Furthermore, using Pareto optimization we explored the effect of CAR proportion and NK cell signaling on the differential cytotoxicity of CD33CAR-NK cells to cancer and healthy cells. This model can be extended to predict CAR-NK cytotoxicity across many antigens and tumor targets and serves as a tool to mechanistically explore CAR-NK signaling and biology.

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