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Updated: Sep 11, 2025

Non-Viral Engineering of Primary Human T Cells via Homology-Mediated End-Joining Targeted Integration of Large DNA Templates
06:10

Non-Viral Engineering of Primary Human T Cells via Homology-Mediated End-Joining Targeted Integration of Large DNA Templates

Published on: May 9, 2025

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Computational structural optimization enhances IL13Rα2 - B7-H3 tandem CAR T cells to overcome

Michaela M Meehl1, Kalyan Immadisetty2, Vikas D Trivedi3

  • 1Department of Bone Marrow Transplantation and Cellular Therapy (BMTCT), St. Jude Children's Research Hospital, Memphis, TN 38105, USA; College of Graduate Health Sciences, University of Tennessee Health Science Center, Memphis, TN 38163, USA.

Molecular Therapy : the Journal of the American Society of Gene Therapy
|August 14, 2025
PubMed

Insights

Designing a dual-targeting chimeric antigen receptor (CAR) T cell therapy using computational methods improved its ability to fight tumors. This optimized tandem CAR T cell therapy overcomes tumor escape mechanisms for better cancer treatment.

Area of Science:

  • Immunotherapy
  • Cancer Biology
  • Computational Biology

Background:

  • Chimeric antigen receptor (CAR) T cell therapy shows efficacy against malignancies.
  • Tumor antigen heterogeneity and downregulation enable cancer cells to evade monospecific CAR T cells.
  • Tandem CARs targeting multiple antigens offer a strategy to overcome tumor escape.

Purpose of the Study:

  • To design and optimize an IL-13Rα2-B7-H3 tandem CAR T cell therapy.
  • To address challenges in tandem CAR surface expression and function.
  • To enhance antitumor efficacy against tumors exhibiting antigen heterogeneity.

Main Methods:

  • Systematic evaluation of 24 tandem CAR constructs with variations in scFv positioning, linkers, and amino acids.
  • Identification and optimization of a critical "trouble region" using computational approaches.
  • In vivo efficacy studies comparing optimized tandem CAR T cells with monospecific CAR T cells.

Main Results:

  • The original tandem CAR construct failed to express on the cell surface.
  • Optimization using computational strategies rescued CAR surface expression and improved function.
  • Optimized tandem CAR T cells demonstrated superior tumor elimination compared to monospecific CAR T cells in vivo.

Conclusions:

  • Structure-guided computational strategies can restore surface expression and enhance antitumor efficacy of tandem CAR T cells.
  • Computational methods are essential for designing synthetic proteins like CARs.
  • Optimized tandem CAR T cell therapy offers a promising approach to overcome tumor escape and improve cancer treatment outcomes.
Keywords:
CAR T cellsIL13Rα2 – B7-H3antibody engineeringantigen escapecell surface expression optimizationcomputational structure predictionexpression fitness scorelinker engineeringprotein engineeringtandem bispecific CAR

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