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Engineering T cells to enhance 3D migration through structurally and mechanically complex tumor microenvironments.

Erdem D Tabdanov1,2,3, Nelson J Rodríguez-Merced4,5, Alexander X Cartagena-Rivera6

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Understanding T cell migration in tumors is key for cancer immunity. We found that microtubule instability enhances T cell movement in 3D tumor environments, suggesting new strategies for immunotherapy.

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Area of Science:

  • Immunology
  • Cell Biology
  • Biomaterials Engineering

Background:

  • T cell migration is crucial for antitumor immunity but is hindered by complex tumor microenvironments.
  • Understanding the mechanical and structural factors influencing T cell migration is vital for improving immunotherapies.

Purpose of the Study:

  • To engineer nanotextured elastic platforms to study T cell migration in tumor-mimetic environments.
  • To define how T cell contractility and microtubule dynamics influence migration in response to mechanical cues.
  • To identify strategies for enhancing T cell migration through 3D tumor matrices.

Main Methods:

  • Engineered nanotextured elastic platforms to mimic tumor microenvironments.
  • Studied T cell migration in 3D matrices and live tumors.
  • Manipulated microtubule stability and Rho pathway-dependent contractility.
  • Utilized pharmacological and genome engineering approaches.

Main Results:

  • Identified a mechanical optimum for T cell migration.
  • Demonstrated that microtubule instability promotes T cell migration via increased cortical contractility.
  • Showed that microtubule-stabilizing chemotherapies impair T cell migration.
  • Engineered T cells exhibited enhanced migration through 3D matrices and tumor volumes.

Conclusions:

  • T cell migration is modulated by the balance between microtubule stability and contractility.
  • Microtubule instability enhances T cell navigation in 3D tumor environments.
  • Engineering T cells for improved 3D migration offers a potential strategy to boost immune therapeutics' efficacy.