Engineering tumor stromal mechanics for improved T cell therapy

Area of Science:

• Immunotherapy
• Cancer Biology
• Biomedical Engineering

Background:

• Adoptive cellular therapies (ACT), such as T cell receptor (TCR) and chimeric antigen receptor (CAR) T cell therapies, are leading cancer immunotherapies.
• Their effectiveness against solid tumors remains limited, with the fibrotic tumor stroma identified as a key suppressive factor for engineered T cells.

Purpose of the Study:

• To review recent findings on how tumor stroma suppresses T cell activity.
• To emphasize the role of stromal mechanics in T cell suppression.
• To discuss engineering approaches for studying and overcoming stromal barriers in ACT for solid tumors.

Main Methods:

• Review of current literature on tumor stroma and ACT.
• Analysis of mechanisms of T cell suppression by fibrotic stroma.
• Discussion of engineering strategies to probe and modify stromal effects.

Main Results:

• The fibrotic stroma surrounding solid tumors significantly impairs the function of engineered T cells.
• Stromal mechanical properties play a critical role in T cell suppression.
• Engineering approaches can help elucidate and potentially mitigate these suppressive effects.

Conclusions:

• Understanding the interplay between tumor stroma mechanics and T cell function is crucial for improving ACT efficacy.
• Strategies targeting tumor stromal fibrosis may enhance the therapeutic potential of engineered T cells in solid tumors.