T Lymphocyte-Captured DNA Network for Localized Immunotherapy.

Area of Science:

• Biotechnology
• Nanotechnology
• Immunology

Background:

• Efficient isolation of pure, viable immune cells is critical for immunotherapy but remains challenging.
• Current methods often result in cell damage, limiting their therapeutic potential.

Purpose of the Study:

• To develop a novel DNA-based nanobiotechnology for the specific isolation and in situ incubation of T lymphocytes (T-cells).
• To enable responsive release of T-cells and immune adjuvants for localized immunotherapy.

Main Methods:

• Synthesis of ultralong DNA chains with functional multimodules (cell anchors, immune adjuvants) via enzymatic amplification.
• Formation of a DNA network through complementary sequences for T-cell encapsulation and subsequent enzyme-mediated release.
• Administration of the T-cell-containing DNA network to tumor lesions for localized immunotherapy.

Main Results:

• Achieved high purity of captured tumor-infiltrating T-cells (98%) with maintained viability (∼90%).
• Demonstrated successful localized immunotherapy via administration of the T-cell-DNA network to tumor sites.

Conclusions:

• The developed DNA network offers a robust nanobiotechnology for efficient isolation of immune cells.
• This approach shows promise for advancing immunotherapy through improved cell handling and localized treatment delivery.