Related Experiment Video
Updated: Aug 25, 2025

A Nonviral Approach to Generate Transient Chimeric Antigen Receptor T Cells Using mRNA for Cancer Immunotherapy
Published on: February 21, 2025
Next generation T cell therapies for solid cancers
John B Haanen1, Ton N Schumacher2
1Division of Medical Oncology, Netherlands Cancer Institute, 1066 CX Amsterdam, The Netherlands; Division of Molecular Oncology and Immunology, Netherlands Cancer Institute, 1066 CX Amsterdam, The Netherlands; Department of Clinical Oncology, Leiden University Medical Center, 2300 RC Leiden, The Netherlands.
Abstract:
Tumor-infiltrating lymphocytes show consistent clinical benefit in metastatic melanoma, but they are a poorly defined product with variable antitumor activity. In this issue, Palmer et al.1 create for clinical testing a cell product consisting of highly functional tumor-reactive T cells by knocking out CISH, an inhibitor of T cell activation.
Insights
Researchers enhanced tumor-infiltrating lymphocytes for treating metastatic melanoma by knocking out CISH. This creates a more functional cell product for improved clinical benefit in cancer immunotherapy.
Area of Science:
- Immunology
- Oncology
- Cell Biology
Background:
- Tumor-infiltrating lymphocytes (TILs) offer clinical benefit in metastatic melanoma.
- Current TIL products are poorly defined and have variable antitumor activity.
Purpose of the Study:
- To develop a more effective TIL product for clinical testing.
- To enhance the functionality of tumor-reactive T cells.
Main Methods:
- Knockout of CISH (cytokine-inducible SH2-containing protein) in T cells.
- Generation of a novel cell product for cancer immunotherapy.
Main Results:
- Creation of highly functional tumor-reactive T cells.
- Development of a cell product suitable for clinical testing.
Conclusions:
- Knocking out CISH is a promising strategy to improve TIL therapy for metastatic melanoma.
- This approach could lead to more consistent and potent antitumor activity in cancer patients.
Related Concept Videos
Tumor Immunotherapy
Targeted Cancer Therapies
There are several types of targeted therapies against...
Cancer Vaccines
Cancer vaccines come in two categories: preventive (prophylactic) and treatment (active). Preventive vaccines, such as the Human Papillomavirus (HPV) vaccine, protect against viruses that cause certain...
Treatment Resistant Cancers
Stem Cell Therapy for Tissue Regeneration
Types of Stem Cells used in Stem Cell Therapy
The two main cell...
Cancer Therapies
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...

