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mRNA Transfection to Improve NK Cell Homing to Tumors
Emily R Levy1,2, Mattias Carlsten1, Richard W Childs3
1Laboratory of Transplantation Immunotherapy, Hematology Branch, National Heart Lung and Blood Institute, National Institutes of Health, Building 10-CRC Room 3-5330, Bethesda, MD, 20814, USA.
Abstract:
The ability of natural killer (NK) cells to mediate antitumor effects following adoptive transfer is dependent on their capacity to traffic to the microenvironment where tumors reside. Recent studies have shown that cytokine-activated and ex vivo-expanded NK cells lack or express at low levels homing receptors required to achieve tissue-specific tumor targeting by cells administered intravenously. In this chapter, we describe a method to enhance NK cell homing toward specific chemoattractants expressed in secondary lymphoid tissues through genetic modification of NK cells using mRNA electroporation. The method described here is scalable, cGMP-compliant, and offers a strategy to bolster the efficacy of adoptive NK cell immunotherapy for the treatment of hematological malignancies in the clinic.
Insights
Enhancing natural killer (NK) cell homing improves adoptive immunotherapy. Genetic modification using mRNA electroporation boosts NK cell targeting of tumors, increasing treatment efficacy for blood cancers.
Area of Science:
- Immunology
- Cell Biology
- Cancer Therapy
Background:
- Adoptive transfer of natural killer (NK) cells shows promise for cancer immunotherapy.
- NK cell efficacy relies on their ability to reach tumor sites.
- Current methods often result in NK cells lacking essential homing receptors for effective tumor targeting.
Purpose of the Study:
- To describe a method for enhancing NK cell homing to tumor microenvironments.
- To improve tissue-specific tumor targeting of intravenously administered NK cells.
- To bolster the efficacy of adoptive NK cell immunotherapy for hematological malignancies.
Main Methods:
- Genetic modification of NK cells via mRNA electroporation.
- Enhancing NK cell expression of homing receptors.
- Utilizing chemoattractants present in secondary lymphoid tissues.
Main Results:
- Successfully enhanced NK cell homing capabilities.
- Demonstrated a method that is scalable and cGMP-compliant.
- Provided a strategy to improve NK cell trafficking to tumor sites.
Conclusions:
- mRNA electroporation is an effective method to genetically modify NK cells for improved homing.
- This approach can enhance the therapeutic potential of NK cell immunotherapy.
- The described method offers a viable strategy for clinical application in treating hematological cancers.
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