News Release Details
RXi Pharmaceuticals and Karolinska Institutet Enter into Collaboration to Develop sd-rxRNA Compounds to Improve Functionality and Persistence of T Cells and NK Cells for the Advancement of Immuno-Oncology Therapeutics for Solid Tumors
This work will expand on the recently published results from the Kiessling group demonstrating that an sd-rxRNA targeting PD-1 can enhance TIL antitumor activity against melanoma cells in vitro, further showing that ex vivo treatment with the sd-rxRNA compounds was easily incorporated into a clinically relevant rapid expansion protocol for TILs.1
Immunotherapy of cancer has become increasingly important in clinical practice over the recent decade. By activating the patient's immune system, immunotherapy treatments have shown remarkable promise in extending the lifespan of previously untreatable cancer patients. Adoptive cell therapy is an emerging immunotherapy approach which uses immune cells, such as T-lymphocytes or NK cells that are isolated from the patient or retrieved from allogeneic immune cell banks, and then expanded and in some cases processed to express tumor-binding receptors.
A new and important step in this ex-vivo processing of the immune cells is in development where self-delivering RNAi compounds (sd-rxRNA®) are used to eliminate the expression of immunosuppressive receptors or proteins from the therapeutic immune cells, thereby making them less sensitive to tumor resistance mechanisms and improving their ability to destroy tumor cells. In this way, sd-rxRNA therapeutic compounds can be used to weaponize therapeutic immune cells to attack cancer and ultimately provide patients battling terminal cancers with a powerful new treatment option that goes beyond current treatment modalities.
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1Ligtenberg et al., Self-Delivering RNAi Targeting PD-1 Improves Tumor-Specific T Cell Functionality for Adoptive Cell Therapy of Malignant Melanoma, Molecular Therapy, Vol. 26 No
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