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IND-Enabling Studies for a Clinical Trial to Genetically Program a Persistent Cancer-Targeted Immune System
Cristina Puig-Saus1,2, Giulia Parisi3,2, Angel Garcia-Diaz3,2
1Division of Hematology-Oncology, Department of Medicine, David Geffen School of Medicine (DGSOM), University of California, Los Angeles (UCLA), Los Angeles, California. aribas@mednet.ucla.edu cpuigsaus@mednet.ucla.edu.
This study shows that combining genetically modified hematopoietic stem cells (HSCs) and T cells engineered with a specific T-cell receptor (TCR) is safe in preclinical models. This approach aims to improve T-cell persistence and durable clinical responses for cancer therapy.
Area of Science:
- Immunotherapy
- Hematopoietic Stem Cell Transplantation
- Gene Therapy
Background:
- Adoptive cell transfer of T-cell receptor (TCR)-engineered T cells shows promise for durable clinical responses.
- Improving the persistence of these engineered T cells is crucial for sustained therapeutic effects.
Purpose of the Study:
- To conduct preclinical studies for an Investigational New Drug (IND) application.
- To evaluate the safety and efficacy of co-transplanting genetically modified hematopoietic stem cells (HSCs) and T cells engineered with an NY-ESO-1 TCR.
Main Methods:
- HSCs and T cells were genetically modified to express an NY-ESO-1 TCR and a reporter/suicide gene (HSV1-sr39TK) in HSCs.
- Co-administration of modified HSCs and T cells was performed in myelodepleted mice under Good Laboratory Practice (GLP) conditions.
- Safety, persistence, HSC differentiation, transgene immunogenicity, viral insertion, and Good Manufacturing Practice (GMP) cell production were assessed.
Main Results:
- Genetically modified HSCs differentiated into all blood lineages in vivo post-transplantation.
- Coadministration of modified HSCs and T cells did not increase toxicity.
- No detrimental effects on HSC differentiation or evidence of genotoxicity were observed; GMP batches showed adequate stability and functionality.
Conclusions:
- Coadministration of HSCs and T cells engineered with an NY-ESO-1 TCR is safe in preclinical models.
- These findings supported the FDA approval of IND 17471, paving the way for clinical trials.
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