How Cell and Gene Therapies Are Addressing Immune Rejection
Researchers are utilising vector engineering, transgene optimisation, and immunosuppressive drugs to address immunogenicity challenges in cell and gene therapies with advancements like CRISPR-Cas9.
FREMONT CA: Cell and gene therapies, once regarded as experimental, have now emerged as pivotal advancements in modern medicine, offering the potential for cures across a broad spectrum of diseases. However, immunogenicity remains a crucial obstacle to their broader implementation—the immune system's reaction to foreign substances.
Key factors contributing to immunogenicity in gene therapy are complex and multifaceted. Viral vectors, commonly used to deliver genetic material into cells, are efficient but can elicit immune responses, potentially reducing therapeutic efficacy. Additionally, transgene expression may trigger an immune reaction if the therapeutic gene product is recognised as foreign, destroying cells expressing the gene. Patient-specific factors, such as pre-existing immunity to viral vectors or transgene products, also significantly determine the likelihood of an immune response.
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To mitigate immunogenicity, researchers are employing several strategies. Vector engineering focuses on developing less immunogenic viral vectors, such as self-inactivating lentiviruses and adeno-associated viruses, designed to minimise immune activation. Transgene optimisation, including codon modification or tissue-specific promoters, helps reduce immune recognition.
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