γδ T Cell-Based Adoptive Cell Therapies Against Solid Epithelial Tumors

Conventionally, adoptive cell therapies have been developed and optimized using alpha beta T cells. However, the understudied and less abundant gamma delta T cells offer unique advantages to the immunotherapy field especially for therapies against solid tumors. Recently. gamma delta T-cell potential against a broad spectrum of malignant cells has been demonstrated in the preclinical setting. In the clinic, gamma delta T-cell-based inummotherapies have proven to be safe; however, their efficacy needs improvement. Considering the gaming body of literature reflecting the increasing interest in gamma delta T cells, we sought to capture the current topics of discussion in the field, pertaining to their use in adoptive immunotherapy. We aimed to compile information about gamma delta T-cell enhancement in terms of expansion, phenotype, and inhibitory receptors, in addition to the latest advances in preclinical and clinical research using gamma delta T cells specifically against solid epithelial tumors.