Abstract
The gut microbiome plays a critical role in the development, progression, and treatment of cancer. As interest in microbiome-immune-cancer interactions expands, the prevalence of fecal microbial transplant (FMT) models has increased proportionally. However, current literature does not provide adequate details or consistent approaches to allow for necessary rigor and experimental reproducibility. In this review, we evaluate key studies using FMT to investigate the relationship between the gut microbiome and various types of cancer. In addition, we will discuss the common pitfalls of these experiments and methods for improved standardization and validation as the field uses FMT with greater frequency. Finally, this review focuses on the impacts of the gut and extraintestinal microbes, prebiotics, probiotics, and postbiotics in cancer risk and response to therapy across a variety of tumor types.NEW & NOTEWORTHY The microbiome impacts the onset, progression, and therapy response of certain types of cancer. Fecal microbial transplants (FMTs) are an increasingly prevalent tool to test these mechanisms that require standardization by the field.
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