The intestinal microbiota and cellular therapy: implications for impact and mechanisms

Area of Science:

• Microbiology
• Immunology
• Oncology

Background:

• The human microbiota, a complex ecosystem of microorganisms, plays a crucial role in modulating host health and immune responses.
• Microbiota-derived metabolites are increasingly recognized for their influence on immune cell functions.
• Understanding the interplay between the microbiota and the host immune system is vital for advancing medical treatments.

Purpose of the Study:

• To review the intricate relationship between the human microbiota and the clinical efficacy of immune cell-based cancer therapies.
• To examine the impact of microbiota on hematopoietic cell transplantation and chimeric antigen receptor T-cell (CAR T-cell) therapy outcomes.
• To explore potential mechanisms and interventional strategies involving the microbiota in cellular therapy.

Main Methods:

• Comprehensive literature review of studies investigating the microbiota's role in cellular therapies.
• Analysis of mechanisms linking microbial composition and function to immune cell activity.
• Synthesis of current knowledge on microbiota interventions in cancer treatment.

Main Results:

• Evidence suggests a significant association between microbiota composition and patient responses to cellular therapies.
• Specific microbial metabolites and species may enhance or impair the efficacy of treatments like CAR T-cell therapy.
• The gut microbiota, in particular, appears to be a critical factor influencing treatment success.

Conclusions:

• The human microbiota is a key determinant of clinical outcomes in cellular cancer therapies.
• Modulating the microbiota presents a promising avenue for improving the effectiveness of treatments such as hematopoietic cell transplantation and CAR T-cell therapy.
• Further research is warranted to elucidate specific microbial targets and develop targeted interventions.