Intratumoral Microbiome: Impact on Cancer Progression and Cellular Immunotherapy.

Area of Science:

• Oncology
• Microbiology
• Immunology

Background:

• The intratumoral microbiota, including bacteria, fungi, and viruses, resides within the tumor microenvironment.
• This microbiome plays a significant role in carcinogenesis through various mechanisms.

Purpose of the Study:

• To explore the mechanisms by which the intratumoral microbiota influences carcinogenesis.
• To investigate the complex interplay between the tumor microbiome and the host immune system.
• To highlight the importance of microbiome composition in cancer immunotherapy outcomes.

Main Methods:

• Review of existing literature on intratumoral microbiota and cancer.
• Analysis of microbial mechanisms affecting host DNA damage, oncogenic signaling pathways (WNT-β-catenin, NF-κB, PI3K), and inflammation.
• Examination of the bidirectional relationship between the microbiome and immune cells (T cells, NK cells, TAMs).

Main Results:

• Microbes can promote tumor growth by suppressing anti-tumor immunity or by producing metabolites that enhance anti-tumor responses.
• Microbial components can act as neoantigens, stimulating immune recognition.
• Microbiome composition is a critical determinant of immunotherapy efficacy.

Conclusions:

• Future cancer immunotherapy research should focus on mechanistic studies using multi-omics approaches.
• Clinical trials are needed to validate microbial biomarkers.
• Development of microbiome-targeted therapies is essential to enhance anti-tumor immunity.