期刊
CANCER LETTERS
卷 522, 期 -, 页码 63-79出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.canlet.2021.09.009
关键词
Tumor microenvironment; Microbiome; Therapeutic targets
类别
Live-pathogenic bacteria have been identified inside tumors for centuries and offer opportunities for metabolic engineering in various clinical fields. However, due to the low microbial biomass nature of tumors, characterizing the tumor microbiome remains a challenge.
Live-pathogenic bacteria, which were identified inside tumors hundreds year ago, are key elements in modern cancer research. As they have a relatively accessible genome, they offer a multitude of metabolic engineering opportunities, useful in several clinical fields. Better understanding of the tumor microenvironment and its associated microbiome would help conceptualize new metabolically engineered species, triggering efficient therapeutic responses against cancer. Unfortunately, given the low microbial biomass nature of tumors, char-acterizing the tumor microbiome remains a challenge. Tumors have a high host versus bacterial DNA ratio, making it extremely complex to identify tumor-associated bacteria. Nevertheless, with the improvements in next-generation analytic tools, recent studies demonstrated the existence of intratumor bacteria inside defined tumors. It is now proven that each cancer subtype has a unique microbiome, characterized by bacterial communities with specific metabolic functions. This review provides a brief overview of the main approaches used to characterize the tumor microbiome, and of the recently proposed functions of intracellular bacteria identified in oncological entities. The therapeutic aspects of live-pathogenic microbes are also discussed, regarding the tumor microen-vironment of each cancer type.
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