4.6 Review

Intratumoral microbiome and gastrointestinal cancers

Journal

FRONTIERS IN ONCOLOGY
Volume 12, Issue -, Pages -

Publisher

FRONTIERS MEDIA SA
DOI: 10.3389/fonc.2022.1047015

Keywords

tumor microenvironment; intratumoral microbiome; gastrointestinal cancer; commensal microbiota; tumor metabolism

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Funding

  1. Key project of Science and Technology, Tianjin Municipal Science and Technology Bureau
  2. [19YFZCSY00020]

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The intratumoral microbiome, an important component of the tumor microenvironment, plays a role in promoting immune microenvironment heterogeneity and reprogramming tumor metabolism to affect tumor invasion and metastasis. Understanding the intratumoral microbiome in gastrointestinal cancers can reveal the mechanisms of tumor development and provide a basis for developing new therapeutic approaches.
Emerging studies have revealed the role of microbiota in regulating tumorigenesis, development, and response to antitumor treatment. However, most studies have focused on gut microbiota, and little is known about the intratumoral microbiome. To date, the latest research has indicated that the intratumoral microbiome is a key component of the tumor microenvironment (TME), and can promote a heterogeneous immune microenvironment, reprogram tumor metabolism to affect tumor invasion and metastasis. In this review, we will summarize existing studies on the intratumoral microbiome of gastrointestinal cancers and reveal their crosstalk. This will provide a better understanding of this emerging field and help to explore new therapeutic approaches for cancer patients by targeting the intratumoral microbiome.

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