Gut microbiome-mediated monocytes promote liver metastasis

  • Int Immunopharmacol. 2024 May 30:133:111877. doi: 10.1016/j.intimp.2024.111877.
Wenzhong Zhang  1 ,  Jie Ling  1 ,  Baiying Xu  1 ,  Jie Wang  1 ,  Zexu Chen  1 ,  Gang Li  2
Affiliations
  • 1. Department of General Surgery, Shanghai Pudong New Area People's Hospital, Shanghai 201200, China.
  • 2. Department of General Surgery, Shanghai Pudong New Area People's Hospital, Shanghai 201200, China. Electronic address: [email protected].
PMID: 38608440 DOI: 10.1016/j.intimp.2024.111877
Abstract

The gut microbiome plays an important role in tumor growth by regulating immune cell function. However, the role of the gut microbiome-mediated monocytes in liver metastasis remains unclear. In this study, we found that fecal microbiome transplantation (FMT) from the stool of patients with liver metastasis (LM) significantly promoted liver metastasis compared with healthy donors (HD). Monocytes were upregulated in liver tissues by the CCL2/CCR2 axis in LM patients' stool transplanted mouse model. CCL2/CCR2 inhibition and monocyte depletion significantly suppress liver metastasis. FMT using LM patients' stool enhanced the plasma lipopolysaccharides (LPS) concentration. The LPS/TLR4 signaling pathway is crucial for gut microbiome-mediated liver metastasis. These results indicated that monocytes contribute to liver metastasis via the CCL2/CCR2 axis.

Keywords
CCL2/CCR2; Gut microbiome; LPS/TLR4; Liver metastasis; Monocytes.
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