Fusobacterium Nucleatum Promotes Colorectal Cancer Through Neogenesis of Tumor Stem Cells

Overview

Journal J Clin Invest

Specialty General Medicine

Date 2024 Dec 10

PMID 39656543

Authors

Qinying Wang

Tingting Hu

Qinyuan Zhang

Yichi Zhang

Xiaoxu Dong

Yutao Jin

Jinming Li

Yangyang Guo

Fanying Guo

Ziying Chen

Peijie Zhong

Yongzhi Yang

Yanlei Ma

Affiliations

Soon will be listed here.

Abstract

Intestinal stem cells are crucial for maintaining intestinal homeostasis, yet their transformation into tumor stem cells in the context of microbial infection remains poorly understood. Fusobacterium nucleatum is frequently associated with the onset and progression of colorectal cancer (CRC). In this study, we uncovered that F. nucleatum colonized the depths of gut crypts in both patients with CRC and mouse models. Through single-cell sequencing analysis, we demonstrated that F. nucleatum infection reprogrammed crypt cells and activated lymphocyte antigen 6 complex, locus A+ ( LY6A+, also known as stem cell antigen 1 [Sca-1]) revival stem cells (RSCs), promoting their hyperproliferation and subsequent transformation into tumor stem cells, which accelerated intestinal carcinogenesis. Mechanistically, we identified LY6A as a glycosylphosphatidylinositol-anchored (GPI-anchored) membrane receptor for F. nucleatum. Upon binding, F. nucleatum induced the upregulation of ribosomal protein S14 (RPS14) via the LY6A receptor, driving RSC hyperactivity and tumorigenic conversion. Functional studies showed that genetic ablation of Ly6a in intestinal epithelial cells or Rps14 in LY6A+ RSCs substantially reduced F. nucleatum colonization and tumorigenesis. Moreover, analysis of clinical CRC cohorts revealed a strong correlation between F. nucleatum infection, RSC expansion, and elevated RPS14 expression in tumor tissues. These findings highlight an alternative F. nucleatum/LY6A/RPS14 signaling axis as a critical driver of CRC progression and propose potential therapeutic targets for effective CRC intervention.

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