MIF Deficiency Modulates Gut Microbiota Composition and Promotes Colitis-Associated Colorectal Cancer in a Murine...

Area of Science:

• Microbiology
• Immunology
• Oncology

Background:

• Intestinal dysbiosis is linked to inflammatory bowel disease and colorectal cancer.
• Macrophage migration inhibitory factor (MIF) is a proinflammatory cytokine implicated in inflammation and cancer progression.

Purpose of the Study:

• To investigate the role of MIF in gut microbiota alterations during colitis-associated colorectal cancer (CAC).
• To understand how MIF deficiency impacts microbial composition and cancer severity.

Main Methods:

• 16S rRNA gene sequencing to analyze fecal microbiota in wild-type (WT) and MIF-knockout (MIF-KO) mice during AOM/DSS-induced CAC.
• Fecal microbiota transplantation (FMT) experiments to assess the impact of MIF-deficient microbiota on tumor development.

Main Results:

• CAC induction caused significant microbial shifts in both WT and MIF-KO mice.
• MIF-KO mice with CAC exhibited more severe disease than WT CAC mice.
• Fecal microbiota from MIF-KO donors increased tumor burden in WT recipients.

Conclusions:

• MIF deficiency is associated with gut microbiota remodeling during CAC.
• MIF influences colorectal cancer severity through its impact on the host's microbial community.