Background: Pancreatic ductal adenocarcinoma’s (PDAC) growing incidence has been linked to the rise in obesity and type 2 diabetes mellitus. In previous work we have shown that metformin can prevent the increased incidence of PDAC in a KrasG12D mouse model subjected to a diet high in fat and calories (HFCD). One potential way that metformin can affect the host is through alterations in the gut microbiome. Therefore, we investigated microbial associations with PDAC development and metformin use in the same mouse model. Methods: LSL-KrasG12D/+; p48-Cre (KC) mice were given control diet (CD), HFCD, or HFCD with 5 mg/ml metformin in drinking water for 3 months. 16S rRNA sequencing was performed at the end of the 3 months to characterize microbiome composition of duodenal mucosal, duodenal luminal, and cecal luminal samples.
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