Effects of polysaccharides-riched Prunus mume fruit juice concentrate on uric acid excretion and gut microbiota in mice with adenine-induced chronic kidney disease

The present study aimed to determine the effects of polysaccharides-riched Prunus mume fruit juice concentrate (PFC) on uric acid (UA) excretion and the gut microbiota in mice with chronic kidney disease (CKD). C57BL/6 mice were randomly allocated to four groups: two that were fed AIN93M diet, one of which was administered 500 mg/kg PFC, and two that were fed AIN93M diet containing 0.2% adenine, one of which was administered 500 mg/kg PFC. PFC promoted UA excretion, which may have been mediated through increases in the protein expression of ATP-binding cassette transporter G2 (ABCG2), organic anion transporter 1 (OAT1), organic carnitine transporter 2 (OCTN2), and reductions in the protein expression of glucose transporter 9 (GLUT9) and urate transporter 1 (URAT1) in kidneys of CKD mice. ABCG2 expression in the intestine was also increased by PFC administration. Additionally, PFC significantly increased large intestinal short-chain fatty acids (SCFAs) concentrations, and the number of gut microbial species, and reduced the abundance of the genera Bacteroides, Pseudoflavonifractor, Helicobacter, Clostridium_IV and Allobaculum, which have a negative effect on UA excretion. In conclusion, PFC may promote UA excretion in CKD mice by altering the expression of urate transporters and regulating the gut microbiota.