Xinyu Cheng,Yifan Lei,Shuyang Zhang,Liping Chen,Yongzhong Wang
Hyperuricemia (HUA), a metabolic disorder resulting from disrupted uric acid (UA) homeostasis, is the principal etiological factor for gout. This study investigated the therapeutic potential of gut microbiota modulation in HUA using antibiotic-treated mouse models with butyrate intervention. Selective antibiotic screening identified the Dubosiella-type strain Dubosiella newyorkensis (Dn) as an effective intervention for HUA. Dn treatment significantly reduced UA production, improved renal function markers, and decreased oxidative stress. Dn enriches Bacteroides and Romboutsia while suppressing the pathobiont Thomasclavelia, thereby enhancing the production of acetate, propionate, and butyrate. Molecular analyses demonstrated that Dn downregulated the expression of URAT1 while upregulating ABCG2, thereby promoting UA excretion. Histopathological evaluation confirmed that Dn restored the glomerular atrophy, tubular dilation, and collagen deposition induced by HUA. These findings suggest that Dn is a promising multitarget therapeutic agent for HUA and provides a scientific foundation for the development of novel microbiome-based strategies against HUA.
Hawthorn fruit is rich in pectins; however, the gut microbiota-modulating effects of hawthorn pectin remain unclear. In this study, enzyme-extracted hawthorn pectin ( M w : 126.24 kDa; HG/RG-I ratio: 55.64 %/37.93 %; branching degree: 2.44) was fractionated into two components: D1 (spherical, 345.76 kDa, HG/RG-I 57.48 %/37.25 %, branching degree 2.16) and D2 (flexible, 17.20 kDa, HG/RG-I 78.24 %/21.76 %, branching degree 1.33). Hawthorn pectin directly stimulated Dubosiella newyorkensis and Bifidobacterium bifidum growth in vitro . In hyperlipidemic mice, it alleviated dyslipidemia and enriched Lactobacillus and Dubosiella . Parallel experiments confirmed that D. newyorkensis supplementation similarly reduced dyslipidemia and enhanced Lactobacillus abundance, mediated by bacterial acetate production. Only D1 mimicked the pectin's prebiotic activity, promoting D. newyorkensis and B. bifidum growth. The high-RG-I D1, with elevated branching and larger M w , was identified as the key driver of hawthorn pectin's prebiotic effect. These findings highlight that hawthorn pectin and D1 specifically target probiotic D. newyorkensis to synergize with Lactobacillus against hyperlipidemia.
危险品化学品经营许可证（带存储）