ArticleDiabetes, metabolic syndrome and obesity : targets and therapy2025
Characterization of Vitreous Microbiota Dysbiosis Associated with Proliferative Diabetic Retinopathy.
Article in Diabetes, metabolic syndrome and obesity : targets and therapy, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Purpose: Emerging evidence suggests an association between ocular microbiota dysbiosis and ophthalmic diseases; however, the role of the posterior segment microbiome in diabetic retinopathy (DR) remains poorly characterized. In this study, we characterized the vitreous microbiome of patients with proliferative diabetic retinopathy (PDR) and systematically compared its microbial community structure with that of healthy controls. Methods: A cohort of 19 PDR patients with type 2 diabetes mellitus and 19 non-DR controls were enrolled, with vitreous samples obtained through vitrectomy. Vitreous microbial composition was characterized using 2bRAD-M sequencing technology, enabling species-level taxonomic resolution. The comparison of dominant taxa, biomarker analysis and metabolic pathway differences between the two groups were further explored. Results: The results of microbiome profiling revealed significant compositional differences in the vitreous core microbiome of PDR patients compared to controls, potentially associated with enhanced activity in membrane transport, nucleotide metabolism and carbohydrate metabolism pathways. LEfSe analysis identified 536 distinctive biomarkers of the two groups. At species level, the PDR group had significantly lower relative abundances of CAG-485_sp009775375, Akkermansia_muciniphila and Bacteroides_acidifaciens, compared with control group. Conclusion: This is the first study confirming the microbiota in human vitreous fluid samples by 2bRAD-M sequencing. These findings suggest a potential link between vitreous microbial dysbiosis and PDR, offering novel insights for future mechanistic investigations into DR.
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