Abstract
Abstract
Background
Studies investigating the changes in short-chain fatty acids (SCFAs) in patients with ulcerative colitis (UC) have yielded inconsistent results. We performed a meta-analysis of studies that investigated the alterations in different SCFAs among UC patients to assess their role in the development of UC.
Methods
Three databases were searched for relevant studies published as of April 2021. Results are presented as standardized mean difference (SMD) with 95% confidence interval (95% CI).
Results
Eleven studies were included in the meta-analysis. Compared to healthy subjects, UC patients had significantly lower concentrations of total SCFAs (SMD = − 0.88, 95%CI − 1.44, − 0.33; P < 0.001), acetate (SMD = − 0.54, 95% CI − 0.91, − 0.17; P = 0.004), propionate, (SMD = − 0.37, 95% CI − 0.66, − 0.07; P = 0.016), and valerate (SMD = − 0.91, 95% CI − 1.45, − 0.38; P < 0.001). On subgroup analysis based on disease status, patients with active UC had reduced concentrations of acetate (SMD = − 1.83, 95% CI − 3.32, − 0.35; P = 0.015), propionate (SMD = − 2.51, 95% CI − 4.41, − 0.61; P = 0.009), and valerate (SMD = − 0.91, 95% CI − 1.45, − 0.38; P < 0.001), while UC patients in remission had similar concentrations with healthy subjects. Patients with active UC had lower butyrate level (SMD = − 2.09, 95% CI − 3.56, − 0.62; P = 0.005) while UC patients in remission had higher butyrate level (SMD = 0.71, 95% CI 0.33, 1.10; P < 0.001) compared with healthy subjects.
Conclusion
UC patients had significantly decreased concentrations of total SCFAs, acetate, propionate, and valerate compared with healthy subjects. In addition, inconsistent changes of certain special SCFAs were observed in UC patients with different disease status.
Funder
the National Natural Science Foundation of China
Guangdong Medical Science and Technology Research Fund
Guangzhou Planned Project of Science and Technology
Innovative Clinical Technique of Guangzhou
Publisher
Springer Science and Business Media LLC
Subject
Gastroenterology,General Medicine
Cited by
22 articles.
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