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seriously affects patients\u2019 physical and mental health. Several studies have shown that the gut microbiome is associated with FC, but these studies have produced inconsistent findings, with few reflecting the relationship between the gut microbiome and metabolites. This study used 16S rRNA microbial genomics and non-target metabolome based on liquid chromatography\u2013mass spectrometry to analyze the gut microbiota composition and serum metabolic profiles of 30 FC patients and 28 healthy individuals. We found that patients with FC and healthy individuals have different gut microbiota structures and serum metabolic profiles. FC patients had more Bacteroides and butyrate-producing bacteria (Roseburia, Faecaliberium, Butyriccoccus). The upstream products of host arginine biosynthesis (2-oxoglutaric acid, L-glutamic acid, N-acetylornithine, and L-ornithine) were significantly reduced in FC patients\u2019 serum metabolites. In summary, our study describes the gut microbiome and serum metabolome of patients with functional constipation. It reveals that functional constipation may be associated with increased Bacteroidetes and downregulation of upstream products of host arginine biosynthesis, which may be potential markers for diagnosing functional constipation.<\/jats:p>","DOI":"10.3390\/nu15071779","type":"journal-article","created":{"date-parts":[[2023,4,6]],"date-time":"2023-04-06T01:10:27Z","timestamp":1680743427000},"page":"1779","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":36,"title":["Characteristics of the Gut Microbiome and Serum Metabolome in Patients with Functional Constipation"],"prefix":"10.3390","volume":"15","author":[{"given":"Jialiang","family":"Wang","sequence":"first","affiliation":[{"name":"State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China"},{"name":"School of Food Science and Technology, Jiangnan University, Wuxi 214122, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Linlin","family":"Wang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China"},{"name":"School of Food Science and Technology, Jiangnan University, Wuxi 214122, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qiangqing","family":"Yu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China"},{"name":"School of Food Science and Technology, Jiangnan University, Wuxi 214122, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nan","family":"Tang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China"},{"name":"School of Food Science and Technology, Jiangnan University, Wuxi 214122, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chunxia","family":"Mei","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China"},{"name":"School of Food Science and Technology, Jiangnan University, Wuxi 214122, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hao","family":"Zhang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China"},{"name":"School of Food Science and Technology, Jiangnan University, Wuxi 214122, China"},{"name":"National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214122, China"},{"name":"(Yangzhou) Institute of Food Biotechnology, Jiangnan University, Yangzhou 225004, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gang","family":"Wang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China"},{"name":"School of Food Science and Technology, Jiangnan University, Wuxi 214122, China"},{"name":"(Yangzhou) Institute of Food Biotechnology, Jiangnan University, Yangzhou 225004, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jian","family":"Lu","sequence":"additional","affiliation":[{"name":"Department of Gastroenterology, Wuxi No. 2 People\u2019s Hospital (Jiangnan University Medical Center), Wuxi 214122, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei","family":"Chen","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China"},{"name":"School of Food Science and Technology, Jiangnan University, Wuxi 214122, China"},{"name":"National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214122, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,4,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"21","DOI":"10.1038\/s41575-019-0222-y","article-title":"Management of functional constipation in children and adults","volume":"17","author":"Vriesman","year":"2020","journal-title":"Nat. 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