{"title":"Fecal fatty acid-linked bile acid profiles in pediatric patients with ulcerative colitis","authors":"Hiromi Suzuki , Mitsuyoshi Suzuki , Keisuke Jimbo , Musashi Hibio , Takahiro Sasaki , Tsuyoshi Murai , Yukiko Yamashita , Mizuho Une , Shojiro Ogawa , Toru Okamoto , Seiko Narushima , Wataru Suda , Genta Kakiyama , Taka-aki Matsuyama , Hajime Takei , Hiroshi Nittono","doi":"10.1016/j.cca.2024.120060","DOIUrl":null,"url":null,"abstract":"<div><h3>Objective</h3><div>Effect of gut dysbiosis on fatty acid (FA) linked 3β-hydroxy-bile acid esters (FA-isoBAs) formation is currently unknown. This study aimed to investigate the profile of FA-isoBAs in fecal samples from pediatric patients with ulcerative colitis (UC).</div></div><div><h3>Methods</h3><div>Fecal samples were collected from seven pediatric patients diagnosed with UC and seven age-matched healthy controls. Liquid chromatography-tandem mass spectrometry (LC/MS) method was set up for quantifications of thirteen different FA-isoBAs, including three new FA-isoBAs which had never been characterized. Method validation tests were performed with optimization of sample preparation. Statistical analyses were conducted to compare FA-isoBA concentrations between UC patients and healthy controls.</div></div><div><h3>Results</h3><div>The LC/MS method had sufficient linearity (r > 0.998), with the low detection limit (0.03–2.82 nmol/g stool), and limits of quantification (0.10–9.40 nmol/g stool) for all FA-isoBAs. The total FA-isoBAs concentration in UC patients was significantly lower than healthy controls, regardless of the degree of the disease severity. The UC subjects had markedly increased primary bile acid (BA) levels with decreased secondary BAs. Propionic acid-linked isoBA and stearic acid-linked 12-oxo-isolithocholic acid were newly identified from healthy subjects but they were not present in UC subjects. In agreement with the previous report, composition of long-chain (C16-C18) FA-linked BAs dominated over short-chain FA-linked BAs both in healthy and disease subjects.</div></div><div><h3>Conclusion</h3><div>The present study reported the fecal FA-isoBA profiles in pediatric UC patients for the first time. The results open the door to the new field that investigates the role of these microbial-driven BAs in gastrointestinal health.</div></div>","PeriodicalId":10205,"journal":{"name":"Clinica Chimica Acta","volume":"566 ","pages":"Article 120060"},"PeriodicalIF":3.2000,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Clinica Chimica Acta","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0009898124023131","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MEDICAL LABORATORY TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Objective
Effect of gut dysbiosis on fatty acid (FA) linked 3β-hydroxy-bile acid esters (FA-isoBAs) formation is currently unknown. This study aimed to investigate the profile of FA-isoBAs in fecal samples from pediatric patients with ulcerative colitis (UC).
Methods
Fecal samples were collected from seven pediatric patients diagnosed with UC and seven age-matched healthy controls. Liquid chromatography-tandem mass spectrometry (LC/MS) method was set up for quantifications of thirteen different FA-isoBAs, including three new FA-isoBAs which had never been characterized. Method validation tests were performed with optimization of sample preparation. Statistical analyses were conducted to compare FA-isoBA concentrations between UC patients and healthy controls.
Results
The LC/MS method had sufficient linearity (r > 0.998), with the low detection limit (0.03–2.82 nmol/g stool), and limits of quantification (0.10–9.40 nmol/g stool) for all FA-isoBAs. The total FA-isoBAs concentration in UC patients was significantly lower than healthy controls, regardless of the degree of the disease severity. The UC subjects had markedly increased primary bile acid (BA) levels with decreased secondary BAs. Propionic acid-linked isoBA and stearic acid-linked 12-oxo-isolithocholic acid were newly identified from healthy subjects but they were not present in UC subjects. In agreement with the previous report, composition of long-chain (C16-C18) FA-linked BAs dominated over short-chain FA-linked BAs both in healthy and disease subjects.
Conclusion
The present study reported the fecal FA-isoBA profiles in pediatric UC patients for the first time. The results open the door to the new field that investigates the role of these microbial-driven BAs in gastrointestinal health.
期刊介绍:
The Official Journal of the International Federation of Clinical Chemistry and Laboratory Medicine (IFCC)
Clinica Chimica Acta is a high-quality journal which publishes original Research Communications in the field of clinical chemistry and laboratory medicine, defined as the diagnostic application of chemistry, biochemistry, immunochemistry, biochemical aspects of hematology, toxicology, and molecular biology to the study of human disease in body fluids and cells.
The objective of the journal is to publish novel information leading to a better understanding of biological mechanisms of human diseases, their prevention, diagnosis, and patient management. Reports of an applied clinical character are also welcome. Papers concerned with normal metabolic processes or with constituents of normal cells or body fluids, such as reports of experimental or clinical studies in animals, are only considered when they are clearly and directly relevant to human disease. Evaluation of commercial products have a low priority for publication, unless they are novel or represent a technological breakthrough. Studies dealing with effects of drugs and natural products and studies dealing with the redox status in various diseases are not within the journal''s scope. Development and evaluation of novel analytical methodologies where applicable to diagnostic clinical chemistry and laboratory medicine, including point-of-care testing, and topics on laboratory management and informatics will also be considered. Studies focused on emerging diagnostic technologies and (big) data analysis procedures including digitalization, mobile Health, and artificial Intelligence applied to Laboratory Medicine are also of interest.