Development of a plasma maltose assay method as a screening test for upper gastrointestinal disorders

Tetsuya Komene, Kotoko Kai, Kiyoko Kinpara, Tomoaki Sato, Eisaku Hokazono, Tatsuo Shimosawa, Susumu Osawa, Masanori Seimiya

研究成果: ジャーナルへの寄稿学術誌査読

抄録

Background and objective: The disaccharide loading test is a method to assess gastric mucosal damage. Since Trelan-G75, which is used for the sugar tolerance test, contains disaccharide maltose, if maltose is detected at a high sensitivity in the sample blood used in the sugar tolerance test, screening for upper gastrointestinal mucosal damage can be made simultaneously with the sugar tolerance test for the diagnosis of diabetes. Methods: Glucose-6-phosphate is generated by treating maltose with maltose phosphorylase, β-phosphoglucomutase, and glucose-1,6-bisphosphate. Then, change in the absorbance at 405 nm is measured by the enzymatic cycling method using Thio-NADP, β-NADPH, and Glucose-6-phosphate dehydrogenase. After evaluating the optimal condition for this method, it is mounted on an automatic biochemical analyzer, and samples after the sugar tolerance test were assayed. Results: Regarding the performance of this method, the repeatability was 10–50 μmol/L with a CV of ≤1.1%. Concerning the assay range, a curve passing the origin with a range of linearity up to 120 μmol/L was obtained. No effect of dyes or sugars in the blood was noted. As a result of application to patients with gastric mucosal disorders (those who had a health checkup), significant differences were observed depending on the stage of atrophic gastritis. Discussion: This method has a high sensitivity and a high precision and can be used for high-speed analysis on an automatic analyzer. It has the potential to be used as a screening test for gastric mucosal damage.

本文言語英語
ページ(範囲)303-308
ページ数6
ジャーナルAnnals of Clinical Biochemistry
61
4
DOI
出版ステータス出版済み - 7月 2024

!!!All Science Journal Classification (ASJC) codes

  • 臨床生化学

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