title: Methylglyoxal induces systemic symptoms of irritable bowel syndrome.
abstract: Patients with irritable bowel syndrome (IBS) show a wide range of symptoms including diarrhea, abdominal pain, changes in bowel habits, nausea, vomiting, headache, anxiety, depression and cognitive impairment. Methylglyoxal has been proved to be a potential toxic metabolite produced by intestinal bacteria. The present study was aimed at investigating the correlation between methylglyoxal and irritable bowel syndrome. Rats were treated with an enema infusion of methylglyoxal. Fecal water content, visceral sensitivity, behavioral tests and serum 5-hydroxytryptamine (5-HT) were assessed after methylglyoxal exposure. Our data showed that fecal water content was significantly higher than controls after methylglyoxal exposure except that of 30 mM group. Threshold volumes on balloon distension decreased in the treatment groups. All exposed rats showed obvious head scratching and grooming behavior and a decrease in sucrose preference. The serum 5-HT values were increased in 30, 60, 90 mM groups and decreased in 150 mM group. Our findings suggested that methylglyoxal could induce diarrhea, visceral hypersensitivity, headache as well as depression-like behaviors in rats, and might be the key role in triggering systemic symptoms of IBS.
authors.affiliation: Department of Gastroenterology, First Affiliated Hospital of China Medical University, Shenyang, China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Department of Gastroenterology, First Affiliated Hospital of China Medical University, Shenyang, China.
authors.forename: Taiwei
authors.initials: T
authors.lastname: Jiao
authors.affiliation: Department of Cadre Ward II, First Affiliated Hospital of China Medical University, Shenyang, China.
authors.forename: Yushuai
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Department of Cadre Ward II, First Affiliated Hospital of China Medical University, Shenyang, China.
authors.forename: Nan
authors.initials: N
authors.lastname: Gao
authors.affiliation: Department of Cadre Ward II, First Affiliated Hospital of China Medical University, Shenyang, China.
authors.forename: Lili
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Department of Gastroenterology, First Affiliated Hospital of China Medical University, Shenyang, China.
authors.forename: Min
authors.initials: M
authors.lastname: Jiang
mesh_terms: D000818:Animals; D003967:Diarrhea / Q000097:blood / Q000139:chemically induced / Q000150:complications; D005243:Feces / Q000737:chemistry; D005260:Female; D006261:Headache / Q000097:blood / Q000139:chemically induced / Q000150:complications; D007422:Intestines / Q000187:drug effects / Q000382:microbiology; D043183:Irritable Bowel Syndrome / Q000097:blood / Q000139:chemically induced* / Q000150:complications / Q000382:microbiology; D011765:Pyruvaldehyde / Q000008:administration & dosage / Q000009:adverse effects*; D051381:Rats; D017208:Rats, Wistar; D012701:Serotonin / Q000097:blood
chemical_list: D012701:Serotonin; D011765:Pyruvaldehyde