Association between gastric myoelectrical activity and intraluminal nitric oxide.
BACKGROUND
We have previously shown that the intraluminal concentration of NO in H. pylori-positive patients is significantly reduced compared to that in H. pylori-negative patients.


OBJECTIVE
The aim of this study was to evaluate the effect of H. pylori infection on gastric motor activity in relation to the level of NO and nitrite in the stomach in humans.


METHODS
Thirty-two H. pylori-negative and 32 H. pylori-positive patients with dyspepsia were studied. Gastric myoelectrical activity was recorded for 24 h using surface electrogastrography. Intraluminal gas and juice were endoscopically collected from the stomach to determine NO and nitrite and nitrate (NOx) levels using a chemiluminescence system.


RESULTS
The percentage of tachygastria in the morning preprandial state was significantly higher (P = 0.005) in H. pylori-positive than -negative patients. In H. pylori-negative patients, there was a significant positive correlation between NO levels and the percentage of bradygastria (r = 0.56, P = 0.001) and a significant negative correlation between NOx levels and the percentage of normal electrical activity (r = - 0.57, P=0.001) in the preprandial state.


CONCLUSIONS
Gastric motor activity is associated with NO and NOx levels in the gastric lumen. H. pylori infection may play a role in the pathogenesis of abnormal gastric myoelectrical activity.
Shiotani
A
A
Health Administration Center, Wakayama Medical University, Japan. shiotani@centre.wakayama-u.ac.jp
Iguchi
M
M
Inoue
I
I
Magari
H
H
Yanaoka
K
K
Tamai
H
H
Kitauchi
S
S
Ichinose
M
M
D000293:Adolescent; D000328:Adult; D000368:Aged; D004415:Dyspepsia / Q000150:complications / Q000378:metabolism* / Q000382:microbiology / Q000503:physiopathology; D004576:Electromyography; D016099:Endoscopy, Gastrointestinal; D005260:Female; D005746:Gastric Emptying / Q000502:physiology; D005750:Gastric Juice / Q000737:chemistry; D005753:Gastric Mucosa / Q000378:metabolism*; D016481:Helicobacter Infections / Q000150:complications / Q000378:metabolism* / Q000382:microbiology / Q000503:physiopathology; D016480:Helicobacter pylori / Q000302:isolation & purification; D006801:Humans; D008297:Male; D008875:Middle Aged; D009569:Nitric Oxide / Q000096:biosynthesis*; D009573:Nitrites / Q000378:metabolism; D019518:Postprandial Period
D009573:Nitrites; D009569:Nitric Oxide