Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0017168 (gastroesophageal reflux disease)
 11,783 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The aim of this study was the assessment of citric acid cough threshold in patients with chronic cough due to GERD, confirmed by 24-hour esophageal pH- monitoring, with other reasons of chronic cough excluded. Thirty subjects with chronic cough due to GERD and 15 healthy volunteers underwent cough challenge with doubling concentrations of citric acid using Asthma Provocation System (Jaeger). The cough threshold was defined as the first concentration of citric acid that induced cough. Spirometric parameters (FEV, PEF and FVC) were measured before and 10 minutes after cough challenge in all groups. A day and night cough score diaries (verbal category descriptive score) were completed in all subjects. The cough threshold was significantly lower in GERD patients in comparison with healthy volunteers. In GERD patients the negative correlation was found between day cough score measurements and cough threshold. Citric acid cough challenge did not cause bronchoconstriction or any significant change of spirometric parameters.
 ...
PMID:[Assessment of cough threshold in patients with gastroesophageal reflux disease]. 1458 28

We investigated neuronal activity of the medulla oblongata during gastroesophageal reflux-related cough (GERC). A rat model of GERC was generated by perfusing HCl into lower esophagus and inducing cough with citric acid. The HCl group rat was received HCl perfusion without citric acid-induced cough. The saline control rat was perfused with saline instead and cough was induced. Citric acid-induced cough rat was only induced by citric acid. Blank group rats were fed normally. Fos expressions were observed in medulla oblongata nuclei using immunohistochemistry. Manganese-enhanced magnetic resonance imaging (MEMRI) was performed to detect the Mn(2+) signal following intraperitoneal injection of MnCl(2). HCl perfusion and citric acid-induced cough caused Fos expressions in the nucleus of solitary tract (nTS), dorsal motor nucleus of the vagus (DMV), paratrigeminal nucleus (Pa5), and intermediate reticular nucleus (IRt), which was higher than HCl group, saline control group, citric acid-induced cough group, and blank group. A high Mn(2+) signal was also observed in most of these nuclei in model rats, compared with blank group animals. The Mn(2+) signal was also higher in the HCl, saline and citric acid-induced cough group animals, compared with blank group animals. The study showed medulla oblongata neurons were excited in a HCl perfusion and citric acid-induced cough rat model, and nTS, DMV, Pa5 and IRt neurons maybe involved in the cough process and signal integrate.
 ...
PMID:Neuronal activity of the medulla oblongata revealed by manganese-enhanced magnetic resonance imaging in a rat model of gastroesophageal reflux-related cough. 3043 7