Overlap of symptoms of dyspepsia and gastroesophageal reflux in the community.

Background/aims: Dyspepsia and gastroesophageal reflux disease are common chronic diseases. In the clinical setting, some patients express both problems together; however, little is known about the real prevalence of the presence of the two symptoms. Turkey is particularly interesting because of differences observed from developed countries.

Gastroesophageal reflux disease in a low-income region in Turkey.

Objectives: Detailed population-based data regarding the prevalence and symptom profile of gastroesophageal reflux disease (GERD) in underdeveloped and developing Caucasian countries are lacking. The aim of this study was to determine the prevalence and clinical spectrum of GERD in a low-income region in Turkey.

Methods: We used a previously validated reflux questionnaire, which was translated into Turkish and culturally adapted.

Chloride transport in rabbit esophageal epithelial cells.

We investigated Cl(-) transport pathways in the apical and basolateral membranes of rabbit esophageal epithelial cells (EEC) using conventional and ion-selective microelectrodes. Intact sections of esophageal epithelium were mounted serosal or luminal side up in a modified Ussing chamber, where transepithelial potential difference and transepithelial resistance could be determined. Microelectrodes were used to measure intracellular Cl(-) activity (a), basolateral or apical membrane potentials (V(mBL) or V(mC)), and the voltage divider ratio.

The role of pepsin in acid injury to esophageal epithelium.

Objectives: The development of reflux esophagitis in humans is a process resulting from esophageal exposure to refluxed gastric contents. There is no doubt that damage to the esophageal epithelium requires exposure to gastric acid; however, the role of refluxed pepsin as contributor to this damage seems to be underappreciated.

Methods: The role of physiological concentrations of pepsin was examined in Ussing chambered rabbit esophageal epithelium and in cultured esophageal epithelial cells.

Effect of heat stress on rabbit esophageal epithelium.

Hot beverages expose the esophageal epithelium to temperatures as high as 58 degrees C. To study the impact of such temperatures, rabbit esophageal epithelium was exposed to luminal heat or both luminal and serosal heat while mounted in Ussing chambers. Luminal heat, mimicking exposure to hot beverages, reduced potential difference (PD) and resistance (R) when applied at >/=49 degrees C and reduced short-circuit current (Isc) at >/=60 degrees C.

Effect of ethanol on the structure and function of rabbit esophageal epithelium.

Epidemiological studies indicate a relationship between alcohol consumption and esophageal epithelial disease. We therefore sought the contribution of the direct effects of ethanol on esophageal epithelial structure and (transport and barrier) function. Epithelium from the rabbit was mounted in Ussing chambers and exposed luminally for 1 h to 1-40% ethanol.