M J Starlinger

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Rapid epithelial restitution is now considered one of the primary defense mechanisms of the stomach and duodenum. Because there is currently no evidence as to whether restitution occurs in human tissue, this study examined human and rabbit colonic mucosa after superficial injury and monitored the potential difference, alkaline flux, and speed and mechanisms(More)
Rapid epithelial restitution after superficial damage of the gastroduodenal mucosa consists of the migration of remaining intact epithelial cells beneath a necrotic layer of mucus and shed cells. Complete reepithelialization occurs within 60 min (rat stomach) to 7 h (rabbit duodenum) and does not involve cell division. The present study investigated rapid(More)
Omeprazole (10(-4) M) inhibited H+ secretion and increased potential difference (PD), resistance, and short-circuit current (Isc) in chambered bullfrog gastric mucosa, but the electrical changes developed only in tissues previously exposed to histamine. Net chloride transport (JnetCl) did not change after omeprazole under short-circuited conditions, and Isc(More)
The effects of parenteral aspirin (ASA) or sodium salicylate (SA) on the gastric mucosa were investigated in anesthetized pylorus-ligated rats 3 h after a bolus intravenous injection of ASA or SA, 150 mg/kg, or NaCl (control). Aspirin or SA produced similar extensive gross mucosal hemorrhagic lesions and similar microscopic damage in the presence of luminal(More)
312 of a total of 543 emergency endoscopies were carried out in patients with severe haemorrhage of the upper gastrointestinal tract. This was defined as a haemorrhage of such severity that at least 2 of the following 3 criteria were present: a shock index greater than 1, an erythrocyte count of less than 3 million/mm3, and a transfusion requirement of(More)
Epithelial repair after luminal acid exposure was studied in the rabbit duodenum in vivo and in vitro. Hydrochloric acid (200 mM, 30 min in vivo; 10 mM, 10 min in vitro) caused a uniform damage of the mucosa confined to the villi. After demarcation and detachment of the necrotic tissue the defect was bridged by the remaining viable epithelial cells,(More)
Recent research has shown adequate mucosal blood flow and blood bicarbonate availability to be crucial in the prevention of gastric ulceration, yet the relative importance of these two factors is unknown. We studied the incidence of ulceration in rats subjected to hypovolemic shock under varying conditions of blood flow and acid-base balance. At the start(More)
The role of alkaline secretion in the protection against acid-induced (50 mM HCl) damage was investigated in the perfused rabbit duodenum. Basal alkaline secretion was 3.86 +/- 0.23 mu Eq/cm2 . 10 min (pH-stat method). Perfusion with HCl increased alkaline secretion to 4.39 +/- 0.17 mu Eq/cm2 . 10 min and led to superficial damage of 51.8% of the villi.(More)
The effects of 20 mM aspirin (ASA), 20 mM sodium salicylate (SA), or 10(-4) M indomethacin placed in the nutrient solution (N) to stimulate systemic administration were investigated at pHN 7.3 in Ussing-chambered amphibian gastric mucosae. In histamine-stimulated tissues, the initial rise and subsequent rapid fall in potential difference, rise in(More)
The effect of barrier breakers on gastric mucosal blood flow (MBF) has been disputed, but the influence of acid back diffusion alone has never been studied. In anesthetized New Zealand white rabbits, intramural pH (pHi) and gastric MBF were measured with an antimony microelectrode and with radioactive microspheres (51Cr, 85Cr, 141Ce), respectively.(More)