Role of neuropeptides in the control of gastric secretion.
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Biomedical subjects
Publications and source records attributed to M E Kitler.
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The aim of this study was to assess the effects of a newly synthesized flavonoid, meciadanol, on gastric secretion and on aspirin-induced gastric mucosal injury in healthy humans. In vitro experiments have shown that meciadanol (INN proposed) inhibits histidine decarboxylase in gastric cells. In our study meciadanol did not affect either basal or pentagastrin-stimulated gastric acid secretion or pepsin secretion and did not produce any endoscopic or histological changes in the stomach or duodenum. Meciadanol prevented aspirin-induced microbleeding and aspirin-induced DNA loss, suggesting that gastric mucosal histamine is involved in the mucosal injury caused by aspirin.
Dichloromethylene diphosphonate (clodronate), a new compound, has powerful activity against osteoclasts and has been used successfully to treat hypercalcemia associated with cancer. We studied its effects on calcium balance in patients with malignant osteolytic lesions. Ten normocalcemic patients with advanced metastatic bone disease or myeloma were evaluated in a baseline 20-day balance and calcium kinetic study. They were then randomized to a clodronate or placebo regimen, treated intravenously for two weeks and orally for a month, and finally reevaluated in another 20-day balance and kinetic study, conducted while they were still receiving treatment. The results show that both calcium balance and calcium absorption increased from base line in the clodronate group and that these changes were significantly different from those in the placebo group (mean change [+/- S.D.] in calcium balance [clodronate vs. placebo], 203.8 +/- 140.1 vs. -65.2 +/- 98.8 mg [5.1 +/- 3.5 vs. -1.6 +/- 2.5 mmol] of calcium per day, P less than 0.01; change in calcium absorption, 158.8 +/- 158 vs. -38.2 +/- 96.0 mg [4.0 +/- 4.0 vs. -1.0 +/- 2.4 mmol] per day, P less than 0.05). There was a marginal decrease in bone resorption in the clodronate group and no change in bone accretion. Our results suggest that clodronate may be a useful adjuvant in managing metastatic bone disease.
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