The study of absorption of monosaccharides in the isolated intestine and resistance of the myocardium to ischemia-reperfusion in rats after administration of antimicrobial agents
Aim: we aimed to study the effect of the mixture of three broad-spectrum antimicrobials (amoxicillin, metronidazole, clarithromycin, AMC) on monosaccharide absorption in the isolated intestinal loop and on myocardial tolerance to ischemia-reperfusion injury (IRI). Materials and Methods: experiments were performed on adult male Wistar rats housed in conventional area. Glucose and fructose absorption was studied in the model of in situ isolated intestinal loop according to Thiry-Vella after administration of AMC into the intestinal lumen. Isolated heart studies were done using modified Landendorff setup after oral treatment of the animals with AMC. Results: AMC significantly inhibited glucose absorption in the isolated intestinal loop, mainly due to pronounced reduction of active, sodium-dependent glucose cotransporter 1-mediated transport. AMC also caused inhibition of fructose absorption. The animals treated with AMC showed decreased systolic pressure in the left ventricle up to 20% upon reperfusion, decreased pressure in the left ventricle during global ischemia (by 33-500%), increased coronary flow by 28-82%, and also insignificant trend to greater infarct size. Conclusion: AMC-induced inhibition of glucose and fructose absorption provides evidence for the existence of rapid changes in nutrient absorption, mainly due to inhibition of active transport. AMC treatment also resulted in deterioration of morphological and functional parameters of the isolated heart. The data obtained warrant further studies on the antibiotic-induced associated changes in enterocytes and cardiomyocytes.