enkephalin-leu--ala(2)-arg(6)- and Body-Weight

We studied the possibility of correction of the negative effects of antenatal hypoxia on the liver tissue homeostasis in 7-day-old albino rats by administration of opioid peptides in a dose of 100 μg/kg on postnatal days 2-6. Administration of mixed μ/δ-opioid receptor agonist Dalargin neutralized deviations of gravimetric indicators, parameters of proliferative activity, and activity of the nucleolar apparatus of hepatocytes. Administration of the non-opiate Leu-enkephalin analogue did not normalize gravimetric parameters and nucleolar apparatus parameters, however, it significantly increased the pool of proliferating hepatocytes. Both peptides significantly reduced the intensity of free radical oxidation, improved antioxidant antiradical defense and resistance to peroxidation in the liver tissue of animals subjected to antenatal hypoxia.

Topics: Animals; Animals, Newborn; Antioxidants; Body Weight; Cell Nucleus; Enkephalin, Leucine-2-Alanine; Female; Free Radicals; Hepatocytes; Homeostasis; Hypoxia; Liver; Opioid Peptides; Organ Size; Oxidative Stress; Rats; Rats, Wistar