Hepatoprotective effect of opioid peptides in stress
| Autor: | Alexey V. Solin, Tsygan Nv, Yury D. Lyashev |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Pharmacology
opioid peptides Chemistry hepatoprotectors RM1-950 liver Stress (mechanics) 03 medical and health sciences stress 0302 clinical medicine 030220 oncology & carcinogenesis liver resection 030211 gastroenterology & hepatology Pharmacology (medical) Therapeutics. Pharmacology Opioid peptide |
| Zdroj: | Research Results in Pharmacology 5(1): 77-96 Research Results in Pharmacology, Vol 5, Iss 1, Pp 77-96 (2019) |
| ISSN: | 2658-381X |
| DOI: | 10.3897/rrpharmacology.5.34472 |
| Popis: | Introduction: Influence of the endogenous opioid system on the liver has not been studied enough. To understand the damaging effects of stress on the liver and the hepatoprotective effects of opioids, a study was performed on stress-resistant and stress-susceptible animals. Materials and methods: The investigation was performed on 725 Wistar male-rats. Various types of stress were modeled: acute immobilization stress of various duration (3, 6 and 12 hours), chronic stress of limited mobility, swimming stress and traumatic stress (resection of 70% of the liver). Agonists of various types of opioid receptors in equimolar doses were injected to stressed animals at equimolar doses: DAGO – a mu-receptor agonist – at a dose of 6.3 mcg/kg, DSLET – a delta-receptor agonist – at a dose of 10 mcg/kg, and kappa receptor agonist dynorphin A (1-13) – at a dose of 20.1 mcg/kg. Results and discussion: The stress-limiting action of the studied opioids is characterized by the reduced hepatocyte dystrophy, microcirculation correction, a decreased concentration of lipid peroxidation metabolites, a suppressed cytolytic syndrome, a stimulated synthetic ability of the liver, and is more pronounced in stress- susceptible animals. The greatest stress-protective effect is shown after administering dynorphin A (1-13) in immobilization stress, and DAGO – in swimming stress. Dynorphin A (1-13) and DAGO manifested the most pronounced effect on the liver regeneration after resection. A preliminary stress simulation accelerates liver regeneration at the initial stage after resection. Conclusion: The hepatoprotective effect of opioids in stress depends on the typological peculiarities of animals. The results obtained offer a challenge of synthesizing new hepatoprotectors. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|