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Proline supplementation mitigates the early stage of liver injury in bile duct ligated rats.

Abstract
Background Proline is a proteinogenic amino acid with multiple biological functions. Several investigations have been supposed that cellular proline accumulation is a stress response mechanism. This amino acid acts as an osmoregulator, scavenges free radical species, boosts cellular antioxidant defense mechanisms, protects mitochondria, and promotes energy production. The current study was designed to investigate the effect of proline treatment on the liver in bile duct ligated (BDL) rats as an animal model of cholestasis/cirrhosis. Methods BDL rats were supplemented with proline-containing drinking water (0.25% and 0.5% w:v), and samples were collected at scheduled time intervals (3, 7, 14, 28, and 42 days after BDL surgery). Results Drastic elevation in the serum level of liver injury biomarkers and significant tissue histopathological changes were evident in BDL rats. Markers of oxidative stress were also higher in the liver of BDL animals. It was found that proline supplementation attenuated BDL-induced alteration in serum biomarkers of liver injury, mitigated liver histopathological changes, and alleviated markers of oxidative stress at the early stage of BDL operation (3, 7, and 14 days after BDL surgery). Conclusions The hepatoprotection provided by proline in BDL animals might be associated with its ability to attenuate oxidative stress and its consequences.
AuthorsReza Heidari, Hamidreza Mohammadi, Vahid Ghanbarinejad, Asrin Ahmadi, Mohammad Mehdi Ommati, Hossein Niknahad, Akram Jamshidzadeh, Negar Azarpira, Narges Abdoli
JournalJournal of basic and clinical physiology and pharmacology (J Basic Clin Physiol Pharmacol) Vol. 30 Issue 1 Pg. 91-101 (Dec 19 2018) ISSN: 2191-0286 [Electronic] Germany
PMID30205645 (Publication Type: Journal Article)
Chemical References
  • Proline
Topics
  • Animals
  • Bile Ducts (drug effects, metabolism, pathology)
  • Dietary Supplements
  • Ligation (adverse effects)
  • Liver Cirrhosis, Biliary (drug therapy, metabolism, pathology)
  • Liver Failure, Acute (metabolism, pathology, prevention & control)
  • Male
  • Proline (pharmacology, therapeutic use)
  • Rats
  • Rats, Sprague-Dawley

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