HISTOLOGY AND HISTOPATHOLOGY

From Cell Biology to Tissue Engineering

 

4-(3,4-dihydroxybenzoyloxymethyl)phenyl-O-β-D-glucopyranoside effect in liver regeneration

Tülin Firat1, Gizem Söyler2, Fatma Töre3, Mustafa Şit4, Aysu Kiyan5, Ufuk Özgen6 and Aysel Kükner2

1Department of Histology and Embryology, Faculty of Medicine, Abant Izzet Baysal University, Bolu, Turkey, 2Department of Histology and Embryology, Faculty of Medicine, Near East University, Nicosia, Cyprus, 3Department of Physiology, Faculty of Medicine, Biruni University, Istanbul, 4Department of Surgery, Faculty of Medicine, Abant Izzet Baysal University, 5Department of Public Health, Faculty of Medicine, Abant Izzet Baysal University, Bolu and 6Department of Pharmacognosy, Faculty of Pharmacy, Karadeniz Technical University, Trabzon, Turkey

Offprint requests to: Aysel Kükner, Department of Histology and Embryology, Faculty of Medicine, Near East University, Nicosia, Cyprus. e-mail: akukner@hotmail.com


Summary. Following an injury or resection, the mammalian liver has the capacity to regain its former volume and functioning by restoring itself. Studies have demonstrated that antioxidants play a role in hepatic regeneration. This study investigated the effect of 4-(3,4-dihydroxybenzoyloxymethyl)phenyl-O-β-D-glucopyra-noside (PG) obtained from Origanum micranthum on liver regeneration. Sixty Wistar Albino rats were used. In the sham-operated group, a midline abdominal laparotomy was performed without hepatectomy. In the partial hepatectomy (PHx) group, the median and left lateral lobes were removed. Rats in the PHx group received 20 mg/kg/day PG intraperitoneally before being sacrificed at 24, 48, and 72 hrs, and 7 days later. Liver tissues were collected for immunohistochemical analysis and electron microscopic evaluation. We found an increase in mitotic index, and the numbers of Ki-67 stained hepatocytes in all PHx early stage groups (24 hr, 48hr, 72 hr), but not in 7-day groups. The regeneration mediators eNOS, iNOS, TNF-α and NF-κB were shown to increase in PHx groups. This increase was more prominent dependening on time. In the PHx treatment (PHx+PG) groups, while eNOS was still high, iNOS, TNF-α and NF-κB had decreased. The apoptotic index was markedly high in the PHx groups; this was prevented by PG treatment. These findings were supported by the ultrastructural results. Our findings indicate that PG supports liver regeneration, hepatocyte proliferation, reduced liver damage, and inflammatory mediators following PHx. Histol Histopathol 34, 431-443 (2019)

Key words: Partial hepatectomy, Liver regeneration, Origanum micranthum

DOI: 10.14670/HH-18-056