Abstract
The present study investigated the effect of rutin, a natural flavonoid, on the expression of caspase activation recruitment domain (CARD) and pyrin domain (PYD) of apoptosis-associated speck-like protein (ASC), a mediator of inflammation, in the pancreas of rats administered with ethanol (EtOH) and high-fat diet (HFD). Pancreatitis was induced in male albino Wistar rats by administering EtOH (8-12 g/kg/day) and HFD (22% fat) for 90 days. In addition, rats also received 100 mg rutin/kg body weight orally from 31st day till the experimental period. Serum levels of cytokines, interleukin 18 (IL-18) and IL-6; activity levels of caspase-1 and myeloperoxidase (MPO); messenger RNA (mRNA) expression of tumor necrosis factor α (TNF-α), caspase-1, CARD and PYD of ASC; and histological changes in pancreas were assessed. We observed a significant elevation in serum IL-18, IL-6, caspase-1 and MPO activities, mRNA expression of PYD, TNF-α and caspase-1 in the pancreas of rats administered with EtOH and HFD. Rutin administration along with EtOH and HFD significantly upregulated the mRNA expression of CARD and downregulated PYD, caspase-1, and TNF-α expressions. Rutin supplementation was also found to reduce IL-18 and IL-6 levels; and inflammatory changes in tissue architecture were evidenced by histological observations. The anti-inflammatory activity of rutin might be due to its effect on modulating the expression of ASC complex that mediates inflammation.
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