title: Ellagic acid inhibits pancreatic fibrosis in male Wistar Bonn/Kobori rats.
abstract: The key pathological features of chronic pancreatitis are chronic inflammation, acinar atrophy, and pancreatic fibrosis. We have previously shown that ellagic acid, a plant-derived polyphenol found in fruits and nuts, inhibited activation of pancreatic stellate cells, a major profibrogenic cell type in the pancreas, in vitro. Here we examined whether ellagic acid inhibited the development of pancreatic fibrosis in vivo. Ellagic acid was administered orally in the diet to ten-week-old male Wistar Bonn/Kobori rats, an experimental model of spontaneous chronic pancreatitis, for ten weeks. Ellagic acid (100 mg/kg body weight/day) attenuated pancreatic inflammation and fibrosis. The protective effects were confirmed by an increase in pancreatic weight and decreases in myeloperoxidase activity (an index of neutrophil infiltration), collagen content, transforming growth factor-beta1 expression, and the number of alpha-smooth muscle actin-positive cells (activated pancreatic stellate cells) and ED-1-positive cells (macrophages/monocytes). Ellagic acid inhibited the production of reactive oxygen species in pancreatic stellate cells in response to transforming growth factor-beta1 or platelet-derived growth factor. Our results suggest that ellagic acid might be a candidate for treatment of chronic pancreatitis.
authors.affiliation: Division of Gastroenterology, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai, 980-8574, Japan.
authors.forename: Noriaki
authors.initials: N
authors.lastname: Suzuki
authors.forename: Atsushi
authors.initials: A
authors.lastname: Masamune
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Kikuta
authors.forename: Takashi
authors.initials: T
authors.lastname: Watanabe
authors.forename: Kennichi
authors.initials: K
authors.lastname: Satoh
authors.forename: Tooru
authors.initials: T
authors.lastname: Shimosegawa
mesh_terms: D000199:Actins / Q000378:metabolism; D000818:Animals; D004610:Ellagic Acid / Q000627:therapeutic use*; D005355:Fibrosis; D007962:Leukocytes / Q000502:physiology; D008297:Male; D010179:Pancreas / Q000378:metabolism / Q000473:pathology*; D010182:Pancreatic Diseases / Q000378:metabolism / Q000473:pathology / Q000517:prevention & control*; D008517:Phytotherapy; D051381:Rats; D017208:Rats, Wistar; D017382:Reactive Oxygen Species / Q000378:metabolism; D053773:Transforming Growth Factor beta1 / Q000378:metabolism
chemical_list: D000199:Actins; D004610:Ellagic Acid; D017382:Reactive Oxygen Species; D053773:Transforming Growth Factor beta1; C498862:Acta2 protein, rat