Premium
Flavocoxid, a dual inhibitor of cyclooxygenase‐2 and 5‐lipoxygenase, reduces pancreatic damage in an experimental model of acute pancreatitis
Author(s) -
Polito F,
Bitto A,
Irrera N,
Squadrito F,
Fazzari C,
Minutoli L,
Altavilla D
Publication year - 2010
Publication title -
british journal of pharmacology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.432
H-Index - 211
eISSN - 1476-5381
pISSN - 0007-1188
DOI - 10.1111/j.1476-5381.2010.00933.x
Subject(s) - acute pancreatitis , pancreatitis , medicine , ceruletide , pancreas , endocrinology , cyclooxygenase , inflammation , lipoxygenase , prostaglandin e , chemistry , enzyme , biochemistry , cholecystokinin , receptor
BACKGROUND AND PURPOSE Acute pancreatitis is an autodigestive process resulting in acute inflammation of the pancreas. Accumulating evidence indicates the essential contribution of cyclooxygenase (COX)‐2 and 5‐lipoxygenase (5‐LOX) to acute pancreatitis. We studied the effects of flavocoxid, a plant‐derived dual inhibitor of COX‐2 and 5‐LOX, in a model of caerulein (CER)‐induced acute pancreatitis. EXPERIMENTAL APPROACH Rats were given CER (80 µg·kg −1 for each of four injections at hourly intervals) or vehicle (Sham‐CER). Animals were then randomized to receive flavocoxid (20 mg·kg −1 i.p.) or vehicle, 30 min after the first CER injection. Two hours after the last CER injection, we evaluated damage to the pancreas by histological methods; serum levels of amylase, lipase , leukotriene (LT)B 4 and prostaglandin (PG)E 2 ; pancreatic expression of COX‐2 and 5‐LOX and tumour necrosis factor‐α (TNF‐α) gene expression by real‐time polymerase chain reaction. KEY RESULTS Caerulein induced inflammatory changes in the pancreas and raised values of the other variables measured. In CER‐treated animals, but not in those given saline, flavocoxid inhibited COX‐2 and 5‐LOX expression, reduced serum levels of lipase and amylase and the degree of pancreatic oedema. Treatment with flavocoxid blunted the increased pancreatic TNF‐α mRNA expression, serum leukotriene B 4 and prostaglandin E 2 levels, and protected against histological damage in terms of vacuolization and leukocyte infiltration. CONCLUSIONS AND IMPLICATIONS Our results confirm the key role of both COX‐2 and 5‐LOX in the inflammatory response to acute pancreatitis. Flavocoxid may provide a potential therapeutic approach to the treatment of patients at high risk of developing this life‐threatening condition.