Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UNIPROT:P47989 (xanthine oxidase)
 8,633 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Experiments were conducted on 268 male albino rats with modeled acute pancreatitis to study the xanthine oxidase (XO) activity in the pancreatic tissue during intraperitoneal administration of stimulators of pancreatic exocrine function (pilocarpine) and inhibitors of enzyme activity (allopurinol). Pilocarpine (0.1 mg/kg) increased XO activity by 90-100% one-three hours after injection, which was due to increased synthesis of the enzyme. Allopurinol (500 mg/kg) inhibiting XO activity removes the XO activating effect of pilocarpine in the first two hours after injection. It was established that one of the tranquilizers of the 1,4-benzodiazepine series--seduxen (15 mg/kg) produces an inhibiting effect on XO activity and, like allopurinol, removes the XO activating effect of pilocarpine. Complete parallelism was also revealed between the dynamics of changes of XO activity in the pancreatic tissue and alpha-amylase in blood under the effect of the preparations studied.
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PMID:[Role of xanthine oxidase in the genesis of acute pancreatitis]. 275 30

Experiments in vivo and in vitro on 90 rats were made to study the influence of 1,4-benzodiazepine tranquilizers (phenazepam, nitrazepam and diazepam) on cerebral xanthine oxidase activity. Phenazepam, nitrazepam and diazepam in the dose of 5 mg per 200 g bw were shown to reduce xanthine oxidase activity by 80.4%, 64.3% and 55.8%, respectively 2 h after intraperitoneal injection. 6 h after the injection of benzodiazepines the enzyme activity grows, but control values are achieved only after nitrazepam injection. In vitro experiments revealed direct influence of the tranquilizers on xanthine oxidase. Phenazepam inhibits xanthine oxidase activity in concentration as long as 10(-10) M (to 36.6%), and practically completely in 10(-6) M concentration. Nitrazepam and diazepam inhibit xanthine oxidase activity within concentration range between 10(-8) M (to 51.5% and 33.2%, respectively), and 10(-4) M (practically completely). The inhibition of xanthine oxidase activity is shown to be caused by the competition between hypoxanthine, the reaction substrate, and tranquilizer, to bind with the active site of the enzyme.
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PMID:[Effect of tranquilizers of the 1,4-benzodiazepine series on the xanthine oxidase activity of the rat brain]. 290 85