Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:3.2.1.20 (alpha-glucosidase)
 4,237 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

C57B1/6 male normal mice were treated with 5-FU (200 mg/kg i.p.) alone or in combination with a bolus injection of uridine (2 x 3500 mg/kg i.p.) in order to study the potential rescue effect of uridine on 5-FU-induced gastrointestinal toxicity. 5-FU alone inhibited the activity of different enzymes (thymidine-kinase, alkaline-phosphatase, sucrase and maltase) which were selected as the early biochemical markers for the injured small intestinal mucosa. The nadir of the enzyme activities was between 24-96 hrs after 5-FU administration, and the complete regeneration took a week. In the combination of 5-FU plus uridine bolus injection the seriousness of gastrointestinal damage caused by 5-FU was significantly (p < 0.05) milder and the recovery time was shorter by 2 days. Comparing the rescue effect of two dose schedules of uridine, both high dose (2 x 3500 mg/kg) or repeated lower doses of uridine (7 x 800 mg/kg) resulted in a similar protection from the gastrointestinal side effect of 5-FU.
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PMID:Influence of uridine treatment in mice on the protection of gastrointestinal toxicity caused by 5-fluorouracil. 831 13

Selective protection of the normal host tissues from the toxic effects of anticancer agents would allow the use of higher, probably more effective, doses of the drugs. It has been demonstrated that delayed high-dose uridine administration after 5-fluorouracil decreases the extent of myelosuppression and causes faster regeneration of the bone marrow. We studied the biochemical consequences of the gastrointestinal toxicity caused by 5-fluorouracil and the potential of high-dose uridine treatment to influence these adverse effects. 5-Fluorouracil caused dose-related decreases in the biochemical parameters (thymidine kinase, sucrase, maltase, alkaline phosphatase) selected as early markers of the impaired metabolic activity of the intestinal mucosa. The nadir of the biochemical changes was reached between 24 h and 72 h after 5-fluorouracil treatment, and complete regeneration of the mucosa took 6-7 days. Delayed high-dose uridine administration failed to mitigate the severity of the gastrointestinal damage that ensued after 5-fluorouracil treatment, but caused significantly earlier regeneration of the mucosa.
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PMID:Biochemical consequences of 5-fluorouracil gastrointestinal toxicity in rats; effect of high-dose uridine. 850 Feb 30