theophylline/porumb

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Effect of metabolic inhibitors, methylxanthines, antioxidants, alkali metals, and corn oil on 1,2-dimethylhydrazine carcinogenicity in rats.

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The effect of the oral administration of 10 compounds on 1,2-dimethylhydrazine (DMH) carcinogenesis was investigated in 180 male Wistar rats and 510 male BD6 rats. DMH, administered s.c. once per week for 20 consecutive weeks (20 mg/kg body wt/dose), produced intestinal (mainly colon) tumors of

Theophylline-induced mesenteric periarteritis in F344/N rats.

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The toxicity and carcinogenic potential of theophylline (an alkaloid bronchodilator drug) was investigated in male and female F344/N rats in 16-day, 14-week, and 2-year gavage and feeding studies. In 16-day studies, rats were fed diets containing 0, 500, 1000, 2000, 4000, and 8000 ppm of

Studies on the short-term toxicity of theophylline in rats and mice.

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The purpose of these studies was to evaluate the short-term toxicity of theophylline, a compound present in tea and used in a variety of clinical applications. Fourteen-day repeated-dose toxicity studies were conducted in B6C3F1 mice and F344 rats of both sexes. Theophylline was administered in feed

NTP Toxicology and Carcinogenesis Studies of Theophylline (CAS No. 58-55-9) in F344/N Rats and B6C3F1 Mice (Feed and Gavage Studies).

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Theophylline is an alkaloid found in tea (Thea sinensis) and chocolate and is structurally related to caffeine and theobromine. Theophylline is used as a pharmaceutical agent. It stimulates the heart and central nervous system, relaxes the smooth muscles of the bronchi and blood vessels, and causes

Inhibition and induction of theophylline metabolism by 8-methoxypsoralen. In vivo study in rats and humans.

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The effects of 8-methoxypsoralen (8-MOP) on the metabolism of theophylline were studied in rats and humans. Rats were randomized into three groups and prepared with iv jugular catheters. Group I (N = 4) received a single ip injection of 27 mg/kg of 8-MOP, group II (N = 5) vehicle (corn oil), and

Beta-adrenergic receptor-mediated functions in porcine adipose tissue are not affected differently by saturated vs. unsaturated dietary fats.

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Young postweaning pigs were fed a high fat diet containing beef tallow (saturated fat) or corn oil (unsaturated fat). Adipose tissue was used to measure adipocyte size and number of cells per gram of tissue, ligand binding by beta-adrenergic receptors and lipolytic and palmitate esterification

Alteration of drug kinetics in rats following exposure to trichloroethylene.

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The effect of trichloroethylene (TCY) was investigated to determine whether repeated exposure alters the pharmacokinetics of some drugs. Sprague-Dawley rats were given intraperitoneal injections of TCY (5 mmol/kg) in corn oil once daily for 3 days, while the control group received only corn oil.

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