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Biomedical subjects

M E Wall

Publications and source records attributed to M E Wall.

At least 91 records · Page 5Linked to original sources

A complex pattern of disposition of phenytoin in severe intoxication.

A 5-year-old child developed phenytoin (diphenylhydantoin, DPH) toxicity after receiving 500 mg of the drug daily for 3 weeks. Plasma, urine, and duodenal fluid were collected for assay of DPH and its metabolites. The peak plasma concentration of DPH was 108 mug/ml, and the decline in plasma level did not fit first-order kinetics. The para-hydroxy, meta-hydroxy, and dihydrodiol metabolites of DPH were measured in urine; duodenal aspirate contained both DPH and the para-hydroxy metabolite. Plasma pH may affect distribution of DPH since in vitro binding of DPH to human albumin increased as pH increased.

Child, Preschool↗

Intravenous injection in man of 9 -tetrahydrocannabinol and 11-OH- 9 -tetrahydrocannabinol.

A microsuspension of Delta(9)-tetrahydrocannabinol and of its metabolic derivative 11-OH-Delta(9)-tetrahydrocannabinol has been prepared with 25 percent human serum albumin as the vehicle. Intravenous infusion of this preparation to humans indicates that both tetrahydrocannabinols are equally potent in producing the typical marihuana-like pschological and physiological effects.

Adult↗

Distribution of delta 9-tetrahydrocannabinol in the mouse.

1. The distribution of Delta(9)-tetrahydrocannabinol-(14)C in the pregnant and nonpregnant mouse is very similar. High concentrations of radiolabel can be seen in the maternal liver, spleen, lungs, brown fat, adrenal glands, mammary glands, yolk sac placenta and corpora lutea. In the pregnant mouse Delta(9)-THC crosses the placenta and enters the foetuses in very low concentrations, with no apparent selective intrafoetal radiolabel accumulation sites. Autoradiograms showing the distribution of (14)C-cannabinoid 2 h after dosing are presented.2. A small amount of maternal liver and foetal tissue was removed from the mice, used for autoradiography and extracted with ethyl acetate. Most of the radiolabel in these tissues was solvent extractable and was separated by thin layer chromatography into two fractions, THC and metabolites.3. It appears that most of the cannabinoid is present in a free rather than conjugated form.

Acetates↗