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Biomedical subjects

A L Misra

Publications and source records attributed to A L Misra.

At least 55 records · Page 3Linked to original sources
PubMed1975

Laeve-[1-3H]Methadone disposition in tolerant dogs.

1. Following a subcutaneous dose (4mg/kg) of [3H]methadone, peak levels of drug occurred in plasma, tissues and selected areas of the central nervous system (CNS) 2h after injection in both non-tolerant and tolerant dogs. Highest concentrations of methadone were attained in bile and lung compared to other tissues. 2. Levels of methadone in plasma, tissue and CNS of tolerant and non-tolerant animals were not markedly different up to 8h after injection, but a much faster rate of egression of free drug (lower t1/2) was observed subsequently in tolerant dogs. 3. Peak levels of methadone in various areas of the CNS ranged between 2-7 (spinal cord) to 3-6 (thalamus) mug/g in non-tolerant and 3-0 -rebellum) to 4-1 (thalamus) mug/g in tolerant dogs 2h after injection. No marked accumulation of methadone occurred in selected areas of the CNS in spite of the persistence of drug in these areas. 4. The plasma protein electrophoretic profiles did not differ between control, non-tolerant and tolerant dogs. 5. Similar qualitative patterns of metabolites were observed in non-tolerant and tolerant dogs and the development of tolerance did not appear to modify the metabolic pathways of methadone.

Animals↗
PubMed1975

Calcium-binding property of cocaine and some of its active metabolites-formation of molecular complexes.

Cocaine, benzoylecgonine, benzoylnorecgonine, norcocaine, ecgonine methyl ester but not ecgonine formed distinct molecular complexes with calcium chloride of the general formula [B. CaC12-2H20]. The particularly strong interaction observed with benzoylecgonine, benzoylnorecgonine and calcium may play a role in the potent stimulant activity of these 2 compounds observed in rats after intracisternal administration.

Calcium↗