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Biomedical subjects

M M Kochhar

Publications and source records attributed to M M Kochhar.

15 recordsLinked to original sources
PubMed1986

Teratologic effects of d,1-2-(o-chlorophenyl)-2-(methylamino) cyclohexanone hydrochloride (ketamine hydrochloride) in rats.

Studies were conducted of the teratologic effects of ketamine hydrochloride in rats. Ketamine treatment had no significant effect on the number of animals per litter. The histological examination of heart, liver, and kidney showed focal nuclear hypochromatosis and interfibrillary edema; diffuse hemopoietic cell infiltration, and parenchymal cell degeneration; proximal convoluted tubule degeneration. The degenerative effect is also dependent upon the dose and the duration of treatment.

Animals↗
PubMed1978

Effects of ketamine on brain monoamine levels in rats.

The effects of ketamine (50 mg/kg i.p.) on brain monoamines, including epinephrine, norepinephrine, dopamine, serotonin and its metabolite 5-hydroxy indoleacetic acid, were studied in three groups of male Sprague-Dawley rats. A rapid, simple, accurate, and sensitive spectrophotoflurometric method was developed to determine monoamines extracted from rat brain. Ketamine significantly increased brain epinephrine (25%), serotonin (28%) and 5-hydroxy indoleacetic acid (32%) in rats. In contrast, norepinephrine (43%) and dopamine (58%) levels were significantly reduced at 30 minutes. The increase in epinephrine (13%) and decrease in norepinephrine (31%) and dopamine (38%) levels remained significant 12 hours after ketamine injection. Serotonin and 5-hydroxy indoleacetic acid levels returned to almost normal in ketamine pretreated animals after 12 hours. Thus, the ability of ketamine to interfere with monoamine metabolism was revealed.

Animals↗
PubMed1977

Metabolism and probable active metabolite of alpha-l-acetylmethadol in rat.

alpha-l-Acetylmethadol is being currently evaluated as a substitute for methadone in the treatment of heroin addicts. The metabolites, isolated from urine, liver, and serum, were identified by gas-liquid chromatography. Methadone and its metabolites were found to be present in urine, liver and serum of rats treated with alpha-l-acetylmethadol. The presence of methadone was confirmed by gas-chromatography-mass spectometry. The purpose of this study was to determine whether alpha-l-acetylmethadol is metabolized to methadone, which might explain in part the longer duration of action of alpha-l-acetylmethadol.

Animals↗
PubMed1976

Thin-layer and gas chromatographic determination of ketamine and its biotransformed products in biological fluids.

Ketamine, (2-(o-chlorophenyl)-2-methylamine cyclohexanone) and its in vivo metabolite I (2-(o-chlorophenyl)-2-aminocyclohexanone) and metabolite II (2-(o-chlorophenyl)-2-amino-5-cyclohexene-1-one) were determined by thin-layer (TLC) and gas chromatography (GC). In vivo studies include intraperitoneal injection of ketamine in rats. Urine and blood samples were collected at regular intervals. The unreacted ketamine and its biotransformed products were extracted from urine and blood and subjected to TLC and GC analysis. 1% Carbowax-20M on Gas Chrom G-AW-DMCS and precoated LQ6D TLC plates were used in this study. In conclusion a rapid, simple, accurate, and sensitive thin-layer and gas chromatographic method for the identification of ketamine and its metabolites from biological fluids have been developed.

Animals↗
PubMed1975

A training program in bioanalytical toxicology.

Students of diversified backgrounds are taught methods used in bioanalytical toxicology such as TLC, GLC, RIA, EMIT, UV, and spectrofluorometry. Major emphasis is placed on the detection of abused drugs in biologic specimens. It was found that the students with more advanced formal education have learned the lecture theory and instrumentation quicker and in greater detail. However, as far as the ability to work rapidly and accurately, many of the trainees who have had less formal education have shown better ability. Perhaps it could be said that the theory is a science, whereas the work is an art. This art through practice can be better developed by some people regardless of education. On completion of this training, they will be able to help fill the great need for toxicologic technicians.

Allied Health Personnel↗