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MEASUREMENT OF METHIONINE-ENKEPHALINLIKE SUBSTANCE IN CSF FROM NORMAL SUBJECTS AND PATIENTS WITH PITUITARY ADENOMA Tomoo Furui 1 , Akio Kuwayama 1 , Naoki Kageyama 1 1Department of Neurosurgery, Nagoya University School of Medicine pp.305-309
Published Date 1980/3/1
DOI https://doi.org/10.11477/mf.1406204559

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  • Abstract
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Methionine-enkephalin-like substance was meas-ured in CSF by the radioreceptor-assay established by Furui et al. Samples were obtained from pre-operative 20 cases, in which were included 11 cases of pituitary adenoma, 3 cases of craniopharyngioma, 2 cases of pseudtumor cerebri and 4 normal cases, by lumbar puncture. Also postoperative measure-ment of this substance and pre- and postoperative measurement of ACTH in plasma were performed in 5 cases of Cushing's disease. Five ml of CSF was chromatograpied on two succesive columns, lyophilized and assayed for opiate receptor affinity against 3H-dihydromorphine. Measured values were expressed as methionine-enkephalin equiva-lents using the displacement curve run in parallel.

Methionine-enkephalin-like substance level ranged from<0.5 to 20.0 pmoles/ml in all cases and mean value was 2.6 pmoles/ml (±1.0 S.E.) in normal subjects. In Cushing's disease the level was not elevated preoperatively (2.1±0.3) and did not sig-nificantly decrease postoperatively (1.6±0.4 pmoles/ ml) in contrast to the decrease of ACTH in plasma. It is suggested that methionine-enkephalin-like substance in CSF is not derived from ACTH producing cells of pituitary gland. One case of craniopharyngioma showed very high value. This case revealed diabetes insipidus at sampling. The possibility of participation of methionine-enkephalin in secretion of antidiuretic hormone was discussed.


Copyright © 1980, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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