Histochemical localization of monoamine oxidase types A and B in the adrenal gland |
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Authors: | Stephen W Carmichael and Gina L Pfeiffer |
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Institution: | (1) Department of Anatomy, Mayo Clinic, 55905 Rochester, Minnesota, USA |
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Abstract: | Summary The distribution of monoamine oxidase types A and B within the adrenal galdn was studied in several mammals by histochemical methods. Controls showed that the methods were valid. The bovine adrenal medulla contained mostly the B type enzyme, distributed heterogeneously, with some A type associated with endothelium, nerves, and cells surrounding the nerves. The bovine adrenal cortex showed a marked zonation of the two types of monoamine oxidase. The zona glomerulosa contained the B type enzyme and the zona fasciculata and zona reticularis contained the type A enzyme. The adrenal medulla of the dog, cat, and rat demonstrated relatively little enzyme activity and it appeared to be both type A and B. The adrenal cortex of these animals appeared to contain mostly the B type enzyme, except the canine zona reticularis, which contained some A type monoamine oxidase as well. |
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