Summary
The enzymes monoamine oxidase A (MAO A), monoamine oxidase B (MAO B) and benzylamine oxidase (BzAO) have been localized histochemically in the human uterus during various phases of the menstrual cycle. The results show a large increase in MAO A activity in the endometrial gland cells in the secretory phase of the cycle. MAO B activity was found in both endometrium and myometrium but did not show a cyclical variation in activity. BzAO was localized primarily in the tunica media of the myometrial blood vessels. These observations have been supported by parallel biochemical assays.
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This research was supported by the Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CN Pq), Brazil and The Wellcome Trust, U.K., who defrayed the salary of Rachel Lewinsohn
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Ryder, T.A., MacKenzie, M.L., Lewinsohn, R. et al. Amine oxidase histochemistry of the human uterus during the menstrual cycle. Histochemistry 67, 199–204 (1980). https://doi.org/10.1007/BF00493237
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DOI: https://doi.org/10.1007/BF00493237