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Mechanism of Action of Luteinizing Hormone Releasing Hormone and Thyrotropin Releasing Hormone in the Anterior Pituitary Gland and Modulation of their Activity by Peripheral Hormones

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Hypothalamic Peptide Hormones and Pituitary Regulation

Abstract

A new era of neuroendocrinology started with the elucidation of the structure of porcine and ovine thyrotropin releasing hormone (TRH), the neurohormone controlling the activity of thyrotropin (TSH) and possibly prolactin-secreting cells, as being (pyro)Glu-His-Pro-NH2 (1,2). This achievement was soon followed by the isolation of luteinizing hormone-releasing hormone (LHRH), the neurohormone which stimulates the release of both luteinizing hormone (LH) and follicle stimulating hormone (FSH), and the characterization of LHRH as a decapeptide having the following structure: (pyro)Glu-His-Trp-Ser-Tyr-Gly-Leu-Arg-Pro-Gly-NH2 (3,4). More recently, a tetradecapeptide, H-Ala-Gly-Cys-Lys-Asn-Phe-Phe-Trp-Lys-Thr-Phe-Thr-Ser-Cys-OH, was isolated from ovine and porcine hypothalami (5,6) on the basis of its ability to inhibit growth hormone (GH) release and is called somatostatin or GH release inhibiting hormone.

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Labrie, F., Drouin, J., De Léan, A., Lagacé, L., Ferland, L., Beaulieu, M. (1977). Mechanism of Action of Luteinizing Hormone Releasing Hormone and Thyrotropin Releasing Hormone in the Anterior Pituitary Gland and Modulation of their Activity by Peripheral Hormones. In: Porter, J.C. (eds) Hypothalamic Peptide Hormones and Pituitary Regulation. Advances in Experimental Medicine and Biology, vol 87. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-8849-8_8

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