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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

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Suda, T. et al.

Effects of corticotropin-releasing factor and other materials on adrenocorticotropin secretion from pituitary glands of patients with Cushing's disease in vitro.

ACTH responsiveness in vitro to synthetic corticotropin-releasing factor (CRF), lysine-8-vasopressin, and cAMP was examined using superfusion of pituitary adenoma tissue and the nonadenomatous tissue from 16 patients with Cushing's disease. Sensitivity of adenomas to lysine-8-vasopressin and cAMP was similar to that of nonadenomatous tissues; however, sensitivity of adenomas to CRF was lower than that of nonadenomatous tissues in 7 of 16 patients. CRF- induced ACTH secretion from adenomas was inhibited by Ca2+-free medium in all instances and by dexamethasone and somatostatin in some. Angiotensins I and II stimulated ACTH secretion from both adenomas and nonadenomatous tissues, while angiotensin I-induced ACTH secretion was inhibited by angiotensin-converting enzyme inhibitor. These results suggest that the sensitivity of the pituitary corticotroph adenomas to CRF in some patients is low. This may be due to an abnormality of the step(s) before cAMP formation, such as the CRF receptor.[1]

References

Effects of corticotropin-releasing factor and other materials on adrenocorticotropin secretion from pituitary glands of patients with Cushing's disease in vitro. Suda, T., Tomori, N., Tozawa, F., Demura, H., Shizume, K. J. Clin. Endocrinol. Metab. (1984) [Pubmed]

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