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  • Title: [In vitro secretion of somatostatin (SRIH) by human adenomatous somatotropic cells. Relation with somatotropic hormone (GH) release and modulation by thyroliberin (TRH)].
    Author: Peillon F, Liappi G, Garnier P, Brandi AM, Evain-Brion D, Dodeur M, Gautron JP, Donnadieu M, Michard M, Racadot J.
    Journal: C R Acad Sci III; 1988; 306(4):161-6. PubMed ID: 2896067.
    Abstract:
    SRIH and GH secretions by GH-secreting adenomatous human pituitary cells were analyzed in vitro in a perifusion system. Of the 13 adenomas studied, 7 secreted SRIH, in variable amounts (50 to 700 pg/ml/2 min., corresponding to 600 10,700 pg for the total experiment. SRIH secretion increased during the perifusion, the highest levels being observed at the end of the perifusion. GH secretion also varied from one adenoma to the other (6 to 500 ng/ml). In most cases, the secretion profiles were negatively correlated, GH secretion decreasing while SRIH secretion was increasing. In the presence of 10(-7) M TRH, GH secretion increased while that of SRIH decreased. The hypothesis of a paracrine and/or an autocrine role for SRIH as well as its possible in situ synthesis are discussed.
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