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  • Title: Nitric oxide plays no role in ACTH release induced by interleukin-1 beta, corticotropin-releasing hormone, arginine vasopressin and phorbol myristate acetate in rat pituitary cell cultures.
    Author: Hashimoto K, Nishioka T, Tojo C, Takao T.
    Journal: Endocr J; 1995 Jun; 42(3):435-9. PubMed ID: 7545507.
    Abstract:
    To investigate the role of nitric oxide (NO) in pituitary ACTH secretion, the effect of a nitric oxide synthase (NOS) inhibitor, N omega-Nitro-L-arginine (Nitro-Arg), on ACTH secretion induced by interleukin (IL)-1 beta, corticotropin releasing hormone (CRH), arginine vasopressin (AVP) and phorbol myristate acetate (PMA) was examined in rat anterior pituitary cell cultures. Nitro-Arg did not affect IL-1 beta-induced ACTH release in pituitary cell cultures incubated with Dulbecco modified Eagle's medium, Basal Medium Eagle or Krebs Ringer bicarbonate-glucose buffer. It did not affect CRH-, AVP- or PMA-induced ACTH release either. These results suggest that NO does not play an important role in ACTH release at the pituitary level.
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