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  • Title: Augmentation of cholinergic-mediated amylase release by forskolin in mouse parotid gland.
    Author: Watson EL, Singh JC, Jacobson KL.
    Journal: Life Sci; 1985 Dec 30; 37(26):2531-7. PubMed ID: 2417084.
    Abstract:
    Cholinergic-mediated amylase release in mouse parotid acini was augmented by forskolin; the potency but not the maximal response to carbachol was altered. Amylase released by carbachol plus forskolin was dependent on extracellular calcium and was mimicked by the calcium ionophore, A23187 plus forskolin. Forskolin was also shown to enhance carbachol-stimulated 45Ca2+ uptake into isolated acini. Hydroxylamine, nitroprusside, and 8-bromo-c-GMP each in combination with forskolin mimicked the effects of carbachol plus forskolin on amylase release. In the presence of carbachol (10(-8)M) forskolin did not augment c-AMP levels. However, in the presence of carbachol (5 X 10(-7) M) or hydroxylamine (50 microM) forskolin did significantly augment c-AMP accumulation. These results suggest that calcium and c-GMP may mediate the augmentation of cholinergic-mediated amylase release by effects on c-AMP metabolism.
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