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. 1979 Apr;65(4):683–687. doi: 10.1111/j.1476-5381.1979.tb07882.x

Assessment of the effects of vasoactive intestinal peptide (VIP) on blood flow through and salivation of the dog salivary gland in comparison with those of secretin, glucagon and acetylcholine.

T Shimizu, N Taira
PMCID: PMC1668682  PMID: 435691

Abstract

1. The vascular bed of the submandibular gland in situ was perfused with blood through the glandular artery at a constant pressure in anesthetized dogs. All drugs were administered intra-arterially. 2. Vasoactive intestinal peptide (VIP), secretin and acetylcholine produced a dose-dependent increase in blood flow through the artery (vasodilatation) but glucagon was almost ineffective. 3. Dose-blood flow response curves for VIP and secretin were parallel, and VIP was about 100 times as potent as secretin on a molar basis. Dose-blood flow response curves for acetylcholine were flatter than those for VIP and secretin. Acetylcholine was approximately as potent as secretin on a molar basis. 4. No tachyphylaxis developed to the vasodilator action of VIP. 5. The vasodilator responses to VIP and to electrical stimulation of the chordolingual nerve were scarcely modified by (-)-hyoscyamine in doses that fully antagonized the vasodilator response to acetylcholine. 6. VIP, secretin and glucagon were ineffective in eliciting salivary secretion. 7. The possibility that VIP is released from parasympathetic vasodilator nerves and mediates the atropine-resistant vasodilatation in the dog submandibular gland is discussed.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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