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. 1990 Dec;101(4):1001–1005. doi: 10.1111/j.1476-5381.1990.tb14196.x

Pharmacological characterization of tachykinin-stimulated inositol phospholipid hydrolysis in peripheral tissues.

N Suman-Chauhan 1, S Guard 1, B J Williams 1, K J Watling 1
PMCID: PMC1917849  PMID: 1707702

Abstract

1. Tachykinin-stimulated inositol phospholipid hydrolysis was examined in slices of rat parotid gland, hamster urinary bladder and guinea-pig ileum longitudinal muscle. 2. In the presence of lithium, substance P and other naturally-occurring and synthetic tachykinins induced large, dose-dependent increases in [3H]-inositol monophosphate accumulation. 3. In slices of rat parotid gland, [pGlu6,L-Pro9]SP(6-11) was considerably more potent in stimulating inositol phospholipid hydrolysis than [pGlu6,D-Pro9]SP(6-11). 4. In contrast, in slices of hamster urinary bladder, [pGlu6,D-Pro9]SP(6-11) exhibited greater potency in evoking inositol phospholipid breakdown than [pGlu6,L-Pro9]SP(6-11). 5. The differential selectivity of these C-terminal fragments of substance P suggests that they may be useful tools for distinguishing between NK1 and NK2 receptors. 6. L-659,837 and L-659,874 antagonized eledoisin-stimulated inositol phospholipid hydrolysis in slices of hamster urinary bladder. Neither compound significantly reduced substance-P evoked inositol phospholipid breakdown in slices of rat parotid gland, or senktide-induced inositol phospholipid hydrolysis in slices of guinea-pig ileum. 7. L-659,837 and L-659,874 had no effect on the atropine-sensitive, carbachol-stimulated inositol phospholipid hydrolysis in slices of rat parotid gland. 8. These data further support the notion that L-659,837 and L-659,874 are potent and selective NK2 receptor antagonists.

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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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