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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Characterization of the endokinins: human tachykinins with cardiovascular activity.

We report four human tachykinins, endokinins A, B, C, and D (EKA-D), encoded from a single tachykinin precursor 4 gene that generates four mRNAs (alpha, beta, gamma, and delta). Tachykinin 4 gene expression was detected primarily in adrenal gland and in the placenta, where, like neurokinin B, significant amounts of EKB-like immunoreactivity were detected. EKA/B 10-mers displayed equivalent affinity for the three tachykinin receptors as substance P (SP), whereas a 32-mer N-terminal extended form of EKB was significantly more potent than EKA/B or SP. EKC/D, which possess a previously uncharacterized tachykinin motif, FQGLL-NH(2), displayed low potency. EKA/B displayed identical hemodynamic effects to SP in rats, causing short-lived falls in mean arterial blood pressure associated with tachycardia, mesenteric vasoconstriction, and marked hindquarter vasodilatation. Thus, EKA/B could be the endocrineparacrine agonists at peripheral SP receptors and there may be as yet an unidentified receptor(s) for EKC/D.[1]

References

  1. Characterization of the endokinins: human tachykinins with cardiovascular activity. Page, N.M., Bell, N.J., Gardiner, S.M., Manyonda, I.T., Brayley, K.J., Strange, P.G., Lowry, P.J. Proc. Natl. Acad. Sci. U.S.A. (2003) [Pubmed]
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