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Evidence that locustatachykinin I is involved in release of adipokinetic hormone from locust corpora cardiaca
Stockholm University, Faculty of Science, Department of Zoology, Functional Morphology.
Utrecht University.
Balaton Limnological Research Institute of the Hungarian Academy of Sciences,Tihany.
Institute of Zoophysiology, University of Bonn, Germany.ORCID iD: 0000-0001-7815-4868
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1995 (English)In: Regulatory Peptides, ISSN 0167-0115, E-ISSN 1873-1686, Vol. 57, no 3, 297-310 p.Article in journal (Refereed) Published
Abstract [en]

The glandular cells of the corpus cardiacum of the locust Locusta migratoria, known to synthesize and release adipokinetic hormones (AKH), are contacted by axons immunoreactive to an antiserum raised against the locust neuropeptide locustatachykinin I (LomTK I). Electron-microscopical immunocytochemistry reveals LomTK immunoreactive axon terminals, containing granular vesicles, in close contact with the glandular cells cells. Release of AKH I from isolated corpora cardiaca of the locust has been monitored in an in vitro system where the amount of AKH I released into the incubation saline is determined by reversed phase high performance liquid chromatography with fluorometric detection. We could show that LomTK I induces release of AKH from corpora cardiaca in a dose-dependent manner when tested in a range of 10-200 microM. This is thus the first clear demonstration of a substance inducing release of AKH, correlated with the presence of the substance in fibers innervating the AKH-synthesizing glandular cells, in the insect corpora cardiaca.

Place, publisher, year, edition, pages
1995. Vol. 57, no 3, 297-310 p.
Keyword [en]
Locusta migratoria; Neuropeptide; Locustatachykinin, Adipokinetic hormone, Hormone release, Corpus cardiacum
National Category
Biological Sciences
Research subject
Zoological physiology
URN: urn:nbn:se:su:diva-40034DOI: 10.1016/0167-0115(95)00043-BPubMedID: 7480879OAI: diva2:326366
Available from: 2010-06-22 Created: 2010-06-04 Last updated: 2014-10-13

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Dircksen, HeinrichCantera, Rafael
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