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Sökning: WFRF:(Agricola J) > (1999) > Structure, distribu...

Structure, distribution, and biological activity of novel members of the allatostatin family in the crayfish Orconectes limosus.

Dircksen, Heinrich, 1954- (författare)
Institute of Zoophysiology, University of Bonn, Germany
Skiebe, Petra (författare)
Freie Universität Berlin
Abel, Britta (författare)
University of Bonn
visa fler...
Agricola, Hans (författare)
University of Jena
Buchner, Klaus (författare)
Freie Universität Berlin
Muren, J. Eric (författare)
Stockholms universitet,Avdelningen för funktionell zoomorfologi
Nässel, Dick (författare)
Stockholms universitet,Avdelningen för funktionell zoomorfologi
visa färre...
 (creator_code:org_t)
1999
1999
Engelska.
Ingår i: Peptides. - 0196-9781 .- 1873-5169. ; 20:6, s. 695-712
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
Stäng  
  • In the central and peripheral nervous system of the crayfish, Orconectes limosus, neuropeptides immunoreactive to an antiserum against allatostatin I (= Dipstatin 7) of the cockroach Diploptera punctata have been detected by immunocytochemistry and a sensitive enzyme immunoassay. Abundant immunoreactivity occurs throughout the central nervous system in distinct interneurons and neurosecretory cells. The latter have terminals in well-known neurohemal organs, such as the sinus gland, the pericardial organs, and the perineural sheath of the ventral nerve cord. Nervous tissue extracts were separated by reverse-phase high-performance liquid chromatography and fractions were monitored in the enzyme immunoassay. Three of several immunopositive fractions have been purified and identified by mass spectroscopy and microsequencing as AGPYAFGL-NH2, SAGPYAFGL-NH2, and PRVYGFGL-NH2. The first peptide is identical to carcinustatin 8 previously identified in the crab Carcinus maenas. The others are novel and are designated orcostatin I and orcostatin II, respectively. All three peptides exert dramatic inhibitory effects on contractions of the crayfish hindgut. Carcinustatin 8 also inhibits induced contractions of the cockroach hindgut. Furthermore, this peptide reduces the cycle frequency of the pyloric rhythms generated by the stomatogastric nervous system of two decapod species in vitro. These crayfish allatostatin-like peptides are the first native crustacean peptides with demonstrated inhibitory actions on hindgut muscles and the pyloric rhythm of the stomatogastric ganglion.

Ämnesord

NATURVETENSKAP  -- Biologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences (hsv//eng)

Nyckelord

Neuropeptide
Allatostatin
Hindgut
Stomatogastric ganglia
Orconectes limosus
Leucophaea maderae
Cancer pagurus
Cherax destructor
Biology
Biologi
zoofysiologi
Zoological physiology

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