Y. Araki et al., FURTHER MAPPING OF THE ACHATINA GIANT-NEURON TYPES SENSITIVE TO THE NEUROACTIVE PEPTIDES ISOLATED FROM INVERTEBRATES, General pharmacology, 26(8), 1995, pp. 1701-1708
1. The effects of the 10 synthetic neuroactive peptides originally iso
lated from invertebrates, applied locally to the neurone tested by the
brief pneumatic pressure ejection on the identifiable neurone types o
f Achatina fulica Ferussac were examined. 2. Achatin-1 (Gly-D-Phe-Ala-
Asp), an Achatina endogenous tetrapeptide having a D-phenylalanine res
idue, ejected locally, showed the depolarizing effects on nearly half
of the number of neurone types tested. 3. ACEP-1 (Ser-Gly-Gln-Ser-Trp-
Arg-Pro-Gln-Giy-Arg-Phe-NH2), isolated originally from Achatina atria,
and pedal peptide p-Ser-Val-Tyr-Gly-Thr-His-Gly-Met-Ser-Gly-Phe-Ala)
and buccalin (Gly-Met-Asp-Ser-Leu-Ala-Phe-Ser-Gly-Gly-Leu-NH2) found i
n Aplysia neurones, showed excitatory effects on some Achatina neurone
types. 4. Myomodulin (Pro-Met-Ser-Met-Leu-Arg-Leu-NH2), found in Aply
sia neurones, produced a hyper polarization on nearly half of the numb
er of Achatina neurone types tested. The two FMRFamide-like peptides,
(EDPFLRFamide (<Glu-Asp-Pro-Phe-Leu-Arg-Phe-NH2), isolated from Helix
heart, and AF1 (Lys-Asn-Glu-Phe-Ile-Arg-P he-NH,), from Ascaris head,
also showed hyperpolarizing effects on more than half of the number of
Achatina neurone types. 5. SALMFamide 1 (Gly-Phe-Asn-Ser-Ala-Leu-Mer-
Phe-NH2), isolated from Asterias nervous system,CCAP (Pro-Phe-Cys-Asn-
Ala-Phe-Thr-Gly-Cys-NH2) from Carcinus pericardial organ, and corazoni
n <Glu-Thr-Phe-Glns-Tyr-Ser-Arg-Gly-Trp-Thr-Asn-NH2) from Periplaneta
cardiac corpus, had no effect on Achatina neurones.