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Title Transcription
メダカ ハクショク ソホウ ノ カリュウ カクサン オ チュウカイスル アドレナリンセイ ジュヨウタイ
Title Alternative
Adrenergic Receptors Mediating Pigment Dispersion in Leucophores of a Teleost, Oryzias latipes
File
language
eng
Author
Iga, Tetsuro
Yamada, Koji
Iwakiri, Minoru
Description
Using leucophores in isolated scales of a fresh-water teleost, Oryzias latipes, experirnents were designed to characterize the nature of adrenergic receptors mediating the pigment-dispersing response. Adrenaline, Noradrenaline and isoproterenol caused dispersion of the pigment within both innervated and denervated leucophores, indicating that these amines act directly on the cells. The order of potency of these catecholamines for inducing the pigment dispersion within the leucophores was isoproterenol> noradrenaline> adrenaline. Pretreatment with dibenamine or ergotamine, alpha adrenergic blocking agents, did not affect the responses of leucophores to these agonists. On the other hand, propranolol or dichloroisoproterenol, beta adrenergic blocking agents, inhibited the pigment-dispersing effect of these amines. From these results, it was concluded that the adrenergic receptors mediating pigment dispersion within the leucophores are of beta nature.
Journal Title
Memoirs of the Faculty of Literature and Science, Shimane University. Natural sciences
Volume
11
Start Page
63
End Page
72
ISSN
03709434
Published Date
1977-12-20
NCID
AN0010806X
Publisher
島根大学文理学部
Publisher Aalternative
The Faculty of Literature and Science, Shimane University
NII Type
Departmental Bulletin Paper
OAI-PMH Set
Faculty of Science and Engineering