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Title Transcription
スミウキゴリ ノ ウンドウセイ コウシキ ソホウ ノ ウンドウ チョウセツ
Title Alternative
Regulation of Motile Iridophores of the Floating Goby, Chaenogobius sp. 2
File
language
eng
Author
Iga, Tetsuro
Asari, Taichi
Description
lridophores in the dermis of the floating goby, Chaenogobius sp. 2, are motile. Their movements involved centrifugal or centripetal migration of the light-reflecting platelets within the cells. High K+ solution induced dispersion of the platelets in the cells. This response was lost in iridophores in denervated scale preparations. These results suggested that K+ acted on the nerve controlling the iridophores to release the transmitter. Norepinephrine, whirch was assumed to be the transmitter in the nerve, caused the platelet dispersion. The action was inhibited by an alpha adrenergic antagonist, phenoxybenzamine, but not by a beta adrenergic one , propranolol. This indicated that norepinephrine acted on the alpha adrenoceptors on the cell membrane to induce the platelet dispersion. Forskolin, a unique activator of adenylate cyclase , was effective in inducing aggregation of the platelets. Melatonin enhanced aggregation of the platelets. Alpha MSH had no observable effect on the iridophores. Based on these results, it was concluded that Chaenogobius iridophores are under the dual control of the sympathetic adrenergic nerve and melatonin, the hormone from the pineal gland and that anincrease in the intracellular cAMP induces the platelet aggregation within the cells.
Journal Title
Memoirs of the Faculty of Science, Shimane University
Volume
25
Start Page
53
End Page
61
ISSN
03879925
Published Date
1991-12-25
NCID
AN00108106
Publisher
島根大学理学部
Publisher Aalternative
The Faculty of Science, Shimane University
NII Type
Departmental Bulletin Paper
OAI-PMH Set
Faculty of Science and Engineering