Methionine enkephalin-induced changes in pigmentation of zebrafish (Cyprinidae, Brachydanio rerio) and related species and varieties, measured videodensitometrically. II. Pearl and gold danios.
| Autor: | Gordon R, Levina S |
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| Jazyk: | angličtina |
| Zdroj: | General and comparative endocrinology [Gen Comp Endocrinol] 1983 Sep; Vol. 51 (3), pp. 378-83. |
| DOI: | 10.1016/0016-6480(83)90053-9 |
| Abstrakt: | In the fish Brachydanio albolineatus (pearl danio) MSH-induced darkening was similar to that of the B. rerio (zebrafish). However, they showed a greatly reduced response to methionine enkephalin (met-E) though these fish apparently have normal dermal melanophores. This suggests a central nature of met-E-induced darkening and on the other hand at least a partial lack of MSH production and/or release in response to met-E in these fish. Therefore this reduction in the response to met-E may involve a partial lack of opiate receptors in the cells that provide or stimulate MSH production in the pearl danio. In the B. rerio gold mutant met-E appeared to be able to induce production and/or release of MSH, but these fish have almost no dermal melanophores (except a few in the dorsal and tail fins) and therefore show no darkening in response to either MSH or met-E. |
| Databáze: | MEDLINE |
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