https://scholars.lib.ntu.edu.tw/handle/123456789/142551
Title: | Hyperglycaemic effects of dopamine in tiger shrimp, Penaeus monodon | Authors: | Kuo, Ching-ming Hsu, Chin-rong Lin, Chung-yen |
Keywords: | Penaeids;Hyperglycaernia;Dopamine;Doparninergic receptor;Penaeus monodon | Issue Date: | 1995 | Publisher: | Taipei:National Taiwan University Dept Chem Engn | Start page/Pages: | 161-172 | Source: | Aquaculture 135 | Abstract: | The presence & the physiological functions of biogenic amines as neuroregulators mediating the release of neurohormones have been documented in crustaceans. The possible involvement & the stimulatory pathway of dopamine in hyperglycaemia of the tiger shrimp, Penaeus monodon, were investigated. Two isoforms of crustacean hyperglycaemic hormone (CHH), CHHI & CHHZ, were identified. They were equally potent in the diabetic effect, & showed a great similarity in their amino acid composition profile, which is however, distinct from those reported from other crustacean species, such as the shore crab, Mexican crayfish & American lobster. Thus, species variation in the amino acid composition of CHH exists among the crustaceans. Dopamine was found to mimic the action of CHH in inducing hyperglycaemia in intact shrimps, but not in bilaterally eyestalk-ablated individuals. The hyperglycaemic response of shrimps that were treated with the agonist & antagonist to Dr & Dz receptors, suggest that dopamine functions as a neuroregulator, which in turn stimulates the release of CHH mainly through D, receptors in tiger shrimps. The presence and the physiological functions of biogenic amines as neuroregulators mediating the release of neurohormones have been documented in crustaceans. The possible involvement and the stimulatory pathway of dopamine in hyperglycaemia of the tiger shrimp, Penaeus monodon, were investigated. Two isoforms of crustacean hyperglycaemic hormone (CHH), CHHI and CHHZ, were identified. They were equally potent in the diabetic effect, and showed a great similarity in their amino acid composition profile, which is however, distinct from those reported from other crustacean species, such as the shore crab, Mexican crayfish and American lobster. Thus, species variation in the amino acid composition of CHH exists among the crustaceans. Dopamine was found to mimic the action of CHH in inducing hyperglycaemia in intact shrimps, but not in bilaterally eyestalk-ablated individuals. The hyperglycaemic response of shrimps that were treated with the agonist and antagonist to Dr and Dz receptors, suggest that dopamine functions as a neuroregulator, which in turn stimulates the release of CHH mainly through D, receptors in tiger shrimps. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/2006111501222481 | Other Identifiers: | 246246/2006111501222481 |
Appears in Collections: | 漁業科學研究所 |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.