Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/9983
Title: <i style="">In vitro</i> effects of 5-hydroxytryptophan, indoleamines and leptin on arylalkylamine N-acetyltransferase (AA-NAT) activity in pineal organ of the fish, <i style="">Clarias gariepinus</i> (Burchell, 1822) during different phases of the breeding cycle
Authors: Gupta, B B P
Yanthan, L
Singh, Ksh Manisana
Keywords: AA-NAT
Breeding phase
5-HTP
Indoleamines
Leptin
Melatonin
Pinea
Issue Date: Aug-2010
Publisher: CSIR
Abstract: Arylalkylamine N-acetyltransferase (AA-NAT) is the rate-limiting enzyme of melatonin biosynthetic pathway. <i style="">In vitro</i> effects of 5-hydroxytryptophan (5-HTP) and indoleamines (serotonin, N-acetylserotonin and melatonin) were studied on AA-NAT activity in the pineal organ of the fish, <i style="">C. gariepinus</i> during different phases of its annual breeding cycle. Further, <i style="">in vitro e</i>ffects of leptin on AA-NAT activity in the pineal organ were studied in fed and fasted fishes during summer and winter seasons. Treatments with 5-HTP and indoleamines invariably stimulated pineal AA-NAT activity in a dose-dependent manner during all the phases. However, leptin increased AA-NAT activity in a dose-dependent manner only in the pineal organ of the fed fishes, but not of the fasted fishes irrespective of the seasons
Description: 786-792
URI: http://hdl.handle.net/123456789/9983
ISSN: 0975-1009 (Online); 0019-5189 (Print)
Appears in Collections:IJEB Vol.48(08) [August 2010]

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