Interplay of JH, 20E and biogenic amines under normal and stress conditions and its effect on reproduction |
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Authors: | Gruntenko N E Rauschenbach I Yu |
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Institution: | Laboratory of Stress Genetics, Institute of Cytology and Genetics, Siberian Division of Russian Academy of Sciences, Lavrentjev ave. 10, 630090 Novosibirsk, Russia. nataly@bionet.nsc.ru |
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Abstract: | Juvenile hormone (JH) and 20-hydroxyecdysone (20E) are well known to play a gonadotropic role in adult insects. In Drosophila the mechanism of reciprocal regulation of JH and 20E is shown to be responsible for their proper balance. Dopamine is a mediator in this JH and 20E interplay. A proper balance between JH and 20E is crucial for the normal progress of oogenesis. An imbalance of gonadotropins leads to reproductive defects: a rise in JH titre leads to oviposition arrest, a rise in 20E level, to the degradation of vitellogenic oocytes. Upon a change in the level of one of the gonadotropins, the balance is restored owing to the relative change in the titre of the other. |
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Keywords: | Drosophila Juvenile hormone 20-Hydroxyecdysone Biogenic amines Oogenesis |
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