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The Antagonism between Juvenile Hormone and Ecdysone

  • M. Lezzi
  • C. Wyss

Abstract

The aim of this paper is to discuss the following three questions: 1) is there an antagonism between juvenile hormone (JH) and ecdysone (Ec); 2) if so, what is the nature of the antagonism; 3) what is its role in insect development? However, it is not the aim of this paper to disprove the notions of those people (Doane, 1973; Laufer and Calvet, 1972; Wyatt, 1972; Willis, 1974) who use other terms to describe the interaction between JH and Ec. We emphasize this point for three reasons: 1) whether or not one designates the effect of JH in relation to that of Ec “antagonistic”, “modificatory” or “in concert” is, in our opinion, mainly a matter of semantics; 2) we have never claimed that antagonism is the only mode of JH-Ec interaction as we have always agreed that the JH-Ec antagonism is not strict (Lezzi and Frigg, 1971) because there are conditions under which JH does not antagonize the effect of ecdysone (Lezzi and Gilbert, 1969); 3) we ourselves shall present some evidence that JH and Ec are not likely to bind to each other or to a common receptor. Thus, the interaction between JH and Ec is not an antagonism in the strict molecular or pharmacological sense. However, in a general sense we may speak of an antagonism whenever one hormone interferes with a step previous or subsequent to the interaction of another hormone with a receptor.

Keywords

Salivary Gland Juvenile Hormone Swiss Federal Institute Juvenile Hormone Analog Molting Hormone 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1976

Authors and Affiliations

  • M. Lezzi
    • 1
  • C. Wyss
    • 1
  1. 1.Institute for Cell BiologySwiss Federal Institute of TechnologyZurichSwitzerland

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