Original title: Contribution to the study of insect stress hormones
Translated title: Contribution to the study of insect stress hormones
Authors: ALQUICER BARRERA, Glenda Paola
Document type: Doctoral theses
Year: 2009
Language: cze
Abstract: The present study considers the versatile role of adipokinetic hormones (AKHs). Using the firebug Pyrrhocoris apterus as a model insect, the hypothesis that AKHs mediate stress response mechanisms was explored. The outcome indicated that there is a positive feedback regulation between an oxidative stressor action and the level of AKH in insect body, and that AKHs might be involved in the activation of antioxidant protection mechanism. Further results revealed a functional homology between AKH and the mammalian hormone glucagon. The possible effects of glucagon on mobilisation of energy reserves and on elicitation of an antioxidant response to oxidative stress were investigated. As a result, glucagon-immunoreactive material was detected for the first time in the firebug central nervous system and gut. Antioxidant mechanisms are elicited after glucagon treatment but it did not involve mobilization of energy reserves or AKH level changes. As a complement, the existence of a feedback between juvenile hormone and AKH was investigated by topical application of the juvenile hormone analogue methoprene, which influenced the release of AKH from the central nervous system into the haemolymph and induced a partial reduction of lipid content in haemolymph.
Keywords: adipokinetic hormone; glucagon; juvenile hormone analogue; oxidative stress; Pyrrhocoris apterus; stress hormones; adipokinetic hormone; glucagon; juvenile hormone analogue; oxidative stress; Pyrrhocoris apterus; stress hormones
Citation: ALQUICER BARRERA, Glenda Paola. Contribution to the study of insect stress hormones. České Budějovice, 2009. disertační práce (Ph.D.). JIHOČESKÁ UNIVERZITA V ČESKÝCH BUDĚJOVICÍCH. Přírodovědecká fakulta

Institution: University of South Bohemia in České Budějovice (web)
Document availability information: Fulltext is available in the Digital Repository of University of South Bohemia.
Original record: http://www.jcu.cz/vskp/7496

Permalink: http://www.nusl.cz/ntk/nusl-52370


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Universities and colleges > Public universities > University of South Bohemia in České Budějovice
Academic theses (ETDs) > Doctoral theses