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Developmental Biology
Article
License: Elsevier Non-Commercial
Data sources: UnpayWall
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Developmental Biology
Article . 2003
License: Elsevier Non-Commercial
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Developmental Biology
Article . 2003 . Peer-reviewed
License: Elsevier Non-Commercial
Data sources: Crossref
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Stage-specific regulation of caspase activity in drosophila oogenesis

Authors: Peterson, J.S; Barkett, M; McCall, K;

Stage-specific regulation of caspase activity in drosophila oogenesis

Abstract

In Drosophila oogenesis, the programmed cell death of germline cells occurs predominantly at three distinct stages. These cell deaths are subject to distinct regulatory controls, as cell death during early and midoogenesis is stress-induced, whereas the cell death of nurse cells in late oogenesis is developmentally regulated. In this report, we show that the effector caspase Drice is activated during cell death in both mid- and late oogenesis, but that the level and localization of activity differ depending on the stage. Active Drice formed localized aggregates during nurse cell death in late oogenesis; however, active Drice was found more ubiquitously and at a higher level during germline cell death in midoogenesis. Because Drice activity was limited in late oogenesis, we examined whether another effector caspase, Dcp-1, could drive the unique morphological events that occur normally in late oogenesis. We found that premature activation of the effector caspase, Dcp-1, resulted in a disappearance of filamentous actin, rather than the formation of actin bundles, suggesting that Dcp-1 activity must also be restrained in late oogenesis. Overexpression of the caspase inhibitor DIAP1 suppressed cell death induced by Dcp-1 but had no effect on cell death during late oogenesis. This limited caspase activation in dying nurse cells may prevent destruction of the nurse cell cytoskeleton and the connected oocyte.

Related Organizations
Keywords

Time Factors, Ovary, Gene Expression Regulation, Developmental, Apoptosis, Cell Biology, Caspase, Caspase Inhibitors, Nurse cell, Actins, Inhibitor of Apoptosis Proteins, Animals, Genetically Modified, dcp-1, Oogenesis, Drice, Caspases, Animals, Drosophila Proteins, Drosophila, Female, Molecular Biology, Programmed cell death, Developmental Biology

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Powered by OpenAIRE graph
citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
97
Top 10%
Top 10%
Top 10%
hybrid