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  Chronic low-dose pro-oxidant treatment stimulates transcriptional activity of telomeric retroelements and increases telomere length in Drosophila.

Korandová, M., Krucek, T., Szakosová, K., Kodrík, D., Kühnlein, R. P., Tomasková, J., et al. (2018). Chronic low-dose pro-oxidant treatment stimulates transcriptional activity of telomeric retroelements and increases telomere length in Drosophila. Journal of Insect Physiology, 104, 1-8. doi:10.1016/j.jinsphys.2017.11.002.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-2BDE-A Version Permalink: http://hdl.handle.net/21.11116/0000-0003-79BD-1
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 Creators:
Korandová, M., Author
Krucek, T., Author
Szakosová, K., Author
Kodrík, D., Author
Kühnlein, R. P.1, Author              
Tomasková, J., Author
Frydrychová, R. C., Author
Affiliations:
1Research Group of Molecular Physiology, MPI for biophysical chemistry, Max Planck Society, ou_578592              

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Free keywords: Drosophila; Hormesis; Hydrogen peroxide; Oxidative stress; Paraquat; Telomeres
 Abstract: It has been proposed that oxidative stress, elicited by high levels of reactive oxygen species, accelerates telomere shortening by erosion of telomeric DNA repeats. While most eukaryotes counteract telomere shortening by telomerase-driven addition of these repeats, telomeric loss in Drosophila is compensated by retrotransposition of the telomeric retroelements HeT-A, TART and TAHRE to chromosome ends. In this study we tested the effect of chronic exposure of flies to non-/sub-lethal doses of paraquat, which is a redox cycling compound widely used to induce oxidative stress in various experimental paradigms including telomere length analyses. Indeed, chronic paraquat exposure for five generations resulted in elevated transcriptional activity of both telomeric and non-telomeric transposable elements, and extended telomeric length in the tested fly lines. We propose that low oxidative stress leads to increased telomere length within Drosophila populations. For a mechanistic understanding of the observed phenomenon we discuss two scenarios: adaption, acting through a direct stimulation of telomere extension, or positive selection favoring individuals with longer telomeres within the population.

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Language(s): eng - English
 Dates: 2017-11-062018-01
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1016/j.jinsphys.2017.11.002
 Degree: -

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Title: Journal of Insect Physiology
Source Genre: Journal
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Pages: - Volume / Issue: 104 Sequence Number: - Start / End Page: 1 - 8 Identifier: -