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Dpp signaling activity requires pentagone to scale with tissue size in the growing Drosophila Wing Imaginal Disc

Hamaratoglu Dion, Fisun, de Lachapelle, Aitana Morton, Pyrowolakis, George, Bergmann, Sven and Affolter, Markus 2011. Dpp signaling activity requires pentagone to scale with tissue size in the growing Drosophila Wing Imaginal Disc. PLoS Biology 9 (10) , e1001182. 10.1371/journal.pbio.1001182

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Abstract

The wing of the fruit fly, Drosophila melanogaster, with its simple, two-dimensional structure, is a model organ well suited for a systems biology approach. The wing arises from an epithelial sac referred to as the wing imaginal disc, which undergoes a phase of massive growth and concomitant patterning during larval stages. The Decapentaplegic (Dpp) morphogen plays a central role in wing formation with its ability to co-coordinately regulate patterning and growth. Here, we asked whether the Dpp signaling activity scales, i.e. expands proportionally, with the growing wing imaginal disc. Using new methods for spatial and temporal quantification of Dpp activity and its scaling properties, we found that the Dpp response scales with the size of the growing tissue. Notably, scaling is not perfect at all positions in the field and the scaling of target gene domains is ensured specifically where they define vein positions. We also found that the target gene domains are not defined at constant concentration thresholds of the downstream Dpp activity gradients P-Mad and Brinker. Most interestingly, Pentagone, an important secreted feedback regulator of the pathway, plays a central role in scaling and acts as an expander of the Dpp gradient during disc growth.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Publisher: Public Library of Science
ISSN: 1545-7885
Date of First Compliant Deposit: 3 January 2019
Date of Acceptance: 15 September 2011
Last Modified: 03 Jan 2019 11:12
URI: http://orca.cf.ac.uk/id/eprint/117990

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