Dally regulates Dpp morphogen gradient formation in the Drosophila wing

Momoko Fujise ¹, Satomi Takeo , Keisuke Kamimura

⁰Department of Biology, Tokyo Metropolitan University, Hachioji-shi, Tokyo 192-0397, Japan.

Development (cambridge, England). Supplement +

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March 7, 2003

View abstract on PubMed

Summary

Dally, a proteoglycan, enhances Decapentaplegic (Dpp) signaling in Drosophila wings. It regulates Dpp distribution and cellular responses, shaping the Dpp morphogen gradient essential for development.

Area Of Science

Developmental Biology
Molecular Biology
Genetics

Background

Decapentaplegic (Dpp) is a crucial morphogen in Drosophila, directing cell fate along the wing's anteroposterior axis.
Dpp is a heparin-binding protein whose signaling is modulated by the cell-surface proteoglycan Dally.
The precise mechanisms governing Dpp morphogen gradient formation and maintenance remain incompletely understood.

Purpose Of The Study

To investigate the role of Dally in regulating Dpp morphogen gradient establishment and maintenance.
To elucidate how Dally influences cellular responses to Dpp and Dpp distribution within tissues.

Main Methods

Analysis of dally gene expression in the developing Drosophila wing disc.
Investigating the relationship between dally expression and thick veins (a Dpp type I receptor) expression.
Assessing the impact of altered Dally levels on cellular sensitivity to Dpp and Dpp gradient dynamics.

Main Results

Dally expression in the wing disc is regulated by pathways controlling thick veins expression.
Increased Dally levels enhance cellular sensitivity to Dpp in a cell-autonomous manner.
Dally influences both the distribution and activity gradients of the Dpp morphogen.

Conclusions

Dally plays a significant role in modulating Dpp morphogen gradient formation and maintenance.
Dally acts as a co-receptor for Dpp, contributing to the precise shaping of morphogen gradients.
Understanding Dally's function provides insights into developmental signaling pathways.