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DWnt4 and wingless elicit similar cellular responses during imaginal development.
K Gieseler1, E Wilder, M C Mariol
1Laboratoire de Génétique et Physiologie du Développement, Institut de Biologie du Développement de Marseille, CNRS/INSERM/Université de la Méditerranée, Parc Scientifique de Luminy, Case 907, Marseille Cedex 9, 13288, France.
Developmental Biology
|June 13, 2001
Summary
Divergent Wnt genes DWnt4 and wingless (wg) show similar functions in Drosophila imaginal development. DWnt4 can substitute for wg, suggesting cooperation in limb patterning.
Area of Science:
- Developmental Biology
- Molecular Genetics
- Drosophila melanogaster research
Background:
- Wnt genes are crucial for development, exhibiting conserved features alongside sequence divergence.
- This divergence likely contributes to varied signaling activities, as seen with DWnt4 and wingless (wg).
Purpose of the Study:
- To investigate the functional similarities between DWnt4 and wingless (wg) during Drosophila imaginal development.
- To explore the potential for DWnt4 to elicit similar cellular responses and signaling capabilities as wg.
Main Methods:
- Ectopic expression of DWnt4 in Drosophila imaginal discs.
- Analysis of adult appendage morphogenesis and wing disc transformations.
- Rescue experiments for wg loss-of-function phenotypes in antennae and halteres.
- Examination of gene transcription domains in imaginal discs.
Main Results:
- Ectopic DWnt4 expression altered adult appendage morphogenesis, phenocopying ectopic Wg activity.
- DWnt4 rescued wg loss-of-function phenotypes and substituted for Wg in wing field specification.
- DWnt4 and wg were found to be transcribed in overlapping domains within imaginal discs.
Conclusions:
- DWnt4 and wg exhibit similar signaling capabilities and can elicit comparable cellular responses in imaginal development.
- DWnt4 may cooperate with wg in the patterning of Drosophila limbs, particularly during appendage development.