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Published online April 9, 2007
doi:10.1083/jcb.200609079
The Journal of Cell Biology, Vol. 177, No. 1, 139-150
The Rockefeller University Press, 0021-9525 $30.00
© 2007 Grammont
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Article

 Adherens junction remodeling by the Notch pathway in Drosophila melanogaster oogenesis

Muriel Grammont

Institut National de la Santé et de la Recherche Medicale, Unité 384; University Clermont 1, Unité de Formation et de Recherche Médecine, Clermont-Ferrand F-63001, France

Correspondence to Muriel Grammont: muriel.grammont{at}inserm.u-clermont1.fr

Identifying genes involved in the control of adherens junction (AJ) remodeling is essential to understanding epithelial morphogenesis. During follicular epithelium development in Drosophila melanogaster, the main body follicular cells (MBFCs) are displaced toward the oocyte and become columnar. Concomitantly, the stretched cells (StCs) become squamous and flatten around the nurse cells. By monitoring the expression of epithelial cadherin and Armadillo, I have discovered that the rate of AJ disassembly between the StCs is affected in follicles with somatic clones mutant for fringe or Delta and Serrate. This results in abnormal StC flattening and delayed MBFC displacement. Additionally, accumulation of the myosin II heavy chain Zipper is delayed at the AJs that require disassembly. Together, my results demonstrate that the Notch pathway controls AJ remodeling between the StCs and that this role is crucial for the timing of MBFC displacement and StC flattening. This provides new evidence that Notch, besides playing a key role in cell differentiation, also controls cell morphogenesis.

Abbreviations used in this paper: AJ, adherens junction; A/P, anterior-posterior; ECad, epithelial cadherin; MBFC, main body follicular cell; NC, nurse cell; NCad, Notch cadherin; StC, stretched cell; WT, wild type.


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