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Membrane Traffic and Apicobasal Polarity in Drosophila Epithelial Cells

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Cell Polarity 1
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Abstract

Previous chapters have introduced the core determinants of apicobasal polarity in different cell types. This chapter will examine how these determinants become localised to particular membrane domains in Drosophila. In some cell types, such as neuroblasts, polarity does not rely on transmembrane proteins or membrane trafficking. In contrast, epithelial cell polarity involves several key transmembrane proteins, such as Crumbs and E-cadherin, and their distribution depends critically on the exocytic and endocytic machinery. In addition, certain types of epithelial cells secrete an apical extracellular matrix and a basement membrane matrix, processes that must involve polarised exocytic delivery of matrix components. Disruption of membrane trafficking can therefore lead to loss of epithelial polarity and tumour-like phenotypes in Drosophila.

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Acknowledgements

I thank Georgina Fletcher and Eliana Lucas for helping in preparing the figures. I also apologise to my colleagues working with C. elegans, or mammalian cells in culture, whose important work could not be cited here due to space limitations.

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Correspondence to Barry J. Thompson .

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© 2015 Springer International Publishing Switzerland

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Thompson, B.J. (2015). Membrane Traffic and Apicobasal Polarity in Drosophila Epithelial Cells. In: Ebnet, K. (eds) Cell Polarity 1. Springer, Cham. https://doi.org/10.1007/978-3-319-14463-4_14

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