QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

First published online August 3, 2005
doi: 10.1242/10.1242/jcs.02464

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Pallavi, S. K. Articles by Shashidhara, L. S. Search for Related Content PubMed PubMed Citation Articles by Pallavi, S. K. Articles by Shashidhara, L. S. Social Bookmarking                         What's this?

Signaling interactions between squamous and columnar epithelia of the Drosophila wing disc

Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad, 500 007 India

^* Author for correspondence (e-mail: shashi{at}ccmb.res.in)

Accepted 28 April 2005

Understanding the interactions between distinct epithelial cells would help us to understand the development of tissues. Drosophila imaginal discs, which are made up of two types of epithelial cells, provide good model systems for such studies. The disc proper or the columnar epithelial cells are apposed to a layer of squamous epithelial cells (the peripodial membrane). We have examined organization of peripodial and disc proper cells vis-à-vis their polarity since cell polarity plays an important role in the polarized transport of signaling molecules. With the help of polarity-specific cell markers, we have observed that apical surfaces of peripodial and disc proper cells face each other. This provides the cellular basis for the recently demonstrated signaling interactions between peripodial and disc proper cells during disc patterning. We also report significant similarities as well as differences between peripodial and disc proper cells in Engrailed-dependent wingdisc-patterning events, which make them an appropriate model system for studying the mechanism of diffusion of signal molecules, such as Hedgehog. Results with wild-type and two mutant forms of Hedgehog suggest that direct cell-cell contact is a requirement for the movement of wild-type Hedgehog signal and reconfirm that cholesterol-modification of Hedgehog makes it a short-range signaling molecule by restricting its movement.

Key words: Hedgehog, Cell polarity, Peripodial membrane, Notch, A/P axis

CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?

This article has been cited by other articles:

				F. Wendler, X. Franch-Marro, and J.-P. Vincent How does cholesterol affect the way Hedgehog works? Development, August 15, 2006; 133(16): 3055 - 3061. [Abstract] [Full Text] [PDF]