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The aPKC/Par3/Par6 Polarity Complex and Membrane Order Are Functionally Interdependent in Epithelia During Vertebrate Organogenesis
Univ New S Wales, Sch Med Sci, ARC Ctr Adv Mol Imaging, Sydney, NSW 2052, Australia.;Univ New S Wales, Australian Ctr NanoMed, Sydney, NSW 2052, Australia..
Kings Coll London, Dept Phys, London WC2R 2LS, England.;Kings Coll London, Randall Div Cell & Mol Biophys, London WC2R 2LS, England..
Univ New S Wales, Sch Med Sci, ARC Ctr Adv Mol Imaging, Sydney, NSW 2052, Australia.;Univ New S Wales, Australian Ctr NanoMed, Sydney, NSW 2052, Australia..
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2016 (English)In: Traffic: the International Journal of Intracellular Transport, ISSN 1398-9219, E-ISSN 1600-0854, Vol. 17, no 1, 66-79 p.Article in journal (Refereed) Published
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Abstract [en]

The differential distribution of lipids between apical and basolateral membranes is necessary for many epithelial cell functions, but how this characteristic membrane organization is integrated within the polarity network during ductal organ development is poorly understood. Here we quantified membrane order in the gut, kidney and liver ductal epithelia in zebrafish larvae at 3-11 days post fertilization (dpf) with Laurdan 2-photon microscopy. We then applied a combination of Laurdan imaging, antisense knock-down and analysis of polarity markers to understand the relationship between membrane order and apical-basal polarity. We found a reciprocal relationship between membrane order and the cell polarity network. Reducing membrane condensation by exogenously added oxysterol or depletion of cholesterol reduced apical targeting of the polarity protein, aPKC. Conversely, using morpholino knock down in zebrafish, we found that membrane order was dependent upon the Crb3 and Par3 polarity protein expression in ductal epithelia. Hence our data suggest that the biophysical property of membrane lipid packing is a regulatory element in apical basal polarity.

Place, publisher, year, edition, pages
2016. Vol. 17, no 1, 66-79 p.
Keyword [en]
apical and basolateral membranes, epithelial cell, lipid phases, membrane organization, polarity proteins, zebrafish larvae
National Category
Cell Biology
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URN: urn:nbn:se:uu:diva-274433DOI: 10.1111/tra.12339ISI: 000366975200005PubMedID: 26456025OAI: oai:DiVA.org:uu-274433DiVA: diva2:896507
Funder
Swedish Research Council
Available from: 2016-01-21 Created: 2016-01-21 Last updated: 2017-11-30Bibliographically approved

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Majumdar, Arindam

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