Article (Scientific journals)
A lateral belt of cortical LGN and NuMA guides mitotic spindle movements and planar division in neuroepithelial cells
Peyre, Elise; Jaouen, Florence; Saadaoui, Mehdi et al.
2011In Journal of Cell Biology
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Abstract :
[en] To maintain tissue architecture, epithelial cells divide in a planar fashion, perpendicular to their main polarity axis. As the centrosome resumes an apical localization in interphase, planar spindle orientation is reset at each cell cycle. We used three-dimensional live imaging of GFP-labeled centrosomes to investigate the dynamics of spindle orientation in chick neuroepithelial cells. The mitotic spindle displays stereotypic movements during metaphase, with an active phase of planar orientation and a subsequent phase of planar maintenance before anaphase. We describe the localization of the NuMA and LGN proteins in a belt at the lateral cell cortex during spindle orientation. Finally, we show that the complex formed of LGN, NuMA, and of cortically located Gai subunits is necessary for spindle movements and regulates the dynamics of spindle orientation. The restricted localization of LGN and NuMA in the lateral belt is instructive for the planar alignment of the mitotic spindle, and required for its planar maintenance
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Peyre, Elise ;  Université de Liège - ULiège > Giga - Neurosciences
Jaouen, Florence;  Université de la Méditerranée/Aix-Marseille II > Developmental Biology Institute (IBDML) > CNRS UMR6216
Saadaoui, Mehdi;  Université de la Méditerranée/Aix-Marseille II > Developmental Biology Institute (IBDML) > CNRS UMR6216
Haren, Laurence;  CNRS-Pierre Fabre
Merdes, Andreas;  CNRS-Pierre Fabre
Durbec, Pascale;  Université de la Méditerranée/Aix-Marseille II, > Developmental Biology Institute (IBDML) > CNRS UMR6216
Morin, Xavier;  Ecole Normale Supérieure, Institut de Biologie de l’ENS, IBENS > INSERM, U1024 ; CNRS, UMR 8197
Language :
English
Title :
A lateral belt of cortical LGN and NuMA guides mitotic spindle movements and planar division in neuroepithelial cells
Publication date :
28 March 2011
Journal title :
Journal of Cell Biology
ISSN :
0021-9525
eISSN :
1540-8140
Publisher :
Rockefeller University Press, New York, United States - New York
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 05 January 2015

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