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© Research
Publication : The Journal of cell biology

Dlg1 controls planar spindle orientation in the neuroepithelium through direct interaction with LGN

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The Journal of cell biology - 08 Sep 2014

Saadaoui M, Machicoane M, di Pietro F, Etoc F, Echard A, Morin X

Link to Pubmed [PMID] – 25202028

J. Cell Biol. 2014 Sep;206(6):707-17

Oriented cell divisions are necessary for the development of epithelial structures. Mitotic spindle orientation requires the precise localization of force generators at the cell cortex via the evolutionarily conserved LGN complex. However, polarity cues acting upstream of this complex in vivo in the vertebrate epithelia remain unknown. In this paper, we show that Dlg1 is localized at the basolateral cell cortex during mitosis and is necessary for planar spindle orientation in the chick neuroepithelium. Live imaging revealed that Dlg1 is required for directed spindle movements during metaphase. Mechanistically, we show that direct interaction between Dlg1 and LGN promotes cortical localization of the LGN complex. Furthermore, in human cells dividing on adhesive micropatterns, homogenously localized Dlg1 recruited LGN to the mitotic cortex and was also necessary for proper spindle orientation. We propose that Dlg1 acts primarily to recruit LGN to the cortex and that Dlg1 localization may additionally provide instructive cues for spindle orientation.

http://www.ncbi.nlm.nih.gov/pubmed/25202028