Daple Coordinates Planar Polarized Microtubule Dynamics in Ependymal Cells and Contributes to Hydrocephalus

Publication date: 25 July 2017
Source:Cell Reports, Volume 20, Issue 4
Author(s): Maki Takagishi, Masato Sawada, Shinya Ohata, Naoya Asai, Atsushi Enomoto, Kunihiko Takahashi, Liang Weng, Kaori Ushida, Hosne Ara, Shigeyuki Matsui, Kozo Kaibuchi, Kazunobu Sawamoto, Masahide Takahashi
Motile cilia in ependymal cells, which line the cerebral ventricles, exhibit a coordinated beating motion that drives directional cerebrospinal fluid (CSF) flow and guides neuroblast migration. At the apical cortex of these multi-ciliated cells, asymmetric localization of planar cell polarity (PCP) proteins is required for the planar polarization of microtubule dynamics, which coordinates cilia orientation. Daple is a disheveled-associating protein that controls the non-canonical Wnt signaling pathway and cell motility. Here, we show that Daple-deficient mice present hydrocephalus and their ependymal cilia lack coordinated orientation. Daple regulates microtubule dynamics at the anterior side of ependymal cells, which in turn orients the cilial basal bodies required for the directional cerebrospinal fluid flow. These results demonstrate an important role for Daple in planar polarity in motile cilia and provide a framework for understanding the mechanisms and functions of planar polarization in the ependymal cells.

Graphical abstract

Teaser

Multiple motile cilia exhibit a coordinated beating motion that drives directional fluid flow, but how the cells coordinate cilia orientation remains an open question. Takagishi et al. show that a planar cell polarity protein, Daple, regulates microtubule dynamics at the anterior side of ependymal cells, which orients the cilia.


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