Reviews–A Peer Reviewed Forum
Axonemal positioning and orientation in three-dimensional space for primary cilia: What is known, what is assumed, and what needs clarification
Article first published online: 19 OCT 2011
Copyright © 2011 Wiley Periodicals, Inc.
Volume 240, Issue 11, pages 2405–2431, November 2011
How to Cite
Farnum, C. E. and Wilsman, N. J. (2011), Axonemal positioning and orientation in three-dimensional space for primary cilia: What is known, what is assumed, and what needs clarification. Dev. Dyn., 240: 2405–2431. doi: 10.1002/dvdy.22756
- Issue published online: 19 OCT 2011
- Article first published online: 19 OCT 2011
- Manuscript Accepted: 6 SEP 2011
- NIH. Grant Numbers: R21-AR053849, RO1-AR052003, R01-AM25282
- primary cilium;
- 3D orientation;
Two positional characteristics of the ciliary axoneme—its location on the plasma membrane as it emerges from the cell, and its orientation in three-dimensional (3D) space—are known to be critical for optimal function of actively motile cilia (including nodal cilia), as well as for modified cilia associated with special senses. However, these positional characteristics have not been analyzed to any significant extent for primary cilia. This review briefly summarizes the history of knowledge of these two positional characteristics across a wide spectrum of cilia, emphasizing their importance for proper function. Then the review focuses what is known about these same positional characteristics for primary cilia in all major tissue types where they have been reported. The review emphasizes major areas that would be productive for future research for understanding how positioning and 3D orientation of primary cilia may be related to their hypothesized signaling roles within different cellular populations. Developmental Dynamics 240:2405–2431, 2011. © 2011 Wiley Periodicals, Inc.