Published online January 7, 2008
doi:10.1083/jcb.200710085
The Journal of Cell Biology, Vol. 180, No. 1, 17-21
The Rockefeller University Press, 0021-9525 $30.00
© 2008 Marshall
The cell biological basis of ciliary disease
Wallace F. Marshall
Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA 94143
Correspondence to Wallace F. Marshall: wmarshall{at}biochem.ucsf.edu
Defects in cilia cause a broad spectrum of human diseases known collectively as the ciliopathies. Although all ciliopathies arise from defective cilia, the range of symptoms can vary significantly, and only a small subset of the possible ciliary disease symptoms may be present in any given syndrome. This complexity is puzzling until one realizes that the cilia are themselves exceedingly complex machines that perform multiple functions simultaneously, such that breaking one piece of the machine can leave some functions intact while destroying others. The clinical complexity of the ciliopathies can therefore only be understood in light of the basic cell biology of the cilia themselves, which I will discuss from the viewpoint of cell biological studies in model organisms.
Abbreviations used in this paper: IFT, intraflagellar transport; PCD, primary ciliary dyskinesia; PKD, polycystic kidney disease.

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