Loss of BBS proteins causes anosmia in humans and defects in olfactory cilia structure and function in the mouse.


Journal Article

Defects in cilia are associated with several human disorders, including Kartagener syndrome, polycystic kidney disease, nephronophthisis and hydrocephalus. We proposed that the pleiotropic phenotype of Bardet-Biedl syndrome (BBS), which encompasses retinal degeneration, truncal obesity, renal and limb malformations and developmental delay, is due to dysfunction of basal bodies and cilia. Here we show that individuals with BBS have partial or complete anosmia. To test whether this phenotype is caused by ciliary defects of olfactory sensory neurons, we examined mice with deletions of Bbs1 or Bbs4. Loss of function of either BBS protein affected the olfactory, but not the respiratory, epithelium, causing severe reduction of the ciliated border, disorganization of the dendritic microtubule network and trapping of olfactory ciliary proteins in dendrites and cell bodies. Our data indicate that BBS proteins have a role in the microtubule organization of mammalian ciliated cells and that anosmia might be a useful determinant of other pleiotropic disorders with a suspected ciliary involvement.

Full Text

Cited Authors

  • Kulaga, HM; Leitch, CC; Eichers, ER; Badano, JL; Lesemann, A; Hoskins, BE; Lupski, JR; Beales, PL; Reed, RR; Katsanis, N

Published Date

  • September 2004

Published In

Volume / Issue

  • 36 / 9

Start / End Page

  • 994 - 998

PubMed ID

  • 15322545

Pubmed Central ID

  • 15322545

International Standard Serial Number (ISSN)

  • 1061-4036

Digital Object Identifier (DOI)

  • 10.1038/ng1418


  • eng

Conference Location

  • United States