Functions of the intermediate filament cytoskeleton in the eye lens

J Clin Invest. 2009 Jul;119(7):1837-48. doi: 10.1172/JCI38277. Epub 2009 Jul 1.


Intermediate filaments (IFs) are a key component of the cytoskeleton in virtually all vertebrate cells, including those of the lens of the eye. IFs help integrate individual cells into their respective tissues. This Review focuses on the lens-specific IF proteins beaded filament structural proteins 1 and 2 (BFSP1 and BFSP2) and their role in lens physiology and disease. Evidence generated in studies in both mice and humans suggests a critical role for these proteins and their filamentous polymers in establishing the optical properties of the eye lens and in maintaining its transparency. For instance, mutations in both BFSP1 and BFSP2 cause cataract in humans. We also explore the potential role of BFSP1 and BFSP2 in aging processes in the lens.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Aging / genetics
  • Animals
  • Cataract / etiology
  • Eye Proteins / genetics
  • Eye Proteins / physiology*
  • Humans
  • Intermediate Filament Proteins / genetics
  • Intermediate Filament Proteins / physiology*
  • Intermediate Filaments / physiology*
  • Lens, Crystalline / physiology*
  • Mice
  • Mutation
  • Vimentin / physiology
  • alpha-Crystallin B Chain / physiology


  • Eye Proteins
  • Intermediate Filament Proteins
  • Vimentin
  • alpha-Crystallin B Chain
  • filensin
  • phakinin