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"Ant-egg" cataract revisited.

Kåre Clemmensen1, Jan J Enghild2, Anders Ivarsen3

  • 1Department of Ophthalmology, Aarhus University Hospital, 8000, Aarhus, Denmark. Kaare.clemmensen@gmail.com.

Graefe'S Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Fur Klinische Und Experimentelle Ophthalmologie
|November 7, 2016
PubMed
Summary

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This summary is machine-generated.

Hereditary "ant-egg" cataract structures contain unique proteins not found in the human lens. These congenital cataract formations remain stable in size and location even after surgical removal.

Area of Science:

  • Ophthalmology
  • Genetics
  • Biochemistry

Background:

  • Hereditary congenital cataracts present diverse lens opacities.
  • A rare form, "ant-egg" cataract, was first described in 1900.
  • Previous studies utilized microscopy and imaging for "ant-egg" characterization.

Purpose of the Study:

  • To characterize "ant-egg" cataract using advanced technology.
  • To analyze the protein composition of "ant-egg" structures.
  • To track the stability of "ant-eggs" post-cataract extraction.

Main Methods:

  • Optical Coherence Tomography (OCT) for structural analysis.
  • Mass spectrometry to identify proteins and their abundance.
  • Immunohistochemical staining for specific protein markers (cytokeratin, S100).
Keywords:
Anterior OCTCongenital cataractConnexin46HereditaryHistologyMass spectonometryProteome

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Main Results:

  • "Ant-egg" structures were located on the iris and remained stable for over 45 years.
  • Mass spectrometry identified 56 proteins in "ant-eggs"; 18 (32%) were novel to the human lens.
  • Immunohistochemistry confirmed the presence of cytokeratin and S100.

Conclusions:

  • The study reveals the unique protein profile of "ant-egg" cataract.
  • A significant portion of identified proteins are not native to the human lens.
  • "Ant-eggs" exhibit remarkable stability in size and location over time and after extraction.