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Related Experiment Video

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RNA Isolation from Mouse Ocular Lens Epithelium and Fiber Cell Bulk Masses
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Connexin23 deletion does not affect lens transparency.

Viviana M Berthoud1, Peter J Minogue1, Joseph I Snabb1

  • 1Department of Pediatrics, University of Chicago, Chicago, IL, USA.

Experimental Eye Research
|April 4, 2016
PubMed
Summary
This summary is machine-generated.

The absence of connexin 23 (Cx23) in mouse lenses did not affect lens transparency or refractive properties. Cx23 expression may influence other lens connexins, but its removal does not impact overall lens function.

Keywords:
CataractConnexinGap junctionKnockout mouse

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Area of Science:

  • Ophthalmology
  • Cell Biology
  • Molecular Biology

Background:

  • Connexin 46 (Cx46) and connexin 50 (Cx50) are vital for lens transparency and growth.
  • The role of connexin 23 (Cx23), a recently identified lens fiber connexin, remains unclear.

Purpose of the Study:

  • To investigate the functional consequences of Cx23 absence in mouse lenses.
  • To determine if Cx23 impacts lens transparency, refractive properties, or the levels of other lens connexins.

Main Methods:

  • Generated Cx23-null mice using homologous Cre recombination.
  • Analyzed Cx23 mRNA expression in wild-type and null lenses.
  • Evaluated lens transparency, refractive properties, and light scattering using darkfield microscopy.
  • Assessed the localization and levels of Cx46 and Cx50 in Cx23-null lenses.

Main Results:

  • Cx23 mRNA was abundant in wild-type lenses but absent in Cx23-null lenses.
  • Cx23-null lenses exhibited similar transparency and refractive properties to wild-type lenses.
  • No significant alterations in focusing ability or light scattering were observed.
  • While Cx46 and Cx50 localized correctly, their levels showed a non-significant decrease in homozygous Cx23-null lenses.

Conclusions:

  • Absence of Cx23 does not compromise lens transparency or refractive capabilities.
  • Cx23 may influence the abundance of co-expressed lens connexins, but this does not affect overall lens transparency.
  • These findings clarify the role of Cx23 in lens physiology.