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Related Experiment Videos

UVR-B induced cataract development in C57 mice.

Linda M Meyer1, Per Söderberg, Xiuqin Dong

  • 1Research Department, St Erik's Eye Hospital, Karolinska Institutet, Polhemsgatan 50, SE-112 82 Stockholm, Sweden. linda.meyer@ste.ki.se

Experimental Eye Research
|September 28, 2005
PubMed
Summary

Ultraviolet radiation type B (UVR-B) exposure caused cataracts and increased light scattering in C57 mice lenses. Light scattering peaked two days post-exposure, indicating dynamic changes in the lens.

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Area of Science:

  • Ophthalmology
  • Photobiology
  • Toxicology

Background:

  • Ultraviolet radiation type B (UVR-B) is a known ocular hazard.
  • The C57 mouse is a common model for studying ocular diseases.
  • Understanding UVR-B effects on the lens is crucial for preventing vision impairment.

Purpose of the Study:

  • To investigate the morphological changes and light scattering intensity in C57 mice lenses after UVR-B exposure.
  • To determine the time course of these changes following a specific UVR-B dose.

Main Methods:

  • 80 female C57BL/6 mice were exposed unilaterally to UVR-B (300 nm, 5 kJm⁻²) for 15 minutes.
  • Lenses were examined macroscopically using photography at 1, 2, 4, and 8 days post-exposure.
  • Light scattering was quantitatively measured in exposed and contralateral (unexposed) lenses.

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Main Results:

  • UVR-B exposure induced subcapsular, cortical, and nuclear cataracts in all exposed lenses.
  • Exposed lenses exhibited significantly higher light scattering compared to controls at all time points.
  • A transient peak in light scattering was observed at day 2 in both exposed and contralateral lenses.

Conclusions:

  • A single dose of UVR-B (5 kJm⁻²) induces cataract formation and increased light scattering in C57 mouse lenses.
  • The observed increase in light scattering demonstrates dynamic changes in the lens following UVR-B insult.
  • The contralateral lens also showed transient light scattering changes, suggesting potential systemic or indirect effects.