Related Experiment Videos
Membrane alterations during cataract development in the Nakano mouse lens
Investigative Ophthalmology & Visual Science
|June 1, 1980
Summary
Gap junctions in Nakano mouse lenses decrease significantly with age and cataract formation. This reduction in gap junctions and associated membrane proteins may contribute to cataract development.
Area of Science:
- Ophthalmology
- Cell Biology
- Biochemistry
Background:
- Gap junctions are crucial for intercellular communication in the lens.
- Cataract formation involves structural and biochemical changes in lens cells.
Purpose of the Study:
- To investigate the changes in gap junctions and associated proteins during cataract development in Nakano mice.
- To correlate these changes with the progression of cataracts.
Main Methods:
- Microscopic examination of anterior cortical fiber cells in Nakano mouse lenses at different ages (12 days, 29 days, 7 months, 90 days).
- Biochemical analysis of membrane protein fractions, focusing on a 26,000 MW polypeptide.
Main Results:
- A large number of gap junctions were observed in 12-day-old Nakano mouse lenses, similar to normal lenses.
- By 29 days, gap junction numbers were comparable, but their size decreased with cataract formation.
- Gap junctions were nearly absent in 7-month-old mice.
- A significant reduction in a 26,000 MW polypeptide was noted in 29-day-old and 90-day-old Nakano mouse lenses, correlating with decreased gap junctions.
Conclusions:
- Alterations in gap junctions and membrane-associated polypeptides in the Nakano mouse lens are linked to cataract development.
- The decrease in gap junction structures and specific proteins may play a role in the pathogenesis of cataracts.