scholarly journals Differential adaptations in rod outer segment disc membranes in different models of congenital stationary night blindness

2020 ◽  
Vol 1862 (10) ◽  
pp. 183396 ◽  
Author(s):  
Subhadip Senapati ◽  
Paul S.-H. Park
Keyword(s):  
Night Blindness ◽  
Outer Segment ◽  
Congenital Stationary Night Blindness ◽  
Rod Outer Segment

High time resolution enzyme cytochemistry of rod outer segment

1990 ◽  
Vol 48 (3) ◽  
pp. 878-879
Author(s):  
Takuma Saito ◽  
Toshihiro Takizawa
Keyword(s):  
Enzyme Activities ◽  
Outer Segment ◽  
Rapid Change ◽  
High Time Resolution ◽  
Visual Cell ◽  
Enzyme Cytochemistry ◽  
Activation Effect ◽  
Rod Outer Segment ◽  
Enzymatic Cascades ◽  
Rapid Drop

Cells and tissues live on a number of dynamic metabolic pathways, which are made up of sequential enzymatic cascades.Recent biochemical and physiological studies of vision research showed the importance of cGMP metabolism in the rod outer segment of visual cell, indicat ing that the photon activated rhodopsin exerts activation effect on the GTP binding protein, transducin, and this act ivated transducin further activates phosphodiesterase (PDEase) to result in a rapid drop in cGMP concentration in the cytoplasm of rod outer segment. This rapid drop of cGMP concentration exerts to close the ion channel on the plasma membrane and to stop of inward current brings hyperpolarization and evokes an action potential.These sequential change of enzyme activities, known as cGMP cascade, proceeds quite rapidly within msec order. Such a rapid change of enzyme activities, such as PDEase in rod outer segment, was not a matter of conventional histochemical invest igations.

scholarly journals Substantial restoration of night vision in adult mice with congenital stationary night blindness

2021 ◽  
Author(s):  
Juliette Varin ◽  
Nassima Bouzidi ◽  
Gregory Gauvain ◽  
Corentin Joffrois ◽  
Melissa Desrosiers ◽  
...  
Keyword(s):  
Night Blindness ◽  
Night Vision ◽  
Congenital Stationary Night Blindness ◽  
Adult Mice
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