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Myelin-associated glycoprotein in the developing human retina
Experimental Eye Research
|April 1, 1986
Summary
Myelin-associated glycoprotein (MAG) presence in human Müller cells was studied during retinal development. MAG staining in Müller cells appears after 13 weeks and increases significantly by 23 weeks of gestation.
Area of Science:
- Neuroscience
- Developmental Biology
- Ophthalmology
Background:
- Müller cells are the principal glial cells of the vertebrate retina.
- Myelin-associated glycoprotein (MAG) is a key component of myelin sheaths.
- The role of MAG in retinal development is not fully understood.
Purpose of the Study:
- To investigate the temporal and spatial expression of myelin-associated glycoprotein (MAG) in Müller cells during human retinal development.
Main Methods:
- Immunohistochemistry using rat monoclonal antibodies to MAG.
- Peroxidase antiperoxidase (PAP) staining method.
- Analysis of human retinas from 9 to 31 gestational weeks.
Main Results:
- No MAG staining was observed in Müller cells of retinas between 9-12 gestational weeks.
- Faint MAG staining appeared in Müller cells around 13-16 gestational weeks, primarily in the inner retina and near the optic nerve head.
- After midterm, Müller cells consistently stained for MAG throughout all retinal layers, with gradually increasing intensity up to 23 gestational weeks.
Conclusions:
- Myelin-associated glycoprotein (MAG) is expressed in human Müller cells during the second trimester of gestation.
- MAG expression in Müller cells follows a specific developmental timeline, increasing significantly by mid-gestation.