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Glial fibrillary acidic protein expression in the developing human retina
M M Karim1, K Fujisawa, N Kanomata
1Department of Ophthalmology, Kobe University School of Medicine.
The Kobe Journal of Medical Sciences
|April 1, 1996
Summary
Glial fibrillary acidic protein (GFAP) positive cells emerge in the human retina near the optic disc around 24 gestational weeks. These astrocyte-specific cells progressively expand their presence across the retina during development.
Area of Science:
- Neuroscience
- Developmental Biology
- Ophthalmology
Background:
- Glial fibrillary acidic protein (GFAP) is a key intermediate filament protein specific to astrocytes.
- Understanding astrocyte development is crucial for comprehending retinal structure and function.
Purpose of the Study:
- To investigate the spatiotemporal expression of GFAP in the developing human retina.
- To characterize the morphology and distribution of GFAP-positive cells during human retinal development.
Main Methods:
- Immunohistochemical analysis using an anti-GFAP antibody.
- Microscopic examination of human retinal tissue at various gestational ages.
Main Results:
- GFAP-positive cells were first detected at 24 gestational weeks (GW) near the optic disc.
- These cells expanded to cover larger retinal areas in subsequent weeks.
- Distinct populations of GFAP-positive cells, including perivascular glia and Müller cell end-feet, were identified at different developmental stages.
Conclusions:
- GFAP expression in the human retina initiates around 24 GW.
- Astrocyte development, marked by GFAP expression, follows a specific pattern originating near the optic disc and spreading throughout the retina.
- The study provides insights into the developmental timeline of astrocytes in the human retina.