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Spatiotemporal expression of CD15 in the developing chick retina
C Andressen1, K Moertter, J K Mai
1Institute of Neuroanatomy, Heinrich Heine University, Düsseldorf, Germany.
Brain Research. Developmental Brain Research
|September 2, 1996
Summary
CD15 expression in the developing chick retina, particularly in amacrine, bipolar, and ganglion cells, follows a specific spatiotemporal pattern. This pattern correlates with the establishment of synaptic connections, revealing key developmental insights.
Area of Science:
- Neuroscience
- Developmental Biology
- Glycobiology
Background:
- The carbohydrate epitope CD15 plays a role in cellular differentiation and recognition.
- Understanding the spatiotemporal expression of CD15 is crucial for elucidating retinal development.
Purpose of the Study:
- To investigate the spatiotemporal distribution of CD15 in the developing chick retina.
- To correlate CD15 expression patterns with the differentiation of retinal cell types and synaptic development.
Main Methods:
- Immunohistochemistry was used to visualize CD15 expression in retinal sections.
- Western blotting was employed to identify CD15-positive glycoproteins.
Main Results:
- CD15 expression initiated at embryonic day 13 (E13) in the inner nuclear layer (INL) and ganglion cell layer (GCL).
- Stratified amacrine cells showed increasing CD15 expression from E13-E16, with diffuse subtypes appearing at E15.
- Three types of CD15-positive ganglion cells were identified by E15, and an adult-like pattern was established by E19.
- CD15-positive glycoproteins (20, 32, 34 kDa) were detected from E16 to postnatal day 5 (P5).
Conclusions:
- The spatiotemporal expression of CD15 in the chick retina is linked to the maturation of amacrine, bipolar, and ganglion cells.
- CD15 expression patterns correlate with the formation of synaptic contacts during retinal development.
- CD15 serves as a valuable marker for studying cellular differentiation and circuit formation in the developing visual system.