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Updated: Aug 4, 2026
Organotypic Culture of Adult Rabbit Retina
Published on: April 29, 2007
Antigenic changes of rabbit retinal Müller cells in culture
G S McGillem1, C Guidry, R F Dacheux
1Eye Foundation Hospital, Department of Ophthalmology, University of Alabama at Birmingham, 35233, USA.
Purpose:
To determine whether dissociated and cultured Müller cells from the avascular rabbit retina undergo the same phenotypic changes as Müller cells that are dissociated and cultured from a vascular retina.
Methods:
Müller cells were dissociated from adult rabbit retinas by using an enzymatic digestion-mechanical trituration technique and a cell attachment method that provided Müller cell- enriched cell cultures. Indirect immunofluorescence localization of vimentin, glial fibrillary acidic protein (GFAP), glutamine synthetase (GS), beta-amyloid precursor protein (beta-APP), and (alpha-smooth muscle actin (alpha-SMA) was carried out on Müller cells that were freshly dissociated, on those that had been in culture 2 and 6 days, and on confluent primary cultures and late-passage cultures. The specificity of the antibodies and changes in protein expression were examined by western blot analysis.
Results:
The expression of vimentin, GFAP, GS, and beta-APP was present 2 days after dissociation and was retained through 6 days in culture, at which time alpha-SMA began to be expressed in a small number of cells. The confluent, primary cultures no longer expressed GS, but vimentin and beta-APP were still expressed, and the expression of alpha-SMA was increased. During the late-passage stage, the morphologic appearance of the Müller cell cultures was large and amorphous, with additional changes in antigenicity. Although there was loss of expression of the intermediate filament proteins GFAP and vimentin, the expression of beta-APP was maintained, whereas alpha-SMA was increased and appeared to be a major cytoskeletal protein.
Conclusions:
Dissociated Müller cells that were maintained in culture underwent phenotypic changes that included a large, amorphous appearance; the loss of detectable vimentin, GFAP, and GS expression; the persistent presence of beta-APP; and the de novo appearance of alpha-SMA. The phenotypic and antigenic changes that occurred in cultured Müller cells from an avascular retina were similar but not identical to the changes observed in cultured Müller cells from a vascular retina.
Insights
Cultured Müller cells from avascular rabbit retinas show phenotypic changes, including altered protein expression and morphology. These changes in glial cells are similar, but not identical, to those observed in vascular retinas.
Area of Science:
- Retinal biology
- Glial cell research
- Cellular differentiation
Background:
- Müller cells are crucial glial cells in the retina.
- Understanding Müller cell behavior in culture is vital for retinal research.
- Phenotypic changes in cultured Müller cells from vascular retinas are documented.
Purpose of the Study:
- To compare phenotypic changes in cultured Müller cells from avascular versus vascular rabbit retinas.
- To investigate the expression of key proteins (vimentin, GFAP, GS, beta-APP, alpha-SMA) in cultured Müller cells.
- To assess morphological and antigenic alterations during Müller cell culture.
Main Methods:
- Dissociation of Müller cells from adult rabbit retinas using enzymatic and mechanical methods.
- Culture of Müller cells and analysis of protein expression via indirect immunofluorescence and western blot.
- Evaluation of cells at different time points (freshly dissociated, 2, 6 days in culture, confluent, late-passage).
Main Results:
- Vimentin, GFAP, GS, and beta-APP were expressed early in culture.
- Alpha-SMA expression began by day 6 and increased in later passages.
- Confluent and late-passage cultures showed loss of GS and GFAP, maintained beta-APP, and increased alpha-SMA.
Conclusions:
- Dissociated Müller cells undergo significant phenotypic changes in culture.
- These changes include altered morphology, loss of specific protein expression, and de novo protein appearance.
- The observed changes in avascular retinal Müller cells are comparable but not identical to those in vascular retinal Müller cells.
