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Updated: Mar 13, 2026
Primary Cell Cultures to Study the Regeneration Potential of Murine Müller Glia after MicroRNA Treatment
Published on: March 28, 2022
The microRNA expression profile of mouse Müller glia in vivo and in vitro
Stefanie G Wohl1, Thomas A Reh1
1Department of Biological Structure, University of Washington, School of Medicine, Seattle, WA, USA.
Abstract:
The profile of miRNAs in mature glia is not well characterized, and most studies have been done in cultured glia. In order to identify the miRNAs in adult and young (postnatal day 11/12) Müller glia of the neural retina, we isolated the Müller glia from Rlbp-CreER: Stopf/f-tdTomato mice by means of fluorescent activated cell sorting and analyzed their miRNAs using NanoStrings Technologies®. In freshly isolated adult Müller glia, we identified 7 miRNAs with high expression levels in the glia, but very low levels in the retinal neurons. These include miR-204, miR-9, and miR-125-5p. We also found 15 miRNAs with high levels of expression in both neurons and glia, and many miRNAs that were enriched in neurons and expressed at lower levels in Müller glia, such as miR-124. We next compared miRNA expression of acutely isolated Müller glia with those that were maintained in dissociated culture for 8 and 14 days. We found that most miRNAs declined in vitro. Interestingly, some miRNAs that were not highly expressed in adult Müller glia increased in cultured cells. Our results thus show the miRNA profile of adult Müller glia and the effects of cell culture on their levels.
Insights
We identified specific microRNAs (miRNAs) in adult Müller glia, crucial retinal cells. Cell culture significantly altered miRNA levels, highlighting the importance of studying freshly isolated cells for accurate glial miRNA profiling.
Area of Science:
- Neuroscience
- Molecular Biology
- Ophthalmology
Background:
- MicroRNA (miRNA) profiles in mature Müller glia are poorly understood.
- Most existing studies rely on cultured glial cells, which may not reflect in vivo conditions.
Purpose of the Study:
- To characterize the miRNA profile of adult and young Müller glia from the neural retina.
- To investigate the impact of cell culture on Müller glia miRNA expression.
Main Methods:
- Isolation of Müller glia from Rlbp-CreER: Stopf/f-tdTomato mice using fluorescence-activated cell sorting.
- Analysis of miRNA expression using NanoString Technologies.
- Comparison of miRNA profiles between acutely isolated glia and those cultured for 8 and 14 days.
Main Results:
- Identified 7 highly expressed miRNAs in adult Müller glia with low neuronal expression (e.g., miR-204, miR-9, miR-125-5p).
- Found 15 miRNAs highly expressed in both neurons and glia.
- Observed a general decline in most miRNAs during in vitro culture, with some showing increased expression in culture.
Conclusions:
- Established the miRNA expression profile of adult Müller glia.
- Demonstrated significant alterations in miRNA levels due to cell culture, emphasizing the need for in vivo validation.
