Related Experiment Videos
Immortalized retinal neurons derived from SV40 T-antigen-induced tumors in transgenic mice
J P Hammang1, E E Baetge, R R Behringer
1Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison 53706.
Abstract:
Immortalized retinal neurons have been established in tissue culture from retinal tumors arising in transgenic mice. The mice carry the SV40 T-antigen under the control of 5' flanking sequences from the human phenylethanolamine N-methyltransferase (PNMT) gene in order to target oncogene expression to adrenergic cell types. The retinal cultures contain a proliferation population of T-antigen-positive cells with a neuronal morphology that includes formation of extensive neuritic processes. We identified the cells as amacrine-derived neurons by immunofluorescence using the cell-specific monoclonal antibodies VC1.1 and HPC-1. The cells also express all three neurofilament subunits and GAP-43. These results indicate that CNS neurons can be transformed in transgenic animals to generate cultured cells with many properties of mature neurons.
Insights
Researchers created immortalized retinal neurons from mouse tumors using genetic engineering. These cultured neurons exhibit mature neuronal characteristics, offering a new model for studying retinal cell biology.
Area of Science:
- Neuroscience
- Genetics
- Cell Biology
Background:
- Immortalized cell lines are crucial for studying neuronal function.
- Developing models for specific retinal neuron subtypes remains challenging.
Purpose of the Study:
- To establish a stable in vitro model of immortalized retinal neurons.
- To characterize the properties of these cultured neurons for research applications.
Main Methods:
- Utilized transgenic mice carrying the SV40 T-antigen under the PNMT gene promoter.
- Established tissue cultures from retinal tumors.
- Employed immunofluorescence with monoclonal antibodies (VC1.1, HPC-1) for cell identification.
- Analyzed expression of neurofilament subunits and GAP-43.
Main Results:
- Successfully generated immortalized retinal neuron cultures from transgenic mouse tumors.
- Identified the cultured cells as amacrine-derived neurons.
- Observed neuronal morphology with extensive neuritic processes.
- Confirmed expression of neurofilament subunits and GAP-43.
Conclusions:
- Transgenic animals can be used to generate immortalized CNS neurons in culture.
- These cultured neurons possess characteristics of mature neurons, suitable for research.
- This model provides a valuable tool for investigating retinal neuron biology and function.