Optic Nerve and Retinal Degeneration in DBA/2J Mice
Author Information
Author(s): Cassandra L. Schlamp, Li Yan, Joel A. Dietz, Katherine T. Janssen, Robert W. Nickells
Primary Institution: University of Wisconsin, Madison, WI, USA
Hypothesis
The initial damage in DBA/2J mice with glaucoma occurs in the optic nerve before retinal degeneration.
Conclusion
The study found that optic nerve degeneration precedes retinal ganglion cell loss in DBA/2J mice.
Supporting Evidence
- Optic nerve degeneration starts between 8 and 9 months of age.
- Ganglion cell loss is evident in most mice older than 10.5 months.
- Asymmetry in disease progression was observed between the eyes of individual mice.
Takeaway
This study shows that in certain mice, the optic nerve gets hurt before the retina does, which helps us understand glaucoma better.
Methodology
The study used DiI labeling for optic nerves and βGeo reporter gene expression for ganglion cell loss in aging DBA/2J mice.
Potential Biases
Potential bias in scoring due to subjective evaluation by observers.
Limitations
The study used two separate cohorts for optic nerve and retinal evaluations, which may affect the comparison of degeneration timing.
Participant Demographics
DBA/2J mice aged between 6 and 22.5 months.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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