Neuroprotective Effects of Voluntary Exercise in an Inherited Retinal Degeneration Mouse Model.
Invest Ophthalmol Vis Sci
; 56(11): 6839-46, 2015 Oct.
Article
en En
| MEDLINE
| ID: mdl-26567796
ABSTRACT
PURPOSE:
Our previous investigations showed that involuntary treadmill exercise is neuroprotective in a light-induced retinal degeneration mouse model, and it may act through activation of tropomyosin-related kinase B (TrkB) receptors. This study investigated whether voluntary running wheel exercise can be neuroprotective in an inheritable model of the retinal degenerative disease retinitis pigmentosa (RP), rd10 mice.METHODS:
Breeding pairs of rd10 and C57BL/6J mice were given free-spinning (active) or locked (inactive) running wheels. Pups were weaned into separate cages with their parents' respective wheel types, and visual function was tested with ERG and a virtual optokinetic system at 4, 5, and 6 weeks of age. Offspring were killed at 6 weeks of age and retinal cross-sections were prepared for photoreceptor nuclei counting. Additionally, separate cohorts of active and inactive rd10 pups were injected daily for 14 days after eye opening with a selective TrkB receptor antagonist (ANA-12) or vehicle solution and assessed as described above.RESULTS:
Mice in the rd10 active group exhibited significant preservation of visual acuity, cone nuclei, and total photoreceptor nuclei number. Injection with ANA-12 precluded the preservation of visual acuity and photoreceptor nuclei number in rd10 mice.CONCLUSIONS:
Voluntary running partially protected against the retinal degeneration and vision loss that otherwise occurs in the rd10 mouse model of RP. This protection was prevented by injection of ANA-12, suggesting that TrkB activation mediates exercise's preservation of the retina. Exercise may serve as an effective, clinically translational intervention against retinal degeneration.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Condicionamiento Físico Animal
/
Retinitis Pigmentosa
/
Receptor trkB
/
Neuroprotección
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
Invest Ophthalmol Vis Sci
Año:
2015
Tipo del documento:
Article
País de afiliación:
Estados Unidos