Polyethylene glycol induced mouse model of retinal degeneration

Autor: Nalini S. Bora, Valeriy V. Lyzogubov, Puran S. Bora, Ruslana Tytarenko
Rok vydání: 2014
Předmět:
Male
Retinal degeneration
Time Factors
genetic structures
Apoptosis
Retinal Pigment Epithelium
Polyethylene glycol
Biology
Aminopeptidases
Polyethylene Glycols
Mice
Cellular and Molecular Neuroscience
chemistry.chemical_compound
Geographic Atrophy
PEG ratio
Autophagy
In Situ Nick-End Labeling
medicine
Animals
Outer nuclear layer
Retina
Retinal pigment epithelium
Dose-Response Relationship
Drug
Serine Endopeptidases
Complement C3
High-Temperature Requirement A Serine Peptidase 1
Anatomy
Macular degeneration
medicine.disease
Molecular biology
eye diseases
Sensory Systems
Mice
Inbred C57BL
Disease Models
Animal
Ophthalmology
medicine.anatomical_structure
Gene Expression Regulation
Matrix Metalloproteinase 9
chemistry
sense organs
Injections
Intraocular
Complement C1 Inhibitor Protein
Photoreceptor Cells
Vertebrate
Zdroj: Experimental Eye Research. 127:143-152
ISSN: 0014-4835
DOI: 10.1016/j.exer.2014.07.021
Popis: Age-related macular degeneration (AMD) is a leading cause of irreversible blindness. This study was done to characterize dry AMD-like changes in mouse retinal pigment epithelium (RPE) and retina after polyethylene glycol (PEG) treatment. We injected male C57BL/6 mice subretinally with PBS, 0.025, 0.25, 0.5 and 1.0 mg of PEG-400 and the animals were sacrificed on day 5. Eyes were harvested and processed for histological analysis. In all other experiments 0.5 mg PEG was injected and animals were sacrificed on days 1, 3, 5 or 14. Paraffin, 5 μm and plastic, 1 μm and 80 nm sections were used for further analysis. Subretinal injection of 0.5 mg PEG induced a 32% reduction of outer nuclear layer (ONL) thickness, 61% decrease of photoreceptor outer and inner segment length, 49% decrease of nuclear density in the ONL and 31% increase of RPE cell density by day 5 after injection. The maximum level of TUNEL positive nuclei in the ONL (6.8 + 1.99%) was detected at day 5 after PEG injection and co-localized with Casp3act. Histological signs of apoptosis were observed in the ONL by light or electron microscopy. Degeneration of RPE cells was found in PEG injected eyes. Gene expression data identified several genes reported to be involved in human AMD. C3, Cfi, Serping1, Mmp9, Htra1 and Lpl were up-regulated in PEG injected eyes compared to PBS controls. PEG leads to morphological and gene expression changes in RPE and retina consistent with dry AMD. This model will be useful to investigate dry AMD pathogenesis and treatment.
Databáze: OpenAIRE
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