Related Experiment Video
Updated: Jul 11, 2026
13:56
Characterization of Molecular Mechanisms of In vivo UVR Induced Cataract
Published on: November 28, 2012
Visible light induces matrix metalloproteinase-9 expression in rat eye
Andrea M Papp1, Rita Nyilas, Zsuzsanna Szepesi
1Laboratory of Proteomics, Institute of Biology, Eötvös Loránd University, Budapest, Hungary.
Journal of Neurochemistry
|September 15, 2007
Summary
Matrix metalloproteinase-9 (MMP-9) is induced by light in the rat retina, suggesting a role in visual system plasticity. This is the first study showing MMP-9 induction by a sensory stimulus.
Area of Science:
- Neuroscience
- Ophthalmology
- Molecular Biology
Background:
- Matrix metalloproteinase-9 (MMP-9) is upregulated in the nervous system during excitotoxicity.
- MMP-9's induction by natural stimuli remains uncharacterized.
Purpose of the Study:
- To investigate MMP-9 induction by a sensory stimulus in the rat eye.
- To explore the role of MMP-9 in visual system plasticity and light adaptation.
Main Methods:
- Reverse transcription-polymerase chain reaction (RT-PCR) for transcriptional analysis.
- Gelatin-zymography for protein level assessment.
- Electroretinography (ERG) to evaluate retinal function.
- Pharmacological inhibition of MMPs using GM6001.
Main Results:
- White light overstimulation induced MMP-9 at both transcriptional and protein levels in the rat retina.
- MMP-9 elevation occurred without photoreceptor loss or significant anatomical changes.
- A transient decrease in ERG b-wave amplitude was observed, with GM6001 slowing recovery.
- Even room light induced retinal MMP-9 in dark-adapted animals.
Conclusions:
- Sensory stimuli, such as light, can induce MMP-9 in the retina.
- MMP-9 may play a physiological role in nervous system plasticity, including light adaptation.
- This study provides the first evidence of MMP-9 induction by a sensory stimulus.
