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Vasoactive intestinal peptide, a promising agent for myopia?
Ayse Idil Cakmak1, Hikmet Basmak1, Huseyin Gursoy1
1Department of Ophthalmology, Eskisehir Osmangazi University Medical Faculty, Eskisehir 26180, Turkey.
International Journal of Ophthalmology
|March 3, 2017
Summary
Vasoactive intestinal peptide (VIP) may inhibit form-deprivation myopia (FDM) development. Studies show VIP treatment reduced refractive error and axial length in chicks, suggesting a therapeutic role.
Area of Science:
- Ophthalmology
- Neuroscience
- Molecular Biology
Background:
- Form-deprivation myopia (FDM) is a significant visual impairment.
- The neuropeptide vasoactive intestinal peptide (VIP) plays roles in various physiological processes.
- Understanding myopia's molecular mechanisms is crucial for developing effective treatments.
Purpose of the Study:
- To investigate the potential role of vasoactive intestinal peptide (VIP) in the development of form-deprivation myopia (FDM).
- To assess the impact of VIP intravitreal injections on refractive error and axial length in an animal model of myopia.
- To analyze the expression of VIP receptors and ZENK protein in response to FDM and VIP treatment.
Main Methods:
- Form-deprivation myopia (FDM) was induced in chicks using translucent diffusers.
- Intravitreal injections of saline (control) or VIP were administered daily to occluded eyes.
- Refraction, axial length, and retinal mRNA levels of VIP receptors and ZENK protein were measured using retinoscopy, PCR, and real-time PCR.
Main Results:
- VIP treatment significantly reduced refractive error and axial length elongation in chicks with FDM compared to controls (P<0.001).
- VIP administration led to a significant decrease in the expression of VIP2 receptors and ZENK protein in the retina (P=0.001).
- These findings suggest that VIP influences molecular pathways involved in myopia development.
Conclusions:
- Vasoactive intestinal peptide (VIP) demonstrates potential inhibitory effects on the development of form-deprivation myopia (FDM).
- VIP treatment may offer a novel therapeutic strategy for managing myopia.
- Further research is warranted to elucidate the precise mechanisms underlying VIP's protective role in myopia.
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