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Targeting Netrin-1 and -4 as a Novel Diagnostic Parameter and Treatment Option for Diabetic Retinopathy
Kaleab Alemayehu Zewdie1, Muluken Altaye Ayza1, Bekalu Amare Tesfaye1
1Department of Pharmacology and Toxicology, School of Pharmacy, Mekelle University, Mekelle, Ethiopia.
Abstract:
Diabetic retinopathy (DR) is a retinal vascular disorder associated with both type 1 and type 2 diabetes mellitus (DM). It is characterized by specific loss of pericytes, which leads to an augmented blood vessel permeability, and development of new blood vessels (retinal neovascularization). Moreover, stiffening of eye membrane, inflammation, and apoptosis of endothelial cells also lead to damage of the blood-retinal barrier and blindness in most cases unless it's detected and managed early. Hence, this review was intended to assess the potential roles of Netrin-1 and -4 as new/alternative biomarkers and therapeutic options for DR. Netrin-1 and -4 have been the most known ligands and are well known for their role in neural guidance. DR has both neural and vascular components; therefore, biomarkers used for both neural and vascular retinal tissues are potentially important. According to different experimental and clinical studies, as compared to the normal groups, there was a significant increment in both retinal Netrin-1 and -4 mRNA and protein levels in the retinopathy groups. In addition, exogenous supplementation of these proteins is also used as a therapeutic agent for DR.
Insights
Netrin-1 and Netrin-4 show promise as novel biomarkers and treatments for diabetic retinopathy (DR). Elevated levels in retinal tissues suggest their role in DR progression and potential therapeutic applications.
Area of Science:
- Ophthalmology
- Endocrinology
- Molecular Biology
Background:
- Diabetic retinopathy (DR) is a complication of diabetes mellitus (DM) affecting retinal vasculature.
- DR involves pericyte loss, increased vascular permeability, neovascularization, and blood-retinal barrier damage, potentially leading to blindness.
- Current management relies on early detection and intervention.
Purpose of the Study:
- To evaluate Netrin-1 and Netrin-4 as potential biomarkers for diabetic retinopathy (DR).
- To explore the therapeutic potential of Netrin-1 and Netrin-4 in managing DR.
- To investigate the role of these proteins in neural and vascular retinal tissues affected by DR.
Main Methods:
- Review of experimental and clinical studies on Netrin-1 and Netrin-4 in DR.
- Analysis of mRNA and protein expression levels of Netrin-1 and Netrin-4 in retinal tissues.
- Assessment of the effects of exogenous Netrin-1 and Netrin-4 supplementation.
Main Results:
- Retinal Netrin-1 and Netrin-4 mRNA and protein levels were significantly elevated in DR groups compared to normal controls.
- Netrin-1 and Netrin-4, known neural guidance ligands, are implicated in DR's neural and vascular pathology.
- Exogenous supplementation of Netrin-1 and Netrin-4 demonstrated therapeutic effects in DR models.
Conclusions:
- Netrin-1 and Netrin-4 are promising biomarkers for diabetic retinopathy.
- These proteins represent potential novel therapeutic targets for DR treatment.
- Further research into Netrin-1 and Netrin-4 could lead to improved DR management strategies.
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