International Journal For Multidisciplinary Research

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Nutritional Signaling Pathways in Retinal Health: A Preventive Approach to Diabetic Retinopathy

Author(s) Dr Deepshikha ., Dr Ayub Ali
Country India
Abstract Abstract:
Background:
Diabetic retinopathy (DR) is a major microvascular complication of diabetes mellitus, leading to progressive vision loss. Hyperglycemia induces oxidative stress, inflammation, and endothelial dysfunction, which disrupt retinal homeostasis. Nutritional interventions targeting retinal signaling pathways offer potential preventive strategies, yet their mechanistic effects remain underexplored.
Objective:
To investigate the effects of key nutrients—polyphenols, omega-3 fatty acids, carotenoids, and vitamins—on retinal cellular health and signaling pathways implicated in the pathogenesis of DR.
Design:
Experimental-analytical study combining in vitro human retinal endothelial cell (HREC) assays and computational modelling to evaluate nutrient-mediated modulation of oxidative stress, inflammation, angiogenesis, and cell survival pathways.
Participants / Materials:
The study involved 600 diabetic and pre-diabetic patients recruited from Asim Eye Care, Delhi-NCR, after ophthalmic screening and clinical evaluation. Primary human retinal endothelial cells (HRECs) were also cultured under normoglycemic (5 mM) and hyperglycemic (25 mM) conditions to simulate diabetic stress.
Intervention:
Cells were treated with physiologically relevant concentrations of polyphenols (quercetin, resveratrol), omega-3 fatty acids (DHA), carotenoids (lutein, zeaxanthin), and vitamins (C, E, D) individually and in combination for 48–72 hours.
Outcomes:
Primary outcomes included cell viability, ROS levels, VEGF expression, inflammatory cytokine levels (TNF-α, IL-6), and activation of key signaling pathways (AMPK, PI3K/Akt, NF-κB, Nrf2). Computational modelling assessed nutrient–pathway interactions.

Results:
Nutrient treatment significantly improved HREC viability, reduced ROS production by 35–50%, suppressed NF-κB-mediated inflammation, and downregulated VEGF expression compared to hyperglycemic controls (p < 0.01). Activation of AMPK, PI3K/Akt, and Nrf2 pathways was observed, enhancing cell survival and antioxidant responses. Combined nutrient treatment demonstrated synergistic effects, providing superior retinal protection. Clinically, patients following nutrient-enriched dietary regimens showed better retinal health indices than controls.
Conclusions:
Nutritional modulation of retinal signaling pathways offers a promising preventive strategy for DR. Polyphenols, omega-3 fatty acids, carotenoids, and vitamins regulate oxidative stress, inflammation, and angiogenesis, enhancing retinal cell survival. Integrating targeted dietary interventions with conventional therapies may reduce DR progression and preserve visual function in diabetic populations.
Keywords Diabetic retinopathy, Nutritional signaling, Retinal health, Polyphenols, Omega-3 fatty acids, Oxidative stress, AMPK pathway, VEGF modulation
Published In Volume 7, Issue 5, September-October 2025
Published On 2025-10-18
DOI https://doi.org/10.36948/ijfmr.2025.v07i05.58351
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