Context: This study aimed to evaluate the renoprotective action of linalool (LIN) on streptozotocin (STZ)-induced diabetic rats.
Objective: The pathological changes in diabetic nephropathy (DN) include oxidative stress, renal injury, matrix accumulation and podocyte abnormalities. We investigated the renoprotective actions of LIN, a monoterpene alcohol, present in herbal essential oils in STZ-induced diabetic rats with renal injury.
Materials And Methods: STZ-diabetic rats were administered LIN (25 mg/kg) for 45 days, after which the activities of key enzymes of glucose metabolism, collagen content, oxidative damage and expression of glucose transporter-1 (GLUT-1), transforming growth factor-β1 (TGF-β1), nuclear factor-κBp65 (NF-κB p65) and nephrin were analyzed.
Results: Diabetic rats displayed altered glucose metabolism, collagen accumulation and increased TGF-β1 and NF-κB expression in kidney. LIN treatment restored glucose-metabolizing enzymes, collagen content and GLUT-1 expression and also prevented nephrin loss. LIN also rescued kidney from oxidative stress and inflammation by decreasing the expression of TGF-β1 and NF-κB. Ultrastructural changes such as basement membrane thickening, reduction in podocyte number and loss of filtration barrier integrity in diabetic rats were mitigated by LIN.
Discussion And Conclusion: The results of this study suggest that LIN can attenuate nephropathic changes induced in kidney of diabetic rats. These findings highlight the utility of LIN as a potential drug to treat renal damage in diabetic subjects.
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