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Abstract Title:

Naringenin neutralises oxidative stress and nerve growth factor discrepancy in experimental diabetic neuropathy.

Abstract Source:

Neurol Res. 2015 Oct ;37(10):924-33. Epub 2015 Jul 17. PMID: 26187552

Abstract Author(s):

Salim S Al-Rejaie, Abdulaziz M Aleisa, Hatem M Abuohashish, Mihir Y Parmar, Mohammad S Ola, Abdulaziz A Al-Hosaini, Mohammed M Ahmed

Article Affiliation:

Salim S Al-Rejaie

Abstract:

OBJECTIVES: Present study aims to investigate the ameliorative effects of naringenin (NG) on experimentally induced diabetic neuropathy (DN) in rats.

METHODS: Diabetes was induced by single intraperitoneal injection of streptozotocin (STZ, 60 mg/kg). Naringenin (25 and 50 mg/kg/day) treatment was started 2 weeks after the diabetes induction and continued for five consecutive weeks. Pain threshold behaviour tests were performed at the end of the treatment. Serum levels of glucose, insulin and pro-inflammatory cytokines were assessed. In sciatic tissues, markers oxidative stress, cytokines and neurotrophic factors were measured.

RESULTS: NG treatments showed significant decrease in paw-withdrawal (P < 0.01) and tail-flick latency (P < 0.01). The drug attenuated the diabetic-induced changes in serum glucose, insulin and pro-inflammatory cytokines including tumour necrosis factor-alpha (TNF-alpha), interleukin-1beta (IL-1beta) and interleukin-6 (IL-6). In sciatic nerve, the diabetic-induced alterations in interleukins and oxidative stress biomarkers were significantly attenuated by NG. Decreased sciatic expressions of insulin growth factor (IGF) and nerve growth factor (NGF) in diabetic rats were also ameliorated by NG. Diabetes-induced dysregulated levels of nitric oxide (NO), thiobarbituric acid reactive substances (TBARS), reduced glutathione (GSH), activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) and glutathione reductase (GR) were ameliorated by NG. Histological analysis showed that NG corrected the altered sciatic changes in diabetic animals.

DISCUSSION: We suggest that neuro-protective effect of NG molecules in sciatic nerve of diabetic rats, through its anti-diabetic as well as antioxidant and anti-inflammatory properties.

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Sayer Ji
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