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Naringin Protects Pancreatic beta-Cells Against Oxidative Stress-Induced Apoptosis by Inhibiting Both Intrinsic and Extrinsic Pathways in Insulin-Deficient Diabetic Mice

Authors
Lim, Ye JinKim, Jung HoPan, Jeong HoonKim, Jae KyeomPark, Tae-SikKim, Young JunLee, Jin HyupKim, Jun Ho
Issue Date
3월-2018
Publisher
WILEY
Keywords
apoptosis; diabetes; naringin; oxidative stress; pancreatic beta-cells
Citation
MOLECULAR NUTRITION & FOOD RESEARCH, v.62, no.5
Indexed
SCIE
SCOPUS
Journal Title
MOLECULAR NUTRITION & FOOD RESEARCH
Volume
62
Number
5
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/76845
DOI
10.1002/mnfr.201700810
ISSN
1613-4125
Abstract
Scope: Oxidative stress has been suggested to play a central role in the pathogenesis of diabetes, as well as other metabolic disorders. Naringin, a major flavanone glycoside in citrus species, has been shown to display strong antioxidant potential in in vitro and in vivo models of oxidative stress; however, the underlying protective mechanisms in diabetes are unclear. Methods and results: To study the protective effects and molecular mechanisms of naringin in preventing islet dysfunction and diabetes, we examined glucose homeostasis, beta-cell apoptosis, and inflammatory response in insulin-deficient diabetic mice exposed to acute oxidative stress with streptozotocin (STZ). Naringin dose-dependently ameliorated hyperglycemia and islet dysfunction in insulin-deficient diabetic mice. Naringin counteracted STZ-induced beta-cell apoptosis by inhibiting both the intrinsic (mitochondria-mediated) and extrinsic (death receptor-mediated) pathways. Furthermore, these protective effects were associated with suppression of DNA damage response and nuclear factor-kappa B-and mitogen-activated protein kinase-mediated signaling pathways, as well as reduction of reactive oxygen species accumulation and pro-inflammatory cytokine production in the pancreas. Conclusion: Taken together, our study provides insights into the underlying mechanisms through which naringin protects the pancreatic beta-cells against oxidative stress-induced apoptosis.
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