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Article Publish Status: FREE
Abstract Title:

Fructose-Rich Diet Affects Mitochondrial DNA Damage and Repair in Rats.

Abstract Source:

Nutrients. 2017 Mar 24 ;9(4). Epub 2017 Mar 24. PMID: 28338610

Abstract Author(s):

Federica Cioffi, Rosalba Senese, Pasquale Lasala, Angela Ziello, Arianna Mazzoli, Raffaella Crescenzo, Giovanna Liverini, Antonia Lanni, Fernando Goglia, Susanna Iossa

Article Affiliation:

Federica Cioffi

Abstract:

Evidence indicates that many forms of fructose-induced metabolic disturbance are associated with oxidative stress and mitochondrial dysfunction. Mitochondria are prominent targets of oxidative damage; however, it is not clear whether mitochondrial DNA (mtDNA) damage and/or its lack of repair are events involved in metabolic disease resulting from a fructose-rich diet. In the present study, we evaluated the degree of oxidative damage to liver mtDNA and its repair, in addition to the state of oxidative stress and antioxidant defense in the liver of rats fed a high-fructose diet. We used male rats feeding on a high-fructose or control diet for eight weeks. Our results showed an increase in mtDNA damage in the liver of rats fed a high-fructose diet and this damage, as evaluated by the expression of DNA polymeraseγ, was not repaired; in addition, the mtDNA copy number was found to be significantly reduced. A reduction in the mtDNA copy number is indicative of impaired mitochondrial biogenesis, as is the finding of a reduction in the expression of genes involved in mitochondrial biogenesis. In conclusion, afructose-rich diet leads to mitochondrial and mtDNA damage, which consequently may have a role in liver dysfunction and metabolic diseases.

Study Type : Animal Study

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