Effects of Fructose and Stress on Rat Renal Copper Metabolism and Antioxidant Enzymes Function
2022
Authors:
Tasić, DanicaOpačić, Miloš
Kovačević, Sanja
Nikolić-Kokić, Aleksandra
Dimitrijević, Milena
Nikolić, Dušan
Vojnović-Milutinović, Danijela
Blagojević, Duško
Đorđević, Ana
Brkljačić, Jelena
Document Type:
Article (Published version)
Metadata
Show full item recordAbstract:
The effects of a fructose-rich diet and chronic stress on copper metabolism in the kidneys
are still understudied. We investigated whether fructose and/or chronic unpredictable stress modulate
copper metabolism in a way that affects redox homeostasis, thus contributing to progression
of metabolic disturbances in the kidney. We determined protein level of copper transporters,
chaperones, and cuproenzymes including cytochrome c oxidase, as well as antioxidant enzymes
function in the kidneys of male Wistar rats subjected to 20% liquid fructose supplementation
and/or chronic stress. Liquid fructose supplementation increased level of copper chaperone of
superoxide dismutase and decreased metallothionein level, while rendering the level of copper
importer and copper chaperones involved in copper delivery to mitochondria and trans Golgi
network unaffected. Stress had no effect on renal copper metabolism. The activity and expression
of renal antioxidant enzymes remained unaltered in all experimental groups. In conclusion, fructose,
independently of stress, decreased renal copper level, and modulated renal copper metabolism
as to preserve vital cellular function including mitochondrial energy production and antioxidative
defense, at the expense of intracellular copper storage.
Keywords:
fructose-fed rat; kidney; copper transporter; copper chaperone of superoxide dismutase; oxidative stressSource:
International Journal of Molecular Sciences, 2022, 23, 16, 9023-Funding / projects:
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200007 (University of Belgrade, Institute for Biological Research 'Siniša Stanković') (RS-MESTD-inst-2020-200007)
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200053 (University of Belgrade, Institute for Multidisciplinary Research) (RS-MESTD-inst-2020-200053)
DOI: 10.3390/ijms23169023
ISSN: 1422-0067
PubMed: 36012287