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Effects of omega-3 essential fatty acids against formaldehyde-induced nephropathy in rats
Ismail Zararsiz1, Mehmet Fatih Sonmez, H Ramazan Yilmaz
1Department of Anatomy, Faculty of Medicine, Firat University, Elazig, Turkey.
Abstract:
The aim of this study was to examine the toxicity of formaldehyde (FA) on the kidney and the protective effects of omega-3 essential fatty acids against these toxic effects. Twenty-one male Wistar rats were divided into three groups. Rats in Group I comprised the controls, while the rats in Group II were injected every other day with FA. Rats in Group III received omega-3 fatty acids daily while exposed to FA. At the end of the 14-day experimental period, all rats were killed by decapitation and the kidneys removed. Some of the kidney tissue specimens were used for determination of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) activities, and malondialdehyde (MDA) levels. The remaining kidney tissue specimens were used for light microscopic evaluation. The levels of SOD and GSH-Px were significantly decreased, and MDA levels were significantly increased in rats treated with FA compared with those of the controls. Furthermore, in the microscopic examination of this group, glomerular and tubular degeneration, vascular congestion and tubular dilatation were observed. However, increased SOD and GSH-Px enzyme activities, and decreased MDA levels were detected in the rats administered omega-3 fatty acids while exposed to FA. Additionally, kidney damage caused by FA was decreased and structural appearance was similar to that of the control rats in this group. In conclusion, it was determined that FA-induced kidney damage was prevented by administration of omega-3 essential fatty acids.
Insights
Formaldehyde (FA) causes kidney damage, evidenced by reduced antioxidant enzymes and increased lipid peroxidation. Omega-3 fatty acids protect against FA-induced kidney toxicity by restoring enzyme levels and reducing oxidative stress.
Area of Science:
- Toxicology
- Nephrology
- Biochemistry
Background:
- Formaldehyde (FA) exposure is a significant health concern.
- Kidney damage is a potential consequence of FA toxicity.
- Oxidative stress plays a role in FA-induced organ damage.
Purpose of the Study:
- To investigate the toxic effects of formaldehyde on kidney tissue.
- To evaluate the protective potential of omega-3 essential fatty acids against formaldehyde-induced nephrotoxicity.
Main Methods:
- Male Wistar rats were divided into control, formaldehyde-exposed, and formaldehyde plus omega-3 groups.
- Kidney tissue was analyzed for superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) activity, and malondialdehyde (MDA) levels.
- Histopathological examination of kidney tissue was performed using light microscopy.
Main Results:
- Formaldehyde exposure significantly decreased SOD and GSH-Px activities and increased MDA levels in rat kidneys.
- Histopathology revealed glomerular and tubular degeneration, vascular congestion, and tubular dilatation in formaldehyde-treated rats.
- Omega-3 fatty acid administration attenuated formaldehyde-induced oxidative stress, restoring enzyme activities and reducing MDA levels, with improved kidney structure.
Conclusions:
- Formaldehyde induces significant kidney damage through oxidative stress mechanisms.
- Omega-3 essential fatty acids demonstrate a protective effect against formaldehyde-induced nephrotoxicity.
- Omega-3 fatty acids may be a viable therapeutic strategy to mitigate formaldehyde-related kidney injury.
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