Vol 4 No 2 (2018): Current Issue
Research Article

Sacran, a High-molecular Weight Polysaccharide Inhibits Renal Injury and Oxidative Stress in Chronic Renal Failure Model Rats

Goto M
Faculty of Pharmaceutical Sciences, Sojo University, Japan
Iohara D
DDS Research Institute, Sojo University, Japan
Kaneko S
Green Science Material, Japan
Higashi T
Graduate School of Pharmaceutical Sciences, Kumamoto University, Japan
Motoyama K
Graduate School of Pharmaceutical Sciences, Kumamoto University, Japan
Arima H
Graduate School of Pharmaceutical Sciences, Kumamoto University, Japan
Maruyama T
Graduate School of Pharmaceutical Sciences, Kumamoto University, Japan
Uekama K
Faculty of Pharmaceutical Sciences, Sojo University, Japan
Hirayama F
DDS Research Institute, Sojo University, Japan
Otagiri M
DDS Research Institute, Sojo University, Japan
Anraku M
Faculty of Pharmaceutical Sciences, Sojo University, Japan
Published November 30, 2018
Keywords
  • Sacran,
  • Antioxidant,
  • Renal failure,
  • Oxidative stress,
  • Adsorption,
  • Anti-inflammation
  • ...More
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Abstract

The administration of a high-molecular polysaccharide Sacran results in a significant decrease in renal injury and oxidative stress, compared with that for the oral carbonaceous adsorbent, AST-120 (Kremezin®) or a non-treatment group in 5/6 nephrectomized rats. An oral administration of Sacran (20 mg/day) over a 4 week period resulted in a significant decrease in serum indoxyl sulfate, creatinine and urea nitrogen levels, compared with a similar treatment with AST-120 or the non-treatment group. Sacran treatment also resulted in antioxidant potential being maintained, compared with that for AST-120 or the non-treatment group. Immuno-histochemical analyses also demonstrated that CRF rats, when treated with Sacran, showed a decrease in the level of accumulated renal fibrosis and 8-OHdG compared with AST-120 or the non-treatment group. These results suggest that the ingestion of Sacran results in a significant reduction in the levels of prooxidants, such as uremic toxins, in the gastrointestinal tract, thereby inhibiting the subsequent development of oxidative stress in the systemic circulation.