Abstract
We investigated the effect of an ethanol extract of Lygodii spora (LS) as a preventive and therapeutic agent for experimentally induced calcium oxalate nephrolithiasis with ethylene glycol (EG) in rats. Male Wistar rats were randomly divided into preventive (n = 18, for 28 days) and therapeutic (n = 24, for 42 days) groups. The preventive group was further subdivided into three groups of six rats each: preventive control, preventive lithiatic control (EG) and preventive lithiatic LS (EG + 400 mg/kg LS). Similarly, the therapeutic group was subdivided into four groups of six rats each: therapeutic control, therapeutic lithiatic control, therapeutic lithiatic untreated, and therapeutic lithiatic LS. Lithiasis was induced by adding 0.75 % EG to the drinking water of all groups except the preventive and therapeutic control groups. Preventive and therapeutic subjects also received the LS ethanol extract in drinking water at a dose of 400 mg/kg, since day 0 or day 28, respectively. At the end of the each experimental period, various biochemical parameters were measured in urine and kidney homogenates. The kidneys were subjected to histopathological analysis. The results revealed that treatment with the LS preventive protocol significantly decreased the levels of urinary calcium, oxalate and uric acid, and increased the levels of urinary citrate as compared to those in the EG control. No significant changes in the urinary parameters except oxalate and citrate levels were observed in the rats in the therapeutic protocol. In both preventive and therapeutic protocols, the extract significantly decreased kidney peroxides, renal calcium, oxalate content, and the number of kidney oxalate deposits as compared to those in the EG group. We conclude that LS is useful as a preventive and therapeutic agent against the formation of oxalate kidney stones.
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This work was supported by a Grant from the Next-Generation Biogreen 21 Program (no. PJ009546), Rural Development Administration, Republic of Korea.
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Cho, H.J., Bae, W.J., Kim, S.J. et al. The inhibitory effect of an ethanol extract of the spores of Lygodium japonicum on ethylene glycol-induced kidney calculi in rats. Urolithiasis 42, 309–315 (2014). https://doi.org/10.1007/s00240-014-0674-z
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DOI: https://doi.org/10.1007/s00240-014-0674-z