In vitro protection of biological macromolecules against oxidative stress and in vivo toxicity evaluation of Acacia nilotica (L.) and ethyl gallate in rats

BMC Complementary and Alternative Medicine

Joseph Arul²  Rajasekaran Chandrasekaran¹  Kalaivani Thiagarajan¹  Shalini Mohan¹ 

[1] School of Bio Sciences and Technology, VIT University, Vellore, Tamilnadu 632014, India;Department of Food Science and Nutrition, Laval University, Quebec, QC G1V 0A6, Canada

关键词: DNA interaction;    Toxicity;    Oxidative damage;    Antioxidant;    Ethyl gallate;    Acacia nilotica (L.);   

Others  :  1087251
DOI  :  10.1186/1472-6882-14-257

 received in 2014-05-05, accepted in 2014-07-15,  发布年份 2014

【 摘 要 】

Background

Recently, enormous research has been focused on natural bioactive compounds possessing potential antioxidant and anticancer properties using cell lines and animal models. Acacia nilotica (L.) is widely distributed in Asia, Africa, Australia and Kenya. The plant is traditionally used to treat mouth, ear and bone cancer. However, reports on Acacia nilotica (L.) Wild. Ex. Delile subsp. indica (Benth.) Brenan regarding its toxicity profile is limited. Hence in this study, we investigated the antioxidant capacity and acute toxicity of ethyl gallate, a phenolic antioxidant present in the A. nilotica (L.) leaf extract.

Methods

The antioxidant activity of ethyl gallate against Fenton’s system (Fe³⁺/H₂O₂/ascorbic acid) generated oxidative damage to pBR322 DNA and BSA was investigated. We also studied the interaction of ethyl gallate to CT-DNA by wave scan and FTIR analysis. The amount of ethyl gallate present in the A. nilotica (L.) leaf extract was calculated using HPLC and represented in gram equivalence of ethyl gallate. The acute toxicity profile of ethyl gallate in the A. nilotica (L.) leaf extract was analyzed in albino Wistar rats. Measurement of liver and kidney function markers, total proteins and glucose were determined in the serum. Statistical analysis was done using statistical package for social sciences (SPSS) tool version 16.0.

Results

Ethyl gallate was found to be effective at 100 μg/mL concentration by inhibiting the free radical mediated damage to BSA and pBR322 DNA. We also found that the interaction of ethyl gallate and A. nilotica (L.) leaf extract to CT-DNA occurs through intercalation. One gram of A. nilotica (L.) leaf extract was found to be equivalent to 20 mg of ethyl gallate through HPLC analysis. Based on the acute toxicity results, A. nilotica (L.) leaf extract and ethyl gallate as well was found to be non-toxic and safe.

Conclusions

Results revealed no mortality or abnormal biochemical changes in vivo and the protective effect of A. nilotica (L.) leaf extract and ethyl gallate on DNA and protein against oxidative stress in vitro. Hence, A. nilotica (L.) leaf extract or ethyl gallate could be used as potential antioxidants with safe therapeutic application in cancer chemotherapy.

【 授权许可】

   
2014 Mohan et al.; licensee BioMed Central Ltd.

【 图 表 】

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