Optimization of ultrasound-assisted extraction of flavonoid compounds and their pharmaceutical activity from curry leaf (Murraya koenigii L.) using response surface methodology

BMC Complementary and Alternative Medicine

Asmah Rahmat²  Ehsan Karimi¹  Hawa ZE Jaafar¹  Ali Ghasemzadeh¹ 

[1] Department of Crop Science, Faculty of Agriculture, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia;Department of Nutrition & Dietetics, Faculty of Medicine & Health Sciences, University Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia

关键词: Flavonoids;    HeLa cancer;    Curry leaf;    Ultrasound-assisted;    Ultra high performance liquid chromatography;    Response surface methodology;   

Others  :  1086865
DOI  :  10.1186/1472-6882-14-318

 received in 2014-06-02, accepted in 2014-08-21,  发布年份 2014

【 摘 要 】

Background

Extraction prior to component analysis is the primary step in the recovery and isolation of bioactive phytochemicals from plant materials.

Methods

Response surface methodology was applied to optimize ultrasound-assisted extraction conditions followed by ultra high performance liquid chromatography (UHPLC) to achieve high catechin, myricetin, and quercetin contents, and high antioxidant and anticancer activities in the curry leaf extracts. The antioxidant and anticancer activities of the leaf extracts were determined by the 1,1-diphenyl-2-picryl-hydrazyl (DPPH) and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assays, respectively. The central composite experimental design (3-level, 3-factorial) was employed to consider the effects of ultrasonic power (80–150 W), temperature (40–80°C), and methanol dilution (40–80%) on the properties of the curry leaf extracts.

Results

It was found that ultrasonic power of 145.49 W at 55.9°C with 80% methanol was the most appropriate set of conditions for the extraction of catechin, myricetin, and quercetin from curry leaves with the consequent high antioxidant activity. Using the optimum extraction conditions, the extraction yields of catechin, myricetin, and quercetin were 0.482, 0.517, and 0.394 mg/g DW, respectively, and the antioxidant activity was enhanced to 83%. The optimized extract showed more distinct anticancer activity against HeLa cancer cells in a concentration of 67.2 μg/mL (P < 0.01) without toxicity to normal cells.

Conclusions

The results indicated that the pharmaceutical quality of curry leaves could be improved significantly by optimizing the extraction process using response surface methodology.

【 授权许可】

   
2014 Ghasemzadeh et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

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