Journal of Food Science and Technology

, Volume 51, Issue 12, pp 3910–3917 | Cite as

In vitro antidiabetic and inhibitory potential of turmeric (Curcuma longa L) rhizome against cellular and LDL oxidation and angiotensin converting enzyme

  • P. C. Lekshmi
  • Ranjith Arimboor
  • V. M. Nisha
  • A. Nirmala MenonEmail author
  • K. G. Raghu
Original Article


Turmeric (Curcuma longa L) rhizome extracts were evaluated for their antidiabetic, antihypertensive and antioxidant potentials. α-Glucosidase (0.4 μg/mL) and α-amylase (0.4 μg/mL) inhibitory potential of turmeric ethyl acetate extract was significantly higher than those of the reference drug acarbose (17.1 μg/mL and 290.6 μg/mL respectively). Protein glycation inhibitory potential of ethyl acetate extract was 800 times higher than that of ascorbic acid. High potential of ethyl acetate extract to scavenge free radicals and to reduce LDL oxidation and cellular oxidative stress was also revealed. The positive correlation obtained between the free radical scavenging capacity of the extracts and their antiglycation potential further confirmed the role of antioxidants in controlling glycation reactions. Ethyl acetate extract was also found as effective in reducing hypertension by inhibiting angiotensin converting enzyme (ACE). Antidiabetic, ACE inhibitory and antioxidant capacities of the extracts were in the order of their curcumin contents.


Curcuma longa L Glucosidase Angiotensin Antiglycation LDL oxidation and antioxidant 



We gratefully acknowledge the financial support provided by Council of Scientific and Industrial Research, India.


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Copyright information

© Association of Food Scientists & Technologists (India) 2013

Authors and Affiliations

  • P. C. Lekshmi
    • 1
  • Ranjith Arimboor
    • 1
  • V. M. Nisha
    • 1
  • A. Nirmala Menon
    • 1
    Email author
  • K. G. Raghu
    • 1
  1. 1.Agroprocessing and Natural Products DivisionCSIR-National Institute for Interdisciplinary Science and TechnologyThiruvananthapuramIndia

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