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    Reversed Phase High‑Performance Liquid Chromatographic Ultra‑violet (Photo Diode Array) Quantification of Oleanolic Acid and its Isomer Ursolic Acid for Phytochemical Comparison and Pharmacological Evaluation of Four Leucas Species Used in Ayurveda

    Pushpendra Kumar Shukla1, Ankita Misra1, Sharad Srivastava1★, Ajay K. S. Rawat1★ Corresponding author

    1. 1Pharmacognosy and Ethnopharmacology Division, CSIR‑National Botanical Research Institute, Lucknow, Uttar Pradesh, India.

    CORRESPONDENCE

    Sharad Srivastava

    Pharmacognosy and Ethnopharmacology Division, CSIR‑National Botanical Research Institute, Lucknow, Uttar Pradesh, India.

    sharad_ks2003@yahoo.com

    Received: 26-10-2015; Revised: 07-12-2015.

    Volume 12, Issue 46s · pp. S159–S164 · PUBLISHED 11 May 2016 · DOI: 10.4103/0973-1296.182173

    View on Pharmacogn. Mag. original site ↗

    ABSTRACT

    Objective: Evaluation of four industrially important Leucas species for their in vitro antidiabetic potential and radical scavenging effect along with high‑performance liquid chromatographic quantification of the bioactive triterpenes. Materials and Methods: The quantification of triterpenes was carried out on C‑18 column with acetonitrile and water (90:10) as the solvent system at a detection wavelength of 210 nm. In vitro antidiabetic activity was evaluated by α‑amylase inhibition assay based on starch–iodine and 3,5 dinitrosalicylic acid (DNS) method. Antioxidant activity was calculated by five different models, namely total phenolic and total flavonoid content, free radical scavenging activity by 1‑1‑diphenyl‑2‑pic‑rylhydrazyl (DPPH), ferric‑reducing power assay, and the total antioxidant capacity. Results: Maximum concentration of oleanolic acid was found in Leucas cristata, followed by Leucas mollissima, Leucas Aspera, and Leucas biflora. Ursolic acid was highest in L. mollissima and then in L. biflora, L. cristata, and L. aspera, respectively. In in vitro antidiabetic activity, IC50 of L. aspera (1.56 ± 0.01 mg/ml) and L. mollissima (0.75 ± 0.005 mg/ml) were found to be highest in DNS and iodine starch assay. IC50 in DPPH assay ranges from 0.6 ± 0.011 to 1.68 ± 0.011 mg/ml. Antioxidant capacity follows the order; L. aspera > L. mollissima > L. biflora > L. cristata. Conclusion: Promising activities were observed in targeted species, thus L. mollissima, L. biflora, and L. cristata can be used alternatively as a substitute to L. aspera.

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      Shukla, P. K., Misra, A., Srivastava, S., & Rawat, A. K. S. (2016). Reversed Phase High‑Performance Liquid Chromatographic Ultra‑violet (Photo Diode Array) Quantification of Oleanolic Acid and its Isomer Ursolic Acid for Phytochemical Comparison and Pharmacological Evaluation of Four Leucas Species Used in Ayurveda. Pharmacognosy Magazine, 12(46s), S159–S164. https://doi.org/10.4103/0973-1296.182173