Abstract
Withania somnifera L. has been traditionally used as a sedative and hypnotic. The present study was carried out for the purification, characterization, and in vitro cytotoxicity of l-asparaginase from W. somnifera L. l-Asparaginase was purified from the fruits of W. somnifera L. up to 95% through chromatography. The purified l-asparaginase was characterized by size exclusion chromatography, polyacrylamide gel electrophoresis (PAGE), and 2D PAGE. The antitumor and growth inhibition effect of the l-asparaginase was assessed using [3-(4, 5-dimethyl-thiazol-2yl)-2, 5-diphenyl-tetrazolium bromide] (MTT) colorimetric dye reduction method. The purified enzyme is a homodimer, with a molecular mass of 72 ± 0.5 kDa, and the pI value of the enzyme was around 5.1. This is the first report of the plant containing l-asparaginase with antitumor activity. Data obtained from the MTT assay showed a LD50 value of 1.45 ± 0.05 IU/ml. W. somnifera L. proved to be an effective and a novel source of l-asparaginase. Furthermore, it shows a lot of similarity with bacterial l-asparaginases EC-2.
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Oza, V.P., Parmar, P.P., Kumar, S. et al. Anticancer Properties of Highly Purified l-Asparaginase from Withania somnifera L. against Acute Lymphoblastic Leukemia. Appl Biochem Biotechnol 160, 1833–1840 (2010). https://doi.org/10.1007/s12010-009-8667-z
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DOI: https://doi.org/10.1007/s12010-009-8667-z