Abstract
A 1, 2-diglyceride-based multi-step colorimetric assay to measure the pancreatic lipase activity was applied for the determination of the kinetic profiles of the lipase inhibition with a slight modification and the validity verification. With this assay method, our study revealed that platycodin D, one of major constituents of Platycodi Radix, inhibits the pancreatic lipase activity in a competitive type, with the value ofK l being 0.18±0.02 mM. In addition, PD has affected the values ofK m, app andK cat/K m in a dose- dependent manner. The results shed a meaningful light on how PD mediates lipid metabolism in the intestinal tracts. On the other hand, since the revised assay is sensitive, rapid, and does not affect the accuracy to the kinetic properties, it is applicable not only to evaluation of the kinetic properties of the pancreatic lipase, but also to highthroughput screening of pancreatic lipase activity.
Similar content being viewed by others
References
Burdette, R. A. and Quinn, D. M., Interfacial reaction dynamics and acyl-enzyme mechanism for lipoprotein lipase-catalyzed hydrolysis of lipidp-nitrophenyl esters.J. Biol. Chem., 261, 12016–12021 (1986).
Chung, J., Continuous pH-stat titration method for the assay of lipoprotein lipase activityin vitro.Anal. Biochem., 62, 134–148 (1974).
David, L. N., Lehninger Principles of biochemistry. 3rd ed. Worth Publishers. New York. pp. 263–265 (2000).
Drent, M. L. and Van der Veen, E. A., Lipase inhibition, a novel concept in the treatment of obesity.Int. J. Obes. Relat. Metab. Disord., 17, 241–244 (1993).
Farrigan, C. and Pang, K., Obesity market overview.Nat. Rev. Drug Discov., 1, 257–258 (2000).
Han, L. K., Xu, B. J., Kimura, Y., Zheng, Y., and Okuda, H., Platycodi Radix affects lipid metabolism in mice with high fat diet-induced obesity.J. Nutr., 130, 2760–2764 (2000).
Han, L. K., Zheng, Y. N., Xu, B. J., Okuda, H., and Kimura, Y., Saponins from Platycodi Radix ameliorate high fat dietinduced obesity in mice.J. Nutr., 132, 2241–2245 (2002).
Han, L. K., Kimura, Y., Kawashima, M., Takaku, T., Taniyama, T., Hayashi, T., Zheng, Y. N., and Okuda, H., Anti-obesity effects in rodents of dietary teasaponin, a lipase inhibitor.Int. J. Obes. Relat. Metab. Disord., 25, 1459–1464 (2001).
Hiroahi, I. and Yohko, Y., Saponins from the roots ofPlatycodon grandiflorum. Part 1. structure of prosapogenins.J. Chem. Soc. Perkin Trans I, 1928–1933 (1981).
Imamura, S., Arai, T., Takao, K., and Misaki, H., An enzymatic method using 1,2-diglyceride for pancreatic lipase test in serum.Clin. Chem., 35, 1126 (1989).
Keating, G. M. and Jarvis, B., Orlistat: in the prevention and treatment of type 2 diabetes mellitus.Drugs, 61, 2107–2119; discussion 2120-2121 (2001).
Panteghini, M., Bonora, R., and Pagani, F., Measurement of pancreatic lipase activity in serum by a kinetic colorimetric assay using a new chromogenic substrate.Ann. Clin. Biochem., 38, 365–370 (2001).
Pencreac’h, G., Graille, J., Pina, M., and Verger, R., An ultraviolet spectrophotometric assay for measuring lipase activity using long-chain triacyglycerols from Aleurites fordii seeds.Anal. Biochem., 303, 17–24 (2002).
Ros, E., Intestinal absorption of triglyceride and cholesterol. Dietary and pharmacological inhibition to reduce cardiovascular risk.Atherosclerosis, 151, 357–379 (2000).
Tietz, N. W., Astles, J. R., and Shuey, D. R., Lipase activity measured in serum by a continuous-monitoring pH-Stat technique-an update.Clin. Chem., 35, 1688–1693 (1989).
Uusitupa, M., New aspects in the management of obesity, operation and the impact of lipase inhibitors.Curr. Opin. Lipidol., 10, 3–7 (1999).
Wilding, J., The future of obesity treatment.Exs., 89, 181–191 (2000).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Zhao, H.L., Kim, Y.S. Determination of the kinetic properties of platycodin D for the inhibition of pancreatic lipase using a 1,2-diglyceride-based colorimetric assay. Arch Pharm Res 27, 1048–1052 (2004). https://doi.org/10.1007/BF02975430
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02975430