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Abstract Title:

Pycnogenol Cytotoxicity in Pancreatic INS-1Eβ cells Induced by Calcium Dysregulation.

Abstract Source:

Phytother Res. 2017 Nov ;31(11):1702-1707. Epub 2017 Aug 18. PMID: 28833790

Abstract Author(s):

Jana Viskupicova, Petronela Zizkova, Lucia Rackova, Lubica Horakova

Article Affiliation:

Jana Viskupicova

Abstract:

Natural standardized flavonoid extract from the bark of Pinus pinaster, Pycnogenol (Pyc), was recently found to decrease intensively the activity of sarcoplasmic reticulum Ca2+ -ATPase of rabbit skeletal muscle (SERCA1). On the basis of this inhibitory effect in a cell-free system and similarities of SERCA1 to its other isoforms, proapoptotic properties of Pyc may be expected in cellular systems. Pycnogenol (40-100 μg/mL) induced a concentration-dependent decrease of the viability of pancreatic INS-1E β cells associated with induction of apoptosis. In addition, intracellular Ca2+ level increase was found along with reduction of protein expression level of SERCA2b and impairment of insulin secretion by β cells. These facts indicate that Pyc may induce apoptosis by impairment of calcium homeostasis. Copyright © 2017 John Wiley&Sons, Ltd.

Study Type : In Vitro Study

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