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Bergamot Essential Oil Differentially Modulates Intracellular Ca2+ Levels in Vascular Endothelial and Smooth Muscle Cells: A New Finding Seen With Fura-2

You, Ji H. MS*; Kang, Purum BS*; Min, Sun Seek PhD; Seol, Geun Hee PhD*

Journal of Cardiovascular Pharmacology: April 2013 - Volume 61 - Issue 4 - p 324–328
doi: 10.1097/FJC.0b013e3182834681
Original Article

Abstract: In this study, we compared the effect of the essential oil of Citrus bergamia Risso [bergamot, bergamot essential oil (BEO)] on the intracellular Ca2+ levels in vascular endothelial (EA) and mouse vascular smooth muscle (MOVAS) cells, using the fura-2 fluorescence technique. BEO caused an initial transient increase in intracellular Ca2+ concentration ([Ca2+]i) in EA cells, followed by a decrease, whereas it induced a sustained increase in [Ca2+]i in MOVAS cells. Linalyl acetate (LA) as a major component of BEO-induced [Ca2+]i mobilization was similar to BEO in EA cells. The increase of [Ca2+]i by LA was higher in EA cells than in MOVAS cells. [Ca2+]i rise induced by extracellular Ca2+ application was significantly blocked by BEO or LA in EA cells but not in MOVAS cells, suggesting that BEO and LA block Ca2+ influx in EA cells. The present results suggest that BEO and LA differentially modulate intracellular Ca2+ levels in vascular endothelial and smooth muscle cells. In addition, blockade of Ca2+ influx by BEO and LA in EA cells may explain the protective effects of BEO on endothelial dysfunction associated with cardiovascular disease.

*Department of Basic Nursing Science, School of Nursing, Korea University, Seoul, Republic of Korea

Department of Physiology and Biophysics, School of Medicine, Eulji University, Daejeon, Republic of Korea.

Reprints: Geun Hee Seol, PhD, Department of Basic Nursing Science, School of Nursing, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-713, Republic of Korea (e-mail: ghseol@korea.ac.kr); Sun Seek Min, PhD, Department of Physiology and Biophysics, School of Medicine, Eulji University, Daejeon 301-746, South Korea (e-mail: ssmin@eulji.ac.kr).

The authors report no financial/conflicts of interest.

Received July 26, 2012

Accepted December 14, 2012

© 2013 Lippincott Williams & Wilkins, Inc.