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Journal of Fluorescence

, Volume 24, Issue 2, pp 279–284 | Cite as

Resveratrol Interferes with Fura-2 Intracellular Calcium Measurements

  • Richard F. Kopp
  • Colin A. Leech
  • Michael W. Roe
SHORT COMMUNICATION

Abstract

Resveratrol, a naturally occurring polyphenol found in some fruits and especially in grapes, has been reported to provide diverse health benefits. Resveratrol’s mechanism of action is the subject of many investigations, and some studies using the ratiometric calcium indicator Fura-2 suggest that it modulates cellular calcium responses. In the current study, contradictory cellular calcium responses to resveratrol applied at concentrations exceeding 10 μM were observed during in vitro imaging studies depending on the calcium indicator used, with Fura-2 indicating an increase in intracellular calcium while Fluo-4 and the calcium biosensor YC3.60 indicated no response. When cells loaded with Fura-2 were treated with 100 μM resveratrol, excitation at 340 nm resulted in a large intensity increase at 510 nm, but the expected concurrent decline with 380 nm excitation was not observed. Pre-treatment of cells with the calcium chelator BAPTA-AM did not prevent a rise in the 340/380 ratio when resveratrol was present, but it did prevent an increase in 340/380 when ATP was applied, suggesting that the resveratrol response was an artifact. Cautious data interpretation is recommended from imaging experiments using Fura-2 concurrently with resveratrol in calcium imaging experiments.

Keywords

Ca2+ signaling Fura-2 Fluo-4 YC3.60 BAPTA-AM Resveratrol 

Notes

Acknowledgments

This work was supported by a Basic Science Award from the American Diabetes Association to CAL and NIH grants R01 DK074966 and R01 DK092616 to MWR. Adenovirus YC3.60 was a generous gift from Dr. Christopher Rhodes, University of Chicago, Chicago, IL.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Richard F. Kopp
    • 1
  • Colin A. Leech
    • 1
  • Michael W. Roe
    • 1
    • 2
  1. 1.Department of MedicineUpstate Medical UniversitySyracuseUSA
  2. 2.Department of Cell and Developmental BiologyUpstate Medical UniversitySyracuseUSA

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