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Neurosci Lett. 2010 Sep 6;481(2):131-4. doi: 10.1016/j.neulet.2010.06.072. Epub 2010 Jul 3.

(-)-Epigallocatechin-3-O-gallate (EGCG) reverses caffeine-induced anxiogenic-like effects.

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College of Pharmacy and CBITRC, Chungbuk National University, Cheongju 361-763, Republic of Korea.


This study was designed to determine whether (-)-epigallocatethin-3-O-gallate (EGCG) could reverse caffeine-induced anxiogenic-like effects in animals. In mice, EGCG antagonized the caffeine-induced reduction in both the open arm entry number and time-spent in open arm on elevated plus-maze. In addition, EGCG also antagonized the caffeine-induced reduction in both the central zone distance and central zone time-spent on an open field apparatus, respectively. Electroencephalogram (EEG) was recorded from the rat anterior cerebral cortex. Caffeine increased the power density-ratios of fast (FW: 8.00-20.00 Hz) and slow (SW: 0.75-8.00 Hz) frequency spectrum bands in these EEG recordings. However, EGCG reduced the caffeine-induced increase of FW/SW ratios. Thus, EGCG reverses caffeine-induced anxiogenic-like effects. We also provide additional evidence that the EEG FW/SW (or SW/FW) ratios can be a useful tool for the prediction of anxiogenic and/or anxiolytic effects in an animal model.

[Indexed for MEDLINE]

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