Polyphenol (-)-epigallocatechin gallate-induced cardioprotection may attenuate ischemia-reperfusion injury through adenosine receptor activation: a preliminary study / 대한마취과학회지
Korean Journal of Anesthesiology
;
: 340-345, 2012.
Article
in English
| WPRIM
| ID: wpr-213839
ABSTRACT
BACKGROUND:
The activation of guanine nucleotide binding protein-coupled receptors, such as adenosine receptor (ADR) and opioid receptor (OPR), protects the heart against ischemia and reperfusion injury. We hypothesized that ADR or OPR might be involved in polyphenol (-)-epigallocatechin gallate (EGCG)-induced cardioprotection.METHODS:
Langendorff perfused rat hearts were subjected to 30 min of regional ischemia and 2 h of reperfusion. Hearts were treated with 10 microM of EGCG, with or without the ADR or OPR antagonist at early reperfusion. Infarct size measured with 2,3,5-triphenyltetrazolium chloride staining was chosen as end-point.RESULTS:
EGCG significantly reduced infarct volume as a percentage of ischemic volume (33.5 +/- 4.1%) compared to control hearts (14.4 +/- 1.1%, P 0.05 vs. EGCG) blocked the anti-infarct effect by EGCG. The infarct reducing effect of EGCG was significantly reversed by 200 nM of the A1 ADR antagonist DPCPX (25.9 +/- 1.1%, P 0.05 vs. EGCG) and 100 nM of the A3 ADR antagonist MRS1334 (24.1 +/- 1.8%, P > 0.05).CONCLUSIONS:
The infarct reducing effect of EGCG appears to involve activation of ADR, especially A1 and A2B ADR, but not OPR.
Full text:
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Index:
WPRIM (Western Pacific)
Main subject:
Purines
/
Tetrazolium Salts
/
Theophylline
/
Triazines
/
Triazoles
/
Xanthines
/
Reperfusion
/
Reperfusion Injury
/
Catechin
/
Adenosine
Limits:
Animals
Language:
English
Journal:
Korean Journal of Anesthesiology
Year:
2012
Type:
Article
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