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The purpose of this study was to explore the peptides that are related to acute reduction of blood pressure after alcohol drinking. Venous blood was collected from male healthy volunteers before and after drinking white wine (3 ml/kg weight) containing 13% of ethanol. Peptidome analysis for serum samples was performed using a new target plate, BLOTCHIP ® . Alcohol caused significant decreases in systolic and diastolic blood pressure levels at 45 min. The peptidome analysis showed that the levels of three peptides of  m/z  1467, 2380 and 2662 changed significantly after drinking. The  m/z  1467 and 2662 peptides were identified to be fragments of fibrinogen alpha chain, and the  m/z  2380 peptide was identified to be a fragment of complement C4. The intensities of the  m/z  2380 and  m/z  1467 peptides before drinking were associated with % decreases in systolic and diastolic blood pressure levels at 45 min after drinking compared with the levels before drinking, while there were no significant correlations between the intensity of the  m/z  2662 peptide and % decreases in systolic and diastolic blood pressure levels after drinking. The  m/z  1467 and 2380 peptides are suggested to be markers for acute reduction of blood pressure after drinking alcohol.

Potential Biomarker Peptides Associated with Acute Alcohol-Induced Reduction of Blood Pressure