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Psychiatry Res. 1987 Mar;20(3):199-205.

Platelet monoamine oxidase: low activity in cigarette smokers.

Abstract

Platelet monoamine oxidase (MAO) activity and plasma thiocyanate concentration (an index of smoking behavior) were measured in 109 normal male and female volunteers. MAO activity was significantly lower and plasma thiocyanate concentration significantly higher in smoking volunteers than in nonsmoking volunteers. A significant negative correlation between MAO activity and thiocyanate concentration was observed in female smokers (rs = 0.43, n = 36) but not for male smokers (rs = 0.02, n = 31). In nine smokers who gave up smoking, mean (+/- SD) platelet MAO activity increased significantly (17.5 +/- 4.1 nmole/mg/hour to 24.6 +/- 4.2 nmole/mg/hour). At the same time, mean (+/- SD) plasma thiocyanate concentrations decreased significantly (144 +/- 41 microM to 50 +/- 12 microM). These data suggest that smoking directly or indirectly reduced platelet MAO activity.

PMID:
3588781
[PubMed - indexed for MEDLINE]
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