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Smoking cessation increases the resistance of low-density lipoprotein to oxidation
A Sasaki1, K Kondo, Y Sakamoto
1Department of Preventive Medicine, Jikei University School of Medicine, Tokyo, Japan. i36274@m-unix.cc.u-tokyo.ac.jp
Abstract:
The effects of smoking cessation on the susceptibility to oxidation of low-density lipoprotein (LDL) was investigated in 14 men who quit smoking for 3 months. LDL was isolated and susceptibility of LDL to V-70 (4-methoxy-2,4-dimethylvalerinitrile)-mediated oxidation was assessed by measuring conjugated diene production at 234 nm, the lag phase being a measure of the resistance of LDL to oxidation. The mean duration of the lag phase became 1.9-fold longer after 3 months (P < 0.001). The result suggests that the increase in resistance of LDL to oxidation contributes to the reduction of the risk of coronary heart disease by smoking cessation.