科研之友
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摘要
Aldehyde dehydrogenase-2 (ALDH2) is the main enzyme responsible for acetaldehyde oxidation in ethanol metabolism and also provides protection against oxidative stress. Alpha-lipoic acid (alpha-LA), a natural dithiol compound with antioxidant properties, has been reported to increase ALDH2 activity in cultured cells. We analyzed the therapeutic efficacy of alpha-LA in 63 patients with confirmed acute coronary syndrome (ACS). These patients (52 men and 11 women, with age range 49-72 years) were randomized into two groups: untreated group (n = 30) and alpha-LA group (n = 33). Patients in the alpha-LA group were given an intravenous injection of 600 mg alpha-LA every day for 5 days while the patients in the untreated group were given saline. An isoprostane, 8-iso-prostaglandin F2 alpha (8-iso-PGF2 alpha), one product of arachidonic acid metabolism, was measured as a marker for oxidative stress. The serum levels of 8-iso-PGF2 alpha and ALDH2 activity were determined at admission to the hospital (time 0), and at 24 hours and 1 week after treatment. At 24 hours and 1 week after treatment, ALDH2 activity was significantly higher in the alpha-LA group than in the untreated group (P < 0.05), whereas the levels of 8-iso-PGF2 alpha were significantly lower in the alpha-LA group than in the untreated group (all P < 0.05). Importantly, the decrease of 8-iso-PGF2 alpha levels correlated with the increased ALDH2 activity at both 24 hours (r = 0.6234, P < 0.001) and 1 week after treatment (r = -0.3941, P = 0.0014). alpha-LA may ameliorate oxidative stress through up-regulating ALDH2 activity in patients with ACS.
- 出版日期2013-1
- 单位山东大学
