ABSTRACT
【Objective】 To study the effects of platelets donation frequency on iron, copper, zinc content and superoxide dismutase(SOD) activity in plasma of blood donors. 【Methods】 128 apheresis platelet donors from August 25, 2020 to August 25, 2021 in our center were divided into 4 groups according to the frequency of platelet donation: first-time donors(n=30) were enrolled as group 1, and donors with 2 to 7 donations(n=23), 8 to 14 donations(n=29), 15 to 24 donations(n=46) within the previous period were group 2, group 3 and group 4. All these donors were males, with the average age of 42 ± 8.3, and had not donated whole blood in the past two years. Inductively coupled plasma mass spectrometry(ICP-MS) was used to detect the content of copper, iron and zinc in plasma of different groups of platelet donors. The SOD activity was detected by WST colorimetric kit. All data were statistically analyzed by SPSS 19.0 software. 【Results】 Significant differences in the content of iron and copper, but no in zinc, were noticed in donors of different groups(P0.05). There was no significant difference in zinc content between every two groups(P>0.05). The SOD inhibition rate of blood donors in different groups was not significantly different. 【Conclusion】 The content of plasma iron, copper, and zinc and the SOD activity were not significantly affected if platelet donations were less than 15 times within a year. For those donated platelets more than 15 times within a year, the content of iron was found to decrease and copper to increase. It is suggested that platelet donations more than 15 times is correlated with the content of iron and copper in plasma of blood donors. Therefore, the proportion of iron-rich food should be appropriately increased in the daily diet for high-frequency(≥15 times per year) apheresis platelet donors after blood donation.