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Association of age-related decrease in platelet membrane fluidity with platelet lipid peroxide.

机译:与年龄相关的血小板膜流动性下降与血小板脂质过氧化物的关联。

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摘要

The influence of age on platelet lipid peroxide (LPO), platelet membrane fluidity and the composition of fatty acid was investigated in female Wistar rats widely ranging in age from 14 to 720 days old. LPO levels were significantly higher (p<0.05) in the platelets of upper age groups than in those of lower age groups, showing a significantly positive correlation with age (r=0.84, p<0.0001). Membrane fluidity, assessed by 1,6-diphenyl-1,3,5-hexatriene (DPH) fluorescence polarization, was significantly reduced with age. The composition of fatty acid demonstrated an age-related elevation (p<0.05) in the unsaturation index. The rises in the LPO levels revealed a significantly positive correlation with DPH-polarization (r=0.73, p<0.0001). Thus our results suggested that the age-related deterioration of platelet membrane fluidity, despite a significant elevation in the unsaturation index, was due to the age-related higher basal levels of LPO in platelets.
机译:在年龄范围从14至720天的Wistar雌性大鼠中研究了年龄对血小板脂质过氧化物(LPO),血小板膜流动性和脂肪酸组成的影响。较高年龄组的血小板中的LPO水平显着高于较低年龄组的血小板(p <0.05),与年龄呈显着正相关(r = 0.84,p <0.0001)。通过1,6-二苯基-1,3,5-己三烯(DPH)荧光极化评估的膜流动性随着年龄的增长而显着降低。脂肪酸组成在不饱和指数中显示出与年龄相关的升高(p <0.05)。 LPO水平升高与DPH极化呈显着正相关(r = 0.73,p <0.0001)。因此,我们的结果表明,尽管不饱和指数显着升高,但与年龄相关的血小板膜流动性下降是由于与年龄相关的血小板中较高水平的LPO。

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