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蛋白结合硫酸吲哚酚损伤红细胞膜

, PP. 2467-2470

Keywords: 红细胞衰亡,硫酸吲哚酚,蛋白结合毒素,钙离子

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Abstract:

目的研究蛋白结合硫酸吲哚酚对红细胞寿命的影响及作用机制。方法以4%白蛋白结合不同浓度的硫酸吲哚酚孵育0.4%红细胞悬液48h,采用流式细胞仪检测红细胞体积,Annexin-V-FITC凋亡试剂盒检测红细胞表面磷脂酰丝氨酸的标记率,钙离子荧光探针(Fluo3/AM)检测红细胞内Ca2+浓度,酶标分析仪检测红细胞的溶血率,采用SPSS18.0统计软件进行统计分析。结果4%白蛋白结合硫酸吲哚酚孵育0.4%红细胞悬液48h后,随硫酸吲哚酚浓度逐渐增加,红细胞体积逐渐变小[(1603.33±8.50)vs(742.67±14.04),P<0.05],红细胞表面磷脂酰丝氨酸的标记率[(0.26±0.06)vs(10.32±1.64),P<0.05]、红细胞内Ca2+浓度以及溶血率逐渐增加,与对照组相比差异有统计学意义(P<0.05),呈剂量依赖性;当细胞外Ca2+缺乏时,硫酸吲哚酚对红细胞的这种损伤效应明显降低。结论4%白蛋白结合硫酸吲哚酚通过增加钙内流而损伤红细胞,促进红细胞衰亡,是尿毒症患者贫血的发生机制之一,清除蛋白结合毒素有助于改善贫血。

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