咬痕细胞 Degmacyte

标签:
异形红细胞咬痕细胞g6pd形态杂谈 |
咬痕细胞:一种形态异常的红细胞,一种在国内教科书或图谱书上很少见到和介绍的异常形态红细胞,在百度上也搜不到他的定义,今天张老师在博客中给你简单介绍。
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图1:咬痕细胞(箭头所指)
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图2:咬痕细胞(箭头所指)
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图3:咬痕细胞(箭头所指)
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图5:咬痕细胞与海因兹小体(资料图)
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图5 咬痕细胞示意图
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图6 来源于国外网站上的咬痕细胞图组合。
以下是有关咬痕细胞的英文资料简要介绍,希望英文好的同学们将其翻译成流畅的中文,供大家学习参考。
A degmacyte (aka "bite cell") is an abnormally shaped red blood cell with one or more semicircular portions removed from the cell margin.These "bites" result from the removal of denatured hemoglobin by macrophages in the spleen. Glucose-6-phosphate dehydrogenase deficiency, in which uncontrolled oxidative stress causes hemoglobin to denature and form Heinz bodies, is a common disorder that leads to the formation of bite cells.
The "bites" in degmacytes are smaller than the missing red blood cell fragments seen in schistocytes.
Bite cells are present in G6PD deficiency. When you don’t have enough G6PD around, you can’t reduce toxic metabolites (like peroxides). When you’re exposed to an oxidant substance, you get lots of these nasty substances, and they start attacking the bonds between heme and globin. The globin chains break free and form a little ball that sticks to the inside of the cell membrane (this little ball is called a Heinz body). Macrophages in the spleen see these Heinz bodies and bite them out, forming “bite cells”.
作者:北京协和医院检验科 张时民,写于2015-6-15