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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Morphology and water permeability of red blood cells from green sea turtle (Chelonia mydas)
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Morphology and water permeability of red blood cells from green sea turtle (Chelonia mydas)

机译：绿海龟（Chelonia mydas）红细胞的形态和透水性

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摘要

The morphology and diffusional water permeability (P (d)) of red blood cells (RBCs) from green sea turtle (GST) (Chelonia mydas) are presented for the first time. The RBCs had an ellipsoidal shape with full-axis lengths (diameters): D = 14.4 mu m; d = 10.2 mu m; h = 2.8 mu m. The values of P (d) (cm s(-1)) were 5.1 x 10(-3) at 15 A degrees C, 5.7 x 10(-3) at 20 A degrees C, 6.3 x 10(-3) at 25 A degrees C, 6.8 x 10(-3) at 30 A degrees C, and 7.9 x 10(-3) at 37 A degrees C (i.e., significantly higher than in human RBCs in which it was measured to be 4.2 x 10(-3) at 25 A degrees C, 5.0 x 10(-3) at 30 A degrees C, and 6.2 x 10(-3) at 37 A degrees C). There was a lack of inhibition of P (d) of GST RBCs by p-chloromercuribenzoate (PCMB), a well-known inhibitor of the RBC water channel proteins (WCPs). The activation energy of water diffusion (E (a,d)) in GST RBCs was 15.0 A +/- 1.6 kJ mol(-1) which is lower than the E (a,d) for human RBCs (25 kJ mol(-1)). These results indicate that in the membrane of GST RBCs, there were no WCPs that were inhibited by the mercurial reagent, while the lipid bilayer of this membrane is unusually permeable to water. This is likely to be a phylogenetically old trait, like that found in amphibians and even the later birds, all of which have nucleated erythrocytes; and it is also likely to be a result of the animal's adaptation to a herbivorous diet (algae and seagrasses).
机译：首次介绍了绿海龟（GST）（Chelonia mydas）的红细胞（RBC）的形态和扩散水渗透性（P（d））。 RBC为椭圆形，具有全轴长度（直径）：D = 14.4μm; d ＝10.2μm。 h ＝2.8μm。 P（d）（cm s（-1））的值在15 A摄氏度下为5.1 x 10（-3），在20 A摄氏度下为5.7 x 10（-3），在6.3 A下为6.3 x 10（-3） 25 A摄氏度，30 A摄氏度下的6.8 x 10（-3）和37 A摄氏度下的7.9 x 10（-3）（即，明显高于人类RBC的测量值，后者为4.2 x 10 （-3）在25 A摄氏度，5.0 x 10（-3）在30 A摄氏度和6.2 x 10（-3）在37 A摄氏度）。对氯mercuribenzoate（PCMB），一种众所周知的RBC水通道蛋白（WCP）抑制剂，对GST RBC的P（d）缺乏抑制作用。 GST RBC中水扩散的活化能（E（a，d））为15.0 A +/- 1.6 kJ mol（-1），低于人RBC的E（a，d）（25 kJ mol（-） 1））。这些结果表明，在GST RBCs的膜中，没有WCP被汞试剂抑制，而该膜的脂双层却异常地透水。这很可能是系统发育上的古老特征，就像在两栖动物甚至后来的鸟类中都发现的那样，它们都具有成核的红细胞。这也可能是动物适应草食饮食（藻类和海草）的结果。

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