Diffusional water permeability of mammalian red blood cells

Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
G Benga, T Borza

Abstract

An extensive programme of comparative nuclear magnetic resonance measurements of the membrane diffusional permeability for water (Pd) and of the activation energy (Ea,d) of this process in red blood cells (RBCs) from 21 mammalian species was carried out. On the basis of Pd, these species could be divided into three groups. First, the RBC's from humans, cow, sheep and "large" kangaroos (Macropus giganteus and Macropus rufus) had Pd values approximately 5 x 10(-3) cm/s at 25 degrees and 7 x 10(-3) cm/s at 37 degrees C. The RBCs from other marsupial species, mouse, rat, guinea pig and rabbit, had Pd values roughly twice higher, whereas echidna RBCs were twice lower than human RBCs. The value of Ea,d was in most cases correlated with the values of Pd. A value of Ea,d approximately 26 kJ/mol was found for the RBCs from humans and the species having similar Pd values. Low values of Ea,d (ranging from 15 to 22 kJ/mol) appeared to be associated with relatively high values of Pd. The highest values of Ea,d (33 kJ/mol) was found in echidna RBCs. This points to specialized channels for water diffusion incorporated in membrane proteins; a relatively high water permeability of the RBC membrane could be due to a greater number of channel pro...Continue Reading

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Citations

Apr 19, 2011·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Qin QinPeter C M van Zijl
Jan 26, 2011·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Qin QinPeter C M van Zijl
Aug 18, 2010·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Alexander G GardenerPenny A Gowland
Nov 22, 2012·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Ksenija GrgacQin Qin
Jul 12, 2013·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Lisa C KrishnamurthyHanzhang Lu
Aug 19, 2015·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Wenbo LiPeter C M van Zijl
Feb 14, 2009·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Jun HuaPeter C M van Zijl
May 19, 2011·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Hanzhang LuPeter van Zijl
Sep 5, 2002·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Mikko I KettunenRisto A Kauppinen
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Mar 22, 2021·The Journal of Biological Chemistry·Fei LiRobert M Stroud
Apr 6, 2019·Chemical Reviews·Christof HannesschlaegerPeter Pohl

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