Hemodialysis and red cell cation transport in uremia: role of membrane free fatty acids.
Hemodialysis and red cell cation transport in uremia: role of membrane free fatty acids.
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尿毒症中的血液透析和红细胞阳离子转运:膜游离脂肪酸的作用。
DOI:
10.1038/ki.1989.28
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发表时间:
1989
影响因子:
19.6
通讯作者:
Mitch,WE
中科院分区:
文献类型:
--
作者:
Kelly,RA;Canessa,ML;Steinman,TI;Mitch,WE
Hemodialysis and red cell cation transport in uremia: Role of membrane free fatty acids. Active and facilitated cation transport in erythrocytes of uremic patients may be improved acutely by hemodialysis, although the mechanisms remain unknown. As nonesterified fatty acids (NEFA) can affect Na+pump activity in vitro, changes in plasma and red cell membrane NEFA content following a single hemodialysis procedure were examined and compared with acute changes in erythrocyte cation flux rates in 34 hemodialysis patients. In nonsodium-loaded cells, small changes in Na+pump flux with dialysis did correlate with changes in intracellular Na+content (r = 0.59; N = 17; P < 0.01). On average, neither maximal Na+pump activity nor Na+/Li+counter-transport flux improved with dialysis, but Na+/K+/Cl-cotransport rates rose 25% post-dialysis (P < 0.02). Plasma NEFA levels rose 87% following hemodialysis but erythrocyte membrane NEFA content declined by 23% (P < 0.001). Importantly, 24 of the 34 subjects studied had a decrease in erythrocyte membrane NEFA content of greater than 10%, and in these patients, the fall in membrane NEFA correlated with an increase in ouabain-sensitive Na+efflux (r = 0.564; P < 0.01). The effects of hemodialysis on both erythrocyte NEFA content and Na+pump flux could be reproduced by incubating pre-dialysis cells in fatty acid-free albumin. We conclude that acute changes in membrane NEFA may modulate active cation transport in uremic erythrocytes.
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DOI:
--
发表时间:
1968
期刊:
Transactions of the Association of American Physicians
影响因子:
--
作者:
C. Cole;J. Balfe;L. Welt
通讯作者:
L. Welt
DOI:
--
发表时间:
1978
期刊:
Journal of Physiology
影响因子:
--
作者:
M. Claret;R. Garay;F. Giraud
通讯作者:
F. Giraud
影响因子:
4.1
作者:
L. Debeljuk;I. Torres;A. Schally
通讯作者:
A. Schally
影响因子:
2.5
作者:
K. Komidori;T. Kamada;T. Yamashita;R. Harada;Y. Otsuji;S. Hashimoto;Y. Chūman;S. Otsuji
通讯作者:
S. Otsuji
DOI:
--
发表时间:
1974
期刊:
Clinical science and molecular medicine
影响因子:
--
作者:
J. Patrick;N. Jones
通讯作者:
N. Jones