23Na NMR spectroscopy of proximal tubule suspensions.
23Na NMR spectroscopy of proximal tubule suspensions.
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近端小管悬浮液的 23Na NMR 光谱。
DOI:
10.1038/ki.1986.61
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发表时间:
1986
影响因子:
19.6
通讯作者:
Gupta,RK
中科院分区:
文献类型:
--
作者:
Kumar,AM;Spitzer,A;Gupta,RK
23Na NMR spectroscopy of proximal tubule suspensions. Intracellular sodium concentrations in proximal tubule suspensions of rat kidney were measured by NMR spectroscopy. A simple method for the preparation of proximal tubule suspension is described. Examination by light microscopy revealed these preparations to contain 93.6 ± 0.6% (N = 5) proximal tubules, and electron microscopy demonstrated that the tubules were open. When incubated with trypan blue for five min, only 2% of tubules picked-up the dye. The basal oxygen consumption rate was 0.42 ± 0.01 µl min-1mg protein-1(N = 6). Addition of succinate (5 mM) resulted in a fivefold increase in the rate of oxygen consumption. The23Na spectra were obtained in proximal tubules incubated for 30 min in the aqueous shift reagent dysprosium tripolyphosphate Dy(PPPi)27-. The NMR observable sodium concentration was 34.1 ± 1.8 mM at room temperature and 16.3 ± 0.6 mM (P < 0.001) at 37°C. Addition of ouabain (10-4M) at 37°C resulted in an increase in intracellular sodium to 30.9 ± 2.9 mM (P < 0.001), while nystatin increased the concentration of sodium to 72.0 ± 9.1 mM (P < 0.001), compared to basal concentration. Thus NMR permits the measurement of intracellular concentration of sodium in proximal tubules under basal conditions and to monitor, in the same preparation, the changes that occur under various experimental conditions without interfering with the morphologic integrity of the cells.
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DOI:
10.1042/bj0450068
发表时间:
1949
期刊:
The Biochemical journal
影响因子:
--
作者:
J. Robinson
通讯作者:
J. Robinson
DOI:
--
发表时间:
1985
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Rayson,BM;Gupta,RK
通讯作者:
Gupta,RK
影响因子:
5.5
作者:
DICK, DAT;FRY, DJ;ROGERS, AW
通讯作者:
ROGERS, AW
DOI:
10.1152/ajprenal.1978.234.4.f261
发表时间:
1978
期刊:
The American journal of physiology
影响因子:
--
作者:
M. Civan
通讯作者:
M. Civan
DOI:
10.1152/ajplegacy.1964.206.3.483
发表时间:
1964
期刊:
The American journal of physiology
影响因子:
--
作者:
Maurice B. Burg;E. F. Grollman;Jack Orloff
通讯作者:
Jack Orloff