Alteration in surface ion composition of cultured bone during metabolic, but not respiratory, acidosis.
Alteration in surface ion composition of cultured bone during metabolic, but not respiratory, acidosis.
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代谢期间培养骨的表面离子组成发生变化,但呼吸、酸中毒期间不发生变化。
DOI:
10.1152/ajprenal.1991.261.1.f76
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发表时间:
1991
期刊:
影响因子:
--
通讯作者:
Bushinsky,DA
中科院分区:
文献类型:
--
作者:
Chabala,JM;Levi-Setti,R;Bushinsky,DA
Acidosis produced by a fall in [HCO3-] (metabolic acidosis, Met) produces greater Ca efflux from cultured bone than that produced by a rise in PCO2 (respiratory acidosis, Resp). To compare the effects of Met and Resp on bone surface ion composition we measured the surface abundance of 40Ca, 23Na, and 39K in cultured bone with a scanning ion microprobe utilizing secondary-ion mass spectrometry. Neonatal mouse calvariae were incubated for 24 h in medium simulating either Met (pH = 7.193 +/- 0.034, [HCO3-] = 15.1 +/- 1.4 meq/l), Resp (pH = 7.153 +/- 0.014, PCO2 = 85.4 +/- 1.2 mmHg) or normal physiological (Ctl; pH = 7.484 +/- 0.009, [HCO3-] = 29.7 +/- 0.7, PCO2 = 39.6 +/- 0.3) conditions. The surface of Ctl at 2-nm depth is rich in Na and K relative to Ca (Na/Ca = 25.6, K/Ca = 12.0, ratios of counts/s of secondary ions). Compared with Ctl, Met produced a sharp fall in both Na/Ca (6.5, P less than 0.01) and K/Ca (4.6, P less than 0.01), whereas Resp did not alter Na/Ca (23.8) or K/Ca (15.0). Ca efflux was greater in Met (873 +/- 54 nmol.bone-1.24 h-1) than in Resp (546 +/- 71 nmol.bone-1.24 h-1, P less than 0.01), which was greater than that in Ctl (315 +/- 49 nmol.bone-1.24 h-1, P less than 0.01 vs. Met and vs. Resp).(ABSTRACT TRUNCATED AT 250 WORDS)
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DOI:
10.7326/0003-4819-102-3-438_2
发表时间:
1984
期刊:
The New England Journal of Medicine
影响因子:
--
作者:
W. Nyhan
通讯作者:
W. Nyhan
DOI:
10.1016/0026-0495(77)90095-6
发表时间:
1977
期刊:
Metabolism: clinical and experimental
影响因子:
--
作者:
I. Krieger;E. Winbaum;A. Eisenbrey
通讯作者:
A. Eisenbrey
DOI:
10.1056/nejm197606032942320
发表时间:
1976
期刊:
The New England Journal of Medicine
影响因子:
--
作者:
Huntley Cc
通讯作者:
Huntley Cc
影响因子:
3.6
作者:
F. Ziter;P. Bray;J. A. Madsen;W. Nyhan
通讯作者:
W. Nyhan
影响因子:
3.6
作者:
P. Shaul;J. Steichen;D. Buckley;Kay Ellis;R. Tsang
通讯作者:
R. Tsang