Chloride transport and intracellular chloride activity in the presence of theophylline in Amphiuma small intestine.
Chloride transport and intracellular chloride activity in the presence of theophylline in Amphiuma small intestine.
复制标题
Amphiuma 小肠中茶碱存在下的氯离子转运和细胞内氯离子活性。
DOI:
10.1113/jphysiol.1981.sp013987
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发表时间:
1981
期刊:
影响因子:
--
通讯作者:
White,JF
中科院分区:
文献类型:
--
作者:
White,JF
1. Simultaneous bidirectional tracer fluxes of 22Na and 36Cl were measured under short‐circuited conditions in isolated stripped segments of Amphiuma duodenum incubated in media containing Cl‐ and HCO3‐. 2. Theophylline (10 mM) increased the short‐circuit current (Isc), eliminated net Cl‐ absorption and elevated the residual flux by more than 50%. 3. Subsequent addition to acetazolamide lowered the Isc and reduced the residual flux. 4. Using double‐barreled Cl‐ specific micro‐electrodes the intracellular activity of Cl‐ averaged 27.1 mM in the presence of theophylline, consistent with active accumulation of Cl‐. 5. Theophylline depolarized the mucosal membrane of villus epithelial cells by an average of 6.9 mV. 6. The findings indicate that the inhibition of Cl‐ absorption by theophylline does not result from complete inhibition of mucosal Cl‐ uptake and provide evidence that HCO3‐ secretion is enhanced by theophylline.
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影响因子:
--
作者:
R. E. Pitts;J. Krachmer
通讯作者:
J. Krachmer
DOI:
--
发表时间:
1983
期刊:
A M A Archives of Ophthalmology
影响因子:
--
作者:
N. F. Martin;G. Kracher;W. Stark;A. Maumenee
通讯作者:
A. Maumenee
影响因子:
4.2
作者:
Weissman,BA;Mondino,BJ;Pettit,TH;Hofbauer,JD
通讯作者:
Hofbauer,JD
影响因子:
--
作者:
W. Stark;N. F. Martin
通讯作者:
N. F. Martin
DOI:
--
发表时间:
1978
期刊:
A M A Archives of Ophthalmology
影响因子:
--
作者:
J. Krachmer;J. Purcell
通讯作者:
J. Purcell