Chloride secretion by semicircular canal duct epithelium is stimulated via beta 2-adrenergic receptors.
Chloride secretion by semicircular canal duct epithelium is stimulated via beta 2-adrenergic receptors.
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半规管上皮分泌氯离子是通过β2-肾上腺素能受体刺激的。
DOI:
10.1152/ajpcell.00283.2002
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发表时间:
2002
期刊:
影响因子:
--
通讯作者:
Marcus,DanielC
中科院分区:
文献类型:
--
作者:
Milhaud,PierreG;Pondugula,SatyanarayanaR;Lee,JunHo;Herzog,Michael;Lehouelleur,Jacques;Wangemann,Philine;Sans,Alain;Marcus,DanielC
The ductal epithelium of the semicircular canal forms much of the boundary between the K+-rich luminal fluid and the Na+-rich abluminal fluid. We sought to determine whether the net ion flux producing the apical-to-basal short-circuit current (Isc) in primary cultures was due to anion secretion and/or cation absorption and under control of receptor agonists. Net fluxes of22Na,86Rb, and36Cl demonstrated a basal-to-apical Cl−secretion that was stimulated by isoproterenol. Isoproterenol and norepinephrine increasedIscwith an EC50of 3 and 15 nM, respectively, and isoproterenol increased tissue cAMP of native canals with an EC50of 5 nM. Agonists for adenosine, histamine, and vasopressin receptors had no effect onIsc. Isoproterenol stimulation ofIscand cAMP was inhibited by ICI-118551 (IC50= 6 μM forIsc) but not by CGP-20712A (1 μM) in primary cultures, and similar results were found in native epithelium.Iscwas partially inhibited by basolateral Ba2+(IC50= 0.27 mM) and ouabain, whereas responses to genistein, glibenclamide, and DIDS did not fully fit the profile for CFTR. Our findings show that the canal epithelium contributes to endolymph homeostasis by secretion of Cl−under β2-adrenergic control with cAMP as second messenger, a process that parallels the adrenergic control of K+secretion by vestibular dark cells. The current work points to one possible etiology of endolymphatic hydrops in Meniere's disease and may provide a basis for intervention.
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DOI:
10.1165/ajrcmb.13.3.7544595
发表时间:
1995
期刊:
American journal of respiratory cell and molecular biology.
影响因子:
--
作者:
Barker,PM;Brigman,KK;Paradiso,AM;Boucher,RC;Gatzy,JT
通讯作者:
Gatzy,JT
DOI:
--
发表时间:
1989
期刊:
Pflügers Archiv
影响因子:
--
作者:
P. Wangemann;D. C. Marcus
通讯作者:
D. C. Marcus
DOI:
--
发表时间:
1984
期刊:
影响因子:
--
作者:
Lake Cr;B. Chernow;G. Feuerstein;D. Goldstein;M. Ziegler
通讯作者:
M. Ziegler
影响因子:
2.4
作者:
P. Wangemann;Jianzhong Liu;M. Shimozono;M. Scofield
通讯作者:
M. Scofield
DOI:
10.1152/ajprenal.1987.253.4.f613
发表时间:
1987-10
期刊:
The American journal of physiology
影响因子:
--
作者:
N. Marcus;D. C. Marcus
通讯作者:
N. Marcus;D. C. Marcus