Acetylcholine sensitivity of innervated and noninnervated Xenopus muscle cells in culture.

Acetylcholine sensitivity of innervated and noninnervated Xenopus muscle cells in culture.
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培养物中受神经支配和非神经支配的非洲爪蟾肌肉细胞的乙酰胆碱敏感性。

DOI:
10.1016/0012-1606(82)90011-2
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发表时间:
1982
影响因子:
2.7
通讯作者:
Kidokoro,Y
Kidokoro,Y
中科院分区:
生物学3区
文献类型:
--
作者:
Gruener,R;Kidokoro,Y

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研究了培养的异爪肌细胞在存在或不存在神经元的情况下对乙酰胆碱(ACh)的化学敏感性。在没有神经细胞的情况下生长的肌肉细胞对整个表面的乙酰胆碱敏感(2.4 mV/pC),偶尔有高化学敏感性的斑点(“热点”)。在含有神经管细胞的培养物中,无论是否存在神经接触或功能性突触,肌肉细胞的乙酰胆碱敏感性都增加了约50%。在以神经管细胞为条件的培养基中培养的肌肉细胞中,观察到类似的乙酰胆碱敏感性增加。功能神经支配肌肉细胞与非神经支配肌肉细胞在相同培养条件下对连接外区乙酰胆碱的敏感性无显著差异。然而,交界区的化学敏感性比交界外区高约5倍。这种连接化学敏感性的增加可能很好地解释了先前报道的在神经诱导的ACh受体积累过程中发生的微型终板电位振幅的增加。
The chemosensitivity ofXenopusmuscle cells grown in culture to iontophoretically applied acetylcholine (ACh) in the presence or absence of neurons was examined. Muscle cells grown without nerve cells are sensitive to ACh over their entire surface (2.4 mV/pC) with occasional spots of high chemosensitivity (“hot spots”). In cultures containing neural tube cells, the ACh sensitivity of muscle cells increased by approximately 50% regardless of the presence of nerve contacts or functional synapses. A similar increase in the ACh sensitivity was observed in muscle cells cultured in medium conditioned by neural tube cells. The ACh sensitivity of the extrajunctional region in functionally innervated muscle cells was not different from that of noninnervated cells growing in the same cultures. However, the chemosensitivity at the junctional region was about fivefold higher than that of the extrajunctional area. This increase in junctional chemosensitivity may well account for the increase in miniature endplate potential amplitude which has previously been reported to occur during nerve-induced ACh receptor accumulation.
DOI: 10.1113/jphysiol.1971.sp009605
发表时间: 1971
期刊: The Journal of Physiology
影响因子: --
作者:
A. Feltz;A. Mallart;R. Kahn;A. le Yaouanc
通讯作者: A. le Yaouanc
DOI: 10.1098/rspb.1971.0047
发表时间: 1971
期刊: Proceedings of the Royal Society of London. Series B. Biological Sciences
影响因子: --
作者:
S. W. Kuffler;M. Dennis;A. Harris
通讯作者: A. Harris
DOI: 10.1073/pnas.70.1.270
发表时间: 1973-01-01
影响因子: 11.1
作者:
SYTKOWSKI, AJ;VOGEL, Z;NIRENBERG, MW
通讯作者: NIRENBERG, MW
DOI: 10.1073/pnas.73.12.4594
发表时间: 1976-01-01
影响因子: 11.1
作者:
AXELROD, D;RAVDIN, P;PODLESKI, TR
通讯作者: PODLESKI, TR
DOI: 10.1113/jphysiol.1962.sp006941
发表时间: 1962-01-01
影响因子: 5.5
作者:
DIAMOND, J;MILEDI, R
通讯作者: MILEDI, R