Taxol induces microtubule-rough endoplasmic reticulum complexes and microtubule-bundles in cultured chondroblasts.
Taxol induces microtubule-rough endoplasmic reticulum complexes and microtubule-bundles in cultured chondroblasts.
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紫杉醇在培养的成软骨细胞中诱导微管-粗面内质网复合物和微管束。
DOI:
--
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发表时间:
1983
期刊:
影响因子:
--
通讯作者:
H. Holtzer
中科院分区:
文献类型:
--
作者:
S. Tokunaka;T. Friedman;Y. Toyama;M. Pacifici;H. Holtzer
Taxol induces a vast increase in the number of microtubules (MTs) in functional chondroblasts. The drug also induces a marked change in MT distribution. In control cultures, anti-tubulin stains long, fine, sinuous filaments radiating from a perinuclear center. In taxol-treated cells, anti-tubulin stains stubby, straight, chevron-like structures that assume a striking antipodal distribution. Such MT-bundles are relatively stable: they persist for over 48 h after removal of taxol, and even for 16-24 h in Colcemid. Many of these supernumerary MTs bind to, and align on, the cytoplasmic face of the rough endoplasmic reticulum (RER). In binding, the MTs displace the numerous ribosomes that normally stud the surface of the cisternae of the RER. The bound MTs form a remarkably uniform layer with center-to-center spacings of 40 nm. The attached parallel arrays of MTs achieve lengths of over 10 microns. These bound MTs not only dislodge ribosomes from the RER surface, but they also zip together adjacent ER complexes, forming tiers of two to eight cisternae. Numerous cytoplasmic bundles of hexagonally-ordered MTs are also induced. When closely aligned, the MTs assume a crystalline configuration with a six-fold symmetry, a central MT being surrounded by six equidistant MTs. A single cell can have over 100 MT-bundles and the number of MTs per bundles varies from 2-30. The forces aggregating cytoplasmic MT-bundles probably differ from those that bind MTs to the RER. Taxol also fragments the prominent Golgi complex that characterizes actively secreting chondroblasts. No obvious morphologic relationship has yet been detected between these induced MTs and other organelles such as intermediate-sized filaments, microfilaments, mitochondria, Golgi cisternae, or secretory vesicles.
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DOI:
10.1073/pnas.79.21.6556
发表时间:
1982
影响因子:
11.1
作者:
Toyama,Y;Forry-Schaudies,S;Hoffman,B;Holtzer,H
通讯作者:
Holtzer,H
DOI:
10.1101/sqb.1982.046.01.033
发表时间:
1982
期刊:
Cold Spring Harbor symposia on quantitative biology
影响因子:
--
作者:
Holtzer,H;Bennett,GS;Tapscott,SJ;Croop,JM;Toyama,Y
通讯作者:
Toyama,Y
影响因子:
2.7
作者:
Tapscott,SJ;Bennett,GS;Toyama,Y;Kleinbart,F;Holtzer,H
通讯作者:
Holtzer,H
DOI:
--
发表时间:
1981
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Pacifici,M;Fellini,SA;Holtzer,H;DeLuca,S
通讯作者:
DeLuca,S
DOI:
--
发表时间:
1981
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Fellini,SA;Pacifici,M;Holtzer,H
通讯作者:
Holtzer,H