Growth of neurites without filopodial or lamellipodial activity in the presence of cytochalasin B.

Growth of neurites without filopodial or lamellipodial activity in the presence of cytochalasin B.
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DOI:
10.1083/jcb.99.6.2041
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发表时间:
1984-12
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Letourneau PC
Letourneau PC
中科院分区:
其他
文献类型:
--
作者:
Marsh L;Letourneau PC

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为了研究生长锥内肌动蛋白介导的张力在轴突生长中的作用,我们在细胞松弛素B存在的情况下,在各种基质上培养鸡胚背根神经节细胞。延时录像被用来监测活细胞的行为,并通过免疫荧光和电子显微镜观察薄切片和整个,洗涤剂提取的细胞与肌球蛋白的S1片段装饰的神经突中的细胞骨架的安排进行了评估。在高度粘附的基质上,观察到神经细胞在细胞松弛素的存在下延伸出许多(尽管特别定向)神经突,尽管它们缺乏典型生长锥的丝状伪足和片状伪足或有序的肌动蛋白网络特征。我们的结论是,生长锥的活动是不必要的轴突伸长,虽然肌动蛋白阵列似乎在介导的基质选择性和轴突形状的特点很重要。
To examine the role in neurite growth of actin-mediated tensions within growth cones, we cultured chick embryo dorsal root ganglion cells on various substrata in the presence of cytochalasin B. Time-lapse video recording was used to monitor behaviors of living cells, and cytoskeletal arrangements in neurites were assessed via immunofluorescence and electron microscopic observations of thin sections and whole, detergent-extracted cells decorated with the S1 fragment of myosin. On highly adhesive substrata, nerve cells were observed to extend numerous (though peculiarly oriented) neurites in the presence of cytochalasin, despite their lack of both filopodia and lamellipodia or the orderly actin networks characteristic of typical growth cones. We concluded that growth cone activity is not necessary for neurite elongation, although actin arrays seem important in mediating characteristics of substratum selectivity and neurite shape.
DOI: 10.1073/pnas.77.10.5919
发表时间: 1980-01-01
期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
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