Laminin supports short-term survival of rat septal neurons in low-density, serum-free cultures.

Laminin supports short-term survival of rat septal neurons in low-density, serum-free cultures.
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层粘连蛋白支持大鼠间隔神经元在低密度、无血清培养物中的短期存活。

DOI:
10.1002/jnr.490150102
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发表时间:
1986
影响因子:
4.2
通讯作者:
Cotman,CW
Cotman,CW
中科院分区:
医学3区
文献类型:
--
作者:
Pixley,SK;Cotman,CW

文献摘要

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胚胎大鼠的中隔神经元在无血清培养基中分离和低密度培养时不能存活24小时。在1 mM丙酮酸存在的情况下,5-40 μg/ml的Lamunin具有促进生存的作用。层粘连蛋白只有在细胞镀前或镀中加入才能有效促进细胞存活;如果在细胞附着后添加,则不支持存活。层粘连蛋白浓度的变化不影响附着在培养板上的细胞总数。早在细胞镀后45分钟,层粘连蛋白就以剂量依赖性的方式增加了具有神经突的间隔细胞的百分比,这表明层粘连蛋白对神经突的形成率有影响。24小时时的神经突延伸也取决于层粘连蛋白的浓度。这项研究表明,细胞和底物之间的一些相互作用,独立于细胞附着,对细胞生理有深远的影响,增加细胞存活率和神经突延伸率。本研究还定义了在化学定义的低密度环境中,间隔神经元在细胞相互作用最小的情况下的存活要求。
Septal neurons from embryonic rats do not survive for 24 hr when dissociated and cultured at low density in a serum‐free medium. Lamunin at 5–40 μg/ml acts as a survival‐promoting agent in the presence of 1 mM pyruvate. Laminin is effective in promoting survival only if it is added before or during cell plating; it does not support survival if added after cell attachment. Variations in laminin concentration do not effect the total number of cells attaching to the culture plate. The percentage of septal cells with neurites is increased in a dose‐dependent manner by laminin as early as 45 min after cell plating, suggesting an effect of laminin on the rate of neurite initiation. Neurite extension at 24 hr is also dependent on laminin concentration. This study suggests that some interaction between cells and the substrate, independent of cell attachment, has a profound effect on cell physiology, increasing both cell survival and the rate of neurite extension. This study also defines the survival requirements of septal neurons in a chemically defined environment in a low‐density situation where cellular interactions are at a minimum.
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