Inhibition of DNA synthesis in SV3T3 cultures by isolated 3T3 plasma membranes.

Inhibition of DNA synthesis in SV3T3 cultures by isolated 3T3 plasma membranes.
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通过分离的3T3质膜抑制SV3T3培养物中DNA合成的抑制。

DOI:
10.1083/jcb.97.1.276
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发表时间:
1983-07
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Lerch V
Lerch V
中科院分区:
其他
文献类型:
--
作者:
Peterson SW;Lerch V

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在存在融合剂的情况下,将 3T3 质膜添加到 SV3T3 细胞的亚汇合培养物中。如果该方案导致将负责密度依赖性生长抑制的 3T3 质膜成分引入到 SV3T3 细胞膜中,则 SV3T3 细胞培养物预计会在接近汇合时显示出 DNA 合成速率下降。这些实验的结果表明,经过如此处理的 SV3T3 培养物中的 DNA 合成率比未处理的对照低多达 63%。这种效应不能仅归因于融合剂或 3T3 质膜。这种生长抑制作用是 3T3 膜特有的,当 SV3T3 质膜与 SV3T3 细胞培养物融合时不会观察到。这些数据支持这样的假设,即SV3T3细胞中密度依赖性生长抑制的丧失的一方面是质膜成分的缺失或改变,此外,通过将细胞与3T3质膜融合,密度依赖性生长抑制可以部分恢复到SV3T3细胞培养物中。
3T3 plasma membranes were added to subconfluent cultures of SV3T3 cells in the presence of fusogens. If this protocol results in the introduction into the SV3T3 cell membrane of 3T3 plasma membrane components responsible for density-dependent inhibition of growth, then the SV3T3 cell cultures would be expected to show decreased rates of DNA synthesis as they approach confluence. Results of these experiments indicate that rates of DNA synthesis in SV3T3 cultures so treated were as much as 63% less than in untreated controls. This effect could not be attributed to the fusogens or to the 3T3 plasma membranes alone. This growth-inhibitory effect is specific for 3T3 membranes and is not observed when SV3T3 plasma membranes are fused with SV3T3 cell cultures. These data support the hypothesis that one aspect of the loss of density-dependent inhibition of growth in SV3T3 cells is a deletion or alteration in plasma membrane components and, further, that density- dependent inhibition of growth can be in part restored to SV3T3 cell cultures by fusing the cells with 3T3 plasma membranes.
DOI: 10.1073/pnas.77.1.399
发表时间: 1980-01-01
期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子: --
作者:
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发表时间: 1963-05
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发表时间: 1981-01-01
影响因子: 5.6
作者:
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