Ki67 is a Graded Rather than a Binary Marker of Proliferation versus Quiescence.
Ki67 is a Graded Rather than a Binary Marker of Proliferation versus Quiescence.
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DOI:
10.1016/j.celrep.2018.06.110
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发表时间:
2018-07-31
期刊:
影响因子:
8.8
通讯作者:
Spencer SL
中科院分区:
文献类型:
--
作者:
Miller I;Min M;Yang C;Tian C;Gookin S;Carter D;Spencer SL
Ki67 staining is widely used as a proliferation indicator in the clinic, despite poor understanding of this protein’s function or dynamics. Here, we track Ki67 levels under endogenous control in single cells over time and find that Ki67 accumulation occurs only during S, G2, and M phases. Ki67 is degraded continuously in G1 and G0 phases, regardless of the cause of entry into G0/quiescence. Consequently, the level of Ki67 during G0 and G1 in individual cells is highly heterogeneous and depends on how long an individual cell has spent in G0. Thus, Ki67 is a graded rather than a binary marker both for cell-cycle progression and time since entry into quiescence. Ki67 is one of the most widely used markers of proliferation in oncology. Contrary to its canonical use as a binary marker of proliferation versus quiescence, Miller et al. find that Ki67 levels decay steadily in quiescent cells, which may enable more advanced clinical applications.
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通讯作者:
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通讯作者:
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