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Figure 6.20. Schematic model of nuclear pore structural disruption during
apoptosis.
All in all, apoptosis requires a remodelling of structure and mechanics
of both nuclear envelope faces to bring about nuclear collapse ( Fig. 6.20 ) .
Degradation of the cytoplasmic NPC ilaments as well as the nuclear basket
deprives the NPC of its transport selectivity and thus leads to disruption of
selective nucleocytoplasmic cross-talk. This in turn promotes the exchange
of apoptotic factors between the cytosol and the nucleus. Simultaneous
degradation of the nuclear lamina cuts off the cross-talk between the
chromatin and the nuclear envelope and leads to a destabilisation of the cell
nucleus, ultimately promoting nuclear collapse.
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