Gasdermin D pores are dynamically regulated by local phosphoinositide circuitry.
Gasdermin D pores are dynamically regulated by local phosphoinositide circuitry.
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DOI:
10.1038/s41467-021-27692-9
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发表时间:
2022-01-10
影响因子:
16.6
通讯作者:
Mo GCH
中科院分区:
文献类型:
--
作者:
Santa Cruz Garcia AB;Schnur KP;Malik AB;Mo GCH
Gasdermin D forms large, ~21 nm diameter pores in the plasma membrane to drive the cell death program pyroptosis. These pores are thought to be permanently open, and the resultant osmotic imbalance is thought to be highly damaging. Yet some cells mitigate and survive pore formation, suggesting an undiscovered layer of regulation over the function of these pores. However, no methods exist to directly reveal these mechanistic details. Here, we combine optogenetic tools, live cell fluorescence biosensing, and electrophysiology to demonstrate that gasdermin pores display phosphoinositide-dependent dynamics. We quantify repeated and fast opening-closing of these pores on the tens of seconds timescale, visualize the dynamic pore geometry, and identify the signaling that controls dynamic pore activity. The identification of this circuit allows pharmacological tuning of pyroptosis and control of inflammatory cytokine release by living cells. During pyroptosis, gasdermin D (GSDMD) forms plasma membrane pores that initiate cell lysis. Here, the authors develop optogenetically activatable human GSDMD to assess GSDMD pore behavior and show that they are dynamic and can close, which can be a pyroptosis regulatory mechanism.
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影响因子:
7
作者:
DiPeso L;Ji DX;Vance RE;Price JV
通讯作者:
Price JV
影响因子:
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DOI:
10.1073/pnas.1204917109
发表时间:
2012-07-03
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