Complement-mediated killing of bacteria by mechanical destabilization of the cell envelope
Complement-mediated killing of bacteria by mechanical destabilization of the cell envelope
复制标题
通过细胞膜的机械不稳定来补体介导的细菌杀灭
DOI:
10.1101/2023.12.10.570986
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Benn G
中科院分区:
文献类型:
--
作者:
Benn G
Complement proteins eliminate Gram-negative bacteria in serum via the formation of membrane attack complex (MAC) pores in the outer membrane. However, it remains unclear how outer membrane poration leads to inner membrane permeation and cell lysis. Using atomic force microscopy (AFM) on livingEscherichia coli(E. coli), we probed MAC-induced changes in the cell envelope and correlated these with subsequent cell death. Initially, bacteria survived despite the formation of hundreds of MACs randomly distributed over the cell surface. This was followed by larger-scale disruption of the outer membrane, including propagating defects and fractures, and by an overall swelling and stiffening of the bacterial surface, which precede inner membrane permeation. We conclude that bacterial cell lysis is only an indirect effect of MAC formation; outer membrane poration leads to mechanical destabilization of the cell envelope, reducing its ability to contain the turgor pressure, causing inner membrane permeation and cell death. This represents a previously unknown route to bacterial cell death that could be exploited by novel antibiotic treatments.
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DOI:
10.1016/j.bbapap.2008.11.005
发表时间:
2009-05
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
Delcour AH
通讯作者:
Delcour AH
DOI:
10.1101/685024
发表时间:
2019-07
期刊:
The Analyst
影响因子:
--
作者:
Georgina Benn;Alice L. B. Pyne;M. Ryadnov;B. Hoogenboom
通讯作者:
Georgina Benn;Alice L. B. Pyne;M. Ryadnov;B. Hoogenboom
影响因子:
7.2
作者:
Silhavy, Thomas J.;Kahne, Daniel;Walker, Suzanne
通讯作者:
Walker, Suzanne
影响因子:
7.3
作者:
Barnum SR;Bubeck D;Schein TN
通讯作者:
Schein TN
DOI:
--
发表时间:
1981
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Wright,SD;Levine,RP
通讯作者:
Levine,RP