Single-cell and population NF-κB dynamic responses depend on lipopolysaccharide preparation.

Single-cell and population NF-κB dynamic responses depend on lipopolysaccharide preparation.
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单细胞和种群NF-κB动态反应取决于脂多糖的制备。

DOI:
10.1371/journal.pone.0053222
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Covert MW
Covert MW
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Gutschow MV;Hughey JJ;Ruggero NA;Bajar BT;Valle SD;Covert MW

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Lipopolysaccharide (LPS), found in the outer membrane of gram-negative bacteria, elicits a strong response from the transcription factor family Nuclear factor (NF)-κB via Toll-like receptor (TLR) 4. The cellular response to lipopolysaccharide varies depending on the source and preparation of the ligand, however. Our goal was to compare single-cell NF-κB dynamics across multiple sources and concentrations of LPS. Using live-cell fluorescence microscopy, we determined the NF-κB activation dynamics of hundreds of single cells expressing a p65-dsRed fusion protein. We used computational image analysis to measure the nuclear localization of the fusion protein in the cells over time. The concentration range spanned up to nine orders of magnitude for three E. coli LPS preparations. We find that the LPS preparations induce markedly different responses, even accounting for potency differences. We also find that the ability of soluble TNF receptor to affect NF-κB dynamics varies strikingly across the three preparations. Our work strongly suggests that the cellular response to LPS is highly sensitive to the source and preparation of the ligand. We therefore caution that conclusions drawn from experiments using one preparation may not be applicable to LPS in general.
单细胞 NF-kappaB 动力学揭示了数字激活和模拟信息处理。
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