Programming controlled adhesion of E. coli to target surfaces, cells, and tumors with synthetic adhesins.

Programming controlled adhesion of E. coli to target surfaces, cells, and tumors with synthetic adhesins.
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DOI:
10.1021/sb500252a
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发表时间:
2015-04-17
影响因子:
4.7
通讯作者:
Fernandez, Luis Angel
Fernandez, Luis Angel
中科院分区:
生物学2区
文献类型:
--
作者:
Pinero-Lambea, Carlos;Bodelon, Gustavo;Fernandez-Perianez, Rodrigo;Cuesta, Angel M.;Alvarez-Vallina, Luis;Fernandez, Luis Angel

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在这项工作中,我们报告了合成粘附素(SAS),使其能够合理设计大肠杆菌的粘附性。SA具有模块化结构,包括用于外膜锚定的稳定的β结构域和表面暴露的具有高亲和力和特异性的免疫球蛋白结构域,这些结构域可从大型谱系中选择。SA在缺乏一组保守的天然粘附素的大肠杆菌菌株中结构性和稳定地表达,引导细菌对靶向抗原表面和细胞的强大、快速和特异的黏附。我们在体内证明了SA的功能,表明与野生型大肠杆菌相比,较低剂量的工程大肠杆菌足以在表达SA识别的抗原的实体肿瘤中定植。此外,在非靶标组织中发现的工程菌水平较低。因此,SA为使用活细菌的不同应用提供了稳定和特定的大肠杆菌与目标表面的黏附能力。
In this work we report synthetic adhesins (SAs) enabling the rational design of the adhesion properties of E. coli. SAs have a modular structure comprising a stable β-domain for outer membrane anchoring and surface-exposed immunoglobulin domains with high affinity and specificity that can be selected from large repertoires. SAs are constitutively and stably expressed in an E. coli strain lacking a conserved set of natural adhesins, directing a robust, fast, and specific adhesion of bacteria to target antigenic surfaces and cells. We demonstrate the functionality of SAs in vivo, showing that, compared to wild type E. coli, lower doses of engineered E. coli are sufficient to colonize solid tumors expressing an antigen recognized by the SA. In addition, lower levels of engineered bacteria were found in non-target tissues. Therefore, SAs provide stable and specific adhesion capabilities to E. coli against target surfaces of interest for diverse applications using live bacteria.
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