Programmable Bacteria with Dynamic Virulence Modulation System for Precision Antitumor Immunity
Abstract: Engineered bacteria‐mediated antitumor approaches have been proposed as promising immunotherapies for cancer. However, the off‐target bacterial toxicity narrows the therapeutic window. Living microbes will benefit from their controllable immunogenicity within tumors for safer antitumor applications. In this study, a genetically encoded microbial activation strategy is reported that uses tunable and dynamic expression of surface extracellular polysaccharides to improve bacterial biocompatibility while retaining therapeutic efficacy. Based on screening of genes associated with Salmonella survival in macrophages, a novel attenuated Salmonella chassis strain AIS (htrA gene‐deficient) highly enriched in tumors after administration and rapidly cleared from normal organs are reported. Subsequently, an engineered bacterial strain, AISI‐H, is constructed based on the AIS strain and an optimized quorum‐sensing regulatory system. The AISI‐H strain can achieve recovery of dynamic tumor‐specific bacterial virulence through a novel HTRA‐RCSA axis‐based and quorum‐sensing synthetic gene circuit‐mediated increase in extracellular polysaccharide content. These strains act “off” in normal organs to avoid unwanted immune activation and “on” in tumors for precise tumor suppression in mice. The AISI‐H strain shows significant tumor inhibition and potent activation of anticancer immunity in a melanoma mouse model. The AISI‐H strain exhibits excellent biocompatibility. This bacterial regulation strategy expands the applications of microbe‐based antitumor therapeutics.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Programmable Bacteria with Dynamic Virulence Modulation System for Precision Antitumor Immunity ; day:26 ; month:07 ; year:2024 ; extent:18
Advanced science ; (26.07.2024) (gesamt 18)
- Creator
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Wu, Leyang
Li, Lin
Qiao, Liyuan
Li, Chenyang
Zhang, Shuhui
Yin, Xingpeng
Du, Zengzheng
Sun, Ying
Qiu, Jiahui
Chang, Xiaoyao
Wang, Bohao
Hua, Zichun
- DOI
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10.1002/advs.202404069
- URN
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urn:nbn:de:101:1-2407271413298.725158544616
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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14.08.2025, 10:58 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Wu, Leyang
- Li, Lin
- Qiao, Liyuan
- Li, Chenyang
- Zhang, Shuhui
- Yin, Xingpeng
- Du, Zengzheng
- Sun, Ying
- Qiu, Jiahui
- Chang, Xiaoyao
- Wang, Bohao
- Hua, Zichun
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