Oncolytic adenovirus programmed by synthetic gene circuit for cancer immunotherapy

Huiya Huang, Yiqi Liu, Weixi Liao, Yubing Cao, Qiang Liu, Yakun Guo, Yinying Lu and Zhen Xie ()
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Huiya Huang: Tsinghua University
Yiqi Liu: Syngentech Inc., Zhongguancun Life Science Park
Weixi Liao: Tsinghua University
Yubing Cao: Syngentech Inc., Zhongguancun Life Science Park
Qiang Liu: Syngentech Inc., Zhongguancun Life Science Park
Yakun Guo: Syngentech Inc., Zhongguancun Life Science Park
Yinying Lu: The 5th medical center of PLA Genaral Hospital
Zhen Xie: Tsinghua University

Nature Communications, 2019, vol. 10, issue 1, 1-15

Abstract: Abstract Improving efficacy of oncolytic virotherapy remains challenging due to difficulty increasing specificity and immune responses against cancer and limited understanding of its population dynamics. Here, we construct programmable and modular synthetic gene circuits to control adenoviral replication and release of immune effectors selectively in hepatocellular carcinoma cells in response to multiple promoter and microRNA inputs. By performing mouse model experiments and computational simulations, we find that replicable adenovirus has a superior tumor-killing efficacy than non-replicable adenovirus. We observe a synergistic effect on promoting local lymphocyte cytotoxicity and systematic vaccination in immunocompetent mouse models by combining tumor lysis and secretion of immunomodulators. Furthermore, our computational simulations show that oncolytic virus which encodes immunomodulators can exert a more robust therapeutic efficacy than combinatorial treatment with oncolytic virus and immune effector. Our results provide an effective strategy to engineer oncolytic adenovirus, which may lead to innovative immunotherapies for a variety of cancers.

Date: 2019
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DOI: 10.1038/s41467-019-12794-2

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