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Development of a Hepatitis B Virus Reporter System to Monitor the Early Stages of the Replication Cycle
Published on: February 1, 2017
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Engineering Cellular Biosensors with Customizable Antiviral Responses Targeting Hepatitis B Virus
Satoko Matsunaga1, Sundararaj S Jeremiah1, Kei Miyakawa1
1Department of Microbiology, Yokohama City University School of Medicine, 3-9 Fuku-ura, Kanazawa-ku, Yokohama 236-0004, Japan.
Iscience
|February 28, 2020
Summary
Researchers engineered a novel synNotch receptor to detect Hepatitis B virus (HBV) and HBs antigens. This engineered immunity approach enables targeted cellular immunotherapy against viral infections.
Area of Science:
- Synthetic biology
- Immunology
- Virology
Background:
- SynNotch receptor technology offers programmable input/output functions in mammalian cells.
- This technology combines a regulatory notch core with an extracellular antibody fragment (scFv) and an intracellular transcription factor.
Purpose of the Study:
- To design and utilize a novel synNotch receptor for sensing Hepatitis B virus (HBV) and HBs antigens.
- To develop a cellular immunotherapy platform for viral infections using engineered immunity.
Main Methods:
- Constructed a synNotch receptor with an scFv targeting HBs antigen and an artificial transcription factor.
- Expressed the synNotch receptor in cells for sensing HBV particles and membrane-bound HBs antigens.
- Programmed cells to express reporter molecules (secNL, GFP) and antiviral factors (interferon, chimeric antibodies).
Main Results:
- SynNotch receptor-expressing cells successfully sensed HBV particles and HBs antigens.
- Cells responded by expressing reporter genes and releasing antiviral effectors.
- Demonstrated synNotch signaling efficacy with membrane-bound ligands, including enveloped viruses and liposomal proteins.
Conclusions:
- SynNotch receptor technology is effective for sensing enveloped viral particles and membrane-bound antigens.
- Established the concept of "engineered immunity" using the synNotch platform for viral immunotherapy.
- This platform holds potential for developing novel cellular therapies against viral infections.
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