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Barnes C, Scheideler O, Schaffer D. Engineering the AAV capsid to evade immune responses. Curr Opin Biotechnol 2019; 60:99-103. [PMID: 30807882 DOI: 10.1016/j.copbio.2019.01.002] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 01/07/2019] [Indexed: 12/13/2022]
Abstract
Gene therapy is progressively emerging as a promising and powerful therapeutic modality, and adeno-associated virus (AAV) is a major delivery vehicle for such therapies. Among the most significant challenges that limit AAV's utility, however, is the immune response it elicits. Antibodies elicited by prior exposure to natural virus or vector can bind to an AAV vector, preventing it from entering the cell. Furthermore, even if AAV manages to infect a target cell, these cells can then be attenuated by lymphocytes. Improvements in our understanding of how the immune system responds to AAV have guided engineering of the capsid to reduce those responses, yielding capsid variants that are much stealthier and more effective. This review summarizes recent advances in understanding the immune response to AAV as well as highlights engineering methods that enhance AAV's potential as a gene therapy vector.
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Affiliation(s)
- Christopher Barnes
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA, USA
| | - Olivia Scheideler
- Department of Bioengineering, University of California, Berkeley, CA, USA; The UC Berkeley-UCSF Graduate Program in Bioengineering, University of California, Berkeley, CA 94720, USA
| | - David Schaffer
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA, USA; Department of Bioengineering, University of California, Berkeley, CA, USA; The Helen Wills Neuroscience Institute, University of California, Berkeley, CA, USA; Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA.
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Lee JH, Fan B, Samdin TD, Monteiro DA, Desai MS, Scheideler O, Jin HE, Kim S, Lee SW. Phage-Based Structural Color Sensors and Their Pattern Recognition Sensing System. ACS Nano 2017; 11:3632-3641. [PMID: 28355060 DOI: 10.1021/acsnano.6b07942] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The mammalian olfactory system provides great inspiration for the design of intelligent sensors. To this end, we have developed a bioinspired phage nanostructure-based color sensor array and a smartphone-based sensing network system. Using a M13 bacteriophage (phage) as a basic building block, we created structural color matrices that are composed of liquid-crystalline bundled nanofibers from self-assembled phages. The phages were engineered to express cross-responsive receptors on their major coat protein (pVIII), leading to rapid, detectable color changes upon exposure to various target chemicals, resulting in chemical- and concentration-dependent color fingerprints. Using these sensors, we have successfully detected 5-90% relative humidity with 0.2% sensitivity. In addition, after modification with aromatic receptors, we were able to distinguish between various structurally similar toxic chemicals including benzene, toluene, xylene, and aniline. Furthermore, we have developed a method of interpreting and disseminating results from these sensors using smartphones to establish a wireless system. Our phage-based sensor system has the potential to be very useful in improving national security and monitoring the environment and human health.
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Affiliation(s)
- Ju Hun Lee
- Department of Bioengineering, University of California , Berkeley, California 94720, United States
- Biological Systems and Engineering, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Benson Fan
- Bioinspira Inc. , Berkeley, California 94720, United States
| | - Tuan D Samdin
- Department of Molecular and Cell Biology, University of California , Berkeley, California 94720, United States
| | - David A Monteiro
- Department of Bioengineering, University of California , Berkeley, California 94720, United States
- University of California, Berkeley-University of California, San Francisco Graduate Program in Bioengineering, University of California , Berkeley, California 94720, United States
| | - Malav S Desai
- Department of Bioengineering, University of California , Berkeley, California 94720, United States
- Biological Systems and Engineering, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Olivia Scheideler
- Department of Bioengineering, University of California , Berkeley, California 94720, United States
- Biological Systems and Engineering, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Hyo-Eon Jin
- Department of Bioengineering, University of California , Berkeley, California 94720, United States
- Biological Systems and Engineering, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- College of Pharmacy, Ajou University , Suwon 16499, Republic of Korea
| | - Soyoun Kim
- Department of Biomedical Engineering, Dongguk University , Seoul 04620, Republic of Korea
| | - Seung-Wuk Lee
- Department of Bioengineering, University of California , Berkeley, California 94720, United States
- Biological Systems and Engineering, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- Tsinghua-Berkeley Shenzhen Institute , Shenzhen, People's Republic of China
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Kamimura M, Scheideler O, Shimizu Y, Yamamoto S, Yamaguchi K, Nakanishi J. Facile preparation of a photoactivatable surface on a 96-well plate: a versatile and multiplex cell migration assay platform. Phys Chem Chem Phys 2015; 17:14159-67. [DOI: 10.1039/c5cp01499a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel photoactivatable 96-well plate based on photocleavable PEG and poly-d-lysine serves as a useful high-throughput cell migration assay platform.
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Affiliation(s)
- Masao Kamimura
- World Premier International (WPI) Research Center Initiative
- International Center for Materials Nanoarchitectonics (MANA)
- National Institute for Materials Science (NIMS)
- Tsukuba 305-0044
- Japan
| | - Olivia Scheideler
- World Premier International (WPI) Research Center Initiative
- International Center for Materials Nanoarchitectonics (MANA)
- National Institute for Materials Science (NIMS)
- Tsukuba 305-0044
- Japan
| | - Yoshihisa Shimizu
- World Premier International (WPI) Research Center Initiative
- International Center for Materials Nanoarchitectonics (MANA)
- National Institute for Materials Science (NIMS)
- Tsukuba 305-0044
- Japan
| | - Shota Yamamoto
- Department of Chemistry
- Faculty of Science
- Research Institute for Photofunctionalized Materials
- Kanagawa University
- Hiratsuka
| | - Kazuo Yamaguchi
- Department of Chemistry
- Faculty of Science
- Research Institute for Photofunctionalized Materials
- Kanagawa University
- Hiratsuka
| | - Jun Nakanishi
- World Premier International (WPI) Research Center Initiative
- International Center for Materials Nanoarchitectonics (MANA)
- National Institute for Materials Science (NIMS)
- Tsukuba 305-0044
- Japan
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Ramos J, Potta T, Scheideler O, Rege K. Parallel synthesis of poly(amino ether)-templated plasmonic nanoparticles for transgene delivery. ACS Appl Mater Interfaces 2014; 6:14861-14873. [PMID: 25084138 PMCID: PMC4160262 DOI: 10.1021/am5017073] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Accepted: 08/01/2014] [Indexed: 06/03/2023]
Abstract
Plasmonic nanoparticles have been increasingly investigated for numerous applications in medicine, sensing, and catalysis. In particular, gold nanoparticles have been investigated for separations, sensing, drug/nucleic acid delivery, and bioimaging. In addition, silver nanoparticles demonstrate antibacterial activity, resulting in potential application in treatments against microbial infections, burns, diabetic skin ulcers, and medical devices. Here, we describe the facile, parallel synthesis of both gold and silver nanoparticles using a small set of poly(amino ethers), or PAEs, derived from linear polyamines, under ambient conditions and in absence of additional reagents. The kinetics of nanoparticle formation were dependent on PAE concentration and chemical composition. In addition, yields were significantly greater in case of PAEs when compared to 25 kDa poly(ethylene imine), which was used as a standard catonic polymer. Ultraviolet radiation enhanced the kinetics and the yield of both gold and silver nanoparticles, likely by means of a coreduction effect. PAE-templated gold nanoparticles demonstrated the ability to deliver plasmid DNA, resulting in transgene expression, in 22Rv1 human prostate cancer and MB49 murine bladder cancer cell lines. Taken together, our results indicate that chemically diverse poly(amino ethers) can be employed for rapidly templating the formation of metal nanoparticles under ambient conditions. The simplicity of synthesis and chemical diversity make PAE-templated nanoparticles useful tools for several applications in biotechnology, including nucleic acid delivery.
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Affiliation(s)
- James Ramos
- Biomedical
Engineering, School of Biological and Health Systems Engineering, Arizona State University, Tempe, Arizona 85287-6106, United States
| | - Thrimoorthy Potta
- Chemical
Engineering, School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, Arizona 85287-6106, United States
| | - Olivia Scheideler
- Department
of Biological Systems Engineering, University
of Nebraska—Lincoln, Lincoln, Nebraska 68583-0726, United States
| | - Kaushal Rege
- Chemical
Engineering, School for Engineering of Matter, Transport, and Energy, Arizona State University, Tempe, Arizona 85287-6106, United States
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