201
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Sedighi M, Zahedi Bialvaei A, Hamblin MR, Ohadi E, Asadi A, Halajzadeh M, Lohrasbi V, Mohammadzadeh N, Amiriani T, Krutova M, Amini A, Kouhsari E. Therapeutic bacteria to combat cancer; current advances, challenges, and opportunities. Cancer Med 2019; 8:3167-3181. [PMID: 30950210 PMCID: PMC6558487 DOI: 10.1002/cam4.2148] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 03/17/2019] [Accepted: 03/20/2019] [Indexed: 12/26/2022] Open
Abstract
Successful treatment of cancer remains a challenge, due to the unique pathophysiology of solid tumors, and the predictable emergence of resistance. Traditional methods for cancer therapy including radiotherapy, chemotherapy, and immunotherapy all have their own limitations. A novel approach is bacteriotherapy, either used alone, or in combination with conventional methods, has shown a positive effect on regression of tumors and inhibition of metastasis. Bacteria-assisted tumor-targeted therapy used as therapeutic/gene/drug delivery vehicles has great promise in the treatment of tumors. The use of bacteria only, or in combination with conventional methods was found to be effective in some experimental models of cancer (tumor regression and increased survival rate). In this article, we reviewed the major advantages, challenges, and prospective directions for combinations of bacteria with conventional methods for tumor therapy.
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Affiliation(s)
- Mansour Sedighi
- Department of Microbiology, School of MedicineIran University of Medical SciencesTehranIran
| | - Abed Zahedi Bialvaei
- Department of Microbiology, School of MedicineIran University of Medical SciencesTehranIran
| | - Michael R. Hamblin
- Wellman Center for PhotomedicineMassachusetts General HospitalBostonMassachusetts
- Department of DermatologyHarvard Medical SchoolBostonMassachusetts
- Harvard‐MIT Division of Health Sciences and TechnologyCambridgeMassachusetts
| | - Elnaz Ohadi
- Department of Microbiology, School of MedicineIran University of Medical SciencesTehranIran
| | - Arezoo Asadi
- Department of Microbiology, School of MedicineIran University of Medical SciencesTehranIran
| | - Masoumeh Halajzadeh
- Department of Microbiology, School of MedicineIran University of Medical SciencesTehranIran
| | - Vahid Lohrasbi
- Department of Microbiology, School of MedicineIran University of Medical SciencesTehranIran
| | - Nima Mohammadzadeh
- Department of Microbiology, School of MedicineIran University of Medical SciencesTehranIran
| | - Taghi Amiriani
- Golestan Research Center of Gastroenterology and HepatologyGolestan University of Medical SciencesGorganIran
| | - Marcela Krutova
- 2nd Faculty of Medicine, Department of Medical MicrobiologyCharles University and Motol University HospitalPragueCzech Republic
| | - Abolfazl Amini
- Laboratory Sciences Research CenterGolestan University of Medical SciencesGorganIran
| | - Ebrahim Kouhsari
- Department of Microbiology, School of MedicineIran University of Medical SciencesTehranIran
- Laboratory Sciences Research CenterGolestan University of Medical SciencesGorganIran
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202
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Tian LJ, Min Y, Li WW, Chen JJ, Zhou NQ, Zhu TT, Li DB, Ma JY, An PF, Zheng LR, Huang H, Liu YZ, Yu HQ. Substrate Metabolism-Driven Assembly of High-Quality CdS xSe 1- x Quantum Dots in Escherichia coli: Molecular Mechanisms and Bioimaging Application. ACS NANO 2019; 13:5841-5851. [PMID: 30969107 DOI: 10.1021/acsnano.9b01581] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Biosynthesis offers opportunities for cost-effective and sustainable production of semiconductor quantum dots (QDs), but is currently restricted by poor controllability on the synthesis process, resulting from limited knowledge on the assembly mechanisms and the lack of effective control strategies. In this work, we provide molecular-level insights into the formation mechanism of biogenic QDs (Bio-QDs) and its connection with the cellular substrate metabolism in Escherichia coli. Strengthening the substrate metabolism for producing more reducing power was found to stimulate the production of several reduced thiol-containing proteins (including glutaredoxin and thioredoxin) that play key roles in Bio-QDs assembly. This effectively diverted the transformation route of the selenium (Se) and cadmium (Cd) metabolic from Cd3(PO4)2 formation to CdS xSe1- x QDs assembly, yielding fine-sized (2.0 ± 0.4 nm), high-quality Bio-QDs with quantum yield (5.2%) and fluorescence lifetime (99.19 ns) far exceeding the existing counterparts. The underlying mechanisms of Bio-QDs crystallization and development were elucidated by density functional theory calculations and molecular dynamics simulation. The resulting Bio-QDs were successfully used for bioimaging of cancer cells and tumor tissue of mice without extra modification. Our work provides fundamental knowledge on the Bio-QDs assembly mechanisms and proposes an effective, facile regulation strategy, which may inspire advances in controlled synthesis and practical applications of Bio-QDs as well as other bionanomaterials.
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Affiliation(s)
- Li-Jiao Tian
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Yuan Min
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Wen-Wei Li
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Jie-Jie Chen
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Nan-Qing Zhou
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Ting-Ting Zhu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Dao-Bo Li
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Jing-Yuan Ma
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics , Chinese Academy of Sciences , Shanghai 201204 , China
| | - Peng-Fei An
- Beijing Synchrotron Radiation Laboratory, Institute of High Energy Physics , Chinese Academy of Science , Beijing 100049 , China
| | - Li-Rong Zheng
- Beijing Synchrotron Radiation Laboratory, Institute of High Energy Physics , Chinese Academy of Science , Beijing 100049 , China
| | - Hai Huang
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Yang-Zhong Liu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei 230026 , China
| | - Han-Qing Yu
- CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry , University of Science and Technology of China , Hefei 230026 , China
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203
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Development of bacteria as diagnostics and therapeutics by genetic engineering. J Microbiol 2019; 57:637-643. [DOI: 10.1007/s12275-019-9105-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 04/08/2019] [Accepted: 04/11/2019] [Indexed: 12/11/2022]
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204
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Harimoto T, Singer ZS, Velazquez OS, Zhang J, Castro S, Hinchliffe TE, Mather W, Danino T. Rapid screening of engineered microbial therapies in a 3D multicellular model. Proc Natl Acad Sci U S A 2019; 116:9002-9007. [PMID: 30996123 PMCID: PMC6500119 DOI: 10.1073/pnas.1820824116] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Synthetic biology is transforming therapeutic paradigms by engineering living cells and microbes to intelligently sense and respond to diseases including inflammation, infections, metabolic disorders, and cancer. However, the ability to rapidly engineer new therapies far outpaces the throughput of animal-based testing regimes, creating a major bottleneck for clinical translation. In vitro approaches to address this challenge have been limited in scalability and broad applicability. Here, we present a bacteria-in-spheroid coculture (BSCC) platform that simultaneously tests host species, therapeutic payloads, and synthetic gene circuits of engineered bacteria within multicellular spheroids over a timescale of weeks. Long-term monitoring of bacterial dynamics and disease progression enables quantitative comparison of critical therapeutic parameters such as efficacy and biocontainment. Specifically, we screen Salmonella typhimurium strains expressing and delivering a library of antitumor therapeutic molecules via several synthetic gene circuits. We identify candidates exhibiting significant tumor reduction and demonstrate high similarity in their efficacies, using a syngeneic mouse model. Last, we show that our platform can be expanded to dynamically profile diverse microbial species including Listeria monocytogenes, Proteus mirabilis, and Escherichia coli in various host cell types. This high-throughput framework may serve to accelerate synthetic biology for clinical applications and for understanding the host-microbe interactions in disease sites.
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Affiliation(s)
- Tetsuhiro Harimoto
- Department of Biomedical Engineering, Columbia University, New York, NY 10027
| | - Zakary S Singer
- Department of Biomedical Engineering, Columbia University, New York, NY 10027
| | - Oscar S Velazquez
- Department of Biomedical Engineering, Columbia University, New York, NY 10027
| | - Joanna Zhang
- Department of Biomedical Engineering, Columbia University, New York, NY 10027
| | - Samuel Castro
- Department of Biomedical Engineering, Columbia University, New York, NY 10027
| | - Taylor E Hinchliffe
- Department of Biomedical Engineering, Columbia University, New York, NY 10027
| | - William Mather
- BioCircuits Institute, University of California, San Diego, La Jolla, CA 92093
| | - Tal Danino
- Department of Biomedical Engineering, Columbia University, New York, NY 10027;
- Data Science Institute, Columbia University, New York, NY 10027
- Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY 10027
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205
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Xia PF, Ling H, Foo JL, Chang MW. Synthetic genetic circuits for programmable biological functionalities. Biotechnol Adv 2019; 37:107393. [PMID: 31051208 DOI: 10.1016/j.biotechadv.2019.04.015] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Revised: 04/09/2019] [Accepted: 04/28/2019] [Indexed: 02/06/2023]
Abstract
Living organisms evolve complex genetic networks to interact with the environment. Due to the rapid development of synthetic biology, various modularized genetic parts and units have been identified from these networks. They have been employed to construct synthetic genetic circuits, including toggle switches, oscillators, feedback loops and Boolean logic gates. Building on these circuits, complex genetic machines with capabilities in programmable decision-making could be created. Consequently, these accomplishments have led to novel applications, such as dynamic and autonomous modulation of metabolic networks, directed evolution of biological units, remote and targeted diagnostics and therapies, as well as biological containment methods to prevent release of engineered microorganisms and genetic materials. Herein, we outline the principles in genetic circuit design that have initiated a new chapter in transforming concepts to realistic applications. The features of modularized building blocks and circuit architecture that facilitate realization of circuits for a variety of novel applications are discussed. Furthermore, recent advances and challenges in employing genetic circuits to impart microorganisms with distinct and programmable functionalities are highlighted. We envision that this review gives new insights into the design of synthetic genetic circuits and offers a guideline for the implementation of different circuits in various aspects of biotechnology and bioengineering.
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Affiliation(s)
- Peng-Fei Xia
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, 8 Medical Drive, Singapore 117597, Singapore; NUS Synthetic Biology for Clinical and Technological Innovation (SynCTI), National University of Singapore, 28 Medical Drive, Singapore 117456, Singapore
| | - Hua Ling
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, 8 Medical Drive, Singapore 117597, Singapore; NUS Synthetic Biology for Clinical and Technological Innovation (SynCTI), National University of Singapore, 28 Medical Drive, Singapore 117456, Singapore
| | - Jee Loon Foo
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, 8 Medical Drive, Singapore 117597, Singapore; NUS Synthetic Biology for Clinical and Technological Innovation (SynCTI), National University of Singapore, 28 Medical Drive, Singapore 117456, Singapore.
| | - Matthew Wook Chang
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, 8 Medical Drive, Singapore 117597, Singapore; NUS Synthetic Biology for Clinical and Technological Innovation (SynCTI), National University of Singapore, 28 Medical Drive, Singapore 117456, Singapore.
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206
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Pu J, Disare M, Dickinson BC. Evolution of C-Terminal Modification Tolerance in Full-Length and Split T7 RNA Polymerase Biosensors. Chembiochem 2019; 20:1547-1553. [PMID: 30694596 DOI: 10.1002/cbic.201800707] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 01/27/2019] [Indexed: 01/23/2023]
Abstract
T7 RNA polymerase (RNAP) is a powerful protein scaffold for the construction of synthetic biology tools and biosensors. However, both T7 RNAP and its split variants are intolerant to C-terminal modifications or fusions, thus placing a key limitation on their engineering and deployment. Here, we use rapid continuous-evolution approaches to evolve both full-length and split T7 RNAP variants that tolerate modified C termini and fusions to entire other proteins. Moreover, we show that the evolved split C-terminal RNAP variants can function as small-molecule biosensors, even in the context of large C-terminal fusions. This work provides a panel of modified RNAP variants with robust activity and tolerance to C-terminal fusions, and provides insights into the biophysical requirements of the C-terminal carboxylic acid functional group of T7 RNAP.
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Affiliation(s)
- Jinyue Pu
- Department of Chemistry, The University of Chicago, 929 E. 57th Street, Chicago, IL, 60637, USA
| | - Michael Disare
- Department of Chemistry, The University of Chicago, 929 E. 57th Street, Chicago, IL, 60637, USA
| | - Bryan C Dickinson
- Department of Chemistry, The University of Chicago, 929 E. 57th Street, Chicago, IL, 60637, USA
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207
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Abbott TR, Qi LS. Evolution at the Cutting Edge: CRISPR-Mediated Directed Evolution. Mol Cell 2019; 72:402-403. [PMID: 30388408 DOI: 10.1016/j.molcel.2018.10.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
In a recent issue of Nature, Halperin et al. (2018) develop a new technology to continuously diversify specific genomic loci by combining CRISPR-Cas9 with error-prone DNA polymerases.
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Affiliation(s)
- Timothy R Abbott
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA
| | - Lei S Qi
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA; Department of Chemical and Systems Biology, Stanford University, Stanford, CA 94305, USA; Stanford ChEM-H, Stanford University, Stanford, CA 94305, USA.
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208
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Blocking HIV-1 Infection by Chromosomal Integrative Expression of Human CD4 on the Surface of Lactobacillus acidophilus ATCC 4356. J Virol 2019; 93:JVI.01830-18. [PMID: 30728264 DOI: 10.1128/jvi.01830-18] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 01/27/2019] [Indexed: 12/13/2022] Open
Abstract
Lactobacillus bacteria are potential delivery vehicles for biopharmaceutical molecules because they are well-recognized as safe microorganisms that naturally inhabit the human body. The goal of this study was to employ these lactobacilli to combat human immunodeficiency virus type 1 (HIV-1) infection and transmission. By using a chromosomal integration method, we engineered Lactobacillus acidophilus ATCC 4356 to display human CD4, the HIV-1 receptor, on the cell surface. Since human CD4 can bind to any infectious HIV-1 particles, the engineered lactobacilli can potentially capture HIV-1 of different subtypes and prevent infection. Our data demonstrate that the CD4-carrying bacteria are able to adsorb HIV-1 particles and reduce infection significantly in vitro and also block intrarectal HIV-1 infection in a humanized mouse model in preliminary tests in vivo Our results support the potential of this approach to decrease the efficiency of HIV-1 sexual transmission.IMPORTANCE In the absence of an effective vaccine, alternative approaches to block HIV-1 infection and transmission with commensal bacteria expressing antiviral proteins are being considered. This report provides a proof-of-concept by using Lactobacillus bacteria stably expressing the HIV-1 receptor CD4 to capture and neutralize HIV-1 in vitro and in a humanized mouse model. The stable expression of antiviral proteins, such as CD4, following genomic integration of the corresponding genes into this Lactobacillus strain may contribute to the prevention of HIV-1 sexual transmission.
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209
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McCarty NS, Ledesma-Amaro R. Synthetic Biology Tools to Engineer Microbial Communities for Biotechnology. Trends Biotechnol 2019; 37:181-197. [PMID: 30497870 PMCID: PMC6340809 DOI: 10.1016/j.tibtech.2018.11.002] [Citation(s) in RCA: 227] [Impact Index Per Article: 45.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 11/02/2018] [Accepted: 11/05/2018] [Indexed: 12/16/2022]
Abstract
Microbial consortia have been used in biotechnology processes, including fermentation, waste treatment, and agriculture, for millennia. Today, synthetic biologists are increasingly engineering microbial consortia for diverse applications, including the bioproduction of medicines, biofuels, and biomaterials from inexpensive carbon sources. An improved understanding of natural microbial ecosystems, and the development of new tools to construct synthetic consortia and program their behaviors, will vastly expand the functions that can be performed by communities of interacting microorganisms. Here, we review recent advancements in synthetic biology tools and approaches to engineer synthetic microbial consortia, discuss ongoing and emerging efforts to apply consortia for various biotechnological applications, and suggest future applications.
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Affiliation(s)
- Nicholas S. McCarty
- Imperial College Centre for Synthetic Biology, Imperial College London, London SW7 2AZ, UK
| | - Rodrigo Ledesma-Amaro
- Imperial College Centre for Synthetic Biology, Imperial College London, London SW7 2AZ, UK
- Department of Bioengineering, Imperial College London, London SW7 2AZ, UK
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210
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P Teixeira A, Fussenegger M. Engineering mammalian cells for disease diagnosis and treatment. Curr Opin Biotechnol 2019; 55:87-94. [DOI: 10.1016/j.copbio.2018.08.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 08/11/2018] [Accepted: 08/17/2018] [Indexed: 12/11/2022]
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211
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Abstract
Biologics now constitute a significant element of available medical treatments. Owing to their clinical and commercial success, biologics are a rapidly growing class and have become a dominant therapeutic modality. Although most of the successful biologics to date are drugs that bear a peptidic backbone, ranging from small peptides to monoclonal antibodies (~500 residues; 150 kDa), new biologic modalities, such as nucleotide-based therapeutics and viral gene therapies, are rapidly maturing towards widespread clinical use. Given the rise of peptides and proteins in the pharmaceutical landscape, tremendous research and development interest exists in developing less-invasive or non-invasive routes for the systemic delivery of biologics, including subcutaneous, transdermal, oral, inhalation, nasal and buccal routes. This Review summarizes the current status, latest updates and future prospects for such delivery of peptides, proteins and other biologics.
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212
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Eetemadi A, Tagkopoulos I. Genetic Neural Networks: an artificial neural network architecture for capturing gene expression relationships. Bioinformatics 2018; 35:2226-2234. [DOI: 10.1093/bioinformatics/bty945] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 10/27/2018] [Accepted: 11/16/2018] [Indexed: 01/16/2023] Open
Abstract
Abstract
Motivation
Gene expression prediction is one of the grand challenges in computational biology. The availability of transcriptomics data combined with recent advances in artificial neural networks provide an unprecedented opportunity to create predictive models of gene expression with far reaching applications.
Results
We present the Genetic Neural Network (GNN), an artificial neural network for predicting genome-wide gene expression given gene knockouts and master regulator perturbations. In its core, the GNN maps existing gene regulatory information in its architecture and it uses cell nodes that have been specifically designed to capture the dependencies and non-linear dynamics that exist in gene networks. These two key features make the GNN architecture capable to capture complex relationships without the need of large training datasets. As a result, GNNs were 40% more accurate on average than competing architectures (MLP, RNN, BiRNN) when compared on hundreds of curated and inferred transcription modules. Our results argue that GNNs can become the architecture of choice when building predictors of gene expression from exponentially growing corpus of genome-wide transcriptomics data.
Availability and implementation
https://github.com/IBPA/GNN
Supplementary information
Supplementary data are available at Bioinformatics online.
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Affiliation(s)
- Ameen Eetemadi
- Department of Computer Science, University of California, Davis, CA, USA
- Genome Center, University of California, Davis, CA, USA
| | - Ilias Tagkopoulos
- Department of Computer Science, University of California, Davis, CA, USA
- Genome Center, University of California, Davis, CA, USA
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213
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Abstract
Measuring biological data across time and space is critical for understanding complex biological processes and for various biosurveillance applications. However, such data are often inaccessible or difficult to directly obtain. Less invasive, more robust and higher-throughput biological recording tools are needed to profile cells and their environments. DNA-based cellular recording is an emerging and powerful framework for tracking intracellular and extracellular biological events over time across living cells and populations. Here, we review and assess DNA recorders that utilize CRISPR nucleases, integrases and base-editing strategies, as well as recombinase and polymerase-based methods. Quantitative characterization, modelling and evaluation of these DNA-recording modalities can guide their design and implementation for specific application areas.
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Affiliation(s)
- Ravi U Sheth
- Department of Systems Biology, Columbia University Medical Center, New York, NY, USA
- Integrated Program in Cellular, Molecular and Biomedical Studies, Columbia University, New York, NY, USA
| | - Harris H Wang
- Department of Systems Biology, Columbia University Medical Center, New York, NY, USA.
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY, USA.
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214
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Cordero T, Rosado A, Majer E, Jaramillo A, Rodrigo G, Daròs JA. Boolean Computation in Plants Using Post-translational Genetic Control and a Visual Output Signal. ACS Synth Biol 2018; 7:2322-2330. [PMID: 30212620 DOI: 10.1021/acssynbio.8b00214] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Due to autotrophic growing capacity and extremely rich secondary metabolism, plants should be preferred targets of synthetic biology. However, developments in plants usually run below those in other taxonomic groups. In this work we engineered genetic circuits capable of logic YES, OR and AND Boolean computation in plant tissues with a visual output signal. The circuits, which are deployed by means of Agrobacterium tumefaciens, perform with the conditional activity of the MYB transcription factor Rosea1 from Antirrhinum majus inducing the accumulation of anthocyanins, plant endogenous pigments that are directly visible to the naked eye or accurately quantifiable by spectrophotometric analysis. The translational fusion of Rosea1 to several viral proteins, such as potyvirus NIb or fragments thereof, rendered the transcription factor inactive. However, anthocyanin accumulation could be restored by inserting protease cleavage sites between both moieties of the fusion and by coexpressing specific proteases, such as potyvirus nuclear inclusion a protease.
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Affiliation(s)
- Teresa Cordero
- Instituto de Biología Molecular y Celular de Plantas, CSIC-Universitat Politècnica de València, 46022 Valencia, Spain
| | - Arantxa Rosado
- Instituto de Biología Molecular y Celular de Plantas, CSIC-Universitat Politècnica de València, 46022 Valencia, Spain
- Institute for Integrative Systems Biology, Universitat de València-CSIC, 46980 Paterna, Spain
| | - Eszter Majer
- Instituto de Biología Molecular y Celular de Plantas, CSIC-Universitat Politècnica de València, 46022 Valencia, Spain
| | - Alfonso Jaramillo
- Institute for Integrative Systems Biology, Universitat de València-CSIC, 46980 Paterna, Spain
- Warwick Integrative Synthetic Biology Centre and School of Life Sciences, University of Warwick, Coventry CV4 7AL, U.K
- Institute of Systems and Synthetic Biology, Université d’Évry Val d’Essonne-CNRS, F-91000 Évry, France
| | - Guillermo Rodrigo
- Instituto de Biología Molecular y Celular de Plantas, CSIC-Universitat Politècnica de València, 46022 Valencia, Spain
- Institute for Integrative Systems Biology, Universitat de València-CSIC, 46980 Paterna, Spain
| | - José-Antonio Daròs
- Instituto de Biología Molecular y Celular de Plantas, CSIC-Universitat Politècnica de València, 46022 Valencia, Spain
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215
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Hay JJ, Rodrigo-Navarro A, Petaroudi M, Bryksin AV, García AJ, Barker TH, Dalby MJ, Salmeron-Sanchez M. Bacteria-Based Materials for Stem Cell Engineering. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1804310. [PMID: 30209838 DOI: 10.1002/adma.201804310] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 08/11/2018] [Indexed: 06/08/2023]
Abstract
Materials can be engineered to deliver specific biological cues that control stem cell growth and differentiation. However, current materials are still limited for stem cell engineering as stem cells are regulated by a complex biological milieu that requires spatiotemporal control. Here a new approach of using materials that incorporate designed bacteria as units that can be engineered to control human mesenchymal stem cells (hMSCs), in a highly dynamic-temporal manner, is presented. Engineered Lactococcus lactis spontaneously colonizes a variety of material surfaces (e.g., polymers, metals, and ceramics) and is able to maintain growth and induce differentiation of hMSCs in 2D/3D surfaces and hydrogels. Controlled, dynamic, expression of fibronectin fragments supports stem cell growth, whereas inducible-temporal regulation of secreted bone morphogenetic protein-2 drives osteogenesis in an on-demand manner. This approach enables stem cell technologies using material systems that host symbiotic interactions between eukaryotic and prokaryotic cells.
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Affiliation(s)
- Jake J Hay
- Centre for the Cellular Microenvironment, University of Glasgow, Glasgow, G12 8LT, UK
| | | | - Michaela Petaroudi
- Centre for the Cellular Microenvironment, University of Glasgow, Glasgow, G12 8LT, UK
| | - Anton V Bryksin
- Molecular Evolution Core Facility, Georgia Institute of Technology, 950 Atlantic Dr NW, Atlanta, GA 30332, USA
| | - Andrés J García
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 315 Ferst Dr NW, Atlanta, GA 30332, USA
| | - Thomas H Barker
- Department of Cell Biology, University of Virginia, 415 Lane Road, Charlottesville, Virginia, VA 22904, USA
| | - Matthew J Dalby
- Centre for the Cellular Microenvironment, University of Glasgow, Glasgow, G12 8LT, UK
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216
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Kim S, Kerns SJ, Ziesack M, Bry L, Gerber GK, Way JC, Silver PA. Quorum Sensing Can Be Repurposed To Promote Information Transfer between Bacteria in the Mammalian Gut. ACS Synth Biol 2018; 7:2270-2281. [PMID: 30125499 DOI: 10.1021/acssynbio.8b00271] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The gut microbiome is intricately involved with establishing and maintaining the health of the host. Engineering of gut microbes aims to add new functions and expand the scope of control over the gut microbiome. To create systems that can perform increasingly complex tasks in the gut, it is necessary to harness the ability of the bacteria to communicate in the gut environment. Interestingly, acyl-homoserine lactone (acyl-HSL)-mediated Gram-negative bacterial quorum sensing, a widely used mode of intercellular signaling system in nature, has not been identified in normal healthy mammalian gut. It remains unknown whether the gut bacteria that do not natively use quorum sensing can be engineered to successfully signal to other bacteria using acyl-HSLs in the gut environment. Here, we repurposed quorum sensing to create an information transfer system between native gut Escherichia coli and attenuated Salmonella enterica serovar Typhimurium. Specifically, we functionalized one species with inducible signal production and the other with signal detection and recording using genomically integrated circuits. The information transfer system demonstrated successful intra- and interspecies signaling in the murine gut. This study provides a basis for further understanding of interbacterial interactions in an otherwise hard-to-study environment as well as a basis for further investigation of the potential of acyl-HSLs as intercellular signaling molecules of engineered gut consortia.
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Affiliation(s)
- Suhyun Kim
- Department of Systems Biology, Harvard Medical School, Boston, Massachusetts 02115, United States
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, Massachusetts 02138, United States
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, Massachusetts 02115, United States
| | - S. Jordan Kerns
- Department of Systems Biology, Harvard Medical School, Boston, Massachusetts 02115, United States
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, Massachusetts 02115, United States
| | - Marika Ziesack
- Department of Systems Biology, Harvard Medical School, Boston, Massachusetts 02115, United States
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, Massachusetts 02115, United States
| | - Lynn Bry
- Department of Pathology, Brigham and Women’s Hospital, Boston, Massachusetts 02115, United States
| | - Georg K. Gerber
- Department of Pathology, Brigham and Women’s Hospital, Boston, Massachusetts 02115, United States
| | - Jeffrey C. Way
- Department of Systems Biology, Harvard Medical School, Boston, Massachusetts 02115, United States
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, Massachusetts 02115, United States
| | - Pamela A. Silver
- Department of Systems Biology, Harvard Medical School, Boston, Massachusetts 02115, United States
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, Massachusetts 02115, United States
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217
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Ramesh P, Hwang S, Davis HC, Lee‐Gosselin A, Bharadwaj V, English MA, Sheng J, Iyer V, Shapiro MG. Ultraparamagnetic Cells Formed through Intracellular Oxidation and Chelation of Paramagnetic Iron. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201805042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Pradeep Ramesh
- Division of Biology and Biological Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Son‐Jong Hwang
- Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Hunter C. Davis
- Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Audrey Lee‐Gosselin
- Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Vivek Bharadwaj
- Division of Engineering and Applied Science California Institute of Technology Pasadena CA 91125 USA
| | - Max A. English
- Division of Engineering and Applied Science California Institute of Technology Pasadena CA 91125 USA
| | - Jenny Sheng
- Division of Engineering and Applied Science California Institute of Technology Pasadena CA 91125 USA
| | - Vasant Iyer
- Division of Engineering and Applied Science California Institute of Technology Pasadena CA 91125 USA
| | - Mikhail G. Shapiro
- Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
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218
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Ramesh P, Hwang SJ, Davis HC, Lee-Gosselin A, Bharadwaj V, English MA, Sheng J, Iyer V, Shapiro MG. Ultraparamagnetic Cells Formed through Intracellular Oxidation and Chelation of Paramagnetic Iron. Angew Chem Int Ed Engl 2018; 57:12385-12389. [PMID: 30089191 DOI: 10.1002/anie.201805042] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 07/03/2018] [Indexed: 12/19/2022]
Abstract
Making cells magnetic is a long-standing goal of chemical biology, aiming to enable the separation of cells from complex biological samples and their visualization in vivo using magnetic resonance imaging (MRI). Previous efforts towards this goal, focused on engineering cells to biomineralize superparamagnetic or ferromagnetic iron oxides, have been largely unsuccessful due to the stringent required chemical conditions. Here, we introduce an alternative approach to making cells magnetic, focused on biochemically maximizing cellular paramagnetism. We show that a novel genetic construct combining the functions of ferroxidation and iron chelation enables engineered bacterial cells to accumulate iron in "ultraparamagnetic" macromolecular complexes, allowing these cells to be trapped with magnetic fields and imaged with MRI in vitro and in vivo. We characterize the properties of these cells and complexes using magnetometry, nuclear magnetic resonance, biochemical assays, and computational modeling to elucidate the unique mechanisms and capabilities of this paramagnetic concept.
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Affiliation(s)
- Pradeep Ramesh
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Son-Jong Hwang
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Hunter C Davis
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Audrey Lee-Gosselin
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Vivek Bharadwaj
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Max A English
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Jenny Sheng
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Vasant Iyer
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, 91125, USA
| | - Mikhail G Shapiro
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125, USA
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219
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Vargason AM, Anselmo AC. Clinical translation of microbe-based therapies: Current clinical landscape and preclinical outlook. Bioeng Transl Med 2018; 3:124-137. [PMID: 30065967 PMCID: PMC6063871 DOI: 10.1002/btm2.10093] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 04/23/2018] [Accepted: 04/26/2018] [Indexed: 12/11/2022] Open
Abstract
Next generation microbe-based therapeutics, inspired by the success of fecal microbiota transplants, are being actively investigated in clinical trials to displace or eliminate pathogenic microbes to treat various diseases in the gastrointestinal tract, skin, and vagina. Genetically engineered microbes are also being investigated in the clinic as drug producing factories for biologic delivery, which can provide a constant local source of drugs. In either case, microbe-therapeutics have the opportunity to address unmet clinical needs and open new areas of research by reducing clinical side effects associated with current treatment modalities or by facilitating the delivery of biologics. This review will discuss examples of past and current clinical trials that are investigating microbe-therapeutics, both microbiome-modulating and drug-producing, for the treatment of a range of diseases. We then offer a perspective on how preclinical approaches, both those focused on developing advanced delivery systems and those that use in vitro microbiome model systems to inform formulation design, will lead to the realization of next-generation microbe-therapeutics.
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Affiliation(s)
- Ava M. Vargason
- Div. of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of PharmacyUniversity of North Carolina at Chapel HillChapel HillNC 27599
| | - Aaron C. Anselmo
- Div. of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of PharmacyUniversity of North Carolina at Chapel HillChapel HillNC 27599
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