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Mendes G, Faulk B, Kaparthi B, Irion AR, Fong BL, Bayless K, Bondos SE. Genetic Functionalization of Protein-Based Biomaterials via Protein Fusions. Biomacromolecules 2024; 25:4639-4662. [PMID: 39074364 PMCID: PMC11323028 DOI: 10.1021/acs.biomac.4c00188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 07/03/2024] [Accepted: 07/03/2024] [Indexed: 07/31/2024]
Abstract
Proteins implement many useful functions, including binding ligands with unparalleled affinity and specificity, catalyzing stereospecific chemical reactions, and directing cell behavior. Incorporating proteins into materials has the potential to imbue devices with these desirable traits. This review highlights recent advances in creating active materials by genetically fusing a self-assembling protein to a functional protein. These fusion proteins form materials while retaining the function of interest. Key advantages of this approach include elimination of a separate functionalization step during materials synthesis, uniform and dense coverage of the material by the functional protein, and stabilization of the functional protein. This review focuses on macroscale materials and discusses (i) multiple strategies for successful protein fusion design, (ii) successes and limitations of the protein fusion approach, (iii) engineering solutions to bypass any limitations, (iv) applications of protein fusion materials, including tissue engineering, drug delivery, enzyme immobilization, electronics, and biosensing, and (v) opportunities to further develop this useful technique.
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Affiliation(s)
- Gabriela
Geraldo Mendes
- Department
of Molecular and Cellular Medicine, College of Medicine, Texas A&M Health, Bryan, Texas 77807-3260, United States
- Fralin
Biomedical Research Institute, Virginia
Tech University, Roanoke, Virginia 24016, United States
| | - Britt Faulk
- Department
of Medical Physiology, College of Medicine, Texas A&M Health, Bryan, Texas 77807, United States
- Department
of Biochemistry and Biophysics, Texas A&M
University, College Station, Texas 77843, United States
| | - Bhavika Kaparthi
- Department
of Medical Physiology, College of Medicine, Texas A&M Health, Bryan, Texas 77807, United States
| | - Andrew R. Irion
- Department
of Medical Physiology, College of Medicine, Texas A&M Health, Bryan, Texas 77807, United States
| | - Brandon Look Fong
- Department
of Medical Physiology, College of Medicine, Texas A&M Health, Bryan, Texas 77807, United States
| | - Kayla Bayless
- Department
of Molecular and Cellular Medicine, College of Medicine, Texas A&M Health, Bryan, Texas 77807-3260, United States
- Department
of Medical Physiology, College of Medicine, Texas A&M Health, Bryan, Texas 77807, United States
| | - Sarah E. Bondos
- Department
of Molecular and Cellular Medicine, College of Medicine, Texas A&M Health, Bryan, Texas 77807-3260, United States
- Department
of Medical Physiology, College of Medicine, Texas A&M Health, Bryan, Texas 77807, United States
- Department
of BioSciences, Rice University, Houston, Texas 77005, United States
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2
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Lee D, Jung HG, Park D, Bang J, Cheong DY, Jang JW, Kim Y, Lee S, Lee SW, Lee G, Kim YH, Hong JH, Hwang KS, Lee JH, Yoon DS. Bioengineered amyloid peptide for rapid screening of inhibitors against main protease of SARS-CoV-2. Nat Commun 2024; 15:2108. [PMID: 38453923 PMCID: PMC10920794 DOI: 10.1038/s41467-024-46296-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Accepted: 02/22/2024] [Indexed: 03/09/2024] Open
Abstract
The coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) has evoked a worldwide pandemic. As the emergence of variants has hampered the neutralization capacity of currently available vaccines, developing effective antiviral therapeutics against SARS-CoV-2 and its variants becomes a significant challenge. The main protease (Mpro) of SARS-CoV-2 has received increased attention as an attractive pharmaceutical target because of its pivotal role in viral replication and proliferation. Here, we generated a de novo Mpro-inhibitor screening platform to evaluate the efficacies of Mpro inhibitors based on Mpro cleavage site-embedded amyloid peptide (MCAP)-coated gold nanoparticles (MCAP-AuNPs). We fabricated MCAPs comprising an amyloid-forming sequence and Mpro-cleavage sequence, mimicking in vivo viral replication process mediated by Mpro. By measuring the proteolytic activity of Mpro and the inhibitory efficacies of various drugs, we confirmed that the MCAP-AuNP-based platform was suitable for rapid screening potential of Mpro inhibitors. These results demonstrated that our MCAP-AuNP-based platform has great potential for discovering Mpro inhibitors and may accelerate the development of therapeutics against COVID-19.
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Affiliation(s)
- Dongtak Lee
- School of Biomedical Engineering, Korea University, Seoul, 02841, South Korea
- Center for Nanomedicine, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Boston, MA, 02115, USA
- Harvard Medical School, Boston, MA, 02115, USA
| | - Hyo Gi Jung
- School of Biomedical Engineering, Korea University, Seoul, 02841, South Korea
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, South Korea
| | - Dongsung Park
- School of Biomedical Engineering, Korea University, Seoul, 02841, South Korea
- Department of Clinical Pharmacology and Therapeutics, College of Medicine, Kyung Hee University, Seoul, 02447, South Korea
| | - Junho Bang
- School of Biomedical Engineering, Korea University, Seoul, 02841, South Korea
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, South Korea
| | - Da Yeon Cheong
- Department of Biotechnology and Bioinformatics, Korea University, Sejong, 30019, South Korea
- Interdisciplinary Graduate Program for Artificial Intelligence Smart Convergence Technology, Korea University, Sejong, 30019, South Korea
| | - Jae Won Jang
- School of Biomedical Engineering, Korea University, Seoul, 02841, South Korea
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, South Korea
| | - Yonghwan Kim
- School of Biomedical Engineering, Korea University, Seoul, 02841, South Korea
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, South Korea
| | - Seungmin Lee
- School of Biomedical Engineering, Korea University, Seoul, 02841, South Korea
- Department of Electrical Engineering, Kwangwoon University, Seoul, 01897, South Korea
| | - Sang Won Lee
- School of Biomedical Engineering, Korea University, Seoul, 02841, South Korea
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA, 90064, USA
| | - Gyudo Lee
- Department of Biotechnology and Bioinformatics, Korea University, Sejong, 30019, South Korea
- Interdisciplinary Graduate Program for Artificial Intelligence Smart Convergence Technology, Korea University, Sejong, 30019, South Korea
| | - Yeon Ho Kim
- School of Biomedical Engineering, Korea University, Seoul, 02841, South Korea
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, South Korea
| | - Ji Hye Hong
- School of Biomedical Engineering, Korea University, Seoul, 02841, South Korea
- Department of Electrical Engineering, Kwangwoon University, Seoul, 01897, South Korea
| | - Kyo Seon Hwang
- Department of Clinical Pharmacology and Therapeutics, College of Medicine, Kyung Hee University, Seoul, 02447, South Korea.
| | - Jeong Hoon Lee
- Department of Electrical Engineering, Kwangwoon University, Seoul, 01897, South Korea.
| | - Dae Sung Yoon
- School of Biomedical Engineering, Korea University, Seoul, 02841, South Korea.
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, South Korea.
- Astrion Inc, Seoul, 02841, South Korea.
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3
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Zhang JT, Ma J, Kankala RK, Yu Q, Wang SB, Chen AZ. Recent Advances in Fabrication of Well-Organized Protein-Based Nanostructures. ACS APPLIED BIO MATERIALS 2021; 4:4039-4048. [DOI: 10.1021/acsabm.1c00156] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jian-Ting Zhang
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen 361021, People’s Republic of China
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen 361021, People’s Republic of China
| | - Jingyao Ma
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen 361021, People’s Republic of China
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen 361021, People’s Republic of China
| | - Ranjith Kumar Kankala
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen 361021, People’s Republic of China
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen 361021, People’s Republic of China
| | - Qianqian Yu
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen 361021, People’s Republic of China
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen 361021, People’s Republic of China
| | - Shi-Bin Wang
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen 361021, People’s Republic of China
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen 361021, People’s Republic of China
| | - Ai-Zheng Chen
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen 361021, People’s Republic of China
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen 361021, People’s Republic of China
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4
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Majerle A, Schmieden DT, Jerala R, Meyer AS. Synthetic Biology for Multiscale Designed Biomimetic Assemblies: From Designed Self-Assembling Biopolymers to Bacterial Bioprinting. Biochemistry 2019; 58:2095-2104. [PMID: 30957491 DOI: 10.1021/acs.biochem.8b00922] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Nature is based on complex self-assembling systems that span from the nanoscale to the macroscale. We have already begun to design biomimetic systems with properties that have not evolved in nature, based on designed molecular interactions and regulation of biological systems. Synthetic biology is based on the principle of modularity, repurposing diverse building modules to design new types of molecular and cellular assemblies. While we are currently able to use techniques from synthetic biology to design self-assembling molecules and re-engineer functional cells, we still need to use guided assembly to construct biological assemblies at the macroscale. We review the recent strategies for designing biological systems ranging from molecular assemblies based on self-assembly of (poly)peptides to the guided assembly of patterned bacteria, spanning 7 orders of magnitude.
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Affiliation(s)
- Andreja Majerle
- Department of Synthetic Biology and Immunology , National Institute of Chemistry , Hajdrihova 19 , 1000 Ljubljana , Slovenia
| | - Dominik T Schmieden
- Department of Bionanoscience, Kavli Institute of Nanoscience , Delft University of Technology , 2629 HZ Delft , The Netherlands
| | - Roman Jerala
- Department of Synthetic Biology and Immunology , National Institute of Chemistry , Hajdrihova 19 , 1000 Ljubljana , Slovenia
| | - Anne S Meyer
- Department of Biology , University of Rochester , Rochester , New York 14627 , United States
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5
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Hsiao HC, Santos A, Howell DW, Patterson JL, Fuchs-Young RS, Bondos SE. Culture of Tumorigenic Cells on Protein Fibers Reveals Metastatic Cell Behaviors. Biomacromolecules 2016; 17:3790-3799. [DOI: 10.1021/acs.biomac.6b01311] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Hao-Ching Hsiao
- Department of Molecular and Cellular Medicine, Texas A&M University Health Science Center, College Station, Texas 77843, United States
- Department of Biosciences, Rice University, Houston Texas 77251, United States
| | - Andres Santos
- Department of Molecular and Cellular Medicine, Texas A&M University Health Science Center, College Station, Texas 77843, United States
- Department of Biosciences, Rice University, Houston Texas 77251, United States
| | - David W. Howell
- Department of Molecular and Cellular Medicine, Texas A&M University Health Science Center, College Station, Texas 77843, United States
- Department of Biosciences, Rice University, Houston Texas 77251, United States
| | - Jan L. Patterson
- Department of Molecular and Cellular Medicine, Texas A&M University Health Science Center, College Station, Texas 77843, United States
- Department of Biosciences, Rice University, Houston Texas 77251, United States
| | - Robin S.L. Fuchs-Young
- Department of Molecular and Cellular Medicine, Texas A&M University Health Science Center, College Station, Texas 77843, United States
- Department of Biosciences, Rice University, Houston Texas 77251, United States
| | - Sarah E. Bondos
- Department of Molecular and Cellular Medicine, Texas A&M University Health Science Center, College Station, Texas 77843, United States
- Department of Biosciences, Rice University, Houston Texas 77251, United States
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6
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Luo Q, Hou C, Bai Y, Wang R, Liu J. Protein Assembly: Versatile Approaches to Construct Highly Ordered Nanostructures. Chem Rev 2016; 116:13571-13632. [PMID: 27587089 DOI: 10.1021/acs.chemrev.6b00228] [Citation(s) in RCA: 357] [Impact Index Per Article: 44.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Nature endows life with a wide variety of sophisticated, synergistic, and highly functional protein assemblies. Following Nature's inspiration to assemble protein building blocks into exquisite nanostructures is emerging as a fascinating research field. Dictating protein assembly to obtain highly ordered nanostructures and sophisticated functions not only provides a powerful tool to understand the natural protein assembly process but also offers access to advanced biomaterials. Over the past couple of decades, the field of protein assembly has undergone unexpected and rapid developments, and various innovative strategies have been proposed. This Review outlines recent advances in the field of protein assembly and summarizes several strategies, including biotechnological strategies, chemical strategies, and combinations of these approaches, for manipulating proteins to self-assemble into desired nanostructures. The emergent applications of protein assemblies as versatile platforms to design a wide variety of attractive functional materials with improved performances have also been discussed. The goal of this Review is to highlight the importance of this highly interdisciplinary field and to promote its growth in a diverse variety of research fields ranging from nanoscience and material science to synthetic biology.
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Affiliation(s)
- Quan Luo
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Chunxi Hou
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Yushi Bai
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Ruibing Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau , Taipa, Macau SAR 999078, China
| | - Junqiu Liu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , 2699 Qianjin Street, Changchun 130012, P. R. China
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7
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Howell DW, Tsai SP, Churion K, Patterson J, Abbey C, Atkinson JT, Porterpan D, You YH, Meissner KE, Bayless KJ, Bondos SE. Identification of multiple dityrosine bonds in materials composed of the Drosophila protein Ultrabithorax. ADVANCED FUNCTIONAL MATERIALS 2015; 25:5988-5998. [PMID: 28725173 PMCID: PMC5513195 DOI: 10.1002/adfm.201502852] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The recombinant protein Ultrabithorax (Ubx), a Drosophila melanogaster Hox transcription factor, self-assembles into biocompatible materials in vitro that are remarkably extensible and strong. Here, we demonstrate that the strength of Ubx materials is due to intermolecular dityrosine bonds. Ubx materials auto-fluoresce blue, a characteristic of dityrosine, and bind dityrosine-specific antibodies. Monitoring the fluorescence of reduced Ubx fibers upon oxygen exposure reveals biphasic bond formation kinetics. Two dityrosine bonds in Ubx were identified by site-directed mutagenesis followed by measurements of fiber fluorescent intensity. One bond is located between the N-terminus and the homeodomain (Y4/Y296 or Y12/Y293), and another bond is formed by Y167 and Y240. Fiber fluorescence closely correlates with fiber strength, demonstrating that these bonds are intermolecular. To our knowledge, this is the first identification of specific residues that participate in dityrosine bonds in protein-based materials. The percentage of Ubx molecules harboring both bonds can be decreased or increased by mutagenesis, providing an additional mechanism to control the mechanical properties of Ubx materials. Duplication of tyrosine-containing motifs in Ubx increases dityrosine content in Ubx fibers, suggesting these motifs could be inserted in other self-assembling proteins to strengthen the corresponding materials.
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Affiliation(s)
- David W Howell
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, TX 77843, United States
| | - Shang-Pu Tsai
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, TX 77843, United States
| | - Kelly Churion
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, TX 77843, United States
| | - Jan Patterson
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, TX 77843, United States
| | - Colette Abbey
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, TX 77843, United States
| | - Joshua T Atkinson
- Systems, Synthetic, and Physical Biology Graduate Program, Rice University, Houston, TX 77005, United States
| | - Dustin Porterpan
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, TX 77843, United States
| | - Yil-Hwan You
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, United States
| | - Kenith E Meissner
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, United States
| | - Kayla J Bayless
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, TX 77843, United States
| | - Sarah E Bondos
- Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, College Station, TX 77843, United States
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8
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Bai J, Chen Y, Li P, Sun D, Tang Y. Phosphonate-functionalized three-dimensional gold nanocomposite as a sensitive interface for facile electrochemical stripping detection of trace copper(II) ions. J Electroanal Chem (Lausanne) 2015. [DOI: 10.1016/j.jelechem.2015.06.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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9
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Patterson JL, Arenas-Gamboa AM, Wang TY, Hsiao HC, Howell DW, Pellois JP, Rice-Ficht A, Bondos SE. Materials composed of theDrosophilaHox protein Ultrabithorax are biocompatible and nonimmunogenic. J Biomed Mater Res A 2014; 103:1546-53. [DOI: 10.1002/jbm.a.35295] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 06/25/2014] [Accepted: 07/23/2014] [Indexed: 12/23/2022]
Affiliation(s)
- Jan L. Patterson
- Department of Molecular and Cellular Medicine; Texas A&M Health Science Center; College Station Texas 77843
| | - Angela M. Arenas-Gamboa
- Department of Molecular and Cellular Medicine; Texas A&M Health Science Center; College Station Texas 77843
| | - Ting-Yi Wang
- Department of Biochemistry and Biophysics; Texas A&M University; College Station Texas 77843
| | - Hao-Ching Hsiao
- Department of Molecular and Cellular Medicine; Texas A&M Health Science Center; College Station Texas 77843
| | - David W. Howell
- Department of Molecular and Cellular Medicine; Texas A&M Health Science Center; College Station Texas 77843
| | - Jean-Philippe Pellois
- Department of Biochemistry and Biophysics; Texas A&M University; College Station Texas 77843
| | - Allison Rice-Ficht
- Department of Biochemistry and Biophysics; Texas A&M University; College Station Texas 77843
| | - Sarah E. Bondos
- Department of Molecular and Cellular Medicine; Texas A&M Health Science Center; College Station Texas 77843
- Department of Biochemistry and Cell Biology; Rice University; Houston Texas 77005
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10
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Ware MJ, Godin B, Singh N, Majithia R, Shamsudeen S, Serda RE, Meissner KE, Rees P, Summers HD. Analysis of the influence of cell heterogeneity on nanoparticle dose response. ACS NANO 2014; 8:6693-700. [PMID: 24923782 PMCID: PMC4216222 DOI: 10.1021/nn502356f] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 06/12/2014] [Indexed: 05/22/2023]
Abstract
Understanding the effect of variability in the interaction of individual cells with nanoparticles on the overall response of the cell population to a nanoagent is a fundamental challenge in bionanotechnology. Here, we show that the technique of time-resolved, high-throughput microscopy can be used in this endeavor. Mass measurement with single-cell resolution provides statistically robust assessments of cell heterogeneity, while the addition of a temporal element allows assessment of separate processes leading to deconvolution of the effects of particle supply and biological response. We provide a specific demonstration of the approach, in vitro, through time-resolved measurement of fibroblast cell (HFF-1) death caused by exposure to cationic nanoparticles. The results show that heterogeneity in cell area is the major source of variability with area-dependent nanoparticle capture rates determining the time of cell death and hence the form of the exposure–response characteristic. Moreover, due to the particulate nature of the nanoparticle suspension, there is a reduction in the particle concentration over the course of the experiment, eventually causing saturation in the level of measured biological outcome. A generalized mathematical description of the system is proposed, based on a simple model of particle depletion from a finite supply reservoir. This captures the essential aspects of the nanoparticle–cell interaction dynamics and accurately predicts the population exposure–response curves from individual cell heterogeneity distributions.
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Affiliation(s)
- Matthew J. Ware
- Centre for Nanohealth, College of Engineering and College of Medicine, Swansea University, Swansea SA2 8PP, U.K.
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, Texas 77030, United States
| | - Biana Godin
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, Texas 77030, United States
| | - Neenu Singh
- Centre for Nanohealth, College of Engineering and College of Medicine, Swansea University, Swansea SA2 8PP, U.K.
| | - Ravish Majithia
- Department of Surgery, Baylor College of Medicine, 6501 Fannin Street, Houston, Texas 77030, United States
| | - Sabeel Shamsudeen
- Centre for Nanohealth, College of Engineering and College of Medicine, Swansea University, Swansea SA2 8PP, U.K.
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, Texas 77030, United States
| | - Rita E. Serda
- Centre for Nanohealth, College of Engineering and College of Medicine, Swansea University, Swansea SA2 8PP, U.K.
- Department of Nanomedicine, Houston Methodist Research Institute, Houston, Texas 77030, United States
- Department of Surgery, Baylor College of Medicine, 6501 Fannin Street, Houston, Texas 77030, United States
| | - Kenith E. Meissner
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Paul Rees
- Centre for Nanohealth, College of Engineering and College of Medicine, Swansea University, Swansea SA2 8PP, U.K.
- Broad Institute of MIT and Harvard, Cambridge, Boston, Massachusetts 02148, United States
| | - Huw D. Summers
- Centre for Nanohealth, College of Engineering and College of Medicine, Swansea University, Swansea SA2 8PP, U.K.
- Address correspondence to
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11
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Nagaraja AT, Sooresh A, Meissner KE, McShane MJ. Processing and characterization of stable, pH-sensitive layer-by-layer modified colloidal quantum dots. ACS NANO 2013; 7:6194-6202. [PMID: 23782214 DOI: 10.1021/nn402061t] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Quantum Dots (QDs) stabilized with dihydrolipoic acid (DHLA) were used as a template for layer-by-layer (LbL) modification to study the effect on the QD optical properties. We studied several different polyelectrolytes to determine that large quantities of monodisperse DHLA-QDs could only be obtained with the weak polyelectrolyte pair of poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA). The key to this success was the development of a two-step method to split the LbL process into adsorption and centrifugation phases, which require different pH solutions for optimum success. Solution pH is highlighted as an important factor to achieve sufficient QD surface coverage and QD recovery during wash cycles. We optimized the process to scale up synthesis by introducing a solvent precipitation step before ultracentrifugation that, when coupled with the correct pH conditions, results in a mean QD recovery of 86-90% after three wash cycles. We found that adsorption of PAH had a negligible effect on the quantum yield and lifetime but an additional layer of PAA resulted in a substantial decrease in both quantum yield and lifetime that could not be recovered by the addition of more layers. The PAH coating provides a protective coating that extends DHLA-QDs stability, prevents photo-oxidation mediated aggregation, alleviates concerns over batch variability, and results in pH-dependent emission.
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Affiliation(s)
- Ashvin T Nagaraja
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, USA
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12
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Prasad BB, Prasad A, Tiwari MP. Quantum dots-multiwalled carbon nanotubes nanoconjugate-modified pencil graphite electrode for ultratrace analysis of hemoglobin in dilute human blood samples. Talanta 2013; 109:52-60. [DOI: 10.1016/j.talanta.2013.01.051] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Revised: 01/24/2013] [Accepted: 01/25/2013] [Indexed: 11/27/2022]
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13
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Patterson JL, Abbey CA, Bayless KJ, Bondos SE. Materials composed of the Drosophila melanogaster protein ultrabithorax are cytocompatible. J Biomed Mater Res A 2013; 102:97-104. [PMID: 23596050 DOI: 10.1002/jbm.a.34675] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Revised: 02/13/2013] [Accepted: 02/15/2013] [Indexed: 01/01/2023]
Abstract
The Drosophila melanogaster Hox protein ultrabithorax (Ubx) has the interesting ability to hierarchically self-assemble in vitro into materials that have mechanical properties comparable to natural elastin. Ubx materials can be easily functionalized by gene fusion, generating potentially useful scaffolds for cell and tissue engineering. Here, we tested the cytocompatibility of fibers composed of Ubx or an mCherry-Ubx fusion protein. Fibers were cultured with three primary human cell lines derived from vasculature at low passage: umbilical vein endothelial cells, brain vascular pericytes, or aortic smooth muscle cells. No direct or indirect toxicity was observed for any cell line, in response to fibers composed of either plain Ubx or mCherry-Ubx. Cells readily adhered to Ubx fibers, and cells attached to fibers could be transferred between tissue cultures without loss of viability for at least 96 h. When attached to fibers, the morphology of the three cell lines differed somewhat, but all cells in contact with Ubx fibers exhibited a microtubular network aligned with the long axis of Ubx fibers. Thus, Ubx fibers are cytocompatible with cultured primary human vascular cells.
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Affiliation(s)
- Jan L Patterson
- Department of Molecular and Cellular Medicine, College of Medicine, Texas A&M Health Science Center, College Station, Texas 77843-1114
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14
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Pan H, Qin M, Meng W, Cao Y, Wang W. How do proteins unfold upon adsorption on nanoparticle surfaces? LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:12779-87. [PMID: 22913793 DOI: 10.1021/la302258k] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Owing to their many outstanding features, such as small size, large surface area, and cell penetration ability, nanoparticles have been increasingly used in medicine and biomaterials as drug carriers and diagnostic or therapeutic agents. However, our understanding of the interactions of biological entities, especially proteins, with nanoparticles is far behind the explosive development of nanotechnology. In typical protein-nanoparticle interactions, two processes (i.e., surface binding and conformational changes in proteins) are intermingled with each other and have not yet been quantitatively described. Here, by using a stopped-flow fast mixing technique, we were able to shed light on the kinetics of the adsorption-induced protein unfolding on nanoparticle surfaces in detail. We observed a biphasic denaturation behavior of protein GB1 on latex nanoparticle surfaces. Such kinetics can be adequately described by a fast equilibrium adsorption followed by a slow reversible unfolding of GB1. On the basis of this model, we quantitatively measured all rate constants that are involved in this process, from which the free-energy profile is constructed. This allows us to evaluate the effects of environmental factors, such as pH and ionic strength, on both the adsorption and the conformational change in GB1 on the latex nanoparticle surface. These studies provide a general physical picture of the adsorption-induced unfolding of proteins on nanoparticle surfaces and a quantitative description of the energetics of each transition. We anticipate that it will greatly advance our current understanding of protein-nanoparticle interactions and will be helpful for the rational control of such interactions in biomedical applications.
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Affiliation(s)
- Hai Pan
- National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, 22 Hankou Road, Nanjing, Jiangsu 210093, PR China
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