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Smith JW, Carnevale LN, Das A, Chen Q. Electron videography of a lipid-protein tango. SCIENCE ADVANCES 2024; 10:eadk0217. [PMID: 38630809 PMCID: PMC11023515 DOI: 10.1126/sciadv.adk0217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 03/15/2024] [Indexed: 04/19/2024]
Abstract
Biological phenomena, from enzymatic catalysis to synaptic transmission, originate in the structural transformations of biomolecules and biomolecular assemblies in liquid water. However, directly imaging these nanoscopic dynamics without probes or labels has been a fundamental methodological challenge. Here, we developed an approach for "electron videography"-combining liquid phase electron microscopy with molecular modeling-with which we filmed the nanoscale structural fluctuations of individual, suspended, and unlabeled membrane protein nanodiscs in liquid. Systematic comparisons with biochemical data and simulation indicate the graphene encapsulation involved can afford sufficiently reduced effects of the illuminating electron beam for these observations to yield quantitative fingerprints of nanoscale lipid-protein interactions. Our results suggest that lipid-protein interactions delineate dynamically modified membrane domains across unexpectedly long ranges. Moreover, they contribute to the molecular mechanics of the nanodisc as a whole in a manner specific to the protein within. Overall, this work illustrates an experimental approach to film, quantify, and understand biomolecular dynamics at the nanometer scale.
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Affiliation(s)
- John W. Smith
- Department of Materials Science and Engineering, University of Illinois Urbana–Champaign, Urbana, IL 61801, USA
| | - Lauren N. Carnevale
- Department of Biochemistry, University of Illinois Urbana–Champaign, Urbana, IL 61801, USA
| | - Aditi Das
- School of Chemistry and Biochemistry, Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Qian Chen
- Department of Materials Science and Engineering, University of Illinois Urbana–Champaign, Urbana, IL 61801, USA
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana–Champaign, Urbana, IL 61801, USA
- Department of Chemistry, University of Illinois Urbana–Champaign, Urbana, IL 61801, USA
- Materials Research Laboratory, University of Illinois Urbana–Champaign, Urbana, IL 61801, USA
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2
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Zhao T, Jiang Y, Luo S, Ying Y, Zhang Q, Tang S, Chen L, Xia J, Xue P, Zhang JJ, Sun SG, Liao HG. On-chip gas reaction nanolab for in situ TEM observation. LAB ON A CHIP 2023; 23:3768-3777. [PMID: 37489871 DOI: 10.1039/d3lc00184a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
The catalysis reaction mechanism at nano/atomic scale attracted intense attention in the past decades. However, most in situ characterization technologies can only reflect the average information of catalysts, which leads to the inability to characterize the dynamic changes of single nanostructures or active sites under operando conditions, and many micro-nanoscale reaction mechanisms are still unknown. The combination of in situ transmission electron microscopy (TEM) holder system with MEMS chips provides a solution for it, where the design and fabrication of MEMS chips are the key factors. Here, with the aid of finite element simulation, an ultra-stable heating chip was developed, which has an ultra-low thermal drift during temperature heating. Under ambient conditions within TEM, atomic resolution imaging was achieved during the heating process or at high temperature up to 1300 °C. Combined with the developed polymer membrane seal technique and nanofluidic control system, it can realize an adjustable pressure from 0.1 bar to 4 bar gas environment around the sample. By using the developed ultra-low drift gas reaction cells, the nanoparticle's structure evolution at atomic scale was identified during reaction.
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Affiliation(s)
- Tiqing Zhao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Youhong Jiang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Shiwen Luo
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Yifan Ying
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Qian Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Shi Tang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Linzhi Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Jing Xia
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Peng Xue
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Jia-Jun Zhang
- Xiamen Chip-Nova Technology Co., Ltd., Xiamen 361005, People's Republic of China
| | - Shi-Gang Sun
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Hong-Gang Liao
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
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3
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Arar S, Haque MA, Kayed R. Protein aggregation and neurodegenerative disease: Structural outlook for the novel therapeutics. Proteins 2023:10.1002/prot.26561. [PMID: 37530227 PMCID: PMC10834863 DOI: 10.1002/prot.26561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/12/2023] [Accepted: 07/13/2023] [Indexed: 08/03/2023]
Abstract
Before the controversial approval of humanized monoclonal antibody lecanemab, which binds to the soluble amyloid-β protofibrils, all the treatments available earlier, for Alzheimer's disease (AD) were symptomatic. The researchers are still struggling to find a breakthrough in AD therapeutic medicine, which is partially attributable to lack in understanding of the structural information associated with the intrinsically disordered proteins and amyloids. One of the major challenges in this area of research is to understand the structural diversity of intrinsically disordered proteins under in vitro conditions. Therefore, in this review, we have summarized the in vitro applications of biophysical methods, which are aimed to shed some light on the heterogeneity, pathogenicity, structures and mechanisms of the intrinsically disordered protein aggregates associated with proteinopathies including AD. This review will also rationalize some of the strategies in modulating disease-relevant pathogenic protein entities by small molecules using structural biology approaches and biophysical characterization. We have also highlighted tools and techniques to simulate the in vivo conditions for native and cytotoxic tau/amyloids assemblies, urge new chemical approaches to replicate tau/amyloids assemblies similar to those in vivo conditions, in addition to designing novel potential drugs.
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Affiliation(s)
- Sharif Arar
- Mitchell Center for Neurodegenerative Diseases
- Departments of Neurology, Neuroscience and Cell Biology, University of Texas Medical Branch, Galveston, Texas, 77555, USA
- Department of Chemistry, School of Science, The University of Jordan, Amman 11942, Jordan
| | - Md Anzarul Haque
- Mitchell Center for Neurodegenerative Diseases
- Departments of Neurology, Neuroscience and Cell Biology, University of Texas Medical Branch, Galveston, Texas, 77555, USA
| | - Rakez Kayed
- Mitchell Center for Neurodegenerative Diseases
- Departments of Neurology, Neuroscience and Cell Biology, University of Texas Medical Branch, Galveston, Texas, 77555, USA
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4
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Kuzman D, Klančnik U, Grum E, Derganc J. Real-Time Assessment of the Size Changes of Individual Sub-Visible Protein Particles under Buffer Variations: A Microfluidic Study. Pharmaceuticals (Basel) 2023; 16:1002. [PMID: 37513914 PMCID: PMC10386119 DOI: 10.3390/ph16071002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/06/2023] [Accepted: 07/12/2023] [Indexed: 07/30/2023] Open
Abstract
Protein particles in biological drugs can significantly impact drug efficacy and carry the risk of adverse effects. Despite advancements, the understanding and control of particle formation in biopharmaceutical manufacturing remain incomplete. Therefore, further investigation into protein particles is warranted, especially considering that novel formats of biological drugs may be more susceptible to aggregation and particle formation than conventional monoclonal antibodies. In this study, we introduce a microfluidic approach for the real-time analysis of individual sub-visible protein particles during buffer exchange. We find that the modulation of intermolecular forces, achieved by changing the buffer pH or urea concentration, leads to the reversible swelling and shrinkage of particles by up to 50%, which is a consequence of altered intermolecular distances. Additionally, we identify a discrepancy in the biophysical behavior of protein particles compared to monomeric protein. This finding highlights the limited predictive power of commonly applied biophysical characterization methods for particle formation in early formulation development. Moreover, the observed particle swelling may be associated with manufacturing deviations, such as filter clogging. These results highlight the importance of studying individual particles to gain a comprehensive insight into particle behavior and the impact of formulation variations in the biopharmaceutical industry.
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Affiliation(s)
- Drago Kuzman
- Novartis d.o.o., Kolodvorska 27, 1234 Mengeš, Slovenia
| | - Urška Klančnik
- Institute of Biophysics, Faculty of Medicine, University of Ljubljana, Vrazov trg 2, 1000 Ljubljana, Slovenia
| | - Eva Grum
- Novartis d.o.o., Kolodvorska 27, 1234 Mengeš, Slovenia
| | - Jure Derganc
- Institute of Biophysics, Faculty of Medicine, University of Ljubljana, Vrazov trg 2, 1000 Ljubljana, Slovenia
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5
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Particles in Biopharmaceutical Formulations, Part 2: An Update on Analytical Techniques and Applications for Therapeutic Proteins, Viruses, Vaccines and Cells. J Pharm Sci 2021; 111:933-950. [PMID: 34919969 DOI: 10.1016/j.xphs.2021.12.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 12/09/2021] [Accepted: 12/09/2021] [Indexed: 11/21/2022]
Abstract
Particles in biopharmaceutical formulations remain a hot topic in drug product development. With new product classes emerging it is crucial to discriminate particulate active pharmaceutical ingredients from particulate impurities. Technical improvements, new analytical developments and emerging tools (e.g., machine learning tools) increase the amount of information generated for particles. For a proper interpretation and judgment of the generated data a thorough understanding of the measurement principle, suitable application fields and potential limitations and pitfalls is required. Our review provides a comprehensive overview of novel particle analysis techniques emerging in the last decade for particulate impurities in therapeutic protein formulations (protein-related, excipient-related and primary packaging material-related), as well as particulate biopharmaceutical formulations (virus particles, virus-like particles, lipid nanoparticles and cell-based medicinal products). In addition, we review the literature on applications, describe specific analytical approaches and illustrate advantages and drawbacks of currently available techniques for particulate biopharmaceutical formulations.
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6
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Wang Z, Mim C. Optimizing purification of the peripheral membrane protein FAM92A1 fused to a modified spidroin tag. Protein Expr Purif 2021; 189:105992. [PMID: 34648955 DOI: 10.1016/j.pep.2021.105992] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 10/05/2021] [Accepted: 10/06/2021] [Indexed: 11/30/2022]
Abstract
Cryo-electron microscopy has revolutionized structural biology. In particular structures of proteins at the membrane interface have been a major contribution of cryoEM. Yet, visualization and characterization of peripheral membrane proteins remains challenging; mostly because there is no unified purification strategy for these proteins. FAM92A1 is a novel peripheral membrane protein that binds to the mitochondrial inner membrane. There, FAM92A1 dimers bind to the membrane and play an essential role in regulating the mitochondrial ultrastructure. Curiously, FAM92A1 has also an important function in ciliogenesis. FAM92A1 is part of the membrane bending Bin1/Amphiphsyin/RVS (BAR) domain protein family. Currently, there is no structure of FAM92A1, mostly because FAM92A1 is unstable and insoluble at high concentrations, like many BAR domain proteins. Yet, pure and concentrated protein is a necessity for screening to generate samples suitable for structure determination. Here, we present an optimized purification and expression strategy for dimeric FAM92A1. To our knowledge, we are the first to use the spidroin tag NT* to successfully purify a peripheral membrane protein. Our results show that NT* not only increases solubility but stabilizes FAM92A1 as a dimer. FAM92A1 fused to NT* is active because it is able to efficiently bend membranes. Taken together, our strategy indicates that this is a possible avenue to express and purify other challenging BAR domain proteins.
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Affiliation(s)
- Zuoneng Wang
- Department of Biomedical Engineering and Health Systems, Royal Technical Institute (KTH), Hälsovägen 11C, 141 2 Huddinge, Sweden
| | - Carsten Mim
- Department of Biomedical Engineering and Health Systems, Royal Technical Institute (KTH), Hälsovägen 11C, 141 2 Huddinge, Sweden.
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7
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Cho JM, Park S, Ghosh R, Ly K, Ramous C, Thompson L, Hansen M, Mattera MSDLC, Pires KM, Ferhat M, Mookherjee S, Whitehead KJ, Carter K, Buffolo M, Boudina S, Symons JD. Late-in-life treadmill training rejuvenates autophagy, protein aggregate clearance, and function in mouse hearts. Aging Cell 2021; 20:e13467. [PMID: 34554626 PMCID: PMC8520717 DOI: 10.1111/acel.13467] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 07/08/2021] [Accepted: 08/05/2021] [Indexed: 01/18/2023] Open
Abstract
Protein quality control mechanisms decline during the process of cardiac aging. This enables the accumulation of protein aggregates and damaged organelles that contribute to age-associated cardiac dysfunction. Macroautophagy is the process by which post-mitotic cells such as cardiomyocytes clear defective proteins and organelles. We hypothesized that late-in-life exercise training improves autophagy, protein aggregate clearance, and function that is otherwise dysregulated in hearts from old vs. adult mice. As expected, 24-month-old male C57BL/6J mice (old) exhibited repressed autophagosome formation and protein aggregate accumulation in the heart, systolic and diastolic dysfunction, and reduced exercise capacity vs. 8-month-old (adult) mice (all p < 0.05). To investigate the influence of late-in-life exercise training, additional cohorts of 21-month-old mice did (old-ETR) or did not (old-SED) complete a 3-month progressive resistance treadmill running program. Body composition, exercise capacity, and soleus muscle citrate synthase activity improved in old-ETR vs. old-SED mice at 24 months (all p < 0.05). Importantly, protein expression of autophagy markers indicate trafficking of the autophagosome to the lysosome increased, protein aggregate clearance improved, and overall function was enhanced (all p < 0.05) in hearts from old-ETR vs. old-SED mice. These data provide the first evidence that a physiological intervention initiated late-in-life improves autophagic flux, protein aggregate clearance, and contractile performance in mouse hearts.
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Affiliation(s)
- Jae Min Cho
- Nutrition and Integrative Physiology University of Utah Salt Lake City Utah USA
| | - Seul‐Ki Park
- Nutrition and Integrative Physiology University of Utah Salt Lake City Utah USA
| | - Rajeshwary Ghosh
- Nutrition and Integrative Physiology University of Utah Salt Lake City Utah USA
| | - Kellsey Ly
- Nutrition and Integrative Physiology University of Utah Salt Lake City Utah USA
| | - Caroline Ramous
- Nutrition and Integrative Physiology University of Utah Salt Lake City Utah USA
| | - Lauren Thompson
- Nutrition and Integrative Physiology University of Utah Salt Lake City Utah USA
| | - Michele Hansen
- Nutrition and Integrative Physiology University of Utah Salt Lake City Utah USA
| | | | - Karla Maria Pires
- Nutrition and Integrative Physiology University of Utah Salt Lake City Utah USA
| | - Maroua Ferhat
- Nutrition and Integrative Physiology University of Utah Salt Lake City Utah USA
| | - Sohom Mookherjee
- Nutrition and Integrative Physiology University of Utah Salt Lake City Utah USA
| | - Kevin J. Whitehead
- Molecular Medicine Program University of Utah Salt Lake City Utah USA
- Division of Cardiovascular Medicine and Pediatric Cardiology University of Utah Salt Lake City Utah USA
- George E Wahlen VA Medical Center University of Utah Salt Lake City Utah USA
| | - Kandis Carter
- Molecular Medicine Program University of Utah Salt Lake City Utah USA
| | - Márcio Buffolo
- Nutrition and Integrative Physiology University of Utah Salt Lake City Utah USA
| | - Sihem Boudina
- Nutrition and Integrative Physiology University of Utah Salt Lake City Utah USA
- Molecular Medicine Program University of Utah Salt Lake City Utah USA
| | - J. David Symons
- Nutrition and Integrative Physiology University of Utah Salt Lake City Utah USA
- Molecular Medicine Program University of Utah Salt Lake City Utah USA
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8
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Rizvi A, Mulvey JT, Carpenter BP, Talosig R, Patterson JP. A Close Look at Molecular Self-Assembly with the Transmission Electron Microscope. Chem Rev 2021; 121:14232-14280. [PMID: 34329552 DOI: 10.1021/acs.chemrev.1c00189] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Molecular self-assembly is pervasive in the formation of living and synthetic materials. Knowledge gained from research into the principles of molecular self-assembly drives innovation in the biological, chemical, and materials sciences. Self-assembly processes span a wide range of temporal and spatial domains and are often unintuitive and complex. Studying such complex processes requires an arsenal of analytical and computational tools. Within this arsenal, the transmission electron microscope stands out for its unique ability to visualize and quantify self-assembly structures and processes. This review describes the contribution that the transmission electron microscope has made to the field of molecular self-assembly. An emphasis is placed on which TEM methods are applicable to different structures and processes and how TEM can be used in combination with other experimental or computational methods. Finally, we provide an outlook on the current challenges to, and opportunities for, increasing the impact that the transmission electron microscope can have on molecular self-assembly.
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Affiliation(s)
- Aoon Rizvi
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Justin T Mulvey
- Department of Materials Science and Engineering, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Brooke P Carpenter
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Rain Talosig
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Joseph P Patterson
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
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9
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Kubota R, Tanaka W, Hamachi I. Microscopic Imaging Techniques for Molecular Assemblies: Electron, Atomic Force, and Confocal Microscopies. Chem Rev 2021; 121:14281-14347. [DOI: 10.1021/acs.chemrev.0c01334] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Ryou Kubota
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Wataru Tanaka
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Itaru Hamachi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
- JST-ERATO, Hamachi Innovative Molecular Technology for Neuroscience, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8530, Japan
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10
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Sun M, Tian J, Chen Q. The studies on wet chemical etching via in situ liquid cell TEM. Ultramicroscopy 2021; 231:113271. [PMID: 33879369 DOI: 10.1016/j.ultramic.2021.113271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 03/11/2021] [Accepted: 04/02/2021] [Indexed: 12/31/2022]
Abstract
Wet chemical etching is a widely used process to fabricate fascinating nanomaterials, such as nanoparticles with precisely controlled size and shape. Understanding the etching mechanism and kinetic evolution process is crucial for controlling wet chemical etching. The development of in situ liquid cell transmission electron microscopy (LCTEM) enables the study on wet chemical etching with high temporal and spatial resolutions. However, there still lack a detailed literature review on the wet chemical etching studies by in situ LCTEM. In this review, we summarize the studies on wet etching nanoparticles, one-dimensional nanomaterials and nanoribbons by in situ LCTEM, including etching rate, anisotropic etching, morphology evolution process, and etching mechanism. The challenges and opportunities of in situ LCTEM are also discussed.
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Affiliation(s)
- Mei Sun
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China; Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Jiamin Tian
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China
| | - Qing Chen
- Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China.
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11
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A Review on Mixing-Induced Protein Particle Formation: The Puzzle of Bottom-Mounted Mixers. J Pharm Sci 2020; 109:2363-2374. [DOI: 10.1016/j.xphs.2020.03.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 03/24/2020] [Accepted: 03/25/2020] [Indexed: 12/18/2022]
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12
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Smith JW, Chen Q. Liquid-phase electron microscopy imaging of cellular and biomolecular systems. J Mater Chem B 2020; 8:8490-8506. [DOI: 10.1039/d0tb01300e] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Liquid-phase electron microscopy, a new method for real-time nanoscopic imaging in liquid, makes it possible to study cells or biomolecules with a singular combination of spatial and temporal resolution. We review the state of the art in biological research in this growing and promising field.
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Affiliation(s)
- John W. Smith
- Department of Materials Science and Engineering, University of Illinois at Urbana–Champaign
- Urbana
- USA
| | - Qian Chen
- Department of Materials Science and Engineering, University of Illinois at Urbana–Champaign
- Urbana
- USA
- Department of Chemistry
- University of Illinois at Urbana–Champaign
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13
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Le Ferrand H, Duchamp M, Gabryelczyk B, Cai H, Miserez A. Time-Resolved Observations of Liquid–Liquid Phase Separation at the Nanoscale Using in Situ Liquid Transmission Electron Microscopy. J Am Chem Soc 2019; 141:7202-7210. [DOI: 10.1021/jacs.9b03083] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Hortense Le Ferrand
- Biological and Biomimetic Material Laboratory and Center for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University (NTU), 50 Nanyang Avenue, Singapore 637553
| | - Martial Duchamp
- Laboratory for in Situ & Operando Electron Nanoscopy, School of Materials Science and Engineering, Nanyang Technological University (NTU), 50 Nanyang Avenue, Singapore 637371
| | - Bartosz Gabryelczyk
- Biological and Biomimetic Material Laboratory and Center for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University (NTU), 50 Nanyang Avenue, Singapore 637553
| | - Hao Cai
- Biological and Biomimetic Material Laboratory and Center for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University (NTU), 50 Nanyang Avenue, Singapore 637553
| | - Ali Miserez
- Biological and Biomimetic Material Laboratory and Center for Biomimetic Sensor Science, School of Materials Science and Engineering, Nanyang Technological University (NTU), 50 Nanyang Avenue, Singapore 637553
- School of Biological Sciences, Nanyang Technological University (NTU), 60 Nanyang Drive, Singapore 637551
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14
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Senga Y, Imamura H, Ogura T, Honda S. In-Solution Microscopic Imaging of Fractal Aggregates of a Stressed Therapeutic Antibody. Anal Chem 2019; 91:4640-4648. [PMID: 30888793 DOI: 10.1021/acs.analchem.8b05979] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Aggregates of therapeutic proteins that can contaminate drug products during manufacture is a growing concern for the pharmaceutical industry because the aggregates are potentially immunogenic. Electron microscopy is a typical, indispensable method for imaging nanometer- to micrometer-sized structures. Nevertheless, it is not ideal because it must be performed with ex situ monitoring under high-vacuum conditions, where the samples could be altered by staining and drying. Here, we introduce a scanning electron-assisted dielectric microscopy (SE-ADM) technique for in-solution imaging of monoclonal immunoglobulin G (IgG) aggregates without staining and drying. Remarkably, SE-ADM allowed assessment of the size and morphology of the IgG aggregates in solution by completely excluding drying-induced artifacts. SE-ADM was also beneficial to study IgG aggregation caused by temporary acid exposure followed by neutralization, pH-shift stress. A box-counting analysis of the SE-ADM images provided fractal dimensions of the larger aggregates, which complemented the fractal dimensions of the smaller aggregates measured by light scattering. The scale-free or self-similarity nature of the fractal aggregates indicated that a common mechanism for antibody aggregation existed between the smaller and larger aggregates. Consequently, SE-ADM is a useful method for characterizing protein aggregates to bridge the gaps that occur among conventional analytical methods, such as those related to in situ/ ex situ techniques or size/morphology assessments.
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Affiliation(s)
- Yukako Senga
- Biomedical Research Institute , National Institute of Advanced Industrial Science and Technology (AIST) , Higashi, Tsukuba , Ibaraki 305-8566 , Japan
| | - Hiroshi Imamura
- Biomedical Research Institute , National Institute of Advanced Industrial Science and Technology (AIST) , Higashi, Tsukuba , Ibaraki 305-8566 , Japan
| | - Toshihiko Ogura
- Biomedical Research Institute , National Institute of Advanced Industrial Science and Technology (AIST) , Higashi, Tsukuba , Ibaraki 305-8566 , Japan
| | - Shinya Honda
- Biomedical Research Institute , National Institute of Advanced Industrial Science and Technology (AIST) , Higashi, Tsukuba , Ibaraki 305-8566 , Japan
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15
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He K, Shokuhfar T, Shahbazian-Yassar R. Imaging of soft materials using in situ liquid-cell transmission electron microscopy. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:103001. [PMID: 30524096 DOI: 10.1088/1361-648x/aaf616] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This review summarizes the breakthroughs in the field of soft material characterization by in situ liquid-cell transmission electron microscopy (TEM). The focus of this review is mostly on soft biological species such as cells, bacteria, viruses, proteins and polymers. The comparison between the two main liquid-cell systems (silicon nitride membranes liquid cell and graphene liquid cell) is also discussed in terms of their spatial resolution and imaging/analytical capabilities. We have showcased how liquid-cell TEM can reveal the structural details of whole cells, enable the chemical probing of proteins, detect the structural conformation of viruses, and monitor the dynamics of polymerization. In addition, the challenges faced by decoupling electron beam effect on beam-sensitive soft materials are discussed. At the end, future perspectives of in situ liquid-cell TEM studies of soft materials are outlined.
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Affiliation(s)
- Kun He
- Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, IL 60607, United States of America
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Nagamanasa KH, Wang H, Granick S. Liquid-Cell Electron Microscopy of Adsorbed Polymers. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1703555. [PMID: 28921693 DOI: 10.1002/adma.201703555] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 08/05/2017] [Indexed: 06/07/2023]
Abstract
Individual macromolecules of polystyrene sulfonate and poly(ethylene oxide) are visualized with nanometer resolution using transmission electron microscopy (TEM) imaging of aqueous solutions with and without added salt, trapped in liquid pockets between creased graphene sheets. Successful imaging with 0.3 s per frame is enabled by the sluggish mobility of the adsorbed molecules. This study finds, validating others, that an advantage of this graphene liquid-cell approach is apparently to retard sample degradation from incident electrons, in addition to minimizing background scattering because graphene windows are atomically thin. Its new application here to polymers devoid of metal-ion labeling allows the projected sizes and conformational fluctuations of adsorbed molecules and adsorption-desorption events to be analyzed. Confirming the identification of the observed objects, this study reports statistical analysis of datasets of hundreds of images for times up to 100 s, with variation of the chemical makeup of the polymer, the molecular weight of the polymer, and the salt concentration. This observation of discrete polymer molecules in solution environment may be useful generally, as the findings are obtained using an ordinary TEM microscope, whose kind is available to many researchers routinely.
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Affiliation(s)
| | - Huan Wang
- IBS Center for Soft and Living Matter, UNIST, Ulsan, 689-798, South Korea
| | - Steve Granick
- IBS Center for Soft and Living Matter, UNIST, Ulsan, 689-798, South Korea
- Departments of Chemistry and Physics, UNIST, Ulsan, 689-798, South Korea
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17
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Jang H, Kang IS, Kim J, Kim J, Cha YJ, Yoon DK, Lee W. Nanofluidic chip for liquid TEM cell fabricated by parylene and silicon nitride direct bonding. NANOTECHNOLOGY 2017; 28:375301. [PMID: 28737164 DOI: 10.1088/1361-6528/aa8196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Despite the importance of nanofluidic transmission electron microscope (TEM) chips, a simple fabrication method has yet to be developed due to the difficulty of wafer bonding techniques using a nanoscale thick bonding layer. We present a simple and robust wafer scale bonding technique using parylene as a bonding layer. A nanoscale thick parylene layer was deposited on a silicon nitride (SiN) wafer and patterned to construct nanofluidic channels. The patterned parylene layer was directly bonded to another SiN wafer by thermal surface activation and bonding, with a bonding strength of ∼3 MPa. Fourier transform infrared spectroscopy showed that carbon-oxygen bonds were generated by thermal activation. We demonstrated TEM imaging of gold nanoparticles suspended in liquid using the fabricated nanofluidic chip.
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Affiliation(s)
- Heejun Jang
- Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea. KAIST Institute for NanoCentury, KAIST, Daejeon 34141, Republic of Korea
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Luo C, Wang C, Wu X, Zhang J, Chu J. In Situ Transmission Electron Microscopy Characterization and Manipulation of Two-Dimensional Layered Materials beyond Graphene. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1604259. [PMID: 28783241 DOI: 10.1002/smll.201604259] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Revised: 06/22/2017] [Indexed: 06/07/2023]
Abstract
Two-dimensional (2D) ultra-thin materials beyond graphene with rich physical properties and unique layered structures are promising for applications in electronics, chemistry, energy, and bioscience, etc. The interaction mechanisms among the structures, chemical compositions and physical properties of 2D layered materials are critical for fundamental nanosciences and the practical fabrication of next-generation nanodevices. Transmission electron microscopy (TEM), with its high spatial resolution and versatile external fields, is undoubtedly a powerful tool for the static characterization and dynamic manipulation of nanomaterials and nanodevices at the atomic scale. The rapid development of thin-film and precision microelectromechanical systems (MEMS) techniques allows 2D layered materials and nanodevices to be probed and engineered inside TEM under external stimuli such as thermal, electrical, mechanical, liquid/gas environmental, optical, and magnetic fields at the nanoscale. Such advanced technologies leverage the traditional static TEM characterization into an in situ and interactive manipulation of 2D layered materials without sacrificing the resolution or the high vacuum chamber environment, facilitating exploration of the intrinsic structure-property relationship of 2D layered materials. In this Review, the dynamic properties tailored and observed by the most advanced and unprecedented in situ TEM technology are introduced. The challenges in spatial, time and energy resolution are discussed also.
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Affiliation(s)
- Chen Luo
- Shanghai Key Laboratory of Multidimensional Information Processing, State Key Laboratory of Transducer Technology, Department of Electrical Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Chaolun Wang
- Shanghai Key Laboratory of Multidimensional Information Processing, State Key Laboratory of Transducer Technology, Department of Electrical Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Xing Wu
- Shanghai Key Laboratory of Multidimensional Information Processing, State Key Laboratory of Transducer Technology, Department of Electrical Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Jian Zhang
- Shanghai Key Laboratory of Multidimensional Information Processing, State Key Laboratory of Transducer Technology, Department of Electrical Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
| | - Junhao Chu
- Shanghai Key Laboratory of Multidimensional Information Processing, State Key Laboratory of Transducer Technology, Department of Electrical Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, China
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Luo B, Smith JW, Ou Z, Chen Q. Quantifying the Self-Assembly Behavior of Anisotropic Nanoparticles Using Liquid-Phase Transmission Electron Microscopy. Acc Chem Res 2017; 50:1125-1133. [PMID: 28443654 DOI: 10.1021/acs.accounts.7b00048] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
For decades, one of the overarching objectives of self-assembly science has been to define the rules necessary to build functional, artificial materials with rich and adaptive phase behavior from the bottom-up. To this end, the computational and experimental efforts of chemists, physicists, materials scientists, and biologists alike have built a body of knowledge that spans both disciplines and length scales. Indeed, today control of self-assembly is extending even to supramolecular and molecular levels, where crystal engineering and design of porous materials are becoming exciting areas of exploration. Nevertheless, at least at the nanoscale, there are many stones yet to be turned. While recent breakthroughs in nanoparticle (NP) synthesis have amassed a vast library of nanoscale building blocks, NP-NP interactions in situ remain poorly quantified, in large part due to technical and theoretical impediments. While increasingly many applications for self-assembled architectures are being demonstrated, it remains difficult to predict-and therefore engineer-the pathways by which these structures form. Here, we describe how investigations using liquid-phase transmission electron microscopy (TEM) have begun to play a role in pursuing some of these long-standing questions of fundamental and far-reaching interest. Liquid-phase TEM is unique in its ability to resolve the motions and trajectories of single NPs in solution, making it a powerful tool for studying the dynamics of NP self-assembly. Since 2012, liquid-phase TEM has been used to investigate the self-assembly behavior of a variety of simple, metallic NPs. In this Account, however, we focus on our work with anisotropic NPs, which we show to have very different self-assembly behavior, and especially on how analysis methods we and others in the field are developing can be used to convert their motions and trajectories revealed by liquid-phase TEM into quantitative understanding of underlying interactions and dynamics. In general, liquid-phase TEM studies may help bridge enduring gaps in the understanding and control of self-assembly at the nanoscale. For one, quantification of NP-NP interactions and self-assembly dynamics will inform both computational and statistical mechanical models used to describe nanoscale phenomena. Such understanding will also lay the groundwork for establishing new and generalizable thermodynamic and kinetic design rules for NP self-assembly. Synergies with NP synthesis will enable investigations of building blocks with novel, perhaps even evolving or active behavior. Moreover, in the long run, we foresee the possibility of applying the guidelines and models of fundamental nanoscale interactions which are uncovered under liquid-phase TEM to biological and biomimetic systems at similar dimensions.
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Affiliation(s)
- Binbin Luo
- Department
of Materials Science and Engineering, ‡Frederick Seitz Materials Research
Laboratory, and §Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - John W. Smith
- Department
of Materials Science and Engineering, ‡Frederick Seitz Materials Research
Laboratory, and §Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Zihao Ou
- Department
of Materials Science and Engineering, ‡Frederick Seitz Materials Research
Laboratory, and §Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
| | - Qian Chen
- Department
of Materials Science and Engineering, ‡Frederick Seitz Materials Research
Laboratory, and §Department of Chemistry, University of Illinois, Urbana, Illinois 61801, United States
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