1
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Štefl M, Takamiya M, Middel V, Tekpınar M, Nienhaus K, Beil T, Rastegar S, Strähle U, Nienhaus GU. Caveolae disassemble upon membrane lesioning and foster cell survival. iScience 2024; 27:108849. [PMID: 38303730 PMCID: PMC10831942 DOI: 10.1016/j.isci.2024.108849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 11/22/2023] [Accepted: 01/03/2024] [Indexed: 02/03/2024] Open
Abstract
Repair of lesions in the plasma membrane is key to sustaining cellular homeostasis. Cells maintain cytoplasmic as well as membrane-bound stores of repair proteins that can rapidly precipitate at the site of membrane lesions. However, little is known about the origins of lipids and proteins for resealing and repair of the plasma membrane. Here we study the dynamics of caveolar proteins after laser-induced lesioning of plasma membranes of mammalian C2C12 tissue culture cells and muscle cells of intact zebrafish embryos. Single-molecule diffusivity measurements indicate that caveolar clusters break up into smaller entities after wounding. Unlike Annexins and Dysferlin, caveolar proteins do not accumulate at the lesion patch. In caveolae-depleted cavin1a knockout zebrafish embryos, lesion patch formation is impaired, and injured cells show reduced survival. Our data suggest that caveolae disassembly releases surplus plasma membrane near the lesion to facilitate membrane repair after initial patch formation for emergency sealing.
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Affiliation(s)
- Martin Štefl
- Institute of Applied Physics (APH), Karlsruhe Institute of Technology (KIT), Wolfgang Gaede-Strasse 1, 76131 Karlsruhe, Germany
| | - Masanari Takamiya
- Institute of Biological and Chemical Systems (IBCS), Karlsruhe Institute of Technology (KIT), PO Box 3640, 76021 Karlsruhe, Germany
| | - Volker Middel
- Institute of Biological and Chemical Systems (IBCS), Karlsruhe Institute of Technology (KIT), PO Box 3640, 76021 Karlsruhe, Germany
| | - Miyase Tekpınar
- Institute of Applied Physics (APH), Karlsruhe Institute of Technology (KIT), Wolfgang Gaede-Strasse 1, 76131 Karlsruhe, Germany
| | - Karin Nienhaus
- Institute of Applied Physics (APH), Karlsruhe Institute of Technology (KIT), Wolfgang Gaede-Strasse 1, 76131 Karlsruhe, Germany
| | - Tanja Beil
- Institute of Biological and Chemical Systems (IBCS), Karlsruhe Institute of Technology (KIT), PO Box 3640, 76021 Karlsruhe, Germany
| | - Sepand Rastegar
- Institute of Biological and Chemical Systems (IBCS), Karlsruhe Institute of Technology (KIT), PO Box 3640, 76021 Karlsruhe, Germany
| | - Uwe Strähle
- Institute of Biological and Chemical Systems (IBCS), Karlsruhe Institute of Technology (KIT), PO Box 3640, 76021 Karlsruhe, Germany
- Centre for Organismal Studies (COS), Heidelberg University, Im Neuenheimer Feld 230, 69120 Heidelberg, Germany
| | - Gerd Ulrich Nienhaus
- Institute of Applied Physics (APH), Karlsruhe Institute of Technology (KIT), Wolfgang Gaede-Strasse 1, 76131 Karlsruhe, Germany
- Institute of Biological and Chemical Systems (IBCS), Karlsruhe Institute of Technology (KIT), PO Box 3640, 76021 Karlsruhe, Germany
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), PO Box 3640, 76021 Karlsruhe, Germany
- Department of Physics, University of Illinois at Urbana−Champaign, Urbana, IL 61801, USA
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2
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Richards CJ, Burgers TCQ, Vlijm R, Roos WH, Åberg C. Rapid Internalization of Nanoparticles by Human Cells at the Single Particle Level. ACS NANO 2023; 17:16517-16529. [PMID: 37642490 PMCID: PMC10510712 DOI: 10.1021/acsnano.3c01124] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 08/17/2023] [Indexed: 08/31/2023]
Abstract
Nanoparticle uptake by cells has been studied for applications both in nanomedicine and in nanosafety. While the majority of studies have focused on the biological mechanisms underlying particle internalization, less attention has been given to questions of a more quantitative nature, such as how many nanoparticles enter cells and how rapidly they do so. To address this, we exposed human embryonic kidney cells to 40-200 nm carboxylated polystyrene nanoparticles and the particles were observed by live-cell confocal and super-resolution stimulated emission depletion fluorescence microscopy. How long a particle remained at the cell membrane after adsorbing onto it was monitored, distinguishing whether the particle ultimately desorbed again or was internalized by the cell. We found that the majority of particles desorb, but interestingly, most of the particles that are internalized do so within seconds, independently of particle size. As this is faster than typical endocytic mechanisms, we interpret this observation as the particles entering via an endocytic event that is already taking place (as opposed to directly triggering their own uptake) or possibly via an as yet uncharacterized endocytic route. Aside from the rapidly internalizing particles, a minority of particles remain at the membrane for tens of seconds to minutes before desorbing or being internalized. We also followed particles after cell internalization, observing particles that appeared to exit the cell, sometimes as rapidly as within tens of seconds. Overall, our results provide quantitative information about nanoparticle cell internalization times and early trafficking.
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Affiliation(s)
- Ceri J. Richards
- Pharmaceutical
Analysis, Groningen Research Institute of Pharmacy, University of Groningen, 9713 AV Groningen, The Netherlands
- Molecular
Biophysics, Zernike Institute for Advanced Materials, University of Groningen, 9747 AG Groningen, The Netherlands
| | - Thomas C. Q. Burgers
- Molecular
Biophysics, Zernike Institute for Advanced Materials, University of Groningen, 9747 AG Groningen, The Netherlands
| | - Rifka Vlijm
- Molecular
Biophysics, Zernike Institute for Advanced Materials, University of Groningen, 9747 AG Groningen, The Netherlands
| | - Wouter H. Roos
- Molecular
Biophysics, Zernike Institute for Advanced Materials, University of Groningen, 9747 AG Groningen, The Netherlands
| | - Christoffer Åberg
- Pharmaceutical
Analysis, Groningen Research Institute of Pharmacy, University of Groningen, 9713 AV Groningen, The Netherlands
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3
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Sun N, Jia Y, Bai S, Li Q, Dai L, Li J. The power of super-resolution microscopy in modern biomedical science. Adv Colloid Interface Sci 2023; 314:102880. [PMID: 36965225 DOI: 10.1016/j.cis.2023.102880] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 03/08/2023] [Accepted: 03/08/2023] [Indexed: 03/14/2023]
Abstract
Super-resolution microscopy (SRM) technology that breaks the diffraction limit has revolutionized the field of cell biology since its appearance, which enables researchers to visualize cellular structures with nanometric resolution, multiple colors and single-molecule sensitivity. With the flourishing development of hardware and the availability of novel fluorescent probes, the impact of SRM has already gone beyond cell biology and extended to nanomedicine, material science and nanotechnology, and remarkably boosted important breakthroughs in these fields. In this review, we will mainly highlight the power of SRM in modern biomedical science, discussing how these SRM techniques revolutionize the way we understand cell structures, biomaterials assembly and how assembled biomaterials interact with cellular organelles, and finally their promotion to the clinical pre-diagnosis. Moreover, we also provide an outlook on the current technical challenges and future improvement direction of SRM. We hope this review can provide useful information, inspire new ideas and propel the development both from the perspective of SRM techniques and from the perspective of SRM's applications.
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Affiliation(s)
- Nan Sun
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049
| | - Yi Jia
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Shiwei Bai
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049
| | - Qi Li
- State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences, Beijing 100190, China
| | - Luru Dai
- Wenzhou Institute and Wenzhou Key Laboratory of Biophysics, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, China
| | - Junbai Li
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049.
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4
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Abstract
Super-resolution imaging techniques that overcome the diffraction limit of light have gained wide popularity for visualizing cellular structures with nanometric resolution. Following the pace of hardware developments, the availability of new fluorescent probes with superior properties is becoming ever more important. In this context, fluorescent nanoparticles (NPs) have attracted increasing attention as bright and photostable probes that address many shortcomings of traditional fluorescent probes. The use of NPs for super-resolution imaging is a recent development and this provides the focus for the current review. We give an overview of different super-resolution methods and discuss their demands on the properties of fluorescent NPs. We then review in detail the features, strengths, and weaknesses of each NP class to support these applications and provide examples from their utilization in various biological systems. Moreover, we provide an outlook on the future of the field and opportunities in material science for the development of probes for multiplexed subcellular imaging with nanometric resolution.
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Affiliation(s)
- Wei Li
- Key
Laboratory for Biobased Materials and Energy of Ministry of Education,
College of Materials and Energy, South China
Agricultural University, Guangzhou 510642, People’s Republic
of China
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, United Kingdom
| | | | - Bingfu Lei
- Key
Laboratory for Biobased Materials and Energy of Ministry of Education,
College of Materials and Energy, South China
Agricultural University, Guangzhou 510642, People’s Republic
of China
| | - Yingliang Liu
- Key
Laboratory for Biobased Materials and Energy of Ministry of Education,
College of Materials and Energy, South China
Agricultural University, Guangzhou 510642, People’s Republic
of China
| | - Clemens F. Kaminski
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, United Kingdom
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5
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Nienhaus K, Nienhaus GU. Genetically encodable fluorescent protein markers in advanced optical imaging. Methods Appl Fluoresc 2022; 10. [PMID: 35767981 DOI: 10.1088/2050-6120/ac7d3f] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 06/29/2022] [Indexed: 11/12/2022]
Abstract
Optical fluorescence microscopy plays a pivotal role in the exploration of biological structure and dynamics, especially on live specimens. Progress in the field relies, on the one hand, on technical advances in imaging and data processing and, on the other hand, on progress in fluorescent marker technologies. Among these, genetically encodable fluorescent proteins (FPs) are invaluable tools, as they allow facile labeling of live cells, tissues or organisms, as these produce the FP markers all by themselves after introduction of a suitable gene. Here we cover FP markers from the GFP family of proteins as well as tetrapyrrole-binding proteins, which further complement the FP toolbox in important ways. A broad range of FP variants have been endowed, by using protein engineering, with photophysical properties that are essential for specific fluorescence microscopy techniques, notably those offering nanoscale image resolution. We briefly introduce various advanced imaging methods and show how they utilize the distinct properties of the FP markers in exciting imaging applications, with the aim to guide researchers toward the design of powerful imaging experiments that are optimally suited to address their biological questions.
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Affiliation(s)
- Karin Nienhaus
- Institute of Applied Physics, Karlsruhe Institute of Technology, Wolfgang Gaede Str. 1, Karlsruhe, 76131, GERMANY
| | - Gerd Ulrich Nienhaus
- Karlsruhe Institute of Technology, Wolfgang Gaede Str. 1, Karlsruhe, 76131, GERMANY
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6
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Kuznik NC, Solozobova V, Lee II, Jung N, Yang L, Nienhaus K, Ntim EA, Rottenberg JT, Muhle-Goll C, Kumar AR, Peravali R, Gräßle S, Gourain V, Deville C, Cato L, Neeb A, Dilger M, Cramer von Clausbruch CA, Weiss C, Kieffer B, Nienhaus GU, Brown M, Bräse S, Cato ACB. A chemical probe for BAG1 targets androgen receptor-positive prostate cancer through oxidative stress signaling pathway. iScience 2022; 25:104175. [PMID: 35479411 PMCID: PMC9036123 DOI: 10.1016/j.isci.2022.104175] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 03/01/2022] [Accepted: 03/25/2022] [Indexed: 11/16/2022] Open
Abstract
BAG1 is a family of polypeptides with a conserved C-terminal BAG domain that functions as a nucleotide exchange factor for the molecular chaperone HSP70. BAG1 proteins also control several signaling processes including proteostasis, apoptosis, and transcription. The largest isoform, BAG1L, controls the activity of the androgen receptor (AR) and is upregulated in prostate cancer. Here, we show that BAG1L regulates AR dynamics in the nucleus and its ablation attenuates AR target gene expression especially those involved in oxidative stress and metabolism. We show that a small molecule, A4B17, that targets the BAG domain downregulates AR target genes similar to a complete BAG1L knockout and upregulates the expression of oxidative stress-induced genes involved in cell death. Furthermore, A4B17 outperformed the clinically approved antagonist enzalutamide in inhibiting cell proliferation and prostate tumor development in a mouse xenograft model. BAG1 inhibitors therefore offer unique opportunities for antagonizing AR action and prostate cancer growth. BAG1L interacts with a sequence overlapping a polyalanine tract in the AR NTD Knockdown of BAG1L increase AR dynamics in the nucleus BAG1L uses ROS pathway to regulate AR+ prostate cancer cell proliferation A small molecule BAG1 inhibitor inhibits prostate tumor growth in mouse xenografts
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Affiliation(s)
- Nane C Kuznik
- Institute of Biological and Chemical Systems, Biological Information Processing, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
| | - Valeria Solozobova
- Institute of Biological and Chemical Systems, Biological Information Processing, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
| | - Irene I Lee
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA
- Center for Functional Cancer Epigenetics, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Nicole Jung
- Institute of Biological and Chemical Systems, Functional Molecular Systems, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
| | - Linxiao Yang
- Institute of Applied Physics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
| | - Karin Nienhaus
- Institute of Applied Physics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
| | - Emmanuel A Ntim
- Institute of Biological and Chemical Systems, Biological Information Processing, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
| | - Jaice T Rottenberg
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA
- Center for Functional Cancer Epigenetics, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Claudia Muhle-Goll
- Institute of Biological Interfaces 4, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
| | - Amrish Rajendra Kumar
- Institute of Biological and Chemical Systems, Biological Information Processing, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
| | - Ravindra Peravali
- Institute of Biological and Chemical Systems, Biological Information Processing, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
| | - Simone Gräßle
- Institute of Biological and Chemical Systems, Functional Molecular Systems, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
| | - Victor Gourain
- LabEx IGO "Immunotherapy, Graft, Oncology", Centre de Recherche en Transplantation et Immunologie - UMR1064, 44093 Nantes, France
| | - Célia Deville
- Department of Integrative Structural Biology, Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM, U964, CNRS, UMR-7104, Université de Strasbourg, 67404 Illkirch-Graffenstaden, France
| | - Laura Cato
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA
- Center for Functional Cancer Epigenetics, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Antje Neeb
- Institute of Biological and Chemical Systems, Biological Information Processing, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
| | - Marco Dilger
- Institute of Biological and Chemical Systems, Biological Information Processing, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
| | - Christina A Cramer von Clausbruch
- Institute of Biological and Chemical Systems, Biological Information Processing, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
| | - Carsten Weiss
- Institute of Biological and Chemical Systems, Biological Information Processing, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
| | - Bruno Kieffer
- Department of Integrative Structural Biology, Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM, U964, CNRS, UMR-7104, Université de Strasbourg, 67404 Illkirch-Graffenstaden, France
| | - G Ulrich Nienhaus
- Institute of Biological and Chemical Systems, Biological Information Processing, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
- Institute of Applied Physics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Myles Brown
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA
- Center for Functional Cancer Epigenetics, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Stefan Bräse
- Institute of Biological and Chemical Systems, Functional Molecular Systems, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
| | - Andrew C B Cato
- Institute of Biological and Chemical Systems, Biological Information Processing, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
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7
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Nienhaus K, Xue Y, Shang L, Nienhaus GU. Protein adsorption onto nanomaterials engineered for theranostic applications. NANOTECHNOLOGY 2022; 33:262001. [PMID: 35294940 DOI: 10.1088/1361-6528/ac5e6c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 03/15/2022] [Indexed: 06/14/2023]
Abstract
The key role of biomolecule adsorption onto engineered nanomaterials for therapeutic and diagnostic purposes has been well recognized by the nanobiotechnology community, and our mechanistic understanding of nano-bio interactions has greatly advanced over the past decades. Attention has recently shifted to gaining active control of nano-bio interactions, so as to enhance the efficacy of nanomaterials in biomedical applications. In this review, we summarize progress in this field and outline directions for future development. First, we briefly review fundamental knowledge about the intricate interactions between proteins and nanomaterials, as unraveled by a large number of mechanistic studies. Then, we give a systematic overview of the ways that protein-nanomaterial interactions have been exploited in biomedical applications, including the control of protein adsorption for enhancing the targeting efficiency of nanomedicines, the design of specific protein adsorption layers on the surfaces of nanomaterials for use as drug carriers, and the development of novel nanoparticle array-based sensors based on nano-bio interactions. We will focus on particularly relevant and recent examples within these areas. Finally, we conclude this topical review with an outlook on future developments in this fascinating research field.
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Affiliation(s)
- Karin Nienhaus
- Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), D-76131 Karlsruhe, Germany
| | - Yumeng Xue
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
| | - Li Shang
- State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, People's Republic of China
| | - Gerd Ulrich Nienhaus
- Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), D-76131 Karlsruhe, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), D-76344 Eggenstein-Leopoldshafen, Germany
- Institute of Biological and Chemical Systems, Karlsruhe Institute of Technology (KIT), D-76344 Eggenstein-Leopoldshafen, Germany
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States of America
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8
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Chakkarapani SK, Shin TH, Lee S, Park KS, Lee G, Kang SH. Quantifying intracellular trafficking of silica-coated magnetic nanoparticles in live single cells by site-specific direct stochastic optical reconstruction microscopy. J Nanobiotechnology 2021; 19:398. [PMID: 34844629 PMCID: PMC8628397 DOI: 10.1186/s12951-021-01147-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 11/16/2021] [Indexed: 11/17/2022] Open
Abstract
Background Nanoparticles have been used for biomedical applications, including drug delivery, diagnosis, and imaging based on their unique properties derived from small size and large surface-to-volume ratio. However, concerns regarding unexpected toxicity due to the localization of nanoparticles in the cells are growing. Herein, we quantified the number of cell-internalized nanoparticles and monitored their cellular localization, which are critical factors for biomedical applications of nanoparticles. Methods This study investigates the intracellular trafficking of silica-coated magnetic nanoparticles containing rhodamine B isothiocyanate dye [MNPs@SiO2(RITC)] in various live single cells, such as HEK293, NIH3T3, and RAW 264.7 cells, using site-specific direct stochastic optical reconstruction microscopy (dSTORM). The time-dependent subdiffraction-limit spatial resolution of the dSTORM method allowed intracellular site-specific quantification and tracking of MNPs@SiO2(RITC). Results The MNPs@SiO2(RITC) were observed to be highly internalized in RAW 264.7 cells, compared to the HEK293 and NIH3T3 cells undergoing single-particle analysis. In addition, MNPs@SiO2(RITC) were internalized within the nuclei of RAW 264.7 and HEK293 cells but were not detected in the nuclei of NIH3T3 cells. Moreover, because of the treatment of the MNPs@SiO2(RITC), more micronuclei were detected in RAW 264.7 cells than in other cells. Conclusion The sensitive and quantitative evaluations of MNPs@SiO2(RITC) at specific sites in three different cells using a combination of dSTORM, transcriptomics, and molecular biology were performed. These findings highlight the quantitative differences in the uptake efficiency of MNPs@SiO2(RITC) and ultra-sensitivity, varying according to the cell types as ascertained by subdiffraction-limit super-resolution microscopy. Graphical Abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s12951-021-01147-1.
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Affiliation(s)
- Suresh Kumar Chakkarapani
- Department of Chemistry, Graduate School, Kyung Hee University, Yongin-si, Gyeonggi-do, 17104, Republic of Korea
| | - Tae Hwan Shin
- Department of Physiology, Ajou University School of Medicine, 164, World cup-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 16499, Republic of Korea
| | - Seungah Lee
- Department of Applied Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-si, Gyeonggi-do, 17104, Republic of Korea
| | - Kyung-Soo Park
- Nanophotonics Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Gwang Lee
- Department of Physiology, Ajou University School of Medicine, 164, World cup-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 16499, Republic of Korea. .,Department of Molecular Science and Technology, Ajou University, Suwon-si, Gyeonggi-do, 16499, Republic of Korea.
| | - Seong Ho Kang
- Department of Chemistry, Graduate School, Kyung Hee University, Yongin-si, Gyeonggi-do, 17104, Republic of Korea. .,Department of Applied Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-si, Gyeonggi-do, 17104, Republic of Korea.
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9
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Chen X, Wang Y, Zhang X, Liu C. Advances in super-resolution fluorescence microscopy for the study of nano-cell interactions. Biomater Sci 2021; 9:5484-5496. [PMID: 34286716 DOI: 10.1039/d1bm00676b] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Understanding the interactions between nanomaterials and biological systems plays an essential role in enhancing the efficacy of nanomedicines and deepening the understanding of the biological domain. Fluorescence microscopy is a powerful optical imaging technique that allows direct visualization of the behavior of fluorescent-labeled nanomaterials in the intracellular microenvironment. However, conventional fluorescence microscopy, such as confocal microscopy, has limited optical resolution due to the diffraction of light and therefore cannot provide the precise details of nanomaterials with diameters of less than ∼250 nm. Fortunately, the development of super-resolution fluorescence microscopy has overcome the resolution limitation, enabling more comprehensive studies of nano-cell interactions. Herein, we have summarized the recent advances in nano-cell interactions investigated by a variety of super-resolution microscopic techniques, which may benefit researchers in this multi-disciplinary area by providing a guideline to select appropriate platforms for studying materiobiology.
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Affiliation(s)
- Xi Chen
- Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Engineering Research Center for Biomaterials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China.
| | - Yu Wang
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
| | - Xuewei Zhang
- Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Engineering Research Center for Biomaterials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China.
| | - Changsheng Liu
- Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Engineering Research Center for Biomaterials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China.
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10
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Nienhaus K, Nienhaus GU. Fluorescent proteins of the EosFP clade: intriguing marker tools with multiple photoactivation modes for advanced microscopy. RSC Chem Biol 2021; 2:796-814. [PMID: 34458811 PMCID: PMC8341165 DOI: 10.1039/d1cb00014d] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 03/27/2021] [Indexed: 02/04/2023] Open
Abstract
Optical fluorescence microscopy has taken center stage in the exploration of biological structure and dynamics, especially on live specimens, and super-resolution imaging methods continue to deliver exciting new insights into the molecular foundations of life. Progress in the field, however, crucially hinges on advances in fluorescent marker technology. Among these, fluorescent proteins (FPs) of the GFP family are advantageous because they are genetically encodable, so that live cells, tissues or organisms can produce these markers all by themselves. A subclass of them, photoactivatable FPs, allow for control of their fluorescence emission by light irradiation, enabling pulse-chase imaging and super-resolution microscopy. In this review, we discuss FP variants of the EosFP clade that have been optimized by amino acid sequence modification to serve as markers for various imaging techniques. In general, two different modes of photoactivation are found, reversible photoswitching between a fluorescent and a nonfluorescent state and irreversible green-to red photoconversion. First, we describe their basic structural and optical properties. We then summarize recent research aimed at elucidating the photochemical processes underlying photoactivation. Finally, we briefly introduce various advanced imaging methods facilitated by specific EosFP variants, and show some exciting sample applications.
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Affiliation(s)
- Karin Nienhaus
- Institute of Applied Physics, Karlsruhe Institute of Technology 76049 Karlsruhe Germany
| | - Gerd Ulrich Nienhaus
- Institute of Applied Physics, Karlsruhe Institute of Technology 76049 Karlsruhe Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology 76021 Karlsruhe Germany
- Institute of Biological and Chemical Systems, Karlsruhe Institute of Technology 76021 Karlsruhe Germany
- Department of Physics, University of Illinois at Urbana-Champaign Urbana IL 61801 USA
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Sousa de Almeida M, Susnik E, Drasler B, Taladriz-Blanco P, Petri-Fink A, Rothen-Rutishauser B. Understanding nanoparticle endocytosis to improve targeting strategies in nanomedicine. Chem Soc Rev 2021; 50:5397-5434. [PMID: 33666625 PMCID: PMC8111542 DOI: 10.1039/d0cs01127d] [Citation(s) in RCA: 351] [Impact Index Per Article: 117.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Indexed: 12/19/2022]
Abstract
Nanoparticles (NPs) have attracted considerable attention in various fields, such as cosmetics, the food industry, material design, and nanomedicine. In particular, the fast-moving field of nanomedicine takes advantage of features of NPs for the detection and treatment of different types of cancer, fibrosis, inflammation, arthritis as well as neurodegenerative and gastrointestinal diseases. To this end, a detailed understanding of the NP uptake mechanisms by cells and intracellular localization is essential for safe and efficient therapeutic applications. In the first part of this review, we describe the several endocytic pathways involved in the internalization of NPs and we discuss the impact of the physicochemical properties of NPs on this process. In addition, the potential challenges of using various inhibitors, endocytic markers and genetic approaches to study endocytosis are addressed along with the principal (semi) quantification methods of NP uptake. The second part focuses on synthetic and bio-inspired substances, which can stimulate or decrease the cellular uptake of NPs. This approach could be interesting in nanomedicine where a high accumulation of drugs in the target cells is desirable and clearance by immune cells is to be avoided. This review contributes to an improved understanding of NP endocytic pathways and reveals potential substances, which can be used in nanomedicine to improve NP delivery.
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Affiliation(s)
- Mauro Sousa de Almeida
- Adolphe Merkle Institute, University of FribourgChemin des Verdiers 41700 FribourgSwitzerland
| | - Eva Susnik
- Adolphe Merkle Institute, University of FribourgChemin des Verdiers 41700 FribourgSwitzerland
| | - Barbara Drasler
- Adolphe Merkle Institute, University of FribourgChemin des Verdiers 41700 FribourgSwitzerland
| | | | - Alke Petri-Fink
- Adolphe Merkle Institute, University of FribourgChemin des Verdiers 41700 FribourgSwitzerland
- Department of Chemistry, University of FribourgChemin du Musée 91700 FribourgSwitzerland
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12
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Brenner B, Song KH, Sun C, Zhang HF. Improving spatial precision and field-of-view in wavelength-tagged single-particle tracking using spectroscopic single-molecule localization microscopy. APPLIED OPTICS 2021; 60:3647-3658. [PMID: 33983297 PMCID: PMC8648066 DOI: 10.1364/ao.415275] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 03/30/2021] [Indexed: 05/09/2023]
Abstract
Spectroscopic single-molecule localization microscopy (sSMLM) generates super-resolution images of single molecules while simultaneously capturing the spectra of their fluorescence emissions. However, sSMLM splits photons from single-molecule emissions into a spatial channel and a spectral channel, reducing both channels' precisions. It is also challenging in transmission grating-based sSMLM to achieve a large field-of-view (FOV) and avoid overlap between the spatial and spectral channels. The challenge in FOV has further significance in single-molecule tracking applications. In this work, we analyzed the correlation between the spatial and spectral channels in sSMLM to improve its spatial precision, and we developed a split-mirror assembly to enlarge its FOV. We demonstrate the benefits of these improvements by tracking quantum dots. We also show that we can reduce particle-identification ambiguity by tagging each particle with its unique spectral characteristics.
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Affiliation(s)
- Benjamin Brenner
- Department of Biomedical Engineering, Northwestern University, 2145 Sheridan Rd., Evanston, Illinois 60208, USA
| | - Ki-Hee Song
- Department of Biomedical Engineering, Northwestern University, 2145 Sheridan Rd., Evanston, Illinois 60208, USA
| | - Cheng Sun
- Department of Mechanical Engineering, Northwestern University, 2145 Sheridan Rd., Evanston, Illinois 60208, USA
| | - Hao F. Zhang
- Department of Biomedical Engineering, Northwestern University, 2145 Sheridan Rd., Evanston, Illinois 60208, USA
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13
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Åberg C. Kinetics of nanoparticle uptake into and distribution in human cells. NANOSCALE ADVANCES 2021; 3:2196-2212. [PMID: 36133761 PMCID: PMC9416924 DOI: 10.1039/d0na00716a] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 03/12/2021] [Indexed: 05/17/2023]
Abstract
Whether one wishes to optimise drug delivery using nano-sized carriers or avoid hazard posed by engineered nanomaterials, the kinetics of nanoparticle uptake into human cells and their subsequent intracellular distribution is key. Unique properties of the nanoscale implies that such nanoparticles are taken up and trafficked in a different fashion compared to molecular species. In this review, we discuss in detail how to describe the kinetics of nanoparticle uptake and intracellular distribution, using previous studies for illustration. We also cover the extracellular kinetics, particle degradation, endosomal escape and cell division, ending with an outlook on the future of kinetic studies.
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Affiliation(s)
- Christoffer Åberg
- Groningen Research Institute of Pharmacy, University of Groningen Antonius Deusinglaan 1 9713AV Groningen The Netherlands
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14
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Wang Z, Wang X, Zhang Y, Xu W, Han X. Principles and Applications of Single Particle Tracking in Cell Research. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2005133. [PMID: 33533163 DOI: 10.1002/smll.202005133] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 11/24/2020] [Indexed: 06/12/2023]
Abstract
It is a tough challenge for many decades to decipher the complex relationships between cell behaviors and cellular physical properties. Single particle tracking (SPT) with high spatial and temporal resolution has been applied extensively in cell research to understand physicochemical properties of cells and their bio-functions by tracking endogenous or exogenous probes. This review describes the fundamental principles of SPT as well as its applications in intracellular mechanics, membrane dynamics, organelles distribution, and processes of internalization and transport. Finally, challenges and future directions of SPT are also discussed.
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Affiliation(s)
- Zhao Wang
- State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Xuejing Wang
- College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou, 310058, China
| | - Ying Zhang
- School of Materials and Chemical Engineering, Heilongjiang Institute of Technology, Harbin, 150027, China
| | - Weili Xu
- State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Xiaojun Han
- State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
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15
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Sunbul M, Lackner J, Martin A, Englert D, Hacene B, Grün F, Nienhaus K, Nienhaus GU, Jäschke A. Super-resolution RNA imaging using a rhodamine-binding aptamer with fast exchange kinetics. Nat Biotechnol 2021; 39:686-690. [PMID: 33574610 DOI: 10.1038/s41587-020-00794-3] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 12/10/2020] [Indexed: 11/09/2022]
Abstract
Overcoming limitations of previous fluorescent light-up RNA aptamers for super-resolution imaging, we present RhoBAST, an aptamer that binds a fluorogenic rhodamine dye with fast association and dissociation kinetics. Its intermittent fluorescence emission enables single-molecule localization microscopy with a resolution not limited by photobleaching. We use RhoBAST to image subcellular structures of RNA in live and fixed cells with about 10-nm localization precision and a high signal-to-noise ratio.
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Affiliation(s)
- Murat Sunbul
- Institute of Pharmacy and Molecular Biotechnology (IPMB), Heidelberg University, Heidelberg, Germany.
| | - Jens Lackner
- Institute of Applied Physics (APH), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Annabell Martin
- Institute of Pharmacy and Molecular Biotechnology (IPMB), Heidelberg University, Heidelberg, Germany
| | - Daniel Englert
- Institute of Pharmacy and Molecular Biotechnology (IPMB), Heidelberg University, Heidelberg, Germany
| | - Benjamin Hacene
- Institute of Applied Physics (APH), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Franziska Grün
- Institute of Pharmacy and Molecular Biotechnology (IPMB), Heidelberg University, Heidelberg, Germany
| | - Karin Nienhaus
- Institute of Applied Physics (APH), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - G Ulrich Nienhaus
- Institute of Applied Physics (APH), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany. .,Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany. .,Institute of Biological and Chemical Systems (IBCS), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany. .,Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
| | - Andres Jäschke
- Institute of Pharmacy and Molecular Biotechnology (IPMB), Heidelberg University, Heidelberg, Germany.
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16
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Chen W, D'Argenio DZ, Sipos A, Kim KJ, Crandall ED. Biokinetic modeling of nanoparticle interactions with lung alveolar epithelial cells: uptake, intracellular processing, and egress. Am J Physiol Regul Integr Comp Physiol 2021; 320:R36-R43. [PMID: 33085912 PMCID: PMC7847057 DOI: 10.1152/ajpregu.00184.2020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/25/2020] [Accepted: 10/16/2020] [Indexed: 11/22/2022]
Abstract
Studies on health effects of engineered nanomaterials (ENMs) in the lung have provided information on ENM toxicity and translocation across airway and alveolar epithelial barriers. Various inhaled ENMs (e.g., gold and iridium nanoparticles) have been reported to partially cross the air-blood barrier in the lung, enter the vasculature, and distribute in several end organs, including the heart, liver, spleen, and kidney. Using an in vitro primary rat alveolar epithelial cell (AEC) monolayer model, we reported transport rates of relatively nontoxic polystyrene nanoparticles (PNPs), which appear to be taken up via nonendocytic processes into AECs. PNPs internalized into cytoplasm then trigger autophagy, followed by delivery of PNPs from autophagosomes into lysosomes, from where PNPs are exocytosed. We used the data from these experiments to perform biokinetic modeling that incorporates the processes associated with internalization and intracellular distribution of PNPs, autophagy, lysosomal exocytosis of PNPs, and several putative mechanisms of action that extend our previous understanding of AEC processing of PNPs. Results suggest that entry of PNPs into AECs, subsequent activation of autophagy by cytosolic PNPs, accumulation of PNPs in lysosomes, and lysosomal exocytosis are interwoven by proposed regulatory mechanisms.
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Affiliation(s)
- Wenbo Chen
- Department of Biomedical Engineering, Viterbi School of Engineering, University of Southern California, Los Angeles, California
| | - David Z D'Argenio
- Department of Biomedical Engineering, Viterbi School of Engineering, University of Southern California, Los Angeles, California
| | - Arnold Sipos
- Will Rogers Institute Pulmonary Research Center and Hastings Center for Pulmonary Research, Keck School of Medicine, University of Southern California, Los Angeles, California
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California
| | - Kwang-Jin Kim
- Department of Biomedical Engineering, Viterbi School of Engineering, University of Southern California, Los Angeles, California
- Will Rogers Institute Pulmonary Research Center and Hastings Center for Pulmonary Research, Keck School of Medicine, University of Southern California, Los Angeles, California
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California
- Department of Physiology and Neuroscience, Keck School of Medicine, University of Southern California, Los Angeles, California
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, California
| | - Edward D Crandall
- Will Rogers Institute Pulmonary Research Center and Hastings Center for Pulmonary Research, Keck School of Medicine, University of Southern California, Los Angeles, California
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California
- Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, California
- Mork Family Department of Chemical Engineering and Materials Science, Viterbi School of Engineering, University of Southern California, Los Angeles, California
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17
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Sadoon AA, Khadka P, Freeland J, Gundampati RK, Manso RH, Ruiz M, Krishnamurthi VR, Thallapuranam SK, Chen J, Wang Y. Silver Ions Caused Faster Diffusive Dynamics of Histone-Like Nucleoid-Structuring Proteins in Live Bacteria. Appl Environ Microbiol 2020; 86:e02479-19. [PMID: 31953329 PMCID: PMC7054089 DOI: 10.1128/aem.02479-19] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 01/10/2020] [Indexed: 12/13/2022] Open
Abstract
The antimicrobial activity and mechanism of silver ions (Ag+) have gained broad attention in recent years. However, dynamic studies are rare in this field. Here, we report our measurement of the effects of Ag+ ions on the dynamics of histone-like nucleoid-structuring (H-NS) proteins in live bacteria using single-particle-tracking photoactivated localization microscopy (sptPALM). It was found that treating the bacteria with Ag+ ions led to faster diffusive dynamics of H-NS proteins. Several techniques were used to understand the mechanism of the observed faster dynamics. Electrophoretic mobility shift assay on purified H-NS proteins indicated that Ag+ ions weaken the binding between H-NS proteins and DNA. Isothermal titration calorimetry confirmed that DNA and Ag+ ions interact directly. Our recently developed sensing method based on bent DNA suggested that Ag+ ions caused dehybridization of double-stranded DNA (i.e., dissociation into single strands). These evidences led us to a plausible mechanism for the observed faster dynamics of H-NS proteins in live bacteria when subjected to Ag+ ions: Ag+-induced DNA dehybridization weakens the binding between H-NS proteins and DNA. This work highlighted the importance of dynamic study of single proteins in live cells for understanding the functions of antimicrobial agents in bacteria.IMPORTANCE As so-called "superbug" bacteria resistant to commonly prescribed antibiotics have become a global threat to public health in recent years, noble metals, such as silver, in various forms have been attracting broad attention due to their antimicrobial activities. However, most of the studies in the existing literature have relied on the traditional bioassays for studying the antimicrobial mechanism of silver; in addition, temporal resolution is largely missing for understanding the effects of silver on the molecular dynamics inside bacteria. Here, we report our study of the antimicrobial effect of silver ions at the nanoscale on the diffusive dynamics of histone-like nucleoid-structuring (H-NS) proteins in live bacteria using single-particle-tracking photoactivated localization microscopy. This work highlights the importance of dynamic study of single proteins in live cells for understanding the functions of antimicrobial agents in bacteria.
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Affiliation(s)
- Asmaa A Sadoon
- Department of Physics, University of Arkansas, Fayetteville, Arkansas, USA
- Microelectronics-Photonics Graduate Program, University of Arkansas, Fayetteville, Arkansas, USA
- Department of Physics, University of Thi Qar, Thi Qar, Iraq
| | - Prabhat Khadka
- Department of Physics, University of Arkansas, Fayetteville, Arkansas, USA
| | - Jack Freeland
- Department of Physics, University of Arkansas, Fayetteville, Arkansas, USA
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas, USA
| | - Ravi Kumar Gundampati
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas, USA
| | - Ryan H Manso
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas, USA
| | - Mason Ruiz
- Department of Physics, University of Arkansas, Fayetteville, Arkansas, USA
- Department of Biological Sciences, University of Arkansas, Fayetteville, Arkansas, USA
| | | | | | - Jingyi Chen
- Microelectronics-Photonics Graduate Program, University of Arkansas, Fayetteville, Arkansas, USA
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas, USA
| | - Yong Wang
- Department of Physics, University of Arkansas, Fayetteville, Arkansas, USA
- Microelectronics-Photonics Graduate Program, University of Arkansas, Fayetteville, Arkansas, USA
- Cell and Molecular Biology Program, University of Arkansas, Fayetteville, Arkansas, USA
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18
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Hansel CS, Holme MN, Gopal S, Stevens MM. Advances in high-resolution microscopy for the study of intracellular interactions with biomaterials. Biomaterials 2020; 226:119406. [DOI: 10.1016/j.biomaterials.2019.119406] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 07/16/2019] [Accepted: 08/01/2019] [Indexed: 12/15/2022]
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19
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Lee S, Higuchi H. 3D rotational motion of an endocytic vesicle on a complex microtubule network in a living cell. BIOMEDICAL OPTICS EXPRESS 2019; 10:6611-6624. [PMID: 31853420 PMCID: PMC6913383 DOI: 10.1364/boe.10.006611] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 11/19/2019] [Accepted: 11/20/2019] [Indexed: 05/24/2023]
Abstract
The transport dynamics of endocytic vesicles in a living cell contains essential biomedical information. Although the movement mechanism of a vesicle by motor proteins has been revealed, understanding the precise movement of vesicles on the cytoskeleton in a living cell has been considered challenging, due to the complex 3D network of cytoskeletons. Here, we specify the shape of the 3D interaction between the vesicle and microtubule, based on the theoretically estimated location of the microtubule and the vesicle trajectory data acquired at high spatial and temporal precision. We detected that vesicles showed more frequent direction changes with either in very acute or in obtuse angles than right angles, on similar time scales in a microtubule network. Interestingly, when a vesicle interacted with a relatively longer (> 400 nm) microtubule filament, rotational movement along the axis of the microtubule was frequently observed. Our results are expected to give in-depth insight into understanding the actual 3D interactions between the intracellular molecule and complex cytoskeletal network.
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20
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Zhou S, Deng C, Xu P, Fan Q, Zhang X, Jia Y, Su L, He Q, Liu Y, Song B. Cellular Metabolism of Fluorescent Nanoprobes Formed by Self-Assembly of Amphiphiles: Dynamic Trafficking from the Golgi Apparatus to the Lysosome. ACS APPLIED BIO MATERIALS 2019; 2:5790-5798. [DOI: 10.1021/acsabm.9b00791] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Pan Xu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | | | | | | | | | | | | | - Bo Song
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
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21
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Adams M, Kozlowska M, Baroni N, Oldenburg M, Ma R, Busko D, Turshatov A, Emandi G, Senge MO, Haldar R, Wöll C, Nienhaus GU, Richards BS, Howard IA. Highly Efficient One-Dimensional Triplet Exciton Transport in a Palladium-Porphyrin-Based Surface-Anchored Metal-Organic Framework. ACS APPLIED MATERIALS & INTERFACES 2019; 11:15688-15697. [PMID: 30938507 DOI: 10.1021/acsami.9b03079] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Efficient photon-harvesting materials require easy-to-deposit materials exhibiting good absorption and excited-state transport properties. We demonstrate an organic thin-film material system, a palladium-porphyrin-based surface-anchored metal-organic framework (SURMOF) thin film that meets these requirements. Systematic investigations using transient absorption spectroscopy confirm that triplets are very mobile within single crystalline domains; a detailed analysis reveals a triplet transfer rate on the order of 1010 s-1. The crystalline nature of the SURMOFs also allows a thorough theoretical analysis using the density functional theory. The theoretical results reveal that the intermolecular exciton transfer can be described by a Dexter electron exchange mechanism that is considerably enhanced by virtual charge-transfer exciton intermediates. On the basis of the photophysical results, we predict exciton diffusion lengths on the order of several micrometers in perfectly ordered, single-crystalline SURMOFs. In the presently available samples, strong interactions of excitons with domain boundaries present in these metal-organic thin films limit the diffusion length to the diameter of these two-dimensional grains, which amount to about 100 nm. Our results demonstrate high potential of SURMOFs for light-harvesting applications.
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Affiliation(s)
| | | | | | | | - Rui Ma
- Institute of Applied Physics , Karlsruhe Institute of Technology , Wolfgang-Gaede-Straße 1 , 76131 Karlsruhe , Germany
| | | | | | - Ganapathi Emandi
- School of Chemistry, SFI Tetrapyrrole Laboratory, Trinity Biomedical Sciences Institute, Trinity College Dublin , The University of Dublin , 152-160 Pearse Street , 2 Dublin , Ireland
| | - Mathias O Senge
- School of Chemistry, SFI Tetrapyrrole Laboratory, Trinity Biomedical Sciences Institute, Trinity College Dublin , The University of Dublin , 152-160 Pearse Street , 2 Dublin , Ireland
| | | | | | - G Ulrich Nienhaus
- Institute of Applied Physics , Karlsruhe Institute of Technology , Wolfgang-Gaede-Straße 1 , 76131 Karlsruhe , Germany
- Department of Physics , University of Illinois at Urbana-Champaign , 1110 West Green Street , Urbana , 61801 Illinois , United States
| | - Bryce S Richards
- Light Technology Institute , Karlsruhe Institute of Technology , Wolfgang-Gaede-Straße 1 , 76131 Karlsruhe , Germany
| | - Ian A Howard
- Light Technology Institute , Karlsruhe Institute of Technology , Wolfgang-Gaede-Straße 1 , 76131 Karlsruhe , Germany
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22
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Wang H, Ma R, Nienhaus K, Nienhaus GU. Formation of a Monolayer Protein Corona around Polystyrene Nanoparticles and Implications for Nanoparticle Agglomeration. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1900974. [PMID: 31021510 DOI: 10.1002/smll.201900974] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 04/08/2019] [Indexed: 05/23/2023]
Abstract
Nanoparticle (NP) interactions with cells and organisms are mediated by a biomolecular adsorption layer, the so-called "protein corona." An in-depth understanding of the corona is a prerequisite to successful and safe application of NPs in biology and medicine. In this work, earlier in situ investigations on small NPs are extended to large polystyrene (PS) NPs of up to 100 nm diameter, using human transferrin (Tf) and human serum albumin (HSA) as model proteins. Direct NP sizing experiments reveal a reversibly bound monolayer protein shell (under saturating conditions) on hydrophilic, carboxyl-functionalized (PS-COOH) NPs, as was earlier observed for much smaller NPs. In contrast, protein binding on hydrophobic, sulfated (PS-OSO3 H) NPs in solvent of low ionic strength is completely irreversible; nevertheless, the thickness of the observed protein corona again corresponds to a protein monolayer. Under conditions of reduced charge repulsion (higher ionic strength), the NPs are colloidally unstable and form large clusters below a certain protein-NP stoichiometric ratio, indicating that the adsorbed proteins induce NP agglomeration. This comprehensive characterization of the persistent protein corona on PS-OSO3 H NPs by nanoparticle sizing and quantitative fluorescence microscopy/nanoscopy reveals mechanistic aspects of molecular interactions occurring during exposure of NPs to biofluids.
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Affiliation(s)
- Haixia Wang
- Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), 76131, Karlsruhe, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
| | - Rui Ma
- Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), 76131, Karlsruhe, Germany
| | - Karin Nienhaus
- Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), 76131, Karlsruhe, Germany
| | - Gerd Ulrich Nienhaus
- Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), 76131, Karlsruhe, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology (KIT), 76344, Eggenstein-Leopoldshafen, Germany
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
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23
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Pujals S, Feiner-Gracia N, Delcanale P, Voets I, Albertazzi L. Super-resolution microscopy as a powerful tool to study complex synthetic materials. Nat Rev Chem 2019. [DOI: 10.1038/s41570-018-0070-2] [Citation(s) in RCA: 105] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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24
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Kowoll T, Fritsch-Decker S, Diabaté S, Nienhaus GU, Gerthsen D, Weiss C. Assessment of in vitro particle dosimetry models at the single cell and particle level by scanning electron microscopy. J Nanobiotechnology 2018; 16:100. [PMID: 30526603 PMCID: PMC6284276 DOI: 10.1186/s12951-018-0426-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 11/22/2018] [Indexed: 01/18/2023] Open
Abstract
Background Particokinetic models are important to predict the effective cellular dose, which is key to understanding the interactions of particles with biological systems. For the reliable establishment of dose–response curves in, e.g., the field of pharmacology and toxicology, mostly the In vitro Sedimentation, Diffusion and Dosimetry (ISDD) and Distorted Grid (DG) models have been employed. Here, we used high resolution scanning electron microscopy to quantify deposited numbers of particles on cellular and intercellular surfaces and compare experimental findings with results predicted by the ISDD and DG models. Results Exposure of human lung epithelial A549 cells to various concentrations of differently sized silica particles (100, 200 and 500 nm) revealed a remarkably higher dose deposited on intercellular regions compared to cellular surfaces. The ISDD and DG models correctly predicted the areal densities of particles in the intercellular space when a high adsorption (“stickiness”) to the surface was emulated. In contrast, the lower dose on cells was accurately inferred by the DG model in the case of “non-sticky” boundary conditions. Finally, the presence of cells seemed to enhance particle deposition, as aerial densities on cell-free substrates were clearly reduced. Conclusions Our results further validate the use of particokinetic models but also demonstrate their limitations, specifically, with respect to the spatial distribution of particles on heterogeneous surfaces. Consideration of surface properties with respect to adhesion and desorption should advance modelling approaches to ultimately predict the cellular dose with higher precision. Electronic supplementary material The online version of this article (10.1186/s12951-018-0426-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Thomas Kowoll
- Laboratory for Electron Microscopy, Karlsruhe Institute of Technology (KIT), Campus South, Engesserstr. 7, 76131, Karlsruhe, Germany.
| | - Susanne Fritsch-Decker
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology (KIT), Campus North, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Silvia Diabaté
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology (KIT), Campus North, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Gerd Ulrich Nienhaus
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology (KIT), Campus North, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.,Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), Campus South, Wolfgang-Gaede-Str. 1, 76131, Karlsruhe, Germany.,Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Campus North, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.,Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Dagmar Gerthsen
- Laboratory for Electron Microscopy, Karlsruhe Institute of Technology (KIT), Campus South, Engesserstr. 7, 76131, Karlsruhe, Germany
| | - Carsten Weiss
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology (KIT), Campus North, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
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25
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Zhou L, Obhof T, Schneider K, Feldbrügge M, Nienhaus GU, Kämper J. Cytoplasmic Transport Machinery of the SPF27 Homologue Num1 in Ustilago maydis. Sci Rep 2018; 8:3611. [PMID: 29483520 PMCID: PMC5832149 DOI: 10.1038/s41598-018-21628-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 02/07/2018] [Indexed: 01/15/2023] Open
Abstract
In the phytopathogenic basidiomycete Ustilago maydis, the Num1 protein has a pivotal function in hyphal morphogenesis. Num1 functions as a core component of the spliceosome-associated Prp19/CDC5 complex (NTC). The interaction of Num1 with the kinesin motor Kin1 suggests a connection between a component of the splicing machinery and cytoplasmic trafficking processes. Previously it was shown that Num1 localizes predominantly in the nucleus; however, due to the diffraction-limited spatial resolution of conventional optical microscopy, it was not possible to attribute the localization to specific structures within the cytoplasm. We have now employed super-resolution localization microscopy to visualize Num1 in the cytoplasm by fusing it to a tandem dimeric Eos fluorescent protein (tdEosFP). The Num1 protein is localized within the cytoplasm with an enhanced density in the vicinity of microtubules. Num1 movement is found predominantly close to the nucleus. Movement is dependent on its interaction partner Kin1, but independent of Kin3. Our results provide strong evidence that, in addition to its involvement in splicing in the nucleus, Num1 has an additional functional role in the cytosol connected to the Kin1 motor protein.
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Affiliation(s)
- Lu Zhou
- Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany.,Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Theresa Obhof
- Department of Genetics, Institute of Applied Biosciences, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Karina Schneider
- Department of Genetics, Institute of Applied Biosciences, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
| | - Michael Feldbrügge
- Institute of Microbiology, Cluster of Excellence on Plant Sciences, Heinrich-Heine-University, Düsseldorf, Germany
| | - G Ulrich Nienhaus
- Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany. .,Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany. .,Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL, USA. .,Institute of Toxicology and Genetics, Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany.
| | - Jörg Kämper
- Department of Genetics, Institute of Applied Biosciences, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany.
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26
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Liu YL, Perillo EP, Liu C, Yu P, Chou CK, Hung MC, Dunn AK, Yeh HC. Segmentation of 3D Trajectories Acquired by TSUNAMI Microscope: An Application to EGFR Trafficking. Biophys J 2017; 111:2214-2227. [PMID: 27851944 DOI: 10.1016/j.bpj.2016.09.041] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 09/22/2016] [Accepted: 09/26/2016] [Indexed: 11/30/2022] Open
Abstract
Whereas important discoveries made by single-particle tracking have changed our view of the plasma membrane organization and motor protein dynamics in the past three decades, experimental studies of intracellular processes using single-particle tracking are rather scarce because of the lack of three-dimensional (3D) tracking capacity. In this study we use a newly developed 3D single-particle tracking method termed TSUNAMI (Tracking of Single particles Using Nonlinear And Multiplexed Illumination) to investigate epidermal growth factor receptor (EGFR) trafficking dynamics in live cells at 16/43 nm (xy/z) spatial resolution, with track duration ranging from 2 to 10 min and vertical tracking depth up to tens of microns. To analyze the long 3D trajectories generated by the TSUNAMI microscope, we developed a trajectory analysis algorithm, which reaches 81% segment classification accuracy in control experiments (termed simulated movement experiments). When analyzing 95 EGF-stimulated EGFR trajectories acquired in live skin cancer cells, we find that these trajectories can be separated into three groups-immobilization (24.2%), membrane diffusion only (51.6%), and transport from membrane to cytoplasm (24.2%). When EGFRs are membrane-bound, they show an interchange of Brownian diffusion and confined diffusion. When EGFRs are internalized, transitions from confined diffusion to directed diffusion and from directed diffusion back to confined diffusion are clearly seen. This observation agrees well with the model of clathrin-mediated endocytosis.
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Affiliation(s)
- Yen-Liang Liu
- Department of Biomedical Engineering, University of Texas at Austin, Austin, Texas
| | - Evan P Perillo
- Department of Biomedical Engineering, University of Texas at Austin, Austin, Texas
| | - Cong Liu
- Department of Biomedical Engineering, University of Texas at Austin, Austin, Texas
| | - Peter Yu
- Department of Biomedical Engineering, University of Texas at Austin, Austin, Texas
| | - Chao-Kai Chou
- Department of Molecular and Cellular Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas; Center for Molecular Medicine and Graduate Institute of Cancer Biology, China Medical University, Taichung, Taiwan
| | - Mien-Chie Hung
- Department of Molecular and Cellular Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas; Center for Molecular Medicine and Graduate Institute of Cancer Biology, China Medical University, Taichung, Taiwan
| | - Andrew K Dunn
- Department of Biomedical Engineering, University of Texas at Austin, Austin, Texas
| | - Hsin-Chih Yeh
- Department of Biomedical Engineering, University of Texas at Austin, Austin, Texas.
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27
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Lu J, Zong S, Wang Z, Chen C, Zhang Y, Cui Y. Yolk-shell type nanoprobe with excellent fluorescence 'blinking' behavior for optical super resolution imaging. NANOTECHNOLOGY 2017; 28:265701. [PMID: 28593936 DOI: 10.1088/1361-6528/aa7536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A new yolk-shell type nanoprobe for super-resolution imaging is demonstrated. Using the proposed nanoprobe and single molecule localization based super resolution imaging strategy, intracellular nanoparticle tracking and super-resolution imaging are realized. The localization precision is about 50 nm and single-molecule localization microscopy using the proposed nanoprobe requires only one single excitation laser and no specific imaging buffer.
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Affiliation(s)
- Ju Lu
- Advanced Photonics Center, Southeast University, Nanjing 210096, Jiangsu, People's Republic of China
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28
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Giani M, den Otter WK, Briels WJ. Early stages of clathrin aggregation at a membrane in coarse-grained simulations. J Chem Phys 2017; 146:155102. [DOI: 10.1063/1.4979985] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Affiliation(s)
- M. Giani
- Multi Scale Mechanics, Faculty of Engineering Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
- Computational BioPhysics, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
- MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - W. K. den Otter
- Multi Scale Mechanics, Faculty of Engineering Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
- Computational BioPhysics, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
- MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - W. J. Briels
- Computational BioPhysics, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
- MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
- Forschungszentrum Jülich, ICS 3, D-52425 Jülich, Germany
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29
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Shang L, Gao P, Wang H, Popescu R, Gerthsen D, Nienhaus GU. Protein-based fluorescent nanoparticles for super-resolution STED imaging of live cells. Chem Sci 2016; 8:2396-2400. [PMID: 28451345 PMCID: PMC5369336 DOI: 10.1039/c6sc04664a] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 12/16/2016] [Indexed: 12/17/2022] Open
Abstract
Protein-based fluorescent nanoparticles with excellent biocompatibility, good colloidal stability and photostability have been synthesized as attractive markers for STED nanoscopy in biological imaging.
Development of nanoparticles for super-resolution imaging (sriNPs) can greatly enrich the toolbox of robust optical probes for biological studies. Moreover, sriNPs enable us to monitor the behavior of engineered nanomaterials in complex biological environments with high spatial resolution, which is important for advancing our understanding of nano–bio interactions. Up to now, reports on sriNPs have been scarce. In this work, we report a facile strategy to prepare protein-based fluorescent NPs that can be utilized as probes in super-resolution microscopy. The method is simple and straightforward, and easily extendible to other types of fluorophores. By using Atto647N–transferrin NPs as an example, we have achieved a roughly four-fold resolution improvement by using STED nanoscopy. These protein-based sriNPs possess excellent biocompatibility, good colloidal stability and photostability, making them attractive candidates for biological studies. Moreover, STED nanoscopy enables the precise imaging of NP structures in living cells, and revealed the co-existence of multiple NPs within one endosomal vesicle.
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Affiliation(s)
- Li Shang
- Institute of Applied Physics , Karlsruhe Institute of Technology (KIT) , 76131 Karlsruhe , Germany.,Institute of Nanotechnology , Karlsruhe Institute of Technology (KIT) , 76344 Eggenstein-Leopoldshafen , Germany.,Center for Nano Energy Materials , School of Materials Science and Engineering , Northwestern Polytechnical University , 710072 , Xi'an , China .
| | - Peng Gao
- Institute of Applied Physics , Karlsruhe Institute of Technology (KIT) , 76131 Karlsruhe , Germany.,Institute of Nanotechnology , Karlsruhe Institute of Technology (KIT) , 76344 Eggenstein-Leopoldshafen , Germany
| | - Haixia Wang
- Institute of Applied Physics , Karlsruhe Institute of Technology (KIT) , 76131 Karlsruhe , Germany
| | - Radian Popescu
- Laboratory of Electron Microscopy , Karlsruhe Institute of Technology (KIT) , 76131 Karlsruhe , Germany
| | - Dagmar Gerthsen
- Laboratory of Electron Microscopy , Karlsruhe Institute of Technology (KIT) , 76131 Karlsruhe , Germany
| | - Gerd Ulrich Nienhaus
- Institute of Applied Physics , Karlsruhe Institute of Technology (KIT) , 76131 Karlsruhe , Germany.,Institute of Nanotechnology , Karlsruhe Institute of Technology (KIT) , 76344 Eggenstein-Leopoldshafen , Germany.,Institute of Toxicology and Genetics , Karlsruhe Institute of Technology (KIT) , 76344 Eggenstein-Leopoldshafen , Germany.,Department of Physics , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , USA .
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30
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Elbaradei A, Brown SL, Miller JB, May S, Hobbie EK. Interaction of polymer-coated silicon nanocrystals with lipid bilayers and surfactant interfaces. Phys Rev E 2016; 94:042804. [PMID: 27841530 DOI: 10.1103/physreve.94.042804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Indexed: 06/06/2023]
Abstract
We use photoluminescence (PL) microscopy to measure the interaction between polyethylene-glycol-coated (PEGylated) silicon nanocrystals (SiNCs) and two model surfaces: lipid bilayers and surfactant interfaces. By characterizing the photostability, transport, and size-dependent emission of the PEGylated nanocrystal clusters, we demonstrate the retention of red PL suitable for detection and tracking with minimal blueshift after a year in an aqueous environment. The predominant interaction measured for both interfaces is short-range repulsion, consistent with the ideal behavior anticipated for PEGylated phospholipid coatings. However, we also observe unanticipated attractive behavior in a small number of scenarios for both interfaces. We attribute this anomaly to defective PEG coverage on a subset of the clusters, suggesting a possible strategy for enhancing cellular uptake by controlling the homogeneity of the PEG corona. In both scenarios, the shape of the apparent potential is modeled through the free or bound diffusion of the clusters near the confining interface.
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Affiliation(s)
- Ahmed Elbaradei
- North Dakota State University, Fargo, North Dakota 58108, USA
| | - Samuel L Brown
- North Dakota State University, Fargo, North Dakota 58108, USA
| | - Joseph B Miller
- North Dakota State University, Fargo, North Dakota 58108, USA
| | - Sylvio May
- North Dakota State University, Fargo, North Dakota 58108, USA
| | - Erik K Hobbie
- North Dakota State University, Fargo, North Dakota 58108, USA
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