101
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Bhattacharjee J, Mishra S, Das AP. Recent Advances in Sensor-Based Detection of Toxic Dyes for Bioremediation Application: a Review. Appl Biochem Biotechnol 2021; 194:4745-4764. [PMID: 34799825 DOI: 10.1007/s12010-021-03767-7] [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: 09/27/2021] [Accepted: 11/08/2021] [Indexed: 01/02/2023]
Abstract
Extensive use of these harmful dyes has resulted in the surplus presence of these emerging pollutants in the environment, thus demanding an instant and sensitive detection method. Various synthetic dyes are illegitimately mixed into food and other consuming items for displaying bright colours that attracts consumers. The synthetic dyes cause a number of environmental health hazards and promote toxicity, mutagenicity and carcinogenicity in humans. Despite these serious health glitches, synthetic dyes are widely used due to their much lower cost. As a result, a faster, more selective and extremely sensitive technology for detecting and quantifying hazardous dyes in trace amount is urgently needed. This topic is currently in its initial phases of development and needs continuous refinements, such as explaining various sensing methods and potential future uses linked with dye detection technologies. The present review encompasses a comprehensive literature survey on detection of dyes and latest progress in developing sensors for dye detection and summarizes different detection mechanisms, including biosensor-, optical- and electrochemical-based sensors. Detection methodologies are examined with a focus on biosensor-based recent advancements in dye detection and the growing demand for more appropriate systems in terms of accuracy and efficiency.
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Affiliation(s)
| | - Sunanda Mishra
- Department of Botany, Orissa University of Agriculture and Technology, Bhubaneswar, Odisha, India
| | - Alok Prasad Das
- Department of Life Science, Rama Devi Women's University, Bhubaneswar, Odisha, India.
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102
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Ovechkina VS, Zakian SM, Medvedev SP, Valetdinova KR. Genetically Encoded Fluorescent Biosensors for Biomedical Applications. Biomedicines 2021; 9:biomedicines9111528. [PMID: 34829757 PMCID: PMC8615007 DOI: 10.3390/biomedicines9111528] [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: 09/13/2021] [Revised: 10/20/2021] [Accepted: 10/22/2021] [Indexed: 11/16/2022] Open
Abstract
One of the challenges of modern biology and medicine is to visualize biomolecules in their natural environment, in real-time and in a non-invasive fashion, so as to gain insight into their physiological behavior and highlight alterations in pathological settings, which will enable to devise appropriate therapeutic strategies. Genetically encoded fluorescent biosensors constitute a class of imaging agents that enable visualization of biological processes and events directly in situ, preserving the native biological context and providing detailed insight into their localization and dynamics in cells. Real-time monitoring of drug action in a specific cellular compartment, organ, or tissue type; the ability to screen at the single-cell resolution; and the elimination of false-positive results caused by low drug bioavailability that is not detected by in vitro testing methods are a few of the obvious benefits of using genetically encoded fluorescent biosensors in drug screening. This review summarizes results of the studies that have been conducted in the last years toward the fabrication of genetically encoded fluorescent biosensors for biomedical applications with a comprehensive discussion on the challenges, future trends, and potential inputs needed for improving them.
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Affiliation(s)
- Vera S. Ovechkina
- The Federal Research Center Institute of Cytology and Genetics, The Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia; (V.S.O.); (S.M.Z.); (S.P.M.)
- Department of Natural Sciences, Novosibirsk State University, 630090 Novosibirsk, Russia
| | - Suren M. Zakian
- The Federal Research Center Institute of Cytology and Genetics, The Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia; (V.S.O.); (S.M.Z.); (S.P.M.)
- E.N. Meshalkin National Medical Research Center, Ministry of Health of the Russian Federation, 630055 Novosibirsk, Russia
- Institute of Chemical Biology and Fundamental Medicine, The Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia
| | - Sergey P. Medvedev
- The Federal Research Center Institute of Cytology and Genetics, The Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia; (V.S.O.); (S.M.Z.); (S.P.M.)
- E.N. Meshalkin National Medical Research Center, Ministry of Health of the Russian Federation, 630055 Novosibirsk, Russia
- Institute of Chemical Biology and Fundamental Medicine, The Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia
| | - Kamila R. Valetdinova
- The Federal Research Center Institute of Cytology and Genetics, The Siberian Branch of the Russian Academy of Sciences, 630090 Novosibirsk, Russia; (V.S.O.); (S.M.Z.); (S.P.M.)
- E.N. Meshalkin National Medical Research Center, Ministry of Health of the Russian Federation, 630055 Novosibirsk, Russia
- Correspondence:
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103
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He M, Wang X, Bian Y, Yang M, Deng Y, Liu T, Li Y, Chen F, Xu B, Xu M, Zhang F. Modeling the distribution of malachite green in zebrafish using matrix-assisted laser desorption/ionization mass spectrometry imaging. Anal Bioanal Chem 2021; 413:7021-7030. [PMID: 34642779 DOI: 10.1007/s00216-021-03664-2] [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: 05/09/2021] [Revised: 09/12/2021] [Accepted: 09/14/2021] [Indexed: 11/28/2022]
Abstract
Understanding the spatial distribution of bioactive small molecules is indispensable for elucidating their biological or pharmaceutical roles. Here, a rapid and effective analysis strategy was introduced to study the distribution of veterinary drugs in aquatic products. Malachite green (MG), one of the most widely used veterinary drugs in aquaculture, was selected as the targeted compound. Zebrafish (Danio rerio) was used as a model organism. After an exposure test, the matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI) technique was applied to directly analyze the content changes of malachite green in zebrafish tissues. The reliable relationship of exposure time and content change of MG was described precisely by the extended Freundlich equation. The process of modeling was discussed in detail, and some important parameters or trend information was obtained, including the maximum content of MG in different fish tissues, time to maximum content, elimination time, equilibrium content, and so on. With a simplification of sample pretreatment, this research strategy can be used for monitoring the spatial distribution of veterinary drugs and related metabolites of laboratory-exposed fish. The obtained model can provide a perspective for rational drug use in aquaculture and precise drug residue detection in production activities.
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Affiliation(s)
- Muyi He
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China
| | - Xiujuan Wang
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China
| | - Yu Bian
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China
- College of Pharmacy, China Medical University, Shenyang, 110000, China
| | - Minli Yang
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China
| | - Yamei Deng
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China
- College of Pharmacy, China Medical University, Shenyang, 110000, China
| | - Tong Liu
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China
| | - Yinlong Li
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China
| | - Fengming Chen
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China
| | - Bozhou Xu
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China
| | - Meixia Xu
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China
| | - Feng Zhang
- Institute of Food Safety, Chinese Academy of Inspection and Quarantine, Beijing, 100176, China.
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104
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Ito S, Sekine R, Munakata M, Yamashita M, Tachikawa T. Mechanochromic Luminescence (MCL) of Purely Organic Two-Component Dyes: Wide-Range MCL over 300 nm and Two-Step MCL by Charge-Transfer Complexation. Chemistry 2021; 27:13982-13990. [PMID: 34405922 DOI: 10.1002/chem.202102700] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Indexed: 12/30/2022]
Abstract
Despite recent extensive studies on mechanochromic luminescence (MCL), rational control over the magnitude of the emission-wavelength shift in response to mechanical stimuli remains challenging. In the present study, a two-component donor-acceptor approach has been applied to create a variety of organic MCL composites that exhibit remarkable emission-wavelength switching. Dibenzofuran-based bis(1-pyrenylmethyl)diamine and typical organic fluorophores have been employed as donor and acceptor dyes, respectively. Outstanding wide-range MCL with an emission-wavelength shift of over 300 nm has been achieved by mixing the diamine with 3,4,9,10-perylenetetracarboxylic diimide. Unprecedented two-step MCL in response to mechanical stimuli of different intensity has also been realized for a two-component mixture with 9,10-anthraquinone. Fluorescence microscopy observations at the single-particle level revealed that the segregation and mixing of the two-component dyes contribute to the stimuli-responsive emission-color switching of the MCL composites.
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Affiliation(s)
- Suguru Ito
- Department of Chemistry and Life Science, Graduate School of Engineering Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
| | - Ryohei Sekine
- Department of Chemistry and Life Science, Graduate School of Engineering Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
| | - Masayasu Munakata
- Department of Chemistry and Life Science, Graduate School of Engineering Science, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
| | - Maho Yamashita
- Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, 657-8501, Japan
| | - Takashi Tachikawa
- Department of Chemistry, Graduate School of Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, 657-8501, Japan.,Molecular Photoscience Research Center, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, 657-8501, Japan
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105
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106
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Chen X, Liu T, Qin X, Nguyen QQ, Lee SK, Lee C, Ren Y, Chu J, Zhu G, Yoon TY, Park CY, Park H. Simultaneous Real-Time Three-Dimensional Localization and FRET Measurement of Two Distinct Particles. NANO LETTERS 2021; 21:7479-7485. [PMID: 34491760 DOI: 10.1021/acs.nanolett.1c01328] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Many biological processes employ mechanisms involving the locations and interactions of multiple components. Given that most biological processes occur in three dimensions, the simultaneous measurement of three-dimensional locations and interactions is necessary. However, the simultaneous three-dimensional precise localization and measurement of interactions in real time remains challenging. Here, we report a new microscopy technique to localize two spectrally distinct particles in three dimensions with an accuracy (2.35σ) of tens of nanometers with an exposure time of 100 ms and to measure their real-time interactions using fluorescence resonance energy transfer (FRET) simultaneously. Using this microscope, we tracked two distinct vesicles containing t-SNAREs or v-SNARE in three dimensions and observed FRET simultaneously during single-vesicle fusion in real time, revealing the nanoscale motion and interactions of single vesicles in vesicle fusion. Thus, this study demonstrates that our microscope can provide detailed information about real-time three-dimensional nanoscale locations, motion, and interactions in biological processes.
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Affiliation(s)
- Xingxiang Chen
- Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Teng Liu
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Xianan Qin
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Quang Quan Nguyen
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Sang Kwon Lee
- Department of Biological Sciences, School of Life Sciences, UNIST, 44919, Ulsan, Republic of Korea
| | - Chanwoo Lee
- School of Biological Sciences and Institute of Molecular Biology and Genetics, Seoul National University, Seoul 08826, South Korea
| | - Yaguang Ren
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Jun Chu
- Research Lab for Biomedical Optics and Molecular Imaging, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Guang Zhu
- Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
- Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Tae-Young Yoon
- School of Biological Sciences and Institute of Molecular Biology and Genetics, Seoul National University, Seoul 08826, South Korea
| | - Chan Young Park
- Department of Biological Sciences, School of Life Sciences, UNIST, 44919, Ulsan, Republic of Korea
| | - Hyokeun Park
- Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
- State Key Laboratory of Molecular Neuroscience The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
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107
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Ferrel C, Rayamajhi S, Nguyen T, Marasini R, Saravanan T, Deba F, Aryal S. Re-engineering a Liposome with Membranes of Red Blood Cells for Drug Delivery and Diagnostic Applications. ACS APPLIED BIO MATERIALS 2021; 4:6974-6981. [PMID: 35006930 DOI: 10.1021/acsabm.1c00643] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Red blood cells (RBCs) make up the overwhelming majority of cells in the vascular system, spending most of their lives wandering the vast network of vessels that permeate every tissue of our bodies. Therefore, the delivery of any class of therapeutic agent that must stay in the circulatory system may benefit from being carried by RBCs. Toward this direction, we have re-engineered a synthetic liposome with the membranes of RBCs and incorporated a magnetic resonance imaging (MRI) contrast agent gadolinium along with the chemotherapeutic drug doxorubicin (DOX) to form a biomimetic liposome (BML). The BMLs proposed herein consist of biocompatible/biodegradable synthetic phospholipids, which include 1,2-distearoyl-sn-glycero-3-phosphoglycerol, 1,2-distearoyl-sn-glycero-3-phosphoethanolamine, and gadolinium-conjugated lipids. These synthetic phospholipids have been fused with a natural RBC membrane and are loaded with DOX using the extrusion technique. BMLs were characterized for their physicochemical properties, stability, fusogenic (between synthetic and natural lipid from RBC), magnetic, drug loading, biocompatibility, and cytotoxicity properties. BMLs had a hydrodynamic diameter of 180 ± 20 nm with a negative surface charge of 29 ± 2 mV. The longitudinal relaxivity (r1) of BML is 3.71 mM-1 s-1, which is comparable to the r1 of commercial contrast agent, Magnevist. In addition, DOX-loaded BML showed a cytotoxicity pattern similar to that of free DOX. These results showed the potential of using the proposed BML system for both MRI-based diagnostic applications and drug delivery platforms.
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Affiliation(s)
- Colin Ferrel
- Nanotechnology Innovation Center of Kansas State (NICKS), Kansas State University, Manhattan, Kansas 66506, United States.,Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
| | - Sagar Rayamajhi
- Nanotechnology Innovation Center of Kansas State (NICKS), Kansas State University, Manhattan, Kansas 66506, United States.,Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
| | - Tuyen Nguyen
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, United States
| | - Ramesh Marasini
- Nanotechnology Innovation Center of Kansas State (NICKS), Kansas State University, Manhattan, Kansas 66506, United States.,Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
| | - Tanvikhaa Saravanan
- Department of Pharmaceutical Sciences and Health Outcomes, The Ben and Maytee Fisch College of Pharmacy, The University of Texas, Tyler, Texas 75799, United States
| | - Farah Deba
- Department of Pharmaceutical Sciences and Health Outcomes, The Ben and Maytee Fisch College of Pharmacy, The University of Texas, Tyler, Texas 75799, United States
| | - Santosh Aryal
- Department of Pharmaceutical Sciences and Health Outcomes, The Ben and Maytee Fisch College of Pharmacy, The University of Texas, Tyler, Texas 75799, United States
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108
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Angsutararux P, Kang PW, Zhu W, Silva JR. Conformations of voltage-sensing domain III differentially define NaV channel closed- and open-state inactivation. J Gen Physiol 2021; 153:212533. [PMID: 34347027 PMCID: PMC8348240 DOI: 10.1085/jgp.202112891] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 07/14/2021] [Indexed: 11/21/2022] Open
Abstract
Voltage-gated Na+ (NaV) channels underlie the initiation and propagation of action potentials (APs). Rapid inactivation after NaV channel opening, known as open-state inactivation, plays a critical role in limiting the AP duration. However, NaV channel inactivation can also occur before opening, namely closed-state inactivation, to tune the cellular excitability. The voltage-sensing domain (VSD) within repeat IV (VSD-IV) of the pseudotetrameric NaV channel α-subunit is known to be a critical regulator of NaV channel inactivation. Yet, the two processes of open- and closed-state inactivation predominate at different voltage ranges and feature distinct kinetics. How inactivation occurs over these different ranges to give rise to the complexity of NaV channel dynamics is unclear. Past functional studies and recent cryo-electron microscopy structures, however, reveal significant inactivation regulation from other NaV channel components. In this Hypothesis paper, we propose that the VSD of NaV repeat III (VSD-III), together with VSD-IV, orchestrates the inactivation-state occupancy of NaV channels by modulating the affinity of the intracellular binding site of the IFMT motif on the III-IV linker. We review and outline substantial evidence that VSD-III activates in two distinct steps, with the intermediate and fully activated conformation regulating closed- and open-state inactivation state occupancy by altering the formation and affinity of the IFMT crevice. A role of VSD-III in determining inactivation-state occupancy and recovery from inactivation suggests a regulatory mechanism for the state-dependent block by small-molecule anti-arrhythmic and anesthetic therapies.
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Affiliation(s)
- Paweorn Angsutararux
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO
| | - Po Wei Kang
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO
| | - Wandi Zhu
- Department of Medicine, Brigham and Women's Hospital, Boston, MA
| | - Jonathan R Silva
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO
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109
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Drugging the undruggable proteins in cancer: A systems biology approach. Curr Opin Chem Biol 2021; 66:102079. [PMID: 34426091 DOI: 10.1016/j.cbpa.2021.07.004] [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: 06/02/2021] [Revised: 07/20/2021] [Accepted: 07/21/2021] [Indexed: 12/30/2022]
Abstract
In recent years, the research community has, with comprehensive systems biology approaches and related technologies, gained insight into the vast complexity of numerous cancers. These approaches allow an in-depth exploration that cannot be achieved solely using conventional low-throughput methods, which do not closely mimic the natural cellular environment. In this review, we discuss recent integrative multiple omics approaches for understanding and modulating previously identified 'undruggable' targets such as members of the RAS family, MYC, TP53, and various E3 ligases and deubiquitinases. We describe how these technologies have revolutionized drug discovery by overcoming an array of biological and technological challenges and how, in the future, they will be pivotal in assessing cancer states in individual patients, allowing for the prediction and application of personalized disease treatments.
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110
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McPherson KS, Korzhnev DM. Targeting protein-protein interactions in the DNA damage response pathways for cancer chemotherapy. RSC Chem Biol 2021; 2:1167-1195. [PMID: 34458830 PMCID: PMC8342002 DOI: 10.1039/d1cb00101a] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 06/20/2021] [Indexed: 12/11/2022] Open
Abstract
Cellular DNA damage response (DDR) is an extensive signaling network that orchestrates DNA damage recognition, repair and avoidance, cell cycle progression and cell death. DDR alteration is a hallmark of cancer, with the deficiency in one DDR capability often compensated by a dependency on alternative pathways endowing cancer cells with survival and growth advantage. Targeting these DDR pathways has provided multiple opportunities for the development of cancer therapies. Traditional drug discovery has mainly focused on catalytic inhibitors that block enzyme active sites, which limits the number of potential drug targets within the DDR pathways. This review article describes the emerging approach to the development of cancer therapeutics targeting essential protein-protein interactions (PPIs) in the DDR network. The overall strategy for the structure-based design of small molecule PPI inhibitors is discussed, followed by an overview of the major DNA damage sensing, DNA repair, and DNA damage tolerance pathways with a specific focus on PPI targets for anti-cancer drug design. The existing small molecule inhibitors of DDR PPIs are summarized that selectively kill cancer cells and/or sensitize cancers to front-line genotoxic therapies, and a range of new PPI targets are proposed that may lead to the development of novel chemotherapeutics.
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Affiliation(s)
- Kerry Silva McPherson
- Department of Molecular Biology and Biophysics, University of Connecticut Health Center Farmington CT 06030 USA +1 860 679 3408 +1 860 679 2849
| | - Dmitry M Korzhnev
- Department of Molecular Biology and Biophysics, University of Connecticut Health Center Farmington CT 06030 USA +1 860 679 3408 +1 860 679 2849
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111
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Xu W, Pei G, Liu H, Ju X, Wang J, Ding Q, Li P. Compartmentalization-aided interaction screening reveals extensive high-order complexes within the SARS-CoV-2 proteome. Cell Rep 2021; 36:109482. [PMID: 34297909 PMCID: PMC8285250 DOI: 10.1016/j.celrep.2021.109482] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 05/21/2021] [Accepted: 07/12/2021] [Indexed: 12/12/2022] Open
Abstract
Bearing a relatively large single-stranded RNA genome in nature, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) utilizes sophisticated replication/transcription complexes (RTCs), mainly composed of a network of nonstructural proteins and nucleocapsid protein, to establish efficient infection. In this study, we develop an innovative interaction screening strategy based on phase separation in cellulo, namely compartmentalization of protein-protein interactions in cells (CoPIC). Utilizing CoPIC screening, we map the interaction network among RTC-related viral proteins. We identify a total of 47 binary interactions among 14 proteins governing replication, discontinuous transcription, and translation of coronaviruses. Further exploration via CoPIC leads to the discovery of extensive ternary complexes composed of these components, which infer potential higher-order complexes. Taken together, our results present an efficient and robust interaction screening strategy, and they indicate the existence of a complex interaction network among RTC-related factors, thus opening up opportunities to understand SARS-CoV-2 biology and develop therapeutic interventions for COVID-19.
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Affiliation(s)
- Weifan Xu
- Beijing Advanced Innovation Center for Structural Biology & Frontier Research Center for Biological Structure, Beijing, China; Tsinghua-Peking Center for Life Sciences, Beijing, China; School of Life Sciences, Tsinghua University, Beijing, China
| | - Gaofeng Pei
- Beijing Advanced Innovation Center for Structural Biology & Frontier Research Center for Biological Structure, Beijing, China; Tsinghua-Peking Center for Life Sciences, Beijing, China; School of Life Sciences, Tsinghua University, Beijing, China
| | - Hongrui Liu
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Xiaohui Ju
- Beijing Advanced Innovation Center for Structural Biology & Frontier Research Center for Biological Structure, Beijing, China; School of Medicine, Tsinghua University, Beijing, China
| | - Jing Wang
- Beijing Advanced Innovation Center for Structural Biology & Frontier Research Center for Biological Structure, Beijing, China; Tsinghua-Peking Center for Life Sciences, Beijing, China; School of Life Sciences, Tsinghua University, Beijing, China
| | - Qiang Ding
- Beijing Advanced Innovation Center for Structural Biology & Frontier Research Center for Biological Structure, Beijing, China; School of Medicine, Tsinghua University, Beijing, China
| | - Pilong Li
- Beijing Advanced Innovation Center for Structural Biology & Frontier Research Center for Biological Structure, Beijing, China; Tsinghua-Peking Center for Life Sciences, Beijing, China; School of Life Sciences, Tsinghua University, Beijing, China.
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112
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Çifteci A, Çelik SE, Apak R. Gold–Nanoparticle Based Turn–on Fluorometric Sensor for Quantification of Sulfhydryl and Disulfide Forms of Biothiols: Measurement of Thiol/Disulfide Homeostasis. ANAL LETT 2021. [DOI: 10.1080/00032719.2021.1958830] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Asuman Çifteci
- Department of Chemistry, Faculty of Engineering, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Saliha Esin Çelik
- Department of Chemistry, Faculty of Engineering, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Reşat Apak
- Department of Chemistry, Faculty of Engineering, Istanbul University-Cerrahpasa, Istanbul, Turkey
- Turkish Academy of Sciences (TUBA), Cankaya, Ankara, Turkey
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113
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Wan Y, Holman HA, Hansen C. Interactive Analysis for Large Volume Data from Fluorescence Microscopy at Cellular Precision. COMPUTERS & GRAPHICS 2021; 98:138-149. [PMID: 34602661 PMCID: PMC8486154 DOI: 10.1016/j.cag.2021.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The main objective for understanding fluorescence microscopy data is to investigate and evaluate the fluorescent signal intensity distributions as well as their spatial relationships across multiple channels. The quantitative analysis of 3D fluorescence microscopy data needs interactive tools for researchers to select and focus on relevant biological structures. We developed an interactive tool based on volume visualization techniques and GPU computing for streamlining rapid data analysis. Our main contribution is the implementation of common data quantification functions on streamed volumes, providing interactive analyses on large data without lengthy preprocessing. Data segmentation and quantification are coupled with brushing and executed at an interactive speed. A large volume is partitioned into data bricks, and only user-selected structures are analyzed to constrain the computational load. We designed a framework to assemble a sequence of GPU programs to handle brick borders and stitch analysis results. Our tool was developed in collaboration with domain experts and has been used to identify cell types. We demonstrate a workflow to analyze cells in vestibular epithelia of transgenic mice.
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Affiliation(s)
- Yong Wan
- The University of Utah, Salt Lake City, 84112, USA
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114
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Pang Y, Zhang H, Ai HW. Genetically Encoded Fluorescent Redox Indicators for Unveiling Redox Signaling and Oxidative Toxicity. Chem Res Toxicol 2021; 34:1826-1845. [PMID: 34284580 DOI: 10.1021/acs.chemrestox.1c00149] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Redox-active molecules play essential roles in cell homeostasis, signaling, and other biological processes. Dysregulation of redox signaling can lead to toxic effects and subsequently cause diseases. Therefore, real-time tracking of specific redox-signaling molecules in live cells would be critical for deciphering their functional roles in pathophysiology. Fluorescent protein (FP)-based genetically encoded redox indicators (GERIs) have emerged as valuable tools for monitoring the redox states of various redox-active molecules from subcellular compartments to live organisms. In the first section of this review, we overview the background, focusing on the sensing mechanisms of various GERIs. Next, we review a list of selected GERIs according to their analytical targets and discuss their key biophysical and biochemical properties. In the third section, we provide several examples which applied GERIs to understanding redox signaling and oxidative toxicology in pathophysiological processes. Lastly, a summary and outlook section is included.
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Affiliation(s)
- Yu Pang
- Center for Membrane and Cell Physiology, University of Virginia, Charlottesville, Virginia 22908, United States.,Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Hao Zhang
- Center for Membrane and Cell Physiology, University of Virginia, Charlottesville, Virginia 22908, United States.,Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Hui-Wang Ai
- Center for Membrane and Cell Physiology, University of Virginia, Charlottesville, Virginia 22908, United States.,Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States.,Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, Virginia 22908, United States.,The UVA Cancer Center, University of Virginia, Charlottesville, Virginia 22908, United States
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115
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Ravi Kumara GS, Seo YJ. Polymerase-mediated synthesis of p-vinylaniline-coupled fluorescent DNA for the sensing of nucleolin protein- c-myc G-quadruplex interactions. Org Biomol Chem 2021; 19:5788-5793. [PMID: 34085078 DOI: 10.1039/d1ob00863c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
In this paper we report the synthesis of two deoxyuridine derivatives (dUCN2, dUPy)-featuring p-vinylaniline-based fluorophores linked through a propargyl unit at the 5' position-that function as molecular rotors. This probing system proved to be useful for the sensing of gene regulation arising from interactions between this G-quadruplex and nucleolin.
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Affiliation(s)
| | - Young Jun Seo
- Department of Chemistry, Jeonbuk National University, Jeonju 54896, South Korea.
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116
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Mendonca A, Sánchez OF, Xie J, Carneiro A, Lin L, Yuan C. Identifying distinct heterochromatin regions using combinatorial epigenetic probes in live cells. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2021; 1864:194725. [PMID: 34174495 DOI: 10.1016/j.bbagrm.2021.194725] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 06/16/2021] [Accepted: 06/17/2021] [Indexed: 10/21/2022]
Abstract
The 3D spatial organization of the genome controls gene expression and cell functionality. Heterochromatin (HC), which is the densely compacted and largely silenced part of the chromatin, is the driver for the formation and maintenance of nuclear organization in the mammalian nucleus. It is functionally divided into highly compact constitutive heterochromatin (cHC) and transcriptionally poised facultative heterochromatin (fHC). Long regarded as a static structure, the highly dynamic nature of the heterochromatin is being slowly understood and studied. These changes in HC occur on various temporal scales during the cell cycle and differentiation processes. Most methods that capture information about the heterochromatin are static techniques that cannot provide a readout of how the HC organization evolves with time. The delineation of specific areas such as fHC are also rendered difficult due to its diffusive nature and lack of specific features. Another degree of complexity in characterizing changes in heterochromatin occurs due to the heterogeneity in the HC organization of individual cells, necessitating single cell studies. Overall, there is a need for live cell compatible tools that can stably track the heterochromatin as it undergoes re-organization. In this work, we present an approach to track cHC and fHC based on the epigenetic hallmarks associated with them. Unlike conventional immunostaining approaches, we use small recombinant protein probes that allow us to dynamically monitor the HC by binding to modifications specific to the cHC and fHC, such as H3K9me3, DNA methylation and H3K27me3. We demonstrate the use of the probes to follow the changes in HC induced by drug perturbations at the single cell level. We also use the probe sets combinatorically to simultaneously track chromatin regions enriched in two selected epigenetic modifications using a FRET based approach that enabled us tracking distinctive chromatin features in situ.
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Affiliation(s)
- Agnes Mendonca
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47906, USA
| | - Oscar F Sánchez
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47906, USA
| | - Junkai Xie
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47906, USA
| | - Ana Carneiro
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47906, USA
| | - Li Lin
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47906, USA
| | - Chongli Yuan
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47906, USA; Purdue University Center for Cancer Research, Purdue University, West Lafayette, IN 47906, USA.
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117
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Abstract
Optical imaging, which possesses noninvasive and high-resolution features for biomedical imaging, has been used to study various biological samples, from in vitro cells, ex vivo tissue, to in vivo imaging of living organism. Furthermore, optical imaging also covers a very wide scope of spatial scale, from submicron sized organelles to macro-scale live biological samples, enabling it a powerful tool for biomedical studies. Before introducing these superior optical imaging methods to researchers, first of all, it is necessary to present the basic concept of light-matter interactions such as absorption, scattering, and fluorescence, which can be used as the imaging contrast and also affect the imaging quality. And then the working mechanism of various imaging modalities including fluorescence microscopy, confocal microscopy, multiphoton microscopy, super-resolution microscopy, optical coherence tomography (OCT), diffuse optical tomography (DOT), etc. will be presented. Meanwhile, the main features and typical bioimaging applications of these optical imaging technologies are discussed. Finally, the perspective of future optical imaging methods is presented. The aim of this chapter is to introduce the background and principle of optical imaging for grasping the mechanism of advanced optical imaging modalities introduced in the following chapters.
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118
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Energy transfer followed by electron transfer (ETET) endows a TPE-NBD dyad with enhanced environmental sensitivity. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.12.038] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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119
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Kilic Z, Sgouralis I, Heo W, Ishii K, Tahara T, Pressé S. Extraction of rapid kinetics from smFRET measurements using integrative detectors. CELL REPORTS. PHYSICAL SCIENCE 2021; 2:100409. [PMID: 34142102 PMCID: PMC8208598 DOI: 10.1016/j.xcrp.2021.100409] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Hidden Markov models (HMMs) are used to learn single-molecule kinetics across a range of experimental techniques. By their construction, HMMs assume that single-molecule events occur on slower timescales than those of data acquisition. To move beyond that HMM limitation and allow for single-molecule events to occur on any timescale, we must treat single-molecule events in continuous time as they occur in nature. We propose a method to learn kinetic rates from single-molecule Förster resonance energy transfer (smFRET) data collected by integrative detectors, even if those rates exceed data acquisition rates. To achieve that, we exploit our recently proposed "hidden Markov jump process" (HMJP), with which we learn transition kinetics from parallel measurements in donor and acceptor channels. HMJPs generalize the HMM paradigm in two critical ways: (1) they deal with physical smFRET systems as they switch between conformational states in continuous time, and (2) they estimate transition rates between conformational states directly without having recourse to transition probabilities or assuming slow dynamics. Our continuous-time treatment learns the transition kinetics and photon emission rates for dynamic regimes that are inaccessible to HMMs, which treat system kinetics in discrete time. We validate our framework's robustness on simulated data and demonstrate its performance on experimental data from FRET-labeled Holliday junctions.
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Affiliation(s)
- Zeliha Kilic
- Center for Biological Physics, Department of Physics, Arizona State University, Tempe, AZ 85287, USA
| | - Ioannis Sgouralis
- Department of Mathematics, University of Tennessee, Knoxville, TN 37996, USA
| | - Wooseok Heo
- Molecular Spectroscopy Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Kunihiko Ishii
- Molecular Spectroscopy Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Ultrafast Spectroscopy Research Team, RIKEN Center for Advanced Photonics (RAP), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Tahei Tahara
- Molecular Spectroscopy Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Ultrafast Spectroscopy Research Team, RIKEN Center for Advanced Photonics (RAP), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Steve Pressé
- Center for Biological Physics, Department of Physics, Arizona State University, Tempe, AZ 85287, USA
- School of Molecular Sciences, Arizona State University, Tempe, AZ 85287, USA
- Lead contact
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120
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Han SJ, Noh M, Jang J, Lee JB, Kim KS. Electric fields regulate cellular elasticity through intracellular Ca 2+ concentrations. J Cell Physiol 2021; 236:7450-7463. [PMID: 33993476 DOI: 10.1002/jcp.30417] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 04/25/2021] [Accepted: 04/28/2021] [Indexed: 11/06/2022]
Abstract
Cellular elasticity is a key factor related to a broad range of physiological and pathological processes. The elasticity of a single cell has thus emerged as a potential biomarker to characterize the cellular state. Both internal and external stimuli affect cellular elasticity, and changes in elasticity can cause alterations in cellular characteristics or function. The application of electric fields (EFs) is a promising method that can be used to change cellular elasticity; however, the mechanisms underlying its effect remain unknown. Here, we demonstrate EFs-induced elasticity changes in human dermal fibroblasts and discuss the underlying mechanism related to actin polymerization. Cellular elasticity increases after EF (50 mV/mm) stimulation, reaching a maximum at 30 min before decreasing between 30 and 120 min. The cellular elasticity under EF stimulation, regardless of stimulation time, is higher than that of the control. F-actin regulates the elasticity of cells through gelsolin activation. We show changes in intracellular Ca2+ caused by EFs, which induced gelsolin activation and F-actin content changes. This result demonstrates a series of processes in which external electrical stimulation conditions regulate cellular elasticity.
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Affiliation(s)
- Se Jik Han
- Department of Biomedical Engineering, Graduate School, Kyung Hee University, Seoul, Korea.,Department of Biomedical Engineering, Kyung Hee University, Seoul, Korea
| | - Minjoo Noh
- Innovation Lab, Department of Innovation, Cosmax R&I Center, Gyeonggi do, Korea
| | - Jihui Jang
- Innovation Lab, Department of Innovation, Cosmax R&I Center, Gyeonggi do, Korea
| | - Jun Bae Lee
- Innovation Lab, Department of Innovation, Cosmax R&I Center, Gyeonggi do, Korea
| | - Kyung Sook Kim
- Department of Biomedical Engineering, Kyung Hee University, Seoul, Korea
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121
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Simões M, Urstöger G, Schennach R, Hirn U. Quantification and Imaging of Nanoscale Contact with Förster Resonance Energy Transfer. ACS APPLIED MATERIALS & INTERFACES 2021; 13:19521-19529. [PMID: 33856765 PMCID: PMC8153545 DOI: 10.1021/acsami.1c04226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 04/09/2021] [Indexed: 06/12/2023]
Abstract
Adhesion is caused by molecular interactions that only take place if the surfaces are in nanoscale contact (NSC); i.e., the distance between the surfaces is in the range of 0.1-0.4 nm. However, there are several difficulties measuring the NSC between surfaces, mainly because regions that appear to be in full contact at low magnification may show no NSC when observed at higher magnifications. Thus, the measurement area of NSC is very small with imaging techniques, and an experimental technique to evaluate NSC for large contact areas has not been available thus far. Here, we are proposing Förster resonance energy transfer (FRET) spectroscopy/microscopy for this purpose. We demonstrate that NSC in a distance range of 1-10 nm can be evaluated. Our experiments reveal that, for thin films pressed under different loads, NSC increases with the applied pressure, resulting in a higher FRET signal and a corresponding increase in adhesion force/energy when separating the films. Furthermore, we show that local variations in molecular contact can be visualized with FRET microscopy. Thus, we are introducing a spectroscopic technique for quantification (FRET spectroscopy) and imaging (FRET microscopy) of NSC between surfaces, demonstrated here for the application of surface adhesion. This could be of interest for all fields where adhesion or nanoscale surface contact are playing a role, for example, soft matter, biological materials, and polymers, but also engineering applications, like tribology, adhesives, and sealants.
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Affiliation(s)
- Mónica
G. Simões
- Institute
of Bioproducts and Paper Technology, Inffeldgasse 23, 8010 Graz, Austria
- CD
Laboratory for Fiber Swelling and Paper Performance, Inffeldgasse 23, 8010 Graz, Austria
| | - Georg Urstöger
- Institute
of Bioproducts and Paper Technology, Inffeldgasse 23, 8010 Graz, Austria
- CD
Laboratory for Fiber Swelling and Paper Performance, Inffeldgasse 23, 8010 Graz, Austria
| | - Robert Schennach
- CD
Laboratory for Fiber Swelling and Paper Performance, Inffeldgasse 23, 8010 Graz, Austria
- Institute
of Solid-State Physics, Graz University
of Technology, Petersgasse 16, 8010 Graz, Austria
| | - Ulrich Hirn
- Institute
of Bioproducts and Paper Technology, Inffeldgasse 23, 8010 Graz, Austria
- CD
Laboratory for Fiber Swelling and Paper Performance, Inffeldgasse 23, 8010 Graz, Austria
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122
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Incaviglia I, Frutiger A, Blickenstorfer Y, Treindl F, Ammirati G, Lüchtefeld I, Dreier B, Plückthun A, Vörös J, Reichmuth AM. An Approach for the Real-Time Quantification of Cytosolic Protein-Protein Interactions in Living Cells. ACS Sens 2021; 6:1572-1582. [PMID: 33759497 DOI: 10.1021/acssensors.0c02480] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
In recent years, cell-based assays have been frequently used in molecular interaction analysis. Cell-based assays complement traditional biochemical and biophysical methods, as they allow for molecular interaction analysis, mode of action studies, and even drug screening processes to be performed under physiologically relevant conditions. In most cellular assays, biomolecules are usually labeled to achieve specificity. In order to overcome some of the drawbacks associated with label-based assays, we have recently introduced "cell-based molography" as a biosensor for the analysis of specific molecular interactions involving native membrane receptors in living cells. Here, we expand this assay to cytosolic protein-protein interactions. First, we created a biomimetic membrane receptor by tethering one cytosolic interaction partner to the plasma membrane. The artificial construct is then coherently arranged into a two-dimensional pattern within the cytosol of living cells. Thanks to the molographic sensor, the specific interactions between the coherently arranged protein and its endogenous interaction partners become visible in real time without the use of a fluorescent label. This method turns out to be an important extension of cell-based molography because it expands the range of interactions that can be analyzed by molography to those in the cytosol of living cells.
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Affiliation(s)
- Ilaria Incaviglia
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Andreas Frutiger
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Yves Blickenstorfer
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Fridolin Treindl
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Giulia Ammirati
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Ines Lüchtefeld
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Birgit Dreier
- Department of Biochemistry, University of Zurich, 8057 Zurich, Switzerland
| | - Andreas Plückthun
- Department of Biochemistry, University of Zurich, 8057 Zurich, Switzerland
| | - Janos Vörös
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Andreas M Reichmuth
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zurich, 8092 Zurich, Switzerland
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123
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Okamoto I, Miyaji H, Miyata S, Shitomi K, Sugaya T, Ushijima N, Akasaka T, Enya S, Saita S, Kawasaki H. Antibacterial and Antibiofilm Photodynamic Activities of Lysozyme-Au Nanoclusters/Rose Bengal Conjugates. ACS OMEGA 2021; 6:9279-9290. [PMID: 33842797 PMCID: PMC8028138 DOI: 10.1021/acsomega.1c00838] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 03/16/2021] [Indexed: 05/04/2023]
Abstract
Antibacterial photodynamic therapy (aPDT) utilizes reactive oxygen species such as singlet oxygen (1O2) and free radicals via photosensitizers, which are light and light-sensitive agents, to reduce bacterial infections. It has been utilized as a treatment for dental diseases in place of antibiotic therapies. However, aPDT does not always cause the desired therapeutic effect due to the instability of organic photosensitizers and the formation of bacterial biofilms. To promote the antibacterial and antibiofilm effects of aPDT, we have proposed a lysozyme (Lys)-gold nanoclusters (Au NCs)/rose bengal (Lys-Au NCs/RB) conjugate as a novel photosensitizer. This conjugate was found to effectively impede the growth of both gram-positive and gram-negative bacteria when exposed to white light-emitting diode (LED) irradiation. The photoexcited Lys-Au NCs/RB showed significantly higher antibacterial activity than photoexcited Lys-Au NCs or RB alone. The synergistic effect is a result of the combination of Lys (an antibacterial protein) and enhanced 1O2 generation related to resonance energy transfer (RET) in the Au NCs/RB conjugate. Photoexcited Lys-Au NCs/RB increased the effects of aPDT in a dose- and time-dependent manner. Furthermore, the photoexcited Lys-Au NCs/RB successfully decreased Streptococcus mutans biofilm formation. However, in contrast, it did not have a negative effect on the proliferation, adhesion, or spread of mammalian cells, indicating low cytotoxicity. Lys-Au NCs/RB is a novel photosensitizer with low cytotoxicity that is capable of bacterial inactivation and the suppression of biofilm formation, and could help to improve dental treatments in the future.
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Affiliation(s)
- Ichie Okamoto
- Department
of Periodontology and Endodontology, Faculty of Dental Medicine, Hokkaido University, N13 W7, Kita-ku, Sapporo, Hokkaido 060-8586, Japan
| | - Hirofumi Miyaji
- Department
of Periodontology and Endodontology, Faculty of Dental Medicine, Hokkaido University, N13 W7, Kita-ku, Sapporo, Hokkaido 060-8586, Japan
| | - Saori Miyata
- Department
of Periodontology and Endodontology, Faculty of Dental Medicine, Hokkaido University, N13 W7, Kita-ku, Sapporo, Hokkaido 060-8586, Japan
| | - Kanako Shitomi
- Division
of Periodontology and Endodontology, School of Dentistry, Health Sciences University of Hokkaido, 1757 Kanazawa, Tobetsu-cho, Ishikari-gun, Hokkaido 061-0293, Japan
| | - Tsutomu Sugaya
- Department
of Periodontology and Endodontology, Faculty of Dental Medicine, Hokkaido University, N13 W7, Kita-ku, Sapporo, Hokkaido 060-8586, Japan
| | - Natsumi Ushijima
- Support
Section for Education and Research, Faculty of Dental Medicine, Hokkaido University,
N13 W7, Kita-ku, Sapporo, Hokkaido 060-8586, Japan
| | - Tsukasa Akasaka
- Department
of Biomedical Materials and Engineering, Faculty of Dental Medicine, Hokkaido University, N13 W7, Kita-ku, Sapporo, Hokkaido 060-8586, Japan
| | - Satoshi Enya
- Department
of Chemistry and Materials Engineering, Faculty of Chemistry, Materials
and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita-shi, Osaka 564-8689, Japan
| | - Satoshi Saita
- Department
of Chemistry and Materials Engineering, Faculty of Chemistry, Materials
and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita-shi, Osaka 564-8689, Japan
| | - Hideya Kawasaki
- Department
of Chemistry and Materials Engineering, Faculty of Chemistry, Materials
and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita-shi, Osaka 564-8689, Japan
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124
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Arshad R, Pal K, Sabir F, Rahdar A, Bilal M, Shahnaz G, Kyzas GZ. A review of the nanomaterials use for the diagnosis and therapy of salmonella typhi. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.129928] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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125
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Sarca AD, Sardo L, Fukuda H, Matsui H, Shirakawa K, Horikawa K, Takaori-Kondo A, Izumi T. FRET-Based Detection and Quantification of HIV-1 Virion Maturation. Front Microbiol 2021; 12:647452. [PMID: 33767685 PMCID: PMC7985248 DOI: 10.3389/fmicb.2021.647452] [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: 12/29/2020] [Accepted: 01/18/2021] [Indexed: 01/27/2023] Open
Abstract
HIV-1 infectivity is achieved through virion maturation. Virus particles undergo structural changes via cleavage of the Gag polyprotein mediated by the viral protease, causing the transition from an uninfectious to an infectious status. The majority of proviruses in people living with HIV-1 treated with combination antiretroviral therapy are defective with large internal deletions. Defective proviral DNA frequently preserves intact sequences capable of expressing viral structural proteins to form virus-like particles whose maturation status is an important factor for chronic antigen-mediated immune stimulation and inflammation. Thus, novel methods to study the maturation capability of defective virus particles are needed to characterize their immunogenicity. To build a quantitative tool to study virion maturation in vitro, we developed a novel single virion visualization technique based on fluorescence resonance energy transfer (FRET). We inserted an optimized intramolecular CFP-YPF FRET donor-acceptor pair bridged with an HIV-1 protease cleavage sequence between the Gag MA-CA domains. This system allowed us to microscopically distinguish mature and immature virions via their FRET signal when the FRET donor and acceptor proteins were separated by the viral protease during maturation. We found that approximately 80% of the FRET labeled virus particles were mature with equivalent infectivity to wild type. The proportion of immature virions was increased by treatment of virus producer cells with a protease inhibitor in a dose-dependent manner, which corresponded to a relative decrease in infectivity. Potential areas of application for this tool are assessing maturation efficiency in different cell type settings of intact or deficient proviral DNA integrated cells. We believe that this FRET-based single-virion imaging platform will facilitate estimating the impact on the immune system of both extracellular intact and defective viruses by quantifying the Gag maturation status.
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Affiliation(s)
- Anamaria D Sarca
- Department of Hematology and Oncology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Luca Sardo
- Department of Biological Sciences, University of the Sciences, Philadelphia, PA, United States
| | - Hirofumi Fukuda
- Department of Hematology and Oncology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Hiroyuki Matsui
- Department of Hematology and Oncology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Kotaro Shirakawa
- Department of Hematology and Oncology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Kazuki Horikawa
- Department of Optical Imaging, Advanced Research Promotion Center, Tokushima University, Tokushima, Japan
| | - Akifumi Takaori-Kondo
- Department of Hematology and Oncology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Taisuke Izumi
- Department of Hematology and Oncology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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126
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Rivas S, Hanif K, Chakouri N, Ben-Johny M. Probing ion channel macromolecular interactions using fluorescence resonance energy transfer. Methods Enzymol 2021; 653:319-347. [PMID: 34099178 DOI: 10.1016/bs.mie.2021.01.047] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Ion channels are macromolecular complexes whose functions are exquisitely tuned by interacting proteins. Fluorescence resonance energy transfer (FRET) is a powerful methodology that is adept at quantifying ion channel protein-protein interactions in living cells. For FRET experiments, the interacting partners are tagged with appropriate donor and acceptor fluorescent proteins. If the fluorescently-labeled molecules are in close proximity, then photoexcitation of the donor results in non-radiative energy transfer to the acceptor, and subsequent fluorescence emission of the acceptor. The stoichiometry of ion channel interactions and their relative binding affinities can be deduced by quantifying both the FRET efficiency and the total number of donors and acceptors in a given cell. In this chapter, we discuss general considerations for FRET analysis of biological interactions, various strategies for estimating FRET efficiencies, and detailed protocols for construction of binding curves and determination of stoichiometry. We focus on implementation of FRET assays using a flow cytometer given its amenability for high-throughput data acquisition, enhanced accessibility, and robust analysis. This versatile methodology permits mechanistic dissection of dynamic changes in ion channel interactions.
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Affiliation(s)
- Sharen Rivas
- Department of Physiology and Cellular Biophysics, Columbia University, New York, NY, United States
| | | | - Nourdine Chakouri
- Department of Physiology and Cellular Biophysics, Columbia University, New York, NY, United States
| | - Manu Ben-Johny
- Department of Physiology and Cellular Biophysics, Columbia University, New York, NY, United States.
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127
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Parperis C, Wallace MI. Single-molecule imaging of pore-forming toxin dynamics in droplet interface bilayers. Methods Enzymol 2021; 649:431-459. [PMID: 33712195 DOI: 10.1016/bs.mie.2021.01.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Single-channel recording from pore-forming toxins (PFTs) provides a clear and direct molecular readout of toxin action. However to complete any mechanistic understanding of PFT behavior, this functional kinetic readout must be linked to the underlying changes in toxin structure, binding, conformation, or stoichiometry. Here we review how single-molecule imaging methods might be used to further our understanding of PFTs, and provide detailed practical guidance on the use of droplet interface bilayers as a method capable of examining both single-molecule fluorescence and single-channel electrical signals from PFTs.
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Affiliation(s)
- Christopher Parperis
- Department of Chemistry, Britannia House, King's College London, London, United Kingdom
| | - Mark I Wallace
- Department of Chemistry, Britannia House, King's College London, London, United Kingdom.
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128
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Ghezzi M, Pescina S, Padula C, Santi P, Del Favero E, Cantù L, Nicoli S. Polymeric micelles in drug delivery: An insight of the techniques for their characterization and assessment in biorelevant conditions. J Control Release 2021; 332:312-336. [PMID: 33652113 DOI: 10.1016/j.jconrel.2021.02.031] [Citation(s) in RCA: 374] [Impact Index Per Article: 124.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 02/23/2021] [Accepted: 02/25/2021] [Indexed: 12/16/2022]
Abstract
Polymeric micelles, i.e. aggregation colloids formed in solution by self-assembling of amphiphilic polymers, represent an innovative tool to overcome several issues related to drug administration, from the low water-solubility to the poor drug permeability across biological barriers. With respect to other nanocarriers, polymeric micelles generally display smaller size, easier preparation and sterilization processes, and good solubilization properties, unfortunately associated with a lower stability in biological fluids and a more complicated characterization. Particularly challenging is the study of their interaction with the biological environment, essential to predict the real in vivo behavior after administration. In this review, after a general presentation on micelles features and properties, different characterization techniques are discussed, from the ones used for the determination of micelles basic characteristics (critical micellar concentration, size, surface charge, morphology) to the more complex approaches used to figure out micelles kinetic stability, drug release and behavior in the presence of biological substrates (fluids, cells and tissues). The techniques presented (such as dynamic light scattering, AFM, cryo-TEM, X-ray scattering, FRET, symmetrical flow field-flow fractionation (AF4) and density ultracentrifugation), each one with their own advantages and limitations, can be combined to achieve a deeper comprehension of polymeric micelles in vivo behavior. The set-up and validation of adequate methods for micelles description represent the essential starting point for their development and clinical success.
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Affiliation(s)
- M Ghezzi
- ADDRes Lab, Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - S Pescina
- ADDRes Lab, Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - C Padula
- ADDRes Lab, Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - P Santi
- ADDRes Lab, Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - E Del Favero
- Department of Medical Biotechnologies and Translational Medicine, LITA, University of Milan, Segrate, Italy
| | - L Cantù
- Department of Medical Biotechnologies and Translational Medicine, LITA, University of Milan, Segrate, Italy
| | - S Nicoli
- ADDRes Lab, Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy.
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129
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Clark JC, Neagoe RAI, Zuidscherwoude M, Kavanagh DM, Slater A, Martin EM, Soave M, Stegner D, Nieswandt B, Poulter NS, Hummert J, Herten DP, Tomlinson MG, Hill SJ, Watson SP. Evidence that GPVI is Expressed as a Mixture of Monomers and Dimers, and that the D2 Domain is not Essential for GPVI Activation. Thromb Haemost 2021; 121:1435-1447. [PMID: 33638140 DOI: 10.1055/a-1401-5014] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Collagen has been proposed to bind to a unique epitope in dimeric glycoprotein VI (GPVI) and the number of GPVI dimers has been reported to increase upon platelet activation. However, in contrast, the crystal structure of GPVI in complex with collagen-related peptide (CRP) showed binding distinct from the site of dimerization. Further fibrinogen has been reported to bind to monomeric but not dimeric GPVI. In the present study, we have used the advanced fluorescence microscopy techniques of single-molecule microscopy, fluorescence correlation spectroscopy (FCS) and bioluminescence resonance energy transfer (BRET), and mutagenesis studies in a transfected cell line model to show that GPVI is expressed as a mixture of monomers and dimers and that dimerization through the D2 domain is not critical for activation. As many of these techniques cannot be applied to platelets to resolve this issue, due to the high density of GPVI and its anucleate nature, we used Förster resonance energy transfer (FRET) to show that endogenous GPVI is at least partially expressed as a dimer on resting and activated platelet membranes. We propose that GPVI may be expressed as a monomer on the cell surface and it forms dimers in the membrane through diffusion, giving rise to a mixture of monomers and dimers. We speculate that the formation of dimers facilitates ligand binding through avidity.
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Affiliation(s)
- Joanne C Clark
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom.,Centre of Membrane Proteins and Receptors, The Universities of Birmingham and Nottingham, The Midlands, United Kingdom
| | - Raluca A I Neagoe
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom.,Institute of Experimental Biomedicine I, University Hospital and Rudolf Virchow Center, University of Wurzburg, Wurzburg, Germany
| | - Malou Zuidscherwoude
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom.,Centre of Membrane Proteins and Receptors, The Universities of Birmingham and Nottingham, The Midlands, United Kingdom
| | - Deirdre M Kavanagh
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom.,Centre of Membrane Proteins and Receptors, The Universities of Birmingham and Nottingham, The Midlands, United Kingdom
| | - Alexandre Slater
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Eleyna M Martin
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Mark Soave
- Centre of Membrane Proteins and Receptors, The Universities of Birmingham and Nottingham, The Midlands, United Kingdom.,Division of Physiology, Pharmacology and Neuroscience, School of Life Sciences, University of Nottingham, Queen's Medical Centre, Nottingham, United Kingdom
| | - David Stegner
- Institute of Experimental Biomedicine I, University Hospital and Rudolf Virchow Center, University of Wurzburg, Wurzburg, Germany
| | - Bernhard Nieswandt
- Institute of Experimental Biomedicine I, University Hospital and Rudolf Virchow Center, University of Wurzburg, Wurzburg, Germany
| | - Natalie S Poulter
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom.,Centre of Membrane Proteins and Receptors, The Universities of Birmingham and Nottingham, The Midlands, United Kingdom
| | - Johan Hummert
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom.,Centre of Membrane Proteins and Receptors, The Universities of Birmingham and Nottingham, The Midlands, United Kingdom.,Department for Physical Chemistry, Heidelberg University, Heidelberg, Germany
| | - Dirk-Peter Herten
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom.,Centre of Membrane Proteins and Receptors, The Universities of Birmingham and Nottingham, The Midlands, United Kingdom.,Department for Physical Chemistry, Heidelberg University, Heidelberg, Germany
| | - Michael G Tomlinson
- Centre of Membrane Proteins and Receptors, The Universities of Birmingham and Nottingham, The Midlands, United Kingdom.,School of Biosciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom
| | - Stephen J Hill
- Centre of Membrane Proteins and Receptors, The Universities of Birmingham and Nottingham, The Midlands, United Kingdom.,Division of Physiology, Pharmacology and Neuroscience, School of Life Sciences, University of Nottingham, Queen's Medical Centre, Nottingham, United Kingdom
| | - Steve P Watson
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Edgbaston, Birmingham, United Kingdom.,Centre of Membrane Proteins and Receptors, The Universities of Birmingham and Nottingham, The Midlands, United Kingdom
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130
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Energy Transfer Systems for In Vivo Tracking. Methods Mol Biol 2021. [PMID: 32112378 DOI: 10.1007/978-1-0716-0364-2_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
With recent advances, fluorescent imaging has gained momentum as an important tool for in vivo imaging. FRET systems consist of molecules that absorb in the near-infrared region which are efficient candidates for in vivo imaging, basic research, and clinical applications. Nontoxic, photostable fluorophores, such as fluorescent proteins and dyes, can successfully be used to visualize spatial and temporal dynamics of living cells. Selected cells to be injected are first tagged with the FRET-based biosensor and then injected to the living animal. Then, these foreign cells in the host body can be visualized under fluorescence microscope via excitation of the fluorophores at the correct wavelength.
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131
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Hamza AO, Viscomi FN, Bouillard JSG, Adawi AM. Förster Resonance Energy Transfer and the Local Optical Density of States in Plasmonic Nanogaps. J Phys Chem Lett 2021; 12:1507-1513. [PMID: 33534597 DOI: 10.1021/acs.jpclett.0c03702] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Förster resonance energy transfer (FRET) is a fundamental phenomenon in photosynthesis and is of increasing importance for the development and enhancement of a wide range of optoelectronic devices, including color-tuning LEDs and lasers, light harvesting, sensing systems, and quantum computing. Despite its importance, fundamental questions remain unanswered on the FRET rate dependency on the local density of optical states (LDOS). In this work, we investigate this directly, both theoretically and experimentally, using 30 nm plasmonic nanogaps formed between a silver nanoparticle and an extended silver film, in which the LDOS can be controlled using the size of the silver nanoparticle. Experimentally, uranin-rhodamine 6G donor-acceptor pairs coupled to such nanogaps yielded FRET rate enhancements of 3.6 times. This, combined with a 5-fold enhancement in the emission rate of the acceptor, resulted in an overall 14-fold enhancement in the acceptor's emission intensity. By tuning the nanoparticle size, we also show that the FRET rate in those systems is linearly dependent on the LDOS, a result which is directly supported by our finite difference time domain (FDTD) calculations. Our results provide a simple but powerful method to control FRET rate via a direct LDOS modification.
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Affiliation(s)
- Abdullah O Hamza
- Department of Physics and Mathematics, University of Hull, Cottingham Road, HU6 7RX Hull, U.K
- G. W. Gray Centre for Advanced Materials, University of Hull, Cottingham Road, HU6 7RX Hull, U.K
- Department of Physics, College of Science, Salahaddin University, Erbil, Iraq
| | - Francesco N Viscomi
- Department of Physics and Mathematics, University of Hull, Cottingham Road, HU6 7RX Hull, U.K
- G. W. Gray Centre for Advanced Materials, University of Hull, Cottingham Road, HU6 7RX Hull, U.K
| | - Jean-Sebastien G Bouillard
- Department of Physics and Mathematics, University of Hull, Cottingham Road, HU6 7RX Hull, U.K
- G. W. Gray Centre for Advanced Materials, University of Hull, Cottingham Road, HU6 7RX Hull, U.K
| | - Ali M Adawi
- Department of Physics and Mathematics, University of Hull, Cottingham Road, HU6 7RX Hull, U.K
- G. W. Gray Centre for Advanced Materials, University of Hull, Cottingham Road, HU6 7RX Hull, U.K
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132
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Lumkwana D, Engelbrecht L, Loos B. Monitoring autophagy using super-resolution structured illumination and direct stochastic optical reconstruction microscopy. Methods Cell Biol 2021; 165:139-152. [PMID: 34311863 DOI: 10.1016/bs.mcb.2020.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Autophagy is a major protein degradation pathway responsible for the removal of primarily long-lived and misfolded proteins, contributing to cellular homeostasis. Autophagy dysfunction has been associated with the onset of various human pathologies. Visualizing key proteins that govern autophagy pathway activity, the molecular machinery and cargo is essential to elucidate roles and mechanisms of autophagy function. Although multiple fluorescence-based microscopy approaches exist to assess autophagy, the limit of resolution associated with light microscopy makes precise intracellular protein localization, interaction and molecular distribution challenging. Here we describe a detailed protocol for both super-resolution structured illumination microscopy (SR-SIM) as well as direct stochastic optical reconstruction microscopy (dSTORM) for the visualization of key proteins associated with the autophagy molecular machinery and cargo. The presented method enables to achieve increased resolving power to assess localization and molecular density profiles, typically not achievable with standard confocal or wide field fluorescence microcopy.
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Affiliation(s)
- Dumisile Lumkwana
- Microscopy and Imaging Translational Technology Platform, Cancer Research UK, University College London, London, United Kingdom
| | - Lize Engelbrecht
- Central Analytical Facility, Fluorescence Microscopy Unit, Stellenbosch University, South Africa
| | - Ben Loos
- Department of Physiological Sciences, Stellenbosch University, South Africa.
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133
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Ling X, Han W, Jiang X, Chen X, Rodriguez M, Zhu P, Wu T, Lin W. Point-source burst of coordination polymer nanoparticles for tri-modality cancer therapy. Biomaterials 2021; 270:120690. [PMID: 33561626 DOI: 10.1016/j.biomaterials.2021.120690] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 01/12/2021] [Accepted: 01/21/2021] [Indexed: 12/16/2022]
Abstract
Cancer immunotherapy, particularly the inhibition of immune checkpoints with neutralizing antibodies, has revolutionized the treatment of some cancer patients. However, immune checkpoint blockade has not provided survival benefits to most patients with colorectal and ovarian cancers. This work reports the design of acid-sensitive core-shell nanoscale coordination polymer particles (NCP) comprising a carboplatin prodrug and an siRNA against PD-L1 (siPD-L1) in the core and digitoxin on the shell for tri-modality cancer therapy. Upon cellular uptake, NCP particles rapidly burst in acidic organelles to release carboplatin for apoptosis, digitoxin for inducing immunogenicity, and siPD-L1 for PD-L1 knockdown. With long blood circulation and high tumor accumulation, NCP particles efficiently suppress the growth and metastasis of syngeneic cancers through reactivating innate and adaptive immune responses. NCP particles thus provide a promising platform to synergistically combine chemotherapy and immunotherapy for the treatment of advanced and aggressive cancers.
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Affiliation(s)
- Xiang Ling
- Department of Chemistry, The University of Chicago, Chicago, IL, 60637, United States
| | - Wenbo Han
- Department of Chemistry, The University of Chicago, Chicago, IL, 60637, United States
| | - Xiaomin Jiang
- Department of Chemistry, The University of Chicago, Chicago, IL, 60637, United States
| | - Xing Chen
- Department of Pharmaceutics, School of Pharmacy, Fudan University, Key Laboratory of Smart Drug Delivery, Ministry of Education, Shanghai, 201203, China
| | - Megan Rodriguez
- Department of Chemistry, The University of Chicago, Chicago, IL, 60637, United States
| | - Pingping Zhu
- Department of Chemistry, The University of Chicago, Chicago, IL, 60637, United States
| | - Tong Wu
- Department of Chemistry, The University of Chicago, Chicago, IL, 60637, United States
| | - Wenbin Lin
- Department of Chemistry, The University of Chicago, Chicago, IL, 60637, United States; Department of Radiation and Cellular Oncology and Ludwig Center for Metastasis Research, The University of Chicago, Chicago, IL, 60637, United States.
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134
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Schueder F, Lara‐Gutiérrez J, Haas D, Beckwith KS, Yin P, Ellenberg J, Jungmann R. Superaufgelöste Erkennung räumlicher Nähe mit Proximity‐PAINT. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202009031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Florian Schueder
- Faculty of Physics and Center for Nanoscience LMU Munich Geschwister-Scholl-Platz 1 80539 Munich Deutschland
- Max Planck Institute of Biochemistry Am Klopferspitz 18 82152 Martinsried Germany
| | - Juanita Lara‐Gutiérrez
- Max Planck Institute of Biochemistry Am Klopferspitz 18 82152 Martinsried Germany
- Department of Systems Biology and Wyss Institute for Biologically Inspired Engineering Harvard Medical School 3 Blackfan Circle Boston MA 02115 USA
| | - Daniel Haas
- Max Planck Institute of Biochemistry Am Klopferspitz 18 82152 Martinsried Germany
| | - Kai Sandvold Beckwith
- Cell Biology and Biophysics Unit European Molecular Biology Laboratory (EMBL) Meyerhofstraße 1 69117 Heidelberg Germany
| | - Peng Yin
- Department of Systems Biology and Wyss Institute for Biologically Inspired Engineering Harvard Medical School 3 Blackfan Circle Boston MA 02115 USA
| | - Jan Ellenberg
- Cell Biology and Biophysics Unit European Molecular Biology Laboratory (EMBL) Meyerhofstraße 1 69117 Heidelberg Germany
| | - Ralf Jungmann
- Faculty of Physics and Center for Nanoscience LMU Munich Geschwister-Scholl-Platz 1 80539 Munich Deutschland
- Max Planck Institute of Biochemistry Am Klopferspitz 18 82152 Martinsried Germany
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135
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Schueder F, Lara‐Gutiérrez J, Haas D, Beckwith KS, Yin P, Ellenberg J, Jungmann R. Super-Resolution Spatial Proximity Detection with Proximity-PAINT. Angew Chem Int Ed Engl 2021; 60:716-720. [PMID: 32936507 PMCID: PMC7839522 DOI: 10.1002/anie.202009031] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/11/2020] [Indexed: 12/21/2022]
Abstract
Visualizing the functional interactions of biomolecules such as proteins and nucleic acids is key to understanding cellular life on the molecular scale. Spatial proximity is often used as a proxy for the direct interaction of biomolecules. However, current techniques to visualize spatial proximity are either limited by spatial resolution, dynamic range, or lack of single-molecule sensitivity. Here, we introduce Proximity-PAINT (pPAINT), a variation of the super-resolution microscopy technique DNA-PAINT. pPAINT uses a split-docking-site configuration to detect spatial proximity with high sensitivity, low false-positive rates, and tunable detection distances. We benchmark and optimize pPAINT using designer DNA nanostructures and demonstrate its cellular applicability by visualizing the spatial proximity of alpha- and beta-tubulin in microtubules using super-resolution detection.
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Affiliation(s)
- Florian Schueder
- Faculty of Physics and Center for NanoscienceLMU MunichGeschwister-Scholl-Platz 180539MunichGermany
- Max Planck Institute of BiochemistryAm Klopferspitz 1882152MartinsriedGermany
| | - Juanita Lara‐Gutiérrez
- Max Planck Institute of BiochemistryAm Klopferspitz 1882152MartinsriedGermany
- Department of Systems Biology and Wyss Institute for Biologically Inspired EngineeringHarvard Medical School3 Blackfan CircleBostonMA02115USA
| | - Daniel Haas
- Max Planck Institute of BiochemistryAm Klopferspitz 1882152MartinsriedGermany
| | - Kai Sandvold Beckwith
- Cell Biology and Biophysics UnitEuropean Molecular Biology Laboratory (EMBL)Meyerhofstraße 169117HeidelbergGermany
| | - Peng Yin
- Department of Systems Biology and Wyss Institute for Biologically Inspired EngineeringHarvard Medical School3 Blackfan CircleBostonMA02115USA
| | - Jan Ellenberg
- Cell Biology and Biophysics UnitEuropean Molecular Biology Laboratory (EMBL)Meyerhofstraße 169117HeidelbergGermany
| | - Ralf Jungmann
- Faculty of Physics and Center for NanoscienceLMU MunichGeschwister-Scholl-Platz 180539MunichGermany
- Max Planck Institute of BiochemistryAm Klopferspitz 1882152MartinsriedGermany
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136
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Bhuin S, Halder S, Saha SK, Chakravarty M. Binding interactions and FRET between bovine serum albumin and various phenothiazine-/anthracene-based dyes: a structure-property relationship. RSC Adv 2021; 11:1679-1693. [PMID: 35424090 PMCID: PMC8693680 DOI: 10.1039/d0ra09580j] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 12/15/2020] [Indexed: 12/24/2022] Open
Abstract
The present study demonstrates binding interactions and Förster resonance energy transfer (FRET) between bovine serum albumin (BSA) and a series of structurally and electronically diverse phenothiazine (PTZ) and anthracene (ANT) dyes. Upon selective excitation of tryptophan (Trp) residues of BSA, radiationless energy transfer to a dye takes place, resulting in fluorescence quenching of the former. Fluorescence quenching mechanisms, FRET parameters, possible locations, and binding constants of dyes with the BSA have been examined to deduce a structure–property relationship. The mechanism of quenching is apparently static in nature. PTZ dyes with heteroatoms and a pentyl tail (C5-PTZ) attached to them were found to have a stronger binding affinity with BSA as compared to ANT dyes. Stronger binding affinities of C5-PTZ dyes with BSA result in greater energy transfer efficiencies (ET). A dye with a strong electron-withdrawing group present in it has shown better energy accepting capability. A FRET study with dicyanoaniline (DCA) analogs of PTZ and ANT dyes (C5-PTZDCA and ANTDCA, respectively) revealed that ET depends on electronic and structural factors of molecules. An almost orthogonal geometry between ANT and DCA moieties (∼79°) in ANTDCA induces the greater extent of electron transfer from ANT to DCA, showing a higher ET for this dye as compared to C5-PTZDCA in which the torsion angle is only ∼38°. Further, the observed facts have been validated by experimentally determined bandgaps (using cyclic voltammetry experiments) for all the dyes. Thus, the hydrophobic character and the presence of interactive substituents along with the electron-accepting abilities majorly control the FRET for such dyes with BSA. The present study demonstrates binding interactions and Förster resonance energy transfer (FRET) between bovine serum albumin (BSA) and a series of structurally and electronically diverse phenothiazine (PTZ) and anthracene (ANT) dyes.![]()
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Affiliation(s)
- Shouvik Bhuin
- Department of Chemistry, Birla Institute of Technology and Sciences-Pilani, Hyderabad Campuses Hyderabad-500078 Telangana India
| | - Sayantan Halder
- Department of Chemistry, Birla Institute of Technology and Sciences-Pilani, Hyderabad Campuses Hyderabad-500078 Telangana India
| | - Subit Kumar Saha
- Department of Chemistry, Birla Institute of Technology and Sciences-Pilani, Hyderabad Campuses Hyderabad-500078 Telangana India
| | - Manab Chakravarty
- Department of Chemistry, Birla Institute of Technology and Sciences-Pilani, Hyderabad Campuses Hyderabad-500078 Telangana India
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137
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Maresh ME, Salazar-Chaparro AF, Trader DJ. Methods for the discovery of small molecules to monitor and perturb the activity of the human proteasome. Future Med Chem 2021; 13:99-116. [PMID: 33275045 PMCID: PMC7857359 DOI: 10.4155/fmc-2020-0288] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 10/14/2020] [Indexed: 12/12/2022] Open
Abstract
Regulating protein production and degradation is critical to maintaining cellular homeostasis. The proteasome is a key player in keeping proteins at the proper levels. However, proteasome activity can be altered in certain disease states, such as blood cancers and neurodegenerative diseases. Cancers often exhibit enhanced proteasomal activity, as protein synthesis is increased in these cells compared with normal cells. Conversely, neurodegenerative diseases are characterized by protein accumulation, leading to reduced proteasome activity. As a result, the proteasome has emerged as a target for therapeutic intervention. The potential of the proteasome as a therapeutic target has come from studies involving chemical stimulators and inhibitors, and the development of a suite of assays and probes that can be used to monitor proteasome activity with purified enzyme and in live cells.
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Affiliation(s)
- Marianne E Maresh
- Department of Medicinal Chemistry & Molecular Pharmacology, Purdue University, 575 West Stadium Avenue, West Lafayette, IN 47907, USA
| | - Andres F Salazar-Chaparro
- Department of Medicinal Chemistry & Molecular Pharmacology, Purdue University, 575 West Stadium Avenue, West Lafayette, IN 47907, USA
| | - Darci J Trader
- Department of Medicinal Chemistry & Molecular Pharmacology, Purdue University, 575 West Stadium Avenue, West Lafayette, IN 47907, USA
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138
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Carvalho AM, Soares da Costa D, Paulo PMR, Reis RL, Pashkuleva I. Co-localization and crosstalk between CD44 and RHAMM depend on hyaluronan presentation. Acta Biomater 2021; 119:114-124. [PMID: 33091625 DOI: 10.1016/j.actbio.2020.10.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 10/09/2020] [Accepted: 10/13/2020] [Indexed: 01/04/2023]
Abstract
CD44 and the receptor for hyaluronic acid-mediated motility (RHAMM) are the main hyaluronan (HA) receptors. They are commonly overexpressed in different cancers activating signaling pathways related to tumor progression, metastasis and chemoresistance. Besides their involvement in signal transduction via interaction with HA, currently, there is a little information about the possible crosstalk between CD44 and RHAMM and the role of HA in this process. In the present work, we used immunocytochemistry combined with Förster resonance energy transfer (FRET) microscopy and co-immunoprecipitation to elucidate the involvement of HA in CD44 and RHAMM expression, co-localization and crosstalk. We studied breast cancer cells lines with different degrees of invasiveness and expression of these receptors in the absence of exogenous HA and compared the data with the results obtained for cultures supplemented with either soluble HA or seeded on substrates with end-on immobilized HA. Our results demonstrated that cells response depends on the HA presentation: CD44/RHAMM complexation was upregulated in all cell lines upon interaction with immobilized HA, but not with its soluble form. Moreover, the results showed that the expression of both CD44 and RHAMM is regulated via interactions with HA indicating cell-specific feedback loop(s) in the signaling cascade.
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Affiliation(s)
- Ana M Carvalho
- 3B's Research Group - Biomaterials, Biodegradable and Biomimetics, Avepark - Parque de Ciência e Tecnologia Zona Industrial da Gandra 4805-017 Barco GMR, Portugal; ICVS/3B's - PT Government Associate Laboratory, University of Minho, Portugal.
| | - Diana Soares da Costa
- 3B's Research Group - Biomaterials, Biodegradable and Biomimetics, Avepark - Parque de Ciência e Tecnologia Zona Industrial da Gandra 4805-017 Barco GMR, Portugal; ICVS/3B's - PT Government Associate Laboratory, University of Minho, Portugal
| | - Pedro M R Paulo
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - Rui L Reis
- 3B's Research Group - Biomaterials, Biodegradable and Biomimetics, Avepark - Parque de Ciência e Tecnologia Zona Industrial da Gandra 4805-017 Barco GMR, Portugal; ICVS/3B's - PT Government Associate Laboratory, University of Minho, Portugal
| | - Iva Pashkuleva
- 3B's Research Group - Biomaterials, Biodegradable and Biomimetics, Avepark - Parque de Ciência e Tecnologia Zona Industrial da Gandra 4805-017 Barco GMR, Portugal; ICVS/3B's - PT Government Associate Laboratory, University of Minho, Portugal.
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139
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Cheng MHY, Mo Y, Zheng G. Nano versus Molecular: Optical Imaging Approaches to Detect and Monitor Tumor Hypoxia. Adv Healthc Mater 2021; 10:e2001549. [PMID: 33241672 DOI: 10.1002/adhm.202001549] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/21/2020] [Indexed: 12/18/2022]
Abstract
Hypoxia is a ubiquitous feature of solid tumors, which plays a key role in tumor angiogenesis and resistance development. Conventional hypoxia detection methods lack continuous functional detection and are generally less suitable for dynamic hypoxia measurement. Optical sensors hereby provide a unique opportunity to noninvasively image hypoxia with high spatiotemporal resolution and enable real-time detection. Therefore, these approaches can provide a valuable tool for personalized treatment planning against this hallmark of aggressive cancers. Many small optical molecular probes can enable analyte triggered response and their photophysical properties can also be fine-tuned through structural modification. On the other hand, optical nanoprobes can acquire unique intrinsic optical properties through nanoconfinement as well as enable simultaneous multimodal imaging and drug delivery. Furthermore, nanoprobes provide biological advantages such as improving bioavailability and systemic delivery of the sensor to enhance bioavailability. This review provides a comprehensive overview of the physical, chemical, and biological analytes for cancer hypoxia detection and focuses on discussing the latest nano- and molecular developments in various optical imaging approaches (fluorescence, phosphorescence, and photoacoustic) in vivo. Finally, this review concludes with a perspective toward the potentials of these optical imaging approaches in hypoxia detection and the challenges with molecular and nanotechnology design strategies.
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Affiliation(s)
- Miffy Hok Yan Cheng
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5–354 Toronto Ontario M5G 1L7 Canada
| | - Yulin Mo
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5–354 Toronto Ontario M5G 1L7 Canada
- Institute of Medical Science University of Toronto 101 College Street Toronto Ontario M5G 1L7 Canada
| | - Gang Zheng
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5–354 Toronto Ontario M5G 1L7 Canada
- Institute of Medical Science University of Toronto 101 College Street Toronto Ontario M5G 1L7 Canada
- Department of Medical Biophysics University of Toronto 101 College Street Toronto Ontario M5G 1L7 Canada
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140
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Mo W, Patel NJ, Chen Y, Pandey R, Sunar U. Mapping fluorescence resonance energy transfer parameters of a bifunctional agent using time-domain fluorescence diffuse optical tomography. JOURNAL OF BIOPHOTONICS 2021; 14:e202000291. [PMID: 33025728 DOI: 10.1002/jbio.202000291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 09/22/2020] [Accepted: 09/25/2020] [Indexed: 06/11/2023]
Abstract
We present a method to map fluorescence resonance energy transfer (FRET) parameters of a bifunctional photodynamic therapy agent, (2-[1-hexyloxyethyl]-2-devinyl pyropheophorbide-a)-cyanine dye (HPPH-CD) conjugate, which consists of a photosensitizer (HPPH) and a fluorescent agent CD. We utilized time-domain fluorescence diffuse optical tomography, the normalized Born ratio model in the Fourier-domain, and an iterative algorithm to map depth-resolved spatial heterogeneities of FRET parameters. Our results exhibited depth-resolved changes of fluorophore's lifetime and the distance maps due to FRET between HPPH and CD. Our model suggests a potential approach of using FRET parameters to monitor efficacies of multifunctional photodynamic therapy agents in deep tissue.
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Affiliation(s)
- Weirong Mo
- Topcon Healthcare Solutions, San Jose, California, USA
| | - Nayan J Patel
- Department of Cell Stress Biology and PDT Center, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Yihui Chen
- Department of Cell Stress Biology and PDT Center, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Ravindra Pandey
- Department of Cell Stress Biology and PDT Center, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Ulas Sunar
- Department of Biomedical Engineering, Wright State University, Dayton, Ohio, USA
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141
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Gao D, Barber PR, Chacko JV, Kader Sagar MA, Rueden CT, Grislis AR, Hiner MC, Eliceiri KW. FLIMJ: An open-source ImageJ toolkit for fluorescence lifetime image data analysis. PLoS One 2020; 15:e0238327. [PMID: 33378370 PMCID: PMC7773231 DOI: 10.1371/journal.pone.0238327] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 12/14/2020] [Indexed: 12/11/2022] Open
Abstract
In the field of fluorescence microscopy, there is continued demand for dynamic technologies that can exploit the complete information from every pixel of an image. One imaging technique with proven ability for yielding additional information from fluorescence imaging is Fluorescence Lifetime Imaging Microscopy (FLIM). FLIM allows for the measurement of how long a fluorophore stays in an excited energy state, and this measurement is affected by changes in its chemical microenvironment, such as proximity to other fluorophores, pH, and hydrophobic regions. This ability to provide information about the microenvironment has made FLIM a powerful tool for cellular imaging studies ranging from metabolic measurement to measuring distances between proteins. The increased use of FLIM has necessitated the development of computational tools for integrating FLIM analysis with image and data processing. To address this need, we have created FLIMJ, an ImageJ plugin and toolkit that allows for easy use and development of extensible image analysis workflows with FLIM data. Built on the FLIMLib decay curve fitting library and the ImageJ Ops framework, FLIMJ offers FLIM fitting routines with seamless integration with many other ImageJ components, and the ability to be extended to create complex FLIM analysis workflows. Building on ImageJ Ops also enables FLIMJ's routines to be used with Jupyter notebooks and integrate naturally with science-friendly programming in, e.g., Python and Groovy. We show the extensibility of FLIMJ in two analysis scenarios: lifetime-based image segmentation and image colocalization. We also validate the fitting routines by comparing them against industry FLIM analysis standards.
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Affiliation(s)
- Dasong Gao
- Laboratory for Optical and Computational Instrumentation, Center for Quantitative Cell Imaging, University of Wisconsin, Madison, WI, United States of America
| | - Paul R. Barber
- UCL Cancer Institute, Paul O’Gorman Building, University College London, London, United Kingdom
| | - Jenu V. Chacko
- Laboratory for Optical and Computational Instrumentation, Center for Quantitative Cell Imaging, University of Wisconsin, Madison, WI, United States of America
| | - Md. Abdul Kader Sagar
- Laboratory for Optical and Computational Instrumentation, Center for Quantitative Cell Imaging, University of Wisconsin, Madison, WI, United States of America
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI, United States of America
| | - Curtis T. Rueden
- Laboratory for Optical and Computational Instrumentation, Center for Quantitative Cell Imaging, University of Wisconsin, Madison, WI, United States of America
| | - Aivar R. Grislis
- Laboratory for Optical and Computational Instrumentation, Center for Quantitative Cell Imaging, University of Wisconsin, Madison, WI, United States of America
| | - Mark C. Hiner
- Laboratory for Optical and Computational Instrumentation, Center for Quantitative Cell Imaging, University of Wisconsin, Madison, WI, United States of America
| | - Kevin W. Eliceiri
- Laboratory for Optical and Computational Instrumentation, Center for Quantitative Cell Imaging, University of Wisconsin, Madison, WI, United States of America
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI, United States of America
- Department of Medical Physics, University of Wisconsin, Madison, WI, United States of America
- Morgridge Institute for Research, University of Wisconsin, Madison, WI, United States of America
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142
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Buttenschön A, Edelstein-Keshet L. Bridging from single to collective cell migration: A review of models and links to experiments. PLoS Comput Biol 2020; 16:e1008411. [PMID: 33301528 PMCID: PMC7728230 DOI: 10.1371/journal.pcbi.1008411] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Mathematical and computational models can assist in gaining an understanding of cell behavior at many levels of organization. Here, we review models in the literature that focus on eukaryotic cell motility at 3 size scales: intracellular signaling that regulates cell shape and movement, single cell motility, and collective cell behavior from a few cells to tissues. We survey recent literature to summarize distinct computational methods (phase-field, polygonal, Cellular Potts, and spherical cells). We discuss models that bridge between levels of organization, and describe levels of detail, both biochemical and geometric, included in the models. We also highlight links between models and experiments. We find that models that span the 3 levels are still in the minority.
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Affiliation(s)
- Andreas Buttenschön
- Department of Mathematics, University of British Columbia, Vancouver, Canada
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143
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144
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Hu W, Yang F, Pietraszak N, Gu J, Huang J. Distance dependent energy transfer dynamics from a molecular donor to a zeolitic imidazolate framework acceptor. Phys Chem Chem Phys 2020; 22:25445-25449. [PMID: 33166375 DOI: 10.1039/d0cp03995k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zeolitic Imidazolate frameworks (ZIFs) have been demonstrated as promising light harvesting and photocatalytic materials for solar energy conversion. To facilitate their application in photocatalysis, it is essential to develop a fundamental understanding of their light absorption properties and energy transfer dynamics. In this work, we report distance-dependent energy transfer dynamics from a molecular photosensitizer (RuN3) to ZIF-67, where the distance between RuN3 and ZIF-67 is finely tuned by depositing an ultrathin Al2O3 layer on the ZIF-67 surface using an atomic layer deposition (ALD) method. We show that energy transfer time decreases with increasing distance between RuN3 and ZIF-67 and the Förster radius is estimated to be 14.4 nm.
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Affiliation(s)
- Wenhui Hu
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201, USA.
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145
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Zhang Y, Chen X, Yuan S, Wang L, Guan X. Joint Entropy-Assisted Graphene Oxide-Based Multiplexing Biosensing Platform for Simultaneous Detection of Multiple Proteases. Anal Chem 2020; 92:15042-15049. [PMID: 33118812 DOI: 10.1021/acs.analchem.0c03007] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Due to the limited clinical utility of individual biomarkers, there is growing recognition of the need for combining multiple biomarkers as a panel to improve the accuracy and efficacy of disease diagnosis and prognosis. The conventional method to detect multiple analyte species is to construct a sensor array, which consists of an array of individual selective probes for different species. In this work, by using cancer biomarker matrix metalloproteinases (MMPs) and a disintegrin and metalloproteinases (ADAMs) as model analytes and functionalized nanographene oxide (nGO) as a sensing element, we developed a multiplexing fluorescence sensor in a nonarray format for simultaneous measurement of the activities of multiple proteases. The constructed nGO-based biosensor was rapid, sensitive, and selective and was also utilized for the successful profiling of ADAMs/MMPs in simulated serum samples. Furthermore, we showed that joint entropy and programming could be utilized to guide experiment design, especially in terms of the selection of a subset of proteases from the entire MMPs/ADAMs family as an appropriate biomarker panel. Our developed nGO-based multiplex sensing platform should find useful application in early cancer detection and diagnosis.
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Affiliation(s)
- Youwen Zhang
- Department of Chemistry, Illinois Institute of Technology, 3101 South Dearborn Street, Chicago, Illinois 60616, United States
| | - Xiaohan Chen
- Department of Chemistry, Illinois Institute of Technology, 3101 South Dearborn Street, Chicago, Illinois 60616, United States
| | - Shaoqing Yuan
- Amazon, 2121 Seventh Avenue, Seattle, Washington 98121, United States
| | - Liang Wang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China.,Chongqing School, University of Chinese Academy of Sciences, Chongqing, 400714, China
| | - Xiyun Guan
- Department of Chemistry, Illinois Institute of Technology, 3101 South Dearborn Street, Chicago, Illinois 60616, United States
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146
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Azarian S, Shaghaghi M, Dehghan G, Sheibani N. A rapid, simple and ultrasensitive spectrofluorimetric method for the direct detection of metformin in real samples based on a nanoquenching approach. LUMINESCENCE 2020; 36:658-667. [PMID: 33185014 DOI: 10.1002/bio.3982] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 10/08/2020] [Accepted: 11/07/2020] [Indexed: 11/07/2022]
Abstract
Metformin (MET), as an oral antidiabetic and antihyperglycemic agent, is widely used to treat type II diabetes mellitus. Because of its increasing consumption, developing a fast, simple, and selective method to determine its concentration in biological samples (serum and urine) and pharmaceutical formulations (tablets) is of great interest. In this study, we used a FRET-based fluorescent nanosensor (Tb-phen-AgNPs system) for sensitive detection of MET in tablet and serum samples. This method is based on the enhancing effect of MET on the emission intensity of the Tb-phen complex, which is quenched by AgNPs via energy transfer process (turn off-on mode). A good linear relationship between the MET concentration and enhanced emission intensity of the Tb-phen-AgNPs system was observed in the range of (0.75-3.7) × 10-6 M under optimum conditions. Limit of detection and limit of quantitation were calculated to be 0.43 × 10-6 M and 1.31 × 10-6 M, respectively. This method was successfully used to determine MET concentrations in pharmaceutical dosage form and in spiked serum sample. The obtained recoveries from pharmaceutical formulation and serum sample were in the range 86.75-98.97% and 85.10-100.96%, respectively. Collectively, our results indicated that the method described here is simple, sensitive, cost effective, and free from interference. Therefore, it can be used as an effective and routine method for the direct and rapid determination of MET levels in biological samples such as serum.
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Affiliation(s)
- Sina Azarian
- Department of Animal Biology, Faculty of Natural Science, University of Tabriz, Tabriz, Iran
| | - Masoomeh Shaghaghi
- Department of Chemistry, Payame Noor University, P. O. Box, Tehran, Iran
| | - Gholamreza Dehghan
- Department of Animal Biology, Faculty of Natural Science, University of Tabriz, Tabriz, Iran
| | - Nader Sheibani
- Departments of Ophthalmology and Visual Sciences, Cell and Regenerative Biology, and Biomedical Engineering, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
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147
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Shaghaghi M, Rashtbari S, Abdollahi A, Dehghan G, Jouyban A. A Sensitive, Simple and Direct Determination of Pantoprazole Based on a "Turn off-on" Fluorescence Nanosensor by Using Terbium-1,10-phenanthroline-silver Nanoparticles. ANAL SCI 2020; 36:1345-1352. [PMID: 33177314 DOI: 10.2116/analsci.20p142] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A new sensitive, simple, rapid, reliable and selective fluorometric method for the determination of pantoprazole (PAN) in human plasma and a pharmaceutical formulation has been developed. This technique is based on a quenching effect of silver nanoparticles (AgNPs) on the emission intensity of a fluorescent probe, terbium(III)-1,10-phenantroline (Tb(III)-phen) complex (due to a fluorescence resonance energy transfer (FRET) phenomenon between the Tb(III)-phen complex and AgNPs), and then restoring the fluorescence intensity of the Tb(III)-phen-AgNPs system upon the addition of PAN (turn off-on process). The effects of various factors on the proposed method including time, temperature, pH, order of the addition of various reagents and the concentration of AgNPs were investigated. Under the optimal conditions, a good linear relationship between the enhanced emission intensity of the Tb(III)-phen-AgNPs system and the PAN concentration was observed in the range of (10 - 1000) × 10-8 M. The limit of detection (LOD) and the limit of quantitation (LOQ) were 7.2 × 10-8 and 24.2 × 10-8 M, respectively. Also, the interferences of some common interfering species on the fluorescence intensity of the system were investigated. This simple and sensitive method was successfully applied for the determination of PAN in spiked human plasma samples and in its capsule formulation. The analytical recoveries were in the range of 88.54 - 101.33 and 90.07 - 98.85%, respectively.
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Affiliation(s)
| | - Samaneh Rashtbari
- Department of Biology, Faculty of Natural Sciences, University of Tabriz
| | | | - Gholamreza Dehghan
- Department of Biology, Faculty of Natural Sciences, University of Tabriz
| | - Abolghasem Jouyban
- Pharmaceutical Analysis Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, IranandDigestive Diseases Research Institute, Tehran University of Medical Sciences
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148
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Liu L, He F, Yu Y, Wang Y. Application of FRET Biosensors in Mechanobiology and Mechanopharmacological Screening. Front Bioeng Biotechnol 2020; 8:595497. [PMID: 33240867 PMCID: PMC7680962 DOI: 10.3389/fbioe.2020.595497] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Accepted: 10/19/2020] [Indexed: 12/15/2022] Open
Abstract
Extensive studies have shown that cells can sense and modulate the biomechanical properties of the ECM within their resident microenvironment. Thus, targeting the mechanotransduction signaling pathways provides a promising way for disease intervention. However, how cells perceive these mechanical cues of the microenvironment and transduce them into biochemical signals remains to be answered. Förster or fluorescence resonance energy transfer (FRET) based biosensors are a powerful tool that can be used in live-cell mechanotransduction imaging and mechanopharmacological drug screening. In this review, we will first introduce FRET principle and FRET biosensors, and then, recent advances on the integration of FRET biosensors and mechanobiology in normal and pathophysiological conditions will be discussed. Furthermore, we will summarize the current applications and limitations of FRET biosensors in high-throughput drug screening and the future improvement of FRET biosensors. In summary, FRET biosensors have provided a powerful tool for mechanobiology studies to advance our understanding of how cells and matrices interact, and the mechanopharmacological screening for disease intervention.
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Affiliation(s)
| | | | | | - Yingxiao Wang
- Department of Bioengineering, Institute of Engineering in Medicine, University of California, San Diego, La Jolla, CA, United States
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149
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Nuckolls NL, Mok AC, Lange JJ, Yi K, Kandola TS, Hunn AM, McCroskey S, Snyder JL, Bravo Núñez MA, McClain M, McKinney SA, Wood C, Halfmann R, Zanders SE. The wtf4 meiotic driver utilizes controlled protein aggregation to generate selective cell death. eLife 2020; 9:e55694. [PMID: 33108274 PMCID: PMC7591262 DOI: 10.7554/elife.55694] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 09/16/2020] [Indexed: 12/19/2022] Open
Abstract
Meiotic drivers are parasitic loci that force their own transmission into greater than half of the offspring of a heterozygote. Many drivers have been identified, but their molecular mechanisms are largely unknown. The wtf4 gene is a meiotic driver in Schizosaccharomyces pombe that uses a poison-antidote mechanism to selectively kill meiotic products (spores) that do not inherit wtf4. Here, we show that the Wtf4 proteins can function outside of gametogenesis and in a distantly related species, Saccharomyces cerevisiae. The Wtf4poison protein forms dispersed, toxic aggregates. The Wtf4antidote can co-assemble with the Wtf4poison and promote its trafficking to vacuoles. We show that neutralization of the Wtf4poison requires both co-assembly with the Wtf4antidote and aggregate trafficking, as mutations that disrupt either of these processes result in cell death in the presence of the Wtf4 proteins. This work reveals that wtf parasites can exploit protein aggregate management pathways to selectively destroy spores.
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Affiliation(s)
| | - Anthony C Mok
- Stowers Institute for Medical ResearchKansas CityUnited States
- University of Missouri-Kansas CityKansas CityUnited States
| | - Jeffrey J Lange
- Stowers Institute for Medical ResearchKansas CityUnited States
| | - Kexi Yi
- Stowers Institute for Medical ResearchKansas CityUnited States
| | - Tejbir S Kandola
- Stowers Institute for Medical ResearchKansas CityUnited States
- Open UniversityMilton KeynesUnited Kingdom
| | - Andrew M Hunn
- Stowers Institute for Medical ResearchKansas CityUnited States
| | - Scott McCroskey
- Stowers Institute for Medical ResearchKansas CityUnited States
| | - Julia L Snyder
- Stowers Institute for Medical ResearchKansas CityUnited States
| | | | | | - Sean A McKinney
- Stowers Institute for Medical ResearchKansas CityUnited States
| | | | - Randal Halfmann
- Stowers Institute for Medical ResearchKansas CityUnited States
- Department of Molecular and Integrative Physiology, University of Kansas Medical CenterKansas CityUnited States
| | - Sarah E Zanders
- Stowers Institute for Medical ResearchKansas CityUnited States
- Department of Molecular and Integrative Physiology, University of Kansas Medical CenterKansas CityUnited States
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150
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Li B, Cao Y, Westhof E, Miao Z. Advances in RNA 3D Structure Modeling Using Experimental Data. Front Genet 2020; 11:574485. [PMID: 33193680 PMCID: PMC7649352 DOI: 10.3389/fgene.2020.574485] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 09/02/2020] [Indexed: 12/26/2022] Open
Abstract
RNA is a unique bio-macromolecule that can both record genetic information and perform biological functions in a variety of molecular processes, including transcription, splicing, translation, and even regulating protein function. RNAs adopt specific three-dimensional conformations to enable their functions. Experimental determination of high-resolution RNA structures using x-ray crystallography is both laborious and demands expertise, thus, hindering our comprehension of RNA structural biology. The computational modeling of RNA structure was a milestone in the birth of bioinformatics. Although computational modeling has been greatly improved over the last decade showing many successful cases, the accuracy of such computational modeling is not only length-dependent but also varies according to the complexity of the structure. To increase credibility, various experimental data were integrated into computational modeling. In this review, we summarize the experiments that can be integrated into RNA structure modeling as well as the computational methods based on these experimental data. We also demonstrate how computational modeling can help the experimental determination of RNA structure. We highlight the recent advances in computational modeling which can offer reliable structure models using high-throughput experimental data.
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Affiliation(s)
- Bing Li
- Center of Growth, Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China
| | - Yang Cao
- Center of Growth, Metabolism and Aging, Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China
| | - Eric Westhof
- Architecture et Réactivité de l’ARN, Institut de Biologie Moléculaire et Cellulaire du CNRS, Université de Strasbourg, Strasbourg, France
| | - Zhichao Miao
- Translational Research Institute of Brain and Brain-Like Intelligence, Department of Anesthesiology, Shanghai Fourth People’s Hospital Affiliated to Tongji University School of Medicine, Shanghai, China
- Newcastle Fibrosis Research Group, Institute of Cellular Medicine, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
- European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Cambridge, United Kingdom
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