1
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Pieri E, Walker AR, Zhu M, Martínez TJ. Conical Intersection Accessibility Dictates Brightness in Red Fluorescent Proteins. J Am Chem Soc 2024; 146:17646-17658. [PMID: 38885641 DOI: 10.1021/jacs.4c00458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
Red fluorescent protein (RFP) variants are highly sought after for in vivo imaging since longer wavelengths improve depth and contrast in fluorescence imaging. However, the lower energy emission wavelength usually correlates with a lower fluorescent quantum yield compared to their green emitting counterparts. To guide the rational design of bright variants, we have theoretically assessed two variants (mScarlet and mRouge) which are reported to have very different brightness. Using an α-CASSCF QM/MM framework (chromophore and all protein residues within 6 Å of it in the QM region, for a total of more than 450 QM atoms), we identify key points on the ground and first excited state potential energy surfaces. The brighter variant mScarlet has a rigid scaffold, and the chromophore stays largely planar on the ground state. The dimmer variant mRouge shows more flexibility and can accommodate a pretwisted chromophore conformation which provides easier access to conical intersections. The main difference between the variants lies in the intersection seam regions, which appear largely inaccessible in mScarlet but partially accessible in mRouge. This observation is mainly related with changes in the cavity charge distribution, the hydrogen-bonding network involving the chromophore and a key ARG/THR mutation (which changes both charge and steric hindrance).
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Affiliation(s)
- Elisa Pieri
- Department of Chemistry and The PULSE Institute, Stanford University, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, United States
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599, United States
| | - Alice R Walker
- Department of Chemistry and The PULSE Institute, Stanford University, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, United States
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, United States
| | - Mingning Zhu
- Department of Chemistry and The PULSE Institute, Stanford University, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, United States
| | - Todd J Martínez
- Department of Chemistry and The PULSE Institute, Stanford University, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, United States
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2
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Ruto A, Seki H, Osaki K, Kaneno D, Hadano S, Watanabe S, Niko Y. Synthesis of 1,3-Dibromopyrene as Precursor of 1-, 3-, 6-, and 8-Substituted Long-Axially Symmetric Pyrene Derivatives. Chemistry 2024; 30:e202401152. [PMID: 38683696 DOI: 10.1002/chem.202401152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 04/29/2024] [Accepted: 04/29/2024] [Indexed: 05/02/2024]
Abstract
Pyrene derivatives bearing substituents at positions 1, 3, 6, and 8 find numerous applications, as exemplified by their use in lasers, sensors, and bioimaging probes. However, these derivatives typically have point-symmetric or short-axially symmetric structures, whereas long-axially symmetric derivatives remain underexplored because of the difficulty in obtaining their precursor, 1,3-dibromopyrene. To address this problem, we herein synthesized 1,3-dibromopyrene from 1-methoxypyrene in an overall yield (71 % over four steps) considerably exceeding those of existing methods. 1,3-Dibromopyrene was converted into 13OPA, a long-axially symmetric pyrene dye with electron-donor (alkoxy) groups at positions 1 and 3 and electron-acceptor (formyl) groups at positions 6 and 8. 13OPA exhibited photophysical properties distinct from those of its point-symmetric and short-axially symmetric isomers, featuring a broad and strongly redshifted absorption, strong fluorescence with reduced sensitivity to protic solvents, and small dipole moment change upon photoexcitation. The derivatization of 13OPA into a Schiff base and its functionalization via Lewis acid-base pairing were also demonstrated. Thus, our work expands the design scope of pyrene-based molecules, particularly those used as emitters.
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Affiliation(s)
- Asuka Ruto
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, 2-5-1, Akebono-cho, Kochi-shi, Kochi, 780-8520, Japan
- TOSA Innovative Human Development Programs, Kochi University, 2-5-1, Akebono-cho, Kochi-shi, Kochi, 780-8520, Japan
| | - Hitomi Seki
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, 2-5-1, Akebono-cho, Kochi-shi, Kochi, 780-8520, Japan
| | - Katsuki Osaki
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, 2-5-1, Akebono-cho, Kochi-shi, Kochi, 780-8520, Japan
| | - Daisuke Kaneno
- Department of Applied Science, Graduate School of Integrated Arts and Sciences, Kochi University, 200 Otsu, Monobe, Nankoku, Kochi, 783-8502, Japan
| | - Shingo Hadano
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, 2-5-1, Akebono-cho, Kochi-shi, Kochi, 780-8520, Japan
| | - Shigeru Watanabe
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, 2-5-1, Akebono-cho, Kochi-shi, Kochi, 780-8520, Japan
| | - Yosuke Niko
- Research and Education Faculty, Multidisciplinary Science Cluster, Interdisciplinary Science Unit, Kochi University, 2-5-1, Akebono-cho, Kochi-shi, Kochi, 780-8520, Japan
- TOSA Innovative Human Development Programs, Kochi University, 2-5-1, Akebono-cho, Kochi-shi, Kochi, 780-8520, Japan
- Center for Photodynamic Medicine, Kochi Medical School, Kochi University, Kohasu, Oko-cho, Nankoku, Kochi, 783-8505, Japan
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3
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Wehn AC, Krestel E, Harapan BN, Klymchenko A, Plesnila N, Khalin I. To see or not to see: In vivo nanocarrier detection methods in the brain and their challenges. J Control Release 2024; 371:216-236. [PMID: 38810705 DOI: 10.1016/j.jconrel.2024.05.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 05/18/2024] [Accepted: 05/23/2024] [Indexed: 05/31/2024]
Abstract
Nanoparticles have a great potential to significantly improve the delivery of therapeutics to the brain and may also be equipped with properties to investigate brain function. The brain, being a highly complex organ shielded by selective barriers, requires its own specialized detection system. However, a significant hurdle to achieve these goals is still the identification of individual nanoparticles within the brain with sufficient cellular, subcellular, and temporal resolution. This review aims to provide a comprehensive summary of the current knowledge on detection systems for tracking nanoparticles across the blood-brain barrier and within the brain. We discuss commonly employed in vivo and ex vivo nanoparticle identification and quantification methods, as well as various imaging modalities able to detect nanoparticles in the brain. Advantages and weaknesses of these modalities as well as the biological factors that must be considered when interpreting results obtained through nanotechnologies are summarized. Finally, we critically evaluate the prevailing limitations of existing technologies and explore potential solutions.
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Affiliation(s)
- Antonia Clarissa Wehn
- Institute for Stroke and Dementia Research (ISD), Munich University Hospital, Feodor-Lynen-Straße 17, 81377, Germany; Department of Neurosurgery, University of Munich Medical Center, Marchioninistraße 17, 81377 Munich, Germany.
| | - Eva Krestel
- Institute for Stroke and Dementia Research (ISD), Munich University Hospital, Feodor-Lynen-Straße 17, 81377, Germany.
| | - Biyan Nathanael Harapan
- Institute for Stroke and Dementia Research (ISD), Munich University Hospital, Feodor-Lynen-Straße 17, 81377, Germany; Department of Neurosurgery, University of Munich Medical Center, Marchioninistraße 17, 81377 Munich, Germany.
| | - Andrey Klymchenko
- Laboratoire de Biophotonique et Pharmacologie, CNRS UMR 7213, Université de Strasbourg, 74 route du Rhin - CS 60024, 67401 Illkirch Cedex, France.
| | - Nikolaus Plesnila
- Institute for Stroke and Dementia Research (ISD), Munich University Hospital, Feodor-Lynen-Straße 17, 81377, Germany; Munich Cluster of Systems Neurology (SyNergy), Feodor-Lynen-Straße 17, 81377 Munich, Germany.
| | - Igor Khalin
- Institute for Stroke and Dementia Research (ISD), Munich University Hospital, Feodor-Lynen-Straße 17, 81377, Germany; Normandie University, UNICAEN, INSERM UMR-S U1237, Physiopathology and Imaging of Neurological Disorders (PhIND), GIP Cyceron, Institute Blood and Brain @ Caen-Normandie (BB@C), 14 074 Bd Henri Becquerel, 14000 Caen, France.
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4
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Gest AMM, Lazzari-Dean JR, Ortiz G, Yaeger-Weiss SK, Boggess SC, Miller EW. A red-emitting carborhodamine for monitoring and measuring membrane potential. Proc Natl Acad Sci U S A 2024; 121:e2315264121. [PMID: 38551837 PMCID: PMC10998576 DOI: 10.1073/pnas.2315264121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 01/25/2024] [Indexed: 04/02/2024] Open
Abstract
Biological membrane potentials, or voltages, are a central facet of cellular life. Optical methods to visualize cellular membrane voltages with fluorescent indicators are an attractive complement to traditional electrode-based approaches, since imaging methods can be high throughput, less invasive, and provide more spatial resolution than electrodes. Recently developed fluorescent indicators for voltage largely report changes in membrane voltage by monitoring voltage-dependent fluctuations in fluorescence intensity. However, it would be useful to be able to not only monitor changes but also measure values of membrane potentials. This study discloses a fluorescent indicator which can address both. We describe the synthesis of a sulfonated tetramethyl carborhodamine fluorophore. When this carborhodamine is conjugated with an electron-rich, methoxy (-OMe) containing phenylenevinylene molecular wire, the resulting molecule, CRhOMe, is a voltage-sensitive fluorophore with red/far-red fluorescence. Using CRhOMe, changes in cellular membrane potential can be read out using fluorescence intensity or lifetime. In fluorescence intensity mode, CRhOMe tracks fast-spiking neuronal action potentials (APs) with greater signal-to-noise than state-of-the-art BeRST 1 (another voltage-sensitive fluorophore). CRhOMe can also measure values of membrane potential. The fluorescence lifetime of CRhOMe follows a single exponential decay, substantially improving the quantification of membrane potential values using fluorescence lifetime imaging microscopy (FLIM). The combination of red-shifted excitation and emission, mono-exponential decay, and high voltage sensitivity enable fast FLIM recording of APs in cardiomyocytes. The ability to both monitor and measure membrane potentials with red light using CRhOMe makes it an important approach for studying biological voltages.
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Affiliation(s)
| | | | - Gloria Ortiz
- Department of Chemistry, University of California, Berkeley, CA 94720
| | | | - Steven C Boggess
- Department of Chemistry, University of California, Berkeley, CA 94720
| | - Evan W Miller
- Department of Chemistry, University of California, Berkeley, CA 94720
- Department of Molecular & Cell Biology, University of California, Berkeley, CA 94720
- Helen Wills Neuroscience Institute, University of California, Berkeley, CA 94720
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5
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Morabito A, Malkmus J, Pancho A, Zuniga A, Zeller R, Sheth R. Optimized protocol for whole-mount RNA fluorescent in situ hybridization using oxidation-mediated autofluorescence reduction on mouse embryos. STAR Protoc 2023; 4:102603. [PMID: 37742180 PMCID: PMC10522992 DOI: 10.1016/j.xpro.2023.102603] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 07/28/2023] [Accepted: 09/07/2023] [Indexed: 09/26/2023] Open
Abstract
Tissue autofluorescence poses significant challenges for RNA and protein analysis using fluorescence-based techniques. Here, we present a protocol that combines oxidation-mediated autofluorescence reduction with detergent-based tissue permeabilization for whole-mount RNA-fluorescence in situ hybridization (FISH) on mouse embryonic limb buds. We describe the steps for embryo collection, fixation, photochemical bleaching, permeabilization, and RNA-FISH, followed by optical clearing of RNA-FISH and immunofluorescence samples for imaging. The protocol alleviates the need for digital image post-processing to remove autofluorescence and is applicable to other tissues, organs, and vertebrate embryos.
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Affiliation(s)
- Angela Morabito
- Developmental Genetics, Department of Biomedicine, University of Basel, 4058 Basel, Switzerland
| | - Jonas Malkmus
- Developmental Genetics, Department of Biomedicine, University of Basel, 4058 Basel, Switzerland
| | - Anna Pancho
- Developmental Genetics, Department of Biomedicine, University of Basel, 4058 Basel, Switzerland
| | - Aimée Zuniga
- Developmental Genetics, Department of Biomedicine, University of Basel, 4058 Basel, Switzerland
| | - Rolf Zeller
- Developmental Genetics, Department of Biomedicine, University of Basel, 4058 Basel, Switzerland
| | - Rushikesh Sheth
- Developmental Genetics, Department of Biomedicine, University of Basel, 4058 Basel, Switzerland.
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6
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Sermonesi G, Tian BWCA, Vallicelli C, Abu-Zidan FM, Damaskos D, Kelly MD, Leppäniemi A, Galante JM, Tan E, Kirkpatrick AW, Khokha V, Romeo OM, Chirica M, Pikoulis M, Litvin A, Shelat VG, Sakakushev B, Wani I, Sall I, Fugazzola P, Cicuttin E, Toro A, Amico F, Mas FD, De Simone B, Sugrue M, Bonavina L, Campanelli G, Carcoforo P, Cobianchi L, Coccolini F, Chiarugi M, Di Carlo I, Di Saverio S, Podda M, Pisano M, Sartelli M, Testini M, Fette A, Rizoli S, Picetti E, Weber D, Latifi R, Kluger Y, Balogh ZJ, Biffl W, Jeekel H, Civil I, Hecker A, Ansaloni L, Bravi F, Agnoletti V, Beka SG, Moore EE, Catena F. Cesena guidelines: WSES consensus statement on laparoscopic-first approach to general surgery emergencies and abdominal trauma. World J Emerg Surg 2023; 18:57. [PMID: 38066631 PMCID: PMC10704840 DOI: 10.1186/s13017-023-00520-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 11/01/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND Laparoscopy is widely adopted across nearly all surgical subspecialties in the elective setting. Initially finding indication in minor abdominal emergencies, it has gradually become the standard approach in the majority of elective general surgery procedures. Despite many technological advances and increasing acceptance, the laparoscopic approach remains underutilized in emergency general surgery and in abdominal trauma. Emergency laparotomy continues to carry a high morbidity and mortality. In recent years, there has been a growing interest from emergency and trauma surgeons in adopting minimally invasive surgery approaches in the acute surgical setting. The present position paper, supported by the World Society of Emergency Surgery (WSES), aims to provide a review of the literature to reach a consensus on the indications and benefits of a laparoscopic-first approach in patients requiring emergency abdominal surgery for general surgery emergencies or abdominal trauma. METHODS This position paper was developed according to the WSES methodology. A steering committee performed the literature review and drafted the position paper. An international panel of 54 experts then critically revised the manuscript and discussed it in detail, to develop a consensus on a position statement. RESULTS A total of 323 studies (systematic review and meta-analysis, randomized clinical trial, retrospective comparative cohort studies, case series) have been selected from an initial pool of 7409 studies. Evidence demonstrates several benefits of the laparoscopic approach in stable patients undergoing emergency abdominal surgery for general surgical emergencies or abdominal trauma. The selection of a stable patient seems to be of paramount importance for a safe adoption of a laparoscopic approach. In hemodynamically stable patients, the laparoscopic approach was found to be safe, feasible and effective as a therapeutic tool or helpful to identify further management steps and needs, resulting in improved outcomes, regardless of conversion. Appropriate patient selection, surgeon experience and rigorous minimally invasive surgical training, remain crucial factors to increase the adoption of laparoscopy in emergency general surgery and abdominal trauma. CONCLUSIONS The WSES expert panel suggests laparoscopy as the first approach for stable patients undergoing emergency abdominal surgery for general surgery emergencies and abdominal trauma.
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Affiliation(s)
- Giacomo Sermonesi
- Department of General and Emergency Surgery, Bufalini Hospital-Level 1 Trauma Center, Cesena, Italy
| | - Brian W C A Tian
- Department of General Surgery, Singapore General Hospital, Singapore, Singapore
| | - Carlo Vallicelli
- Department of General and Emergency Surgery, Bufalini Hospital-Level 1 Trauma Center, Cesena, Italy
| | - Fikri M Abu-Zidan
- Department of Surgery, College of Medicine and Health Sciences, United Arab Emirates University, Al‑Ain, United Arab Emirates
| | | | | | - Ari Leppäniemi
- Abdominal Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Joseph M Galante
- Division of Trauma and Acute Care Surgery, Department of Surgery, University of California Davis, Sacramento, CA, USA
| | - Edward Tan
- Department of Surgery, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Andrew W Kirkpatrick
- Departments of Surgery and Critical Care Medicine, University of Calgary, Foothills Medical Centre, Calgary, AB, Canada
| | - Vladimir Khokha
- Department of Emergency Surgery, City Hospital, Mozyr, Belarus
| | - Oreste Marco Romeo
- Trauma, Burn, and Surgical Care Program, Bronson Methodist Hospital, Kalamazoo, MI, USA
| | - Mircea Chirica
- Department of Digestive Surgery, Centre Hospitalier Universitaire Grenoble Alpes, La Tronche, France
| | - Manos Pikoulis
- 3Rd Department of Surgery, Attikon General Hospital, National and Kapodistrian University of Athens (NKUA), Athens, Greece
| | - Andrey Litvin
- Department of Surgical Diseases No. 3, Gomel State Medical University, Gomel, Belarus
| | | | - Boris Sakakushev
- General Surgery Department, Medical University, University Hospital St George, Plovdiv, Bulgaria
| | - Imtiaz Wani
- Department of Surgery, Sheri-Kashmir Institute of Medical Sciences, Srinagar, India
| | - Ibrahima Sall
- General Surgery Department, Military Teaching Hospital, Dakar, Senegal
| | - Paola Fugazzola
- Department of Surgery, Fondazione IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy
| | - Enrico Cicuttin
- Department of General, Emergency and Trauma Surgery, Pisa University Hospital, Pisa, Italy
| | - Adriana Toro
- Department of Surgical Sciences and Advanced Technologies, General Surgery Cannizzaro Hospital, University of Catania, Catania, Italy
| | - Francesco Amico
- Discipline of Surgery, School of Medicine and Public Health, Newcastle, Australia
| | - Francesca Dal Mas
- Department of Management, Ca' Foscari University of Venice, Campus Economico San Giobbe Cannaregio, 873, 30100, Venice, Italy
| | - Belinda De Simone
- Department of Emergency Surgery, Centre Hospitalier Intercommunal de Villeneuve-Saint-Georges, Villeneuve-Saint-Georges, France
| | - Michael Sugrue
- Donegal Clinical Research Academy Emergency Surgery Outcome Project, Letterkenny University Hospital, Donegal, Ireland
| | - Luigi Bonavina
- Department of Surgery, IRCCS Policlinico San Donato, University of Milano, Milan, Italy
| | | | - Paolo Carcoforo
- Department of Surgery, S. Anna University Hospital and University of Ferrara, Ferrara, Italy
| | - Lorenzo Cobianchi
- Department of Surgery, Fondazione IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy
| | - Federico Coccolini
- Department of General, Emergency and Trauma Surgery, Pisa University Hospital, Pisa, Italy
| | - Massimo Chiarugi
- Department of General, Emergency and Trauma Surgery, Pisa University Hospital, Pisa, Italy
| | - Isidoro Di Carlo
- Department of Surgical Sciences and Advanced Technologies, General Surgery Cannizzaro Hospital, University of Catania, Catania, Italy
| | - Salomone Di Saverio
- General Surgery Department Hospital of San Benedetto del Tronto, Marche Region, Italy
| | - Mauro Podda
- Department of Surgical Science, Emergency Surgery Unit, University of Cagliari, Cagliari, Italy
| | - Michele Pisano
- General and Emergency Surgery, ASST Papa Giovanni XXIII, Bergamo, Italy
| | | | - Mario Testini
- Department of Precision and Regenerative Medicine and Ionian Area, Unit of Academic General Surgery, University of Bari "A. Moro", Bari, Italy
| | - Andreas Fette
- Pediatric Surgery, Children's Care Center, SRH Klinikum Suhl, Suhl, Thuringia, Germany
| | - Sandro Rizoli
- Surgery Department, Section of Trauma Surgery, Hamad General Hospital (HGH), Doha, Qatar
| | - Edoardo Picetti
- Department of Anesthesia and Intensive Care, Azienda Ospedaliero‑Universitaria Parma, Parma, Italy
| | - Dieter Weber
- Department of Trauma Surgery, Royal Perth Hospital, Perth, Australia
| | - Rifat Latifi
- Department of Surgery, Westchester Medical Center, New York Medical College, Valhalla, NY, USA
| | - Yoram Kluger
- Department of General Surgery, Rambam Health Care Campus, Haifa, Israel
| | - Zsolt Janos Balogh
- Department of Traumatology, John Hunter Hospital and University of Newcastle, Newcastle, NSW, Australia
| | - Walter Biffl
- Division of Trauma/Acute Care Surgery, Scripps Clinic Medical Group, La Jolla, CA, USA
| | - Hans Jeekel
- Department of Surgery, Erasmus University Medical Centre, Rotterdam, The Netherlands
| | - Ian Civil
- Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Andreas Hecker
- Emergency Medicine Department of General and Thoracic Surgery, University Hospital of Giessen, Giessen, Germany
| | - Luca Ansaloni
- Department of Surgery, Fondazione IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy
| | - Francesca Bravi
- Healthcare Administration, Santa Maria Delle Croci Hospital, Ravenna, Italy
| | - Vanni Agnoletti
- Department of General and Emergency Surgery, Bufalini Hospital-Level 1 Trauma Center, Cesena, Italy
| | | | - Ernest Eugene Moore
- Ernest E Moore Shock Trauma Center at Denver Health, University of Colorado, Denver, CO, USA
| | - Fausto Catena
- Department of General and Emergency Surgery, Bufalini Hospital-Level 1 Trauma Center, Cesena, Italy
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7
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M M, Patidar RK, Tiwari R, Srivastava N, Ranjan N. Nile Blue: A Red-Emissive Fluorescent Dye That Displays Differential Self-Assembly and Binding to G-Quadruplexes. J Phys Chem B 2023; 127:9915-9925. [PMID: 37956021 DOI: 10.1021/acs.jpcb.3c05084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Nile Blue (NB) is a red-emissive dye that is well-known for imaging and staining applications. In this work, we describe the interaction of NB with various types of G-quadruplexes belonging to different topologies, molecularities, and conformations. Using spectroscopic techniques, we have determined the preferential binding of NB to c-Myc G-quadruplex and the other aspects of its binding. Concentration- and temperature-dependent studies showed that NB exists in a dynamic equilibrium between monomeric and H-aggregated states, which could be modulated by the addition of external agents such as anionic surfactants. NB displayed differential self-assembly with different types of G-quadruplex and duplex DNAs modulating its dynamic equilibrium between the monomeric and H-aggregated states. Fluorescence-based displacement studies revealed a 1:1 binding stoichiometry upon interaction with c-Myc G-quadruplex and an association constant of Kapp = 6.7 × 106 M-1. Circular dichroism studies indicated that NB does not cause changes in the overall conformation of either G-quadruplexes or duplexes; however, it does indicate nucleic acid-dependent self-assembly at higher concentrations. Heat capacity measurement showed a more negative change when compared to that in DNA duplex, indicating more burial of the polar surface area by NB to the G-quadruplex host.
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Affiliation(s)
- Midhun M
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research-Raebareli, New Transit Campus, Lucknow 226002, Uttar Pradesh, India
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research-Raebareli, New Transit Campus, Lucknow 226002, Uttar Pradesh, India
| | - Rajesh Kumar Patidar
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research-Raebareli, New Transit Campus, Lucknow 226002, Uttar Pradesh, India
| | - Ratnesh Tiwari
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research-Raebareli, New Transit Campus, Lucknow 226002, Uttar Pradesh, India
| | - Nidhi Srivastava
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research-Raebareli, New Transit Campus, Lucknow 226002, Uttar Pradesh, India
| | - Nihar Ranjan
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research-Raebareli, New Transit Campus, Lucknow 226002, Uttar Pradesh, India
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8
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Mirón GD, Semelak JA, Grisanti L, Rodriguez A, Conti I, Stella M, Velusamy J, Seriani N, Došlić N, Rivalta I, Garavelli M, Estrin DA, Kaminski Schierle GS, González Lebrero MC, Hassanali A, Morzan UN. The carbonyl-lock mechanism underlying non-aromatic fluorescence in biological matter. Nat Commun 2023; 14:7325. [PMID: 37957206 PMCID: PMC10643446 DOI: 10.1038/s41467-023-42874-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 10/24/2023] [Indexed: 11/15/2023] Open
Abstract
Challenging the basis of our chemical intuition, recent experimental evidence reveals the presence of a new type of intrinsic fluorescence in biomolecules that exists even in the absence of aromatic or electronically conjugated chemical compounds. The origin of this phenomenon has remained elusive so far. In the present study, we identify a mechanism underlying this new type of fluorescence in different biological aggregates. By employing non-adiabatic ab initio molecular dynamics simulations combined with a data-driven approach, we characterize the typical ultrafast non-radiative relaxation pathways active in non-fluorescent peptides. We show that the key vibrational mode for the non-radiative decay towards the ground state is the carbonyl elongation. Non-aromatic fluorescence appears to emerge from blocking this mode with strong local interactions such as hydrogen bonds. While we cannot rule out the existence of alternative non-aromatic fluorescence mechanisms in other systems, we demonstrate that this carbonyl-lock mechanism for trapping the excited state leads to the fluorescence yield increase observed experimentally, and set the stage for design principles to realize novel non-invasive biocompatible probes with applications in bioimaging, sensing, and biophotonics.
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Affiliation(s)
- Gonzalo Díaz Mirón
- Departamento de Química Inorgánica, Analítica y Química Física, Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Jonathan A Semelak
- Departamento de Química Inorgánica, Analítica y Química Física, Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Luca Grisanti
- Division of Theoretical Physics, Ruder Bošković Institute, Zagreb, Croatia
| | - Alex Rodriguez
- Condensed Matter and Statistical Physics, The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy
| | - Irene Conti
- Dipartimento di Chimica industriale "Toso Montanari", Università di Bologna, Bologna, Italy
| | - Martina Stella
- Condensed Matter and Statistical Physics, The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy
| | | | - Nicola Seriani
- Condensed Matter and Statistical Physics, The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy
| | - Nadja Došlić
- Division of Theoretical Physics, Ruder Bošković Institute, Zagreb, Croatia
| | - Ivan Rivalta
- Dipartimento di Chimica industriale "Toso Montanari", Università di Bologna, Bologna, Italy
- ENSL, CNRS, Lyon, France
| | - Marco Garavelli
- Dipartimento di Chimica industriale "Toso Montanari", Università di Bologna, Bologna, Italy
| | - Dario A Estrin
- Departamento de Química Inorgánica, Analítica y Química Física, Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | | | - Mariano C González Lebrero
- Departamento de Química Inorgánica, Analítica y Química Física, Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Ali Hassanali
- Condensed Matter and Statistical Physics, The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy.
| | - Uriel N Morzan
- Condensed Matter and Statistical Physics, The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy.
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9
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Kumar GD, Liao YC, Nazir R, Banasiewicz M, Chou PT, Gryko DT. Strongly emitting, centrosymmetric, ladder-type bis-coumarins with crankshaft architecture. Phys Chem Chem Phys 2023; 25:28824-28828. [PMID: 37853830 DOI: 10.1039/d3cp04121b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2023]
Abstract
Quadrupolar bis-coumarins bearing dialkylamino groups, prepared by a double Pechmann reaction and subsequent oxidation, strongly emit yellow-orange light. Comparison with non-substituted analogs reveals that, the photophysical properties of the conjugated bis-coumarins are controlled both by the dialkylamino substituents and by the π-system. Analogous but non-conjugated bis-coumarins emit blue light both in solution and in crystalline state. Unusually fast oxidation process in the crystalline state is responsible for the presence of two bands in their solid-state emission. Two-center, charge-transfer transition from an orbital delocalized on the entire molecule to the central benzene ring is responsible for photophysical properties.
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Affiliation(s)
- G Dinesh Kumar
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland.
| | - Yu-Chan Liao
- Department of Chemistry, National Taiwan University, 1 Roosevelt Road Section 4, Taipei 106, Taiwan.
| | - Rashid Nazir
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland.
- Advanced Fibers, Empa Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, St. Gallen 9014, Switzerland
| | - Marzena Banasiewicz
- Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, Warsaw 02-668, Poland
| | - Pi-Tai Chou
- Department of Chemistry, National Taiwan University, 1 Roosevelt Road Section 4, Taipei 106, Taiwan.
| | - Daniel T Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland.
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10
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Gest AMM, Lazzari-Dean JR, Ortiz G, Yaeger-Weiss SK, Boggess SC, Miller EW. A red-emitting carborhodamine for monitoring and measuring membrane potential. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.10.06.561080. [PMID: 37873283 PMCID: PMC10592620 DOI: 10.1101/2023.10.06.561080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Biological membrane potentials, or voltages, are a central facet of cellular life. Optical methods to visualize cellular membrane voltages with fluorescent indicators are an attractive complement to traditional electrode-based approaches, since imaging methods can be high throughput, less invasive, and provide more spatial resolution than electrodes. Recently developed fluorescent indicators for voltage largely report changes in membrane voltage by monitoring voltage-dependent fluctuations in fluorescence intensity. However, it would be useful to be able to not only monitor changes, but also measure values of membrane potentials. This study discloses a new fluorescent indicator which can address both. We describe the synthesis of a new sulfonated tetramethyl carborhodamine fluorophore. When this carborhodamine is conjugated with an electron-rich, methoxy (-OMe) containing phenylenevinylene molecular wire, the resulting molecule, CRhOMe, is a voltage-sensitive fluorophore with red/far-red fluorescence. Using CRhOMe, changes in cellular membrane potential can be read out using fluorescence intensity or lifetime. In fluorescence intensity mode, CRhOMe tracks fast-spiking neuronal action potentials with greater signal-to-noise than state-of-the-art BeRST (another voltage-sensitive fluorophore). CRhOMe can also measure values of membrane potential. The fluorescence lifetime of CRhOMe follows a single exponential decay, substantially improving the quantification of membrane potential values using fluorescence lifetime imaging microscopy (FLIM). The combination of red-shifted excitation and emission, mono-exponential decay, and high voltage sensitivity enable fast FLIM recording of action potentials in cardiomyocytes. The ability to both monitor and measure membrane potentials with red light using CRhOMe makes it an important approach for studying biological voltages.
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Affiliation(s)
| | | | - Gloria Ortiz
- Department of Chemistry, University of California, Berkeley
| | | | | | - Evan W Miller
- Department of Chemistry, University of California, Berkeley
- Department of Molecular & Cell Biology, University of California, Berkeley
- Helen Wills Neuroscience Institute, University of California, Berkeley
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11
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Dai M, Yang YJ, Sarkar S, Ahn KH. Strategies to convert organic fluorophores into red/near-infrared emitting analogues and their utilization in bioimaging probes. Chem Soc Rev 2023; 52:6344-6358. [PMID: 37608780 DOI: 10.1039/d3cs00475a] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Organic fluorophores aided by current microscopy imaging modalities are essential for studying biological systems. Recently, red/near-infrared emitting fluorophores have attracted great research efforts, as they enable bioimaging applications with reduced autofluorescence interference and light scattering, two significant obstacles for deep-tissue imaging, as well as reduced photodamage and photobleaching. Herein, we analyzed the current strategies to convert key organic fluorophores bearing xanthene, coumarin, and naphthalene cores into longer wavelength-emitting derivatives by focussing on their effectiveness and limitations. Together, we introduced typical examples of how such fluorophores can be used to develop molecular probes for biological analytes, along with key sensing features. Finally, we listed several critical issues to be considered in developing new fluorophores.
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Affiliation(s)
- Mingchong Dai
- Department of Chemistry, Pohang University of Science and Technology, Pohang, 37673, South Korea.
- CEDAR, Knight Cancer Institute, School of Medicine, Oregon Health & Science University, Portland, Oregon, 97201, USA.
| | - Yun Jae Yang
- Department of Chemistry, Pohang University of Science and Technology, Pohang, 37673, South Korea.
| | - Sourav Sarkar
- Department of Chemistry, Pohang University of Science and Technology, Pohang, 37673, South Korea.
| | - Kyo Han Ahn
- Department of Chemistry, Pohang University of Science and Technology, Pohang, 37673, South Korea.
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12
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Li R, Vedelaar TA, Sigaeva A, Zhang Y, Wu K, Wang H, Wu X, Olinga P, Wlodarzyk-Biegun M, Schirhagl R. Fluorescent Nanodiamonds for Tracking Single Polymer Particles in Cells and Tissues. Anal Chem 2023; 95:13046-13054. [PMID: 37612789 PMCID: PMC10483464 DOI: 10.1021/acs.analchem.3c01452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 08/07/2023] [Indexed: 08/25/2023]
Abstract
Polymer nanoparticles are widely used in drug delivery and are also a potential concern due to the increased burden of nano- or microplastics in the environment. In order to use polymer nanoparticles safely and understand their mechanism of action, it is useful to know where within cells and tissues they end up. To this end, we labeled polymer nanoparticles with nanodiamond particles. More specifically, we have embedded nanodiamond particles in the polymer particles and characterized the composites. Compared to conventional fluorescent dyes, these labels have the advantage that nanodiamonds do not bleach or blink, thus allowing long-term imaging and tracking of polymer particles. We have demonstrated this principle both in cells and entire liver tissues.
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Affiliation(s)
- Runrun Li
- Department
of Biomedical Engineering, Groningen University,
University Medical Center Groningen, Antonius Deusinglaan 1, 9713AV Groningen, The Netherlands
| | - Thea A. Vedelaar
- Department
of Biomedical Engineering, Groningen University,
University Medical Center Groningen, Antonius Deusinglaan 1, 9713AV Groningen, The Netherlands
| | - Alina Sigaeva
- Department
of Biomedical Engineering, Groningen University,
University Medical Center Groningen, Antonius Deusinglaan 1, 9713AV Groningen, The Netherlands
| | - Yue Zhang
- Department
of Biomedical Engineering, Groningen University,
University Medical Center Groningen, Antonius Deusinglaan 1, 9713AV Groningen, The Netherlands
| | - Kaiqi Wu
- Department
of Biomedical Engineering, Groningen University,
University Medical Center Groningen, Antonius Deusinglaan 1, 9713AV Groningen, The Netherlands
| | - Hui Wang
- Zernike
Institute for Advanced Materials, Groningen
University, Nijenborgh
4, 9747 AG Groningen, The Netherlands
| | - Xixi Wu
- Department
of Biomedical Engineering, Groningen University,
University Medical Center Groningen, Antonius Deusinglaan 1, 9713AV Groningen, The Netherlands
- Zernike
Institute for Advanced Materials, Groningen
University, Nijenborgh
4, 9747 AG Groningen, The Netherlands
| | - Peter Olinga
- Department
of Pharmaceutical Technology and Biopharmacy, Groningen University, University Medical Center Groningen, Antonius Deusinglaan 1, 9713AV Groningen, The Netherlands
| | - Małgorzata
K. Wlodarzyk-Biegun
- Zernike
Institute for Advanced Materials, Groningen
University, Nijenborgh
4, 9747 AG Groningen, The Netherlands
- Biotechnology
Centre, The Silesian University of Technology, Krzywoustego 8, 44-100 Gliwice, Poland
| | - Romana Schirhagl
- Department
of Biomedical Engineering, Groningen University,
University Medical Center Groningen, Antonius Deusinglaan 1, 9713AV Groningen, The Netherlands
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13
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Yang YJ, Dai M, Ahn KH. Cell-Membrane-Localizing Fluorescence Probes for Aminopeptidase N. ACS Sens 2023; 8:2791-2798. [PMID: 37405930 DOI: 10.1021/acssensors.3c00730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/07/2023]
Abstract
Aminopeptidase N (APN), a transmembrane ectoenzyme, plays multifunctional roles in cell survival and migration, angiogenesis, blood pressure regulation, and viral uptake. Abnormally high levels of the enzyme can be found in some tumors and injured liver and kidney. Therefore, noninvasive detection methods for APN are in demand for diagnosing and studying the associated diseases, leading to two dozen activatable small-molecule probes reported up to date. All of the known probes, however, analyze the enzyme activity by monitoring fluorescent molecules inside cells, despite the enzymatic reaction taking place on the outer cell membrane. In this case, different cell permeability and enzyme kinetics can cause false signal data. To address this critical issue, we have developed two cell-membrane-localizing APN probes whose enzymatic products also localize the outer cell membrane. The probes selectively respond to APN with ratiometric fluorescence signal changes. A selected probe, which has two-photon imaging capability, allowed us to determine the relative APN levels in various organ tissues for the first time: 4.3 (intestine), 2.1 (kidney), 2.7 (liver), 3.2 (lung), and 1.0 (stomach). Also, a higher APN level was observed from a HepG2-xenograft mouse tissue in comparison with the normal tissue. Furthermore, we observed a significant APN level increase in the mouse liver of a drug (acetaminophen)-induced liver injury model. The probe thus offers a reliable means for studying APN-associated biology including drug-induced hepatotoxicity simply by ratiometric imaging.
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Affiliation(s)
- Yun Jae Yang
- Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, South Korea
| | - Mingchong Dai
- CEDAR, Knight Cancer Institute, School of Medicine, Oregon Health and Science University, Portland, Oregon 97201, United States
| | - Kyo Han Ahn
- Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, South Korea
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14
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Szychta K, Koszarna B, Banasiewicz M, Sobolewski A, O’Mari O, Clark JA, Vullev VI, Barboza CA, Gryko DT. Conformation of the Ester Group Governs the Photophysics of Highly Polarized Benzo[ g]coumarins. JACS AU 2023; 3:1918-1930. [PMID: 37502148 PMCID: PMC10369411 DOI: 10.1021/jacsau.3c00169] [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: 04/05/2023] [Revised: 06/10/2023] [Accepted: 06/13/2023] [Indexed: 07/29/2023]
Abstract
Photosensitizers that display "unusual" emission from upper electronically excited states offer possibilities for initiating higher-energy processes than what the governing Kasha's rule postulates. Achieving conditions for dual fluorescence from multiple states of the same species requires molecular design and conditions that favorably tune the excited-state dynamics. Herein, we switch the position of the electron-donating NMe2 group around the core of benzo[g]coumarins (BgCoum) and tune the electronic coupling and the charge-transfer character of the fluorescent excited states. For solvents with intermediate polarity, three of the four regioisomers exhibit fluorescence from two different excited states with bands that are well separated in the visible and the near-infrared spectral regions. Computational analysis, employing ab initio methods, reveals that the orientation of an ester on the pyrone ring produces two conformers responsible for the observed dual fluorescence. Studies with solid solvating media, which restricts the conformational degrees of freedom, concur with the computational findings. These results demonstrate how "seemingly inconsequential" auxiliary substituents, such as the esters on the pyrone coumarin rings, can have profound effects leading to "anti-Kasha" photophysical behavior important for molecular photonics, materials engineering, and solar-energy science.
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Affiliation(s)
- Kamil Szychta
- Institute
of Organic Chemistry of Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Beata Koszarna
- Institute
of Organic Chemistry of Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Marzena Banasiewicz
- Institute
of Physics of Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland
| | - Andrzej Sobolewski
- Institute
of Physics of Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland
| | - Omar O’Mari
- Department
of Bioengineering, University of California, Riverside, California 92521, United States
| | - John A. Clark
- Department
of Bioengineering, University of California, Riverside, California 92521, United States
| | - Valentine I. Vullev
- Department
of Bioengineering, University of California, Riverside, California 92521, United States
- Department
of Chemistry, Department of Biochemistry, and Materials Science and
Engineering Program, University of California, Riverside, California 92521, United States
| | - Cristina A. Barboza
- Institute
of Physics of Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland
- Department
of Physical and Quantum Chemistry, Faculty of Chemistry, Wroclaw University of Science and Technology, Wrocław 50-370, Poland
| | - Daniel T. Gryko
- Institute
of Organic Chemistry of Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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15
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Bai Y, Zhu B, Oliveria JP, Cannon BJ, Feyaerts D, Bosse M, Vijayaragavan K, Greenwald NF, Phillips D, Schürch CM, Naik SM, Ganio EA, Gaudilliere B, Rodig SJ, Miller MB, Angelo M, Bendall SC, Rovira-Clavé X, Nolan GP, Jiang S. Expanded vacuum-stable gels for multiplexed high-resolution spatial histopathology. Nat Commun 2023; 14:4013. [PMID: 37419873 PMCID: PMC10329015 DOI: 10.1038/s41467-023-39616-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 06/16/2023] [Indexed: 07/09/2023] Open
Abstract
Cellular organization and functions encompass multiple scales in vivo. Emerging high-plex imaging technologies are limited in resolving subcellular biomolecular features. Expansion Microscopy (ExM) and related techniques physically expand samples for enhanced spatial resolution, but are challenging to be combined with high-plex imaging technologies to enable integrative multiscaled tissue biology insights. Here, we introduce Expand and comPRESS hydrOgels (ExPRESSO), an ExM framework that allows high-plex protein staining, physical expansion, and removal of water, while retaining the lateral tissue expansion. We demonstrate ExPRESSO imaging of archival clinical tissue samples on Multiplexed Ion Beam Imaging and Imaging Mass Cytometry platforms, with detection capabilities of > 40 markers. Application of ExPRESSO on archival human lymphoid and brain tissues resolved tissue architecture at the subcellular level, particularly that of the blood-brain barrier. ExPRESSO hence provides a platform for extending the analysis compatibility of hydrogel-expanded biospecimens to mass spectrometry, with minimal modifications to protocols and instrumentation.
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Affiliation(s)
- Yunhao Bai
- Department of Pathology, Stanford University, Stanford, CA, USA
- Department of Chemistry, Stanford University, Stanford, CA, USA
| | - Bokai Zhu
- Department of Pathology, Stanford University, Stanford, CA, USA
- Department of Microbiology and Immunology, Stanford University, Stanford, CA, USA
| | - John-Paul Oliveria
- Department of Translational Medicine, Genentech, Inc., South San Francisco, CA, USA
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Bryan J Cannon
- Department of Pathology, Stanford University, Stanford, CA, USA
| | - Dorien Feyaerts
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University, Stanford, CA, USA
| | - Marc Bosse
- Department of Pathology, Stanford University, Stanford, CA, USA
| | | | | | - Darci Phillips
- Department of Pathology, Stanford University, Stanford, CA, USA
| | - Christian M Schürch
- Department of Pathology, Stanford University, Stanford, CA, USA
- Department of Pathology and Neuropathology, University Hospital and Comprehensive Cancer Center Tübingen, Tübingen, Germany
| | - Samuel M Naik
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Edward A Ganio
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University, Stanford, CA, USA
| | - Brice Gaudilliere
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University, Stanford, CA, USA
| | - Scott J Rodig
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Michael B Miller
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
- Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
- Division of Genetics and Genomics, Department of Pediatrics, Boston Children's Hospital, Boston, MA, USA
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Michael Angelo
- Department of Pathology, Stanford University, Stanford, CA, USA
| | - Sean C Bendall
- Department of Pathology, Stanford University, Stanford, CA, USA
| | - Xavier Rovira-Clavé
- Department of Pathology, Stanford University, Stanford, CA, USA.
- Department of Microbiology and Immunology, Stanford University, Stanford, CA, USA.
| | - Garry P Nolan
- Department of Pathology, Stanford University, Stanford, CA, USA.
| | - Sizun Jiang
- Department of Pathology, Stanford University, Stanford, CA, USA.
- Broad Institute of MIT and Harvard, Cambridge, MA, USA.
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Boston, MA, USA.
- Department of Pathology, Dana Farber Cancer Institute, Boston, MA, USA.
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16
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Johnson RE, Murray MT, Bycraft LJ, Wetmore SD, Manderville RA. A modular aldol approach for internal fluorescent molecular rotor chalcone surrogates for DNA biosensing applications. Chem Sci 2023; 14:4832-4844. [PMID: 37181758 PMCID: PMC10171068 DOI: 10.1039/d3sc00772c] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 04/11/2023] [Indexed: 05/16/2023] Open
Abstract
Fluorescent molecular rotors (FMRs) are critical tools for probing nucleic acid structure and function. Many valuable FMRs have been incorporated into oligonucleotides, although the methods of doing so can be cumbersome. Development of synthetically simple, high yielding modular methods to fine-tune dye performance is crucial to expand the biotechnological applications of oligonucleotides. Herein, we report the utility of 6-hydroxy-indanone (6HI) with a glycol backbone to serve as a handle for on-strand aldehyde capture as a modular aldol approach for site-specific insertion of internal FMR chalcones. Aldol reactions with aromatic aldehydes containing N-donors proceed in high yield to create modified DNA oligonucleotides, which in the duplex match the stability of the fully paired canonical B-form with strong stacking interactions between the planar probe and the flanking base pairs, as evidenced by molecular dynamics (MD) simulations. The FMR chalcones possess remarkable quantum yields (Φfl up to 76%) in duplex DNA, coupled with large Stokes shifts (Δν up to 155 nm), light-up emissions (Irel up to 60-fold) that span the visible region (λem 518-680 nm) with brightness up to 17 480 cm-1 M-1. The library also contains a FRET pair and dual emission probes, suitable for ratiometric sensing. The ease of aldol insertion coupled with the excellent performance of the FMR chalcones permits their future wide-spread use.
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Affiliation(s)
- Ryan E Johnson
- Department of Chemistry & Toxicology, University of Guelph Guelph Ontario N1G 2W1 Canada
| | - Makay T Murray
- Department of Chemistry & Biochemistry, University of Lethbridge Lethbridge Alberta T1K 3M4 Canada
| | - Lucas J Bycraft
- Department of Chemistry & Toxicology, University of Guelph Guelph Ontario N1G 2W1 Canada
| | - Stacey D Wetmore
- Department of Chemistry & Biochemistry, University of Lethbridge Lethbridge Alberta T1K 3M4 Canada
| | - Richard A Manderville
- Department of Chemistry & Toxicology, University of Guelph Guelph Ontario N1G 2W1 Canada
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17
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Trashi I, Durbacz MZ, Trashi O, Wijesundara YH, Ehrman RN, Chiev AC, Darwin CB, Herbert FC, Gadhvi J, De Nisco NJ, Nielsen SO, Gassensmith JJ. Self-assembly of a fluorescent virus-like particle for imaging in tissues with high autofluorescence. J Mater Chem B 2023; 11:4445-4452. [PMID: 37144595 DOI: 10.1039/d3tb00469d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Virus-like particles (VLPs) are engineered nanoparticles that mimic the properties of viruses-like high tolerance to heat and proteases-but lack a viral genome, making them non-infectious. They are easily modified chemically and genetically, making them useful in drug delivery, enhancing vaccine efficacy, gene delivery, and cancer immunotherapy. One such VLP is Qβ, which has an affinity towards an RNA hairpin structure found in its viral RNA that drives the self-assembly of the capsid. It is possible to usurp the native way infectious Qβ self-assembles to encapsidate its RNA to place enzymes inside the VLP's lumen as a protease-resistant cage. Further, using RNA templates that mimic the natural self-assembly of the native capsid, fluorescent proteins (FPs) have been placed inside VLPs in a "one pot" expression system. Autofluorescence in tissues can lead to misinterpretation of results and unreliable science, so we created a single-pot expression system that uses the fluorescent protein smURFP, which avoids autofluorescence and has spectral properties compatible with standard commercial filter sets on confocal microscopes. In this work, we were able to simplify the existing "one-pot" expression system while creating high-yielding fluorescent VLP nanoparticles that could easily be imaged inside lung epithelial tissue.
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Affiliation(s)
- Ikeda Trashi
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, USA.
| | - Mateusz Z Durbacz
- Department of Molecular Biology and Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Orikeda Trashi
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, USA.
| | - Yalini H Wijesundara
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, USA.
| | - Ryanne N Ehrman
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, USA.
| | - Alyssa C Chiev
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, USA.
| | - Cary B Darwin
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, USA.
| | - Fabian C Herbert
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, USA.
| | - Jashkaran Gadhvi
- Department of Biological Science, The University of Texas at Dallas, Richardson, Texas 75080, USA
| | - Nicole J De Nisco
- Department of Biological Science, The University of Texas at Dallas, Richardson, Texas 75080, USA
| | - Steven O Nielsen
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, USA.
| | - Jeremiah J Gassensmith
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, USA.
- Department of Bioengineering, The University of Texas at Dallas, Richardson, Texas 75080, USA
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18
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Ding C, Ren T. Near infrared fluorescent probes for detecting and imaging active small molecules. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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19
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Corridon PR. Capturing effects of blood flow on the transplanted decellularized nephron with intravital microscopy. Sci Rep 2023; 13:5289. [PMID: 37002341 PMCID: PMC10066218 DOI: 10.1038/s41598-023-31747-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 03/16/2023] [Indexed: 04/04/2023] Open
Abstract
Organ decellularization creates cell-free, collagen-based extracellular matrices that can be used as scaffolds for tissue engineering applications. This technique has recently gained much attention, yet adequate scaffold repopulation and implantation remain a challenge. Specifically, there still needs to be a greater understanding of scaffold responses post-transplantation and ways we can improve scaffold durability to withstand the in vivo environment. Recent studies have outlined vascular events that limit organ decellularization/recellularization scaffold viability for long-term transplantation. However, these insights have relied on in vitro/in vivo approaches that need enhanced spatial and temporal resolutions to investigate such issues at the microvascular level. This study uses intravital microscopy to gain instant feedback on their structure, function, and deformation dynamics. Thus, the objective of this study was to capture the effects of in vivo blood flow on the decellularized glomerulus, peritubular capillaries, and tubules after autologous and allogeneic orthotopic transplantation into rats. Large molecular weight dextran molecules labeled the vasculature. They revealed substantial degrees of translocation from glomerular and peritubular capillary tracks to the decellularized tubular epithelium and lumen as early as 12 h after transplantation, providing real-time evidence of the increases in microvascular permeability. Macromolecular extravasation persisted for a week, during which the decellularized microarchitecture was significantly and comparably compromised and thrombosed in both autologous and allogeneic approaches. These results indicate that in vivo multiphoton microscopy is a powerful approach for studying scaffold viability and identifying ways to promote scaffold longevity and vasculogenesis in bioartificial organs.
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Affiliation(s)
- Peter R Corridon
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, UAE.
- Healthcare Engineering Innovation Center, Biomedical Engineering, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, UAE.
- Center for Biotechnology, Khalifa University of Science and Technology, PO Box 127788, Abu Dhabi, UAE.
- Wake Forest Institute for Regenerative Medicine, Medical Center Boulevard, Winston-Salem, NC, 27157-1083, USA.
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20
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Maric D, Corbin L, Greco N, Lorenzo-Redondo R, McRaven MD, Veazey RS, Hope TJ. Temporal and spatial characterization of HIV/SIV infection at anorectal mucosa using rhesus macaque rectal challenge model. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.02.22.529624. [PMID: 36865309 PMCID: PMC9980105 DOI: 10.1101/2023.02.22.529624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
The study described herein is a continuation of our work in which we developed a methodology to identify small foci of transduced cells following rectal challenge of rhesus macaques with a non-replicative luciferase reporter virus. In the current study, the wild-type virus was added to the inoculation mix and twelve rhesus macaques were necropsied 2-4 days after the rectal challenge to study the changes in infected cell phenotype as the infection progressed. Relying on luciferase reporter we noted that both anus and rectum tissues are susceptible to the virus as early as 48h after the challenge. Small regions of the tissue containing luciferase-positive foci were further analyzed microscopically and were found to also contain cells infected by wild-type virus. Phenotypic analysis of the Env and Gag positive cells in these tissues revealed the virus can infect diverse cell populations, including but not limited to Th17 T cells, non Th17 T cells, immature dendritic cells, and myeloid-like cells. The proportions of the infected cell types, however, did not vary much during the first four days of infection when anus and rectum tissues were examined together. Nonetheless, when the same data was analyzed on a tissue-specific basis, we found significant changes in infected cell phenotypes over the course of infection. For anal tissue, a statistically significant increase in infection was observed for Th17 T cells and myeloid-like cells, while in the rectum, the non-Th17 T cells showed the biggest temporal increase, also of statistical significance.
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Affiliation(s)
- Danijela Maric
- Northwestern University Feinberg School of Medicine, Department of Cell and Developmental Biology, Chicago, Illinois, USA
| | - Lisette Corbin
- Northwestern University Feinberg School of Medicine, Department of Cell and Developmental Biology, Chicago, Illinois, USA
- Current affiliation: Emory University School of Medicine, Atlanta, Georgia, USA
| | - Natalie Greco
- Northwestern University Feinberg School of Medicine, Department of Cell and Developmental Biology, Chicago, Illinois, USA
- Current affiliation: Parker Institute for Cancer Immunotherapy, San Francisco, California, USA
| | - Ramon Lorenzo-Redondo
- Northwestern University Feinberg School of Medicine, Department of Medicine, Division of Infectious Diseases, Chicago, Illinois, USA
- Center for Pathogen Genomics and Microbial Evolution, Northwestern University Havey Institute for Global Health, Chicago, Illinois, USA
| | - Michael D. McRaven
- Northwestern University Feinberg School of Medicine, Department of Cell and Developmental Biology, Chicago, Illinois, USA
| | - Ronald S. Veazey
- Tulane National Primate Research Center, Division of Comparative Pathology, Covington, Louisiana, USA
| | - Thomas J. Hope
- Northwestern University Feinberg School of Medicine, Department of Cell and Developmental Biology, Chicago, Illinois, USA
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21
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Tamima U, Sarkar S, Islam MR, Shil A, Kim KH, Reo YJ, Jun YW, Banna H, Lee S, Ahn KH. A Small-Molecule Fluorescence Probe for Nuclear ATP. Angew Chem Int Ed Engl 2023; 62:e202300580. [PMID: 36792537 DOI: 10.1002/anie.202300580] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 02/10/2023] [Accepted: 02/15/2023] [Indexed: 02/17/2023]
Abstract
Fluorescence monitoring of ATP in different organelles is now feasible with a few biosensors developed, which, however, show low sensitivity, limited biocompatibility, and accessibility. Small-molecule ATP probes that alleviate those limitations thus have received much attention recently, leading to a few ATP probes that target several organelles except for the nucleus. We disclose the first small-molecule probe that selectively detects nuclear ATP through reversible binding, with 25-fold fluorescence enhancement at pH 7.4 and excellent selectivity against various biologically relevant species. Using the probe, we observed 2.1-3.3-fold and 3.9-7.8-fold higher nuclear ATP levels in cancerous cell lines and tumor tissues compared with normal cell lines and tissues, respectively, which are explained by the higher nuclear ATP level in the mitosis phase. The probe has great potential for studying nuclear ATP-associated biology.
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Affiliation(s)
- Umme Tamima
- Department of Chemistry, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk, 37673 (Republic of, Korea
| | - Sourav Sarkar
- Department of Chemistry, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk, 37673 (Republic of, Korea
| | - Md Reyazul Islam
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk, 37673 (Republic of, Korea
| | - Anushree Shil
- Department of Chemistry, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk, 37673 (Republic of, Korea
| | - Kyeong Hwan Kim
- Department of Chemistry, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk, 37673 (Republic of, Korea
| | - Ye Jin Reo
- Department of Chemistry, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk, 37673 (Republic of, Korea
| | - Yong Woong Jun
- Department of Chemistry, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk, 37673 (Republic of, Korea
| | - Hasanul Banna
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk, 37673 (Republic of, Korea
| | - Soobin Lee
- Department of Chemistry, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk, 37673 (Republic of, Korea
| | - Kyo Han Ahn
- Department of Chemistry, Pohang University of Science and Technology, 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk, 37673 (Republic of, Korea
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22
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Domena JB, Celebic E, Ferreira BCLB, Zhou Y, Zhang W, Chen J, Bartoli M, Tagliaferro A, Johnson Q, Chauhan BPS, Paulino V, Olivier JH, Leblanc RM. Investigation into Red Emission and Its Applications: Solvatochromic N-Doped Red Emissive Carbon Dots with Solvent Polarity Sensing and Solid-State Fluorescent Nanocomposite Thin Films. Molecules 2023; 28:molecules28041755. [PMID: 36838742 PMCID: PMC9960500 DOI: 10.3390/molecules28041755] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 02/08/2023] [Accepted: 02/10/2023] [Indexed: 02/15/2023] Open
Abstract
In this work, a NIR emitting dye, p-toluenesulfonate (IR-813) was explored as a model precursor to develop red emissive carbon dots (813-CD) with solvatochromic behavior with a red-shift observed with increasing solvent polarity. The 813-CDs produced had emission peaks at 610 and 698 nm, respectively, in water with blue shifts of emission as solvent polarity decreased. Subsequently, 813-CD was synthesized with increasing nitrogen content with polyethyleneimine (PEI) to elucidate the change in band gap energy. With increased nitrogen content, the CDs produced emissions as far as 776 nm. Additionally, a CD nanocomposite polyvinylpyrrolidone (PVP) film was synthesized to assess the phenomenon of solid-state fluorescence. Furthermore, the CDs were found to have electrochemical properties to be used as an additive doping agent for PVP film coatings.
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Affiliation(s)
- Justin B. Domena
- Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA
| | - Ermin Celebic
- Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA
| | | | - Yiqun Zhou
- Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA
| | - Wei Zhang
- Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA
| | - Jiuyan Chen
- Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA
| | - M. Bartoli
- Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy
| | - A. Tagliaferro
- Department of Applied Science and Technology, Politecnico di Torino, 10129 Torino, Italy
| | - Qiaxian Johnson
- Department of Chemistry, William Paterson University of New Jersey, 300 Pompton Rd, Wayne, NJ 07470, USA
| | - Bhanu P. S. Chauhan
- Department of Chemistry, William Paterson University of New Jersey, 300 Pompton Rd, Wayne, NJ 07470, USA
| | - Victor Paulino
- Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA
| | | | - Roger M. Leblanc
- Department of Chemistry, University of Miami, Coral Gables, FL 33146, USA
- Correspondence:
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23
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Sakr N, Glazova O, Shevkova L, Onyanov N, Kaziakhmedova S, Shilova A, Vorontsova MV, Volchkov P. Characterizing and Quenching Autofluorescence in Fixed Mouse Adrenal Cortex Tissue. Int J Mol Sci 2023; 24:ijms24043432. [PMID: 36834842 PMCID: PMC9968082 DOI: 10.3390/ijms24043432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/03/2023] [Accepted: 02/06/2023] [Indexed: 02/11/2023] Open
Abstract
Tissue autofluorescence of fixed tissue sections is a major concern of fluorescence microscopy. The adrenal cortex emits intense intrinsic fluorescence that interferes with signals from fluorescent labels, resulting in poor-quality images and complicating data analysis. We used confocal scanning laser microscopy imaging and lambda scanning to characterize the mouse adrenal cortex autofluorescence. We evaluated the efficacy of tissue treatment methods in reducing the intensity of the observed autofluorescence, such as trypan blue, copper sulfate, ammonia/ethanol, Sudan Black B, TrueVIEWTM Autofluorescence Quenching Kit, MaxBlockTM Autofluorescence Reducing Reagent Kit, and TrueBlackTM Lipofuscin Autofluorescence Quencher. Quantitative analysis demonstrated autofluorescence reduction by 12-95%, depending on the tissue treatment method and excitation wavelength. TrueBlackTM Lipofuscin Autofluorescence Quencher and MaxBlockTM Autofluorescence Reducing Reagent Kit were the most effective treatments, reducing the autofluorescence intensity by 89-93% and 90-95%, respectively. The treatment with TrueBlackTM Lipofuscin Autofluorescence Quencher preserved the specific fluorescence signals and tissue integrity, allowing reliable detection of fluorescent labels in the adrenal cortex tissue. This study demonstrates a feasible, easy-to-perform, and cost-effective method to quench tissue autofluorescence and improve the signal-to-noise ratio in adrenal tissue sections for fluorescence microscopy.
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Affiliation(s)
- Nawar Sakr
- Endocrinology Research Centre, Moscow 117292, Russia
- Genome Engineering Lab, Moscow Institute of Physics and Technology, Dolgoprudniy 141700, Russia
| | - Olga Glazova
- Endocrinology Research Centre, Moscow 117292, Russia
- Genome Engineering Lab, Moscow Institute of Physics and Technology, Dolgoprudniy 141700, Russia
| | - Liudmila Shevkova
- Endocrinology Research Centre, Moscow 117292, Russia
- Genome Engineering Lab, Moscow Institute of Physics and Technology, Dolgoprudniy 141700, Russia
| | - Nikita Onyanov
- Genome Engineering Lab, Moscow Institute of Physics and Technology, Dolgoprudniy 141700, Russia
| | - Samira Kaziakhmedova
- Genome Engineering Lab, Moscow Institute of Physics and Technology, Dolgoprudniy 141700, Russia
| | - Alena Shilova
- Faculty of Medicine, M.V. Lomonosov Moscow State University, 27-1, Lomonosovsky Prospect, Moscow 117192, Russia
| | - Maria V. Vorontsova
- Endocrinology Research Centre, Moscow 117292, Russia
- Genome Engineering Lab, Moscow Institute of Physics and Technology, Dolgoprudniy 141700, Russia
| | - Pavel Volchkov
- Endocrinology Research Centre, Moscow 117292, Russia
- Genome Engineering Lab, Moscow Institute of Physics and Technology, Dolgoprudniy 141700, Russia
- Correspondence:
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24
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Smolen JA, Wooley KL. Fluorescence lifetime image microscopy prediction with convolutional neural networks for cell detection and classification in tissues. PNAS NEXUS 2022; 1:pgac235. [PMID: 36712353 PMCID: PMC9802238 DOI: 10.1093/pnasnexus/pgac235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 10/11/2022] [Indexed: 12/05/2022]
Abstract
Convolutional neural networks (CNNs) and other deep-learning models have proven to be transformative tools for the automated analysis of microscopy images, particularly in the domain of cellular and tissue imaging. These computer-vision models have primarily been applied with traditional microscopy imaging modalities (e.g. brightfield and fluorescence), likely due to the availability of large datasets in these regimes. However, more advanced microscopy imaging techniques could, potentially, allow for improved model performance in various computational histopathology tasks. In this work, we demonstrate that CNNs can achieve high accuracy in cell detection and classification without large amounts of data when applied to histology images acquired by fluorescence lifetime imaging microscopy (FLIM). This accuracy is higher than what would be achieved with regular single or dual-channel fluorescence images under the same settings, particularly for CNNs pretrained on publicly available fluorescent cell or general image datasets. Additionally, generated FLIM images could be predicted from just the fluorescence image data by using a dense U-Net CNN model trained on a subset of ground-truth FLIM images. These U-Net CNN generated FLIM images demonstrated high similarity to ground truth and improved accuracy in cell detection and classification over fluorescence alone when used as input to a variety of commonly used CNNs. This improved accuracy was maintained even when the FLIM images were generated by a U-Net CNN trained on only a few example FLIM images.
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Affiliation(s)
| | - Karen L Wooley
- Departments of Chemistry, Chemical Engineering, and Materials Science and Engineering, Texas A&M University, College Station, TX 77842, USA
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25
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Contribution of autofluorescence from intracellular proteins in multiphoton fluorescence lifetime imaging. Sci Rep 2022; 12:16584. [PMID: 36198710 PMCID: PMC9534927 DOI: 10.1038/s41598-022-20857-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 09/20/2022] [Indexed: 11/08/2022] Open
Abstract
Multiphoton fluorescence lifetime imaging microscopy (MPM-FLIM) is extensively proposed as a non-invasive optical method to study tissue metabolism. The approach is based on recording changes in the fluorescence lifetime attributed to metabolic co-enzymes, of which nicotinamide adenine dinucleotide (NADH) is of major importance. However, intrinsic tissue fluorescence is complex. Particularly when utilizing two-photon excitation, as conventionally employed in MPM. This increases the possibility for spectral crosstalk and incorrect assignment of the origin of the FLIM signal. Here we demonstrate that in keratinocytes, proteins such as keratin may interfere with the signal usually assigned to NADH in MPM-FLIM by contributing to the lifetime component at 1.5 ns. This is supported by a change in fluorescence lifetime distribution in KRT5- and KRT14-silenced cells. Altogether, our results suggest that the MPM-FLIM data originating from cellular autofluorescence is far more complex than previously suggested and that the contribution from other tissue constituents should not be neglected-changing the paradigm for data interpretation in this context.
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26
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Morzan UN, Díaz Mirón G, Grisanti L, González Lebrero MC, Kaminski Schierle GS, Hassanali A. Non-Aromatic Fluorescence in Biological Matter: The Exception or the Rule? J Phys Chem B 2022; 126:7203-7211. [PMID: 36128666 DOI: 10.1021/acs.jpcb.2c04280] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
While in the vast majority of cases fluorescence in biological matter has been attributed to aromatic or conjugated groups, peptides associated with neurodegenerative diseases, such as Alzheimer's, Parkinson's, or Huntington's, have been recently shown to display an intrinsic visible fluorescence even in the absence of aromatic residues. This has called the attention of researchers from many different fields, trying to understand the origin of this peculiar behavior and, at the same time, motivating the search for novel strategies to control the optical properties of new biophotonic materials. Today, after nearly 15 years of its discovery, there is a growing consensus about the mechanism underlying this phenomenon, namely, that electronic interactions between non-optically active molecules can result in supramolecular assemblies that are fluorescent. Despite this progress, many aspects of this phenomenon remain uncharted territory. In this Perspective, we lay down the state-of-the-art in the field highlighting the open questions from both experimental and theoretical fronts in this fascinating emerging area of non-aromatic fluorescence.
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Affiliation(s)
- Uriel N Morzan
- International Centre for Theoretical Physics, Strada Costiera 11, 34151 Trieste, Italy
| | - Gonzalo Díaz Mirón
- Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Universidad de Buenos Aires, C1053 Buenos Aires, Argentina
| | - Luca Grisanti
- Division of Theoretical Physics, Ruđer Bos̆cković Institute, Bijenic̆ka cesta 54, 10000 Zagreb, Croatia
| | - Mariano C González Lebrero
- Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Universidad de Buenos Aires, C1053 Buenos Aires, Argentina
| | | | - Ali Hassanali
- International Centre for Theoretical Physics, Strada Costiera 11, 34151 Trieste, Italy
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27
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Corridon PR. Intravital microscopy datasets examining key nephron segments of transplanted decellularized kidneys. Sci Data 2022; 9:561. [PMID: 36088356 PMCID: PMC9464233 DOI: 10.1038/s41597-022-01685-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 09/07/2022] [Indexed: 12/28/2022] Open
Abstract
AbstractThis study contains intravital microscopy (IVM) data examining the microarchitecture of acellular kidney scaffolds. Acellular scaffolds are cell-free collagen-based matrices derived from native organs that can be used as templates for regenerative medicine applications. This data set contains in vivo assays that evaluate the effectiveness of decellularization and how these acellular nephron compartments perform in the post-transplantation environment. Qualitative and quantitative assessments of scaffold DNA concentrations, tissue fluorescence signals, and structural and functional integrities of decellularized tubular and peritubular capillary segments were acquired and compared to the native (non-transplanted) organ. Cohorts of 2–3-month-old male Sprague Dawley rats were used: non-transplanted (n = 4), transplanted day 0 (n = 4), transplanted day 1 (n = 4), transplanted day 2 (n = 4), and transplanted day 7 (n = 4). Micrographs and supporting measurements are provided to illustrate IVM processes used to perform this study and are publicly available in a data repository to assist scientific reproducibility and extend the use of this powerful imaging application to analyze other scaffold systems.
Measurements(s)
DNA quantification • tissue fluorescence • microvascular leakage • tubular and peritubular capillary integrity
Technology Type(s)
intravital microscopy • multiphoton microscopy • UV-visible spectroscopy
Sample Characterization(s)
rats • native and decellularized kidneys
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28
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Al-Salihi M, Chen Z, Samanta S, Elazab A, Yi R, Wang S, Lin F, Qu J, Liu L. Improving the performance of rapid lifetime determination for wide-field time-gated imaging in live cells. OPTICS EXPRESS 2022; 30:30760-30778. [PMID: 36242174 DOI: 10.1364/oe.454958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 07/08/2022] [Indexed: 06/16/2023]
Abstract
In biological research, rapid wide-field fluorescence lifetime imaging has become an important imaging tool. However, the biological samples with weak fluorescence signals and lower sensitivity often suffer from very low precision in lifetime determinations which restricts its widespread utilization in many bioimaging applications. To address this issue, a method is presented in this paper to substantially enhance the precision of rapid lifetime determination (RLD). It expedites the discrimination of fluorescence lifetimes, even for the weak signals coming from the cells, stained with long-lived biocompatible AIS/ZnS QDs. The proposed method works in two phases. The first phase deals with the systematic noise analysis based on the signal and contrast of the images in a time-gated imaging system, wherein acquiring the high-quality imaging data through optimization of hardware parameters improves the overall system performance. In the second phase, the chosen images are treated using total variation denoising method combined with the Max/Min filtering method for extracting the region of interest to reconstruct the intensity images for RLD. We performed several experiments on live cells to demonstrate the improvements in imaging performance by the systematic optimizations and data treatment. Obtained results demonstrated a great enhancement in signal-to-noise and contrast-to-noise ratios beside witnessing an obvious improvement in RLD for weak signals. This approach can be used not only to improve the quality of time-gated imaging data but also for efficient fluorescence lifetime imaging of live biological samples without compromising imaging speed and light exposure.
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29
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Maleckaitė K, Dodonova-Vaitkūnienė J, Žilėnaitė R, Tumkevičius S, Vyšniauskas A. Red fluorescent BODIPY molecular rotor for high microviscosity environments. Methods Appl Fluoresc 2022; 10. [PMID: 35705104 DOI: 10.1088/2050-6120/ac7943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 06/15/2022] [Indexed: 11/11/2022]
Abstract
Microviscosity has a strong impact for diffusion-controlled processes in biological environments. BODIPY molecular rotors are viscosity-sensitive fluorophores that provide a simple and non-invasive way to visualise microviscosity. Although green fluorescent probes are already well developed for imaging, thick biological samples require longer wavelengths for investigation. This work focuses on the examination of novelβ-substitutedmeso-phenyl-BODIPYs possessing a red emission. We report a new red fluorescent BODIPY-based probe BP-Vinyl-NO2suitable for sensing microviscosity in rigid environments of over 100 000 cP viscosities. Furthermore, we demonstrate that changing the methyl position fromorthotometaon theβ-phenyl-substituted conjugate BP-PH-m2M-NO2redshifts absorbance and fluorescence spectra while maintaining viscosity sensitivity. Finally, we show that nitro-substitution ofmeso-phenyl is a versatile approach to improve the sensitivity to viscosity while suppressing sensitivity to polarity and temperature of such derivatives. In summary, we present two nitro-substituted red fluorescent probes that could be used as lifetime-based microviscosity sensors.
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Affiliation(s)
- Karolina Maleckaitė
- Center of Physical Sciences and Technology, Saulėtekio av. 3, Vilnius, LT-10257, Lithuania
| | - Jelena Dodonova-Vaitkūnienė
- Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko str. 24, Vilnius, LT-03225, Lithuania
| | - Rugilė Žilėnaitė
- Center of Physical Sciences and Technology, Saulėtekio av. 3, Vilnius, LT-10257, Lithuania.,Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko str. 24, Vilnius, LT-03225, Lithuania
| | - Sigitas Tumkevičius
- Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko str. 24, Vilnius, LT-03225, Lithuania
| | - Aurimas Vyšniauskas
- Center of Physical Sciences and Technology, Saulėtekio av. 3, Vilnius, LT-10257, Lithuania.,Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko str. 24, Vilnius, LT-03225, Lithuania
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30
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Elumalai M, Vimalraj S, Chandirasekar S, Ezhumalai N, Kasthuri J, Rajendiran N. N-Cholyl d-Penicilamine Micelles Templated Red Light-Emitting Silver Nanoclusters: Fluorometric Sensor for S 2- Ions and Bioimaging Application Using Zebrafish Model. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:7580-7592. [PMID: 35674287 DOI: 10.1021/acs.langmuir.2c00713] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Red-light-emitting silver nanoclusters (AgNCs) are recently emerged as a promising nanoprobe in the field of biomedical applications, because of their attractive properties, including brightness, luminescence stability, and better biocompatibility. In this report, we have developed highly water-soluble red-light-emitting AgNCs by using N-cholyl d-penicilamine (NCPA) as a biosurfactant at above the critical micelle concentration (CMC) at room temperature. Moreover, the NCPA was initially synthesized by demonstrating the reaction between cholic acid and d-penicilamine via a simple coupling reaction strategy. The primary and secondary critical micellar concentration (CMC) of NCPA surfactant was measured using pyrene (1 × 10-6 M) as a fluorescent probe, and the values were found to be 3.18 and 10.6 mM, respectively. Steady-state fluorescence measurements reveal that the prepared AgNCs shows the excitation and emission maxima at 365 and 672 nm, respectively, with a large Stokes shift (307 nm). The average lifetime measurements and quantum yield of the AgNCs were calculated to be 143.43 ns and 16.34%, respectively. Also, the red luminescent NCPA-templated AgNCs was synthesized in various protic and aprotic polar solvents, among which DMF and DMSO exhibit bright emission at longer wavelength as synthesized in aqueous medium. At higher concentration of AgNO3, bright luminescent and highly stable solid AgNCs was obtained with excitation and emission maxima at 607 and 711 nm, respectively. Furthermore, the synthesized AgNCs has been successfully utilized as a fluorescent probe for selective and sensitive detection of S2- ions at nanomolar level in water samples, showing its potential applicability for the detection of S2- ions in drinking, river, and tap water samples. Finally, toxicity and bioimaging studies of NCPA-templated AgNCs was demonstrated using zebrafish as in vivo model, showing no significant toxicity up to 200 μL/mL. The AgNCs-stained embryos exhibited red fluorescence with high intensity, which shows that AgNCs are stable in a living system.
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Affiliation(s)
- Manikandan Elumalai
- Department of Polymer Science, University of Madras, Guindy Campus, Chennai 600025, Tamil Nadu, India
| | - Selvaraj Vimalraj
- Centre for Biotechnology, Anna University, Guindy, Chennai 600025, Tamil Nadu, India
| | | | - Nishanthi Ezhumalai
- Department of Polymer Science, University of Madras, Guindy Campus, Chennai 600025, Tamil Nadu, India
| | - Jayapalan Kasthuri
- Department of Chemistry, Quaid-E- Millath Government College for Women, Chennai 600002, Tamil Nadu, India
| | - Nagappan Rajendiran
- Department of Polymer Science, University of Madras, Guindy Campus, Chennai 600025, Tamil Nadu, India
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31
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Use of Microscope-Integrated Near-Infrared Fluorescence for Enhancing Deep Lymphatic Vessel Detection during Supermicrosurgical Lymphaticovenous Anastomosis: A Longitudinal Cohort Study. Plast Reconstr Surg 2022; 149:1227-1233. [PMID: 35311756 DOI: 10.1097/prs.0000000000009050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND The default setting of microscope-integrated near-infrared fluorescence (MINIRF) using indocyanine green for locating superficial lymphatic vessels during lymphaticovenous anastomosis was limited to less than or equal to 70 percent intensity. The authors investigated whether maximizing the MINIRF intensity setting could increase the number of deep lymphatic vessels being found, thereby increasing the total number of lymphatic vessels for lymphaticovenous anastomosis. METHODS This longitudinal cohort study enrolled 94 patients (86 female and eight male patients) with lower limb lymphedema. Superficial lymphatic vessels were identified with the MINIRF default setting, before maximal intensity was used for deep lymphatic vessel detection. Primary/secondary endpoints included the number of superficial and deep lymphatic vessels identified. No control was used. Demographic data, intraoperative findings [including superficial and deep (indocyanine green-enhanced and non-indocyanine green-enhanced) lymphatic vessels], and severity of lymphosclerosis were recorded. Data in three regions of the lower limb (i.e., foot/above ankle, below knee, and thigh) were compared. RESULTS A total of 481 lymphatic vessels were identified, comprising 260 superficial and 221 deep lymphatic vessels. The median number of lymphatic vessels found per patient was five (interquartile range, four to six), and the median lymphatic vessel size was 0.63 mm (interquartile range, 0.5 to 0.8 mm). No difference was found in number (p = 0.360), size (p = 0.215), or severity of lymphosclerosis (p = 0.226) between the overall superficial and deep lymphatic vessels in the three lower limb regions. CONCLUSIONS Deep lymphatic vessel detection can be aided by maximizing MINIRF intensity. These deep lymphatic vessels are comparable to superficial lymphatic vessels in number, size, and functionality, making them potentially valuable for lymphedema improvement. CLINICAL QUESTION/LEVEL OF EVIDENCE Diagnostic, II.
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Fine J, McShane MJ, Coté GL. Monte Carlo method for assessment of a multimodal insertable biosensor. JOURNAL OF BIOMEDICAL OPTICS 2022; 27:JBO-210299SSRR. [PMID: 35505461 PMCID: PMC9064117 DOI: 10.1117/1.jbo.27.8.083017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 04/12/2022] [Indexed: 05/25/2023]
Abstract
SIGNIFICANCE Continuous glucose monitors (CGMs) are increasingly utilized as a way to provide healthcare to the over 10% of Americans that have diabetes. Fully insertable and optically transduced biosensors are poised to further improve CGMs by extending the device lifetime and reducing cost. However, optical modeling of light propagation in tissue is necessary to ascertain device performance. AIM Monte Carlo modeling of photon transport through tissue was used to assess the luminescent output of a fully insertable glucose biosensor that uses a multimodal Förster resonance energy transfer competitive binding assay and a phosphorescence lifetime decay enzymatic assay. APPROACH A Monte Carlo simulation framework of biosensor luminescence and tissue autofluorescence was built using MCmatlab. Simulations were first validated against previous research and then applied to predict the response of a biosensor in development. RESULTS Our results suggest that a diode within the safety standards for light illumination on the skin, with far-red excitation, allows the luminescent biosensor to yield emission strong enough to be detectable by a common photodiode. CONCLUSIONS The computational model showed that the expected fluorescent power output of a near-infrared light actuated barcode was five orders of magnitude greater than a visible spectrum excited counterpart biosensor.
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Affiliation(s)
- Jesse Fine
- Texas A&M University, Department of Biomedical Engineering, College Station, Texas, United States
| | - Michael J. McShane
- Texas A&M University, Department of Biomedical Engineering, College Station, Texas, United States
- Texas A&M University, Department of Materials Science and Engineering, College Station, Texas, United States
- Texas A&M University, Center for Remote Health Technologies and Systems, Texas A&M Engineering Experiment Station, College Station, Texas, United States
| | - Gerard L. Coté
- Texas A&M University, Department of Biomedical Engineering, College Station, Texas, United States
- Texas A&M University, Center for Remote Health Technologies and Systems, Texas A&M Engineering Experiment Station, College Station, Texas, United States
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Kielesiński Ł, Deperasińska I, Morawski O, Vygranenko KV, Ouellette ET, Gryko DT. Polarized, V-Shaped, and Conjoined Biscoumarins: From Lack of Dipole Moment Alignment to High Brightness. J Org Chem 2022; 87:5961-5975. [PMID: 35410474 PMCID: PMC9087199 DOI: 10.1021/acs.joc.2c00232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
![]()
Eleven conjoined
coumarins possessing a chromeno[3,4-c]chromene-6,7-dione
skeleton have been synthesized via the reaction
of electron-rich phenols with esters of coumarin-3-carboxylic acids,
catalyzed by either Lewis acids or 4-dimethylaminopyridine. Furthermore,
Michael-type addition to angular benzo[f]coumarins
is possible, leading to conjugated helical systems. Arrangement of
the electron-donating amino groups at diverse positions on this heterocyclic
skeleton makes it possible to obtain π-expanded coumarins with
emission either sensitive to, or entirely independent of, solvent
polarity with large Stokes shifts. Computational studies have provided
a rationale for moderate solvatochromic effects unveiling the lack
of collinearity of the dipole moments in the ground and excited states.
Depending on the functional groups present, the obtained dyes are
highly polarized with dipole moments of ∼14 D in the ground
state and ∼20–25 D in the excited state. Strong emission
in nonpolar solvents, in spite of the inclusion of a NO2 group, is rationalized by the fact that the intramolecular charge
transfer introduced into these molecules is strong enough to suppress
intersystem crossing yet weak enough to prevent the formation of dark
twisted intramolecular charge transfer states. Photochemical transformation
of the dye possessing a chromeno[3,4-c]pyridine-4,5-dione
scaffold led to the formation of a spirocyclic benzo[g]coumarin.
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Affiliation(s)
- Łukasz Kielesiński
- Institute of Organic Chemistry of Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Irena Deperasińska
- Institute of Physics of Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland
| | - Olaf Morawski
- Institute of Physics of Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland
| | - Kateryna V Vygranenko
- Institute of Organic Chemistry of Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Erik T Ouellette
- Department of Chemistry, University of California, Berkeley, 420 Latimer Hall, Berkeley, California 94720, United States.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Daniel T Gryko
- Institute of Organic Chemistry of Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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34
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Han C, Zhang ZH, Wang L, Chen XQ, Qu J, Liu K, Wang JY. Two reasonably designed polarity-viscosity sensitive fluorescent probes with large Stokes shift for lighting up lipid droplets in cells. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2021.113656] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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35
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Jia P, Wang F, Zeng W, Wang Z. A triphenylamine-based aggregation-enhanced emission probe for viscosity and polarity analysis of lubricating oils. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:694-699. [PMID: 35043793 DOI: 10.1039/d1ay01957k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Lubricating oils offers abundant information about the operating state of machines. In this work, a donor-acceptor aggregation-enhanced emission fluorescent molecule, (Z)-4-(1-cyano-2-(4-(diphenylamino)phenyl)vinyl)benzonitrile (CPA-TPA), was synthesized to investigate its function to sense the viscosity and polarity of lubricant base oils. The results indicated that the molecule showed steadily-increased fluorescence emission with the base oil viscosity. In a mixture of poly-α-olefin/ester base oils, its optimal emission gradually red-shifted with the ester oil fraction, i.e., the polarity of the lubricant. A good correlation could be established between the emission intensity of the probe and the oil viscosity or between the optimal emission wavelength and the oil polarity. This demonstrates a dual-response fluorescent probe used for lubricating oil analysis and opens a new opportunity to develop a molecule-based method for the evaluation of lubricating oil quality.
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Affiliation(s)
- Pengxiao Jia
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Fu Wang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.
| | - Wei Zeng
- Key Laboratory of Eco-functional Polymer Materials of the Ministry of Education, Key Laboratory of Eco-environmental Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Zhaofeng Wang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.
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36
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Jun YW, Albarran E, Wilson DL, Ding J, Kool ET. Fluorescence Imaging of Mitochondrial DNA Base Excision Repair Reveals Dynamics of Oxidative Stress Responses. Angew Chem Int Ed Engl 2022; 61:e202111829. [PMID: 34851014 PMCID: PMC8792287 DOI: 10.1002/anie.202111829] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/04/2021] [Indexed: 02/03/2023]
Abstract
Mitochondrial function in cells declines with aging and with neurodegeneration, due in large part to accumulated mutations in mitochondrial DNA (mtDNA) that arise from deficient DNA repair. However, measuring this repair activity is challenging. We employ a molecular approach for visualizing mitochondrial base excision repair (BER) activity in situ by use of a fluorescent probe (UBER) that reacts rapidly with AP sites resulting from BER activity. Administering the probe to cultured cells revealed signals that were localized to mitochondria, enabling selective observation of mtDNA BER intermediates. The probe showed elevated DNA repair activity under oxidative stress, and responded to suppression of glycosylase activity. Furthermore, the probe illuminated the time lag between the initiation of oxidative stress and the initial step of BER. Absence of MTH1 in cells resulted in elevated demand for BER activity upon extended oxidative stress, while the absence of OGG1 activity limited glycosylation capacity.
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Affiliation(s)
- Yong Woong Jun
- Department of Chemistry, ChEM-H Institute, and Stanford Cancer Institute, Stanford University, Stanford, California, 94305, United States
| | - Eddy Albarran
- Department of Neurosurgery, Department of Neurology and Neurological Sciences, and Wu Tsai Neuroscience institute, Stanford University School of Medicine, Stanford, California, 94305, United States
| | - David L. Wilson
- Department of Chemistry, ChEM-H Institute, and Stanford Cancer Institute, Stanford University, Stanford, California, 94305, United States
| | - Jun Ding
- Department of Neurosurgery, Department of Neurology and Neurological Sciences, and Wu Tsai Neuroscience institute, Stanford University School of Medicine, Stanford, California, 94305, United States
| | - Eric T. Kool
- Department of Chemistry, ChEM-H Institute, and Stanford Cancer Institute, Stanford University, Stanford, California, 94305, United States
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37
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Immunomagnetic microscopy of tumor tissues using quantum sensors in diamond. Proc Natl Acad Sci U S A 2022; 119:2118876119. [PMID: 35082154 PMCID: PMC8812536 DOI: 10.1073/pnas.2118876119] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/13/2021] [Indexed: 12/24/2022] Open
Abstract
Histological imaging is essential for the biomedical research and clinical diagnosis of human cancer. Although optical microscopy provides a standard method, it is a persistent goal to develop new imaging methods for more precise histological examination. Here, we use nitrogen-vacancy centers in diamond as quantum sensors and demonstrate micrometer-resolution immunomagnetic microscopy (IMM) for human tumor tissues. We immunomagnetically labeled cancer biomarkers in tumor tissues with magnetic nanoparticles and imaged them in a 400-nm resolution diamond-based magnetic microscope. There is barely magnetic background in tissues, and the IMM can resist the impact of a light background. The distribution of biomarkers in the high-contrast magnetic images was reconstructed as that of the magnetic moment of magnetic nanoparticles by employing deep-learning algorithms. In the reconstructed magnetic images, the expression intensity of the biomarkers was quantified with the absolute magnetic signal. The IMM has excellent signal stability, and the magnetic signal in our samples had not changed after more than 1.5 y under ambient conditions. Furthermore, we realized multimodal imaging of tumor tissues by combining IMM with hematoxylin-eosin staining, immunohistochemistry, or immunofluorescence microscopy in the same tissue section. Overall, our study provides a different histological method for both molecular mechanism research and accurate diagnosis of human cancer.
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38
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Jun YW, Albarran E, Wilson DL, Ding J, Kool ET. Fluorescence Imaging of Mitochondrial DNA Base Excision Repair Reveals Dynamics of Oxidative Stress Responses. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202111829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yong Woong Jun
- Department of Chemistry, ChEM-H Institute, and Stanford Cancer Institute Stanford University Stanford CA 94305 USA
| | - Eddy Albarran
- Department of Neurosurgery Department of Neurology and Neurological Sciences, and Wu Tsai Neuroscience institute Stanford University School of Medicine Stanford CA 94305 USA
| | - David L. Wilson
- Department of Chemistry, ChEM-H Institute, and Stanford Cancer Institute Stanford University Stanford CA 94305 USA
| | - Jun Ding
- Department of Neurosurgery Department of Neurology and Neurological Sciences, and Wu Tsai Neuroscience institute Stanford University School of Medicine Stanford CA 94305 USA
| | - Eric T. Kool
- Department of Chemistry, ChEM-H Institute, and Stanford Cancer Institute Stanford University Stanford CA 94305 USA
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39
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Barth ND, Mendive‐Tapia L, Subiros‐Funosas R, Ghashghaei O, Lavilla R, Maiorino L, He X, Dransfield I, Egeblad M, Vendrell M. A Bivalent Activatable Fluorescent Probe for Screening and Intravital Imaging of Chemotherapy-Induced Cancer Cell Death. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 134:e202113020. [PMID: 38505298 PMCID: PMC10947113 DOI: 10.1002/ange.202113020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Indexed: 11/11/2022]
Abstract
The detection and quantification of apoptotic cells is a key process in cancer research, particularly during the screening of anticancer therapeutics and in mechanistic studies using preclinical models. Intravital optical imaging enables high-resolution visualisation of cellular events in live organisms; however, there are few fluorescent probes that can reliably provide functional readouts in situ without interference from tissue autofluorescence. We report the design and optimisation of the fluorogenic probe Apotracker Red for real-time detection of cancer cell death. The strong fluorogenic behaviour, high selectivity, and excellent stability of Apotracker Red make it a reliable optical reporter for the characterisation of the effects of anticancer drugs in cells in vitro and for direct imaging of chemotherapy-induced apoptosis in vivo in mouse models of breast cancer.
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Affiliation(s)
- Nicole D. Barth
- Centre for Inflammation ResearchThe University of EdinburghUK
| | | | | | - Ouldouz Ghashghaei
- Laboratory of Medicinal ChemistryFaculty of Pharmacy and Institute of Biomedicine (IBUB)University of BarcelonaSpain
| | - Rodolfo Lavilla
- Laboratory of Medicinal ChemistryFaculty of Pharmacy and Institute of Biomedicine (IBUB)University of BarcelonaSpain
| | - Laura Maiorino
- Cold Spring Harbor LaboratoryCold Spring HarborNY11724USA
| | - Xue‐Yan He
- Cold Spring Harbor LaboratoryCold Spring HarborNY11724USA
| | - Ian Dransfield
- Centre for Inflammation ResearchThe University of EdinburghUK
| | - Mikala Egeblad
- Cold Spring Harbor LaboratoryCold Spring HarborNY11724USA
| | - Marc Vendrell
- Centre for Inflammation ResearchThe University of EdinburghUK
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40
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Sarkar S, Shil A, Nandy M, Singha S, Reo YJ, Yang YJ, Ahn KH. Rationally Designed Two-Photon Ratiometric Elastase Probe for Investigating Inflammatory Bowel Disease. Anal Chem 2022; 94:1373-1381. [DOI: 10.1021/acs.analchem.1c04646] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Sourav Sarkar
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Anushree Shil
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Madhurima Nandy
- Department of Life Science, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Subhankar Singha
- Institute of Advanced Studies and Research, JIS University, Kolkata 700091, India
| | - Ye Jin Reo
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Yun Jae Yang
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Kyo Han Ahn
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
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41
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Inoue K, Kawakami R, Murakami M, Nakayama T, Yamamoto S, Inoue K, Tsuda T, Sayama K, Imamura T, Kaneno D, Hadano S, Watanabe S, Niko Y. Synthesis and Photophysical Properties of a New Push–Pull Pyrene Dye with Green-to-Far-red Emission and its Application to Human Cellular and Skin Tissue Imaging. J Mater Chem B 2022; 10:1641-1649. [DOI: 10.1039/d1tb02728j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we discuss a new pyrene-based push–pull dye (PC) and our investigation of its photophysical properties and applicability to biological applications. The newly synthesized dye exhibits highly polarity-sensitive fluorescence over...
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42
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Kim HR, Sarkar S, Ahn KH. A Two-Photon, Ratiometric Sensing Platform Based on a Solid State Luminescent Benzocoumarin: Application to Prolonged Bioimaging of Hydrogen Peroxide. Chem Asian J 2021; 17:e202101317. [PMID: 34962711 DOI: 10.1002/asia.202101317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 12/22/2021] [Indexed: 11/06/2022]
Abstract
Fluorescent probes provide essential tools for studying biological systems. For the prolonged imaging of cellular analytes, the fast clearance of small-molecular probes and products is a matter of concern in the quantitative analysis. The activatable probes that produce insoluble products inside cell can be used for the prolonged imaging, but those with ratiometric imaging capability are rare. We disclose the novel sensing platform that is capable of the prolonged imaging, in addition to ratiometric signaling for the reliable quantitative analysis. Specifically, 3-(pyridin-4-yl)-8-(pyrrolidin-1-yl)-2 H benzo[ g ]chromen-2-one and its pyridinium salt as a dye couple constitute the ratiometric sensing platform. As the former dye produces highly emissive insoluble nanoaggregates inside cells, a fluorescent probe in the latter form, enables prolonged imaging of the target analyte in cells as well as in tissue by two-photon microscopy.
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Affiliation(s)
- Hye Rim Kim
- Pohang University of Science and Technology, chemistry, KOREA, REPUBLIC OF
| | - Sourav Sarkar
- Pohang University of Science and Technology, chemistry, KOREA, REPUBLIC OF
| | - Kyo Han Ahn
- POSTECH, Department of Chemistry, 77 Cheongam-Ro, 790-784, Pohang, KOREA, REPUBLIC OF
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43
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Barth N, Mendive-Tapia L, Subiros-Funosas R, Ghashghaie O, Lavilla R, Maiorino L, He XY, Dransfield I, Egeblad M, Vendrell M. A Bivalent Activatable Fluorescent Probe for Screening and Intravital Imaging of Chemotherapy-induced Cancer Cell Death. Angew Chem Int Ed Engl 2021; 61:e202113020. [PMID: 34762762 PMCID: PMC8991960 DOI: 10.1002/anie.202113020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Indexed: 11/21/2022]
Abstract
The detection and quantification of apoptotic cells is a key process in cancer research, particularly during the screening of anticancer therapeutics and in mechanistic studies using preclinical models. Intravital optical imaging enables high‐resolution visualisation of cellular events in live organisms; however, there are few fluorescent probes that can reliably provide functional readouts in situ without interference from tissue autofluorescence. We report the design and optimisation of the fluorogenic probe Apotracker Red for real‐time detection of cancer cell death. The strong fluorogenic behaviour, high selectivity, and excellent stability of Apotracker Red make it a reliable optical reporter for the characterisation of the effects of anticancer drugs in cells in vitro and for direct imaging of chemotherapy‐induced apoptosis in vivo in mouse models of breast cancer.
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Affiliation(s)
- Nicole Barth
- The University of Edinburgh, Centre for Inflammation Research, UNITED KINGDOM
| | | | | | - Ouldouz Ghashghaie
- University of Barcelona: Universitat de Barcelona, Faculty of Pharmacy, SPAIN
| | - Rodolfo Lavilla
- University of Barcelona: Universitat de Barcelona, Faculty of Pharmacy, UNITED KINGDOM
| | - Laura Maiorino
- Cold Spring Harbor Laboratory, Cold Spring Harbor Laboratory, UNITED STATES
| | - Xue-Yan He
- Cold Spring Harbor Laboratory, Cold Spring Harbor Laboratory, UNITED STATES
| | - Ian Dransfield
- The University of Edinburgh, Centre for inflammation research, UNITED KINGDOM
| | - Mikala Egeblad
- Cold Spring Harbor Laboratory, Cold Spring Harbor Laboratory, UNITED STATES
| | - Marc Vendrell
- University of Edinburgh, Centre for Inflammation Research, 47 Little France Crescent, EH16 4TJ, Edinburgh, UNITED KINGDOM
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44
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Wang Y, Song H, Liu C, Zhang Y, Kong Y, Tang J, Yang Y, Yu C. Confined growth of ZIF-8 in dendritic mesoporous organosilica nanoparticles as bioregulators for enhanced mRNA delivery in vivo. Natl Sci Rev 2021; 8:nwaa268. [PMID: 34691708 PMCID: PMC8363327 DOI: 10.1093/nsr/nwaa268] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 09/30/2020] [Accepted: 10/13/2020] [Indexed: 01/30/2023] Open
Abstract
Zeolitic imidazolate framework-8 (ZIF-8) and its composites have diverse applications. However, ZIF-8-based nanocomposites are mainly used as carriers in biomolecular delivery, with the functions of metal ions and ligands rarely used to modulate the biofunctions. In this work, dendritic mesoporous organosilica nanoparticles (DMONs) with tetrasulfide bond were used to confine ZIF-8 growth partially inside mesopores as a novel nanocomposite for mRNA delivery. Each component in the resultant DMONs-ZIF-8 contributed to mRNA delivery applications, including high loading benefitting from positively charged ZIF-8 and large mesopores of DMONs, endosomal escape promoted by the imidazole ring of ZIF-8, and long-term glutathione depletion mediated by both zinc ions and tetrasulfide bond. Combined together, DMONs-ZIF-8 demonstrated enhanced mRNA translation and better transfection efficiency than commercial products and toxic polymer-modified DMONs in vitro and in vivo.
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Affiliation(s)
- Yue Wang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Hao Song
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Chao Liu
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Ye Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Yueqi Kong
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Jie Tang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Yannan Yang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Chengzhong Yu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
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45
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Wu Q, Feng Z, Hu W. Reduction of autofluorescence in whole adult worms of Schistosoma japonicum for immunofluorescence assay. Parasit Vectors 2021; 14:532. [PMID: 34649608 PMCID: PMC8515762 DOI: 10.1186/s13071-021-05027-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 09/18/2021] [Indexed: 11/10/2022] Open
Abstract
Immunofluorescence assay is one of methods to understand the spatial biology by visualizing localization of biomolecules in cells and tissues. Autofluorescence, as a common phenomenon in organisms, is a background signal interfering the immunolocalization assay of schistosome biomolecules, and may lead to misinterpretation of the biomolecular function. However, applicable method for reducing the autofluorescence in Schistosoma remains unclear. In order to find a suitable method for reducing autofluorescence of schistosomes, different chemical reagents, such as Sudan black B (SBB), trypan blue (TB), copper sulfate (CuSO4), Tris-glycine (Gly), and ammonia/ethanol (AE), at different concentrations and treatment time were tested, and SBB and CuSO4 were verified for the effect of blocking autofluorescence in immunofluorescence to localize the target with anti-SjCRT antibody. By comparing the autofluorescence characteristics of different conditions, it was found that SBB, TB and CuSO4 had a certain degree of reducing autofluorescence effect, and the best effect in females was using 50 mM CuSO4 for 6 h and in males was 0.5% SBB for 6 h. Furthermore, we have applied the optimized conditions to the immunofluorescence of SjCRT protein, and the results revealed that the immunofluorescence signal of SjCRT was clearly visible without autofluorescence interference. We present an effective method to reduce autofluorescence in male and female worm of Schistosoma japonicum for immunofluorescence assay, which could be helpful to better understand biomolecular functions. Our method provides an idea for immunofluorescence assay in other flukes with autofluoresence. ![]()
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Affiliation(s)
- Qunfeng Wu
- State Key Laboratory of Genetic Engineering, Ministry of Education Key Laboratory of Contemporary Anthropology, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, 200438, People's Republic of China
| | - Zheng Feng
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Key Laboratory of Parasite and Vector Biology of the Chinese Ministry of Health, WHO Collaborating Center for Tropical Diseases, Joint Research Laboratory of Genetics and Ecology On Parasite-Host Interaction, Chinese Center for Disease Control and Prevention & Fudan University, Shanghai, 200025, People's Republic of China
| | - Wei Hu
- State Key Laboratory of Genetic Engineering, Ministry of Education Key Laboratory of Contemporary Anthropology, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, 200438, People's Republic of China. .,National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Key Laboratory of Parasite and Vector Biology of the Chinese Ministry of Health, WHO Collaborating Center for Tropical Diseases, Joint Research Laboratory of Genetics and Ecology On Parasite-Host Interaction, Chinese Center for Disease Control and Prevention & Fudan University, Shanghai, 200025, People's Republic of China.
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46
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Kim KH, Kim SJ, Singha S, Yang YJ, Park SK, Ahn KH. Ratiometric Detection of Hypochlorous Acid in Brain Tissues of Neuroinflammation and Maternal Immune Activation Models with a Deep-Red/Near-Infrared Emitting Probe. ACS Sens 2021; 6:3253-3261. [PMID: 34467757 DOI: 10.1021/acssensors.1c00930] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Reactive oxygen species (ROS) produced by an inflammatory response in the brain are associated with various neurological disorders. To investigate ROS-associated neuroinflammatory diseases, fluorescent probes with practicality are in demand. We have investigated hypochlorous acid, an important ROS, in the brain tissues of neuroinflammation and maternal immune activation (MIA) model mice, using a new fluorescent probe. The probe has outstanding features over many known probes, such as providing two bright ratio signals in cells and tissues in deep-red/near-infrared wavelength regions with a large spectral separation, in addition to being strongly fluorescent, photo- and chemo-stable, highly selective and sensitive, fast responding, and biocompatible. We have found that the level of hypochlorous acid in the brain tissue of a neuroinflammatory mouse model was higher (2.7-4.0-fold) compared with that in normal brain tissue. Furthermore, the level of hypochlorous acid in the brain tissue of a MIA mouse model was higher (1.2-1.3-fold) compared with that in the normal brain tissue. The "robust" probe provides a practical tool for studying ROS-associated neurological disorders.
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Affiliation(s)
- Kyeong Hwan Kim
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk 37673, Republic of Korea
| | - Soo Jeong Kim
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk 37673, Republic of Korea
| | - Subhankar Singha
- Institute of Advanced Studies and Research, JIS University, Kolkata 700091, India
| | - Yun Jae Yang
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk 37673, Republic of Korea
| | - Sang Ki Park
- Department of Life Sciences, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk 37673, Republic of Korea
| | - Kyo Han Ahn
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk 37673, Republic of Korea
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47
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Encapsulation of folic acid (vitamin B 9) into sporopollenin microcapsules: Physico-chemical characterisation, in vitro controlled release and photoprotection study. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 128:112271. [PMID: 34474830 DOI: 10.1016/j.msec.2021.112271] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 06/09/2021] [Accepted: 06/21/2021] [Indexed: 02/03/2023]
Abstract
Folic acid (FA) is a crucial vitamin for all living creatures. However, it is susceptible to degradation under pH, heat, ultraviolet (UV) and day sunlight conditions, resulting in lowering its bioavailability. Therefore, a versatile protective encapsulation system for FA is highly required to overcome its inherent instability. We report the use of the robust Lycopodium clavatum sporopollenin (LCS) microcapsules, extracted from their natural micrometer-sized raw spores, for FA microencapsulation. The physico-chemical characterisation of the LCS microcapsules are comprehensively investigated before and after the microencapsulation using SEM, elemental, CLSM, FTIR, TGA/DTG and XRD analyses, revealing a successful FA encapsulation within the LCS in an amorphous form. The phenylpropanoid acids, responsible for the UV protection and the autofluorescence of the LCS, were found in the LCS as evidenced by FTIR analysis. TGA/DTG results revealed that the hemi-cellulose and cellulose are the major component of the LCS. A controlled and sustained release of FA from FA-loaded LCS were achieved where the release profile of FA-loaded LCS was found to be pH-dependent. The percentages of cumulative FA released after 10 h at 37 ± 0.5 °C were 45.5% and 76.1% in pH 1.2 and 7.4, respectively, ensuring controlled and slow release in simulated physiological conditions. The FA release kinetic studies indicated the prevalence of the Fickian diffusion mechanism in pH 1.2, while anomalous non-Fickian transport was ascribed for FA release in pH 7.4. The in vitro cytotoxicity assay revealed that the obtained formulations were biocompatible against the human skin fibroblast (HSF) cell line. The versatile LCS microcapsules exhibited intriguing photostability for FA under UV or sunlight irradiation. Concretely, the obtained FA sustained delivery and photoprotection properties of these LCS microcapsules validate their multifunctional characteristics, opening up intriguing applications in oral and topical drug delivery as well as in food industry.
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48
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Hanif S, Muhammad P, Niu Z, Ismail M, Morsch M, Zhang X, Li M, Shi B. Nanotechnology‐Based Strategies for Early Diagnosis of Central Nervous System Disorders. ADVANCED NANOBIOMED RESEARCH 2021. [DOI: 10.1002/anbr.202100008] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- Sumaira Hanif
- Henan-Macquarie University Joint Centre for Biomedical Innovation School of Life Sciences Henan University Kaifeng Henan 475004 China
| | - Pir Muhammad
- Henan-Macquarie University Joint Centre for Biomedical Innovation School of Life Sciences Henan University Kaifeng Henan 475004 China
| | - Zheng Niu
- Province's Key Lab of Brain Targeted Bionanomedicine School of Pharmacy Henan University Kaifeng Henan 475004 China
| | - Muhammad Ismail
- Henan-Macquarie University Joint Centre for Biomedical Innovation School of Life Sciences Henan University Kaifeng Henan 475004 China
| | - Marco Morsch
- Department of Biomedical Sciences Macquarie University Centre for Motor Neuron Disease Research Macquarie University NSW 2109 Australia
| | - Xiaoju Zhang
- Department of Respiratory and Critical Care Medicine Henan Provincial People's Hospital Zhengzhou Henan 450003 China
| | - Mingqiang Li
- Laboratory of Biomaterials and Translational Medicine The Third Affiliated Hospital Sun Yat-sen University Guangzhou Guangdong 510630 China
| | - Bingyang Shi
- Department of Biomedical Sciences Faculty of Medicine & Health & Human Sciences Macquarie University NSW 2109 Australia
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49
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Th17 T cells and immature dendritic cells are the preferential initial targets after rectal challenge with an SIV-based replication-defective dual-reporter vector. J Virol 2021; 95:e0070721. [PMID: 34287053 DOI: 10.1128/jvi.00707-21] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Understanding the earliest events of HIV sexual transmission is critical to develop and optimize HIV prevention strategies. To gain insights into the earliest steps of HIV rectal transmission, including cellular targets, rhesus macaques were intra-rectally challenged with a single-round SIV-based dual reporter that expresses luciferase and iRFP670 upon productive transduction. The vector was pseudotyped with the HIV-1 envelope JRFL. Regions of tissue containing foci of luminescent, transduced cells were identified macroscopically using an in vivo imaging system, and individual transduced cells expressing fluorescent protein were identified and phenotyped microscopically. This system revealed that anal and rectal tissues are both susceptible to transduction 48 hours after the rectal challenge. Detailed phenotypic analysis revealed that on average, 62% of transduced cells are CCR6+ T cells-the vast majority of which express RORγT, a Th17 lineage-specific transcription factor. The second most common target cells were immature dendritic cells at 20%. These two cell types were transduced at the rates that are four to five times higher than their relative abundances indicate. Our work demonstrates that Th17 T and immature dendritic cells are preferential initial targets of HIV/SIV rectal transmission. IMPORTANCE Men and women who participate in unprotected receptive anal intercourse are at high risk for acquiring HIV. While in vitro data have developed a framework for understanding HIV cell tropism, the initial target cells in the rectal mucosa have not been identified. In this study, we identify these early host cells by using an innovative rhesus macaque rectal challenge model and methodology, which we previously developed. Thus, by shedding light on these early HIV/SIV transmission events, this study provides a specific cellular target for future prevention strategies.
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50
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Li JM, Wang KR. Universal colorful staining of cancer tissues and normal tissues for histological diagnosis. Analyst 2021; 146:4446-4449. [PMID: 34152352 DOI: 10.1039/d1an00570g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The versatility of multicolor imaging of human tissues based on staining with perylene monoimide-mannose conjugates PMI-Man and co-staining with PMI-Man and eosin (P&E) was investigated for human cancer and normal tissues. Staining with PMI-Man or co-staining with PMI-Man and eosin showed a perfect histological morphology both in confocal fluorescence microscopy and light microscopy. This approach provided a universal colorful staining method for cancer tissues and normal tissues.
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Affiliation(s)
- Jin-Mei Li
- Department of Pathology, The First Central Hospital of Baoding, Baoding, 071000, China
| | - Ke-Rang Wang
- College of chemistry and environmental science, Hebei University, Baoding, 071002, P. R. China. and Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, Hebei University, Baoding, 071002, P. R. China
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