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Booth E, Garre M, Wu D, Daly HC, O’Shea DF. A NIR-Fluorochrome for Live Cell Dual Emission and Lifetime Tracking from the First Plasma Membrane Interaction to Subcellular and Extracellular Locales. Molecules 2024; 29:2474. [PMID: 38893352 PMCID: PMC11174088 DOI: 10.3390/molecules29112474] [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: 04/19/2024] [Revised: 05/15/2024] [Accepted: 05/22/2024] [Indexed: 06/21/2024] Open
Abstract
Molecular probes with the ability to differentiate between subcellular variations in acidity levels remain important for the investigation of dynamic cellular processes and functions. In this context, a series of cyclic peptide and PEG bio-conjugated dual near-infrared emissive BF2-azadipyrromethene fluorophores with maxima emissions at 720 nm (at pH > 6) and 790 nm (at pH < 5) have been developed and their aqueous solution photophysical properties determined. Their inter-converting emissions and fluorescence lifetime characteristics were exploited to track their spatial and temporal progression from first contact with the plasma membrane to subcellular locales to their release within extracellular vesicles. A pH-dependent reversible phenolate/phenol interconversion on the fluorophore controlled the dynamic changes in dual emission responses and corresponding lifetime changes. Live-cell confocal microscopy experiments in the metastatic breast cancer cell line MDA-MB-231 confirmed the usability of the dual emissive properties for imaging over prolonged periods. All three derivatives performed as probes capable of real-time continuous imaging of fundamental cellular processes such as plasma membrane interaction, tracking endocytosis, lysosomal/large acidic vesicle accumulation, and efflux within extracellular vesicles without perturbing cellular function. Furthermore, fluorescence lifetime imaging microscopy provided valuable insights regarding fluorophore progression through intracellular microenvironments over time. Overall, the unique photophysical properties of these fluorophores show excellent potential for their use as information-rich probes.
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Affiliation(s)
| | | | | | | | - Donal F. O’Shea
- Department of Chemistry, Royal College of Surgeons in Ireland (RCSI), D02 PN40 Dublin, Ireland
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2
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Khan MF, Emma K, O'Brien E, Galvin D, Walsh T, Cahill RA. NIR-ICG identification of ureters during complex colorectal and gynaecological operations: How to do it! - A video vignette. Colorectal Dis 2023; 25:528-529. [PMID: 36239664 DOI: 10.1111/codi.16374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 09/30/2022] [Indexed: 02/08/2023]
Affiliation(s)
- Mohammad F Khan
- UCD Centre for Precision Surgery, University College Dublin, Dublin, Ireland
| | - Kearns Emma
- UCD Centre for Precision Surgery, University College Dublin, Dublin, Ireland
| | - Ellen O'Brien
- Department of Urological Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
| | - David Galvin
- Department of Urological Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
| | - Tom Walsh
- Department of Gynaecological Oncology, Mater Misericordiae University Hospital, Dublin, Ireland
| | - Ronan A Cahill
- UCD Centre for Precision Surgery, University College Dublin, Dublin, Ireland
- Department of Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
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3
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BF 2-Azadipyrromethene Fluorophores for Intraoperative Vital Structure Identification. Molecules 2023; 28:molecules28052167. [PMID: 36903411 PMCID: PMC10004488 DOI: 10.3390/molecules28052167] [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: 02/12/2023] [Revised: 02/21/2023] [Accepted: 02/23/2023] [Indexed: 03/03/2023] Open
Abstract
A series of mono- and bis-polyethylene glycol (PEG)-substituted BF2-azadipyrromethene fluorophores have been synthesized with emissions in the near-infrared region (700-800 nm) for the purpose of fluorescence guided intraoperative imaging; chiefly ureter imaging. The Bis-PEGylation of fluorophores resulted in higher aqueous fluorescence quantum yields, with PEG chain lengths of 2.9 to 4.6 kDa being optimal. Fluorescence ureter identification was possible in a rodent model with the preference for renal excretion notable through comparative fluorescence intensities from the ureters, kidneys and liver. Ureteral identification was also successfully performed in a larger animal porcine model under abdominal surgical conditions. Three tested doses of 0.5, 0.25 and 0.1 mg/kg all successfully identified fluorescent ureters within 20 min of administration which was sustained up to 120 min. 3-D emission heat map imaging allowed the spatial and temporal changes in intensity due to the distinctive peristaltic waves of urine being transferred from the kidneys to the bladder to be identified. As the emission of these fluorophores could be spectrally distinguished from the clinically-used perfusion dye indocyanine green, it is envisaged that their combined use could be a step towards intraoperative colour coding of different tissues.
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4
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Sonkaya Ö, Soylukan C, Pamuk Algi M, Algi F. Aza-BODIPY-based Fluorescent and Colorimetric Sensors and Probes. Curr Org Synth 2023; 20:20-60. [PMID: 35170414 DOI: 10.2174/1570179419666220216123033] [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: 09/02/2021] [Revised: 11/30/2021] [Accepted: 12/18/2021] [Indexed: 12/16/2022]
Abstract
Aza-boron-dipyrromethenes (Aza-BODIPYs) represent an important class of chromophores absorbing and emitting in the near-infrared (NIR) region. They have unique optical and electronic features and higher physiological and photo stability than other NIR dyes. Especially after the development of facile synthetic routes, Aza-BODIPYs have become indispensable fluors that can find various applications ranging from chemosensors, bioimaging, phototherapy, solar energy materials, photocatalysis, photon upconversion, lasers, and optoelectronics. Herein, we review Aza-BODIPY based fluorescent and colorimetric chemosensors. We show the potential and untapped toolbox of Aza-BODIPY based fluorescent and colorimetric chemosensors. Hence, we divide the fluorescent and colorimetric chemosensors and probes into five sections according to the target analytes. The first section begins with the chemosensors developed for pH. Next, we discuss Aza-BODIPY based ion sensors, including metal ions and anions. Finally, we present the chemosensors and probes concerning reactive oxygen (ROS) and nitrogen species (RNS) along with biologically relevant species in the last two sections. We believe that Aza-BODIPYs are still in their infancy, and they have a promising future for translation from the bench to real biomedical and materials science applications. After two decades of intensive research, it seems that there are many more to come in this already fertile field. Overall, we hope that future work will further expand the applications of Aza-BODIPY in many areas.
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Affiliation(s)
- Ömer Sonkaya
- Department of Chemistry, Aksaray University, TR-68100 Aksaray, Turkey
- ASUBTAM Memduh Bilmez BioNanoTech Lab., Aksaray University, TR-68100 Aksaray, Turkey
| | - Caner Soylukan
- ASUBTAM Memduh Bilmez BioNanoTech Lab., Aksaray University, TR-68100 Aksaray, Turkey
- Department of Biotechnology & ASUBTAM Memduh Bilmez BioNanoTech Lab., Aksaray University, TR-68100 Aksaray, Turkey
| | - Melek Pamuk Algi
- Department of Chemistry, Aksaray University, TR-68100 Aksaray, Turkey
- ASUBTAM Memduh Bilmez BioNanoTech Lab., Aksaray University, TR-68100 Aksaray, Turkey
| | - Fatih Algi
- ASUBTAM Memduh Bilmez BioNanoTech Lab., Aksaray University, TR-68100 Aksaray, Turkey
- Department of Biotechnology & ASUBTAM Memduh Bilmez BioNanoTech Lab., Aksaray University, TR-68100 Aksaray, Turkey
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5
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Netufo O, Connor K, Shiels LP, Sweeney KJ, Wu D, O’Shea DF, Byrne AT, Miller IS. Refining Glioblastoma Surgery through the Use of Intra-Operative Fluorescence Imaging Agents. Pharmaceuticals (Basel) 2022; 15:550. [PMID: 35631376 PMCID: PMC9143023 DOI: 10.3390/ph15050550] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 04/22/2022] [Accepted: 04/25/2022] [Indexed: 02/01/2023] Open
Abstract
Glioblastoma (GBM) is the most aggressive adult brain tumour with a dismal 2-year survival rate of 26-33%. Maximal safe resection plays a crucial role in improving patient progression-free survival (PFS). Neurosurgeons have the significant challenge of delineating normal tissue from brain tumour to achieve the optimal extent of resection (EOR), with 5-Aminolevulinic Acid (5-ALA) the only clinically approved intra-operative fluorophore for GBM. This review aims to highlight the requirement for improved intra-operative imaging techniques, focusing on fluorescence-guided imaging (FGS) and the use of novel dyes with the potential to overcome the limitations of current FGS. The review was performed based on articles found in PubMed an.d Google Scholar, as well as articles identified in searched bibliographies between 2001 and 2022. Key words for searches included 'Glioblastoma' + 'Fluorophore'+ 'Novel' + 'Fluorescence Guided Surgery'. Current literature has favoured the approach of using targeted fluorophores to achieve specific accumulation in the tumour microenvironment, with biological conjugates leading the way. These conjugates target specific parts overexpressed in the tumour. The positive results in breast, ovarian and colorectal tissue are promising and may, therefore, be applied to intracranial neoplasms. Therefore, this design has the potential to produce favourable results in GBM by reducing the residual tumour, which translates to decreased tumour recurrence, morbidity and ultimately, mortality in GBM patients. Several preclinical studies have shown positive results with targeted dyes in distinguishing GBM cells from normal brain parenchyma, and targeted dyes in the Near-Infrared (NIR) emission range offer promising results, which may be valuable future alternatives.
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Affiliation(s)
- Oluwakanyinsolami Netufo
- Precision Cancer Medicine Group, Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, 2, D02 YN77 Dublin, Ireland; (O.N.); (K.C.); (L.P.S.); (K.J.S.); (A.T.B.)
| | - Kate Connor
- Precision Cancer Medicine Group, Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, 2, D02 YN77 Dublin, Ireland; (O.N.); (K.C.); (L.P.S.); (K.J.S.); (A.T.B.)
| | - Liam P. Shiels
- Precision Cancer Medicine Group, Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, 2, D02 YN77 Dublin, Ireland; (O.N.); (K.C.); (L.P.S.); (K.J.S.); (A.T.B.)
| | - Kieron J. Sweeney
- Precision Cancer Medicine Group, Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, 2, D02 YN77 Dublin, Ireland; (O.N.); (K.C.); (L.P.S.); (K.J.S.); (A.T.B.)
- National Centre for Neurosurgery, Beaumont Hospital, 9, D09 V2N0 Dublin, Ireland
| | - Dan Wu
- Department of Chemistry, Royal College of Surgeons in Ireland (RCSI), 2, D02 YN77 Dublin, Ireland; (D.W.); (D.F.O.)
| | - Donal F. O’Shea
- Department of Chemistry, Royal College of Surgeons in Ireland (RCSI), 2, D02 YN77 Dublin, Ireland; (D.W.); (D.F.O.)
| | - Annette T. Byrne
- Precision Cancer Medicine Group, Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, 2, D02 YN77 Dublin, Ireland; (O.N.); (K.C.); (L.P.S.); (K.J.S.); (A.T.B.)
- National Pre-Clinical Imaging Centre (NPIC), 2, D02 YN77 Dublin, Ireland
| | - Ian S. Miller
- Precision Cancer Medicine Group, Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, 2, D02 YN77 Dublin, Ireland; (O.N.); (K.C.); (L.P.S.); (K.J.S.); (A.T.B.)
- National Pre-Clinical Imaging Centre (NPIC), 2, D02 YN77 Dublin, Ireland
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6
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Hardy NP, Mac Aonghusa P, Neary PM, Cahill RA. Intraprocedural Artificial Intelligence for Colorectal Cancer Detection and Characterisation in Endoscopy and Laparoscopy. Surg Innov 2021; 28:768-775. [PMID: 33634722 PMCID: PMC8647474 DOI: 10.1177/1553350621997761] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In this article, we provide an evidence-based primer of current tools and evolving concepts in the area of intraprocedural artificial intelligence (AI) methods in colonoscopy and laparoscopy as a 'procedure companion', with specific focus on colorectal cancer recognition and characterisation. These interventions are both likely beneficiaries from an impending rapid phase in technical and technological evolution. The domains where AI is most likely to impact are explored as well as the methodological pitfalls pertaining to AI methods. Such issues include the need for large volumes of data to train AI systems, questions surrounding false positive rates, explainability and interpretability as well as recent concerns surrounding instabilities in current deep learning (DL) models. The area of biophysics-inspired models, a potential remedy to some of these pitfalls, is explored as it could allow our understanding of the fundamental physiological differences between tissue types to be exploited in real time with the help of computer-assisted interpretation. Right now, such models can include data collected from dynamic fluorescence imaging in surgery to characterise lesions by their biology reducing the number of cases needed to build a reliable and interpretable classification system. Furthermore, instead of focussing on image-by-image analysis, such systems could analyse in a continuous fashion, more akin to how we view procedures in real life and make decisions in a manner more comparable to human decision-making. Synergistical approaches can ensure AI methods usefully embed within practice thus safeguarding against collapse of this exciting field of investigation as another 'boom and bust' cycle of AI endeavour.
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Affiliation(s)
- Niall P Hardy
- UCD Centre for Precision Surgery, School of
Medicine, University College Dublin, Dublin, Ireland
| | | | - Peter M Neary
- Department of Surgery, University College
Cork, University Hospital Waterford, Waterford, Ireland
| | - Ronan A Cahill
- UCD Centre for Precision Surgery, School of
Medicine, University College Dublin, Dublin, Ireland
- Department of Surgery, Mater Misericordiae University
Hospital, Dublin, Ireland
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7
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Lei B, Pan H, Zhang Y, Ren XK, Chen Z. An amphiphilic B,O-chelated aza-BODIPY dye: synthesis, pH-sensitivity, and aggregation behaviour in a H 2O/DMSO mixed solvent. Org Biomol Chem 2021; 19:6108-6114. [PMID: 34160530 DOI: 10.1039/d1ob00746g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A novel amphiphilic B,O-chelated azadipyrromethene (aza-BODIPY) dye, containing hydrophobic dodecyloxy groups and hydrophilic tetraethylene glycol (TEG) chains, was synthesized and characterized by NMR, HRMS, Vis/NIR absorption and fluorescence spectroscopy. The B,O-chelated dye 1 exhibited largely bathochromically shifted NIR absorption and fluorescence spectra in comparison with common BF2-chelated aza-BODIPY dyes. Upon gradual addition of trifluoroacetic acid (TFA) to the dye 1 solution, obvious spectral changes were observed in Vis/NIR absorption and fluorescence spectroscopy measurements. Meanwhile, the colour change of the dye 1 solution from pink to blue was noticeable by the naked eye, indicating the pH-sensitivity of dye 1. The pH-sensitivity of dye 1 under acidic conditions could be ascribed to the formation of dye species 2·H+. Furthermore, owing to the amphiphilic feature of dye 1, it self-assembled into J-type aggregates in a mixed solvent of water/DMSO (2/8, v/v). Temperature-dependent Vis/NIR spectroscopic studies revealed a cooperative aggregation process of dye 1 and a nanowire-like morphology of the nanoaggregates was observed by AFM.
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Affiliation(s)
- Bin Lei
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China.
| | - Hongfei Pan
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China.
| | - Yongjie Zhang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China.
| | - Xiang-Kui Ren
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China. and Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin), Tianjin University, Tianjin, 300072, China
| | - Zhijian Chen
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China. and Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin), Tianjin University, Tianjin, 300072, China
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8
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Conway-Kenny R, Ferrer-Ugalde A, Careta O, Cui X, Zhao J, Nogués C, Núñez R, Cabrera-González J, Draper SM. Ru(ii) and Ir(iii) phenanthroline-based photosensitisers bearing o-carborane: PDT agents with boron carriers for potential BNCT. Biomater Sci 2021; 9:5691-5702. [PMID: 34264257 DOI: 10.1039/d1bm00730k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Four novel transition metal-carborane photosensitisers were prepared by Sonogashira cross-coupling of 1-(4-ethynylbenzyl)-2-methyl-o-carborane (A-CB) with halogenated Ru(ii)- or Ir(iii)-phenanthroline complexes. The resulting boron-rich complexes with one (RuCB and IrCB) or two carborane cages (RuCB2 and IrCB2) were spectroscopically characterised, and their photophysical properties investigated. RuCB displayed the most attractive photophysical properties in solution (λem 635 nm, τT 2.53 μs, and φp 20.4%). Nanosecond time-resolved transient absorption studies were used to explore the 3MLCT nature of the triplet excited states, and the highest singlet oxygen quantum yields (ΦΔ) were obtained for the mono-carborane-phenanthroline complexes (RuCB: 52% and IrCB: 25%). None of the complexes produce dark toxicity in SKBR-3 cells after incubation under photodynamic therapy (PDT) conditions. Remarkably, mono-carboranes RuCB and IrCB were the best internalised by the SKBR-3 cells, demonstrating the first examples of tris-bidentate transition metal-carborane complexes acting as triplet photosensitisers for PDT with a high photoactivity; RuCB or IrCB killed ∼50% of SKBR-3 cells at 10 μM after irradiation. Therefore, the high-boron content and the photoactive properties of these photosensitisers make them potential candidates as dual anti-cancer agents for PDT and Boron Neutron Capture Therapy (BNCT).
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Affiliation(s)
- Robert Conway-Kenny
- School of Chemistry, Trinity College Dublin, College Green, Dublin 2, Ireland.
| | - Albert Ferrer-Ugalde
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193-Bellatera, Barcelona, Spain
| | - Oriol Careta
- Departament de Biologia Cellular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain.
| | - Xiaoneng Cui
- School of Chemistry, Trinity College Dublin, College Green, Dublin 2, Ireland. and State Key Laboratory of Fine Chemicals, Dalian University of Technology, E208 Western Campus, 2 Ling-Gong Road, Dalian 116012, P. R. China
| | - Jianzhang Zhao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, E208 Western Campus, 2 Ling-Gong Road, Dalian 116012, P. R. China
| | - Carme Nogués
- Departament de Biologia Cellular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, E-08193-Bellaterra, Barcelona, Spain.
| | - Rosario Núñez
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193-Bellatera, Barcelona, Spain
| | | | - Sylvia M Draper
- School of Chemistry, Trinity College Dublin, College Green, Dublin 2, Ireland.
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9
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Hardy NP, Dalli J, Mac Aonghusa P, Neary PM, Cahill RA. Biophysics inspired artificial intelligence for colorectal cancer characterization. Artif Intell Gastroenterol 2021; 2:77-84. [DOI: 10.35712/aig.v2.i3.77] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 05/21/2021] [Accepted: 06/18/2021] [Indexed: 02/06/2023] Open
Abstract
Over the last ten years artificial intelligence (AI) methods have begun to pervade even the most common everyday tasks such as email filtering and mobile banking. While the necessary quality and safety standards may have understandably slowed the introduction of AI to healthcare when compared with other industries, we are now beginning to see AI methods becoming more available to the clinician in select settings. In this paper we discuss current AI methods as they pertain to gastrointestinal procedures including both gastroenterology and gastrointestinal surgery. The current state of the art for polyp detection in gastroenterology is explored with a particular focus on deep leaning, its strengths, as well as some of the factors that may limit its application to the field of surgery. The use of biophysics (utilizing physics to study and explain biological phenomena) in combination with more traditional machine learning is also discussed and proposed as an alternative approach that may solve some of the challenges associated with deep learning. Past and present uses of biophysics inspired AI methods, such as the use of fluorescence guided surgery to aid in the characterization of colorectal lesions, are used to illustrate the role biophysics-inspired AI can play in the exciting future of the gastrointestinal proceduralist.
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Affiliation(s)
- Niall P Hardy
- UCD Centre for Precision Surgery, Dublin 7 D07 Y9AW, Ireland
| | - Jeffrey Dalli
- UCD Centre for Precision Surgery, Dublin 7 D07 Y9AW, Ireland
| | | | - Peter M Neary
- Department of Surgery, University Hospital Waterford, University College Cork, Waterford X91 ER8E, Ireland
| | - Ronan A Cahill
- UCD Centre for Precision Surgery, Dublin 7 D07 Y9AW, Ireland
- Department of Surgery, Mater Misericordiae University Hospital (MMUH), Dublin 7, Ireland
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10
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Digital dynamic discrimination of primary colorectal cancer using systemic indocyanine green with near-infrared endoscopy. Sci Rep 2021; 11:11349. [PMID: 34059705 PMCID: PMC8167125 DOI: 10.1038/s41598-021-90089-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 04/29/2021] [Indexed: 02/03/2023] Open
Abstract
As indocyanine green (ICG) with near-infrared (NIR) endoscopy enhances real-time intraoperative tissue microperfusion appreciation, it may also dynamically reveal neoplasia distinctively from normal tissue especially with video software fluorescence analysis. Colorectal tumours of patients were imaged mucosally following ICG administration (0.25 mg/kg i.v.) using an endo-laparoscopic NIR system (PINPOINT Endoscopic Fluorescence System, Stryker) including immediate, continuous in situ visualization of rectal lesions transanally for up to 20 min. Spot and dynamic temporal fluorescence intensities (FI) were quantified using ImageJ (including videos at one frame/second, fps) and by a bespoke MATLAB® application that provided digitalized video tracking and signal logging at 30fps (Fluorescence Tracker App downloadable via MATLAB® file exchange). Statistical analysis of FI-time plots compared tumours (benign and malignant) against control during FI curve rise, peak and decline from apex. Early kinetic FI signal measurement delineated discriminative temporal signatures from tumours (n = 20, 9 cancers) offering rich data for analysis versus delayed spot measurement (n = 10 cancers). Malignant lesion dynamic curves peaked significantly later with a shallower gradient than normal tissue while benign lesions showed significantly greater and faster intensity drop from apex versus cancer. Automated tracker quantification efficiently expanded manual results and provided algorithmic KNN clustering. Photobleaching appeared clinically irrelevant. Analysis of a continuous stream of intraoperatively acquired early ICG fluorescence data can act as an in situ tumour-identifier with greater detail than later snapshot observation alone. Software quantification of such kinetic signatures may distinguish invasive from non-invasive neoplasia with potential for real-time in silico diagnosis.
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11
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Curtin N, Wu D, Cahill R, Sarkar A, Aonghusa PM, Zhuk S, Barberio M, Al-Taher M, Marescaux J, Diana M, O'Shea DF. Dual Color Imaging from a Single BF 2-Azadipyrromethene Fluorophore Demonstrated in vivo for Lymph Node Identification. Int J Med Sci 2021; 18:1541-1553. [PMID: 33746570 PMCID: PMC7976573 DOI: 10.7150/ijms.52816] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 12/23/2020] [Indexed: 12/17/2022] Open
Abstract
Dual emissions at ~700 and 800 nm have been achieved from a single NIR-AZA fluorophore 1 by establishing parameters in which it can exist in either its isolated molecular or aggregated states. Dual near infrared (NIR) fluorescence color lymph node (LN) mapping with 1 was achieved in a large-animal porcine model, with injection site, channels and nodes all detectable at both 700 and 800 nm using a preclinical open camera system. The fluorophore was also compatible with imaging using two clinical instruments for fluorescence guided surgery. Methods: An NIR-AZA fluorophore with hydrophilic and phobic features was synthesised in a straightforward manner and its aggregation properties characterised spectroscopically and by TEM imaging. Toxicity was assessed in a rodent model and dual color fluorescence imaging evaluated by lymph node mapping in a large animal porcine models and in ex-vivo human tissue specimen. Results: Dual color fluorescence imaging has been achieved in the highly complex biomedical scenario of lymph node mapping. Emissions at 700 and 800 nm can be achieved from a single fluorophore by establishing molecular and aggregate forms. Fluorophore was compatible with clinical systems for fluorescence guided surgery and no toxicity was observed in high dosage testing. Conclusion: A new, biomedical compatible form of NIR-dual emission wavelength imaging has been established using a readily accessible fluorophore with significant scope for clinical translation.
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Affiliation(s)
- Niamh Curtin
- Department of Chemistry, Royal College of Surgeons in Ireland, RCSI, 123 St Stephen's Green, Dublin 2, Ireland
| | - Dan Wu
- Department of Chemistry, Royal College of Surgeons in Ireland, RCSI, 123 St Stephen's Green, Dublin 2, Ireland
| | - Ronan Cahill
- UCD Centre for Precision Surgery, School of Medicine, University College Dublin, Ireland; Department of Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
| | - Anwesha Sarkar
- UCD Centre for Precision Surgery, School of Medicine, University College Dublin, Ireland; Department of Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
| | - Pól Mac Aonghusa
- IBM Research - Ireland, Damastown Industrial Estate, Mulhuddart, Dublin 15, Ireland
| | - Sergiy Zhuk
- IBM Research - Ireland, Damastown Industrial Estate, Mulhuddart, Dublin 15, Ireland
| | - Manuel Barberio
- IHU-Strasbourg, Institute of Hybrid Image-Guided Surgery, Strasbourg, France
| | - Mahdi Al-Taher
- IHU-Strasbourg, Institute of Hybrid Image-Guided Surgery, Strasbourg, France
| | - Jacques Marescaux
- IRCAD, Research Institute against Cancer of the Digestive System, Strasbourg, France
| | - Michele Diana
- IHU-Strasbourg, Institute of Hybrid Image-Guided Surgery, Strasbourg, France.,IRCAD, Research Institute against Cancer of the Digestive System, Strasbourg, France.,ICube Lab, Photonics Instrumentation for Health, Strasbourg, France
| | - Donal F O'Shea
- Department of Chemistry, Royal College of Surgeons in Ireland, RCSI, 123 St Stephen's Green, Dublin 2, Ireland
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12
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Khan F, Keenan R, Keyes A, Cahill RA. Intra-operative visualization of the ureter by near-infrared fluorescence during robotic-assisted laparoscopic sigmoidectomy for diverticulitis - a video vignette. Colorectal Dis 2020; 22:354-355. [PMID: 31713979 DOI: 10.1111/codi.14908] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 10/18/2019] [Indexed: 12/19/2022]
Affiliation(s)
- F Khan
- Department of Surgery, Mater Misericordiae University Hospital, Dublin, Ireland.,Centre for Precision Surgery, Section of Surgery, School of Medicine, University College Dublin, Dublin, Ireland
| | - R Keenan
- Department of Urological Surgery, Mater Misercordiae University Hospital, Dublin, Ireland
| | - A Keyes
- Department of Surgery, Mater Misericordiae University Hospital, Dublin, Ireland
| | - R A Cahill
- Department of Surgery, Mater Misericordiae University Hospital, Dublin, Ireland.,Centre for Precision Surgery, Section of Surgery, School of Medicine, University College Dublin, Dublin, Ireland
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Daly HC, Conroy E, Todor M, Wu D, Gallagher WM, O'Shea DF. An EPR Strategy for Bio-responsive Fluorescence Guided Surgery with Simulation of the Benefit for Imaging. Am J Cancer Res 2020; 10:3064-3082. [PMID: 32194855 PMCID: PMC7053210 DOI: 10.7150/thno.42702] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 01/09/2020] [Indexed: 12/11/2022] Open
Abstract
A successful matching of a PEG group size with the EPR effect for an off-to-on responsive NIR-fluorophore conjugate has been accomplished which allows two distinct in vivo tumor imaging periods, the first being the switch on during the initial tumor uptake via enhanced permeability into the ROI (as background is suppressed) and a second, later, due to enhanced retention within the tumor. Methods: Software simulation (https://mihaitodor.github.io/particle_simulation/index.html), synthetic chemistry, with in vitro and in vivo imaging have been synergistically employed to identify an optimal PEG conjugate of a bio-responsive NIR-AZA fluorophore for in vivo tumor imaging. Results: A bio-responsive NIR-AZA fluorophore conjugated to a 10 kDa PEG group has shown excellent in vivo imaging performance with sustained high tumor to background ratios and peak tumor emission within 24 h. Analysis of fluorescence profiles over 7 days has provided evidence for the EPR effect playing a positive role. Conclusion: Preclinical results show that exploiting the EPR effect by utilizing an optimized PEG substituent on a bio-responsive fluorophore may offer a means for intraoperative tumor margin delineation. The off-to-on responsive nature of the fluorophore makes tumor imaging achievable without waiting for clearance from normal tissue.
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Bodio E, Denat F, Goze C. BODIPYS and aza-BODIPY derivatives as promising fluorophores for in vivo molecular imaging and theranostic applications. J PORPHYR PHTHALOCYA 2020. [DOI: 10.1142/s1088424619501268] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Since their discovery in 1968, the BODIPYs dyes (4,4-difluoro-4-bora-3a, 4a diaza-s-indacene) have found an exponentially increasing number of applications in a large variety of scientific fields. In particular, studies reporting bioapplications of BODIPYs have increased dramatically. However, most of the time, only in vitro investigations have been reported. The in vivo potential of BODIPYs and aza-BODIPYs is more recent, but considering the number of in vivo studies with BODIPY and aza-BODIPY which have been reported in the last five years, we can now affirm that this family of fluorophores can be considered important as cyanine dyes for future in vivo and even clinical applications. This review aims to present representative examples of recent in vivo applications of BODIPYs or aza-BODIPYs, and to highlight the potential of these dyes for optical molecular imaging.
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Affiliation(s)
- Ewen Bodio
- Institut de Chimie Moléculaire de l’Université de Bourgogne, UMR 6302, CNRS, Université Bourgogne Franche-Comté, 9 Avenue A. Savary, 21078 Dijon Cedex, France
| | - Franck Denat
- Institut de Chimie Moléculaire de l’Université de Bourgogne, UMR 6302, CNRS, Université Bourgogne Franche-Comté, 9 Avenue A. Savary, 21078 Dijon Cedex, France
| | - Christine Goze
- Institut de Chimie Moléculaire de l’Université de Bourgogne, UMR 6302, CNRS, Université Bourgogne Franche-Comté, 9 Avenue A. Savary, 21078 Dijon Cedex, France
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Florès O, Pliquett J, Abad Galan L, Lescure R, Denat F, Maury O, Pallier A, Bellaye PS, Collin B, Même S, Bonnet CS, Bodio E, Goze C. Aza-BODIPY Platform: Toward an Efficient Water-Soluble Bimodal Imaging Probe for MRI and Near-Infrared Fluorescence. Inorg Chem 2020; 59:1306-1314. [DOI: 10.1021/acs.inorgchem.9b03017] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Océane Florès
- CNRS, Université Bourgogne Franche-Comté, ICMUB UMR6302 − CNRS, F-21000 Dijon, France
| | - Jacques Pliquett
- CNRS, Université Bourgogne Franche-Comté, ICMUB UMR6302 − CNRS, F-21000 Dijon, France
| | - Laura Abad Galan
- Université Lyon, Ecole Normale Supérieure de Lyon, CNRS, Université Claude Bernard Lyon 1, Laboratoire de Chimie, UMR 5182, F-69342 Lyon, France
| | - Robin Lescure
- CNRS, Université Bourgogne Franche-Comté, ICMUB UMR6302 − CNRS, F-21000 Dijon, France
| | - Franck Denat
- CNRS, Université Bourgogne Franche-Comté, ICMUB UMR6302 − CNRS, F-21000 Dijon, France
| | - Olivier Maury
- Université Lyon, Ecole Normale Supérieure de Lyon, CNRS, Université Claude Bernard Lyon 1, Laboratoire de Chimie, UMR 5182, F-69342 Lyon, France
| | - Agnès Pallier
- Centre de Biophysique Moléculaire, CNRS, Université d’Orléans, Rue Charles Sadron, 45071 Orléans Cedex 2, France
| | - Pierre-Simon Bellaye
- Centre Georges François Leclerc, Service de Médecine Nucléaire (Plateforme d’Imagerie et de Radiothérapie Précliniques), 1 rue Professeur Marion, BP77980, 21079 Dijon Cedex, France
| | - Bertrand Collin
- CNRS, Université Bourgogne Franche-Comté, ICMUB UMR6302 − CNRS, F-21000 Dijon, France
| | - Sandra Même
- Centre de Biophysique Moléculaire, CNRS, Université d’Orléans, Rue Charles Sadron, 45071 Orléans Cedex 2, France
| | - Célia S. Bonnet
- Centre de Biophysique Moléculaire, CNRS, Université d’Orléans, Rue Charles Sadron, 45071 Orléans Cedex 2, France
| | - Ewen Bodio
- CNRS, Université Bourgogne Franche-Comté, ICMUB UMR6302 − CNRS, F-21000 Dijon, France
| | - Christine Goze
- CNRS, Université Bourgogne Franche-Comté, ICMUB UMR6302 − CNRS, F-21000 Dijon, France
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Wu D, Durán-Sampedro G, O’Shea DF. Synthesis and properties of water-soluble 1,9-dialkyl-substituted BF2 azadipyrromethene fluorophores. Front Chem Sci Eng 2019. [DOI: 10.1007/s11705-019-1828-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Wu D, Daly HC, Grossi M, Conroy E, Li B, Gallagher WM, Elmes R, O'Shea DF. RGD conjugated cell uptake off to on responsive NIR-AZA fluorophores: applications toward intraoperative fluorescence guided surgery. Chem Sci 2019; 10:6944-6956. [PMID: 31588261 PMCID: PMC6686729 DOI: 10.1039/c9sc02197c] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 06/14/2019] [Indexed: 02/06/2023] Open
Abstract
The use of NIR-fluorescence imaging to demarcate tumour boundaries for real-time guidance of their surgical resection has a huge untapped potential. However, fluorescence imaging using molecular fluorophores, even with a targeting biomolecule attached, has a major shortcoming of signal interference from non-specific background fluorescence outside the region of interest. This poor selectivity necessitates prolonged time delays to allow clearance of background fluorophore and retention within the tumour prior to image acquisition. In this report, an innovative approach to overcome this issue is described in which cancer targeted off to on bio-responsive NIR-fluorophores are utilised to switch-on first within the tumour. Bio-responsive cRGD, iRGD and PEG conjugates have been synthesised using activated ester/amine or maleimide/thiol couplings to link targeting and fluorophore components. Their off to on emission responses were measured and compared with an always-on non-responsive control with each bio-responsive derivative showing large fluorescence enhancement values. Live cell imaging experiments using metastatic breast cancer cells confirmed in vitro bio-responsive capabilities. An in vivo assessment of MDA-MB 231 tumour imaging performance for bio-responsive and always-on fluorophores was conducted with monitoring of fluorescence distributions over 96 h. As anticipated, the always-on fluorophore gave an immediate, non-specific and very strong emission throughout whereas the bio-responsive derivatives initially displayed very low fluorescence. All three bio-responsive derivatives switched on within tumours at time points consistent with their conjugated targeting groups. cRGD and iRGD conjugates both had effective tumour turn-on in the first hour, though the cRGD derivative had superior specificity for tumour over the iRGD conjugate. The pegylated derivative had similar switch-on characteristics but over a much longer period, taking 9 h before a significant emission was observable from the tumour. Evidence for in vivo active tumour targeting was obtained for the best performing cRGD bio-responsive NIR-AZA derivative from competitive binding studies. Overall, this cRGD-conjugate has the potential to overcome the inherent drawback of targeted always-on fluorophores requiring prolonged clearance times and shows excellent potential for clinical translation for intraoperative use in fluorescence guided tumour resections.
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Affiliation(s)
- Dan Wu
- Department of Chemistry , RCSI , 123 St. Stephen's Green , Dublin 2 , Ireland .
| | - Harrison C Daly
- Department of Chemistry , RCSI , 123 St. Stephen's Green , Dublin 2 , Ireland .
| | - Marco Grossi
- Department of Chemistry , RCSI , 123 St. Stephen's Green , Dublin 2 , Ireland .
| | - Emer Conroy
- School of Biomolecular and Biomedical Science , Conway Institute, University College Dublin , Belfield , Dublin 4 , Ireland
| | - Bo Li
- School of Biomolecular and Biomedical Science , Conway Institute, University College Dublin , Belfield , Dublin 4 , Ireland
| | - William M Gallagher
- School of Biomolecular and Biomedical Science , Conway Institute, University College Dublin , Belfield , Dublin 4 , Ireland
| | - Robert Elmes
- Department of Chemistry , Maynooth University Human Health Institute , Maynooth University , Maynooth , Ireland
| | - Donal F O'Shea
- Department of Chemistry , RCSI , 123 St. Stephen's Green , Dublin 2 , Ireland .
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