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von Werz V, Spadiut O, Kozma B. A review and statistical analysis to identify and describe relationships between CQAs and CPPs of natural killer cell expansion processes. Cytotherapy 2024:S1465-3249(24)00733-3. [PMID: 38944794 DOI: 10.1016/j.jcyt.2024.05.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 05/29/2024] [Accepted: 05/29/2024] [Indexed: 07/01/2024]
Abstract
Natural killer (NK) cells make only a small fraction of immune cells in the human body, however, play a pivotal role in the fight against cancer by the immune system. They are capable of eliminating abnormal cells via several direct or indirect cytotoxicity pathways in a self-regulating manner, which makes them a favorable choice as a cellular therapy against cancer. Additionally, allogeneic NK cells, unlike other lymphocytes, do not or only minimally cause graft-versus-host diseases opening the door for an off-the-shelf therapy. However, to date, the production of NK cells faces several difficulties, especially because the critical process parameters (CPPs) influencing the critical quality attributes (CQAs) are difficult to identify or correlate. There are numerous different cultivation platforms available, all with own characteristics, benefits and disadvantages that add further difficulty to define CPPs and relate them to CQAs. Our goal in this contribution was to summarize the current knowledge about NK cell expansion CPPs and CQAs, therefore we analyzed the available literature of both dynamic and static culture format experiments in a systematic manner. We present a list of the identified CQAs and CPPs and discuss the role of each CPP in the regulation of the CQAs. Furthermore, we could identify potential relationships between certain CPPs and CQAs. The findings based on this systematic literature research can be the foundation for meaningful experiments leading to better process understanding and eventually control.
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Affiliation(s)
- Valentin von Werz
- Research Area Biochemical Engineering, Institute of Chemical, Environmental and Bioscience Engineering, Technische Universität Wien, Vienna, Austria
| | - Oliver Spadiut
- Research Area Biochemical Engineering, Institute of Chemical, Environmental and Bioscience Engineering, Technische Universität Wien, Vienna, Austria
| | - Bence Kozma
- Research Area Biochemical Engineering, Institute of Chemical, Environmental and Bioscience Engineering, Technische Universität Wien, Vienna, Austria.
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2
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Barros Oliveira CV, Paulino da Silva ME, de Lima JR, Tavares Moreira AM, Mendes Brito MJ, Coelho Gonçalves CA, Lemos de Barros JE, de Oliveira RM, Kamdem JP, Barros LM, Duarte AE. Correlations between the degree of infection by wild strain of Toxoplasma gondii in vitro and porcine hematological parameters. Exp Parasitol 2024; 261:108754. [PMID: 38636935 DOI: 10.1016/j.exppara.2024.108754] [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: 09/10/2023] [Revised: 04/02/2024] [Accepted: 04/10/2024] [Indexed: 04/20/2024]
Abstract
The apicomplexa Toxoplasma gondii is capable of actively proliferating in numerous types of nucleated cells, and therefore has a high potential for dissemination and resistance. Thus, the present work aimed to correlate the inoculum concentrations and amount of post-infection parasites with porcine hematological parameters (including biochemistry) through in vitro culture. Porcine blood was incubated with different concentrations of parasites (1.2 × 107, 6/3/1.5 × 106 cells/mL), then the concentrations of red blood cells (RBC) and their morphology, total and differential leukocytes, and free peptides were evaluated. In addition, eight different blood samples analyzed before inoculation, where subsequent multivariate analysis was applied to correlate different variables with trophozoite concentration. The results showed no significant variation (p < 0.05) in the relative levels of free peptides, or the relative percentage of RBC at all the parasite concentrations tested. However, the normalized percentages of leukocytes and neutrophils showed a significant reduction, while those of lymphocytes, eosinophils and monocytes showed the opposite behavior. Semi-automatic processing of images exhibited significant microcytosis and hypochromia. The multivariate analysis revealed a positive correlation between the amount number of protozoa (AP) and the variables: "Red cells" and "Neutrophils", an indifference between the AP and the content of free peptides, and the concentration of monocytes in the samples; and a negative correlation for AP and the percentages of lymphocytes and eosinophils. Our results suggest that specific changes in hematological parameters may be associated with different degrees of parasitemia, demanding a thorough diagnostic process and adequate treatment.
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Affiliation(s)
| | - Maria Elenilda Paulino da Silva
- Laboratory for Research and Diagnosis of Tropical Diseases - LPDDT, Federal University of Pernambuco - UFPE, Recife, 50670-901, Brazil
| | - Jailson Renato de Lima
- Laboratory of Agricultural Entomology - LEA, Federal University of Cariri, Crato, 63113-140, Ceará, Brazil
| | - Amanda Maria Tavares Moreira
- Laboratory of Biology and Toxicology - BIOTOX, Regional University of Cariri - URCA, Crato, 63105-000, Ceará, Brazil
| | - Maria Jéssica Mendes Brito
- Center for Biological and Health Sciences - CCBS, Department of Biological Sciences, Regional University of Cariri - URCA, 63105-000, Crato, Ceara, Brazil
| | - Cicera Alane Coelho Gonçalves
- Laboratory of Semi-Arid Bioprospecting and Alternative Methods- LABSEMA, Regional University of Cariri - URCA, Crato, 63105-000, Ceará, Brazil
| | - João Eudes Lemos de Barros
- Laboratory of Pharmacology and Molecular Chemistry, Regional University of Cariri - URCA, Crato, 63105-000, Ceará, Brazil
| | | | - Jean Paul Kamdem
- Laboratory of Biology and Toxicology - BIOTOX, Regional University of Cariri - URCA, Crato, 63105-000, Ceará, Brazil
| | - Luiz Marivando Barros
- Laboratory of Plant Ecophysiology - LECOV, Regional University of Cariri - URCA, Crato, 63105-000, Ceará, Brazil
| | - Antonia Eliene Duarte
- Laboratory of Biology and Toxicology - BIOTOX, Regional University of Cariri - URCA, Crato, 63105-000, Ceará, Brazil
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Kassis G, Palshikar MG, Hilchey SP, Zand MS, Thakar J. Discrete-state models identify pathway specific B cell states across diseases and infections at single-cell resolution. J Theor Biol 2024; 583:111769. [PMID: 38423206 PMCID: PMC11046450 DOI: 10.1016/j.jtbi.2024.111769] [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: 05/28/2023] [Revised: 02/10/2024] [Accepted: 02/17/2024] [Indexed: 03/02/2024]
Abstract
Oxygen (O2) regulated pathways modulate B cell activation, migration and proliferation during infection, vaccination, and other diseases. Modeling these pathways in health and disease is critical to understand B cell states and ways to mediate them. To characterize B cells by their activation of O2 regulated pathways we develop pathway specific discrete state models using previously published single-cell RNA-sequencing (scRNA-seq) datasets from isolated B cells. Specifically, Single Cell Boolean Omics Network Invariant-Time Analysis (scBONITA) was used to infer logic gates for known pathway topologies. The simplest inferred set of logic gates that maximized the number of "OR" interactions between genes was used to simulate B cell networks involved in oxygen sensing until they reached steady network states (attractors). By focusing on the attractors that best represented sequenced cells, we identified genes critical in determining pathway specific cellular states that corresponded to diseased and healthy B cell phenotypes. Specifically, we investigate the transendothelial migration, regulation of actin cytoskeleton, HIF1A, and Citrate Cycle pathways. Our analysis revealed attractors that resembled the state of B cell exhaustion in HIV+ patients as well as attractors that promoted anerobic metabolism, angiogenesis, and tumorigenesis in breast cancer patients, which were eliminated after neoadjuvant chemotherapy (NACT). Finally, we investigated the attractors to which the Azimuth-annotated B cells mapped and found that attractors resembling B cells from HIV+ patients encompassed a significantly larger number of atypical memory B cells than HIV- attractors. Meanwhile, attractors resembling B cells from breast cancer patients post NACT encompassed a reduced number of atypical memory B cells compared to pre-NACT attractors.
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Affiliation(s)
- George Kassis
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, Rochester, USA
| | - Mukta G Palshikar
- Biophysics, Structural, and Computational Biology Program, University of Rochester School of Medicine and Dentistry, Rochester, USA
| | - Shannon P Hilchey
- Department of Medicine, Division of Nephrology, University of Rochester Medical Center, Rochester, NY, USA
| | - Martin S Zand
- Department of Medicine, Division of Nephrology, University of Rochester Medical Center, Rochester, NY, USA
| | - Juilee Thakar
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, Rochester, USA; Biophysics, Structural, and Computational Biology Program, University of Rochester School of Medicine and Dentistry, Rochester, USA; Department of Biostatistics and Computational Biology, University of Rochester School of Medicine and Dentistry, Rochester, USA; Department of Biomedical Genetics, University of Rochester School of Medicine and Dentistry, Rochester, USA.
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4
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The Challenges of O 2 Detection in Biological Fluids: Classical Methods and Translation to Clinical Applications. Int J Mol Sci 2022; 23:ijms232415971. [PMID: 36555613 PMCID: PMC9786805 DOI: 10.3390/ijms232415971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/10/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Dissolved oxygen (DO) is deeply involved in preserving the life of cellular tissues and human beings due to its key role in cellular metabolism: its alterations may reflect important pathophysiological conditions. DO levels are measured to identify pathological conditions, explain pathophysiological mechanisms, and monitor the efficacy of therapeutic approaches. This is particularly relevant when the measurements are performed in vivo but also in contexts where a variety of biological and synthetic media are used, such as ex vivo organ perfusion. A reliable measurement of medium oxygenation ensures a high-quality process. It is crucial to provide a high-accuracy, real-time method for DO quantification, which could be robust towards different medium compositions and temperatures. In fact, biological fluids and synthetic clinical fluids represent a challenging environment where DO interacts with various compounds and can change continuously and dynamically, and further precaution is needed to obtain reliable results. This study aims to present and discuss the main oxygen detection and quantification methods, focusing on the technical needs for their translation to clinical practice. Firstly, we resumed all the main methodologies and advancements concerning dissolved oxygen determination. After identifying the main groups of all the available techniques for DO sensing based on their mechanisms and applicability, we focused on transferring the most promising approaches to a clinical in vivo/ex vivo setting.
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Hilchey SP, Palshikar MG, Mendelson ES, Shen S, Rasam S, Emo JA, Qu J, Thakar J, Zand MS. Cyclosporine A Modulates LSP1 Protein Levels in Human B Cells to Attenuate B Cell Migration at Low O 2 Levels. LIFE (BASEL, SWITZERLAND) 2022; 12:life12081284. [PMID: 36013463 PMCID: PMC9410508 DOI: 10.3390/life12081284] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/08/2022] [Accepted: 08/10/2022] [Indexed: 12/20/2022]
Abstract
Coordinated migration of B cells within and between secondary lymphoid tissues is required for robust antibody responses to infection or vaccination. Secondary lymphoid tissues normally expose B cells to a low O2 (hypoxic) environment. Recently, we have shown that human B cell migration is modulated by an O2-dependent molecular switch, centrally controlled by the hypoxia-induced (transcription) factor-1α (HIF1A), which can be disrupted by the immunosuppressive calcineurin inhibitor, cyclosporine A (CyA). However, the mechanisms by which low O2 environments attenuate B cell migration remain poorly defined. Proteomics analysis has linked CXCR4 chemokine receptor signaling to cytoskeletal rearrangement. We now hypothesize that the pathways linking the O2 sensing molecular switch to chemokine receptor signaling and cytoskeletal rearrangement would likely contain phosphorylation events, which are typically missed in traditional transcriptomic and/or proteomic analyses. Hence, we have performed a comprehensive phosphoproteomics analysis of human B cells treated with CyA after engagement of the chemokine receptor CXCR4 with CXCL12. Statistical analysis of the separate and synergistic effects of CyA and CXCL12 revealed 116 proteins whose abundance is driven by a synergistic interaction between CyA and CXCL12. Further, we used our previously described algorithm BONITA to reveal a critical role for Lymphocyte Specific Protein 1 (LSP1) in cytoskeletal rearrangement. LSP1 is known to modulate neutrophil migration. Validating these modeling results, we show experimentally that LSP1 levels in B cells increase with low O2 exposure, and CyA treatment results in decreased LSP1 protein levels. This correlates with the increased chemotactic activity observed after CyA treatment. Lastly, we directly link LSP1 levels to chemotactic capacity, as shRNA knock-down of LSP1 results in significantly increased B cell chemotaxis at low O2 levels. These results directly link CyA to LSP1-dependent cytoskeletal regulation, demonstrating a previously unrecognized mechanism by which CyA modulates human B cell migration. Data are available via ProteomeXchange with identifier PXD036167.
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Affiliation(s)
- Shannon P. Hilchey
- Department of Medicine, Division of Nephrology, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - Mukta G. Palshikar
- Biophysics, Structural, and Computational Biology Program, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - Eric S. Mendelson
- Department of Medicine, Division of Nephrology, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - Shichen Shen
- Department of Pharmaceutical Sciences, State University of New York (SUNY) at Buffalo, Buffalo, NY 14203, USA
- New York State Center of Excellence in Bioinformatics & Life Sciences, State University of New York (SUNY) at Buffalo, Buffalo, NY 14203, USA
| | - Sailee Rasam
- Department of Pharmaceutical Sciences, State University of New York (SUNY) at Buffalo, Buffalo, NY 14203, USA
- New York State Center of Excellence in Bioinformatics & Life Sciences, State University of New York (SUNY) at Buffalo, Buffalo, NY 14203, USA
| | - Jason A. Emo
- Department of Medicine, Division of Nephrology, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - Jun Qu
- Department of Pharmaceutical Sciences, State University of New York (SUNY) at Buffalo, Buffalo, NY 14203, USA
- New York State Center of Excellence in Bioinformatics & Life Sciences, State University of New York (SUNY) at Buffalo, Buffalo, NY 14203, USA
| | - Juilee Thakar
- Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, NY 14642, USA
- Department of Biostatistics and Computational Biology, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - Martin S. Zand
- Department of Medicine, Division of Nephrology, University of Rochester Medical Center, Rochester, NY 14642, USA
- Clinical and Translational Science Institute, University of Rochester Medical Center, Rochester, NY 14642, USA
- Correspondence:
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Edwards A, Kurtcuoglu V. Renal blood flow and oxygenation. Pflugers Arch 2022; 474:759-770. [PMID: 35438336 PMCID: PMC9338895 DOI: 10.1007/s00424-022-02690-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/19/2022] [Accepted: 03/21/2022] [Indexed: 02/07/2023]
Abstract
Our kidneys receive about one-fifth of the cardiac output at rest and have a low oxygen extraction ratio, but may sustain, under some conditions, hypoxic injuries that might lead to chronic kidney disease. This is due to large regional variations in renal blood flow and oxygenation, which are the prerequisite for some and the consequence of other kidney functions. The concurrent operation of these functions is reliant on a multitude of neuro-hormonal signaling cascades and feedback loops that also include the regulation of renal blood flow and tissue oxygenation. Starting with open questions on regulatory processes and disease mechanisms, we review herein the literature on renal blood flow and oxygenation. We assess the current understanding of renal blood flow regulation, reasons for disparities in oxygen delivery and consumption, and the consequences of disbalance between O2 delivery, consumption, and removal. We further consider methods for measuring and computing blood velocity, flow rate, oxygen partial pressure, and related parameters and point out how limitations of these methods constitute important hurdles in this area of research. We conclude that to obtain an integrated understanding of the relation between renal function and renal blood flow and oxygenation, combined experimental and computational modeling studies will be needed.
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Affiliation(s)
- Aurelie Edwards
- Department of Biomedical Engineering, Boston University, 44 Cummington Mall, Boston, MA, 02215, USA
| | - Vartan Kurtcuoglu
- Institute of Physiology, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland.
- National Center of Competence in Research, Kidney.CH, University of Zurich, Zurich, Switzerland.
- Zurich Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland.
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Harms FA, Ubbink R, de Wijs CJ, Ligtenberg MP, ter Horst M, Mik EG. Mitochondrial Oxygenation During Cardiopulmonary Bypass: A Pilot Study. Front Med (Lausanne) 2022; 9:785734. [PMID: 35924039 PMCID: PMC9339625 DOI: 10.3389/fmed.2022.785734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 06/08/2022] [Indexed: 11/13/2022] Open
Abstract
Objective Adequate oxygenation is essential for the preservation of organ function during cardiac surgery and cardiopulmonary bypass (CPB). Both hypoxia and hyperoxia result in undesired outcomes, and a narrow window for optimal oxygenation exists. Current perioperative monitoring techniques are not always sufficient to monitor adequate oxygenation. The non-invasive COMET® monitor could be a tool to monitor oxygenation by measuring the cutaneous mitochondrial oxygen tension (mitoPO2). This pilot study examines the feasibility of cutaneous mitoPO2 measurements during cardiothoracic procedures. Cutaneous mitoPO2 will be compared to tissue oxygenation (StO2) as measured by near-infrared spectroscopy. Design and Method This single-center observational study examined 41 cardiac surgery patients requiring CPB. Preoperatively, patients received a 5-aminolevulinic acid plaster on the upper arm to enable mitoPO2 measurements. After induction of anesthesia, both cutaneous mitoPO2 and StO2 were measured throughout the procedure. The patients were observed until discharge for the development of acute kidney insufficiency (AKI). Results Cutaneous mitoPO2 was successfully measured in all patients and was 63.5 [40.0-74.8] mmHg at the surgery start and decreased significantly (p < 0.01) to 36.4 [18.4-56.0] mmHg by the end of the CPB run. StO2 at the surgery start was 80.5 [76.8-84.3]% and did not change significantly. Cross-clamping of the aorta and the switch to non-pulsatile flow resulted in a median cutaneous mitoPO2 decrease of 7 mmHg (p < 0.01). The cessation of the aortic cross-clamping period resulted in an increase of 4 mmHg (p < 0.01). Totally, four patients developed AKI and had a lower preoperative eGFR of 52 vs. 81 ml/min in the non-AKI group. The AKI group spent 32% of the operation time with a cutaneous mitoPO2 value under 20 mmHg as compared to 8% in the non-AKI group. Conclusion This pilot study illustrated the feasibility of measuring cutaneous mitoPO2 using the COMET® monitor during cardiothoracic procedures. Moreover, in contrast to StO2, mitoPO2 decreased significantly with the increasing CPB run time. Cutaneous mitoPO2 also significantly decreased during the aortic cross-clamping period and increased upon the release of the clamp, but StO2 did not. This emphasized the sensitivity of cutaneous mitoPO2 to detect circulatory and microvascular changes.
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Affiliation(s)
- Floor A. Harms
- Department of Anesthesiology, Erasmus Medical Center, Erasmus University Rotterdam, Rotterdam, Netherlands
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8
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Marro FC, Laurent F, Josse J, Blocker AJ. Methods to monitor bacterial growth and replicative rates at the single-cell level. FEMS Microbiol Rev 2022; 46:6623663. [PMID: 35772001 PMCID: PMC9629498 DOI: 10.1093/femsre/fuac030] [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: 02/26/2022] [Revised: 06/01/2022] [Accepted: 06/28/2022] [Indexed: 01/09/2023] Open
Abstract
The heterogeneity of bacterial growth and replicative rates within a population was proposed a century ago notably to explain the presence of bacterial persisters. The term "growth rate" at the single-cell level corresponds to the increase in size or mass of an individual bacterium while the "replicative rate" refers to its division capacity within a defined temporality. After a decades long hiatus, recent technical innovative approaches allow population growth and replicative rates heterogeneity monitoring at the single-cell level resuming in earnest. Among these techniques, the oldest and widely used is time-lapse microscopy, most recently combined with microfluidics. We also discuss recent fluorescence dilution methods informing only on replicative rates and best suited. Some new elegant single cell methods so far only sporadically used such as buoyant mass measurement and stable isotope probing have emerged. Overall, such tools are widely used to investigate and compare the growth and replicative rates of bacteria displaying drug-persistent behaviors to that of bacteria growing in specific ecological niches or collected from patients. In this review, we describe the current methods available, discussing both the type of queries these have been used to answer and the specific strengths and limitations of each method.
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Affiliation(s)
- Florian C Marro
- Evotec ID Lyon, In Vitro Biology, Infectious Diseases and Antibacterials Unit, Gerland, 69007 Lyon, France,CIRI – Centre International de Recherche en Infectiologie, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, Ecole Normale Supérieure de Lyon, Univ Lyon, F-69007 Lyon, France
| | - Frédéric Laurent
- CIRI – Centre International de Recherche en Infectiologie, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, Ecole Normale Supérieure de Lyon, Univ Lyon, F-69007 Lyon, France,Institut des Sciences Pharmaceutiques et Biologiques (ISPB), Université Claude Bernard Lyon 1, Lyon, France,Centre de Référence pour la prise en charge des Infections ostéo-articulaires complexes (CRIOAc Lyon; www.crioac-lyon.fr), Hospices Civils de Lyon, Lyon, France,Laboratoire de bactériologie, Institut des Agents Infectieux, French National Reference Center for Staphylococci, Hospices Civils de Lyon, Lyon, France
| | - Jérôme Josse
- CIRI – Centre International de Recherche en Infectiologie, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, Ecole Normale Supérieure de Lyon, Univ Lyon, F-69007 Lyon, France,Institut des Sciences Pharmaceutiques et Biologiques (ISPB), Université Claude Bernard Lyon 1, Lyon, France,Centre de Référence pour la prise en charge des Infections ostéo-articulaires complexes (CRIOAc Lyon; www.crioac-lyon.fr), Hospices Civils de Lyon, Lyon, France
| | - Ariel J Blocker
- Corresponding author. Evotec ID Lyon, In Vitro Biology, Infectious Diseases and Antibacterials Unit, France. E-mail:
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Guo H, Bai W, Ouyang W, Liu Y, Wu C, Xu Y, Weng Y, Zang H, Liu Y, Jacobson L, Hu Z, Wang Y, Arafa HM, Yang Q, Lu D, Li S, Zhang L, Xiao X, Vázquez-Guardado A, Ciatti J, Dempsey E, Ghoreishi-Haack N, Waters EA, Haney CR, Westman AM, MacEwan MR, Pet MA, Rogers JA. Wireless implantable optical probe for continuous monitoring of oxygen saturation in flaps and organ grafts. Nat Commun 2022; 13:3009. [PMID: 35637230 PMCID: PMC9151749 DOI: 10.1038/s41467-022-30594-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 05/04/2022] [Indexed: 12/24/2022] Open
Abstract
Continuous, real-time monitoring of perfusion after microsurgical free tissue transfer or solid organ allotransplantation procedures can facilitate early diagnosis of and intervention for anastomotic thrombosis. Current technologies including Doppler systems, cutaneous O2-sensing probes, and fluorine magnetic resonance imaging methods are limited by their intermittent measurements, requirements for skilled personnel, indirect interfaces, and/or their tethered connections. This paper reports a wireless, miniaturized, minimally invasive near-infrared spectroscopic system designed for uninterrupted monitoring of local-tissue oxygenation. A bioresorbable barbed structure anchors the probe stably at implantation sites for a time period matched to the clinical need, with the ability for facile removal afterward. The probe connects to a skin-interfaced electronic module for wireless access to essential physiological parameters, including local tissue oxygenation, pulse oxygenation, and heart rate. In vitro tests and in vivo studies in porcine flap and kidney models demonstrate the ability of the system to continuously measure oxygenation with high accuracy and sensitivity.
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Affiliation(s)
- Hexia Guo
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
| | - Wubin Bai
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA.
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA.
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27514, USA.
| | - Wei Ouyang
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
| | - Yihan Liu
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27514, USA
| | - Changsheng Wu
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
| | - Yameng Xu
- The Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO, 63110, USA
| | - Yang Weng
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Hao Zang
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Yiming Liu
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
| | - Lauren Jacobson
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Ziying Hu
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
| | - Yihang Wang
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27514, USA
| | - Hany M Arafa
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
| | - Quansan Yang
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Di Lu
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
| | - Shuo Li
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
| | - Lin Zhang
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27514, USA
| | - Xun Xiao
- Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27514, USA
| | | | - Joanna Ciatti
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA
| | - Elizabeth Dempsey
- Developmental Therapeutics Core, Northwestern University, Evanston, IL, 60208, USA
| | | | - Emily A Waters
- Center for Advanced Molecular Imaging, Northwestern University, Evanston, IL, 60208, USA
| | - Chad R Haney
- Center for Advanced Molecular Imaging, Northwestern University, Evanston, IL, 60208, USA
| | - Amanda M Westman
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Matthew R MacEwan
- Department of Neurosurgery, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Mitchell A Pet
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, MO, 63110, USA.
| | - John A Rogers
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA.
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL, 60208, USA.
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA.
- Department of Biomedical Engineering, Northwestern University, Evanston, IL, 60208, USA.
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA.
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Evanston, IL, 60208, USA.
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10
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Chapelin F, Gedaly R, Sweeney Z, Gossett LJ. Prognostic Value of Fluorine-19 MRI Oximetry Monitoring in cancer. Mol Imaging Biol 2022; 24:208-219. [PMID: 34708396 DOI: 10.1007/s11307-021-01648-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 08/27/2021] [Accepted: 08/30/2021] [Indexed: 11/24/2022]
Abstract
Hypoxia is a key prognostic indicator in most solid tumors, as it is correlated to tumor angiogenesis, metastasis, recurrence, and response to therapy. Accurate measurement and mapping of tumor oxygenation profile and changes upon intervention could facilitate disease progression assessment and assist in treatment planning. Currently, no gold standard exists for non-invasive spatiotemporal measurement of hypoxia. Magnetic resonance imaging (MRI) represents an attractive option as it is a clinically available and non-ionizing imaging modality. Specifically, perfluorocarbon (PFC) beacons can be externally introduced into the tumor tissue and the linear dependence of their spin-lattice relaxation rate (R1) on the local partial pressure of oxygen (pO2) exploited for real-time tissue oxygenation monitoring in vivo. In this review, we will focus on early studies and recent developments of fluorine-19 MRI and spectroscopy (MRS) for evaluation of tumor oximetry and response to therapy.
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Affiliation(s)
- Fanny Chapelin
- F. Joseph Halcomb III, M.D. Department of Biomedical Engineering, University of Kentucky, 514F RMB, 143 Graham Avenue, Lexington, KY, USA.
- Lucille Parker Markey Cancer Center, University of Kentucky, Lexington, KY, USA.
| | - Roberto Gedaly
- Lucille Parker Markey Cancer Center, University of Kentucky, Lexington, KY, USA
- Department of Surgery, Transplant Division, University of Kentucky, Lexington, KY, USA
| | - Zachary Sweeney
- College of Medicine, University of Kentucky, Lexington, KY, USA
| | - Liza J Gossett
- F. Joseph Halcomb III, M.D. Department of Biomedical Engineering, University of Kentucky, 514F RMB, 143 Graham Avenue, Lexington, KY, USA
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11
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Afshari R, Akhavan O, Hamblin MR, Varma RS. Review of Oxygenation with Nanobubbles: Possible Treatment for Hypoxic COVID-19 Patients. ACS APPLIED NANO MATERIALS 2021; 4:11386-11412. [PMID: 37556289 PMCID: PMC8565459 DOI: 10.1021/acsanm.1c01907] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Accepted: 10/12/2021] [Indexed: 05/05/2023]
Abstract
The coronavirus disease (COVID-19) pandemic, which has spread around the world, caused the death of many affected patients, partly because of the lack of oxygen arising from impaired respiration or blood circulation. Thus, maintaining an appropriate level of oxygen in the patients' blood by devising alternatives to ventilator systems is a top priority goal for clinicians. The present review highlights the ever-increasing application of nanobubbles (NBs), miniature gaseous vesicles, for the oxygenation of hypoxic patients. Oxygen-containing NBs can exert a range of beneficial physiologic and pharmacologic effects that include tissue oxygenation, as well as tissue repair mechanisms, antiinflammatory properties, and antibacterial activity. In this review, we provide a comprehensive survey of the application of oxygen-containing NBs, with a primary focus on the development of intravenous platforms. The multimodal functions of oxygen-carrying NBs, including antimicrobial, antiinflammatory, drug carrying, and the promotion of wound healing are discussed, including the benefits and challenges of using NBs as a treatment for patients with acute hypoxemic respiratory failure, particularly due to COVID-19.
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Affiliation(s)
- Ronak Afshari
- Department of Physics, Sharif University
of Technology, P.O. Box 11155-9161, Tehran 14588-89694,
Iran
| | - Omid Akhavan
- Department of Physics, Sharif University
of Technology, P.O. Box 11155-9161, Tehran 14588-89694,
Iran
| | - Michael R Hamblin
- Laser Research Centre, Faculty of Health Science,
University of Johannesburg, Doornfontein 2028, South
Africa
| | - Rajender S. Varma
- Regional Center of Advanced Technologies and Materials,
Czech Advanced Technology and Research Institute, Palacky
University, Šlechtitelů 27, Olomouc 78371, Czech
Republic
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12
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Sonmezoglu S, Fineman JR, Maltepe E, Maharbiz MM. Monitoring deep-tissue oxygenation with a millimeter-scale ultrasonic implant. Nat Biotechnol 2021; 39:855-864. [PMID: 33782610 DOI: 10.1038/s41587-021-00866-y] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 02/19/2021] [Indexed: 11/09/2022]
Abstract
Vascular complications following solid organ transplantation may lead to graft ischemia, dysfunction or loss. Imaging approaches can provide intermittent assessments of graft perfusion, but require highly skilled practitioners and do not directly assess graft oxygenation. Existing systems for monitoring tissue oxygenation are limited by the need for wired connections, the inability to provide real-time data or operation restricted to surface tissues. Here, we present a minimally invasive system to monitor deep-tissue O2 that reports continuous real-time data from centimeter-scale depths in sheep and up to a 10-cm depth in ex vivo porcine tissue. The system is composed of a millimeter-sized, wireless, ultrasound-powered implantable luminescence O2 sensor and an external transceiver for bidirectional data transfer, enabling deep-tissue oxygenation monitoring for surgical or critical care indications.
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Affiliation(s)
- Soner Sonmezoglu
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, Berkeley, CA, USA.
| | - Jeffrey R Fineman
- Department of Pediatrics, University of California, San Francisco, San Francisco, CA, USA.,Initiative for Pediatric Drug and Device Development, San Francisco, CA, USA
| | - Emin Maltepe
- Department of Pediatrics, University of California, San Francisco, San Francisco, CA, USA.,Initiative for Pediatric Drug and Device Development, San Francisco, CA, USA
| | - Michel M Maharbiz
- Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, Berkeley, CA, USA. .,The UC Berkeley-UCSF Graduate Program in Bioengineering, University of California, Berkeley, Berkeley, CA, USA. .,Chan Zuckerberg Biohub, San Francisco, CA, USA.
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13
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Witthauer L, Cascales JP, Roussakis E, Li X, Goss A, Chen Y, Evans CL. Portable Oxygen-Sensing Device for the Improved Assessment of Compartment Syndrome and other Hypoxia-Related Conditions. ACS Sens 2021; 6:43-53. [PMID: 33325684 DOI: 10.1021/acssensors.0c01686] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Measurement of intramuscular oxygen could play a key role in the early diagnosis of acute compartment syndrome, a common condition occurring after severe trauma leading to ischemia and long-term consequences including rhabdomyolysis, limb loss, and death. However, to date, there is no existing oxygen sensor approved for such a purpose. To address the need to improve the assessment of compartment syndrome, a portable fiber-optic device for intramuscular oxygen measurements was developed. The device is based on phosphorescence quenching, where the tip of an optical fiber was coated with a poly(propyl methacrylate) (PPMA) matrix containing a brightly emitting Pt(II)-core porphyrin. The optoelectronic circuit is highly portable and is based on a microspectrometer and a microcontroller readout with a smartphone. Results from an in vivo tourniquet porcine model show that the sensor is sensitive across the physiological oxygen partial pressure range of 0-80 mmHg and exhibits an appropriate and reproducible response to changes in intramuscular oxygen. A commercial laboratory oxygen sensor based on a lifetime measurement did not respond as expected.
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Affiliation(s)
- Lilian Witthauer
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, United States
| | - Juan Pedro Cascales
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, United States
| | - Emmanuel Roussakis
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, United States
| | - Xiaolei Li
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, United States
| | - Avery Goss
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, United States
| | - Yenyu Chen
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, United States
| | - Conor L. Evans
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, United States
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14
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Swartz HM, Flood AB, Williams BB, Pogue BW, Schaner PE, Vaupel P. What Is the Meaning of an Oxygen Measurement? : Analysis of Methods Purporting to Measure Oxygen in Targeted Tissues. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1269:301-308. [PMID: 33966234 DOI: 10.1007/978-3-030-48238-1_48] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Clinical measurements of O2 in tissues will inevitably provide data that are at best aggregated and will not reflect the inherent heterogeneity of O2 in tissues over space and time. Additionally, the nature of all existing techniques to measure O2 results in complex sampling of the volume that is sensed by the technique. By recognizing these potential limitations of the measures, one can focus on the very important and useful information that can be obtained from these techniques, especially data about factors that can change levels of O2 and then exploit these changes diagnostically and therapeutically. The clinical utility of such data ultimately needs to be verified by careful studies of outcomes related to the measured changes in levels of O2.
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Affiliation(s)
- Harold M Swartz
- Department of Radiology, Dartmouth Medical School, Hanover, NH, USA.
- Department of Radiation Oncology, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA.
- Thayer School of Engineering, Dartmouth College, Hanover, NH, USA.
| | - Ann Barry Flood
- Department of Radiology, Dartmouth Medical School, Hanover, NH, USA
| | - Benjamin B Williams
- Department of Radiation Oncology, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
| | - Brian W Pogue
- Thayer School of Engineering, Dartmouth College, Hanover, NH, USA
| | - Philip E Schaner
- Department of Radiation Oncology, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
| | - Peter Vaupel
- Department of Radiation Oncology, University Medical Center, University of Freiburg, Freiburg, Germany
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15
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Wu L, Liu F, Liu S, Xu X, Liu Z, Sun X. Perfluorocarbons-Based 19F Magnetic Resonance Imaging in Biomedicine. Int J Nanomedicine 2020; 15:7377-7395. [PMID: 33061385 PMCID: PMC7537992 DOI: 10.2147/ijn.s255084] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 07/15/2020] [Indexed: 12/15/2022] Open
Abstract
Fluorine-19 (19F) magnetic resonance (MR) molecular imaging is a promising noninvasive and quantitative molecular imaging approach with intensive research due to the high sensitivity and low endogenous background signal of the 19F atom in vivo. Perfluorocarbons (PFCs) have been used as blood substitutes since 1970s. More recently, a variety of PFC nanoparticles have been designed for the detection and imaging of physiological and pathological changes. These molecular imaging probes have been developed to label cells, target specific epitopes in tumors, monitor the prognosis and therapy efficacy and quantitate characterization of tumors and changes in tumor microenvironment noninvasively, therefore, significantly improving the prognosis and therapy efficacy. Herein, we discuss the recent development and applications of 19F MR techniques with PFC nanoparticles in biomedicine, with particular emphasis on ligand-targeted and quantitative 19F MR imaging approaches for tumor detection, oxygenation measurement, smart stimulus response and therapy efficacy monitoring, et al.
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Affiliation(s)
- Lina Wu
- NHC and CAMS Key Laboratory of Molecular Probe and Targeted Theranostics, Molecular Imaging Research Center (MIRC), Harbin Medical University, Harbin, Heilongjiang 150028, People's Republic of China.,TOF-PET/CT/MR Center, Harbin Medical University, Harbin, Heilongjiang 150028, People's Republic of China
| | - Fang Liu
- NHC and CAMS Key Laboratory of Molecular Probe and Targeted Theranostics, Molecular Imaging Research Center (MIRC), Harbin Medical University, Harbin, Heilongjiang 150028, People's Republic of China.,Department of Medical Imaging, Harbin Medical University, Harbin, Heilongjiang 150028, People's Republic of China
| | - Shuang Liu
- NHC and CAMS Key Laboratory of Molecular Probe and Targeted Theranostics, Molecular Imaging Research Center (MIRC), Harbin Medical University, Harbin, Heilongjiang 150028, People's Republic of China.,TOF-PET/CT/MR Center, Harbin Medical University, Harbin, Heilongjiang 150028, People's Republic of China
| | - Xiuan Xu
- NHC and CAMS Key Laboratory of Molecular Probe and Targeted Theranostics, Molecular Imaging Research Center (MIRC), Harbin Medical University, Harbin, Heilongjiang 150028, People's Republic of China.,Department of Medical Imaging, Harbin Medical University, Harbin, Heilongjiang 150028, People's Republic of China
| | - Zhaoxi Liu
- NHC and CAMS Key Laboratory of Molecular Probe and Targeted Theranostics, Molecular Imaging Research Center (MIRC), Harbin Medical University, Harbin, Heilongjiang 150028, People's Republic of China.,TOF-PET/CT/MR Center, Harbin Medical University, Harbin, Heilongjiang 150028, People's Republic of China
| | - Xilin Sun
- NHC and CAMS Key Laboratory of Molecular Probe and Targeted Theranostics, Molecular Imaging Research Center (MIRC), Harbin Medical University, Harbin, Heilongjiang 150028, People's Republic of China.,TOF-PET/CT/MR Center, Harbin Medical University, Harbin, Heilongjiang 150028, People's Republic of China
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16
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Swartz HM, Flood AB, Schaner PE, Halpern H, Williams BB, Pogue BW, Gallez B, Vaupel P. How best to interpret measures of levels of oxygen in tissues to make them effective clinical tools for care of patients with cancer and other oxygen-dependent pathologies. Physiol Rep 2020; 8:e14541. [PMID: 32786045 PMCID: PMC7422807 DOI: 10.14814/phy2.14541] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 07/01/2020] [Accepted: 07/01/2020] [Indexed: 02/07/2023] Open
Abstract
It is well understood that the level of molecular oxygen (O2 ) in tissue is a very important factor impacting both physiology and pathological processes as well as responsiveness to some treatments. Data on O2 in tissue could be effectively utilized to enhance precision medicine. However, the nature of the data that can be obtained using existing clinically applicable techniques is often misunderstood, and this can confound the effective use of the information. Attempts to make clinical measurements of O2 in tissues will inevitably provide data that are aggregated over time and space and therefore will not fully represent the inherent heterogeneity of O2 in tissues. Additionally, the nature of existing techniques to measure O2 may result in uneven sampling of the volume of interest and therefore may not provide accurate information on the "average" O2 in the measured volume. By recognizing the potential limitations of the O2 measurements, one can focus on the important and useful information that can be obtained from these techniques. The most valuable clinical characterizations of oxygen are likely to be derived from a series of measurements that provide data about factors that can change levels of O2 , which then can be exploited both diagnostically and therapeutically. The clinical utility of such data ultimately needs to be verified by careful studies of outcomes related to the measured changes in levels of O2 .
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Affiliation(s)
- Harold M Swartz
- Department of Radiology, Dartmouth Medical School, Hanover, NH, USA
- Department of Medicine, Section of Radiation Oncology, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
- Thayer School of Engineering, Dartmouth College, Hanover, NH, USA
| | - Ann Barry Flood
- Department of Radiology, Dartmouth Medical School, Hanover, NH, USA
| | - Philip E Schaner
- Department of Medicine, Section of Radiation Oncology, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
| | - Howard Halpern
- Department Radiation and Cellular Oncology, University of Chicago, Chicago, IL, USA
| | - Benjamin B Williams
- Department of Radiology, Dartmouth Medical School, Hanover, NH, USA
- Department of Medicine, Section of Radiation Oncology, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
- Thayer School of Engineering, Dartmouth College, Hanover, NH, USA
| | - Brian W Pogue
- Thayer School of Engineering, Dartmouth College, Hanover, NH, USA
- Department of Surgery, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
| | - Bernard Gallez
- Louvain Drug Research Institute, Université catholique de Louvain, Brussels, Belgium
| | - Peter Vaupel
- Department Radiation Oncology, University Medical Center, University of Freiburg, Freiburg, Germany
- German Cancer Center Consortium (DKTK) Partner Site Freiburg, German Cancer Research Center (DKFZ), Heidelberg, Germany
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17
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Hilchey SP, Palshikar MG, Emo JA, Li D, Garigen J, Wang J, Mendelson ES, Cipolla V, Thakar J, Zand MS. Cyclosporine a directly affects human and mouse b cell migration in vitro by disrupting a hIF-1 αdependent, o 2 sensing, molecular switch. BMC Immunol 2020; 21:13. [PMID: 32183695 PMCID: PMC7079363 DOI: 10.1186/s12865-020-0342-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 02/27/2020] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND Hypoxia is a potent molecular signal for cellular metabolism, mitochondrial function, and migration. Conditions of low oxygen tension trigger regulatory cascades mediated via the highly conserved HIF-1 α post-translational modification system. In the adaptive immune response, B cells (Bc) are activated and differentiate under hypoxic conditions within lymph node germinal centers, and subsequently migrate to other compartments. During migration, they traverse through changing oxygen levels, ranging from 1-5% in the lymph node to 5-13% in the peripheral blood. Interestingly, the calcineurin inhibitor cyclosporine A is known to stimulate prolyl hydroxylase activity, resulting in HIF-1 α destabilization and may alter Bc responses directly. Over 60% of patients taking calcineurin immunosuppressant medications have hypo-gammaglobulinemia and poor vaccine responses, putting them at high risk of infection with significantly increased morbidity and mortality. RESULTS We demonstrate that O 2 tension is a previously unrecognized Bc regulatory switch, altering CXCR4 and CXCR5 chemokine receptor signaling in activated Bc through HIF-1 α expression, and controlling critical aspects of Bc migration. Our data demonstrate that calcineurin inhibition hinders this O 2 regulatory switch in primary human Bc. CONCLUSION This previously unrecognized effect of calcineurin inhibition directly on human Bc has significant and direct clinical implications.
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Affiliation(s)
- Shannon P Hilchey
- University of Rochester Medical CenterDivision of Nephrology, 601 Elmwood Ave., Rochester, 14642 NY USA
| | - Mukta G Palshikar
- University of RochesterBiophysics, Structural, and Computational Biology Program, 601 Elmwood Ave. - Box 675, Rochester, 14642 NY USA
| | - Jason A Emo
- University of Rochester Medical CenterDivision of Nephrology, 601 Elmwood Ave., Rochester, 14642 NY USA
| | - Dongmei Li
- University of RochesterClinical and Translational Science Institute, 265 Crittenden Blvd., Rochester, 14642 NY USA
| | - Jessica Garigen
- University of RochesterClinical and Translational Science Institute, 265 Crittenden Blvd., Rochester, 14642 NY USA
| | - Jiong Wang
- University of Rochester Medical CenterDivision of Nephrology, 601 Elmwood Ave., Rochester, 14642 NY USA
| | - Eric S Mendelson
- University of Rochester Medical CenterDivision of Nephrology, 601 Elmwood Ave., Rochester, 14642 NY USA
| | - Valentina Cipolla
- University of Rochester Medical CenterDivision of Nephrology, 601 Elmwood Ave., Rochester, 14642 NY USA
| | - Juilee Thakar
- University of RochesterDepartment of Microbiology and Immunology, 601 Elmwood Ave - Box 672, Rochester, 14642 NY USA
- University of RochesterDepartment of Biostatistics and Computational Biology, 265 Crittenden Blvd., Rochester, 14642 NY USA
| | - Martin S Zand
- University of Rochester Medical CenterDivision of Nephrology, 601 Elmwood Ave., Rochester, 14642 NY USA
- University of RochesterClinical and Translational Science Institute, 265 Crittenden Blvd., Rochester, 14642 NY USA
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18
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Safley SA, Graham ML, Weegman BP, Einstein SA, Barber GF, Janecek JJ, Mutch LA, Singh A, Ramachandran S, Garwood M, Sambanis A, Papas KK, Hering BJ, Weber CJ. Noninvasive Fluorine-19 Magnetic Resonance Relaxometry Measurement of the Partial Pressure of Oxygen in Acellular Perfluorochemical-loaded Alginate Microcapsules Implanted in the Peritoneal Cavity of Nonhuman Primates. Transplantation 2020; 104:259-269. [PMID: 31385927 PMCID: PMC6994361 DOI: 10.1097/tp.0000000000002896] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND We have utilized a noninvasive technique for measuring the partial pressure of oxygen (pO2) in alginate microcapsules implanted intraperitoneally in healthy nonhuman primates (NHPs). Average pO2 is important for determining if a transplant site and capsules with certain passive diffusion characteristics can support the islet viability, metabolic activity, and dose necessary to reverse diabetes. METHODS Perfluoro-15-crown-5-ether alginate capsules were infused intraperitoneally into 3 healthy NHPs. Peritoneal pO2 levels were measured on days 0 and 7 using fluorine-19 magnetic resonance relaxometry and a fiber-optic probe. Fluorine-19 MRI was used to determine the locations of capsules within the peritoneal space on days 0 and 7. Gross and histologic evaluations of the capsules were used to assess their biocompatibility postmortem. RESULTS At day 0 immediately after infusion of capsules equilibrated to room air, capsules were concentrated near the infusion site, and the pO2 measurement using magnetic resonance relaxometry was 147 ± 9 mm Hg. On day 7 after capsules were dispersed throughout the peritoneal cavity, the pO2 level was 61 ± 11 mm Hg. Measurements using the fiber-optic oxygen sensor were 132 ± 7.5 mm Hg (day 0) and 89 ± 6.1 mm Hg (day 7). Perfluoro-15-crown-5-ether capsules retrieved on day 7 were intact and free-floating without host cell attachment, although the numbers of peritoneal CD20 B cells, CD4 and CD8 T cells, and CD14 macrophages increased consistent with a mild foreign body reaction. CONCLUSIONS The peritoneal pO2 of normal NHPs is relatively low and we predict would decrease further when encapsulated islets are transplanted intraperitoneally.
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Affiliation(s)
| | - Melanie L. Graham
- Preclinical Research Center, Department of Surgery, University of Minnesota, St. Paul, MN
| | - Bradley P. Weegman
- Sylvatica Biotech, Inc., Charleston, SC
- Center for Magnetic Resonance Research, Department of Radiology, University of Minnesota, Minneapolis, MN
| | - Samuel A. Einstein
- Center for Magnetic Resonance Research, Department of Radiology, University of Minnesota, Minneapolis, MN
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - Jody J. Janecek
- Preclinical Research Center, Department of Surgery, University of Minnesota, St. Paul, MN
| | - Lucas A. Mutch
- Preclinical Research Center, Department of Surgery, University of Minnesota, St. Paul, MN
| | - Amar Singh
- Schulze Diabetes Institute, Department of Surgery, University of Minnesota, Minneapolis, MN
| | | | - Michael Garwood
- Center for Magnetic Resonance Research, Department of Radiology, University of Minnesota, Minneapolis, MN
| | | | | | - Bernhard J. Hering
- Schulze Diabetes Institute, Department of Surgery, University of Minnesota, Minneapolis, MN
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19
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Simkins JW, Stewart PS, Codd SL, Seymour JD. Non-invasive imaging of oxygen concentration in a complex in vitro biofilm infection model using 19 F MRI: Persistence of an oxygen sink despite prolonged antibiotic therapy. Magn Reson Med 2019; 82:2248-2256. [PMID: 31373035 DOI: 10.1002/mrm.27888] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 06/11/2019] [Accepted: 06/12/2019] [Indexed: 01/29/2023]
Abstract
PURPOSE Oxygen availability is a critical determinant of microbial biofilm activity and antibiotic susceptibility. However, measuring oxygen gradients in these systems remains difficult, with the standard microelectrode approach being both invasive and limited to single-point measurement. The goal of the study was to develop a 19 F MRI approach for 2D oxygen mapping in biofilm systems and to visualize oxygen consumption behavior in real time during antibiotic therapy. METHODS Oxygen-sensing beads were created by encapsulating an emulsion of oxygen-sensing fluorocarbon into alginate gel. Escherichia coli biofilms were grown in and on the alginate matrix, which was contained inside a packed bed column subjected to nutrient flow, mimicking the complex porous structure of human wound tissue, and subjected to antibiotic challenge. RESULTS The linear relationship between 19 F spin-lattice relaxation rate R1 and local oxygen concentration permitted noninvasive spatial mapping of oxygen distribution in real time over the course of biofilm growth and subsequent antibiotic challenge. This technique was used to visualize persistence of microbial oxygen respiration during continuous gentamicin administration, providing a time series of complete spatial maps detailing the continued bacterial utilization of oxygen during prolonged chemotherapy in an in vitro biofilm model with complex spatial structure. CONCLUSIONS Antibiotic exposure temporarily causes oxygen consumption to enter a pseudosteady state wherein oxygen distribution becomes fixed; oxygen sink expansion resumes quickly after antibiotic clearance. This technique may provide valuable information for future investigations of biofilms by permitting the study of complex geometries (typical of in vivo biofilms) and facilitating noninvasive oxygen measurement.
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Affiliation(s)
- Jeffrey W Simkins
- Center for Biofilm Engineering, Montana State University, Bozeman, Montana.,Department of Chemical and Biological Engineering, Montana State University, Bozeman, Montana
| | - Philip S Stewart
- Center for Biofilm Engineering, Montana State University, Bozeman, Montana.,Department of Chemical and Biological Engineering, Montana State University, Bozeman, Montana
| | - Sarah L Codd
- Center for Biofilm Engineering, Montana State University, Bozeman, Montana.,Department of Mechanical and Industrial Engineering, Montana State University, Bozeman, Montana
| | - Joseph D Seymour
- Center for Biofilm Engineering, Montana State University, Bozeman, Montana.,Department of Chemical and Biological Engineering, Montana State University, Bozeman, Montana
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20
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Vidya Shankar R, Kodibagkar VD. A faster PISTOL for 1 H MR-based quantitative tissue oximetry. NMR IN BIOMEDICINE 2019; 32:e4076. [PMID: 30811753 DOI: 10.1002/nbm.4076] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 11/23/2018] [Accepted: 01/07/2019] [Indexed: 06/09/2023]
Abstract
Quantitative mapping of oxygen tension (pO2 ), noninvasively, could potentially be beneficial in cancer and stroke therapy for monitoring therapy and predicting response to certain therapies. Intracellular pO2 measurements may also prove useful in tracking the health of labeled cells and understanding the dynamics of cell therapy in vivo. Proton Imaging of Siloxanes to map Tissue Oxygenation Levels (PISTOL) is a relatively new oximetry technique that measures the T1 of administered siloxanes such as hexamethyldisiloxane (HMDSO), to map the tissue pO2 at various locations with a temporal resolution of 3.5 minutes. We have now developed a siloxane-selective Look-Locker imaging sequence equipped with an echo planar imaging (EPI) readout to accelerate PISTOL acquisitions. The new tissue oximetry sequence, referred to as PISTOL-LL, enables the mapping of HMDSO T1 , and hence tissue pO2 in under one minute. PISTOL-LL was tested and compared with PISTOL in vitro and in vivo. Both sequences were used to record dynamic changes in pO2 of the rat thigh muscle (healthy Fischer rats, n = 6), and showed similar results (P > 0.05) as the other, with each sequence reporting a significant increase in pO2 (P < 0.05) under hyperoxia compared with steady state normoxia. This study demonstrates the ability of the new sequence in rapidly and accurately mapping the pO2 changes and accelerating quantitative 1 H MR tissue oximetry by approximately 4-fold. The faster PISTOL-LL technique could enable dynamic 1 H oximetry with higher temporal resolution for assesing tissue oxygentation and tracking the health of transplanted cells labeled with siloxane-based probes. With minor modifications, this sequence can be useful for 19 F applications as well.
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Affiliation(s)
- Rohini Vidya Shankar
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA
| | - Vikram D Kodibagkar
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA
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21
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Zhang H, Gutruf P, Meacham K, Montana MC, Zhao X, Chiarelli AM, Vázquez-Guardado A, Norris A, Lu L, Guo Q, Xu C, Wu Y, Zhao H, Ning X, Bai W, Kandela I, Haney CR, Chanda D, Gereau RW, Rogers JA. Wireless, battery-free optoelectronic systems as subdermal implants for local tissue oximetry. SCIENCE ADVANCES 2019; 5:eaaw0873. [PMID: 30873435 PMCID: PMC6408152 DOI: 10.1126/sciadv.aaw0873] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 01/28/2019] [Indexed: 05/18/2023]
Abstract
Monitoring regional tissue oxygenation in animal models and potentially in human subjects can yield insights into the underlying mechanisms of local O2-mediated physiological processes and provide diagnostic and therapeutic guidance for relevant disease states. Existing technologies for tissue oxygenation assessments involve some combination of disadvantages in requirements for physical tethers, anesthetics, and special apparatus, often with confounding effects on the natural behaviors of test subjects. This work introduces an entirely wireless and fully implantable platform incorporating (i) microscale optoelectronics for continuous sensing of local hemoglobin dynamics and (ii) advanced designs in continuous, wireless power delivery and data output for tether-free operation. These features support in vivo, highly localized tissue oximetry at sites of interest, including deep brain regions of mice, on untethered, awake animal models. The results create many opportunities for studying various O2-mediated processes in naturally behaving subjects, with implications in biomedical research and clinical practice.
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Affiliation(s)
- Hao Zhang
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Philipp Gutruf
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
- Department of Biomedical Engineering, University of Arizona, Tucson, AZ 85721, USA
| | - Kathleen Meacham
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Michael C. Montana
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Xingyue Zhao
- Department of Materials Science and Engineering and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- State Key Laboratory of New Ceramics and Fine Processing and School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Antonio M. Chiarelli
- Institute of Advanced Biomedical Technologies and Department of Neuroscience, Imaging and Clinical Sciences, University G. D’Annunzio of Chieti–Pescara, Chieti 66100, Italy
| | - Abraham Vázquez-Guardado
- NanoScience Technology Center, Department of Physics and CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, FL 32826, USA
| | - Aaron Norris
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Luyao Lu
- Department of Materials Science and Engineering and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Qinglei Guo
- Department of Materials Science and Engineering and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Department of Materials Science, Fudan University, Shanghai 200433, China
| | - Chenkai Xu
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Yixin Wu
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Hangbo Zhao
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
| | - Xin Ning
- Department of Materials Science and Engineering and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Wubin Bai
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
- Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
| | - Irawati Kandela
- Developmental Therapeutics Core, Northwestern University, Evanston, IL 60208, USA
- Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
| | - Chad R. Haney
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Chemistry of Life Processes Institute, Northwestern University, Evanston, IL 60208, USA
- Center for Advanced Molecular Imaging, Northwestern University, Evanston, IL 60208, USA
| | - Debashis Chanda
- NanoScience Technology Center, Department of Physics and CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, FL 32826, USA
| | - Robert W. Gereau
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO 63110, USA
- Washington University Pain Center, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - John A. Rogers
- Departments of Materials Science and Engineering, Biomedical Engineering, Neurological Surgery, Chemistry, Mechanical Engineering, Electrical Engineering and Computer Science, Simpson Querrey Institute and Feinberg Medical School, Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL 60208, USA
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22
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Gulyaev MV, Kuznetsova AV, Silachev DN, Danilina TI, Gervits LL, Pirogov YA. Realization of 19F MRI oximetry method using perfluorodecalin. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2019; 32:307-315. [PMID: 30730024 DOI: 10.1007/s10334-019-00739-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 12/23/2018] [Accepted: 01/17/2019] [Indexed: 10/27/2022]
Abstract
OBJECTIVE To identify the technical aspects of the potential use of clinically approved perfluorodecalin (PFD, C10F18) for 19F magnetic resonance imaging (MRI) oximetry method at high magnetic field 7.05 T. MATERIALS AND METHODS 19F T1 measurements were made on a set of PFD samples with different oxygen contents (0%, 21%, and 100%) at room (21 °C) and body temperature (37 °C). In vivo MRI studies were carried out on one healthy rat and two rats with C6 brain glioma. RESULTS The selective excitation of the magnetically equivalent 19F nuclei of CF2 groups of trans-isomer of PFD, which give a doublet at a frequency of about - 140 ppm (in relation the chemical shift of trifluoroacetic acid, which is - 76.55 ppm) should be done for correct implementation of 19F MRI oximetry method. The amount of PFD equal to 30 μl is the optimal for obtaining reliable data on the measured T1 values. In this case, the standard deviation of T1 does not exceed 5%. In vivo MRI studies showed that the values of the partial pressure of oxygen (pO2) decrease from normal values of about 38 mmHg (healthy brain) to almost 0 mmHg at the last stage of tumor growth. CONCLUSION The study showed the feasibility of the successful application of PFD for 19F MRI oximetry method.
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Affiliation(s)
| | | | | | | | - Lev L Gervits
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Moscow, 119991, Russia
| | - Yury A Pirogov
- M.V. Lomonosov Moscow State University, Moscow, 119991, Russia.,National Research Nuclear University MEPhI, Moscow, 115409, Russia
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23
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Kefayat A, Ghahremani F, Motaghi H, Rostami S, Mehrgardi MA. Alive attenuated Salmonella as a cargo shuttle for smart carrying of gold nanoparticles to tumour hypoxic regions. J Drug Target 2018; 27:315-324. [DOI: 10.1080/1061186x.2018.1523417] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Amirhosein Kefayat
- Department of Oncology, Cancer Prevention Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
- Department of Oncology, Seyed Al-Shohada Hospital, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Fatemeh Ghahremani
- Department of Medical Physics & Radiotherapy, School of Medicine, Arak University of Medical Sciences, Arak, Iran
| | - Hasan Motaghi
- Department of Chemistry, University of Isfahan, Isfahan, Iran
| | - Soodabeh Rostami
- Nosocomial Infection Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
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24
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Fathollahipour S, Patil PS, Leipzig ND. Oxygen Regulation in Development: Lessons from Embryogenesis towards Tissue Engineering. Cells Tissues Organs 2018; 205:350-371. [PMID: 30273927 PMCID: PMC6397050 DOI: 10.1159/000493162] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/11/2018] [Indexed: 12/19/2022] Open
Abstract
Oxygen is a vital source of energy necessary to sustain and complete embryonic development. Not only is oxygen the driving force for many cellular functions and metabolism, but it is also involved in regulating stem cell fate, morphogenesis, and organogenesis. Low oxygen levels are the naturally preferred microenvironment for most processes during early development and mainly drive proliferation. Later on, more oxygen and also nutrients are needed for organogenesis and morphogenesis. Therefore, it is critical to maintain oxygen levels within a narrow range as required during development. Modulating oxygen tensions is performed via oxygen homeostasis mainly through the function of hypoxia-inducible factors. Through the function of these factors, oxygen levels are sensed and regulated in different tissues, starting from their embryonic state to adult development. To be able to mimic this process in a tissue engineering setting, it is important to understand the role and levels of oxygen in each developmental stage, from embryonic stem cell differentiation to organogenesis and morphogenesis. Taking lessons from native tissue microenvironments, researchers have explored approaches to control oxygen tensions such as hemoglobin-based, perfluorocarbon-based, and oxygen-generating biomaterials, within synthetic tissue engineering scaffolds and organoids, with the aim of overcoming insufficient or nonuniform oxygen levels and nutrient supply.
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Affiliation(s)
| | - Pritam S Patil
- Department of Chemical and Biomolecular Engineering, University of Akron, Akron, Ohio, USA
| | - Nic D Leipzig
- Department of Chemical and Biomolecular Engineering, University of Akron, Akron, Ohio,
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25
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Simkins JW, Stewart PS, Seymour JD. Spatiotemporal mapping of oxygen in a microbially-impacted packed bed using 19F Nuclear magnetic resonance oximetry. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2018; 293:123-133. [PMID: 29940412 PMCID: PMC6047901 DOI: 10.1016/j.jmr.2018.06.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 06/12/2018] [Accepted: 06/13/2018] [Indexed: 06/08/2023]
Abstract
19F magnetic resonance has been used in the medical field for quantifying oxygenation in blood, tissues, and tumors. The 19F NMR oximetry technique exploits the affinity of molecular oxygen for liquid fluorocarbon phases, and the resulting linear dependence of 19F spin-lattice relaxation rate R1 on local oxygen concentration. Bacterial biofilms, aggregates of bacteria encased in a self-secreted matrix of extracellular polymers, are important in environmental, industrial, and clinical settings and oxygen gradients represent a critical determinant of biofilm function. However, measurement of oxygen distribution in biofilms and biofouled porous media is difficult. Here the ability of 19F NMR oximetry to accurately track oxygen profile development in microbial impacted packed bed systems without impacting oxygen transport is demonstrated. Time-stable and inert fluorocarbon containing particles are designed which act as oxygen reporters in porous media systems. Particles are generated by emulsifying and entrapping perfluorooctylbromide (PFOB) into alginate gel, resulting in oxygen-sensing alginate beads that are then used as the solid matrix of the packed bed. 19F oxygenation maps, when combined with 1H velocity maps, allow for insight into the interplay between fluid dynamics and oxygen transport phenomena in these complex biofouled systems. Spatial maps of oxygen consumption rate constants are calculated. The growth characteristics of two bacteria, a non-biofilm forming Escherichia coli and Staphylococcus epidermidis, a strong biofilm-former, are used to demonstrate the novel data provided by the method.
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Affiliation(s)
- Jeffrey W Simkins
- Center for Biofilm Engineering, Montana State University, 366 Barnard Hall, Bozeman, MT 59715, United States; Department of Chemical and Biological Engineering, Montana State University, 306 Cobleigh Hall, Bozeman, MT 59715, United States.
| | - Philip S Stewart
- Center for Biofilm Engineering, Montana State University, 366 Barnard Hall, Bozeman, MT 59715, United States; Department of Chemical and Biological Engineering, Montana State University, 306 Cobleigh Hall, Bozeman, MT 59715, United States.
| | - Joseph D Seymour
- Center for Biofilm Engineering, Montana State University, 366 Barnard Hall, Bozeman, MT 59715, United States; Department of Chemical and Biological Engineering, Montana State University, 306 Cobleigh Hall, Bozeman, MT 59715, United States.
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26
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Chakraborty R, Sikarwar AS, Hinton M, Dakshinamurti S, Chelikani P. Characterization of GPCR signaling in hypoxia. Methods Cell Biol 2018; 142:101-110. [PMID: 28964329 DOI: 10.1016/bs.mcb.2017.07.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
G protein-coupled receptors (GPCRs) signal in response to various external stimuli including stress. GPCR signaling has been shown to play a critical role in the adaptation of cell response to limited oxygen supply. Hypoxia has been implicated in cardiovascular diseases, human pulmonary arterial responses, and persistent pulmonary hypertension in newborns. One of the key GPCRs implicated in hypoxia is the prostanoid receptor, thromboxane A2 receptor (TP). Hypoxia can affect TP localization, stability, and activity both in vivo and in vitro. To elucidate hypoxia-mediated GPCR signaling in vitro, we lay out a general strategy to perform hypoxic experiments using both primary pulmonary artery smooth muscle cells and TP expressed in HEK293T cells. We describe assay for measuring moderate tissue hypoxia using static cell cultures, monitoring pericellular media oxygen content, and signaling of TP.
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Affiliation(s)
- Raja Chakraborty
- College of Dentistry, Winnipeg, MB, Canada; Manitoba Chemosensory Biology (MCSB) Research Group, University of Manitoba, Winnipeg, MB, Canada; Biology of Breathing Group, Children's Hospital Research Institute of Manitoba, Winnipeg, MB, Canada
| | - Anurag Singh Sikarwar
- College of Dentistry, Winnipeg, MB, Canada; Manitoba Chemosensory Biology (MCSB) Research Group, University of Manitoba, Winnipeg, MB, Canada; Biology of Breathing Group, Children's Hospital Research Institute of Manitoba, Winnipeg, MB, Canada
| | - Martha Hinton
- Biology of Breathing Group, Children's Hospital Research Institute of Manitoba, Winnipeg, MB, Canada; College of Medicine, University of Manitoba, Winnipeg, MB, Canada
| | - Shyamala Dakshinamurti
- Manitoba Chemosensory Biology (MCSB) Research Group, University of Manitoba, Winnipeg, MB, Canada; Biology of Breathing Group, Children's Hospital Research Institute of Manitoba, Winnipeg, MB, Canada; College of Medicine, University of Manitoba, Winnipeg, MB, Canada
| | - Prashen Chelikani
- College of Dentistry, Winnipeg, MB, Canada; Manitoba Chemosensory Biology (MCSB) Research Group, University of Manitoba, Winnipeg, MB, Canada; Biology of Breathing Group, Children's Hospital Research Institute of Manitoba, Winnipeg, MB, Canada.
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27
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Zhou H, Arias-Ramos N, López-Larrubia P, Mason RP, Cerdán S, Pacheco-Torres J. Oxygenation Imaging by Nuclear Magnetic Resonance Methods. Methods Mol Biol 2018; 1718:297-313. [PMID: 29341016 DOI: 10.1007/978-1-4939-7531-0_18] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Oxygen monitoring is a topic of exhaustive research due to its central role in many biological processes, from energy metabolism to gene regulation. The ability to monitor in vivo the physiological distribution and the dynamics of oxygen from subcellular to macroscopic levels is a prerequisite to better understand the mechanisms associated with both normal and disease states (cancer, neurodegeneration, stroke, etc.). This chapter focuses on magnetic resonance imaging (MRI) based techniques to assess oxygenation in vivo. The first methodology uses injected fluorinated agents to provide quantitative pO2 measurements with high precision and suitable spatial and temporal resolution for many applications. The second method exploits changes in endogenous contrasts, i.e., deoxyhemoglobin and oxygen molecules through measurements of T 2* and T 1, in response to an intervention to qualitatively evaluate hypoxia and its potential modulation.
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Affiliation(s)
- Heling Zhou
- Prognostic Imaging Research Laboratory, Department of Radiology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Nuria Arias-Ramos
- Departament de Bioquímica i Biologia Molecular, Unitat de Bioquímica de Biociències, Edifici Cs, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Spain
| | - Pilar López-Larrubia
- Instituto de Investigaciones Biomédicas 'Alberto Sols' C.S.I.C./U.A.M., Madrid, Spain
| | - Ralph P Mason
- Prognostic Imaging Research Laboratory, Department of Radiology, UT Southwestern Medical Center, Dallas, TX, USA
| | - Sebastián Cerdán
- Instituto de Investigaciones Biomédicas 'Alberto Sols' C.S.I.C./U.A.M., Madrid, Spain
| | - Jesús Pacheco-Torres
- Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas, Universidad Miguel Hernández, San Juan de Alicante, Alicante, Spain.
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28
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Neville KE, Bosse TL, Klekos M, Mills JF, Weicksel SE, Waters JS, Tipping M. A novel ex vivo method for measuring whole brain metabolism in model systems. J Neurosci Methods 2017; 296:32-43. [PMID: 29287743 DOI: 10.1016/j.jneumeth.2017.12.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 12/21/2017] [Accepted: 12/24/2017] [Indexed: 01/31/2023]
Abstract
BACKGROUND Many neuronal and glial diseases have been associated with changes in metabolism. Therefore, metabolic reprogramming has become an important area of research to better understand disease at the cellular level, as well as to identify targets for treatment. Model systems are ideal for interrogating metabolic questions in a tissue dependent context. However, while new tools have been developed to study metabolism in cultured cells there has been less progress towards studies in vivo and ex vivo. NEW METHOD We have developed a method using newly designed tissue restraints to adapt the Agilent XFe96 metabolic analyzer for whole brain analysis. These restraints create a chamber for Drosophila brains and other small model system tissues to reside undisrupted, while still remaining in the zone for measurements by sensor probes. RESULTS This method generates reproducible oxygen consumption and extracellular acidification rate data for Drosophila larval and adult brains. Single brains are effectively treated with inhibitors and expected metabolic readings are observed. Measuring metabolic changes, such as glycolytic rate, in transgenic larval brains demonstrates the potential for studying how genotype affects metabolism. COMPARISON WITH EXISTING METHODS AND CONCLUSIONS Current methodology either utilizes whole animal chambers to measure respiration, not allowing for targeted tissue analysis, or uses technically challenging MRI technology for in vivo analysis that is not suitable for smaller model systems. This new method allows for novel metabolic investigation of intact brains and other tissues ex vivo in a quick, and simplistic way with the potential for large-scale studies.
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Affiliation(s)
- Kathryn E Neville
- Department of Biology, Providence College, 1 Cunningham Square, Providence, RI 02918, United States.
| | - Timothy L Bosse
- Department of Biology, Providence College, 1 Cunningham Square, Providence, RI 02918, United States.
| | - Mia Klekos
- Department of Biology, Providence College, 1 Cunningham Square, Providence, RI 02918, United States.
| | - John F Mills
- Department of Biology, Providence College, 1 Cunningham Square, Providence, RI 02918, United States.
| | - Steven E Weicksel
- Department of Biology, Providence College, 1 Cunningham Square, Providence, RI 02918, United States.
| | - James S Waters
- Department of Biology, Providence College, 1 Cunningham Square, Providence, RI 02918, United States.
| | - Marla Tipping
- Department of Biology, Providence College, 1 Cunningham Square, Providence, RI 02918, United States.
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29
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Walsh C, Ovenden N, Stride E, Cheema U. Quantification of cell-bubble interactions in a 3D engineered tissue phantom. Sci Rep 2017; 7:6331. [PMID: 28740100 PMCID: PMC5524813 DOI: 10.1038/s41598-017-06678-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 06/14/2017] [Indexed: 12/23/2022] Open
Abstract
Understanding cell-bubble interactions is crucial for preventing bubble related pathologies and harnessing their potential therapeutic benefits. Bubbles can occur in the body as a result of therapeutic intravenous administration, surgery, infections or decompression. Subsequent interactions with living cells, may result in pathological responses such as decompression sickness (DCS). This work investigates the interactions that occur between bubbles formed during decompression and cells in a 3D engineered tissue phantom. Increasing the tissue phantoms' cellular density resulted in decreased dissolved O2 (DO) concentrations (p = 0.0003) measured using real-time O2 monitoring. Direct microscopic observation of these phantoms, revealed a significant (p = 0.0024) corresponding reduction in bubble nucleation. No significant difference in growth rate or maximum size of the bubbles was measured (p = 0.99 and 0.23). These results show that bubble nucleation is dominated by DO concentration (affected by cellular metabolism), rather than potential nucleation sites provided by cell-surfaces. Consequent bubble growth depends not only on DO concentration but also on competition for dissolved gas. Cell death was found to significantly increase (p = 0.0116) following a bubble-forming decompression. By comparison to 2D experiments; the more biomimetic 3D geometry and extracellular matrix in this work, provide data more applicable for understanding and developing models of in vivo bubble dynamics.
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Affiliation(s)
- C Walsh
- Centre for Mathematics and Physics in the Life Sciences and Experimental Biology (CoMPLEX), UCL Physics Building Gower Street, London, WC1E 6BT, UK.
- UCL Institute of Orthopaedics and Musculoskeletal Science, London, UK.
- Department of Mathematics, University College London, London, UK.
| | - N Ovenden
- Department of Mathematics, University College London, London, UK
| | - E Stride
- Institute of Biomedical Engineering, Old Road Campus Research Building, University of Oxford, Oxford, UK
| | - U Cheema
- UCL Institute of Orthopaedics and Musculoskeletal Science, London, UK
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30
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Xie D, Kim S, Kohli V, Banerjee A, Yu M, Enriquez JS, Luci JJ, Que EL. Hypoxia-Responsive 19F MRI Probes with Improved Redox Properties and Biocompatibility. Inorg Chem 2017; 56:6429-6437. [PMID: 28537705 DOI: 10.1021/acs.inorgchem.7b00500] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
19F magnetic resonance imaging (MRI), an emerging modality in biomedical imaging, has shown promise for in vitro and in vivo preclinical studies. Here we present a series of fluorinated Cu(II)ATSM derivatives for potential use as 19F magnetic resonance agents for sensing cellular hypoxia. The synthesized complexes feature a hypoxia-targeting Cu2+ coordination core, nine equivalent fluorine atoms connected via a variable-length poly(ethylene glycol) linker. Introduction of the fluorine moiety maintains the planar coordination geometry of the Cu2+ center, while the linker length modulates the Cu2+/+ reduction potential, 19F NMR relaxation properties, and lipophilicity. In particular, the 19F NMR relaxation properties were quantitatively evaluated by the Solomon-Bloembergen model, revealing a regular pattern of relaxation enhancement tuned by the distance between Cu2+ and F atoms. Finally, the potential utility of these complexes for sensing reductive environments was demonstrated using both 19F MR phantom imaging and 19F NMR, including experiments in intact live cells.
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Affiliation(s)
- Da Xie
- Department of Chemistry, The University of Texas at Austin , 105 E. 24th Street Stop A5300, Austin, Texas 78712, United States
| | - Seyong Kim
- Department of Chemistry, The University of Texas at Austin , 105 E. 24th Street Stop A5300, Austin, Texas 78712, United States
| | - Vikraant Kohli
- Department of Chemistry, The University of Texas at Austin , 105 E. 24th Street Stop A5300, Austin, Texas 78712, United States
| | - Arnab Banerjee
- Department of Chemistry, The University of Texas at Austin , 105 E. 24th Street Stop A5300, Austin, Texas 78712, United States
| | - Meng Yu
- Department of Chemistry, The University of Texas at Austin , 105 E. 24th Street Stop A5300, Austin, Texas 78712, United States
| | - José S Enriquez
- Department of Chemistry, The University of Texas at Austin , 105 E. 24th Street Stop A5300, Austin, Texas 78712, United States
| | - Jeffrey J Luci
- Department of Neuroscience, The University of Texas at Austin , Austin, Texas 78712, United States.,Imaging Research Center, The University of Texas at Austin , Austin, Texas 78712, United States
| | - Emily L Que
- Department of Chemistry, The University of Texas at Austin , 105 E. 24th Street Stop A5300, Austin, Texas 78712, United States
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31
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Hou H, Khan N, Gohain S, Eskey CJ, Moodie KL, Maurer KJ, Swartz HM, Kuppusamy P. Dynamic EPR Oximetry of Changes in Intracerebral Oxygen Tension During Induced Thromboembolism. Cell Biochem Biophys 2017; 75:285-294. [PMID: 28434138 DOI: 10.1007/s12013-017-0798-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 04/12/2017] [Indexed: 12/19/2022]
Abstract
Cerebral tissue oxygenation (oxygen tension, pO2) is a critical parameter that is closely linked to brain metabolism, function, and pathophysiology. In this work, we have used electron paramagnetic resonance oximetry with a deep-tissue multi-site oxygen-sensing probe, called implantable resonator, to monitor temporal changes in cerebral pO2 simultaneously at four sites in a rabbit model of ischemic stroke induced by embolic clot. The pO2 values in healthy brain were not significantly different among the four sites measured over a period of 4 weeks. During exposure to 15% O2 (hypoxia), a sudden and significant decrease in pO2 was observed in all four sites. On the other hand, brief exposure to breathing carbogen gas (95% O2 + 5% CO2) showed a significant increase in the cerebral pO2 from baseline value. During ischemic stroke, induced by embolic clot in the left brain, a significant decline in the pO2 of the left cortex (ischemic core) was observed without any change in the contralateral sites. While the pO2 in the non-infarct regions returned to baseline at 24-h post-stroke, pO2 in the infarct core was consistently lower compared to the baseline and other regions of the brain. The results demonstrated that electron paramagnetic resonance oximetry with the implantable resonator can repeatedly and simultaneously report temporal changes in cerebral pO2 at multiple sites. This oximetry approach can be used to develop interventions to rescue hypoxic/ischemic tissue by modulating cerebral pO2 during hypoxic and stroke injury.
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Affiliation(s)
- Huagang Hou
- Department of Radiology, The Geisel School of Medicine, Dartmouth College, 1 Medical Center Drive,, Lebanon, 03756, NH, USA
| | - Nadeem Khan
- Department of Radiology, The Geisel School of Medicine, Dartmouth College, 1 Medical Center Drive,, Lebanon, 03756, NH, USA
| | - Sangeeta Gohain
- Department of Radiology, The Geisel School of Medicine, Dartmouth College, 1 Medical Center Drive,, Lebanon, 03756, NH, USA
| | - Clifford J Eskey
- Department of Radiology, The Geisel School of Medicine, Dartmouth College, 1 Medical Center Drive,, Lebanon, 03756, NH, USA
| | - Karen L Moodie
- Center for Comparative Medicine and Research, Dartmouth College, 1 Medical Center Drive,, Lebanon, 03756, NH, USA
| | - Kirk J Maurer
- Center for Comparative Medicine and Research, Dartmouth College, 1 Medical Center Drive,, Lebanon, 03756, NH, USA
| | - Harold M Swartz
- Department of Radiology, The Geisel School of Medicine, Dartmouth College, 1 Medical Center Drive,, Lebanon, 03756, NH, USA
| | - Periannan Kuppusamy
- Department of Radiology, The Geisel School of Medicine, Dartmouth College, 1 Medical Center Drive,, Lebanon, 03756, NH, USA.
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32
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Conway JRW, Warren SC, Timpson P. Context-dependent intravital imaging of therapeutic response using intramolecular FRET biosensors. Methods 2017; 128:78-94. [PMID: 28435000 DOI: 10.1016/j.ymeth.2017.04.014] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 03/13/2017] [Accepted: 04/08/2017] [Indexed: 12/18/2022] Open
Abstract
Intravital microscopy represents a more physiologically relevant method for assessing therapeutic response. However, the movement into an in vivo setting brings with it several additional considerations, the primary being the context in which drug activity is assessed. Microenvironmental factors, such as hypoxia, pH, fibrosis, immune infiltration and stromal interactions have all been shown to have pronounced effects on drug activity in a more complex setting, which is often lost in simpler two- or three-dimensional assays. Here we present a practical guide for the application of intravital microscopy, looking at the available fluorescent reporters and their respective expression systems and analysis considerations. Moving in vivo, we also discuss the microscopy set up and methods available for overlaying microenvironmental context to the experimental readouts. This enables a smooth transition into applying higher fidelity intravital imaging to improve the drug discovery process.
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Affiliation(s)
- James R W Conway
- Garvan Institute of Medical Research and The Kinghorn Cancer Centre, Cancer Division, Sydney, NSW 2010, Australia; St Vincent's Clinical School, Faculty of Medicine, University of NSW, Sydney, NSW 2010, Australia
| | - Sean C Warren
- Garvan Institute of Medical Research and The Kinghorn Cancer Centre, Cancer Division, Sydney, NSW 2010, Australia; St Vincent's Clinical School, Faculty of Medicine, University of NSW, Sydney, NSW 2010, Australia
| | - Paul Timpson
- Garvan Institute of Medical Research and The Kinghorn Cancer Centre, Cancer Division, Sydney, NSW 2010, Australia; St Vincent's Clinical School, Faculty of Medicine, University of NSW, Sydney, NSW 2010, Australia.
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Abstract
OBJECTIVE The aim of this study was to investigate the utility of direct measurement of tissue oxygenation during compartment syndrome (CS) and tourniquet-induced ischemia in a large animal model. We hypothesize that as compartment pressure (CP) rises, circulation within the compartment will decrease resulting in a decreased level of oxygen in the muscle. METHODS This study used a dog model of both CS- and tourniquet-based ischemia. In 15 animals, CS was induced in 1 hind limb with varying degrees of severity using an infusion model. Tourniquet ischemia was induced in the contralateral hind limb for varying durations. The partial pressure of oxygen (PmO2) was continuously monitored using a polarographic oxygen probe in the muscle of both hind limbs. CP was monitored in the CS limb. PmO2 and CP were analyzed after fasciotomy, performed after approximately 7 hours of warm ischemia, or release of tourniquet. RESULTS With the application of tourniquet ischemia, PmO2 fell from 38.40 to 1.30 mm Hg (P < 0.001) and subsequently rose after release of the tourniquet to 39.81 mm Hg (P < 0.001). Elevated CP induced by infusion was relieved by fasciotomy (52.04-11.37 mm Hg postfasciotomy, P < 0.001). PmO2 readings in the infusion model were significantly higher in pre-CS than during CS (31.77 mm Hg vs. 3.88 mm Hg, P < 0.001) and rebounded after fasciotomy (50.24 mm Hg, P < 0.001), consistent with hyperemic response. CONCLUSIONS Increased CP caused an observable decrease in PmO2 that was reversed by fasciotomy. PmO2 can be directly measured in real time with a polarographic tissue pO2 probe. This study is the first step of evaluating an alternative method for diagnosing acute CS.
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Xie D, King TL, Banerjee A, Kohli V, Que EL. Exploiting Copper Redox for 19F Magnetic Resonance-Based Detection of Cellular Hypoxia. J Am Chem Soc 2016; 138:2937-40. [DOI: 10.1021/jacs.5b13215] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Da Xie
- Department of Chemistry, The University of Texas at Austin, 105
E. 24th St Stop A5300, Austin, Texas 78712, United States
| | - Tyler L. King
- Department of Chemistry, The University of Texas at Austin, 105
E. 24th St Stop A5300, Austin, Texas 78712, United States
| | - Arnab Banerjee
- Department of Chemistry, The University of Texas at Austin, 105
E. 24th St Stop A5300, Austin, Texas 78712, United States
| | - Vikraant Kohli
- Department of Chemistry, The University of Texas at Austin, 105
E. 24th St Stop A5300, Austin, Texas 78712, United States
| | - Emily L. Que
- Department of Chemistry, The University of Texas at Austin, 105
E. 24th St Stop A5300, Austin, Texas 78712, United States
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Kegel S, Chacon-Caldera J, Tsagogiorgas C, Theisinger B, Glatting G, Schad LR. 19F Oximetry with semifluorinated alkanes. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2015; 44:1861-1866. [PMID: 26631543 DOI: 10.3109/21691401.2015.1111228] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This work examines the variation of longitudinal relaxation rate R1(= 1/T1) of the 19F-CF3-resonance of semifluorinated alkanes (SFAs) with oxygen tension (pO2), temperature (T) and pH in vitro. Contrary to their related perfluorocarbons (PFCs), SFA are amphiphilic and facilitate stable emulsions, a prerequisite for clinical use. A linear relationship between R1 and pO2 was confirmed for the observed SFAs at different temperatures. Using a standard saturation recovery sequence, T1 has been successfully measured using fluorine 19F-MRI with a self-constructed birdcage resonator at 9.4 T. A calibration curve to calculate pO2 depending on T and R1 was found for each SFA used. In contrast to the commonly used PFC, SFAs are less sensitive to changes in pO2, but more sensitive to changes in temperature. The influence of pH to R1 was found to be negligible.
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Affiliation(s)
- Stefan Kegel
- a Medical Radiation Physics/Radiation Protection, Universitätsmedizin Mannheim, Medical Faculty Mannheim, Heidelberg University , Mannheim , Germany
| | - Jorge Chacon-Caldera
- b Computer Assisted Clinical Medicine, Universitätsmedizin Mannheim, Medical Faculty Mannheim, Heidelberg University , Mannheim , Germany
| | - Charalambos Tsagogiorgas
- c Department of Anaesthesiology and Surgical Intensive Care Medicine , Universitätsmedizin Mannheim, Medical Faculty Mannheim, Heidelberg University , Mannheim , Germany
| | | | - Gerhard Glatting
- a Medical Radiation Physics/Radiation Protection, Universitätsmedizin Mannheim, Medical Faculty Mannheim, Heidelberg University , Mannheim , Germany
| | - Lothar R Schad
- b Computer Assisted Clinical Medicine, Universitätsmedizin Mannheim, Medical Faculty Mannheim, Heidelberg University , Mannheim , Germany
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Khan N, Hou H, Swartz HM, Kuppusamy P. Direct and Repeated Measurement of Heart and Brain Oxygenation Using In Vivo EPR Oximetry. Methods Enzymol 2015; 564:529-52. [PMID: 26477264 DOI: 10.1016/bs.mie.2015.06.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Low level of oxygen (hypoxia) is a critical factor that defines the pathological consequence of several pathophysiologies, particularly ischemia, that usually occur following the blockage of a blood vessel in vital organs, such as brain and heart, or abnormalities in the microvasculature, such as peripheral vascular disease. Therefore, methods that can directly and repeatedly quantify oxygen levels in the brain and heart will significantly improve our understanding of ischemic pathologies. Importantly, such oximetry capability will facilitate the development of strategies to counteract low levels of oxygen and thereby improve outcome following stroke or myocardial infarction. In vivo electron paramagnetic resonance (EPR) oximetry has the capability to monitor tissue oxygen levels in real time. The method has largely been tested and used in experimental animals, although some clinical measurements have been performed. In this chapter, a brief overview of the methodology to repeatedly quantify oxygen levels in the brain and heart of experimental animal models, ranging from mice to swine, is presented. EPR oximetry requires a one-time placement of an oxygen-sensitive probe in the tissue of interest, while the rest of the procedure for reliable, accurate, and repeated measurements of pO2 (partial pressure of oxygen) is noninvasive and can be repeated as often as desired. A multisite oximetry approach can be used to monitor pO2 at many sites simultaneously. Building on significant advances in the application of EPR oximetry in experimental animal models, spectrometers have been developed for use in human subjects. Initial feasibility of pO2 measurement in solid tumors of patients has been successfully demonstrated.
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Affiliation(s)
- Nadeem Khan
- Department of Radiology, EPR Center for the Study of Viable Systems, Geisel School of Medicine at Dartmouth, Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA
| | - Huagang Hou
- Department of Radiology, EPR Center for the Study of Viable Systems, Geisel School of Medicine at Dartmouth, Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA
| | - Harold M Swartz
- Department of Radiology, EPR Center for the Study of Viable Systems, Geisel School of Medicine at Dartmouth, Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA
| | - Periannan Kuppusamy
- Department of Radiology, EPR Center for the Study of Viable Systems, Geisel School of Medicine at Dartmouth, Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA.
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Roussakis E, Li Z, Nichols AJ, Evans CL. Sauerstoffmessung in der Biomedizin - von der Makro- zur Mikroebene. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201410646] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Roussakis E, Li Z, Nichols AJ, Evans CL. Oxygen-Sensing Methods in Biomedicine from the Macroscale to the Microscale. Angew Chem Int Ed Engl 2015; 54:8340-62. [DOI: 10.1002/anie.201410646] [Citation(s) in RCA: 114] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 01/05/2015] [Indexed: 12/15/2022]
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Niendorf T, Pohlmann A, Arakelyan K, Flemming B, Cantow K, Hentschel J, Grosenick D, Ladwig M, Reimann H, Klix S, Waiczies S, Seeliger E. How bold is blood oxygenation level-dependent (BOLD) magnetic resonance imaging of the kidney? Opportunities, challenges and future directions. Acta Physiol (Oxf) 2015; 213:19-38. [PMID: 25204811 DOI: 10.1111/apha.12393] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 07/04/2014] [Accepted: 09/04/2014] [Indexed: 12/11/2022]
Abstract
Renal tissue hypoperfusion and hypoxia are key elements in the pathophysiology of acute kidney injury and its progression to chronic kidney disease. Yet, in vivo assessment of renal haemodynamics and tissue oxygenation remains a challenge. Many of the established approaches are invasive, hence not applicable in humans. Blood oxygenation level-dependent (BOLD) magnetic resonance imaging (MRI) offers an alternative. BOLD-MRI is non-invasive and indicative of renal tissue oxygenation. Nonetheless, recent (pre-) clinical studies revived the question as to how bold renal BOLD-MRI really is. This review aimed to deliver some answers. It is designed to inspire the renal physiology, nephrology and imaging communities to foster explorations into the assessment of renal oxygenation and haemodynamics by exploiting the powers of MRI. For this purpose, the specifics of renal oxygenation and perfusion are outlined. The fundamentals of BOLD-MRI are summarized. The link between tissue oxygenation and the oxygenation-sensitive MR biomarker T2∗ is outlined. The merits and limitations of renal BOLD-MRI in animal and human studies are surveyed together with their clinical implications. Explorations into detailing the relation between renal T2∗ and renal tissue partial pressure of oxygen (pO2 ) are discussed with a focus on factors confounding the T2∗ vs. tissue pO2 relation. Multi-modality in vivo approaches suitable for detailing the role of the confounding factors that govern T2∗ are considered. A schematic approach describing the link between renal perfusion, oxygenation, tissue compartments and renal T2∗ is proposed. Future directions of MRI assessment of renal oxygenation and perfusion are explored.
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Affiliation(s)
- T. Niendorf
- Berlin Ultrahigh Field Facility (B.U.F.F.); Max Delbrück Center for Molecular Medicine; Berlin Germany
| | - A. Pohlmann
- Berlin Ultrahigh Field Facility (B.U.F.F.); Max Delbrück Center for Molecular Medicine; Berlin Germany
| | - K. Arakelyan
- Berlin Ultrahigh Field Facility (B.U.F.F.); Max Delbrück Center for Molecular Medicine; Berlin Germany
- Institute of Physiology and Center for Cardiovascular Research (CCR); Charité - Universitätsmedizin Berlin; Berlin Germany
| | - B. Flemming
- Institute of Physiology and Center for Cardiovascular Research (CCR); Charité - Universitätsmedizin Berlin; Berlin Germany
| | - K. Cantow
- Institute of Physiology and Center for Cardiovascular Research (CCR); Charité - Universitätsmedizin Berlin; Berlin Germany
| | - J. Hentschel
- Berlin Ultrahigh Field Facility (B.U.F.F.); Max Delbrück Center for Molecular Medicine; Berlin Germany
| | - D. Grosenick
- Physikalisch-Technische Bundesanstalt (PTB); Berlin Germany
| | - M. Ladwig
- Institute of Physiology and Center for Cardiovascular Research (CCR); Charité - Universitätsmedizin Berlin; Berlin Germany
| | - H. Reimann
- Berlin Ultrahigh Field Facility (B.U.F.F.); Max Delbrück Center for Molecular Medicine; Berlin Germany
| | - S. Klix
- Berlin Ultrahigh Field Facility (B.U.F.F.); Max Delbrück Center for Molecular Medicine; Berlin Germany
| | - S. Waiczies
- Berlin Ultrahigh Field Facility (B.U.F.F.); Max Delbrück Center for Molecular Medicine; Berlin Germany
| | - E. Seeliger
- Institute of Physiology and Center for Cardiovascular Research (CCR); Charité - Universitätsmedizin Berlin; Berlin Germany
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Bland E, Burg KJL. Fluorescence ratio imaging for oxygen measurement in a tissue engineered construct. J Histotechnol 2013. [DOI: 10.1179/2046023613y.0000000033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Hallac RR, Zhou H, Pidikiti R, Song K, Stojadinovic S, Zhao D, Solberg T, Peschke P, Mason RP. Correlations of noninvasive BOLD and TOLD MRI with pO2 and relevance to tumor radiation response. Magn Reson Med 2013; 71:1863-73. [PMID: 23813468 DOI: 10.1002/mrm.24846] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 05/21/2013] [Accepted: 05/24/2013] [Indexed: 12/21/2022]
Abstract
PURPOSE To examine the potential use of blood oxygenation level dependent (BOLD) and tissue oxygenation level dependent (TOLD) contrast MRI to assess tumor oxygenation and predict radiation response. METHODS BOLD and TOLD MRI were performed on Dunning R3327-AT1 rat prostate tumors during hyperoxic gas breathing challenge at 4.7 T. Animals were divided into two groups. In Group 1 (n = 9), subsequent (19) F MRI based on spin lattice relaxation of hexafluorobenzene reporter molecule provided quantitative oximetry for comparison. For Group 2 rats (n = 13) growth delay following a single dose of 30 Gy was compared with preirradiation BOLD and TOLD assessments. RESULTS Oxygen (100%O2 ) and carbogen (95%O2 /5%CO2 ) challenge elicited similar BOLD, TOLD and pO2 responses. Strong correlations were observed between BOLD or R2* response and quantitative (19) F pO2 measurements. TOLD response showed a general trend with weaker correlation. Irradiation caused a significant tumor growth delay and tumors with larger changes in TOLD and R1 values upon oxygen breathing exhibited significantly increased tumor growth delay. CONCLUSION These results provide further insight into the relationships between oxygen sensitive (BOLD/TOLD) MRI and tumor pO2 . Moreover, a larger increase in R1 response to hyperoxic gas challenge coincided with greater tumor growth delay following irradiation.
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Affiliation(s)
- Rami R Hallac
- Department of Radiology, The University of Texas Southwestern Medical Center, Dallas, Texas, USA
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Yu JX, Hallac RR, Chiguru S, Mason RP. New frontiers and developing applications in 19F NMR. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2013; 70:25-49. [PMID: 23540575 PMCID: PMC3613763 DOI: 10.1016/j.pnmrs.2012.10.001] [Citation(s) in RCA: 142] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Accepted: 10/23/2012] [Indexed: 05/06/2023]
Affiliation(s)
- Jian-Xin Yu
- Laboratory of Prognostic Radiology, Division of Advanced Radiological Sciences, Department of Radiology, UT Southwestern Medical Center, Dallas, Texas
| | - Rami R. Hallac
- Laboratory of Prognostic Radiology, Division of Advanced Radiological Sciences, Department of Radiology, UT Southwestern Medical Center, Dallas, Texas
| | - Srinivas Chiguru
- Laboratory of Prognostic Radiology, Division of Advanced Radiological Sciences, Department of Radiology, UT Southwestern Medical Center, Dallas, Texas
| | - Ralph P. Mason
- Laboratory of Prognostic Radiology, Division of Advanced Radiological Sciences, Department of Radiology, UT Southwestern Medical Center, Dallas, Texas
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Diou O, Tsapis N, Fattal E. Targeted nanotheranostics for personalized cancer therapy. Expert Opin Drug Deliv 2012; 9:1475-87. [DOI: 10.1517/17425247.2012.736486] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Hu L, Chen J, Yang X, Caruthers SD, Lanza GM, Wickline SA. Rapid quantification of oxygen tension in blood flow with a fluorine nanoparticle reporter and a novel blood flow-enhanced-saturation-recovery sequence. Magn Reson Med 2012; 70:176-83. [PMID: 22915328 DOI: 10.1002/mrm.24436] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Revised: 07/01/2012] [Accepted: 07/03/2012] [Indexed: 01/07/2023]
Abstract
We present a novel blood flow-enhanced-saturation-recovery (BESR) sequence, which allows rapid in vivo T1 measurement of blood for both (1)H and (19)F nuclei. BESR sequence is achieved by combining homogeneous spin preparation and time-of-flight image acquisition and therefore preserves high time efficiency and signal-to-noise ratio for (19)F imaging of circulating perfluorocarbon nanoparticles comprising a perfluoro-15-crown-5-ether core and a lipid monolayer (nominal size = 250 nm). The consistency and accuracy of the BESR sequence for measuring T1 of blood was validated experimentally. With a confirmed linear response feature of (19)F R1 with oxygen tension in both salt solution and blood sample, we demonstrated the feasibility of the BESR sequence to quantitatively determine the oxygen tension within mouse left and right ventricles under both normoxia and hyperoxia conditions. Thus, (19)F BESR MRI of circulating perfluorocarbon nanoparticles represents a new approach to noninvasively evaluate intravascular oxygen tension.
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Affiliation(s)
- Lingzhi Hu
- Department of Physics, Washington University, St. Louis, Missouri, USA
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Cheng HLM. Effect of hyperoxia and hypercapnia on tissue oxygen and perfusion response in the normal liver and kidney. PLoS One 2012; 7:e40485. [PMID: 22792349 PMCID: PMC3391313 DOI: 10.1371/journal.pone.0040485] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2012] [Accepted: 06/08/2012] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE Inhalation of air with altered levels of oxygen and carbon dioxide to manipulate tissue oxygenation and perfusion has both therapeutic and diagnostic value. These physiological responses can be measured non-invasively with magnetic resonance (MR) relaxation times. However, interpreting MR measurements is not straight-forward in extra-cranial organs where gas challenge studies have only begun to emerge. Inconsistent results have been reported on MR, likely because different organs respond differently. The objective of this study was to elucidate organ-specific physiological responses to gas challenge underlying MR measurements by investigating oxygenation and perfusion changes in the normal liver and kidney cortex. MATERIALS AND METHODS Gas challenges (100% O(2), 10% CO(2), and carbogen [90% O(2)+10% CO(2)]) interleaved with room air was delivered to rabbits to investigate their effect on tissue oxygenation and perfusion. Real-time fiber-optic measurements of absolute oxygen and relative blood flow were made in the liver and kidney cortex. RESULTS Only the liver demonstrated a vasodilatory response to CO(2). Perfusion changes to other gases were minimal in both organs. Tissue oxygenation measurements showed the liver responding only when CO(2) was present and the kidney only when O(2) was present. CONCLUSION This study reveals distinct physiological response mechanisms to gas challenge in the liver and kidney. The detailed characterization of organ-specific responses is critical to improving our understanding and interpretation of MR measurements in various body organs, and will help broaden the application of MR for non-invasive studies of gas challenges.
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Affiliation(s)
- Hai-Ling Margaret Cheng
- Physiology & Experimental Medicine, The Hospital for Sick Children Research Institute, Toronto, Ontario, Canada.
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Mignion L, Magat J, Schakman O, Marbaix E, Gallez B, Jordan BF. Hexafluorobenzene in comparison with perfluoro-15-crown-5-ether for repeated monitoring of oxygenation using 19F MRI in a mouse model. Magn Reson Med 2012; 69:248-54. [PMID: 22442096 DOI: 10.1002/mrm.24245] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Revised: 02/15/2012] [Accepted: 02/17/2012] [Indexed: 02/03/2023]
Abstract
Hexafluorobenzene (HFB) and perfluoro-15-crown-5-ether (15C5) were compared as fluorine reporter probes of tissue oxygenation using (19)F MRI for dynamic assessment of muscle oxygenation, with special focus on muscle tissue toxicity of the probes, and consecutive alteration of animal behavior. The latter were also compared in terms of sensitivity to changes in oxygenation as well as of signal-to-noise ratio for accurate pO(2) measurements. For that purpose, mouse muscles were imaged at 11.7 T, at 2- and 36-h after intramuscular injection of HFB or 15C5. Histological analysis of the muscle tissue revealed a lack of toxicity for 15C5 from 2 up to 36-h postinjection, whereas HFB induced tissue necrosis, blood clots and thrombosis as soon as 24-h postinjection. This muscle toxicity led to a limitation in mice mobility 24-h after injection of HFB as evidenced by behavioral testing (open-field, grip strength, and catwalk tests), which was not the case after 15C5 intramuscular injection. Finally, pO(2) measurements assessed 2-h postinjection showed consistent values with both probes, evidencing cross-validation of the (19)F MRI oximetry technique for acute measurements. However, the measurement at 36-h was hampered for HFB, which showed significant lower values of muscle pO(2), whereas 15C5 was able to reliably assess muscle pO(2) at 36-h postinjection.
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Affiliation(s)
- Lionel Mignion
- Biomedical Magnetic Resonance Group, Louvain Drug Research Institute, Université Catholique de Louvain, Brussels, Belgium
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Mason RP, Zhao D, Pacheco-Torres J, Cui W, Kodibagkar VD, Gulaka PK, Hao G, Thorpe P, Hahn EW, Peschke P. Multimodality imaging of hypoxia in preclinical settings. THE QUARTERLY JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING : OFFICIAL PUBLICATION OF THE ITALIAN ASSOCIATION OF NUCLEAR MEDICINE (AIMN) [AND] THE INTERNATIONAL ASSOCIATION OF RADIOPHARMACOLOGY (IAR), [AND] SECTION OF THE SOCIETY OF... 2010; 54:259-280. [PMID: 20639813 PMCID: PMC3044928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Hypoxia has long been recognized to influence solid tumor response to therapy. Increasingly, hypoxia has also been implicated in tumor aggressiveness, including growth, development and metastatic potential. Thus, there is a fundamental, as well as a clinical interest, in assessing in situ tumor hypoxia. This review will examine diverse approaches focusing on the preclinical setting, particularly, in rodents. The strategies are inevitably a compromise in terms of sensitivity, precision, temporal and spatial resolution, as well as cost, feasibility, ease and robustness of implementation. We will review capabilities of multiple modalities and examine what makes them particularly suitable for investigating specific aspects of tumor pathophysiology. Current approaches range from nuclear imaging to magnetic resonance and optical, with varying degrees of invasiveness and ability to examine spatial heterogeneity, as well as dynamic response to interventions. Ideally, measurements would be non-invasive, exploiting endogenous reporters to reveal quantitatively local oxygen tension dynamics. A primary focus of this review is magnetic resonance imaging (MRI) based techniques, such as ¹⁹F MRI oximetry, which reveals not only hypoxia in vivo, but more significantly, spatial distribution of pO₂ quantitatively, with a precision relevant to radiobiology. It should be noted that preclinical methods may have very different criteria for acceptance, as compared with potential investigations for prognostic radiology or predictive biomarkers suitable for use in patients.
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Affiliation(s)
- R P Mason
- Department of Radiology, U.T. Southwestern Medical Center, Dallas, TX 75390-9058, USA.
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