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Jansen NA, Cestèle S, Marco SS, Schenke M, Stewart K, Patel J, Tolner EA, Brunklaus A, Mantegazza M, van den Maagdenberg AMJM. Brainstem depolarization-induced lethal apnea associated with gain-of-function SCN1AL263V is prevented by sodium channel blockade. Proc Natl Acad Sci U S A 2024; 121:e2309000121. [PMID: 38547067 PMCID: PMC10998578 DOI: 10.1073/pnas.2309000121] [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: 06/05/2023] [Accepted: 02/21/2024] [Indexed: 04/02/2024] Open
Abstract
Apneic events are frightening but largely benign events that often occur in infants. Here, we report apparent life-threatening apneic events in an infant with the homozygous SCN1AL263V missense mutation, which causes familial hemiplegic migraine type 3 in heterozygous family members, in the absence of epilepsy. Observations consistent with the events in the infant were made in an Scn1aL263V knock-in mouse model, in which apnea was preceded by a large brainstem DC-shift, indicative of profound brainstem depolarization. The L263V mutation caused gain of NaV1.1 function effects in transfected HEK293 cells. Sodium channel blockade mitigated the gain-of-function characteristics, rescued lethal apnea in Scn1aL263V mice, and decreased the frequency of severe apneic events in the patient. Hence, this study shows that SCN1AL263V can cause life-threatening apneic events, which in a mouse model were caused by profound brainstem depolarization. In addition to being potentially relevant to sudden infant death syndrome pathophysiology, these data indicate that sodium channel blockers may be considered therapeutic for apneic events in patients with these and other gain-of-function SCN1A mutations.
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Affiliation(s)
- Nico A. Jansen
- Department of Human Genetics, Leiden University Medical Center, Leiden2333 ZC, The Netherlands
| | - Sandrine Cestèle
- Université Côte d’Azur, Valbonne-Sophia Antipolis06560, France
- Institute of Molecular and Cellular Pharmacology, Valbonne-Sophia Antipolis06560, France
| | - Silvia Sanchez Marco
- Department of Paediatric Neurology, Bristol Royal Hospital for Children, University Hospitals Bristol, BristolBS2 8BJ, United Kingdom
| | - Maarten Schenke
- Department of Human Genetics, Leiden University Medical Center, Leiden2333 ZC, The Netherlands
| | - Kirsty Stewart
- West of Scotland Genetic Services, Queen Elizabeth University Hospital, GlasgowG51 4TF, United Kingdom
| | - Jayesh Patel
- Department of Paediatric Neurology, Bristol Royal Hospital for Children, University Hospitals Bristol, BristolBS2 8BJ, United Kingdom
| | - Else A. Tolner
- Department of Human Genetics, Leiden University Medical Center, Leiden2333 ZC, The Netherlands
- Department of Neurology, Leiden University Medical Center, Leiden2333 ZA, The Netherlands
| | - Andreas Brunklaus
- The Paediatric Neurosciences Research Group, Royal Hospital for Children, GlasgowG51 4TF, United Kingdom
- School of Health and Wellbeing, University of Glasgow, GlasgowG12 8TB, United Kingdom
| | - Massimo Mantegazza
- Université Côte d’Azur, Valbonne-Sophia Antipolis06560, France
- Institute of Molecular and Cellular Pharmacology, Valbonne-Sophia Antipolis06560, France
- Inserm, Valbonne-Sophia Antipolis06560, France
| | - Arn M. J. M. van den Maagdenberg
- Department of Human Genetics, Leiden University Medical Center, Leiden2333 ZC, The Netherlands
- Department of Neurology, Leiden University Medical Center, Leiden2333 ZA, The Netherlands
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Li Y, Yu H, Han X, Pan Y. Analyses of hypoxia-related risk factors and clinical relevance in breast cancer. Front Oncol 2024; 14:1350426. [PMID: 38500661 PMCID: PMC10946248 DOI: 10.3389/fonc.2024.1350426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 02/12/2024] [Indexed: 03/20/2024] Open
Abstract
Introduction Hypoxia plays an important role in the heterogeneity, relapse, metastasis, and drug resistance of breast cancer. In this study, we explored the hypoxia-related biological signatures in different subtypes of breast cancer and identified the key prognostic factors by bioinformatics methods. Methods Based on The Cancer Genome Atlas (TCGA) Breast Cancer datasets, we divided the samples into immune-activated/suppressed populations by single-sample gene set enrichment analysis (ssGSEA) and then used hierarchical clustering to further identify hypoxic/non-hypoxic populations from the immune-suppressed samples. A hypoxia related risk model of breast cancer was constructed. Results Nuclear factor interleukin-3 regulated (NFIL3), serpin family E member 1 (SERPINE1), FOS, biglycan (BGN), epidermal growth factor receptor (EGFR), and sushi-repeat-containing protein, X-linked (SRPX) were identified as key hypoxia-related genes. Margin status, American Joint Committee on Cancer (AJCC) stage, hypoxia status, estrogen receptor/progesterone receptor (ER/PR) status, NFIL3, SERPINE1, EGFR, and risk score were identified as independent prognostic indicators for breast cancer patients. The 3- and 5-year survival curves of the model and immunohistochemical staining on the breast cancer microarray verified the statistical significance and feasibility of our model. Among the different molecular types of breast cancer, ER/PR+ and HER2+ patients might have higher hypoxia-related risk scores. ER/PR-negative samples demonstrated more activated immune-related pathways and better response to most anticancer agents. Discussion Our study revealed a novel risk model and potential feasible prognostic factors for breast cancer and might provide new perspectives for individual breast cancer treatment.
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Affiliation(s)
- Yan Li
- Department of Clinical Oncology, The First Affiliated Hospital of University of Science and Technology of China (USTC), Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
- Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
| | - Haiyang Yu
- Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
| | - Xinghua Han
- Department of Clinical Oncology, The First Affiliated Hospital of University of Science and Technology of China (USTC), Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
| | - Yueyin Pan
- Department of Clinical Oncology, The First Affiliated Hospital of University of Science and Technology of China (USTC), Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
- Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
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Bigos KJA, Quiles CG, Lunj S, Smith DJ, Krause M, Troost EGC, West CM, Hoskin P, Choudhury A. Tumour response to hypoxia: understanding the hypoxic tumour microenvironment to improve treatment outcome in solid tumours. Front Oncol 2024; 14:1331355. [PMID: 38352889 PMCID: PMC10861654 DOI: 10.3389/fonc.2024.1331355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Accepted: 01/08/2024] [Indexed: 02/16/2024] Open
Abstract
Hypoxia is a common feature of solid tumours affecting their biology and response to therapy. One of the main transcription factors activated by hypoxia is hypoxia-inducible factor (HIF), which regulates the expression of genes involved in various aspects of tumourigenesis including proliferative capacity, angiogenesis, immune evasion, metabolic reprogramming, extracellular matrix (ECM) remodelling, and cell migration. This can negatively impact patient outcomes by inducing therapeutic resistance. The importance of hypoxia is clearly demonstrated by continued research into finding clinically relevant hypoxia biomarkers, and hypoxia-targeting therapies. One of the problems is the lack of clinically applicable methods of hypoxia detection, and lack of standardisation. Additionally, a lot of the methods of detecting hypoxia do not take into consideration the complexity of the hypoxic tumour microenvironment (TME). Therefore, this needs further elucidation as approximately 50% of solid tumours are hypoxic. The ECM is important component of the hypoxic TME, and is developed by both cancer associated fibroblasts (CAFs) and tumour cells. However, it is important to distinguish the different roles to develop both biomarkers and novel compounds. Fibronectin (FN), collagen (COL) and hyaluronic acid (HA) are important components of the ECM that create ECM fibres. These fibres are crosslinked by specific enzymes including lysyl oxidase (LOX) which regulates the stiffness of tumours and induces fibrosis. This is partially regulated by HIFs. The review highlights the importance of understanding the role of matrix stiffness in different solid tumours as current data shows contradictory results on the impact on therapeutic resistance. The review also indicates that further research is needed into identifying different CAF subtypes and their exact roles; with some showing pro-tumorigenic capacity and others having anti-tumorigenic roles. This has made it difficult to fully elucidate the role of CAFs within the TME. However, it is clear that this is an important area of research that requires unravelling as current strategies to target CAFs have resulted in worsened prognosis. The role of immune cells within the tumour microenvironment is also discussed as hypoxia has been associated with modulating immune cells to create an anti-tumorigenic environment. Which has led to the development of immunotherapies including PD-L1. These hypoxia-induced changes can confer resistance to conventional therapies, such as chemotherapy, radiotherapy, and immunotherapy. This review summarizes the current knowledge on the impact of hypoxia on the TME and its implications for therapy resistance. It also discusses the potential of hypoxia biomarkers as prognostic and predictive indictors of treatment response, as well as the challenges and opportunities of targeting hypoxia in clinical trials.
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Affiliation(s)
- Kamilla JA. Bigos
- Division of Cancer Sciences, University of Manchester, Manchester, United Kingdom
| | - Conrado G. Quiles
- Division of Cancer Sciences, University of Manchester, Manchester, United Kingdom
| | - Sapna Lunj
- Division of Cancer Sciences, University of Manchester, Manchester, United Kingdom
| | - Danielle J. Smith
- Division of Cancer Sciences, University of Manchester, Manchester, United Kingdom
| | - Mechthild Krause
- German Cancer Consortium (DKTK), partner site Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
- Department of Radiation Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- OncoRay – National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Helmholtz-Zentrum Dresden - Rossendorf, Dresden, Germany
- Translational Radiooncology and Clinical Radiotherapy, Helmholtz-Zentrum Dresden - Rossendorf, Dresden, Germany
- Translational Radiation Oncology, National Center for Tumor Diseases (NCT), Partner Site Dresden, Dresden, Germany
- Translational Radiooncology and Clinical Radiotherapy and Image-guided High Precision Radiotherapy, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- Translational Radiooncology and Clinical Radiotherapy and Image-guided High Precision Radiotherapy, Helmholtz Association / Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany
- School of Medicine, Technische Universitat Dresden, Dresden, Germany
| | - Esther GC. Troost
- OncoRay – National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Helmholtz-Zentrum Dresden - Rossendorf, Dresden, Germany
- Translational Radiation Oncology, National Center for Tumor Diseases (NCT), Partner Site Dresden, Dresden, Germany
- Translational Radiooncology and Clinical Radiotherapy and Image-guided High Precision Radiotherapy, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- Translational Radiooncology and Clinical Radiotherapy and Image-guided High Precision Radiotherapy, Helmholtz Association / Helmholtz-Zentrum Dresden - Rossendorf (HZDR), Dresden, Germany
- School of Medicine, Technische Universitat Dresden, Dresden, Germany
- Department of Radiotherapy and Radiation Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- Institute of Radiooncology – OncoRay, Helmholtz-Zentrum Dresden-Rossendorf, Rossendorf, Germany
| | - Catharine M. West
- Division of Cancer Sciences, University of Manchester, Manchester Academic Health Science Centre, Christie Hospital, Manchester, United Kingdom
| | - Peter Hoskin
- Division of Cancer Sciences, University of Manchester, Manchester, United Kingdom
- Mount Vernon Cancer Centre, Northwood, United Kingdom
| | - Ananya Choudhury
- Division of Cancer Sciences, University of Manchester, Manchester, United Kingdom
- Christie Hospital NHS Foundation Trust, Manchester, Germany
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Torres E, Wang P, Kantesaria S, Jenkins P, DelaBarre L, Cosmo Pizetta D, Froelich T, Steyn L, Tannús A, Papas KK, Sakellariou D, Garwood M. Development of a compact NMR system to measure pO 2 in a tissue-engineered graft. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2023; 357:107578. [PMID: 37952431 PMCID: PMC10787953 DOI: 10.1016/j.jmr.2023.107578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 10/19/2023] [Accepted: 10/25/2023] [Indexed: 11/14/2023]
Abstract
Cellular macroencapsulation devices, known as tissue engineered grafts (TEGs), enable the transplantation of allogeneic cells without the need for life-long systemic immunosuppression. Islet containing TEGs offer promise as a potential functional cure for type 1 diabetes. Previous research has indicated sustained functionality of implanted islets at high density in a TEG requires external supplementary oxygen delivery and an effective tool to monitor TEG oxygen levels. A proven oxygen-measurement approach employs a 19F oxygen probe molecule (a perfluorocarbon) implanted alongside therapeutic cells to enable oxygen- and temperature- dependent NMR relaxometry. Although the approach has proved effective, the clinical translation of 19F oxygen relaxometry for TEG monitoring will be limited by the current inaccessibility and high cost of MRI. Here, we report the development of an affordable, compact, and tabletop 19F NMR relaxometry system for monitoring TEG oxygenation. The system uses a 0.5 T Halbach magnet with a bore diameter (19 cm) capable of accommodating the human arm, a potential site of future TEG implantation. 19F NMR relaxometry was performed while controlling the temperature and oxygenation levels of a TEG using a custom-built perfusion setup. Despite the magnet's nonuniform field, a pulse sequence of broadband adiabatic full-passage pulses enabled accurate 19F longitudinal relaxation rate (R1) measurements in times as short as ∼2 min (R1 vs oxygen partial pressure and temperature (R2 > 0.98)). The estimated sensitivity of R1 to oxygen changes at 0.5 T was 1.62-fold larger than the sensitivity previously reported for 16.4 T. We conclude that TEG oxygenation monitoring with a compact, tabletop 19F NMR relaxometry system appears feasible.
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Affiliation(s)
- Efraín Torres
- Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, Minneapolis, MN, USA; Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN, USA.
| | - Paul Wang
- Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, Minneapolis, MN, USA; Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN, USA.
| | - Saurin Kantesaria
- Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, Minneapolis, MN, USA; Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN, USA.
| | - Parker Jenkins
- Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, Minneapolis, MN, USA; Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN, USA.
| | - Lance DelaBarre
- Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, Minneapolis, MN, USA.
| | - Daniel Cosmo Pizetta
- Centro de Imagens e Espectroscopia por Ressonância Magnética - CIERMag - São Carlos Physics Institute, University of São Paulo - IFSC-USP, São Carlos, Brazil.
| | - Taylor Froelich
- Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, Minneapolis, MN, USA.
| | - Leah Steyn
- Department of Surgery, The University of Arizona, Tucson, AZ, USA.
| | - Alberto Tannús
- Centro de Imagens e Espectroscopia por Ressonância Magnética - CIERMag - São Carlos Physics Institute, University of São Paulo - IFSC-USP, São Carlos, Brazil.
| | | | | | - Michael Garwood
- Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota, Minneapolis, MN, USA.
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Ruan Q, Liu Y, Liao L, Hao J, Jiang Y, Jiang J, Zhang J. Synthesis and Evaluation of 99mTc-Labelled 2-Nitroimidazole Derivatives with Different Linkers for Tumour Hypoxia Imaging. Pharmaceuticals (Basel) 2023; 16:1276. [PMID: 37765084 PMCID: PMC10537343 DOI: 10.3390/ph16091276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 09/02/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
When developing novel radiopharmaceuticals, a linker moiety between the chelator and targeting vector can have a crucial influence on adjusting the affinity of the tracer and its biodistribution in organisms. To develop novel 99mTc-labelled hypoxia imaging radiotracers, in this study, five isocyanide-containing 2-nitroimidazole derivatives with different linkers (L1, L2, L3, L4 and L5) were synthesised and radiolabelled with technetium-99m to obtain five stable 99mTc-complexes ([99mTc]Tc-L1, [99mTc]Tc-L2, [99mTc]Tc-L3, [99mTc]Tc-L4 and [99mTc]Tc-L5). Corresponding rhenium analogues of [99mTc]Tc-L1 were synthesised and suggested the structures of these 99mTc-complexes would be a monovalent cation with a technetium (I) core surrounded by six ligands. [99mTc]Tc-L1 is hydrophilic, while the lipophilicities of [99mTc]Tc-L2, [99mTc]Tc-L3, [99mTc]Tc-L4 and [99mTc]Tc-L5 are close. In vitro cell experiments showed that all five novel 99mTc-complexes had higher uptake in hypoxic cells compared with aerobic cells, which indicates the complexes have good hypoxia selectivity. The biodistribution of the five 99mTc-complexes in S180 tumour-bearing mice showed that they all had certain uptake in the tumours. Among them, [99mTc]Tc-L1 had the highest tumour-to-muscle (4.68 ± 0.44) and tumour-to-blood (3.81 ± 0.46) ratios. The introduction of polyethylene glycol (PEG) chains effectively reduced the lipophilicity and decreased uptake by the liver, intestine and blood but also increased clearance from the tumours. In vivo metabolic studies showed [99mTc]Tc-L1 kept intact and remained stable in tumour, blood and urine at 2 h post-injection. The results of SPECT imaging showed that [99mTc]Tc-L1 had significant tumour uptake at 2 h post-injection, but there was still high uptake in abdominal organs such as the liver and kidney, suggesting that this complex needs to be further optimised before being used for tumour hypoxia imaging.
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Affiliation(s)
- Qing Ruan
- Key Laboratory of Beam Technology of the Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;
- Key Laboratory of Radiopharmaceuticals of the Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Radiopharmaceuticals (National Medical Products Administration), College of Chemistry, Beijing Normal University, Beijing 100875, China; (Y.L.); (L.L.); (J.H.); (Y.J.)
| | - Yitong Liu
- Key Laboratory of Radiopharmaceuticals of the Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Radiopharmaceuticals (National Medical Products Administration), College of Chemistry, Beijing Normal University, Beijing 100875, China; (Y.L.); (L.L.); (J.H.); (Y.J.)
| | - Lihao Liao
- Key Laboratory of Radiopharmaceuticals of the Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Radiopharmaceuticals (National Medical Products Administration), College of Chemistry, Beijing Normal University, Beijing 100875, China; (Y.L.); (L.L.); (J.H.); (Y.J.)
| | - Jinyu Hao
- Key Laboratory of Radiopharmaceuticals of the Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Radiopharmaceuticals (National Medical Products Administration), College of Chemistry, Beijing Normal University, Beijing 100875, China; (Y.L.); (L.L.); (J.H.); (Y.J.)
| | - Yuhao Jiang
- Key Laboratory of Radiopharmaceuticals of the Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Radiopharmaceuticals (National Medical Products Administration), College of Chemistry, Beijing Normal University, Beijing 100875, China; (Y.L.); (L.L.); (J.H.); (Y.J.)
| | - Jianyong Jiang
- Key Laboratory of Beam Technology of the Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;
| | - Junbo Zhang
- Key Laboratory of Radiopharmaceuticals of the Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Radiopharmaceuticals (National Medical Products Administration), College of Chemistry, Beijing Normal University, Beijing 100875, China; (Y.L.); (L.L.); (J.H.); (Y.J.)
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6
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Jufar AH, Evans RG, May CN, Hood SG, Betrie AH, Trask‐Marino A, Bellomo R, Lankadeva YR. The effects of recruitment of renal functional reserve on renal cortical and medullary oxygenation in non-anesthetized sheep. Acta Physiol (Oxf) 2023; 237:e13919. [PMID: 36598336 PMCID: PMC10909474 DOI: 10.1111/apha.13919] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 11/18/2022] [Accepted: 01/02/2023] [Indexed: 01/05/2023]
Abstract
AIM Recruitment of renal functional reserve (RFR) with amino acid loading increases renal blood flow and glomerular filtration rate. However, its effects on renal cortical and medullary oxygenation have not been determined. Accordingly, we tested the effects of recruitment of RFR on renal cortical and medullary oxygenation in non-anesthetized sheep. METHODS Under general anesthesia, we instrumented 10 sheep to enable subsequent continuous measurements of systemic and renal hemodynamics, renal oxygen delivery and consumption, and cortical and medullary tissue oxygen tension (PO2 ). We then measured the effects of recruitment of RFR with an intravenous infusion of 500 ml of a clinically used amino acid solution (10% Synthamin® 17) in the non-anesthetized state. RESULTS Compared with baseline, Synthamin® 17 infusion significantly increased renal oxygen delivery mean ± SD maximum increase: (from 0.79 ± 0.17 to 1.06 ± 0.16 ml/kg/min, p < 0.001), renal oxygen consumption (from 0.08 ± 0.01 to 0.15 ± 0.02 ml/kg/min, p < 0.001), and glomerular filtration rate (+45.2 ± 2.7%, p < 0.001). Renal cortical tissue PO2 increased by a maximum of 26.4 ± 1.1% (p = 0.001) and medullary tissue PO2 increased by a maximum of 23.9 ± 2.8% (p = 0. 001). CONCLUSIONS In non-anesthetized healthy sheep, recruitment of RFR improved renal cortical and medullary oxygenation. These observations might have implications for the use of recruitment of RFR for diagnostic and therapeutic purposes.
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Affiliation(s)
- Alemayehu H. Jufar
- Pre‐Clinical Critical Care UnitFlorey Institute of Neuroscience and Mental Health, University of MelbourneMelbourneVictoriaAustralia
- Cardiovascular Disease Program, Department of PhysiologyBiomedicine Discovery Institute, Monash UniversityMelbourneVictoriaAustralia
| | - Roger G. Evans
- Pre‐Clinical Critical Care UnitFlorey Institute of Neuroscience and Mental Health, University of MelbourneMelbourneVictoriaAustralia
- Cardiovascular Disease Program, Department of PhysiologyBiomedicine Discovery Institute, Monash UniversityMelbourneVictoriaAustralia
| | - Clive N. May
- Pre‐Clinical Critical Care UnitFlorey Institute of Neuroscience and Mental Health, University of MelbourneMelbourneVictoriaAustralia
- Department of Critical CareMelbourne Medical School, University of MelbourneMelbourneVictoriaAustralia
| | - Sally G. Hood
- Pre‐Clinical Critical Care UnitFlorey Institute of Neuroscience and Mental Health, University of MelbourneMelbourneVictoriaAustralia
| | - Ashenafi H. Betrie
- Pre‐Clinical Critical Care UnitFlorey Institute of Neuroscience and Mental Health, University of MelbourneMelbourneVictoriaAustralia
- Melbourne Dementia Research CentreFlorey Institute of Neuroscience and Mental Health, The University of MelbourneMelbourneVictoriaAustralia
| | - Anton Trask‐Marino
- Pre‐Clinical Critical Care UnitFlorey Institute of Neuroscience and Mental Health, University of MelbourneMelbourneVictoriaAustralia
| | - Rinaldo Bellomo
- Pre‐Clinical Critical Care UnitFlorey Institute of Neuroscience and Mental Health, University of MelbourneMelbourneVictoriaAustralia
- Department of Critical CareMelbourne Medical School, University of MelbourneMelbourneVictoriaAustralia
| | - Yugeesh R. Lankadeva
- Pre‐Clinical Critical Care UnitFlorey Institute of Neuroscience and Mental Health, University of MelbourneMelbourneVictoriaAustralia
- Department of Critical CareMelbourne Medical School, University of MelbourneMelbourneVictoriaAustralia
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Raschdorf K, Mohseni A, Hogle K, Cheung A, So K, Manouchehri N, Khalili M, Lingawi S, Grunau B, Kuo C, Christenson J, Shadgan B. Evaluation of transcutaneous near-infrared spectroscopy for early detection of cardiac arrest in an animal model. Sci Rep 2023; 13:4537. [PMID: 36941315 PMCID: PMC10027843 DOI: 10.1038/s41598-023-31637-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 03/15/2023] [Indexed: 03/23/2023] Open
Abstract
Sudden cardiac arrest (SCA) is a leading cause of mortality worldwide. The SCA-to-resuscitation interval is a key determinant of patient outcomes, highlighting the clinical need for reliable and timely detection of SCA. Near-infrared spectroscopy (NIRS), a non-invasive optical technique, may have utility for this application. We investigated transcutaneous NIRS as a method to detect pentobarbital-induced changes during cardiac arrest in eight Yucatan miniature pigs. NIRS measurements during cardiac arrest were compared to invasively acquired carotid blood pressure and partial oxygen pressure (PO2) of spinal cord tissues. We observed statistically significant decreases in mean arterial pressure (MAP) 64.68 mmHg ± 13.08, p < 0.0001), spinal cord PO2 (38.16 mmHg ± 20.04, p = 0.0028), and NIRS-derived tissue oxygen saturation (TSI%) (14.50% ± 3.80, p < 0.0001) from baseline to 5 min after pentobarbital administration. Euthanasia-to-first change in hemodynamics for MAP and TSI (%) were similar [MAP (10.43 ± 4.73 s) vs TSI (%) (12.04 ± 1.85 s), p = 0.3714]. No significant difference was detected between NIRS and blood pressure-derived pulse rates during baseline periods (p > 0.99) and following pentobarbital administration (p = 0.97). Transcutaneous NIRS demonstrated the potential to identify rapid hemodynamic changes due to cardiac arrest in periods similar to invasive indices. We conclude that transcutaneous NIRS monitoring may present a novel, non-invasive approach for SCA detection, which warrants further investigation.
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Affiliation(s)
- Katharina Raschdorf
- International Collaboration on Repair Discoveries (ICORD), University of British Columbia, 818 West 10th Avenue, Vancouver, BC, V5Z 1M9, Canada
- Department of Neuroscience, University of British Columbia, 2215 Wesbrook Mall, Vancouver, BC, V6T 1Z3, Canada
| | - Arman Mohseni
- International Collaboration on Repair Discoveries (ICORD), University of British Columbia, 818 West 10th Avenue, Vancouver, BC, V5Z 1M9, Canada
| | - Kaavya Hogle
- School of Biomedical Engineering (SBME), University of British Columbia, 2222 Health Sciences Mall, Vancouver, BC, V6T 1Z4, Canada
| | - Amanda Cheung
- International Collaboration on Repair Discoveries (ICORD), University of British Columbia, 818 West 10th Avenue, Vancouver, BC, V5Z 1M9, Canada
| | - Kitty So
- International Collaboration on Repair Discoveries (ICORD), University of British Columbia, 818 West 10th Avenue, Vancouver, BC, V5Z 1M9, Canada
| | - Neda Manouchehri
- International Collaboration on Repair Discoveries (ICORD), University of British Columbia, 818 West 10th Avenue, Vancouver, BC, V5Z 1M9, Canada
| | - Mahsa Khalili
- Department of Emergency Medicine, University of British Columbia and St. Paul's Hospital, Vancouver, BC, Canada
| | - Saud Lingawi
- School of Biomedical Engineering (SBME), University of British Columbia, 2222 Health Sciences Mall, Vancouver, BC, V6T 1Z4, Canada
| | - Brian Grunau
- Department of Emergency Medicine, University of British Columbia and St. Paul's Hospital, Vancouver, BC, Canada
| | - Calvin Kuo
- School of Biomedical Engineering (SBME), University of British Columbia, 2222 Health Sciences Mall, Vancouver, BC, V6T 1Z4, Canada
| | - Jim Christenson
- Department of Emergency Medicine, University of British Columbia and St. Paul's Hospital, Vancouver, BC, Canada
| | - Babak Shadgan
- International Collaboration on Repair Discoveries (ICORD), University of British Columbia, 818 West 10th Avenue, Vancouver, BC, V5Z 1M9, Canada.
- Department of Neuroscience, University of British Columbia, 2215 Wesbrook Mall, Vancouver, BC, V6T 1Z3, Canada.
- School of Biomedical Engineering (SBME), University of British Columbia, 2222 Health Sciences Mall, Vancouver, BC, V6T 1Z4, Canada.
- Department of Orthopaedics, University of British Columbia, 2775 Laurel Street, Vancouver, BC, V5Z 1M9, Canada.
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8
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Abou Khouzam R, Lehn JM, Mayr H, Clavien PA, Wallace MB, Ducreux M, Limani P, Chouaib S. Hypoxia, a Targetable Culprit to Counter Pancreatic Cancer Resistance to Therapy. Cancers (Basel) 2023; 15:cancers15041235. [PMID: 36831579 PMCID: PMC9953896 DOI: 10.3390/cancers15041235] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 02/01/2023] [Accepted: 02/02/2023] [Indexed: 02/17/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is the most common type of pancreatic cancer, and it is a disease of dismal prognosis. While immunotherapy has revolutionized the treatment of various solid tumors, it has achieved little success in PDAC. Hypoxia within the stroma-rich tumor microenvironment is associated with resistance to therapies and promotes angiogenesis, giving rise to a chaotic and leaky vasculature that is inefficient at shuttling oxygen and nutrients. Hypoxia and its downstream effectors have been implicated in immune resistance and could be contributing to the lack of response to immunotherapy experienced by patients with PDAC. Paradoxically, increasing evidence has shown hypoxia to augment genomic instability and mutagenesis in cancer, suggesting that hypoxic tumor cells could have increased production of neoantigens that can potentially enable their clearance by cytotoxic immune cells. Strategies aimed at relieving this condition have been on the rise, and one such approach opts for normalizing the tumor vasculature to reverse hypoxia and its downstream support of tumor pathogenesis. An important consideration for the successful implementation of such strategies in the clinic is that not all PDACs are equally hypoxic, therefore hypoxia-detection approaches should be integrated to enable optimal patient selection for achieving improved patient outcomes.
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Affiliation(s)
- Raefa Abou Khouzam
- Thumbay Research Institute for Precision Medicine, Gulf Medical University, Ajman P.O. Box 4184, United Arab Emirates
| | - Jean-Marie Lehn
- Institut de Science et d’Ingénierie Supramoléculaires (ISIS), Université de Strasbourg, 8 Allée Gaspard Monge, F-67000 Strasbourg, France
| | - Hemma Mayr
- Swiss Hepato-Pancreato-Biliary (HPB) and Transplantation Center, University Hospital Zurich, Raemistrasse 100, CH-8091 Zurich, Switzerland
- Department of Surgery & Transplantation, University Hospital Zurich, Raemistrasse 100, CH-8091 Zurich, Switzerland
| | - Pierre-Alain Clavien
- Swiss Hepato-Pancreato-Biliary (HPB) and Transplantation Center, University Hospital Zurich, Raemistrasse 100, CH-8091 Zurich, Switzerland
- Department of Surgery & Transplantation, University Hospital Zurich, Raemistrasse 100, CH-8091 Zurich, Switzerland
| | - Michael Bradley Wallace
- Gastroenterology, Mayo Clinic, Jacksonville, FL 32224, USA
- Division of Gastroenterology and Hepatology, Sheikh Shakhbout Medical City, Abu Dhabi P.O. Box 11001, United Arab Emirates
| | - Michel Ducreux
- Department of Cancer Medicine, Gustave Roussy Cancer Institute, F-94805 Villejuif, France
| | - Perparim Limani
- Swiss Hepato-Pancreato-Biliary (HPB) and Transplantation Center, University Hospital Zurich, Raemistrasse 100, CH-8091 Zurich, Switzerland
- Department of Surgery & Transplantation, University Hospital Zurich, Raemistrasse 100, CH-8091 Zurich, Switzerland
- Correspondence: (P.L.); (S.C.); Tel.: +41-78-859-68-07 (P.L.); +33-(0)1-42-11-45-47 (S.C.)
| | - Salem Chouaib
- Thumbay Research Institute for Precision Medicine, Gulf Medical University, Ajman P.O. Box 4184, United Arab Emirates
- INSERM UMR 1186, Integrative Tumor Immunology and Immunotherapy, Gustave Roussy, Faculty of Medicine, University Paris-Saclay, F-94805 Villejuif, France
- Correspondence: (P.L.); (S.C.); Tel.: +41-78-859-68-07 (P.L.); +33-(0)1-42-11-45-47 (S.C.)
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9
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Sminia P, Guipaud O, Viktorsson K, Ahire V, Baatout S, Boterberg T, Cizkova J, Dostál M, Fernandez-Palomo C, Filipova A, François A, Geiger M, Hunter A, Jassim H, Edin NFJ, Jordan K, Koniarová I, Selvaraj VK, Meade AD, Milliat F, Montoro A, Politis C, Savu D, Sémont A, Tichy A, Válek V, Vogin G. Clinical Radiobiology for Radiation Oncology. RADIOBIOLOGY TEXTBOOK 2023:237-309. [DOI: 10.1007/978-3-031-18810-7_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
AbstractThis chapter is focused on radiobiological aspects at the molecular, cellular, and tissue level which are relevant for the clinical use of ionizing radiation (IR) in cancer therapy. For radiation oncology, it is critical to find a balance, i.e., the therapeutic window, between the probability of tumor control and the probability of side effects caused by radiation injury to the healthy tissues and organs. An overview is given about modern precision radiotherapy (RT) techniques, which allow optimal sparing of healthy tissues. Biological factors determining the width of the therapeutic window are explained. The role of the six typical radiobiological phenomena determining the response of both malignant and normal tissues in the clinic, the 6R’s, which are Reoxygenation, Redistribution, Repopulation, Repair, Radiosensitivity, and Reactivation of the immune system, is discussed. Information is provided on tumor characteristics, for example, tumor type, growth kinetics, hypoxia, aberrant molecular signaling pathways, cancer stem cells and their impact on the response to RT. The role of the tumor microenvironment and microbiota is described and the effects of radiation on the immune system including the abscopal effect phenomenon are outlined. A summary is given on tumor diagnosis, response prediction via biomarkers, genetics, and radiomics, and ways to selectively enhance the RT response in tumors. Furthermore, we describe acute and late normal tissue reactions following exposure to radiation: cellular aspects, tissue kinetics, latency periods, permanent or transient injury, and histopathology. Details are also given on the differential effect on tumor and late responding healthy tissues following fractionated and low dose rate irradiation as well as the effect of whole-body exposure.
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10
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Houlihan OA, Workman G, Hounsell AR, Prise KM, Jain S. In vivo dosimetry in pelvic brachytherapy. Br J Radiol 2022; 95:20220046. [PMID: 35635803 PMCID: PMC10996950 DOI: 10.1259/bjr.20220046] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 05/06/2022] [Accepted: 05/11/2022] [Indexed: 11/05/2022] Open
Abstract
ADVANCES IN KNOWLEDGE This paper describes the potential role for in vivo dosimetry in the reduction of uncertainties in pelvic brachytherapy, the pertinent factors for consideration in clinical practice, and the future potential for in vivo dosimetry in the personalisation of brachytherapy.
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Affiliation(s)
- Orla Anne Houlihan
- Department of Clinical Oncology, Northern Ireland Cancer
Centre, Belfast Health and Social Care Trust,
Belfast, UK
- Patrick G. Johnston Centre for Cancer Research, Queen's
University Belfast, Belfast,
UK
| | - Geraldine Workman
- Radiotherapy Physics, Northern Ireland Cancer Centre, Belfast
Health and Social Care Trust,
Belfast, UK
| | - Alan R Hounsell
- Patrick G. Johnston Centre for Cancer Research, Queen's
University Belfast, Belfast,
UK
- Radiotherapy Physics, Northern Ireland Cancer Centre, Belfast
Health and Social Care Trust,
Belfast, UK
| | - Kevin M Prise
- Patrick G. Johnston Centre for Cancer Research, Queen's
University Belfast, Belfast,
UK
| | - Suneil Jain
- Department of Clinical Oncology, Northern Ireland Cancer
Centre, Belfast Health and Social Care Trust,
Belfast, UK
- Patrick G. Johnston Centre for Cancer Research, Queen's
University Belfast, Belfast,
UK
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11
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Tumoral Oxygenation and Biodistribution of Lonidamine Oxygen Microbubbles Following Localized Ultrasound-Triggered Delivery. Int J Pharm 2022; 625:122072. [PMID: 35932933 DOI: 10.1016/j.ijpharm.2022.122072] [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: 05/03/2022] [Revised: 07/27/2022] [Accepted: 07/30/2022] [Indexed: 12/24/2022]
Abstract
Prior work has shown that microbubble-assisted delivery of oxygen improves tumor oxygenation and radiosensitivity, albeit over a limited duration. Lonidamine (LND) has been investigated because of its ability to stimulate glycolysis, lactate production, inhibit mitochondrial respiration, and inhibit oxygen consumption rates in tumors but suffers from poor bioavailability. The goal of this work was to characterize LND-loaded oxygen microbubbles and assess their ability to oxygenate a human head and neck squamous cell carcinoma (HNSCC) tumor model, while also assessing LND biodistribution. In tumors treated with surfactant-shelled microbubbles with oxygen core (SE61O2) and ultrasound, pO2 levels increased to a peak 19.5±9.7 mmHg, 50 seconds after injection and returning to baseline after 120 seconds. In comparison, in tumors treated with SE61O2/LND and ultrasound, pO2 levels showed a peak increase of 29.0±8.3 mmHg, which was achieved 70 seconds after injection returning to baseline after 300 seconds (p<0.001). The co-delivery of O2andLNDvia SE61 also showed an improvement of LND biodistribution in both plasma and tumor tissues (p<0.001). In summary, ultrasound-sensitive microbubbles loaded with O2 and LND provided prolonged oxygenation relative to oxygenated microbubbles alone, as well as provided an ability to locally deliver LND, making them more appropriate for clinical translation.
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12
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Jufar AH, May CN, Evans RG, Cochrane AD, Marino B, Hood SG, McCall PR, Bellomo R, Lankadeva YR. Influence of moderate-hypothermia on renal and cerebral haemodynamics and oxygenation during experimental cardiopulmonary bypass in sheep. Acta Physiol (Oxf) 2022; 236:e13860. [PMID: 35862484 DOI: 10.1111/apha.13860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 07/11/2022] [Accepted: 07/18/2022] [Indexed: 11/01/2022]
Abstract
AIM Cardiac surgery requiring cardiopulmonary bypass (CPB) can result in renal and cerebral injury. Intra-operative tissue hypoxia could contribute to such organ injury. Hypothermia, however, may alleviate organ hypoxia. Therefore, we tested whether moderate-hypothermia (30o C) improves cerebral and renal tissue perfusion and oxygenation during ovine CPB. METHODS Ten sheep were studied while conscious, under stable anaesthesia and during 3 hours of CPB. In a randomised within-animal cross-over design, 5 sheep commenced CPB at a target body temperature of 30 o C (moderate-hypothermia). After 90 minutes, body temperature was increased to 36 o C (standard-procedure). The remaining 5 sheep were randomised to the opposite order of target body temperature. RESULTS Compared with the standard-procedure, moderately-hypothermic CPB reduced renal oxygen delivery (-34.8 ± 19.6%, P = 0.003) and renal oxygen consumption (-42.7 ± 35.2%, P = 0.04). Nevertheless, moderately-hypothermic CPB did not significantly alter either renal cortical or medullary tissue PO2 . Moderately-hypothermic CPB also did not significantly alter cerebral perfusion, cerebral tissue PO2 , or cerebral oxygen saturation compared with the standard-procedure. Compared with anaesthetised state, standard-procedure reduced renal medullary PO2 (-21.0 ± 13.8 mmHg, P = 0.014) and cerebral oxygen saturation (65.0 ± 7.0 to 55.4 ± 9.6%, P = 0.022) but did not significantly alter either renal cortical or cerebral PO2 . CONCLUSION Ovine experimental CPB leads to renal medullary tissue hypoxia. Moderately-hypothermic CPB did not improve cerebral or renal tissue oxygenation. In the kidney, this is probably because renal tissue oxygen consumption is matched by reduced renal oxygen delivery.
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Affiliation(s)
- Alemayehu H Jufar
- Pre-Clinical Critical Care Unit, Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, Victoria, Australia.,Cardiovascular Disease Program, Biomedicine Discovery Institute and Department of Physiology, Monash University, Melbourne, Victoria, Australia
| | - Clive N May
- Pre-Clinical Critical Care Unit, Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, Victoria, Australia.,Department of Critical Care, Melbourne Medical School, University of Melbourne, Victoria, Australia
| | - Roger G Evans
- Pre-Clinical Critical Care Unit, Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, Victoria, Australia.,Cardiovascular Disease Program, Biomedicine Discovery Institute and Department of Physiology, Monash University, Melbourne, Victoria, Australia
| | - Andrew D Cochrane
- Department of Cardiothoracic Surgery, Monash Health and Department of Surgery (School of Clinical Sciences at Monash Health), Monash University, Melbourne, Victoria, Australia
| | - Bruno Marino
- Cellsaving and Perfusion Resources, Melbourne, Victoria, Australia
| | - Sally G Hood
- Pre-Clinical Critical Care Unit, Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, Victoria, Australia
| | - Peter R McCall
- Department of Anaesthesia, Austin Health, Heidelberg, Victoria, Australia
| | - Rinaldo Bellomo
- Pre-Clinical Critical Care Unit, Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, Victoria, Australia.,Department of Critical Care, Melbourne Medical School, University of Melbourne, Victoria, Australia
| | - Yugeesh R Lankadeva
- Pre-Clinical Critical Care Unit, Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, Victoria, Australia.,Department of Critical Care, Melbourne Medical School, University of Melbourne, Victoria, Australia
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13
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Gallez B. The Role of Imaging Biomarkers to Guide Pharmacological Interventions Targeting Tumor Hypoxia. Front Pharmacol 2022; 13:853568. [PMID: 35910347 PMCID: PMC9335493 DOI: 10.3389/fphar.2022.853568] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 06/23/2022] [Indexed: 12/12/2022] Open
Abstract
Hypoxia is a common feature of solid tumors that contributes to angiogenesis, invasiveness, metastasis, altered metabolism and genomic instability. As hypoxia is a major actor in tumor progression and resistance to radiotherapy, chemotherapy and immunotherapy, multiple approaches have emerged to target tumor hypoxia. It includes among others pharmacological interventions designed to alleviate tumor hypoxia at the time of radiation therapy, prodrugs that are selectively activated in hypoxic cells or inhibitors of molecular targets involved in hypoxic cell survival (i.e., hypoxia inducible factors HIFs, PI3K/AKT/mTOR pathway, unfolded protein response). While numerous strategies were successful in pre-clinical models, their translation in the clinical practice has been disappointing so far. This therapeutic failure often results from the absence of appropriate stratification of patients that could benefit from targeted interventions. Companion diagnostics may help at different levels of the research and development, and in matching a patient to a specific intervention targeting hypoxia. In this review, we discuss the relative merits of the existing hypoxia biomarkers, their current status and the challenges for their future validation as companion diagnostics adapted to the nature of the intervention.
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Affiliation(s)
- Bernard Gallez
- Biomedical Magnetic Resonance Research Group, Louvain Drug Research Institute, Université Catholique de Louvain (UCLouvain), Brussels, Belgium
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14
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Time of ovulation in sows is not related to intravaginal dissolved oxygen levels or temperature. Livest Sci 2022. [DOI: 10.1016/j.livsci.2022.104926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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Gross DA, Cheng HS, Zhuang R, McCoy MG, Pérez-Cremades D, Salyers Z, Wara AKMK, Haemmig S, Ryan TE, Feinberg MW. Deficiency of lncRNA SNHG12 impairs ischemic limb neovascularization by altering an endothelial cell cycle pathway. JCI Insight 2021; 7:150761. [PMID: 34793334 PMCID: PMC8765056 DOI: 10.1172/jci.insight.150761] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 11/17/2021] [Indexed: 01/10/2023] Open
Abstract
SNHG12, a long noncoding RNA (lncRNA) dysregulated in atherosclerosis, is known to be a key regulator of vascular senescence in endothelial cells (ECs). However, its role in angiogenesis and peripheral artery disease has not been elucidated. Hind-limb ischemia studies using femoral artery ligation (FAL) in mice showed that SNHG12 expression falls readily in the acute phase of the response to limb ischemia in gastrocnemius muscle and recovers to normal when blood flow recovery is restored to ischemic muscle, indicating that it likely plays a role in the angiogenic response to ischemia. Gain- and loss-of-function studies demonstrated that SNHG12 regulated angiogenesis — SNHG12 deficiency reduced cell proliferation, migration, and endothelial sprouting, whereas overexpression promoted these angiogenic functions. We identified SNHG12 binding partners by proteomics that may contribute to its role in angiogenesis, including IGF-2 mRNA–binding protein 3 (IGF2BP3, also known as IMP3). RNA-Seq profiling of SNHG12-deficient ECs showed effects on angiogenesis pathways and identified a strong effect on cell cycle regulation, which may be modulated by IMP3. Knockdown of SNHG12 in mice undergoing FAL using injected gapmeRs) decreased angiogenesis, an effect that was more pronounced in a model of insulin-resistant db/db mice. RNA-Seq profiling of the EC and non-EC compartments in these mice revealed a likely role of SNHG12 knockdown on Wnt, Notch, and angiopoietin signaling pathways. Together, these findings indicate that SNHG12 plays an important role in the angiogenic EC response to ischemia.
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Affiliation(s)
- David A Gross
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, United States of America
| | - Henry S Cheng
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, United States of America
| | - Rulin Zhuang
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, United States of America
| | - Michael G McCoy
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, United States of America
| | - Daniel Pérez-Cremades
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, United States of America
| | - Zachary Salyers
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, United States of America
| | - A K M Khyrul Wara
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, United States of America
| | - Stefan Haemmig
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, United States of America
| | - Terence E Ryan
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, United States of America
| | - Mark W Feinberg
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, United States of America
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16
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Schaner PE, Williams BB, Chen EY, Pettus JR, Schreiber WA, Kmiec MM, Jarvis LA, Pastel DA, Zuurbier RA, DiFlorio-Alexander RM, Paydarfar JA, Gosselin BJ, Barth RJ, Rosenkranz KM, Petryakov SV, Hou H, Tse D, Pletnev A, Flood AB, Wood VA, Hebert KA, Mosher RE, Demidenko E, Swartz HM, Kuppusamy P. First-In-Human Study in Cancer Patients Establishing the Feasibility of Oxygen Measurements in Tumors Using Electron Paramagnetic Resonance With the OxyChip. Front Oncol 2021; 11:743256. [PMID: 34660306 PMCID: PMC8517507 DOI: 10.3389/fonc.2021.743256] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 09/07/2021] [Indexed: 01/23/2023] Open
Abstract
OBJECTIVE The overall objective of this clinical study was to validate an implantable oxygen sensor, called the 'OxyChip', as a clinically feasible technology that would allow individualized tumor-oxygen assessments in cancer patients prior to and during hypoxia-modification interventions such as hyperoxygen breathing. METHODS Patients with any solid tumor at ≤3-cm depth from the skin-surface scheduled to undergo surgical resection (with or without neoadjuvant therapy) were considered eligible for the study. The OxyChip was implanted in the tumor and subsequently removed during standard-of-care surgery. Partial pressure of oxygen (pO2) at the implant location was assessed using electron paramagnetic resonance (EPR) oximetry. RESULTS Twenty-three cancer patients underwent OxyChip implantation in their tumors. Six patients received neoadjuvant therapy while the OxyChip was implanted. Median implant duration was 30 days (range 4-128 days). Forty-five successful oxygen measurements were made in 15 patients. Baseline pO2 values were variable with overall median 15.7 mmHg (range 0.6-73.1 mmHg); 33% of the values were below 10 mmHg. After hyperoxygenation, the overall median pO2 was 31.8 mmHg (range 1.5-144.6 mmHg). In 83% of the measurements, there was a statistically significant (p ≤ 0.05) response to hyperoxygenation. CONCLUSIONS Measurement of baseline pO2 and response to hyperoxygenation using EPR oximetry with the OxyChip is clinically feasible in a variety of tumor types. Tumor oxygen at baseline differed significantly among patients. Although most tumors responded to a hyperoxygenation intervention, some were non-responders. These data demonstrated the need for individualized assessment of tumor oxygenation in the context of planned hyperoxygenation interventions to optimize clinical outcomes.
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Affiliation(s)
- Philip E. Schaner
- Department of Medicine, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Benjamin B. Williams
- Department of Medicine, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
- Department of Radiology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Eunice Y. Chen
- Department of Surgery, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Jason R. Pettus
- Department of Pathology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Wilson A. Schreiber
- Department of Radiology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Maciej M. Kmiec
- Department of Radiology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Lesley A. Jarvis
- Department of Medicine, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - David A. Pastel
- Department of Radiology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Rebecca A. Zuurbier
- Department of Radiology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Roberta M. DiFlorio-Alexander
- Department of Radiology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Joseph A. Paydarfar
- Department of Surgery, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Benoit J. Gosselin
- Department of Surgery, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Richard J. Barth
- Department of Surgery, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Kari M. Rosenkranz
- Department of Surgery, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Sergey V. Petryakov
- Department of Radiology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Huagang Hou
- Department of Radiology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Dan Tse
- Department of Radiology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Alexandre Pletnev
- Department of Chemistry, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Ann Barry Flood
- Department of Radiology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Victoria A. Wood
- Department of Radiology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Kendra A. Hebert
- Department of Radiology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Robyn E. Mosher
- Department of Radiology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Eugene Demidenko
- Department of Biomedical Data Science, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Harold M. Swartz
- Department of Radiology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
| | - Periannan Kuppusamy
- Department of Medicine, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
- Department of Radiology, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
- Department of Chemistry, Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth College, and Dartmouth-Hitchcock Medical Center, Lebanon, NH, United States
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17
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Therapeutic Modification of Hypoxia. Clin Oncol (R Coll Radiol) 2021; 33:e492-e509. [PMID: 34535359 DOI: 10.1016/j.clon.2021.08.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 08/04/2021] [Accepted: 08/27/2021] [Indexed: 12/30/2022]
Abstract
Regions of reduced oxygenation (hypoxia) are a characteristic feature of virtually all animal and human solid tumours. Numerous preclinical studies, both in vitro and in vivo, have shown that decreasing oxygen concentration induces resistance to radiation. Importantly, hypoxia in human tumours is a negative indicator of radiotherapy outcome. Hypoxia also contributes to resistance to other cancer therapeutics, including immunotherapy, and increases malignant progression as well as cancer cell dissemination. Consequently, substantial effort has been made to detect hypoxia in human tumours and identify realistic approaches to overcome hypoxia and improve cancer therapy outcomes. Hypoxia-targeting strategies include improving oxygen availability, sensitising hypoxic cells to radiation, preferentially killing these cells, locating the hypoxic regions in tumours and increasing the radiation dose to those areas, or applying high energy transfer radiation, which is less affected by hypoxia. Despite numerous clinical studies with each of these hypoxia-modifying approaches, many of which improved both local tumour control and overall survival, hypoxic modification has not been established in routine clinical practice. Here we review the background and significance of hypoxia, how it can be imaged clinically and focus on the various hypoxia-modifying techniques that have undergone, or are currently in, clinical evaluation.
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18
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Oller L, Bennett KA, McKnight JC, Moss SE, Milne R, Hall AJ, Rocha J. Partial pressure of oxygen in adipose tissue and its relationship with fatness in a natural animal model of extreme fat deposition, the grey seal. Physiol Rep 2021; 9:e14972. [PMID: 34409768 PMCID: PMC8374385 DOI: 10.14814/phy2.14972] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Accepted: 06/24/2021] [Indexed: 12/18/2022] Open
Abstract
Excessive adiposity is associated with altered oxygen tension and comorbidities in humans. In contrast, marine mammals have high adiposity with no apparent detrimental effects. However, partial pressure of oxygen (Po2 ) in their subcutaneous adipose tissue (blubber) and its relationship with fatness have not been reported. We measured Po2 and temperature at different blubber depths in 12 healthy juvenile grey seals. Fatness was estimated from blubber thickness and morphometric parameters. Simultaneously, we monitored breathing pattern; heart rate and arterial blood saturation with a pulse oximeter; and relative changes in total hemoglobin, deoxyhemoglobin, and oxyhemoglobin in blubber capillaries using near-infrared spectroscopy (NIRS) as proxies for local oxygenation changes. Blubber Po2 ranged from 14.5 to 71.4 mmHg (39.2 ± 14.1 mmHg), which is similar to values reported in other species. Blubber Po2 was strongly and negatively associated with fatness (LME: p < 0.0001, R2marginal = 0.53, R2conditional = 0.64, n = 10), but not with blubber depth. No other parameters explained variability in Po2 , suggesting arterial blood and local oxygen delivery did not vary within and between measurements. The fall in blubber Po2 with increased fatness in seals is consistent with other animal models of rapid fat deposition. However, the Po2 levels at which blubber becomes hypoxic and consequences of low blubber Po2 for its health and function, particularly in very fat individuals, remain unknown. How seals avoid detrimental effects of low oxygen tension in adipose tissue, despite their high and fluctuating adiposity, is a fruitful avenue to explore.
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Affiliation(s)
- Laura Oller
- Division of Health SciencesSchool of Applied SciencesAbertay UniversityDundeeUK
| | | | - J. Chris McKnight
- Sea Mammal Research UnitScottish Oceans InstituteUniversity of St AndrewsSt AndrewsUK
| | - Simon E.W. Moss
- Sea Mammal Research UnitScottish Oceans InstituteUniversity of St AndrewsSt AndrewsUK
| | - Ryan Milne
- Sea Mammal Research UnitScottish Oceans InstituteUniversity of St AndrewsSt AndrewsUK
| | - Ailsa J. Hall
- Sea Mammal Research UnitScottish Oceans InstituteUniversity of St AndrewsSt AndrewsUK
| | - Joel Rocha
- Division of Sports and Exercise SciencesSchool of Applied SciencesAbertay UniversityDundeeUK
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19
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Ischemia-Reperfusion Injuries Assessment during Pancreas Preservation. Int J Mol Sci 2021; 22:ijms22105172. [PMID: 34068301 PMCID: PMC8153272 DOI: 10.3390/ijms22105172] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 04/25/2021] [Accepted: 05/10/2021] [Indexed: 12/20/2022] Open
Abstract
Maintaining organ viability between donation and transplantation is of critical importance for optimal graft function and survival. To date in pancreas transplantation, static cold storage (SCS) is the most widely practiced method of organ preservation. The first experiments in ex vivo perfusion of the pancreas were performed at the beginning of the 20th century. These perfusions led to organ oedema, hemorrhage, and venous congestion after revascularization. Despite these early hurdles, a number of factors now favor the use of perfusion during preservation: the encouraging results of HMP in kidney transplantation, the development of new perfusion solutions, and the development of organ perfusion machines for the lung, heart, kidneys and liver. This has led to a resurgence of research in machine perfusion for whole organ pancreas preservation. This review highlights the ischemia-reperfusion injuries assessment during ex vivo pancreas perfusion, both for assessment in pre-clinical experimental models as well for future use in the clinic. We evaluated perfusion dynamics, oedema assessment, especially by impedance analysis and MRI, whole organ oxygen consumption, tissue oxygen tension, metabolite concentrations in tissue and perfusate, mitochondrial respiration, cell death, especially by histology, total cell free DNA, caspase activation, and exocrine and endocrine assessment.
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20
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Pawelke J, Brand M, Hans S, Hideghéty K, Karsch L, Lessmann E, Löck S, Schürer M, Szabó ER, Beyreuther E. Electron dose rate and oxygen depletion protect zebrafish embryos from radiation damage. Radiother Oncol 2021; 158:7-12. [DOI: 10.1016/j.radonc.2021.02.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 01/29/2021] [Accepted: 02/01/2021] [Indexed: 10/22/2022]
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21
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Cifarelli V, Beeman SC, Smith GI, Yoshino J, Morozov D, Beals JW, Kayser BD, Watrous JD, Jain M, Patterson BW, Klein S. Decreased adipose tissue oxygenation associates with insulin resistance in individuals with obesity. J Clin Invest 2021; 130:6688-6699. [PMID: 33164985 DOI: 10.1172/jci141828] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 08/26/2020] [Indexed: 12/13/2022] Open
Abstract
BACKGROUNDData from studies conducted in rodent models have shown that decreased adipose tissue (AT) oxygenation is involved in the pathogenesis of obesity-induced insulin resistance. Here, we evaluated the potential influence of AT oxygenation on AT biology and insulin sensitivity in people.METHODSWe evaluated subcutaneous AT oxygen partial pressure (pO2); liver and whole-body insulin sensitivity; AT expression of genes and pathways involved in inflammation, fibrosis, and branched-chain amino acid (BCAA) catabolism; systemic markers of inflammation; and plasma BCAA concentrations, in 3 groups of participants that were rigorously stratified by adiposity and insulin sensitivity: metabolically healthy lean (MHL; n = 11), metabolically healthy obese (MHO; n = 15), and metabolically unhealthy obese (MUO; n = 20).RESULTSAT pO2 progressively declined from the MHL to the MHO to the MUO group, and was positively associated with hepatic and whole-body insulin sensitivity. AT pO2 was positively associated with the expression of genes involved in BCAA catabolism, in conjunction with an inverse relationship between AT pO2 and plasma BCAA concentrations. AT pO2 was negatively associated with AT gene expression of markers of inflammation and fibrosis. Plasma PAI-1 increased from the MHL to the MHO to the MUO group and was negatively correlated with AT pO2, whereas the plasma concentrations of other cytokines and chemokines were not different among the MHL and MUO groups.CONCLUSIONThese results support the notion that reduced AT oxygenation in individuals with obesity contributes to insulin resistance by increasing plasma PAI-1 concentrations and decreasing AT BCAA catabolism and thereby increasing plasma BCAA concentrations.TRIAL REGISTRATIONClinicalTrials.gov NCT02706262.FUNDINGThis study was supported by NIH grants K01DK109119, T32HL130357, K01DK116917, R01ES027595, P42ES010337, DK56341 (Nutrition Obesity Research Center), DK20579 (Diabetes Research Center), DK052574 (Digestive Disease Research Center), and UL1TR002345 (Clinical and Translational Science Award); NIH Shared Instrumentation Grants S10RR0227552, S10OD020025, and S10OD026929; and the Foundation for Barnes-Jewish Hospital.
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Affiliation(s)
- Vincenza Cifarelli
- Center for Human Nutrition and Atkins Center of Excellence in Obesity Medicine, and
| | - Scott C Beeman
- Center for Human Nutrition and Atkins Center of Excellence in Obesity Medicine, and.,Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Gordon I Smith
- Center for Human Nutrition and Atkins Center of Excellence in Obesity Medicine, and
| | - Jun Yoshino
- Center for Human Nutrition and Atkins Center of Excellence in Obesity Medicine, and
| | - Darya Morozov
- Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Joseph W Beals
- Center for Human Nutrition and Atkins Center of Excellence in Obesity Medicine, and
| | - Brandon D Kayser
- Center for Human Nutrition and Atkins Center of Excellence in Obesity Medicine, and
| | - Jeramie D Watrous
- Departments of Medicine and Pharmacology, University of California, San Diego, La Jolla, California, USA
| | - Mohit Jain
- Departments of Medicine and Pharmacology, University of California, San Diego, La Jolla, California, USA
| | - Bruce W Patterson
- Center for Human Nutrition and Atkins Center of Excellence in Obesity Medicine, and
| | - Samuel Klein
- Center for Human Nutrition and Atkins Center of Excellence in Obesity Medicine, and
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22
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Cantow K, Evans RG, Grosenick D, Gladytz T, Niendorf T, Flemming B, Seeliger E. Quantitative Assessment of Renal Perfusion and Oxygenation by Invasive Probes: Basic Concepts. Methods Mol Biol 2021; 2216:89-107. [PMID: 33475996 PMCID: PMC9703258 DOI: 10.1007/978-1-0716-0978-1_6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
Abstract
Renal tissue hypoperfusion and hypoxia are early key elements in the pathophysiology of acute kidney injury of various origins, and may also promote progression from acute injury to chronic kidney disease. Here we describe basic principles of methodology to quantify renal hemodynamics and tissue oxygenation by means of invasive probes in experimental animals. Advantages and disadvantages of the various methods are discussed in the context of the heterogeneity of renal tissue perfusion and oxygenation.This chapter is based upon work from the COST Action PARENCHIMA, a community-driven network funded by the European Cooperation in Science and Technology (COST) program of the European Union, which aims to improve the reproducibility and standardization of renal MRI biomarkers. This introduction chapter is complemented by a separate chapter describing the experimental procedure and data analysis.
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Affiliation(s)
- Kathleen Cantow
- Working Group Integrative Kidney Physiology, Institute of Physiology, Charité-University Medicine Berlin, Berlin, Germany
| | - Roger G Evans
- Cardiovascular Disease Program, Biomedicine Discovery Institute and Department of Physiology, Monash University, Melbourne, Australia
| | - Dirk Grosenick
- Physikalisch-Technische Bundesanstalt (German Federal Metrologic Institute), Berlin, Germany
| | - Thomas Gladytz
- Physikalisch-Technische Bundesanstalt (German Federal Metrologic Institute), Berlin, Germany
| | - Thoralf Niendorf
- Berlin Ultrahigh Field Facility (B.U.F.F.), Max Delbrück Center for Molecular Medicine (MDC) in the Helmholtz Association, Berlin, Germany
| | - Bert Flemming
- Working Group Integrative Kidney Physiology, Institute of Physiology, Charité-University Medicine Berlin, Berlin, Germany
| | - Erdmann Seeliger
- Working Group Integrative Kidney Physiology, Institute of Physiology, Charité-University Medicine Berlin, Berlin, Germany.
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23
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Cheng MHY, Mo Y, Zheng G. Nano versus Molecular: Optical Imaging Approaches to Detect and Monitor Tumor Hypoxia. Adv Healthc Mater 2021; 10:e2001549. [PMID: 33241672 DOI: 10.1002/adhm.202001549] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/21/2020] [Indexed: 12/18/2022]
Abstract
Hypoxia is a ubiquitous feature of solid tumors, which plays a key role in tumor angiogenesis and resistance development. Conventional hypoxia detection methods lack continuous functional detection and are generally less suitable for dynamic hypoxia measurement. Optical sensors hereby provide a unique opportunity to noninvasively image hypoxia with high spatiotemporal resolution and enable real-time detection. Therefore, these approaches can provide a valuable tool for personalized treatment planning against this hallmark of aggressive cancers. Many small optical molecular probes can enable analyte triggered response and their photophysical properties can also be fine-tuned through structural modification. On the other hand, optical nanoprobes can acquire unique intrinsic optical properties through nanoconfinement as well as enable simultaneous multimodal imaging and drug delivery. Furthermore, nanoprobes provide biological advantages such as improving bioavailability and systemic delivery of the sensor to enhance bioavailability. This review provides a comprehensive overview of the physical, chemical, and biological analytes for cancer hypoxia detection and focuses on discussing the latest nano- and molecular developments in various optical imaging approaches (fluorescence, phosphorescence, and photoacoustic) in vivo. Finally, this review concludes with a perspective toward the potentials of these optical imaging approaches in hypoxia detection and the challenges with molecular and nanotechnology design strategies.
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Affiliation(s)
- Miffy Hok Yan Cheng
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5–354 Toronto Ontario M5G 1L7 Canada
| | - Yulin Mo
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5–354 Toronto Ontario M5G 1L7 Canada
- Institute of Medical Science University of Toronto 101 College Street Toronto Ontario M5G 1L7 Canada
| | - Gang Zheng
- Princess Margaret Cancer Centre University Health Network 101 College Street, PMCRT 5–354 Toronto Ontario M5G 1L7 Canada
- Institute of Medical Science University of Toronto 101 College Street Toronto Ontario M5G 1L7 Canada
- Department of Medical Biophysics University of Toronto 101 College Street Toronto Ontario M5G 1L7 Canada
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24
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Ashkenazi S, Cho D, Song CW. Scanning Tissue Oxygen Needle Probe. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1269:51-55. [PMID: 33966194 DOI: 10.1007/978-3-030-48238-1_8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A new device designed to scan oxygen partial pressure along a line in a biological tissue is described in this paper. The probe is housed in a stainless-steel needle. As opposed to other devices for oxygen scanning in tissue, the new probe does not require mechanical translation of the needle in the tissue. The probe includes an active sensing area along the needle shaft that can be scanned optically by an internal optical fiber. This feature allows for repeated scans of tissue oxygen along a line without translating the needle with respect to the tissue, thus avoiding tissue damage associated with needle motion. First, we describe the design of the device including its sensing mechanism, mechanical design, optical configuration, and signal processing. We then move on to describe the results of the device characterization and testing. Finally, we conclude by discussing possible applications of the device in research and in clinical diagnoses and treatment monitoring.
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Affiliation(s)
- S Ashkenazi
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN, USA.
- A-Scan LLC, Minneapolis, MN, USA.
| | - D Cho
- Department of Therapeutic Radiology-Radiation Oncology, University of Minnesota, Minneapolis, MN, USA
| | - C W Song
- Department of Therapeutic Radiology-Radiation Oncology, University of Minnesota, Minneapolis, MN, USA
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25
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Cheung A, Tu L, Manouchehri N, Kim KT, So K, Webster M, Fisk S, Tigchelaar S, Dalkilic SS, Sayre EC, Streijger F, Macnab A, Kwon BK, Shadgan B. Continuous Optical Monitoring of Spinal Cord Oxygenation and Hemodynamics during the First Seven Days Post-Injury in a Porcine Model of Acute Spinal Cord Injury. J Neurotrauma 2020; 37:2292-2301. [DOI: 10.1089/neu.2020.7086] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Affiliation(s)
- Amanda Cheung
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, British Columbia, Canada
| | - Lorna Tu
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, British Columbia, Canada
| | - Neda Manouchehri
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, British Columbia, Canada
| | - Kyoung-Tae Kim
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Neurosurgery, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, South Korea
| | - Kitty So
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, British Columbia, Canada
| | - Megan Webster
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, British Columbia, Canada
| | - Shera Fisk
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, British Columbia, Canada
| | - Seth Tigchelaar
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, British Columbia, Canada
| | - Sara S. Dalkilic
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, British Columbia, Canada
| | - Eric C. Sayre
- Arthritis Research Canada, Richmond, British Columbia, Canada
| | - Femke Streijger
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, British Columbia, Canada
| | - Andrew Macnab
- Department of Pediatrics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Brian K. Kwon
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Orthopedics, University of British Columbia, Vancouver, British Columbia, Canada
| | - Babak Shadgan
- International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Orthopedics, University of British Columbia, Vancouver, British Columbia, Canada
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26
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Scholz M, Petusseau AF, Gunn JR, Shane Chapman M, Pogue BW. Imaging of hypoxia, oxygen consumption and recovery in vivo during ALA-photodynamic therapy using delayed fluorescence of Protoporphyrin IX. Photodiagnosis Photodyn Ther 2020; 30:101790. [PMID: 32344195 DOI: 10.1016/j.pdpdt.2020.101790] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 04/19/2020] [Accepted: 04/20/2020] [Indexed: 01/17/2023]
Abstract
BACKGROUND Hypoxic lesions often respond poorly to cancer therapies. Particularly, photodynamic therapy (PDT) consumes oxygen in treated tissues, which in turn lowers its efficacy. Tools for online monitoring of intracellular pO2 are desirable. METHODS The pO2 changes were tracked during photodynamic therapy (PDT) with δ-aminolevulinic acid (ALA) in mouse skin, xenograft tumors, and human skin. ALA was applied either topically as Ameluz cream or systemically by injection. Mitochondrial pO2 was quantified by time-gated lifetime-based imaging of delayed fluorescence (DF) of protoporphyrin IX (PpIX). RESULTS pO2-weighted images were obtained with capture-times of several seconds, radiant exposures near 10 mJ/cm2, spatial resolution of 0.3 mm, and a broad dynamic range 1-50 mmHg, corresponding to DF lifetimes ≈20-2000 μs. The dose-rate effect on oxygen consumption was investigated in mouse skin. A fluence rate of 1.2 mW/cm2 did not cause any appreciable oxygen depletion, whereas 6 mW/cm2 and 12 mW/cm2 caused severe oxygen depletion after radiant exposures of only 0.4-0.8 J/cm2 and <0.2 J/cm2, respectively. Reoxygenation after PDT was studied too. With a 5 J/cm2 radiant exposure, the recovery times were 10-60 min, whereas with 2 J/cm2 they were only 1-6 min. pO2 distribution was spatially non-uniform at (sub)-millimeter scale, which underlines the necessity of tracking pO2 changes by imaging rather than point-detection. CONCLUSIONS Time-gated imaging of PpIX DF seems to be a unique tool for direct online monitoring of pO2 changes during PDT with a promising potential for research purposes as well as for comparatively easy clinical translation to improve efficacy in PDT treatment.
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Affiliation(s)
- Marek Scholz
- Center for Imaging Medicine, Thayer School of Engineering, Dartmouth College, Hanover NH 03755, USA.
| | - Arthur F Petusseau
- Center for Imaging Medicine, Thayer School of Engineering, Dartmouth College, Hanover NH 03755, USA
| | - Jason R Gunn
- Center for Imaging Medicine, Thayer School of Engineering, Dartmouth College, Hanover NH 03755, USA
| | - M Shane Chapman
- Department of Surgery, Geisel School of Medicine, Dartmouth College, Lebanon, NH 03756, USA
| | - Brian W Pogue
- Center for Imaging Medicine, Thayer School of Engineering, Dartmouth College, Hanover NH 03755, USA.
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27
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Cheung A, Streijger F, So K, Okon EB, Manouchehri N, Shortt K, Kim KT, Keung MSM, Chan RM, Fong A, Sun J, Griesdale DE, Sehkon MS, Kwon BK. Relationship between Early Vasopressor Administration and Spinal Cord Hemorrhage in a Porcine Model of Acute Traumatic Spinal Cord Injury. J Neurotrauma 2020; 37:1696-1707. [PMID: 32233727 DOI: 10.1089/neu.2019.6781] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Current practice guidelines for acute spinal cord injury (SCI) recommend augmenting mean arterial blood pressure (MAP) for the first 7 days post-injury. After SCI, the cord may be compressed by the bone/ligaments of the spinal column, limiting regional spinal cord blood flow. Following surgical decompression, blood flow may be restored, and can potentially promote a "reperfusion" injury. The effects of MAP augmentation on the injured cord during the compressed and decompressed conditions have not been previously characterized. Here, we used our porcine model of SCI to examine the impact of MAP augmentation on blood flow, oxygenation, hydrostatic pressure, metabolism, and intraparenchymal (IP) hemorrhage within the compressed and then subsequently decompressed spinal cord. Yucatan mini-pigs underwent a T10 contusion injury followed by 2 h of sustained compression. MAP augmentation of ∼20 mm Hg was achieved with norepinephrine (NE). Animals received MAP augmentation either during the period of cord compression (CP), after decompression (DCP), or during both periods (CP-DCP). Probes to monitor spinal cord blood flow (SCBF), oxygenation, pressure, and metabolic responses were inserted into the cord parenchyma adjacent to the injury site to measure these responses. The cord was harvested for histological evaluation. MAP augmentation increased SCBF and oxygenation in all groups. In the CP-DCP group, spinal cord pressure steadily increased and histological analysis showed significantly increased hemorrhage in the spinal cord at and near the injury site. MAP augmentation with vasopressors may improve blood flow and reduce ischemia in the injured cord but may also induce undesirable increases in IP pressure and hemorrhage.
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Affiliation(s)
- Amanda Cheung
- International Collaboration on Repair Discoveries, Department of Orthopedics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Femke Streijger
- International Collaboration on Repair Discoveries, Department of Orthopedics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Kitty So
- International Collaboration on Repair Discoveries, Department of Orthopedics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Elena B Okon
- International Collaboration on Repair Discoveries, Department of Orthopedics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Neda Manouchehri
- International Collaboration on Repair Discoveries, Department of Orthopedics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Katelyn Shortt
- International Collaboration on Repair Discoveries, Department of Orthopedics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Kyoung-Tae Kim
- International Collaboration on Repair Discoveries, Department of Orthopedics, The University of British Columbia, Vancouver, British Columbia, Canada.,Department of Neurosurgery, Kyungpook National University Hospital, Kyungpook National University, Daegu, South Korea
| | - Martin Sheung Man Keung
- International Collaboration on Repair Discoveries, Department of Orthopedics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Ryan M Chan
- International Collaboration on Repair Discoveries, Department of Orthopedics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Allan Fong
- International Collaboration on Repair Discoveries, Department of Orthopedics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Jenny Sun
- International Collaboration on Repair Discoveries, Department of Orthopedics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Donald E Griesdale
- Department of Anesthesiology, Division of Critical Care Medicine, Vancouver General Hospital, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Mypinder S Sehkon
- Department of Medicine, Division of Critical Care Medicine, Vancouver General Hospital, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Brian K Kwon
- International Collaboration on Repair Discoveries, Department of Orthopedics, The University of British Columbia, Vancouver, British Columbia, Canada.,Vancouver Spine Surgery Institute, Department of Orthopedics, The University of British Columbia, Vancouver, British Columbia, Canada
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28
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Mapelli P, Picchio M. 18F-FAZA PET imaging in tumor hypoxia: A focus on high-grade glioma. Int J Biol Markers 2020; 35:42-46. [DOI: 10.1177/1724600820905715] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The presence of hypoxia is a typical feature of solid tumors and has been identified in many neoplasms, favouring the survival of malignant cells in a hostile environment and the expression of an aggressive phenotype. Malignant brain tumors have large proportions of hypoxic tissue, thus contributing to resistance to radiation and chemotherapy. Positron emission tomography (PET) is an attractive technique to gain a non-invasive assessment of tumor hypoxia within the whole tumor, with 18F-fluoromisonidazole (18F-FMISO) and 18F-flouroazomycin arabinoside (18F-FAZA) being the most promising radiotracers. In this short review, we aim to discuss the available clinical studies focused on the use of 18F-FAZA PET/computed tomography in patients affected by high-grade glioma.
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Affiliation(s)
- Paola Mapelli
- Vita-Salute San Raffaele University, Milan, Italy
- Nuclear Medicine Department, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Maria Picchio
- Vita-Salute San Raffaele University, Milan, Italy
- Nuclear Medicine Department, IRCCS San Raffaele Scientific Institute, Milan, Italy
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29
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Agarwal S, Gulaka PK, Rastogi U, Kodibagkar VD. More bullets for PISTOL: linear and cyclic siloxane reporter probes for quantitative 1H MR oximetry. Sci Rep 2020; 10:1399. [PMID: 31996701 PMCID: PMC6989524 DOI: 10.1038/s41598-020-57889-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 12/18/2019] [Indexed: 12/12/2022] Open
Abstract
Tissue oximetry can assist in diagnosis and prognosis of many diseases and enable personalized therapy. Previously, we reported the ability of hexamethyldisiloxane (HMDSO) for accurate measurements of tissue oxygen tension (pO2) using Proton Imaging of Siloxanes to map Tissue Oxygenation Levels (PISTOL) magnetic resonance imaging. Here we report the feasibility of several commercially available linear and cyclic siloxanes (molecular weight 162–410 g/mol) as PISTOL-based oxygen reporters by characterizing their calibration constants. Further, field and temperature dependence of pO2 calibration curves of HMDSO, octamethyltrisiloxane (OMTSO) and polydimethylsiloxane (PDMSO) were also studied. The spin-lattice relaxation rate R1 of all siloxanes studied here exhibited a linear relationship with oxygenation (R1 = A′ + B′*pO2) at all temperatures and field strengths evaluated here. The sensitivity index η( = B′/A′) decreased with increasing molecular weight with values ranged from 4.7 × 10−3–11.6 × 10−3 torr−1 at 4.7 T. No substantial change in the anoxic relaxation rate and a slight decrease in pO2 sensitivity was observed at higher magnetic fields of 7 T and 9.4 T for HMDSO and OMTSO. Temperature dependence of calibration curves for HMDSO, OMTSO and PDMSO was small and simulated errors in pO2 measurement were 1–2 torr/°C. In summary, we have demonstrated the feasibility of various linear and cyclic siloxanes as pO2-reporters for PISTOL-based oximetry.
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Affiliation(s)
- Shubhangi Agarwal
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, 85295, USA
| | - Praveen K Gulaka
- Department of Radiology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, 75390, USA
| | - Ujjawal Rastogi
- Department of Radiology, University of Texas Southwestern Medical Center at Dallas, Dallas, TX, 75390, USA
| | - Vikram D Kodibagkar
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, 85295, USA.
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30
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Fru LC, Jacques SL, Nickel KP, Varghese T, Kissick MW, DeWerd LA, Kimple RJ. Interstitial diffuse optical probe with spectral fitting to measure dynamic tumor hypoxia. Biomed Phys Eng Express 2020; 6:10.1088/2057-1976/ab6e16. [PMID: 32095273 PMCID: PMC7039661 DOI: 10.1088/2057-1976/ab6e16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Understanding the dynamic nature of tumor hypoxia is vital for cancer therapy. The presence of oxygen within a tumor during radiation therapy increases the likelihood of local control. We used a novel interstitial diffuse optical probe to make real-time measurements of blood volume fraction and hemoglobin oxygen saturation within a tumor at a high temporal resolution. This device was initially characterized and benchmarked using a customized vessel designed to control hemoglobin oxygen saturation and blood volume in a solution of blood with different concentrations of an oxygen scavenger, tetrakis (hydroxymethyl) phosphonium chloride. The optical device was found to consistently monitor the changes in oxygen saturation and these changes correlated to the concentration of the oxygen scavenger added. In near-simultaneous measurements of blood volume and oxygen saturation in tumor-bearing mice, the changes in blood volume fraction and oxygen saturation measured with the interstitial diffuse optical probe were benchmarked against photoacoustic imaging system to track and compare temporal dynamics of oxygen saturation and blood volume in a patient-derived xenograft model of hypopharyngeal carcinoma. Positive correlations between our device and photoacoustic imaging in measuring blood volume and oxygen saturation were observed.
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Affiliation(s)
- Leonard Che Fru
- Department of Medical Physics, University of Wisconsin - Madison, Madison WI USA
| | - Steven L Jacques
- Department of Biomedical Engineering, Tufts School of Engineering, Medford MA USA
| | - Kwang P Nickel
- Department of Human Oncology, University of Wisconsin - Madison, Madison WI USA
- University of Wisconsin Carbone Cancer Center, Madison WI USA
| | - Tomy Varghese
- Department of Medical Physics, University of Wisconsin - Madison, Madison WI USA
- Department of Biomedical Engineering, University of Wisconsin - Madison, Madison WI USA
| | - Michael W Kissick
- Department of Medical Physics, University of Wisconsin - Madison, Madison WI USA
| | - Larry A DeWerd
- Department of Medical Physics, University of Wisconsin - Madison, Madison WI USA
- Radiation Calibration Laboratory, University of Wisconsin - Madison, Madison WI USA
| | - Randall J Kimple
- Department of Human Oncology, University of Wisconsin - Madison, Madison WI USA
- University of Wisconsin Carbone Cancer Center, Madison WI USA
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Godet I, Shin YJ, Ju JA, Ye IC, Wang G, Gilkes DM. Fate-mapping post-hypoxic tumor cells reveals a ROS-resistant phenotype that promotes metastasis. Nat Commun 2019; 10:4862. [PMID: 31649238 PMCID: PMC6813355 DOI: 10.1038/s41467-019-12412-1] [Citation(s) in RCA: 125] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 09/06/2019] [Indexed: 12/30/2022] Open
Abstract
Hypoxia is known to be detrimental in cancer and contributes to its development. In this work, we present an approach to fate-map hypoxic cells in vivo in order to determine their cellular response to physiological O2 gradients as well as to quantify their contribution to metastatic spread. We demonstrate the ability of the system to fate-map hypoxic cells in 2D, and in 3D spheroids and organoids. We identify distinct gene expression patterns in cells that experienced intratumoral hypoxia in vivo compared to cells exposed to hypoxia in vitro. The intratumoral hypoxia gene-signature is a better prognostic indicator for distant metastasis-free survival. Post-hypoxic tumor cells have an ROS-resistant phenotype that provides a survival advantage in the bloodstream and promotes their ability to establish overt metastasis. Post-hypoxic cells retain an increase in the expression of a subset of hypoxia-inducible genes at the metastatic site, suggesting the possibility of a 'hypoxic memory.'
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Affiliation(s)
- Inês Godet
- Department of Oncology, The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, 21231, USA
- Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Yu Jung Shin
- Department of Oncology, The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, 21231, USA
| | - Julia A Ju
- Department of Oncology, The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, 21231, USA
- Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, MD, 21218, USA
| | - I Chae Ye
- Department of Oncology, The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, 21231, USA
| | - Guannan Wang
- Department of Oncology, The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, 21231, USA
| | - Daniele M Gilkes
- Department of Oncology, The Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine, Baltimore, MD, 21231, USA.
- Department of Chemical and Biomolecular Engineering, The Johns Hopkins University, Baltimore, MD, 21218, USA.
- Cellular and Molecular Medicine Program, The Johns Hopkins University School of Medicine, Baltimore, MD, 21231, USA.
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Apnea Associated with Brainstem Seizures in Cacna1a S218L Mice Is Caused by Medullary Spreading Depolarization. J Neurosci 2019; 39:9633-9644. [PMID: 31628185 DOI: 10.1523/jneurosci.1713-19.2019] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 09/17/2019] [Accepted: 10/10/2019] [Indexed: 01/08/2023] Open
Abstract
Seizure-related apnea is common and can be lethal. Its mechanisms however remain unclear and preventive strategies are lacking. We postulate that brainstem spreading depolarization (SD), previously associated with lethal seizures in animal models, initiates apnea upon invasion of brainstem respiratory centers. To study this, we assessed effects of brainstem seizures on brainstem function and respiration in male and female mice carrying a homozygous S218L missense mutation that leads to gain-of-function of voltage-gated CaV2.1 Ca2+ channels and high risk for fatal seizures. Recordings of brainstem DC potential and neuronal activity, cardiorespiratory activity and local tissue oxygen were performed in freely behaving animals. Brainstem SD occurred during all spontaneous fatal seizures and, unexpectedly, during a subset of nonfatal seizures. Seizure-related SDs in the ventrolateral medulla correlated with respiratory suppression. Seizures induced by stimulation of the inferior colliculus could evoke SD that spread in a rostrocaudal direction, preceding local tissue hypoxia and apnea, indicating that invasion of SD into medullary respiratory centers initiated apnea and hypoxia rather than vice versa Fatal outcome was prevented by timely resuscitation. Moreover, NMDA receptor antagonists MK-801 and memantine prevented seizure-related SD and apnea, which supports brainstem SD as a prerequisite for brainstem seizure-related apnea in this animal model and has translational value for developing strategies that prevent fatal ictal apnea.SIGNIFICANCE STATEMENT Apnea during and following seizures is common, but also likely implicated in sudden unexpected death in epilepsy (SUDEP). This underlines the need to understand mechanisms for potentially lethal seizure-related apnea. In the present work we show, in freely behaving SUDEP-prone transgenic mice, that apnea is induced when spontaneous brainstem seizure-related spreading depolarization (SD) reaches respiratory nuclei in the ventrolateral medulla. We show that brainstem seizure-related medullary SD is followed by local hypoxia and recovers during nonfatal seizures, but not during fatal events. NMDA receptor antagonists prevented medullary SD and apnea, which may be of translational value.
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Li C, Huang Z, Gao N, Zheng J, Guan J. Injectable, thermosensitive, fast gelation, bioeliminable, and oxygen sensitive hydrogels. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:1191-1198. [PMID: 30889653 PMCID: PMC7368179 DOI: 10.1016/j.msec.2019.02.075] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 02/06/2019] [Accepted: 02/20/2019] [Indexed: 01/09/2023]
Abstract
The decrease of tissue oxygen content due to pathological conditions leads to severe cell death and tissue damage. Restoration of tissue oxygen content is the primary treatment goal. To accurately and efficiently assess efficacy of a treatment, minimally invasive, and long-term detection of oxygen concentration in the same tissue location represents a clinically attractive strategy. Among the different oxygen concentration measurement approaches, electron paramagnetic resonance (EPR) has the potential to accomplish this. Yet there lacks injectable EPR probes that can maintain a consistent concentration at the same tissue location during treatment period to acquire a stable EPR signal, and can finally be eliminated from body without retrieval. Herein, we developed injectable and bioeliminable hydrogel-based polymeric EPR probes that exhibited fast gelation rate, slow weight loss rate, and high oxygen sensitivity. The probe was based on N-Isopropylacrylamide (NIPAAm), 2-hydroxyethyl methacrylate (HEMA), dimethyl-γ-butyrolactone acrylate (DBA), and tetrathiatriarylmethyl (TAM) radical. The injectable probes can be implanted into tissues using a minimally invasive injection approach. The high gelation rate (~10 s) allowed the probes to quickly solidify upon injection to have a high retention in tissues. The polymeric probes overcame the toxicity issue of current small molecule EPR probes. The probes can be gradually hydrolyzed. Upon complete hydrolysis, the probes became water soluble at 37 °C, thus having the potential to be removed from the body by urinary system. The probes showed slow weight loss rate so as to maintain EPR signal intensity for extended periods while retaining in a certain tissue location. The probes remained their high oxygen sensitivity after in vitro hydrolysis and in vivo implantation for 4 weeks. These hydrogel-based EPR probes have attractive properties for in vivo oxygen detection.
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Affiliation(s)
- Chao Li
- Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - Zheng Huang
- Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - Ning Gao
- Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA; Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Jie Zheng
- Mallinckrodt Institute of Radiology, Washington University in St. Louis, St. Louis, MO 63110, USA
| | - Jianjun Guan
- Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA; Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO 63130, USA.
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Polacco MA, Hou H, Kuppusamy P, Chen EY. Measuring Flap Oxygen Using Electron Paramagnetic Resonance Oximetry. Laryngoscope 2019; 129:E415-E419. [PMID: 31034638 DOI: 10.1002/lary.28043] [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: 01/22/2019] [Revised: 04/03/2019] [Accepted: 04/15/2019] [Indexed: 12/18/2022]
Abstract
OBJECTIVES/HYPOTHESIS To determine if electron paramagnetic resonance (EPR) oximetry is a viable technology to aid in flap monitoring. STUDY DESIGN Prospective cohort. METHODS This was a cohort study assessing accuracy and speed of EPR oximetry in detecting ischemia of a saphenous artery-based flap in a rat model, using transcutaneous oximetry as a control. Measurements were obtained under both resting and ischemic conditions for nine Sprague Dawley rats (18 flaps), for 3 postoperative days following flap elevation. RESULTS The mean partial pressure of oxygen prior to tourniquet application was 66.9 ± 8.9 mm Hg with EPR oximetry and 64.7 ± 5.2 mm Hg with transcutaneous oximetry (P = .45). Mean partial pressures of oxygen during tourniquet application were 8.9 ± 3.2 mm Hg and 8.5 ± 2.9 mm Hg for EPR oximetry and transcutaneous oximetry, respectively (P = .48), and 67.2 ± 6.9 mm Hg and 65.3 ± 6.1 mm Hg after tourniquet release for EPR oximetry and transcutaneous oximetry, respectively (P = .44). The mean ischemia detection time of EPR oximetry was 49 ± 21 seconds. CONCLUSIONS Offering timely, accurate, and noninvasive tissue oxygen measurements, EPR oximetry is a promising adjunct in flap monitoring. LEVEL OF EVIDENCE NA Laryngoscope, 129:E415-E419, 2019.
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Affiliation(s)
- Marc A Polacco
- Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire
| | - Huagang Hou
- Brigham and Women's Hospital, Boston, Massachusetts
| | | | - Eunice Y Chen
- Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire
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Bodo S, Campagne C, Thin TH, Higginson DS, Vargas HA, Hua G, Fuller JD, Ackerstaff E, Russell J, Zhang Z, Klingler S, Cho H, Kaag MG, Mazaheri Y, Rimner A, Manova-Todorova K, Epel B, Zatcky J, Cleary CR, Rao SS, Yamada Y, Zelefsky MJ, Halpern HJ, Koutcher JA, Cordon-Cardo C, Greco C, Haimovitz-Friedman A, Sala E, Powell SN, Kolesnick R, Fuks Z. Single-dose radiotherapy disables tumor cell homologous recombination via ischemia/reperfusion injury. J Clin Invest 2019; 129:786-801. [PMID: 30480549 PMCID: PMC6355243 DOI: 10.1172/jci97631] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 11/20/2018] [Indexed: 12/20/2022] Open
Abstract
Tumor cure with conventional fractionated radiotherapy is 65%, dependent on tumor cell-autonomous gradual buildup of DNA double-strand break (DSB) misrepair. Here we report that single-dose radiotherapy (SDRT), a disruptive technique that ablates more than 90% of human cancers, operates a distinct dual-target mechanism, linking acid sphingomyelinase-mediated (ASMase-mediated) microvascular perfusion defects to DNA unrepair in tumor cells to confer tumor cell lethality. ASMase-mediated microcirculatory vasoconstriction after SDRT conferred an ischemic stress response within parenchymal tumor cells, with ROS triggering the evolutionarily conserved SUMO stress response, specifically depleting chromatin-associated free SUMO3. Whereas SUMO3, but not SUMO2, was indispensable for homology-directed repair (HDR) of DSBs, HDR loss of function after SDRT yielded DSB unrepair, chromosomal aberrations, and tumor clonogen demise. Vasoconstriction blockade with the endothelin-1 inhibitor BQ-123, or ROS scavenging after SDRT using peroxiredoxin-6 overexpression or the SOD mimetic tempol, prevented chromatin SUMO3 depletion, HDR loss of function, and SDRT tumor ablation. We also provide evidence of mouse-to-human translation of this biology in a randomized clinical trial, showing that 24 Gy SDRT, but not 3×9 Gy fractionation, coupled early tumor ischemia/reperfusion to human cancer ablation. The SDRT biology provides opportunities for mechanism-based selective tumor radiosensitization via accessing of SDRT/ASMase signaling, as current studies indicate that this pathway is tractable to pharmacologic intervention.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Katia Manova-Todorova
- Laboratory of Molecular Cytology, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Boris Epel
- Department of Radiation and Cellular Oncology, Center for EPR Imaging In Vivo Physiology, The University of Chicago, Chicago, Illinois, USA
| | | | | | | | | | | | - Howard J. Halpern
- Department of Radiation and Cellular Oncology, Center for EPR Imaging In Vivo Physiology, The University of Chicago, Chicago, Illinois, USA
| | | | - Carlos Cordon-Cardo
- Department of Pathology, Mount Sinai School of Medicine, New York, New York, USA
| | | | | | | | | | | | - Zvi Fuks
- Department of Radiation Oncology
- Champalimaud Centre, Lisbon, Portugal
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Nobre AR, Entenberg D, Wang Y, Condeelis J, Aguirre-Ghiso JA. The Different Routes to Metastasis via Hypoxia-Regulated Programs. Trends Cell Biol 2018; 28:941-956. [PMID: 30041830 PMCID: PMC6214449 DOI: 10.1016/j.tcb.2018.06.008] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 06/28/2018] [Accepted: 06/29/2018] [Indexed: 12/18/2022]
Abstract
Hypoxia is linked to metastasis; however, how it affects metastatic progression is not clear due to limited consensus in the literature. We posit that this lack of consensus is due to hypoxia being studied using different approaches, such as in vitro, primary tumor, or metastasis assays in an isolated manner. Here, we review the pros and cons of in vitro hypoxia assays, highlight in vivo studies that inform on physiological hypoxia, and review the evidence that primary tumor hypoxia might influence the fate of disseminated tumor cells (DTCs) in secondary organs. Our analysis suggests that consensus can be reached by using in vivo methods of study, which also allow better modeling of how hypoxia affects DTC fate and metastasis.
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Affiliation(s)
- Ana Rita Nobre
- Division of Hematology and Oncology, Department of Medicine, Department of Otolaryngology, Department of Oncological Sciences, Tisch Cancer Institute, Black Family Stem Cell Institute, Mount Sinai School of Medicine, New York, NY 10029, USA; Abel Salazar School of Biomedicine, Porto University, Porto, Portugal; These authors contributed equally
| | - David Entenberg
- Department of Anatomy and Structural Biology, Gruss Lipper Biophotonics Center, Integrated Imaging Program, Albert Einstein College of Medicine, 1300 Morris Park Ave, Bronx, NY 10461, USA; These authors contributed equally
| | - Yarong Wang
- Department of Anatomy and Structural Biology, Gruss Lipper Biophotonics Center, Integrated Imaging Program, Albert Einstein College of Medicine, 1300 Morris Park Ave, Bronx, NY 10461, USA
| | - John Condeelis
- Department of Anatomy and Structural Biology, Gruss Lipper Biophotonics Center, Integrated Imaging Program, Albert Einstein College of Medicine, 1300 Morris Park Ave, Bronx, NY 10461, USA.
| | - Julio A Aguirre-Ghiso
- Division of Hematology and Oncology, Department of Medicine, Department of Otolaryngology, Department of Oncological Sciences, Tisch Cancer Institute, Black Family Stem Cell Institute, Mount Sinai School of Medicine, New York, NY 10029, USA.
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Bonnitcha P, Grieve S, Figtree G. Clinical imaging of hypoxia: Current status and future directions. Free Radic Biol Med 2018; 126:296-312. [PMID: 30130569 DOI: 10.1016/j.freeradbiomed.2018.08.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 07/30/2018] [Accepted: 08/14/2018] [Indexed: 12/20/2022]
Abstract
Tissue hypoxia is a key feature of many important causes of morbidity and mortality. In pathologies such as stroke, peripheral vascular disease and ischaemic heart disease, hypoxia is largely a consequence of low blood flow induced ischaemia, hence perfusion imaging is often used as a surrogate for hypoxia to guide clinical diagnosis and treatment. Importantly, ischaemia and hypoxia are not synonymous conditions as it is not universally true that well perfused tissues are normoxic or that poorly perfused tissues are hypoxic. In pathologies such as cancer, for instance, perfusion imaging and oxygen concentration are less well correlated, and oxygen concentration is independently correlated to radiotherapy response and overall treatment outcomes. In addition, the progression of many diseases is intricately related to maladaptive responses to the hypoxia itself. Thus there is potentially great clinical and scientific utility in direct measurements of tissue oxygenation. Despite this, imaging assessment of hypoxia in patients is rarely performed in clinical settings. This review summarises some of the current methods used to clinically evaluate hypoxia, the barriers to the routine use of these methods and the newer agents and techniques being explored for the assessment of hypoxia in pathological processes.
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Affiliation(s)
- Paul Bonnitcha
- Northern and Central Clinical Schools, Faculty of Medicine, Sydney University, Sydney, NSW 2006, Australia; Chemical Pathology Department, NSW Health Pathology, Royal Prince Alfred Hospital, Camperdown, NSW 2050, Australia; Kolling Institute of Medical Research, University of Sydney, St Leonards, New South Wales 2065, Australia.
| | - Stuart Grieve
- Sydney Translational Imaging Laboratory, Heart Research Institute, Charles Perkins Centre and Sydney Medical School, University of Sydney, NSW 2050, Australia
| | - Gemma Figtree
- Kolling Institute of Medical Research, University of Sydney, St Leonards, New South Wales 2065, Australia; Cardiology Department, Royal North Shore Hospital, St Leonards, New South Wales 2065, Australia
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Desmet CM, Tran LBA, Danhier P, Gallez B. Characterization of a clinically used charcoal suspension for in vivo EPR oximetry. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2018; 32:205-212. [DOI: 10.1007/s10334-018-0704-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 08/21/2018] [Accepted: 08/31/2018] [Indexed: 12/18/2022]
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Nezakati T, Seifalian A, Tan A, Seifalian AM. Conductive Polymers: Opportunities and Challenges in Biomedical Applications. Chem Rev 2018; 118:6766-6843. [DOI: 10.1021/acs.chemrev.6b00275] [Citation(s) in RCA: 354] [Impact Index Per Article: 59.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Toktam Nezakati
- Google Inc.., Mountain View, California 94043, United States
- Centre for Nanotechnology and Regenerative Medicine, Division of Surgery and Interventional Science, University College London, London NW3 2QG, United Kingdom
| | - Amelia Seifalian
- UCL Medical School, University College London, London WC1E 6BT, United Kingdom
| | - Aaron Tan
- UCL Medical School, University College London, London WC1E 6BT, United Kingdom
| | - Alexander M. Seifalian
- NanoRegMed Ltd. (Nanotechnology and Regenerative Medicine Commercialization Centre), The London Innovation BioScience Centre, London NW1 0NH, United Kingdom
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Eisenbrey JR, Shraim R, Liu JB, Li J, Stanczak M, Oeffinger B, Leeper DB, Keith SW, Jablonowski LJ, Forsberg F, O'Kane P, Wheatley MA. Sensitization of Hypoxic Tumors to Radiation Therapy Using Ultrasound-Sensitive Oxygen Microbubbles. Int J Radiat Oncol Biol Phys 2018; 101:88-96. [PMID: 29477294 PMCID: PMC5886808 DOI: 10.1016/j.ijrobp.2018.01.042] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 12/05/2017] [Accepted: 01/10/2018] [Indexed: 10/18/2022]
Abstract
PURPOSE Much of the volume of solid tumors typically exists in a chronically hypoxic microenvironment that has been shown to result in both chemotherapy and radiation therapy resistance. The purpose of this study was to use localized microbubble delivery to overcome hypoxia prior to therapy. MATERIALS AND METHODS In this study, surfactant-shelled oxygen microbubbles were fabricated and injected intravenously to locally elevate tumor oxygen levels when triggered by noninvasive ultrasound in mice with human breast cancer tumors. Changes in oxygen and sensitivity to radiation therapy were then measured. RESULTS In this work, we show that oxygen-filled microbubbles successfully and consistently increase breast tumor oxygenation levels in a murine model by 20 mmHg, significantly more than control injections of saline solution or untriggered oxygen microbubbles (P < .001). Using photoacoustic imaging, we also show that oxygen delivery is independent of hemoglobin transport, enabling oxygen delivery to avascular regions of the tumor. Finally, we show that overcoming hypoxia by this method immediately prior to radiation therapy nearly triples radiosensitivity. This improvement in radiosensitivity results in roughly 30 days of improved tumor control, providing statistically significant improvements in tumor growth and animal survival (P < .03). CONCLUSIONS Our findings demonstrate the potential advantages of ultrasound-triggered oxygen delivery to solid tumors and warrant future efforts into clinical translation of the microbubble platform.
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Affiliation(s)
- John R Eisenbrey
- Department of Radiology, Thomas Jefferson University, Philadelphia, Pennsylvania.
| | - Rawan Shraim
- School of Biomedical Engineering and Health Sciences, Drexel University, Philadelphia, Pennsylvania
| | - Ji-Bin Liu
- Department of Radiology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Jingzhi Li
- Department of Radiology, Thomas Jefferson University, Philadelphia, Pennsylvania; Department of Vascular Ultrasonography, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Maria Stanczak
- Department of Radiology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Brian Oeffinger
- School of Biomedical Engineering and Health Sciences, Drexel University, Philadelphia, Pennsylvania
| | - Dennis B Leeper
- Department of Radiation Oncology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Scott W Keith
- Division of Biostatistics, Department of Pharmacology and Experimental Therapeutics, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Lauren J Jablonowski
- Department of Radiology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Flemming Forsberg
- Department of Radiology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Patrick O'Kane
- Department of Radiology, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Margaret A Wheatley
- School of Biomedical Engineering and Health Sciences, Drexel University, Philadelphia, Pennsylvania
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Mirabello V, Cortezon-Tamarit F, Pascu SI. Oxygen Sensing, Hypoxia Tracing and in Vivo Imaging with Functional Metalloprobes for the Early Detection of Non-communicable Diseases. Front Chem 2018; 6:27. [PMID: 29527524 PMCID: PMC5829448 DOI: 10.3389/fchem.2018.00027] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 02/02/2018] [Indexed: 01/10/2023] Open
Abstract
Hypoxia has been identified as one of the hallmarks of tumor environments and a prognosis factor in many cancers. The development of ideal chemical probes for imaging and sensing of hypoxia remains elusive. Crucial characteristics would include a measurable response to subtle variations of pO2 in living systems and an ability to accumulate only in the areas of interest (e.g., targeting hypoxia tissues) whilst exhibiting kinetic stabilities in vitro and in vivo. A sensitive probe would comprise platforms for applications in imaging and therapy for non-communicable diseases (NCDs) relying on sensitive detection of pO2. Just a handful of probes for the in vivo imaging of hypoxia [mainly using positron emission tomography (PET)] have reached the clinical research stage. Many chemical compounds, whilst presenting promising in vitro results as oxygen-sensing probes, are facing considerable disadvantages regarding their general application in vivo. The mechanisms of action of many hypoxia tracers have not been entirely rationalized, especially in the case of metallo-probes. An insight into the hypoxia selectivity mechanisms can allow an optimization of current imaging probes candidates and this will be explored hereby. The mechanistic understanding of the modes of action of coordination compounds under oxygen concentration gradients in living cells allows an expansion of the scope of compounds toward in vivo applications which, in turn, would help translate these into clinical applications. We summarize hereby some of the recent research efforts made toward the discovery of new oxygen sensing molecules having a metal-ligand core. We discuss their applications in vitro and/or in vivo, with an appreciation of a plethora of molecular imaging techniques (mainly reliant on nuclear medicine techniques) currently applied in the detection and tracing of hypoxia in the preclinical and clinical setups. The design of imaging/sensing probe for early-stage diagnosis would longer term avoid invasive procedures providing platforms for therapy monitoring in a variety of NCDs and, particularly, in cancers.
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Lankadeva YR, Kosaka J, Evans RG, May CN. An Ovine Model for Studying the Pathophysiology of Septic Acute Kidney Injury. Methods Mol Biol 2018; 1717:207-218. [PMID: 29468594 DOI: 10.1007/978-1-4939-7526-6_16] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The development of acute kidney injury (AKI) is both a significant and independent prognostic factor of mortality in patients with sepsis, but its pathophysiology remains unclear. Herein, we describe an ovine model of sepsis evoked by the administration of live Escherichia coli in which there is hypotension, peripheral vasodilatation with a large increase in cardiac output; a similar hyperdynamic state to that commonly reported in humans. Interestingly, in this sheep model of sepsis, despite an increase in global kidney blood flow, there is a progressive reduction in renal function. Although renal hyperperfusion develops, renal tissue hypoxia due to redistribution of intrarenal blood flow may contribute to the pathogenesis of septic AKI. We have, therefore, developed a novel methodology to chronically implant combination probes to monitor intrarenal tissue perfusion and oxygen tension during the development of septic AKI in conscious sheep with hyperdynamic sepsis.
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Affiliation(s)
- Yugeesh R Lankadeva
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia.
| | - Junko Kosaka
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Roger G Evans
- Department of Physiology, Monash University, Parkville, VIC, Australia
| | - Clive N May
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
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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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Valable S, Corroyer-Dulmont A, Chakhoyan A, Durand L, Toutain J, Divoux D, Barré L, MacKenzie ET, Petit E, Bernaudin M, Touzani O, Barbier EL. Imaging of brain oxygenation with magnetic resonance imaging: A validation with positron emission tomography in the healthy and tumoural brain. J Cereb Blood Flow Metab 2017; 37:2584-2597. [PMID: 27702880 PMCID: PMC5531354 DOI: 10.1177/0271678x16671965] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The partial pressure in oxygen remains challenging to map in the brain. Two main strategies exist to obtain surrogate measures of tissue oxygenation: the tissue saturation studied by magnetic resonance imaging (StO2-MRI) and the identification of hypoxia by a positron emission tomography (PET) biomarker with 3-[18F]fluoro-1-(2-nitro-1-imidazolyl)-2-propanol ([18F]-FMISO) as the leading radiopharmaceutical. Nonetheless, a formal validation of StO2-MRI against FMISO-PET has not been performed. The objective of our studies was to compare the two approaches in (a) the normal rat brain when the rats were submitted to hypoxemia; (b) animals implanted with four tumour types differentiated by their oxygenation. Rats were submitted to normoxic and hypoxemic conditions. For the brain tumour experiments, U87-MG, U251-MG, 9L and C6 glioma cells were orthotopically inoculated in rats. For both experiments, StO2-MRI and [18F]-FMISO PET were performed sequentially. Under hypoxemia conditions, StO2-MRI revealed a decrease in oxygen saturation in the brain. Nonetheless, [18F]-FMISO PET, pimonidazole immunohistochemistry and molecular biology were insensitive to hypoxia. Within the context of tumours, StO2-MRI was able to detect hypoxia in the hypoxic models, mimicking [18F]-FMISO PET with high sensitivity/specificity. Altogether, our data clearly support that, in brain pathologies, StO2-MRI could be a robust and specific imaging biomarker to assess hypoxia.
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Affiliation(s)
- Samuel Valable
- 1 Normandie Université, UNICAEN, CEA, CNRS, ISTCT/CERVOxy Group, Caen, France
| | | | - Ararat Chakhoyan
- 1 Normandie Université, UNICAEN, CEA, CNRS, ISTCT/CERVOxy Group, Caen, France
| | - Lucile Durand
- 1 Normandie Université, UNICAEN, CEA, CNRS, ISTCT/CERVOxy Group, Caen, France
| | - Jérôme Toutain
- 1 Normandie Université, UNICAEN, CEA, CNRS, ISTCT/CERVOxy Group, Caen, France
| | - Didier Divoux
- 1 Normandie Université, UNICAEN, CEA, CNRS, ISTCT/CERVOxy Group, Caen, France
| | - Louisa Barré
- 2 Normandie Université, UNICAEN, CEA, CNRS, ISTCT/LDM-TEP Group, Caen, France
| | - Eric T MacKenzie
- 1 Normandie Université, UNICAEN, CEA, CNRS, ISTCT/CERVOxy Group, Caen, France
| | - Edwige Petit
- 1 Normandie Université, UNICAEN, CEA, CNRS, ISTCT/CERVOxy Group, Caen, France
| | - Myriam Bernaudin
- 1 Normandie Université, UNICAEN, CEA, CNRS, ISTCT/CERVOxy Group, Caen, France
| | - Omar Touzani
- 1 Normandie Université, UNICAEN, CEA, CNRS, ISTCT/CERVOxy Group, Caen, France
| | - Emmanuel L Barbier
- 3 Inserm, U1216, Grenoble, France.,4 Université Grenoble Alpes, Grenoble Institut des Neurosciences, Grenoble, France
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Grimes DR, Warren DR, Warren S. Hypoxia imaging and radiotherapy: bridging the resolution gap. Br J Radiol 2017; 90:20160939. [PMID: 28540739 PMCID: PMC5603947 DOI: 10.1259/bjr.20160939] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Oxygen distribution is a major determinant of treatment success in radiotherapy, with well-oxygenated tumour regions responding by up to a factor of three relative to anoxic volumes. Conversely, tumour hypoxia is associated with treatment resistance and negative prognosis. Tumour oxygenation is highly heterogeneous and difficult to measure directly. The recent advent of functional hypoxia imaging modalities such as fluorine-18 fluoromisonidazole positron emission tomography have shown promise in non-invasively determining regions of low oxygen tension. This raises the prospect of selectively increasing dose to hypoxic subvolumes, a concept known as dose painting. Yet while this is a promising approach, oxygen-mediated radioresistance is inherently a multiscale problem, and there are still a number of substantial challenges that must be overcome if hypoxia dose painting is to be successfully implemented. Current imaging modalities are limited by the physics of such systems to have resolutions in the millimetre regime, whereas oxygen distribution varies over a micron scale, and treatment delivery is typically modulated on a centimetre scale. In this review, we examine the mechanistic basis and implications of the radiobiological oxygen effect, the factors influencing microscopic heterogeneity in tumour oxygenation and the consequent challenges in the interpretation of clinical hypoxia imaging (in particular fluorine-18 fluoromisonidazole positron emission tomography). We also discuss dose-painting approaches and outline challenges that must be addressed to improve this treatment paradigm.
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Affiliation(s)
- David Robert Grimes
- 1 Cancer Research UK/MRC Oxford Institute for Radiation Oncology, Gray Laboratory, University of Oxford, Old Road Campus Research Building, Off Roosevelt Drive, Oxford OX37DQ, UK.,2 Centre for Advanced and Interdisciplinary Radiation Research (CAIRR), School of Mathematics and Physics, Queen's University Belfast, UK
| | - Daniel R Warren
- 1 Cancer Research UK/MRC Oxford Institute for Radiation Oncology, Gray Laboratory, University of Oxford, Old Road Campus Research Building, Off Roosevelt Drive, Oxford OX37DQ, UK
| | - Samantha Warren
- 1 Cancer Research UK/MRC Oxford Institute for Radiation Oncology, Gray Laboratory, University of Oxford, Old Road Campus Research Building, Off Roosevelt Drive, Oxford OX37DQ, UK.,3 Hall-Edwards Radiotherapy Research Group, Queen Elizabeth Hospital, Birmingham, UK
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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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Abstract
Molecular oxygen (O2) is essential to brain function and mechanisms necessary to regulate variations in delivery or utilization of O2 are crucial to support normal brain homeostasis, physiology and energy metabolism. Any imbalance in cerebral tissue partial pressure of O2 (pO2) levels may lead to pathophysiological complications including increased reactive O2 species generation leading to oxidative stress when tissue O2 level is too high or too low. Accordingly, the need for oximetry methods, which assess cerebral pO2in vivo and in real time, is imperative to understand the role of O2 in various metabolic and disease states, including the effects of treatment and therapy options. In this review, we provide a brief overview of the common in vivo oximetry methodologies for measuring cerebral pO2. We discuss the advantages and limitations of oximetry methodologies to measure cerebral pO2in vivo followed by a more in-depth review of electron paramagnetic resonance oximetry spectroscopy and imaging using several examples of current electron paramagnetic resonance oximetry applications in the brain.
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Affiliation(s)
- John M Weaver
- Department of Pharmaceutical Sciences, College of Pharmacy, University of New Mexico Health Sciences Center, Albuquerque, NM, USA.,Center of Biomedical Research Excellence, College of Pharmacy, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
| | - Ke Jian Liu
- Department of Pharmaceutical Sciences, College of Pharmacy, University of New Mexico Health Sciences Center, Albuquerque, NM, USA.,Center of Biomedical Research Excellence, College of Pharmacy, University of New Mexico Health Sciences Center, Albuquerque, NM, USA.,Department of Neurology, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
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Gray Matter Hypoxia in the Brain of the Experimental Autoimmune Encephalomyelitis Model of Multiple Sclerosis. PLoS One 2016; 11:e0167196. [PMID: 27907119 PMCID: PMC5131950 DOI: 10.1371/journal.pone.0167196] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 11/10/2016] [Indexed: 12/30/2022] Open
Abstract
Background Multiple sclerosis (MS) has a significant inflammatory component and may have significant gray matter (GM) pathophysiology. Brain oxygenation is a sensitive measurement of the balance between metabolic need and oxygen delivery. There is evidence that inflammation and hypoxia are interdependent. In this paper, we applied novel, implanted PO2 sensors to measure hypoxia in cortical and cerebellar GM, in an inflammation-induced mouse model of MS. Objective Quantify oxygenation in cortical and cerebellar GM in the awake, unrestrained experimental autoimmune encephalomyelitis (EAE) mouse model and to relate the results to symptom level and disease time-course. Methods C57BL/6 mice were implanted with a fiber-optic sensor in the cerebellum (n = 13) and cortex (n = 24). Animals were induced with stimulation of the immune response and sensitization to myelin oligodendrocyte glycoprotein (MOG). Controls did not have MOG. We measured PO2 in awake, unrestrained animals from pre-induction (baseline) up to 36 days post-induction for EAE and controls. Results There were more days with hypoxia than hyperoxia (cerebellum: 34/67 vs. 18/67 days; cortex: 85/112 vs. 22/112) compared to time-matched controls. The average decline in PO2 on days that were significantly lower than time-matched controls was -8.8±6.0 mmHg (mean ± SD) for the cerebellum and -8.0±4.6 for the cortex. Conversely, the average increase in PO2 on days that were significantly hyperoxic was +3.2±2.8 mmHg (mean ± SD) for the cerebellum and +0.8±2.1 for the cortex. Cortical hypoxia related to increased behavioral deficits. Evidence for hypoxia occurred before measurable behavioral deficits. Conclusions A highly inflammatory condition primed to a white matter (WM) autoimmune response correlates with significant hypoxia and increased variation in oxygenation in GM of both cerebellum and cortex in the mouse EAE model of MS.
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Abstract
EPR (electron paramagnetic resonance) based biological oximetry is a powerful tool that accurately and repeatedly measures tissue oxygen levels. In vivo determination of oxygen in tissues is crucial for the diagnosis and treatment of a number of diseases. Here, we report the first successful fabrication and remarkable properties of nanofiber sensors for EPR-oximetry applications. Lithium octa-n-butoxynaphthalocyanine (LiNc- BuO), an excellent paramagnetic oxygen sensor, was successfully encapsulated in 300-500 nm diameter fibers consisting of a core of polydimethylsiloxane (PDMS) and a shell of polycaprolactone (PCL) by electrospinning. This core-shell nanosensor (LiNc-BuO-PDMS-PCL) shows a linear dependence of linewidth versus oxygen partial pressure (pO2). The nanofiber sensors have response and recovery times of 0.35 s and 0.55 s, respectively, these response and recovery times are ~12 times and ~218 times faster than those previously reported for PDMS-LiNc-BuO chip sensors. This greater responsiveness is likely due to the high porosity and excellent oxygen permeability of the nanofibers. Electrospinning of the structurally flexible PDMS enabled the fabrication of fibers having tailored spin densities. Core-shell encapsulation ensures the non-exposure of embedded LiNc-BuO and mitigates potential biocompatibility concerns. In vitro evaluation of the fiber performed under exposure to cultured cells showed that it is both stable and biocompatible. The unique combination of biocompatibility due to the PCL 'shell,' the excellent oxygen transparency of the PDMS core, and the excellent oxygen-sensing properties of LiNc-BuO makes LiNc-BuO-PDMS-PCL platform promising for long-term oximetry and repetitive oxygen measurements in both biological systems and clinical applications.
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50
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Yu L, Wu Y, Dunn JF, Murari K. In-vivo monitoring of tissue oxygen saturation in deep brain structures using a single fiber optical system. BIOMEDICAL OPTICS EXPRESS 2016; 7:4685-4694. [PMID: 27896007 PMCID: PMC5119607 DOI: 10.1364/boe.7.004685] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 10/05/2016] [Accepted: 10/13/2016] [Indexed: 05/05/2023]
Abstract
We propose a single fiber optical system for monitoring tissue oxygen saturation (sO2) based on continuous-wave reflectance spectroscopy in the visible wavelengths. The system is designed for measurements in deep brain structures by stereotaxically implanting the 200 μm-core fiber probe into the tissue of interest. Monte Carlo (MC) simulations were used to estimate the measurement tissue volume between 0.02-0.03 mm3. Experiments in an optical phantom indicated the system had a root mean squared error (RMSE) of 4.21% compared with a commercial fluorescence-based tissue oxygen partial pressure measuring system. Finally, we used the system for continuously monitoring tissue sO2 from a highly-localized volume in anesthetized mice.
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Affiliation(s)
- Linhui Yu
- Electrical and Computer Engineering, Schulich School of Engineering, University of Calgary,
Canada
| | - Ying Wu
- Department of Radiology, Cumming School of Medicine, University of Calgary,
Canada
| | - Jeff F. Dunn
- Department of Radiology, Cumming School of Medicine, University of Calgary,
Canada
- Hotchkiss Brain Institute, University of Calgary,
Canada
- Experimental Imaging Centre, University of Calgary,
Canada
| | - Kartikeya Murari
- Electrical and Computer Engineering, Schulich School of Engineering, University of Calgary,
Canada
- Hotchkiss Brain Institute, University of Calgary,
Canada
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