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Pratt HG, Ma L, Dziadowicz SA, Ott S, Whalley T, Szomolay B, Eubank TD, Hu G, Boone BA. Analysis of single nuclear chromatin accessibility reveals unique myeloid populations in human pancreatic ductal adenocarcinoma. Clin Transl Med 2024; 14:e1595. [PMID: 38426634 PMCID: PMC10905544 DOI: 10.1002/ctm2.1595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/30/2024] [Accepted: 02/06/2024] [Indexed: 03/02/2024] Open
Abstract
BACKGROUND A better understanding of the pancreatic ductal adenocarcinoma (PDAC) immune microenvironment is critical to developing new treatments and improving outcomes. Myeloid cells are of particular importance for PDAC progression; however, the presence of heterogenous subsets with different ontogeny and impact, along with some fluidity between them, (infiltrating monocytes vs. tissue-resident macrophages; M1 vs. M2) makes characterisation of myeloid populations challenging. Recent advances in single cell sequencing technology provide tools for characterisation of immune cell infiltrates, and open chromatin provides source and function data for myeloid cells to assist in more comprehensive characterisation. Thus, we explore single nuclear assay for transposase accessible chromatin (ATAC) sequencing (snATAC-Seq), a method to analyse open gene promoters and transcription factor binding, as an important means for discerning the myeloid composition in human PDAC tumours. METHODS Frozen pancreatic tissues (benign or PDAC) were prepared for snATAC-Seq using 10× Chromium technology. Signac was used for preliminary analysis, clustering and differentially accessible chromatin region identification. The genes annotated in promoter regions were used for Gene Ontology (GO) enrichment and cell type annotation. Gene signatures were used for survival analysis with The Cancer Genome Atlas (TCGA)-pancreatic adenocarcinoma (PAAD) dataset. RESULTS Myeloid cell transcription factor activities were higher in tumour than benign pancreatic samples, enabling us to further stratify tumour myeloid populations. Subcluster analysis revealed eight distinct myeloid populations. GO enrichment demonstrated unique functions for myeloid populations, including interleukin-1b signalling (recruited monocytes) and intracellular protein transport (dendritic cells). The identified gene signature for dendritic cells influenced survival (hazard ratio = .63, p = .03) in the TCGA-PAAD dataset, which was unique to PDAC. CONCLUSIONS These data suggest snATAC-Seq as a method for analysis of frozen human pancreatic tissues to distinguish myeloid populations. An improved understanding of myeloid cell heterogeneity and function is important for developing new treatment targets in PDAC.
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Affiliation(s)
- Hillary G. Pratt
- Cancer Cell BiologyWest Virginia UniversityMorgantownWest VirginiaUSA
- WVU Cancer InstituteWest Virginia UniversityMorgantownWest VirginiaUSA
| | - Li Ma
- Department of MicrobiologyImmunology and Cell BiologyWest Virginia UniversityMorgantownWest VirginiaUSA
| | - Sebastian A. Dziadowicz
- Department of MicrobiologyImmunology and Cell BiologyWest Virginia UniversityMorgantownWest VirginiaUSA
| | - Sascha Ott
- Warwick Medical SchoolUniversity of WarwickCoventryUK
| | | | - Barbara Szomolay
- Division of Infection and Immunity & Systems Immunity Research InstituteCardiff UniversityCardiffUK
| | - Timothy D. Eubank
- Cancer Cell BiologyWest Virginia UniversityMorgantownWest VirginiaUSA
- WVU Cancer InstituteWest Virginia UniversityMorgantownWest VirginiaUSA
- Department of MicrobiologyImmunology and Cell BiologyWest Virginia UniversityMorgantownWest VirginiaUSA
- In Vivo Multifunctional Magnetic Resonance CenterWest Virginia UniversityMorgantownWest VirginiaUSA
| | - Gangqing Hu
- WVU Cancer InstituteWest Virginia UniversityMorgantownWest VirginiaUSA
- Department of MicrobiologyImmunology and Cell BiologyWest Virginia UniversityMorgantownWest VirginiaUSA
| | - Brian A. Boone
- Cancer Cell BiologyWest Virginia UniversityMorgantownWest VirginiaUSA
- WVU Cancer InstituteWest Virginia UniversityMorgantownWest VirginiaUSA
- Department of MicrobiologyImmunology and Cell BiologyWest Virginia UniversityMorgantownWest VirginiaUSA
- Department of SurgeryWest Virginia UniversityMorgantownWest VirginiaUSA
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Sudhakaran M, Navarrete TG, Mejía-Guerra K, Mukundi E, Eubank TD, Grotewold E, Arango D, Doseff AI. Transcriptome reprogramming through alternative splicing triggered by apigenin drives cell death in triple-negative breast cancer. Cell Death Dis 2023; 14:824. [PMID: 38092740 PMCID: PMC10719380 DOI: 10.1038/s41419-023-06342-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 11/19/2023] [Accepted: 11/27/2023] [Indexed: 12/17/2023]
Abstract
Triple-negative breast cancer (TNBC) is characterized by its aggressiveness and resistance to cancer-specific transcriptome alterations. Alternative splicing (AS) is a major contributor to the diversification of cancer-specific transcriptomes. The TNBC transcriptome landscape is characterized by aberrantly spliced isoforms that promote tumor growth and resistance, underscoring the need to identify approaches that reprogram AS circuitry towards transcriptomes, favoring a delay in tumorigenesis or responsiveness to therapy. We have previously shown that flavonoid apigenin is associated with splicing factors, including heterogeneous nuclear ribonucleoprotein A2 (hnRNPA2). Here, we showed that apigenin reprograms TNBC-associated AS transcriptome-wide. The AS events affected by apigenin were statistically enriched in hnRNPA2 substrates. Comparative transcriptomic analyses of human TNBC tumors and non-tumor tissues showed that apigenin can switch cancer-associated alternative spliced isoforms (ASI) to those found in non-tumor tissues. Apigenin preferentially affects the splicing of anti-apoptotic and proliferation factors, which are uniquely observed in cancer cells, but not in non-tumor cells. Apigenin switches cancer-associated aberrant ASI in vivo in TNBC xenograft mice by diminishing proliferation and increasing pro-apoptotic ASI. In accordance with these findings, apigenin increased apoptosis and reduced tumor proliferation, thereby halting TNBC growth in vivo. Our results revealed that apigenin reprograms transcriptome-wide TNBC-specific AS, thereby inducing apoptosis and hindering tumor growth. These findings underscore the impactful effects of nutraceuticals in altering cancer transcriptomes, offering new options to influence outcomes in TNBC treatments.
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Affiliation(s)
- Meenakshi Sudhakaran
- Molecular, Cellular, and Integrative Physiology Graduate Program, Michigan State University, East Lansing, MI, USA
| | - Tatiana García Navarrete
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, USA
| | | | - Eric Mukundi
- Department of Molecular Genetics, The Ohio State University, Columbus, OH, USA
| | - Timothy D Eubank
- Department of Microbiology, Immunology & Cell Biology, West Virginia University, Morgantown, WV, USA
| | - Erich Grotewold
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, USA
| | - Daniel Arango
- Department of Pharmacology and Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
| | - Andrea I Doseff
- Department of Physiology and Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI, USA.
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Mihalik NE, Steinberger KJ, Stevens AM, Bobko AA, Hoblitzell EH, Tseytlin O, Akhter H, Dziadowicz SA, Wang L, O’Connell RC, Monaghan KL, Hu G, Mo X, Khramtsov VV, Tseytlin M, Driesschaert B, Wan EC, Eubank TD. Dose-Specific Intratumoral GM-CSF Modulates Breast Tumor Oxygenation and Antitumor Immunity. J Immunol 2023; 211:1589-1604. [PMID: 37756529 PMCID: PMC10656117 DOI: 10.4049/jimmunol.2300326] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 09/11/2023] [Indexed: 09/29/2023]
Abstract
GM-CSF has been employed as an adjuvant to cancer immunotherapy with mixed results based on dosage. We previously showed that GM-CSF regulated tumor angiogenesis by stimulating soluble vascular endothelial growth factor (VEGF) receptor-1 from monocytes/macrophages in a dose-dependent manner that neutralized free VEGF, and intratumoral injections of high-dose GM-CSF ablated blood vessels and worsened hypoxia in orthotopic polyoma middle T Ag (PyMT) triple-negative breast cancer (TNBC). In this study, we assessed both immunoregulatory and oxygen-regulatory components of low-dose versus high-dose GM-CSF to compare effects on tumor oxygen, vasculature, and antitumor immunity. We performed intratumoral injections of low-dose GM-CSF or saline controls for 3 wk in FVB/N PyMT TNBC. Low-dose GM-CSF uniquely reduced tumor hypoxia and normalized tumor vasculature by increasing NG2+ pericyte coverage on CD31+ endothelial cells. Priming of "cold," anti-PD1-resistant PyMT tumors with low-dose GM-CSF (hypoxia reduced) sensitized tumors to anti-PD1, whereas high-dose GM-CSF (hypoxia exacerbated) did not. Low-dose GM-CSF reduced hypoxic and inflammatory tumor-associated macrophage (TAM) transcriptional profiles; however, no phenotypic modulation of TAMs or tumor-infiltrating lymphocytes were observed by flow cytometry. In contrast, high-dose GM-CSF priming increased infiltration of TAMs lacking the MHC class IIhi phenotype or immunostimulatory marker expression, indicating an immunosuppressive phenotype under hypoxia. However, in anti-PD1 (programmed cell death 1)-susceptible BALB/c 4T1 tumors (considered hot versus PyMT), high-dose GM-CSF increased MHC class IIhi TAMs and immunostimulatory molecules, suggesting disparate effects of high-dose GM-CSF across PyMT versus 4T1 TNBC models. Our data demonstrate a (to our knowledge) novel role for low-dose GM-CSF in reducing tumor hypoxia for synergy with anti-PD1 and highlight why dosage and setting of GM-CSF in cancer immunotherapy regimens require careful consideration.
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Affiliation(s)
- Nicole E. Mihalik
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
- WVU Cancer Institute, West Virginia University, Morgantown, WV, 26505
| | - Kayla J. Steinberger
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
- WVU Cancer Institute, West Virginia University, Morgantown, WV, 26505
| | - Alyson M. Stevens
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
- WVU Cancer Institute, West Virginia University, Morgantown, WV, 26505
| | - Andrey A. Bobko
- WVU Cancer Institute, West Virginia University, Morgantown, WV, 26505
- Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, WV 26506
- In vivo Multifunctional Magnetic Resonance (IMMR) center, West Virginia University, Morgantown, WV 26506
| | - E. Hannah Hoblitzell
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
| | - Oxana Tseytlin
- Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, WV 26506
- In vivo Multifunctional Magnetic Resonance (IMMR) center, West Virginia University, Morgantown, WV 26506
| | - Halima Akhter
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
- Bioinformatics Core, West Virginia University, Morgantown, WV 26506
- Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, WV 26506
| | - Sebastian A. Dziadowicz
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
- Bioinformatics Core, West Virginia University, Morgantown, WV 26506
| | - Lei Wang
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
- Bioinformatics Core, West Virginia University, Morgantown, WV 26506
| | - Ryan C. O’Connell
- Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, WV 26506
- In vivo Multifunctional Magnetic Resonance (IMMR) center, West Virginia University, Morgantown, WV 26506
| | - Kelly L. Monaghan
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
| | - Gangqing Hu
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
- Bioinformatics Core, West Virginia University, Morgantown, WV 26506
| | - Xiaokui Mo
- Center for Biostatistics, Department of Biomedical Informatics, The Ohio State University, 1585 Neil Ave, Columbus, OH 43210, USA
| | - Valery V. Khramtsov
- West Virginia Clinical and Translational Science Institute, West Virginia University, Morgantown WV 26506
- WVU Cancer Institute, West Virginia University, Morgantown, WV, 26505
- Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, WV 26506
- In vivo Multifunctional Magnetic Resonance (IMMR) center, West Virginia University, Morgantown, WV 26506
| | - Mark Tseytlin
- WVU Cancer Institute, West Virginia University, Morgantown, WV, 26505
- Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, WV 26506
- In vivo Multifunctional Magnetic Resonance (IMMR) center, West Virginia University, Morgantown, WV 26506
| | - Benoit Driesschaert
- Department of Pharmaceutical Sciences, West Virginia University, Morgantown, WV, 26506
- West Virginia Clinical and Translational Science Institute, West Virginia University, Morgantown WV 26506
- WVU Cancer Institute, West Virginia University, Morgantown, WV, 26505
- In vivo Multifunctional Magnetic Resonance (IMMR) center, West Virginia University, Morgantown, WV 26506
- C. Eugene Bennet Department of Chemistry, West Virginia University, Morgantown, WV, 26505, United States
| | - Edwin C.K. Wan
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
- Department of Neuroscience, West Virginia University, Morgantown, WV, 26505
| | - Timothy D. Eubank
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
- West Virginia Clinical and Translational Science Institute, West Virginia University, Morgantown WV 26506
- WVU Cancer Institute, West Virginia University, Morgantown, WV, 26505
- In vivo Multifunctional Magnetic Resonance (IMMR) center, West Virginia University, Morgantown, WV 26506
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Shaw MA, Poncelet M, Viswakarma N, Vallerini GP, Hameed S, Gluth TD, Geldenhuys WJ, Hoblitzell EH, Eubank TD, Epel B, Kotecha M, Driesschaert B. SOX71, A Biocompatible Succinyl Derivative of the Triarylmethyl Radical OX071 for In Vivo Quantitative Oxygen Mapping Using Electron Paramagnetic Resonance. Mol Imaging Biol 2023:10.1007/s11307-023-01869-8. [PMID: 37945971 DOI: 10.1007/s11307-023-01869-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 09/27/2023] [Accepted: 10/23/2023] [Indexed: 11/12/2023]
Abstract
PURPOSE This study aimed to develop a biocompatible oximetric electron paramagnetic resonance (EPR) spin probe with reduced self-relaxation, and sensitivity to oxygen for a higher signal-to-noise ratio and longer relaxation times at high oxygen concentration, compared to the reference spin probe OX071. PROCEDURES SOX71 was synthesized by succinylation of the twelve alcohol groups of OX071 spin probe and characterized by EPR at X-Band (9.5 GHz) and at low field (720 MHz). The biocompatibility of SOX71 was tested in vitro and in vivo in mice. A pharmacokinetic study was performed to determine the best time frame for EPR imaging. Finally, a proof-of-concept EPR oxygen imaging was performed on a mouse model of a fibrosarcoma tumor. RESULTS SOX71 was synthesized in one step from OX071. SOX71 exhibits a narrow line EPR spectrum with a peak-to-peak linewidth of 66 mG, similar to OX071. SOX71 does not bind to albumin nor show cell toxicity for the concentrations tested up to 5 mM. No toxicity was observed after systemic delivery via intraperitoneal injection in mice at twice the dose required for EPR imaging. After the injection, the probe is readily absorbed into the bloodstream, with a peak blood concentration half an hour, post-injection. Then, the probe is quickly cleared by the kidney with a half-life of ~ 45 min. SOX71 shows long relaxation times under anoxic condition (T1e = 9.5 µs and T2e = 5.1 µs; [SOX71] = 1 mM in PBS at 37 °C, pO2 = 0 mmHg, 720 MHz). Both the relaxation rates R1e and R2e show a decreased sensitivity to pO2, leading to twice longer relaxation times under room air conditions (pO2 = 159 mmHg) compared to OX071. This is ideal for oxygen imaging in samples with a wide range of pO2. Both the relaxation rates R1e and R2e show a decreased sensitivity to self-relaxation compared to OX071, with a negligible effect of the probe concentration on R1e. SOX71 was successfully applied to image oxygen in a tumor. CONCLUSION SOX71, a succinylated derivative of OX071 was synthesized, characterized, and applied for in vivo EPR tumor oxygen imaging. SOX71 is highly biocompatible, and shows decreased sensitivity to oxygen and self-relaxation. This first report suggests that SOX71 is superior to OX071 for absolute oxygen mapping under a broad range of pO2 values.
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Affiliation(s)
- Misa A Shaw
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, WV, 26506, USA
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA
- West Virginia Clinical and Translational Sciences Institute, Morgantown, WV, 26506, USA
| | - Martin Poncelet
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, WV, 26506, USA
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA
| | - Navin Viswakarma
- Oxygen Measurement Core, O2M Technologies, LLC, Chicago, IL, 60612, USA
| | | | - Safa Hameed
- Oxygen Measurement Core, O2M Technologies, LLC, Chicago, IL, 60612, USA
| | - Teresa D Gluth
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, WV, 26506, USA
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA
| | - Werner J Geldenhuys
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, WV, 26506, USA
- Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26506, USA
| | - Emily H Hoblitzell
- Department of Microbiology, Immunology, and Cell Biology, School of Medicine, West Virginia University, Morgantown, WV, 26506, USA
| | - Timothy D Eubank
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA
- West Virginia Clinical and Translational Sciences Institute, Morgantown, WV, 26506, USA
- Department of Microbiology, Immunology, and Cell Biology, School of Medicine, West Virginia University, Morgantown, WV, 26506, USA
- West Virginia University Cancer Institute, West Virginia University, Morgantown, WV, 26506, USA
| | - Boris Epel
- Department of Radiation and Cellular Oncology, University of Chicago, Chicago, IL, 60637, USA
| | - Mrignayani Kotecha
- Oxygen Measurement Core, O2M Technologies, LLC, Chicago, IL, 60612, USA.
| | - Benoit Driesschaert
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, WV, 26506, USA.
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA.
- West Virginia Clinical and Translational Sciences Institute, Morgantown, WV, 26506, USA.
- Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26506, USA.
- Department of Radiation and Cellular Oncology, University of Chicago, Chicago, IL, 60637, USA.
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Eubank TD, Bobko AA, Hoblitzell EH, Gencheva M, Driesschaert B, Khramtsov VV. In Vivo Electron Paramagnetic Resonance Molecular Profiling of Tumor Microenvironment upon Tumor Progression to Malignancy in an Animal Model of Breast Cancer. Mol Imaging Biol 2023:10.1007/s11307-023-01847-0. [PMID: 37610610 PMCID: PMC10884355 DOI: 10.1007/s11307-023-01847-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/27/2023] [Accepted: 08/07/2023] [Indexed: 08/24/2023]
Abstract
PURPOSE Hypoxia and acidosis are recognized tumor microenvironment (TME) biomarkers of cancer progression. Alterations in cancer redox status and metabolism are also associated with elevated levels of intracellular glutathione (GSH) and interstitial inorganic phosphate (Pi). This study aims to evaluate the capability of these biomarkers to discriminate between stages and inform on a switch to malignancy. PROCEDURES These studies were performed using MMTV-PyMT( +) female transgenic mice that spontaneously develop breast cancer and emulate human tumor staging. In vivo assessment of oxygen concentration (pO2), extracellular acidity (pHe), Pi, and GSH was performed using L-band electron paramagnetic resonance spectroscopy and multifunctional trityl and GSH-sensitive nitroxide probes. RESULTS Profiling of the TME showed significant deviation of measured biomarkers upon tumor progression from pre-malignancy (pre-S4) to the malignant stage (S4). For the combined marker, HOP: (pHe × pO2)/Pi, a value > 186 indicated that the tumors were pre-malignant in 85% of the mammary glands analyzed, and when < 186, they were malignant 42% of the time. For GSH, a value < 3 mM indicated that the tumors were pre-malignant 74% of the time, and when > 3 mM, they were malignant 80% of the time. The only marker that markedly deviated as early as stage 1 (S1) from its value in pre-S1 was elevated Pi, followed by a decrease of pHe and pO2 and increase in GSH at later stages. CONCLUSION Molecular TME profiling informs on alteration of tumor redox and metabolism during tumor staging. Early elevation of interstitial Pi at S1 may reflect tumor metabolic alterations that demand elevated phosphorus supply in accordance with the high rate growth hypothesis. These metabolic changes are supported by the following decrease of pHe due to a high tumor reliance on glycolysis and increase of intracellular GSH, a major intracellular redox buffer. The appreciable decrease in TME pO2 was observed only at malignant S4, apparently as a consequence of tumor mass growth and corresponding decrease in perfusion efficacy and increase in oxygen consumption as the tumor cells proliferate.
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Affiliation(s)
- Timothy D Eubank
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA.
- Department of Microbiology, Immunology, and Cell Biology, School of Medicine, West Virginia University, Morgantown, WV, 26506, USA.
| | - Andrey A Bobko
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA
- Department of Biochemistry and Molecular Medicine, School of Medicine, West Virginia University, Morgantown, WV, 26506, USA
| | - E Hannah Hoblitzell
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA
- Department of Microbiology, Immunology, and Cell Biology, School of Medicine, West Virginia University, Morgantown, WV, 26506, USA
| | - Marieta Gencheva
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA
- Department of Biochemistry and Molecular Medicine, School of Medicine, West Virginia University, Morgantown, WV, 26506, USA
| | - Benoit Driesschaert
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, WV, 26506, USA
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26506, USA
| | - Valery V Khramtsov
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA.
- Department of Biochemistry and Molecular Medicine, School of Medicine, West Virginia University, Morgantown, WV, 26506, USA.
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6
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Rentz LE, Whetsell MA, Clayton SA, Mizener AD, Holásková I, Chapa MG, Hoblitzell EH, Eubank TD, Pistilli EE. Sexual Dimorphism of Skeletal Muscle in a Mouse Model of Breast Cancer: A Functional and Molecular Analysis. Int J Mol Sci 2023; 24:11669. [PMID: 37511427 PMCID: PMC10380440 DOI: 10.3390/ijms241411669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/17/2023] [Accepted: 07/18/2023] [Indexed: 07/30/2023] Open
Abstract
Breast cancer incidence in men is statistically rare; however, given the lack of screening in males, more advanced stages at initial diagnosis result in lower 5-year survival rates for men with breast cancer compared to women. A sexual dimorphism, with respect to the effect of tumor growth on cachexia incidence and severity, has also been reported across cancer types. The purpose of this study was to examine the sexual dimorphism of breast cancer as it pertains to skeletal muscle function and molecular composition. Using female and male transgenic PyMT mice, we tested the hypothesis that the isometric contractile properties and molecular composition of skeletal muscle would be differentially affected by breast tumors. PyMT tumor-bearing mice of each sex, corresponding to maximal tumor burden, were compared to their respective controls. RNA sequencing of skeletal muscle revealed different pathway alterations that were exclusive to each sex. Further, differentially expressed genes and pathways were substantially more abundant in female tumor mice, with only minimal dysregulation in male tumor mice, each compared to their respective controls. These differences in the transcriptome were mirrored in isometric contractile properties, with greater tumor-induced dysfunction in females than male mice, as well as muscle wasting. Collectively, these data support the concept of sexually dimorphic responses to cancer in skeletal muscle and suggest that these responses may be associated with the clinical differences in breast cancer between the sexes. The identified sex-dependent pathways within the muscle of male and female mice provide a framework to evaluate therapeutic strategies targeting tumor-associated skeletal muscle alterations.
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Affiliation(s)
- Lauren E. Rentz
- Division of Exercise Physiology, Department of Human Performance, West Virginia University School of Medicine, Morgantown, WV 26506, USA; (L.E.R.); (M.A.W.); (S.A.C.)
| | - Marcella A. Whetsell
- Division of Exercise Physiology, Department of Human Performance, West Virginia University School of Medicine, Morgantown, WV 26506, USA; (L.E.R.); (M.A.W.); (S.A.C.)
| | - Stuart A. Clayton
- Division of Exercise Physiology, Department of Human Performance, West Virginia University School of Medicine, Morgantown, WV 26506, USA; (L.E.R.); (M.A.W.); (S.A.C.)
| | - Alan D. Mizener
- Cancer Institute, West Virginia University School of Medicine, Morgantown, WV 26506, USA; (A.D.M.); (M.G.C.); (T.D.E.)
| | - Ida Holásková
- Office of Statistics, West Virginia Agriculture and Forestry Experiment Station, Davis College of Agriculture, Natural Resources and Design, West Virginia University, Morgantown, WV 26506, USA;
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University School of Medicine, Morgantown, WV 26506, USA;
| | - Matthew G. Chapa
- Cancer Institute, West Virginia University School of Medicine, Morgantown, WV 26506, USA; (A.D.M.); (M.G.C.); (T.D.E.)
| | - Emily H. Hoblitzell
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University School of Medicine, Morgantown, WV 26506, USA;
| | - Timothy D. Eubank
- Cancer Institute, West Virginia University School of Medicine, Morgantown, WV 26506, USA; (A.D.M.); (M.G.C.); (T.D.E.)
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University School of Medicine, Morgantown, WV 26506, USA;
| | - Emidio E. Pistilli
- Division of Exercise Physiology, Department of Human Performance, West Virginia University School of Medicine, Morgantown, WV 26506, USA; (L.E.R.); (M.A.W.); (S.A.C.)
- Cancer Institute, West Virginia University School of Medicine, Morgantown, WV 26506, USA; (A.D.M.); (M.G.C.); (T.D.E.)
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University School of Medicine, Morgantown, WV 26506, USA;
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7
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Rentz LE, Whetsell M, Clayton SA, Mizener AD, Holásková I, Chapa MG, Hoblitzell EH, Eubank TD, Pistilli EE. Sexual Dimorphism of Skeletal Muscle in a Mouse Model of Breast Cancer: A Functional and Molecular Analysis. bioRxiv 2023:2023.06.07.544049. [PMID: 37362158 PMCID: PMC10288531 DOI: 10.1101/2023.06.07.544049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
Breast cancer incidence in men is statistically rare; however, given the lack of screening in males, more advanced stages at initial diagnosis results in lower 5-year survival rates for men with breast cancer compared to women. A sexual dimorphism, with respect to the effect of tumor growth on cachexia incidence and severity, has also been reported across cancer types. The purpose of this study was to examine the sexual dimorphism of breast cancer as it pertains to skeletal muscle function and molecular composition. Using female and male transgenic PyMT mice, we tested the hypothesis that isometric contractile properties and molecular composition of skeletal muscle would be differentially affected by breast tumors. PyMT tumor-bearing mice of each sex, corresponding to maximal tumor burden, were compared to their respective controls. RNA-sequencing of skeletal muscle revealed different pathway alterations that were exclusive to each sex. Further, differentially expressed genes and pathways were substantially more abundant in female tumor mice, with only minimal dysregulation in male tumor mice, each compared to their respective controls. These differences in the transcriptome were mirrored in isometric contractile properties, with greater tumor-induced dysfunction in females than male mice, as well as muscle wasting. Collectively, these data support the concept of sexually dimorphic responses to cancer in skeletal muscle and suggest these responses may be associated with the clinical differences in breast cancer between the sexes. The identified sex-dependent pathways within muscle of male and female mice provide a framework to evaluate therapeutic strategies targeting tumor-associated skeletal muscle alterations.
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Affiliation(s)
- Lauren E. Rentz
- Division of Exercise Physiology, Department of Human Performance, West Virginia University School of Medicine, Morgantown, WV, 26506
| | - Marcella Whetsell
- Division of Exercise Physiology, Department of Human Performance, West Virginia University School of Medicine, Morgantown, WV, 26506
| | - Stuart A. Clayton
- Division of Exercise Physiology, Department of Human Performance, West Virginia University School of Medicine, Morgantown, WV, 26506
| | - Alan D. Mizener
- Cancer Institute, West Virginia University School of Medicine, Morgantown, WV, 26506
| | - Ida Holásková
- Office of Statistics, West Virginia Agriculture and Forestry Experiment Station, Davis College of Agriculture, Natural Resources and Design, West Virginia University, Morgantown, WV, 26506
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University School of Medicine, Morgantown, WV, 26506
| | - Matthew G. Chapa
- Cancer Institute, West Virginia University School of Medicine, Morgantown, WV, 26506
| | - E. Hannah Hoblitzell
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University School of Medicine, Morgantown, WV, 26506
| | - Timothy D. Eubank
- Cancer Institute, West Virginia University School of Medicine, Morgantown, WV, 26506
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University School of Medicine, Morgantown, WV, 26506
| | - Emidio E. Pistilli
- Division of Exercise Physiology, Department of Human Performance, West Virginia University School of Medicine, Morgantown, WV, 26506
- Cancer Institute, West Virginia University School of Medicine, Morgantown, WV, 26506
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University School of Medicine, Morgantown, WV, 26506
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8
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Steinberger KJ, Eubank TD. The Underexplored Landscape of Hypoxia-Inducible Factor 2 Alpha and Potential Roles in Tumor Macrophages: A Review. Oxygen (Basel) 2023; 3:45-76. [PMID: 37124241 PMCID: PMC10137047 DOI: 10.3390/oxygen3010005] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Low tissue oxygenation, termed hypoxia, is a characteristic of solid tumors with negative consequences. Tumor-associated macrophages (TAMs) accumulate in hypoxic tumor regions and correlate with worse outcomes in cancer patients across several tumor types. Thus, the molecular mechanism in which macrophages respond to low oxygen tension has been increasingly investigated in the last decade. Hypoxia stabilizes a group of hypoxia-inducible transcription factors (HIFs) reported to drive transcriptional programs involved in cell survival, metabolism, and angiogenesis. Though both tumor macrophage HIF-1α and HIF-2α correlate with unfavorable tumor microenvironments, most research focuses on HIF-1α as the master regulator of hypoxia signaling, because HIF-1α expression was originally identified in several cancer types and correlates with worse outcome in cancer patients. The relative contribution of each HIFα subunit to cell phenotypes is poorly understood especially in TAMs. Once thought to have overlapping roles, recent investigation of macrophage HIF-2α has demonstrated a diverse function from HIF-1α. Little work has been published on the differential role of hypoxia-dependent macrophage HIF-2α when compared to HIF-1α in the context of tumor biology. This review highlights cellular HIF-2α functions and emphasizes the gap in research investigating oxygen-dependent functions of tumor macrophage HIF-2α.
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Affiliation(s)
- Kayla J. Steinberger
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26505, USA
- In Vivo Multifunctional Magnetic Resonance Center, West Virginia University, Morgantown, WV 26505, USA
- West Virginia University Cancer Institute, Morgantown, WV 26505, USA
- Correspondence: (K.J.S.); (T.D.E.)
| | - Timothy D. Eubank
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26505, USA
- In Vivo Multifunctional Magnetic Resonance Center, West Virginia University, Morgantown, WV 26505, USA
- West Virginia University Cancer Institute, Morgantown, WV 26505, USA
- Correspondence: (K.J.S.); (T.D.E.)
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9
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Gluth TD, Poncelet M, Gencheva M, Hoblitzell EH, Khramtsov VV, Eubank TD, Driesschaert B. Biocompatible Monophosphonated Trityl Spin Probe, HOPE71, for In Vivo Measurement of pO 2, pH, and [P i] by Electron Paramagnetic Resonance Spectroscopy. Anal Chem 2023; 95:946-954. [PMID: 36537829 PMCID: PMC9852220 DOI: 10.1021/acs.analchem.2c03476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Hypoxia, acidosis, and elevated inorganic phosphate concentration are characteristics of the tumor microenvironment in solid tumors. There are a number of methods for measuring each parameter individually in vivo, but the only method to date for noninvasive measurement of all three variables simultaneously in vivo is electron paramagnetic spectroscopy paired with a monophosphonated trityl radical, pTAM/HOPE. While HOPE has been successfully used for in vivo studies upon intratissue injection, it cannot be delivered intravenously due to systemic toxicity and albumin binding, which causes significant signal loss. Therefore, we present HOPE71, a monophosphonated trityl radical derived from the very biocompatible trityl probe, Ox071. Here, we describe a straightforward synthesis of HOPE71 starting with Ox071 and report its EPR sensitivities to pO2, pH, and [Pi] with X-band and L-band EPR spectroscopy. We also confirm that HOPE71 lacks albumin binding, shows low cytotoxicity, and has systemic tolerance. Finally, we demonstrate its ability to profile the tumor microenvironment in vivo in a mouse model of breast cancer.
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Affiliation(s)
- Teresa D. Gluth
- Department of Pharmaceutical Sciences, West Virginia University, School of Pharmacy, Morgantown, WV, 26506, USA
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA
| | - Martin Poncelet
- Department of Pharmaceutical Sciences, West Virginia University, School of Pharmacy, Morgantown, WV, 26506, USA
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA
| | - Marieta Gencheva
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA
- Department of Biochemistry and Molecular Medicine, West Virginia University, School of Medicine, Morgantown, WV, 26506, USA
| | - Emily H. Hoblitzell
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, School of Medicine, Morgantown, WV, 26506, USA
| | - Valery V. Khramtsov
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA
- Department of Biochemistry and Molecular Medicine, West Virginia University, School of Medicine, Morgantown, WV, 26506, USA
| | - Timothy D. Eubank
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, School of Medicine, Morgantown, WV, 26506, USA
| | - Benoit Driesschaert
- Department of Pharmaceutical Sciences, West Virginia University, School of Pharmacy, Morgantown, WV, 26506, USA
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, WV, 26506, USA
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10
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Poncelet M, Ngendahimana T, Gluth TD, Hoblitzell EH, Eubank TD, Eaton GR, Eaton SS, Driesschaert B. Synthesis and characterization of a biocompatible 13C 1 isotopologue of trityl radical OX071 for in vivo EPR viscometry. Analyst 2022; 147:5643-5648. [PMID: 36373434 PMCID: PMC9729415 DOI: 10.1039/d2an01527g] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2023]
Abstract
We describe the synthesis, characterization, and application of an isotopologue of the trityl radical OX071, labeled with 13C at the central carbon (13C1). This spin probe features large anisotropy of the hyperfine coupling with the 13C1 (I = 1/2), leading to an EPR spectrum highly sensitive to molecular tumbling. The high biocompatibility and lack of interaction with blood albumin allow for systemic delivery and in vivo measurement of tissue microviscosity by EPR.
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Affiliation(s)
- Martin Poncelet
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, WV, 26506, USA
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA.
| | - Thacien Ngendahimana
- Department of Chemistry and Biochemistry, University of Denver, Denver, CO 80210, USA
| | - Teresa D Gluth
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, WV, 26506, USA
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA.
| | - Emily H Hoblitzell
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA.
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, School of Medicine, Morgantown, WV, 26506, USA
| | - Timothy D Eubank
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA.
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, School of Medicine, Morgantown, WV, 26506, USA
| | - Gareth R Eaton
- Department of Chemistry and Biochemistry, University of Denver, Denver, CO 80210, USA
| | - Sandra S Eaton
- Department of Chemistry and Biochemistry, University of Denver, Denver, CO 80210, USA
| | - Benoit Driesschaert
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, WV, 26506, USA
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, 26506, USA.
- Eugene Bennett Department of Chemistry, West Virginia University, WV, 26506, USA
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11
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O'Connell RC, Tseytlin O, Bobko AA, Eubank TD, Tseytlin M. Rapid scan EPR: Automated digital resonator control for low-latency data acquisition. J Magn Reson 2022; 345:107308. [PMID: 36356489 PMCID: PMC10266206 DOI: 10.1016/j.jmr.2022.107308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 10/05/2022] [Accepted: 10/06/2022] [Indexed: 06/05/2023]
Abstract
Automation has become an essential component of modern scientific instruments which often capture large amounts of complex dynamic data. Algorithms are developed to read multiple sensors in parallel with data acquisition and to adjust instrumental parameters on the fly. Decisions are made on a time scale unattainable to the human operator. In addition to speed, automation reduces human error, improves the reproducibility of experiments, and improves the reliability of acquired data. An automatic digital control (ADiC) was developed to reliably sustain critical coupling of a resonator over a wide range of time-varying loading conditions. The ADiC uses the computational power of a microcontroller that directly communicates with all system components independent of a personal computer (PC). The PC initiates resonator tuning and coupling by sending a command to MC via serial port. After receiving the command, ADiC establishes critical coupling conditions within approximately 5 ms. A printed circuit board resonator was designed to permit digital control. The performance of the resonator together with the ADiC was evaluated by varying the resonator loading from empty to heavily loaded. For the loading, samples containing aqueous sodium chloride that strongly absorb electromagnetic waves were used. A previously reported rapid scan (RS) electron paramagnetic resonance (EPR) imaging instrument was upgraded by the incorporation of ADiC. RS spectra and an in vivo image of oxygen in a mouse tumor model have been acquired using the upgraded system. ADiC robustly sustained critical coupling of the resonator to the transmission line during these measurements. The design implemented in this study can be used in slow-scan and pulsed EPR with modifications.
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Affiliation(s)
- Ryan C O'Connell
- Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, WV 26506, USA; In Vivo Multifunctional Magnetic Resonance Center at Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA
| | - Oxana Tseytlin
- Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, WV 26506, USA; In Vivo Multifunctional Magnetic Resonance Center at Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA
| | - Andrey A Bobko
- Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, WV 26506, USA; In Vivo Multifunctional Magnetic Resonance Center at Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA
| | - Timothy D Eubank
- In Vivo Multifunctional Magnetic Resonance Center at Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA; Department of Microbiology, Immunology and Cell Biology, West Virginia University, Morgantown, WV 26506, USA
| | - Mark Tseytlin
- Department of Biochemistry and Molecular Medicine, West Virginia University, Morgantown, WV 26506, USA; West Virginia University Cancer Institute, Morgantown, WV 26506, USA; In Vivo Multifunctional Magnetic Resonance Center at Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA.
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12
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Ye Q, Hickey J, Summers K, Falatovich B, Gencheva M, Eubank TD, Ivanov AV, Guo NL. Multi-Omics Immune Interaction Networks in Lung Cancer Tumorigenesis, Proliferation, and Survival. Int J Mol Sci 2022; 23:ijms232314978. [PMID: 36499305 PMCID: PMC9738413 DOI: 10.3390/ijms232314978] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/18/2022] [Accepted: 11/25/2022] [Indexed: 12/02/2022] Open
Abstract
There are currently no effective biomarkers for prognosis and optimal treatment selection to improve non-small cell lung cancer (NSCLC) survival outcomes. This study further validated a seven-gene panel for diagnosis and prognosis of NSCLC using RNA sequencing and proteomic profiles of patient tumors. Within the seven-gene panel, ZNF71 expression combined with dendritic cell activities defined NSCLC patient subgroups (n = 966) with distinct survival outcomes (p = 0.04, Kaplan-Meier analysis). ZNF71 expression was significantly associated with the activities of natural killer cells (p = 0.014) and natural killer T cells (p = 0.003) in NSCLC patient tumors (n = 1016) using Chi-squared tests. Overexpression of ZNF71 resulted in decreased expression of multiple components of the intracellular intrinsic and innate immune systems, including dsRNA and dsDNA sensors. Multi-omics networks of ZNF71 and the intracellular intrinsic and innate immune systems were computed as relevant to NSCLC tumorigenesis, proliferation, and survival using patient clinical information and in-vitro CRISPR-Cas9/RNAi screening data. From these networks, pan-sensitive and pan-resistant genes to 21 NCCN-recommended drugs for treating NSCLC were selected. Based on the gene associations with patient survival and in-vitro CRISPR-Cas9, RNAi, and drug screening data, MEK1/2 inhibitors PD-198306 and U-0126, VEGFR inhibitor ZM-306416, and IGF-1R inhibitor PQ-401 were discovered as potential targeted therapy that may also induce an immune response for treating NSCLC.
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Affiliation(s)
- Qing Ye
- West Virginia University Cancer Institute, Morgantown, WV 26506, USA
| | - Justin Hickey
- West Virginia University Cancer Institute, Morgantown, WV 26506, USA
| | - Kathleen Summers
- West Virginia University Cancer Institute, Morgantown, WV 26506, USA
| | | | - Marieta Gencheva
- Department of Biochemistry, School of Medicine, West Virginia University, Morgantown, WV 26506, USA
| | - Timothy D. Eubank
- West Virginia University Cancer Institute, Morgantown, WV 26506, USA
- Department of Microbiology, Immunology, and Cell Biology, School of Medicine, West Virginia University, Morgantown, WV 26506, USA
| | - Alexey V. Ivanov
- West Virginia University Cancer Institute, Morgantown, WV 26506, USA
- Department of Biochemistry, School of Medicine, West Virginia University, Morgantown, WV 26506, USA
- Correspondence: (A.V.I.); (N.L.G.)
| | - Nancy Lan Guo
- West Virginia University Cancer Institute, Morgantown, WV 26506, USA
- Department of Occupational and Environmental Health Sciences, School of Public Health, West Virginia University, Morgantown, WV 26506, USA
- Correspondence: (A.V.I.); (N.L.G.)
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13
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Gluth TD, Poncelet M, DeVience S, Gencheva M, Hoblitzell EH, Khramtsov VV, Eubank TD, Driesschaert B. Large-scale synthesis of a monophosphonated tetrathiatriarylmethyl spin probe for concurrent in vivo measurement of pO 2, pH and inorganic phosphate by EPR. RSC Adv 2021; 11:25951-25954. [PMID: 34354828 PMCID: PMC8314523 DOI: 10.1039/d1ra04551b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 07/21/2021] [Indexed: 11/21/2022] Open
Abstract
Low-field electron paramagnetic resonance spectroscopy paired with pTAM, a mono-phosphonated triarylmethyl radical, is an unmatched technique for concurrent and non-invasive measurement of oxygen concentration, pH, and inorganic phosphate concentration for in vivo investigations. However, the prior reported synthesis is limited by its low yield and poor scalability, making wide-spread application of pTAM unfeasible. Here, we report a new strategy for the synthesis of pTAM with significantly greater yields demonstrated on a large scale. We also present a standalone application with user-friendly interface for automatic spectrum fitting and extraction of pO2, pH, and [Pi] values. Finally, we confirm that pTAM remains in the extracellular space and has low cytotoxicity appropriate for local injection.
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Affiliation(s)
- Teresa D Gluth
- Department of Pharmaceutical Sciences, West Virginia University, School of Pharmacy Morgantown WV 26506 USA .,In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University Morgantown WV 26506 USA
| | - Martin Poncelet
- Department of Pharmaceutical Sciences, West Virginia University, School of Pharmacy Morgantown WV 26506 USA .,In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University Morgantown WV 26506 USA
| | - Stephen DeVience
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University Morgantown WV 26506 USA.,Department of Biochemistry, West Virginia University, School of Medicine Morgantown WV 26506 USA
| | - Marieta Gencheva
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University Morgantown WV 26506 USA.,Department of Biochemistry, West Virginia University, School of Medicine Morgantown WV 26506 USA
| | - Emily H Hoblitzell
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University Morgantown WV 26506 USA.,Department of Microbiology, Immunology, and Cell Biology, West Virginia University, School of Medicine Morgantown WV 26506 USA
| | - Valery V Khramtsov
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University Morgantown WV 26506 USA.,Department of Biochemistry, West Virginia University, School of Medicine Morgantown WV 26506 USA
| | - Timothy D Eubank
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University Morgantown WV 26506 USA.,Department of Microbiology, Immunology, and Cell Biology, West Virginia University, School of Medicine Morgantown WV 26506 USA
| | - Benoit Driesschaert
- Department of Pharmaceutical Sciences, West Virginia University, School of Pharmacy Morgantown WV 26506 USA .,In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University Morgantown WV 26506 USA
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14
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Mihalik NE, Wen S, Driesschaert B, Eubank TD. Formulation and In Vitro Characterization of PLGA/PLGA-PEG Nanoparticles Loaded with Murine Granulocyte-Macrophage Colony-Stimulating Factor. AAPS PharmSciTech 2021; 22:191. [PMID: 34169366 DOI: 10.1208/s12249-021-02049-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 05/11/2021] [Indexed: 02/06/2023] Open
Abstract
Granulocyte-macrophage colony-stimulating factor (GM-CSF) has demonstrated notable clinical activity in cancer immunotherapy, but it is limited by systemic toxicities, poor bioavailability, rapid clearance, and instability in vivo. Nanoparticles (NPs) may overcome these limitations and provide a mechanism for passive targeting of tumors. This study aimed to develop GM-CSF-loaded PLGA/PLGA-PEG NPs and evaluate them in vitro as a potential candidate for in vivo administration. NPs were created by a phase-separation technique that did not require toxic/protein-denaturing solvents or harsh agitation techniques and encapsulated GM-CSF in a more stable precipitated form. NP sizes were within 200 nm for enhanced permeability and retention (EPR) effect with negative zeta potentials, spherical morphology, and high entrapment efficiencies. The optimal formulation was identified by sustained release of approximately 70% of loaded GM-CSF over 24 h, alongside an average size of 143 ± 35 nm and entrapment efficiency of 84 ± 5%. These NPs were successfully freeze-dried in 5% (w/v) hydroxypropyl-β-cyclodextrin for long-term storage and further characterized. Bioactivity of released GM-CSF was determined by observing GM-CSF receptor activation on murine monocytes and remained fully intact. NPs were not cytotoxic to murine bone marrow-derived macrophages (BMDMs) at concentrations up to 1 mg/mL as determined by MTT and trypan blue exclusion assays. Lastly, NP components generated no significant transcription of inflammation-regulating genes from BMDMs compared to IFNγ+LPS "M1" controls. This report lays the preliminary groundwork to validate in vivo studies with GM-CSF-loaded PLGA/PEG-PLGA NPs for tumor immunomodulation. Overall, these data suggest that in vivo delivery will be well tolerated.
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15
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Ahmad RS, Eubank TD, Lukomski S, Boone BA. Immune Cell Modulation of the Extracellular Matrix Contributes to the Pathogenesis of Pancreatic Cancer. Biomolecules 2021; 11:biom11060901. [PMID: 34204306 PMCID: PMC8234537 DOI: 10.3390/biom11060901] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 06/07/2021] [Accepted: 06/13/2021] [Indexed: 12/13/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a highly lethal malignancy with a five-year survival rate of only 9%. PDAC is characterized by a dense, fibrotic stroma composed of extracellular matrix (ECM) proteins. This desmoplastic stroma is a hallmark of PDAC, representing a significant physical barrier that is immunosuppressive and obstructs penetration of cytotoxic chemotherapy agents into the tumor microenvironment (TME). Additionally, dense ECM promotes hypoxia, making tumor cells refractive to radiation therapy and alters their metabolism, thereby supporting proliferation and survival. In this review, we outline the significant contribution of fibrosis to the pathogenesis of pancreatic cancer, with a focus on the cross talk between immune cells and pancreatic stellate cells that contribute to ECM deposition. We emphasize the cellular mechanisms by which neutrophils and macrophages, specifically, modulate the ECM in favor of PDAC-progression. Furthermore, we investigate how activated stellate cells and ECM influence immune cells and promote immunosuppression in PDAC. Finally, we summarize therapeutic strategies that target the stroma and hinder immune cell promotion of fibrogenesis, which have unfortunately led to mixed results. An enhanced understanding of the complex interactions between the pancreatic tumor ECM and immune cells may uncover novel treatment strategies that are desperately needed for this devastating disease.
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Affiliation(s)
- Ramiz S. Ahmad
- Department of Surgery, West Virginia University, Morgantown, WV 26506, USA;
| | - Timothy D. Eubank
- Department of Microbiology, Immunology and Cell Biology, West Virginia University, Morgantown, WV 26506, USA; (T.D.E.); (S.L.)
- West Virginia University Cancer Institute, West Virginia University, Morgantown, WV 26506, USA
| | - Slawomir Lukomski
- Department of Microbiology, Immunology and Cell Biology, West Virginia University, Morgantown, WV 26506, USA; (T.D.E.); (S.L.)
- West Virginia University Cancer Institute, West Virginia University, Morgantown, WV 26506, USA
| | - Brian A. Boone
- Department of Surgery, West Virginia University, Morgantown, WV 26506, USA;
- Department of Microbiology, Immunology and Cell Biology, West Virginia University, Morgantown, WV 26506, USA; (T.D.E.); (S.L.)
- West Virginia University Cancer Institute, West Virginia University, Morgantown, WV 26506, USA
- Correspondence:
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16
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Velayutham M, Poncelet M, Eubank TD, Driesschaert B, Khramtsov VV. Biological Applications of Electron Paramagnetic Resonance Viscometry Using a 13C-Labeled Trityl Spin Probe. Molecules 2021; 26:molecules26092781. [PMID: 34066858 PMCID: PMC8125944 DOI: 10.3390/molecules26092781] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/05/2021] [Accepted: 05/06/2021] [Indexed: 12/27/2022] Open
Abstract
Alterations in viscosity of biological fluids and tissues play an important role in health and diseases. It has been demonstrated that the electron paramagnetic resonance (EPR) spectrum of a 13C-labeled trityl spin probe (13C-dFT) is highly sensitive to the local viscosity of its microenvironment. In the present study, we demonstrate that X-band (9.5 GHz) EPR viscometry using 13C-dFT provides a simple tool to accurately measure the microviscosity of human blood in microliter volumes obtained from healthy volunteers. An application of low-field L-band (1.2 GHz) EPR with a penetration depth of 1–2 cm allowed for microviscosity measurements using 13C-dFT in the living tissues from isolated organs and in vivo in anesthetized mice. In summary, this study demonstrates that EPR viscometry using a 13C-dFT probe can be used to noninvasively and rapidly measure the microviscosity of blood and interstitial fluids in living tissues and potentially to evaluate this biophysical marker of microenvironment under various physiological and pathological conditions in preclinical and clinical settings.
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Affiliation(s)
- Murugesan Velayutham
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA; (M.V.); (M.P.); (T.D.E.)
- Department of Biochemistry, School of Medicine, West Virginia University, Morgantown, WV 26506, USA
| | - Martin Poncelet
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA; (M.V.); (M.P.); (T.D.E.)
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, WV 26506, USA
| | - Timothy D. Eubank
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA; (M.V.); (M.P.); (T.D.E.)
- Department of Microbiology, Immunology & Cell Biology, School of Medicine, West Virginia University, Morgantown, WV 26506, USA
| | - Benoit Driesschaert
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA; (M.V.); (M.P.); (T.D.E.)
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, WV 26506, USA
- Correspondence: (B.D.); (V.V.K.); Tel.: +1-304-293-7401 (B.D.); +1-304-293-4470 (V.V.K.)
| | - Valery V. Khramtsov
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA; (M.V.); (M.P.); (T.D.E.)
- Department of Biochemistry, School of Medicine, West Virginia University, Morgantown, WV 26506, USA
- Correspondence: (B.D.); (V.V.K.); Tel.: +1-304-293-7401 (B.D.); +1-304-293-4470 (V.V.K.)
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17
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Ye Q, Mohamed R, Dakhlallah D, Gencheva M, Hu G, Pearce MC, Kolluri SK, Marsh CB, Eubank TD, Ivanov AV, Guo NL. Molecular Analysis of ZNF71 KRAB in Non-Small-Cell Lung Cancer. Int J Mol Sci 2021; 22:ijms22073752. [PMID: 33916522 PMCID: PMC8038441 DOI: 10.3390/ijms22073752] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 03/29/2021] [Accepted: 03/30/2021] [Indexed: 02/07/2023] Open
Abstract
Our previous study found that zinc finger protein 71 (ZNF71) mRNA expression was associated with chemosensitivity and its protein expression was prognostic of non-small-cell lung cancer (NSCLC). The Krüppel associated box (KRAB) transcriptional repression domain is commonly present in human zinc finger proteins, which are linked to imprinting, silencing of repetitive elements, proliferation, apoptosis, and cancer. This study revealed that ZNF71 KRAB had a significantly higher expression than the ZNF71 KRAB-less isoform in NSCLC tumors (n = 197) and cell lines (n = 117). Patients with higher ZNF71 KRAB expression had a significantly worse survival outcome than patients with lower ZNF71 KRAB expression (log-rank p = 0.04; hazard ratio (HR): 1.686 [1.026, 2.771]), whereas ZNF71 overall and KRAB-less expression levels were not prognostic in the same patient cohort. ZNF71 KRAB expression was associated with epithelial-to-mesenchymal transition (EMT) in both patient tumors and cell lines. ZNF71 KRAB was overexpressed in NSCLC cell lines resistant to docetaxel and paclitaxel treatment compared to chemo-sensitive cell lines, consistent with its association with poor prognosis in patients. Therefore, ZNF71 KRAB isoform is a more effective prognostic factor than ZNF71 overall and KRAB-less expression for NSCLC. Functional analysis using CRISPR-Cas9 and RNA interference (RNAi) screening data indicated that a knockdown/knockout of ZNF71 did not significantly affect NSCLC cell proliferation in vitro.
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Affiliation(s)
- Qing Ye
- WVU Cancer Institute, West Virginia University, Morgantown, WV 26506, USA; (Q.Y.); (R.M.); (D.D.); (G.H.); (T.D.E.); (A.V.I.)
- Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, WV 26506, USA
| | - Rehab Mohamed
- WVU Cancer Institute, West Virginia University, Morgantown, WV 26506, USA; (Q.Y.); (R.M.); (D.D.); (G.H.); (T.D.E.); (A.V.I.)
| | - Duaa Dakhlallah
- WVU Cancer Institute, West Virginia University, Morgantown, WV 26506, USA; (Q.Y.); (R.M.); (D.D.); (G.H.); (T.D.E.); (A.V.I.)
- Department of Microbiology, Immunology & Cell Biology, West Virginia University, Morgantown, WV 26506, USA;
- Institute of Global Health and Human Ecology, School of Sciences & Engineering, The American University of Cairo, New Cairo 11835, Egypt
| | - Marieta Gencheva
- Department of Microbiology, Immunology & Cell Biology, West Virginia University, Morgantown, WV 26506, USA;
| | - Gangqing Hu
- WVU Cancer Institute, West Virginia University, Morgantown, WV 26506, USA; (Q.Y.); (R.M.); (D.D.); (G.H.); (T.D.E.); (A.V.I.)
- Department of Microbiology, Immunology & Cell Biology, West Virginia University, Morgantown, WV 26506, USA;
| | - Martin C. Pearce
- Cancer Research Laboratory, Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR 97331, USA; (M.C.P.); (S.K.K.)
| | - Siva Kumar Kolluri
- Cancer Research Laboratory, Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR 97331, USA; (M.C.P.); (S.K.K.)
| | - Clay B. Marsh
- Department of Medicine, West Virginia University, Morgantown, WV 26506, USA;
| | - Timothy D. Eubank
- WVU Cancer Institute, West Virginia University, Morgantown, WV 26506, USA; (Q.Y.); (R.M.); (D.D.); (G.H.); (T.D.E.); (A.V.I.)
- Department of Microbiology, Immunology & Cell Biology, West Virginia University, Morgantown, WV 26506, USA;
| | - Alexey V. Ivanov
- WVU Cancer Institute, West Virginia University, Morgantown, WV 26506, USA; (Q.Y.); (R.M.); (D.D.); (G.H.); (T.D.E.); (A.V.I.)
- Department of Biochemistry, West Virginia University, Morgantown, WV 26506, USA
| | - Nancy Lan Guo
- WVU Cancer Institute, West Virginia University, Morgantown, WV 26506, USA; (Q.Y.); (R.M.); (D.D.); (G.H.); (T.D.E.); (A.V.I.)
- Department of Occupational and Environmental Health Sciences, West Virginia University, Morgantown, WV 26506, USA
- Correspondence: ; Tel.: +1-304-293-6455
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Steinberger KJ, Forget MA, Bobko AA, Mihalik NE, Gencheva M, Roda JM, Cole SL, Mo X, Hoblitzell EH, Evans R, Gross AC, Moldovan L, Marsh CB, Khramtsov VV, Eubank TD. Correction: Hypoxia-Inducible Factor α Subunits Regulate Tie2-Expressing Macrophages That Influence Tumor Oxygen and Perfusion in Murine Breast Cancer. J Immunol 2020; 205:3231. [PMID: 33115855 PMCID: PMC7853301 DOI: 10.4049/jimmunol.2001134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
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19
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Madan E, Peixoto ML, Dimitrion P, Eubank TD, Yekelchyk M, Talukdar S, Fisher PB, Mi QS, Moreno E, Gogna R. Cell Competition Boosts Clonal Evolution and Hypoxic Selection in Cancer. Trends Cell Biol 2020; 30:967-978. [PMID: 33160818 DOI: 10.1016/j.tcb.2020.10.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 10/01/2020] [Accepted: 10/05/2020] [Indexed: 12/17/2022]
Abstract
The comparison of fitness between cells leads to the elimination of less competent cells in the presence of more competent neighbors via cell competition (CC). This phenomenon has been linked with several cancer-related genes and thus may play an important role in cancer. Various processes are involved in the regulation of tumor initiation and growth, including tumor hypoxia, clonal stem cell selection, and immune cell response, all of which have been recently shown to have a potential connection with the mechanisms involved in CC. This review aims to unravel the relation between these processes and competitive cell interactions and how this affects disease progression.
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Affiliation(s)
- Esha Madan
- Champalimaud Centre for the Unknown, 1400-038 Lisbon, Portugal
| | | | - Peter Dimitrion
- Center for Cutaneous Biology and Immunology, Department of Dermatology, Henry Ford Health System, Detroit, MI, USA; Immunology Research Program, Henry Ford Cancer Institute, Henry Ford Health System, Detroit, MI, USA; Department of Biochemistry, Microbiology and Immunology, Wayne State University Medical School, Detroit, MI, USA
| | - Timothy D Eubank
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, USA; Department of Microbiology, Immunology, and Cell Biology, West Virginia University School of Medicine, Morgantown, WV, USA
| | - Michail Yekelchyk
- Department of Cardiac Development and Remodeling, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Sarmistha Talukdar
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, VA, USA; VCU Massey Cancer Center, Virginia Commonwealth University, School of Medicine, Richmond, VA, USA
| | - Paul B Fisher
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, VA, USA; VCU Massey Cancer Center, Virginia Commonwealth University, School of Medicine, Richmond, VA, USA
| | - Qing-Sheng Mi
- Center for Cutaneous Biology and Immunology, Department of Dermatology, Henry Ford Health System, Detroit, MI, USA; Immunology Research Program, Henry Ford Cancer Institute, Henry Ford Health System, Detroit, MI, USA; Department of Biochemistry, Microbiology and Immunology, Wayne State University Medical School, Detroit, MI, USA
| | - Eduardo Moreno
- Champalimaud Centre for the Unknown, 1400-038 Lisbon, Portugal.
| | - Rajan Gogna
- Champalimaud Centre for the Unknown, 1400-038 Lisbon, Portugal.
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20
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Steinberger KJ, Forget MA, Bobko AA, Mihalik NE, Gencheva M, Roda JM, Cole SL, Mo X, Hoblitzell EH, Evans R, Gross AC, Moldovan L, Marsh CB, Khramstov VV, Eubank TD. Hypoxia-Inducible Factor α Subunits Regulate Tie2-Expressing Macrophages That Influence Tumor Oxygen and Perfusion in Murine Breast Cancer. J Immunol 2020; 205:2301-2311. [PMID: 32938724 PMCID: PMC7596922 DOI: 10.4049/jimmunol.2000185] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 08/17/2020] [Indexed: 12/27/2022]
Abstract
Tie2-expressing monocytes/macrophages (TEMs) are a distinct subset of proangiogenic monocytes selectively recruited to tumors in breast cancer. Because of the hypoxic nature of solid tumors, we investigated if oxygen, via hypoxia-inducible transcription factors HIF-1α and HIF-2α, regulates TEM function in the hypoxic tumor microenvironment. We orthotopically implanted PyMT breast tumor cells into the mammary fat pads of syngeneic LysMcre, HIF-1α fl/fl /LysMcre, or HIF-2α fl/fl /LysMcre mice and evaluated the tumor TEM population. There was no difference in the percentage of tumor macrophages among the mouse groups. In contrast, HIF-1α fl/fl /LysMcre mice had a significantly smaller percentage of tumor TEMs compared with control and HIF-2α fl/fl /LysMcre mice. Proangiogenic TEMs in macrophage HIF-2α-deficient tumors presented significantly more CD31+ microvessel density but exacerbated hypoxia and tissue necrosis. Reduced numbers of proangiogenic TEMs in macrophage HIF-1α-deficient tumors presented significantly less microvessel density but tumor vessels that were more functional as lectin injection revealed more perfusion, and functional electron paramagnetic resonance analysis revealed more oxygen in those tumors. Macrophage HIF-1α-deficient tumors also responded significantly to chemotherapy. These data introduce a previously undescribed and counterintuitive prohypoxia role for proangiogenic TEMs in breast cancer which is, in part, suppressed by HIF-2α.
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Affiliation(s)
- Kayla J Steinberger
- In Vivo Multifunctional Magnetic Resonance Center, West Virginia University, Morgantown, WV 26506
- Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
| | - Mary A Forget
- Division of Pulmonary Medicine, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210
- Molecular, Cellular and Developmental Biology Program, The Ohio State University, Columbus, OH 43210
| | - Andrey A Bobko
- Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506
- West Virginia University Cancer Institute, Morgantown, WV 26506
| | - Nicole E Mihalik
- Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506
- West Virginia University Cancer Institute, Morgantown, WV 26506
| | - Marieta Gencheva
- In Vivo Multifunctional Magnetic Resonance Center, West Virginia University, Morgantown, WV 26506
- Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506
| | - Julie M Roda
- Division of Pulmonary Medicine, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210
| | - Sara L Cole
- Division of Pulmonary Medicine, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210
- Campus Microscopy and Imaging Facility, The Ohio State University, Columbus, OH 43210
| | - Xiaokui Mo
- Division of Pulmonary Medicine, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210
- Center for Biostatistics, The Ohio State University, Columbus, OH 43210; and
| | - E Hannah Hoblitzell
- In Vivo Multifunctional Magnetic Resonance Center, West Virginia University, Morgantown, WV 26506
- Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506
| | - Randall Evans
- Division of Pulmonary Medicine, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210
| | - Amy C Gross
- Division of Pulmonary Medicine, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210
| | - Leni Moldovan
- Division of Pulmonary Medicine, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210
| | - Clay B Marsh
- Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506
| | - Valery V Khramstov
- In Vivo Multifunctional Magnetic Resonance Center, West Virginia University, Morgantown, WV 26506
- Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506
- West Virginia University Cancer Institute, Morgantown, WV 26506
- Department of Biochemistry, West Virginia University, Morgantown, WV 26506
| | - Timothy D Eubank
- In Vivo Multifunctional Magnetic Resonance Center, West Virginia University, Morgantown, WV 26506;
- Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
- West Virginia University Cancer Institute, Morgantown, WV 26506
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21
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Kofina V, Demirer M, Erdal BS, Eubank TD, Yildiz VO, Tatakis DN, Leblebicioglu B. Bone grafting history affects soft tissue healing following implant placement. J Periodontol 2020; 92:234-243. [PMID: 32779206 DOI: 10.1002/jper.19-0709] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 05/06/2020] [Accepted: 05/06/2020] [Indexed: 11/06/2022]
Abstract
BACKGROUND This study aimed to determine and compare soft tissue healing outcomes following implant placement in grafted (GG) and non-grafted bone (NGG). METHODS Patients receiving single implant in a tooth-bound maxillary non-molar site were recruited. Clinical healing was documented. Volume and content of wound fluid (WF; at 3, 6, and 9 days) were compared with adjacent gingival crevicular fluid (GCF; at baseline, 1, and 4 months). Buccal flap blood perfusion recovery and changes in bone thickness were recorded. Linear mixed model regression analysis and generalized estimating equations with Bonferroni adjustments were conducted for repeated measures. RESULTS Twenty-five patients (49 ± 4 years; 13 males; nine NGG) completed the study. Soft tissue closure was slower in GG (P < 0.01). Differential response in WF/GCF protein concentrations was detected for ACTH (increased in GG only) and insulin, leptin, osteocalcin (decreased in NGG only) at day 6 (P ≤0.04), with no inter-group differences at any time(P > 0.05). Blood perfusion rate decreased immediately postoperatively (P < 0.01, GG) followed by 3-day hyperemia (P > 0.05 both groups). The recovery to baseline values was almost complete for NGG whereas GG stayed ischemic even at 4 months (P = 0.05). Buccal bone thickness changes were significant in GG sites (P ≤ 0.05). CONCLUSION History of bone grafting alters the clinical, physiological, and molecular healing response of overlying soft tissues after implant placement surgery.
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Affiliation(s)
- Vrisiis Kofina
- Division of Periodontology, College of Dentistry, Ohio State University, Columbus, Ohio, USA
| | - Mutlu Demirer
- Department of Radiology, College of Medicine, Ohio State University, Columbus, Ohio, USA
| | - Barbaros S Erdal
- Department of Radiology, College of Medicine, Ohio State University, Columbus, Ohio, USA
| | - Timothy D Eubank
- Department of Microbiology, Immunology, & Cell Biology, College of Medicine, West Virginia University, Morgantown, West Virginia, USA
| | - Vedat O Yildiz
- Department of Biomedical Informatics, Center for Biostatistics, Ohio State University, Columbus, Ohio, USA
| | - Dimitris N Tatakis
- Division of Periodontology, College of Dentistry, Ohio State University, Columbus, Ohio, USA
| | - Binnaz Leblebicioglu
- Division of Periodontology, College of Dentistry, Ohio State University, Columbus, Ohio, USA
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22
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Sanzhaeva U, Poncelet M, Tseytlin O, Tseytlin M, Gencheva M, Eubank TD, Khramtsov VV, Driesschaert B. Synthesis, Characterization, and Application of a Highly Hydrophilic Triarylmethyl Radical for Biomedical EPR. J Org Chem 2020; 85:10388-10398. [PMID: 32698583 DOI: 10.1021/acs.joc.0c00557] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Stable tetrathiatriarylmethyl radicals have significantly contributed to the recent progress in biomedical electron paramagnetic resonance (EPR) due to their unmatched stability in biological media and long relaxation times. However, the lipophilic core of the most commonly used structure (Finland trityl) is responsible for its interaction with plasma biomacromolecules, such as albumin, and self-aggregation at high concentrations and/or low pH. While Finland trityl is generally considered inert toward many reactive radical species, we report that sulfite anion radical efficiently substitutes the three carboxyl moieties of Finland trityl with a high rate constant of 3.53 × 108 M-1 s-1, leading to a trisulfonated Finland trityl radical. This newly synthesized highly hydrophilic trityl radical shows an ultranarrow linewidth (ΔBpp = 24 mG), a lower affinity for albumin than Finland trityl, and a high aqueous solubility even at acidic pH. Therefore, this new tetrathiatriarylmethyl radical can be considered as a superior spin probe in comparison to the widely used Finland trityl. One of its potential applications was demonstrated by in vivo mapping oxygen in a mouse model of breast cancer. Moreover, we showed that one of the three sulfo groups can be easily substituted with S-, N-, and P-nucleophiles, opening access to various monofunctionalized sulfonated trityl radicals.
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Affiliation(s)
- Urikhan Sanzhaeva
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, West Virginia 26506, United States.,Department of Biochemistry, West Virginia University, School of Medicine, Morgantown, West Virginia 26506, United States
| | - Martin Poncelet
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, West Virginia 26506, United States.,Department of Pharmaceutical Sciences, West Virginia University, School of Pharmacy, Morgantown, West Virginia 26506, United States
| | - Oxana Tseytlin
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, West Virginia 26506, United States.,Department of Biochemistry, West Virginia University, School of Medicine, Morgantown, West Virginia 26506, United States
| | - Mark Tseytlin
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, West Virginia 26506, United States.,Department of Biochemistry, West Virginia University, School of Medicine, Morgantown, West Virginia 26506, United States
| | - Marieta Gencheva
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, West Virginia 26506, United States.,Department of Microbiology, Immunology, and Cell Biology, West Virginia University, School of Medicine, Morgantown, West Virginia 26506, United States
| | - Timothy D Eubank
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, West Virginia 26506, United States.,Department of Microbiology, Immunology, and Cell Biology, West Virginia University, School of Medicine, Morgantown, West Virginia 26506, United States
| | - Valery V Khramtsov
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, West Virginia 26506, United States.,Department of Biochemistry, West Virginia University, School of Medicine, Morgantown, West Virginia 26506, United States
| | - Benoit Driesschaert
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, West Virginia 26506, United States.,Department of Pharmaceutical Sciences, West Virginia University, School of Pharmacy, Morgantown, West Virginia 26506, United States
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23
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Steinberger KJ, Bailey MT, Gross AC, Sumner LA, Voorhees JL, Crouser N, Curry JM, Wang Y, DeVries AC, Marsh CB, Glaser R, Yang EV, Eubank TD. Stress-induced Norepinephrine Downregulates CCL2 in Macrophages to Suppress Tumor Growth in a Model of Malignant Melanoma. Cancer Prev Res (Phila) 2020; 13:747-760. [PMID: 32518084 DOI: 10.1158/1940-6207.capr-19-0370] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 04/06/2020] [Accepted: 06/03/2020] [Indexed: 11/16/2022]
Abstract
Psychological stressors have been implicated in the progression of various tumor types. We investigated a role for stress in tumor immune cell chemotaxis in the B16F10 mouse model of malignant melanoma. We exposed female mice to 6-hour periods of restraint stress (RST) for 7 days, then implanted B16F10 malignant melanoma tumor cells and continued the RST paradigm for 14 additional days. We determined serum corticosterone and liver catecholamine concentrations in these mice. To evaluate the tumor microenvironment, we performed IHC and examined cytokine expression profiles using ELISA-based analysis of tumor homogenates. We found that tumors in mice subjected to RST grew significantly slower, had reduced tumor C-C motif ligand 2 (CCL2), and contained fewer F4/80-positive macrophages than tumors from unstressed mice. We observed a concomitant increase in norepinephrine among the RST mice. An in vitro assay confirmed that norepinephrine downregulates CCL2 production in both mouse and human macrophages, and that pretreatment with the pan-β-adrenergic receptor inhibitor nadolol rescues this activity. Furthermore, RST had no effect on tumor growth in transgenic CCL2-deficient mice. This study suggests that stress reduces malignant melanoma by reducing recruitment of tumor-promoting macrophages by CCL2.
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Affiliation(s)
- Kayla J Steinberger
- Department of Microbiology, Immunology, and Cell Biology, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, West Virginia.,Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, West Virginia
| | - Michael T Bailey
- Section of Oral Biology, The Ohio State University, Columbus, Ohio.,Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio
| | - Amy C Gross
- Division of Pulmonary Medicine, Allergy, Critical Care and Sleep Medicine, The Ohio State University, Columbus, Ohio
| | - Laura A Sumner
- Division of Pulmonary Medicine, Allergy, Critical Care and Sleep Medicine, The Ohio State University, Columbus, Ohio
| | - Jeffrey L Voorhees
- Division of Pulmonary Medicine, Allergy, Critical Care and Sleep Medicine, The Ohio State University, Columbus, Ohio
| | - Nisha Crouser
- Division of Pulmonary Medicine, Allergy, Critical Care and Sleep Medicine, The Ohio State University, Columbus, Ohio
| | - Jennifer M Curry
- Division of Pulmonary Medicine, Allergy, Critical Care and Sleep Medicine, The Ohio State University, Columbus, Ohio
| | - Yijie Wang
- Division of Pulmonary Medicine, Allergy, Critical Care and Sleep Medicine, The Ohio State University, Columbus, Ohio
| | - A Courtney DeVries
- West Virginia University Cancer Institute, Morgantown, West Virginia.,Departments of Medicine & Neuroscience, Rockefeller Neuroscience Institute, West Virginia University, Morgantown, West Virginia
| | - Clay B Marsh
- Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, West Virginia
| | | | - Eric V Yang
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio. .,Department of Molecular Virology, Immunology and Medical Genetics, The Ohio State University Medical Center, Columbus, Ohio
| | - Timothy D Eubank
- Department of Microbiology, Immunology, and Cell Biology, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, West Virginia. .,West Virginia University Cancer Institute, Morgantown, West Virginia
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Poblete JMS, Ballinger MN, Bao S, Alghothani M, Nevado JB, Eubank TD, Christman JW, Magalang UJ. Macrophage HIF-1α mediates obesity-related adipose tissue dysfunction via interleukin-1 receptor-associated kinase M. Am J Physiol Endocrinol Metab 2020; 318:E689-E700. [PMID: 32154744 PMCID: PMC7717118 DOI: 10.1152/ajpendo.00174.2019] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Hypoxia leading to stabilization of hypoxia-inducible factor 1α (HIF-1α) serves as an early upstream initiator for adipose tissue (AT) dysfunction. Monocyte-derived macrophage infiltration in AT contributes to inflammation, fibrosis and obesity-related metabolic dysfunction. It was previously reported that myeloid cell-specific deletion of Hif-1α protected against high-fat diet (HFD)-induced AT dysfunction. Prolyl hydroxylases (PHDs) are key regulators of HIF-1α. We examined the effects of myeloid cell-specific upregulation and stabilization of Hif-1α via deletion of prolyl-hydroxylase 2 (Phd2) and whether interleukin-1 receptor associated kinase-M (Irak-M), a known downstream target of Hif-1α, contributes to Hif-1α-induced AT dysfunction. Our data show that with HFD, Hif-1α and Irak-M expressions were increased in the AT macrophages of Phd2flox/flox/LysMcre mice compared with LysMcre mice. With HFD, Phd2flox/flox/LysMcre mice exhibited increased AT inflammation, fibrosis, and systemic insulin resistance compared with control mice. Furthermore, Phd2flox/flox/LysMcre mice bone marrow-derived macrophages exposed to hypoxia in vitro also had increased expressions of both Hif-1α and Irak-M. In wild-type mice, HFD induced upregulation of both HIF-1a and Irak-M in adipose tissue. Despite equivalent expression of Hif-1α compared with wild-type mice, globally-deficient Irak-M mice fed a HFD exhibited less macrophage infiltration, decreased inflammation and fibrosis and improved glucose tolerance. Global Irak-M deficiency was associated with an alternatively-activated macrophage phenotype in the AT after HFD. Together, these data show for the first time that an Irak-M-dependent mechanism likely mediates obesity-related AT dysfunction in conjunction with Hif-1α upregulation.
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Affiliation(s)
- Josept Mari S Poblete
- Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio
- College of Medicine, University of the Philippines Manila, Manila, Philippines
- Division of Pulmonary, Critical Care and Sleep Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Megan N Ballinger
- Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio
- Division of Pulmonary, Critical Care and Sleep Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Shengying Bao
- Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio
- Division of Pulmonary, Critical Care and Sleep Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Miriam Alghothani
- Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio
- Division of Pulmonary, Critical Care and Sleep Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Jose B Nevado
- College of Medicine, University of the Philippines Manila, Manila, Philippines
| | - Timothy D Eubank
- Department of Microbiology, Immunology, & Cell Biology, West Virginia University, Morgantown, West Virginia
| | - John W Christman
- Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio
- Division of Pulmonary, Critical Care and Sleep Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Ulysses J Magalang
- Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio
- Division of Pulmonary, Critical Care and Sleep Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio
- Department of Neuroscience, The Ohio State University Wexner Medical Center, Columbus, Ohio
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Abstract
Clinical parameters available to evaluate early healing phases of bone regeneration procedures are limited. This study explores wound fluid (WF) content for molecular markers to differentiate wound healing responses in the early postoperative period after bone graft placement. Fifteen patients (50 ± 5 years old; 8 men) scheduled to receive tooth extraction and bone graft placement at maxillary nonmolar single-tooth sites were recruited. Primary wound closure was not intended at time of surgery. Gingival crevicular fluid from adjacent teeth or WF from surgical wound edges were collected (30 seconds) at baseline, at 3, 6, and 9 days, and at 1 and 4 months. Multiplex protein assay was used to determine concentration of various wound healing mediators. Immediately after surgery, 87% of surgical sites exhibited open wound. At day 9, mean wound exposure was 4.8 ± 0.4 mm. At 1 month, all wounds were clinically closed. The WF tripled in volume at day 3 and day 6 (P ≤ .05), compared with baseline gingival crevicular fluid, and gradually decreased as wounds closed. The WF concentrations of interleukin (IL)-6, placental growth factor, plasminogen activator inhibitor 1, insulin-like growth factor binding protein 1, and soluble cluster determinant 40 ligand were increased during early healing days, generally with peak concentration at day 6 (P ≤ .004). Conversely, WF concentrations of IL-18 and epidermal growth factor were decreased after surgery, generally not reaching baseline values until wound closure (P ≤ .008). In general, WF cytokine expression kinetics were concordant with wound closure dynamics (P ≤ .04). These results suggest that WF molecular markers such as IL-6, and to a lesser extent placental growth factor and IL-18, might help differentiate wound healing responses after bone regeneration procedures.
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Affiliation(s)
- Binnaz Leblebicioglu
- Division of Periodontology, College of Dentistry, The Ohio State University, Columbus, Ohio
| | - Lamees Alssum
- Department of Periodontics & Community Dentistry, College of Dentistry, King Saud University, Saudi Arabia; previously with The Ohio State University, Columbus, Ohio
| | - Timothy D Eubank
- Department of Microbiology, Immunology and Cell Biology, School of Medicine, West Virginia University, Mogantown, WV
| | - Vedat O Yildiz
- Center for Biostatistics, College of Medicine, The Ohio State University, Columbus, Ohio
| | - Dimitris N Tatakis
- Division of Periodontology, College of Dentistry, The Ohio State University, Columbus, Ohio
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Dakhlallah D, Wang Y, Bobo TA, Ellis E, Mo X, Piper MG, Eubank TD, Marsh CB. Constitutive AKT Activity Predisposes Lung Fibrosis by Regulating Macrophage, Myofibroblast and Fibrocyte Recruitment and Changes in Autophagy. ACTA ACUST UNITED AC 2019; 10:346-373. [PMID: 31750010 PMCID: PMC6866236 DOI: 10.4236/abb.2019.1010027] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The etiology and pathogenesis of pulmonary fibrosis is poorly understood. We and others reported that M-CSF/CSF-1, M-CSF-R and downstream AKT activation plays an important role in lung fibrosis in mice models and in IPF patients. To understand potential molecular pathways used by M-CSF-R activation to direct lung fibrosis, we used a novel transgenic mouse model that expresses a constitutively-active form of AKT, myristoylated AKT (Myr-Akt), driven by the c-fms (M-CSF-R) promoter. We were particularly interested in the basal immune state of the lungs of these Myr-Akt mice to assess M-CSF-R-related priming for lung fibrosis. In support of a priming effect, macrophages isolated from the lungs of unchallenged Myr-Akt mice displayed an M2-tropism, enhanced co-expression of M-CSF-R and α-SMA, reduced autophagy reflected by reduced expression of the key autophagy genes Beclin-1, MAP1-Lc3a(Lc3a), and MAP1-Lc3b(Lc3b), and increased p62/STSQM1 expression compared with littermate WT mice. Furthermore, Myr-Akt mice had more basal circulating fibrocytes than WT mice. Lastly, upon bleomycin challenge, Myr-Akt mice showed enhanced collagen deposition, increased F4/80+ and CD45+ cells, reduced autophagy genes Beclin-1, Lc3a, and Lc3b expression, and a shorter life-span than WT littermates. These data provide support that M-CSF-R/AKT activation may have a priming effect which can predispose lung tissue to pulmonary fibrosis.
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Affiliation(s)
- Duaa Dakhlallah
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, USA.,Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, USA
| | - Yijie Wang
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, USA
| | - Tierra A Bobo
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, USA.,Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, USA
| | - Emily Ellis
- Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, USA
| | - Xiaokui Mo
- The Center for Biostatistics, The Ohio State University, Columbus, OH, USA
| | - Melissa G Piper
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, USA
| | - Timothy D Eubank
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, USA.,Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, USA.,Department of Microbiology, Immunology and Cell Biology, West Virginia University, Morgantown, WV, USA
| | - Clay B Marsh
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, USA.,Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, USA
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Tseytlin O, Guggilapu P, Bobko AA, AlAhmad H, Xu X, Epel B, O'Connell R, Hoblitzell EH, Eubank TD, Khramtsov VV, Driesschaert B, Kazkaz E, Tseytlin M. Modular imaging system: Rapid scan EPR at 800 MHz. J Magn Reson 2019; 305:94-103. [PMID: 31238278 PMCID: PMC6656609 DOI: 10.1016/j.jmr.2019.06.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 06/04/2019] [Accepted: 06/05/2019] [Indexed: 06/05/2023]
Abstract
An electron paramagnetic resonance (EPR) imaging system has been custom built for use in pre-clinical and, potentially, clinical studies. Commercial standalone modules have been used in the design that are MATLAB-controlled. The imaging system combines digital and analog technologies. It was designed to achieve maximum flexibility and versatility and to perform standard and novel user-defined experiments. This design goal is achieved by frequency mixing of an arbitrary waveform generator (AWG) output at the intermediate frequency (IF) with a constant source frequency (SF). Low noise SF at 250, 750, and 1000 MHz are available in the system. A wide range of frequencies from near-baseband to L-band can be generated as a result. Two-stage downconversion at the signal detection side is implemented that enables multi-frequency EPR capability. In the first stage, the signal frequency is converted to IF. A novel AWG-enabled digital auto-frequency control method that operates at IF is described that is used for automatic resonator tuning. Quadrature baseband EPR signal is generated in the second downconversion step. The semi-digital approach of mixing low-noise frequency sources with an AWG permits generation of arbitrary excitation patterns that include but are not limited to frequency sweeps for resonator tuning and matching, continuous-wave, and pulse sequences. Presented in this paper is the demonstration of rapid scan (RS) EPR imaging implemented at 800 MHz. Generation of stable magnetic scan waveforms is critical for the RS method. A digital automatic scan control (DASC) system was developed for sinusoidal magnetic field scans. DASC permits tight control of both amplitude and phase of the scans. A surface loop resonator was developed using 3D printing technology. RS EPR imaging system was validated using sample phantoms. In vivo imaging of a breast cancer mouse model is demonstrated.
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Affiliation(s)
- Oxana Tseytlin
- Biochemistry Department, West Virginia University, Morgantown, WV 26506, USA; In Vivo Multifunctional Magnetic Resonance Center at Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA
| | - Priyaankadevi Guggilapu
- Biochemistry Department, West Virginia University, Morgantown, WV 26506, USA; Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, WV 26506, USA; In Vivo Multifunctional Magnetic Resonance Center at Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA
| | - Andrey A Bobko
- Biochemistry Department, West Virginia University, Morgantown, WV 26506, USA; In Vivo Multifunctional Magnetic Resonance Center at Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA
| | - Hussien AlAhmad
- Biochemistry Department, West Virginia University, Morgantown, WV 26506, USA; In Vivo Multifunctional Magnetic Resonance Center at Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA; Department of Industrial & Management Systems Engineering, West Virginia University, Morgantown, WV 26506, USA
| | - Xuan Xu
- Biochemistry Department, West Virginia University, Morgantown, WV 26506, USA; Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, WV 26506, USA; In Vivo Multifunctional Magnetic Resonance Center at Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA
| | - Boris Epel
- Center for EPR Imaging In Vivo Physiology, University of Chicago, IL 60637, USA
| | - Ryan O'Connell
- Biochemistry Department, West Virginia University, Morgantown, WV 26506, USA; In Vivo Multifunctional Magnetic Resonance Center at Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA
| | - Emily H Hoblitzell
- In Vivo Multifunctional Magnetic Resonance Center at Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA; Department of Microbiology, Immunology & Cell Biology, West Virginia University School of Medicine, Morgantown, WV 26506, USA
| | - Timothy D Eubank
- In Vivo Multifunctional Magnetic Resonance Center at Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA; Department of Microbiology, Immunology & Cell Biology, West Virginia University School of Medicine, Morgantown, WV 26506, USA
| | - Valery V Khramtsov
- Biochemistry Department, West Virginia University, Morgantown, WV 26506, USA; In Vivo Multifunctional Magnetic Resonance Center at Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA
| | - Benoit Driesschaert
- In Vivo Multifunctional Magnetic Resonance Center at Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA; Department of Pharmaceutical Sciences, West Virginia University, Morgantown, WV 26506, USA
| | - Eiad Kazkaz
- Biochemistry Department, West Virginia University, Morgantown, WV 26506, USA; Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, WV 26506, USA; In Vivo Multifunctional Magnetic Resonance Center at Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA
| | - Mark Tseytlin
- Biochemistry Department, West Virginia University, Morgantown, WV 26506, USA; In Vivo Multifunctional Magnetic Resonance Center at Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA.
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28
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Gorodetskii AA, Eubank TD, Driesschaert B, Poncelet M, Ellis E, Khramtsov VV, Bobko AA. Oxygen-induced leakage of spin polarization in Overhauser-enhanced magnetic resonance imaging: Application for oximetry in tumors. J Magn Reson 2018; 297:42-50. [PMID: 30359906 PMCID: PMC6289650 DOI: 10.1016/j.jmr.2018.10.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 10/03/2018] [Accepted: 10/09/2018] [Indexed: 06/08/2023]
Abstract
Overhauser-enhanced Magnetic Resonance Imaging (OMRI) is a double resonance technique applied for oxygen imaging in aqueous samples and biological tissues. In this report, we present an improved OMRI approach of oxygen measurement using the single line "Finland" trityl spin probe. Compared to a traditional approach, we introduced an additional mechanism of leakage of spin polarization due to an interaction of a spin system with oxygen. The experimental comparison of the new approach with an oxygen-dependent leakage factor to a traditional approach performed in phantom samples in vitro, and mouse tumor model in vivo, shows improved accuracy of determination of oxygen and contrast agent concentrations.
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Affiliation(s)
- Artem A Gorodetskii
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA; Department of Biochemistry, West Virginia University, School of Medicine, Morgantown, WV 26506, USA; N.N. Voroztsov Novosibirsk Institute of Organic Chemistry SB RAS, Novosibirsk 630090, Russia; Novosibirsk State University, Novosibirsk 630090, Russia
| | - Timothy D Eubank
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA; Department of Microbiology, Immunology & Cell Biology, West Virginia University, School of Medicine, Morgantown, WV 26506, USA; West Virginia University Cancer Institute, Morgantown, WV 26506, USA
| | - Benoit Driesschaert
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA; Department of Pharmaceutical Sciences, West Virginia University, School of Pharmacy, Morgantown, WV 26506, USA; West Virginia University Cancer Institute, Morgantown, WV 26506, USA
| | - Martin Poncelet
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA; Department of Biochemistry, West Virginia University, School of Medicine, Morgantown, WV 26506, USA
| | - Emily Ellis
- Department of Microbiology, Immunology & Cell Biology, West Virginia University, School of Medicine, Morgantown, WV 26506, USA
| | - Valery V Khramtsov
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA; Department of Biochemistry, West Virginia University, School of Medicine, Morgantown, WV 26506, USA; West Virginia University Cancer Institute, Morgantown, WV 26506, USA.
| | - Andrey A Bobko
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV 26506, USA; Department of Biochemistry, West Virginia University, School of Medicine, Morgantown, WV 26506, USA; West Virginia University Cancer Institute, Morgantown, WV 26506, USA.
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Steinberger KJ, Forget M, Mo X, Evans R, Gross A, Moldovan L, Bobko A, Khramstov V, Marsh CB, Eubank TD. Abstract 5207: HIF-1α regulates the Tie2 receptor on Tie2-expressing monocytes in PyMT breast tumors and augments angiogenic function and metastatic potential. Cancer Res 2018. [DOI: 10.1158/1538-7445.am2018-5207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Tissue oxygenation in the tumor microenvironment serves as a significant parameter in tumor pathophysiology. In fact, normalization of tumor oxygen is associated with inhibition of tumor growth and metastatic capacity. Irregular tumor vessels produced during tumor angiogenesis have low blood perfusion; thus, oxygen transport is decreased in tumors. Tie2-expressing monocytes (TEMs) are a distinct subset of proangiogenic monocytes selectively recruited to tumors in breast cancer patients. Due to the hypoxic nature of the tumor microenvironment, we investigated if oxygen regulates the trafficking of these cells into tumors or if oxygen regulates monocyte differentiation into TEMs once inside the tumor proper. To understand the differentiation of F4/80+/Tie2- cells to Tie2-positivity, we orthotopically implanted PyMT breast tumor cells containing particulate lithium octa-n-butoxy-naphthalocyanine (LiNcBuO) into the mammary fat pads of LysM-Cre control and HIF-1αfl/fl/LysM-Cre mice and evaluated tissue oxygenation by electron paramagnetic resonance (EPR), TEM infiltration, tumor angiogenesis, and metastatic potential. Longitudinal monitoring of physiologic oxygen in tumors using EPR demonstrates the significant role of oxygen-driven TEM regulation in tumor angiogenesis and progression.
Citation Format: Kayla J. Steinberger, Mary Forget, Xiaokui Mo, Randall Evans, Amy Gross, Leni Moldovan, Andrey Bobko, Valery Khramstov, Clay B. Marsh, Timothy D. Eubank. HIF-1α regulates the Tie2 receptor on Tie2-expressing monocytes in PyMT breast tumors and augments angiogenic function and metastatic potential [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 5207.
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Affiliation(s)
| | | | - Xiaokui Mo
- 2The Ohio State University, Columbus, OH
| | | | - Amy Gross
- 2The Ohio State University, Columbus, OH
| | | | - Andrey Bobko
- 1West Virginia University School of Medicine, Morgantown, WV
| | | | - Clay B. Marsh
- 1West Virginia University School of Medicine, Morgantown, WV
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Bobko AA, Eubank TD, Driesschaert B, Khramtsov VV. In Vivo EPR Assessment of pH, pO2, Redox Status, and Concentrations of Phosphate and Glutathione in the Tumor Microenvironment. J Vis Exp 2018. [PMID: 29608148 DOI: 10.3791/56624] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
This protocol demonstrates the capability of low-field electron paramagnetic resonance (EPR)-based techniques in combination with functional paramagnetic probes to provide quantitative information on the chemical tumor microenvironment (TME), including pO2, pH, redox status, concentrations of interstitial inorganic phosphate (Pi), and intracellular glutathione (GSH). In particular, an application of a recently developed soluble multifunctional trityl probe provides unsurpassed opportunity for in vivo concurrent measurements of pH, pO2 and Pi in Extracellular space (HOPE probe). The measurements of three parameters using a single probe allow for their correlation analyses independent of probe distribution and time of the measurements.
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Affiliation(s)
- Andrey A Bobko
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University; Department of Biochemistry, West Virginia University School of Medicine
| | - Timothy D Eubank
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University; Department of Microbiology, Immunology & Cell Biology, West Virginia University School of Medicine
| | - Benoit Driesschaert
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University; Department of Biochemistry, West Virginia University School of Medicine
| | - Valery V Khramtsov
- In Vivo Multifunctional Magnetic Resonance center, Robert C. Byrd Health Sciences Center, West Virginia University; Department of Biochemistry, West Virginia University School of Medicine;
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Alssum L, Eubank TD, Roy S, Erdal BS, Yildiz VO, Tatakis DN, Leblebicioglu B. Gingival Perfusion and Tissue Biomarkers During Early Healing of Postextraction Regenerative Procedures: A Prospective Case Series. J Periodontol 2017. [PMID: 28644107 DOI: 10.1902/jop.2017.170117] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Postextraction alveolar bone loss, mostly affecting the buccal plate, occurs despite regenerative procedures. To better understand possible determinants, this prospective case series assesses gingival blood perfusion and tissue molecular responses in relation to postextraction regenerative outcomes. METHODS Adults scheduled to receive bone grafting in maxillary, non-molar, single-tooth extraction sites were recruited. Clinical documentation included the following: 1) probing depth (PD); 2) keratinized tissue width (KT); 3) tissue biotype (TB); and 4) plaque level. Wound closure was clinically evaluated. Gingival blood perfusion was measured by laser Doppler flowmetry (LDF). Wound fluid (WF) and gingival biopsies were analyzed for protein levels and gene expression, respectively, of relevant molecular markers. Bone healing outcomes were determined radiographically (cone-beam computed tomography). Healing was followed for 4 months. RESULTS Data from 15 patients are reported. Postoperatively, neither complications nor changes in PD, KT, or TB were observed. LDF revealed decreased perfusion followed by hyperemia that persisted for 1 month (P ≤0.05). WF levels of angiopoietin-2, interleukin-8 (IL-8), tumor necrosis factor-alpha (TNF-α), and vascular endothelial growth factor peaked on day 6 (P ≤0.05) and decreased thereafter. Only IL-8 and TNF-α exhibited increased gene expression. Linear bone changes were negligible. Volumetric bone changes were minimal but statistically significant, with more bone loss when membrane was used (P = 0.05). CONCLUSIONS Gingival blood perfusion after postextraction bone regenerative procedures follows an ischemia-reperfusion model. Transient increases in angiogenic factor levels and prolonged hyperemia characterize the soft tissue response. These soft tissue responses do not determine radiographic bone changes.
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Affiliation(s)
- Lamees Alssum
- Currently, Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia; previously, Division of Periodontology, College of Dentistry, The Ohio State University, Columbus, OH
| | - Timothy D Eubank
- Department of Microbiology, Immunology and Cell Biology; School of Medicine; West Virginia University; Morgantown, WV
| | - Sashwati Roy
- Department of Surgery, College of Medicine, The Ohio State University
| | - Barbaros S Erdal
- Department of Radiology, College of Medicine, The Ohio State University
| | - Vedat O Yildiz
- Department of Biomedical Informatics, Center for Biostatistics, The Ohio State University
| | - Dimitris N Tatakis
- Division of Periodontology, College of Dentistry, The Ohio State University
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Driesschaert B, Bobko AA, Eubank TD, Samouilov A, Khramtsov VV, Zweier JL. Poly-arginine conjugated triarylmethyl radical as intracellular spin label. Bioorg Med Chem Lett 2016; 26:1742-4. [PMID: 26923698 DOI: 10.1016/j.bmcl.2016.02.048] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 02/16/2016] [Accepted: 02/17/2016] [Indexed: 10/22/2022]
Abstract
Stable triarylmethyl radicals are ideal spin labels used for biomedical electron paramagnetic resonance applications. Previously reported structures exhibit polar charged functions for water solubilization preventing them from crossing the cell membrane. We report the synthesis of a triarylmethyl radical conjugated to poly-arginine peptide allowing intracellular delivery of the paramagnetic label.
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Affiliation(s)
- Benoit Driesschaert
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Science Center, West Virginia University, Morgantown, WV 26506, United States; Department of Biochemistry, West Virginia University School of Medicine, Morgantown, WV 26506, United States
| | - Andrey A Bobko
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Science Center, West Virginia University, Morgantown, WV 26506, United States; Department of Biochemistry, West Virginia University School of Medicine, Morgantown, WV 26506, United States
| | - Timothy D Eubank
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Science Center, West Virginia University, Morgantown, WV 26506, United States; Department of Microbiology, Immunology & Cell Biology, West Virginia University School of Medicine, Morgantown, WV 26506, United States
| | - Alexandre Samouilov
- Davis Heart & Lung Research Institute, The Ohio State University/Wexner Medical Center, 460 West 12th Avenue, BRT 0390, Columbus, OH 43210, United States
| | - Valery V Khramtsov
- In Vivo Multifunctional Magnetic Resonance Center, Robert C. Byrd Health Science Center, West Virginia University, Morgantown, WV 26506, United States; Department of Biochemistry, West Virginia University School of Medicine, Morgantown, WV 26506, United States
| | - Jay L Zweier
- Davis Heart & Lung Research Institute, The Ohio State University/Wexner Medical Center, 460 West 12th Avenue, BRT 0390, Columbus, OH 43210, United States.
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Dhimitruka I, Eubank TD, Gross AC, Khramtsov VV. New class of 8-aryl-7-deazaguanine cell permeable fluorescent probes. Bioorg Med Chem Lett 2015; 25:4593-6. [PMID: 26320620 DOI: 10.1016/j.bmcl.2015.08.054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 08/20/2015] [Indexed: 12/15/2022]
Abstract
A one step synthesis of fluorescent 8-aryl-(7-deazaguanines) has been accomplished. Probes exhibit blue to green high quantum yield fluorescence in a variety of organic and aqueous solutions, high extinction coefficients, and large Stokes shifts often above 100 nm. The probes are highly cell permeable, and exhibit stable bright fluorescence once intracellular; therefore are suited to the design of biosensors.
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Affiliation(s)
- Ilirian Dhimitruka
- Dorothy M. Davis Heart & Lung Research Institute, and Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, United States
| | - Timothy D Eubank
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University Health Sciences, Morgantown, VW 26506, United States
| | - Amy C Gross
- Dorothy M. Davis Heart & Lung Research Institute, and Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, United States
| | - Valery V Khramtsov
- Dorothy M. Davis Heart & Lung Research Institute, and Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, United States
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Nam J, Perera P, Gordon R, Jeong YH, Blazek AD, Kim DG, Tee BC, Sun Z, Eubank TD, Zhao Y, Lablebecioglu B, Liu S, Litsky A, Weisleder NL, Lee BS, Butterfield T, Schneyer AL, Agarwal S. Follistatin-like 3 is a mediator of exercise-driven bone formation and strengthening. Bone 2015; 78:62-70. [PMID: 25937185 PMCID: PMC4466155 DOI: 10.1016/j.bone.2015.04.038] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 04/15/2015] [Accepted: 04/24/2015] [Indexed: 11/17/2022]
Abstract
Exercise is vital for maintaining bone strength and architecture. Follistatin-like 3 (FSTL3), a member of follistatin family, is a mechanosensitive protein upregulated in response to exercise and is involved in regulating musculoskeletal health. Here, we investigated the potential role of FSTL3 in exercise-driven bone remodeling. Exercise-dependent regulation of bone structure and functions was compared in mice with global Fstl3 gene deletion (Fstl3-/-) and their age-matched Fstl3+/+ littermates. Mice were exercised by low-intensity treadmill walking. The mechanical properties and mineralization were determined by μCT, three-point bending test and sequential incorporation of calcein and alizarin complexone. ELISA, Western-blot analysis and qRT-PCR were used to analyze the regulation of FSTL3 and associated molecules in the serum specimens and tissues. Daily exercise significantly increased circulating FSTL3 levels in mice, rats and humans. Compared to age-matched littermates, Fstl3-/- mice exhibited significantly lower fracture tolerance, having greater stiffness, but lower strain at fracture and yield energy. Furthermore, increased levels of circulating FSTL3 in young mice paralleled greater strain at fracture compared to the lower levels of FSTL3 in older mice. More significantly, Fstl3-/- mice exhibited loss of mechanosensitivity and irresponsiveness to exercise-dependent bone formation as compared to their Fstl3+/+ littermates. In addition, FSTL3 gene deletion resulted in loss of exercise-dependent sclerostin regulation in osteocytes and osteoblasts, as compared to Fstl3+/+ osteocytes and osteoblasts, in vivo and in vitro. The data identify FSTL3 as a critical mediator of exercise-dependent bone formation and strengthening and point to its potential role in bone health and in musculoskeletal diseases.
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Affiliation(s)
- J Nam
- Department of Bioengineering, University of California, Riverside, CA 92507, USA.
| | - P Perera
- Division of Biosciences, The Ohio State University College of Dentistry, Columbus, OH 43210, USA
| | - R Gordon
- Division of Biosciences, The Ohio State University College of Dentistry, Columbus, OH 43210, USA
| | - Y H Jeong
- Division of Orthodontics, The Ohio State University College of Dentistry, Columbus, OH 43210, USA
| | - A D Blazek
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210, USA
| | - D G Kim
- Division of Orthodontics, The Ohio State University College of Dentistry, Columbus, OH 43210, USA
| | - B C Tee
- Division of Orthodontics, The Ohio State University College of Dentistry, Columbus, OH 43210, USA
| | - Z Sun
- Division of Orthodontics, The Ohio State University College of Dentistry, Columbus, OH 43210, USA
| | - T D Eubank
- Department of Internal Medicine, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| | - Y Zhao
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - B Lablebecioglu
- Division of Periodontics, The Ohio State University College of Dentistry, Columbus, OH 43210, USA
| | - S Liu
- Hormel Institute, University of Minnesota, MN 55901, USA
| | - A Litsky
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH 43210, USA; Department of Orthopedics, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| | - N L Weisleder
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210, USA
| | - B S Lee
- Department of Physiology and Cell Biology, The Ohio State University, Columbus, OH 43210, USA
| | - T Butterfield
- Department of Physiology, University of Kentucky, Lexington, KY 40536, USA
| | - A L Schneyer
- Department of Veterinary and Animal Science, University of Massachusetts-Amherst, MA 01003, USA
| | - S Agarwal
- Division of Biosciences, The Ohio State University College of Dentistry, Columbus, OH 43210, USA; Department of Orthopedics, The Ohio State University College of Medicine, Columbus, OH 43210, USA
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Leddon JL, Chen CY, Currier MA, Wang PY, Jung FA, Denton NL, Cripe KM, Haworth KB, Arnold MA, Gross AC, Eubank TD, Goins WF, Glorioso JC, Cohen JB, Grandi P, Hildeman DA, Cripe TP. Oncolytic HSV virotherapy in murine sarcomas differentially triggers an antitumor T-cell response in the absence of virus permissivity. Mol Ther Oncolytics 2015; 1:14010. [PMID: 27119100 PMCID: PMC4782947 DOI: 10.1038/mto.2014.10] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 10/14/2014] [Indexed: 01/05/2023]
Abstract
Multiple studies have indicated that in addition to direct oncolysis, virotherapy promotes an antitumor cytotoxic T cell response important for efficacy. To study this phenomenon further, we tested three syngeneic murine sarcoma models that displayed varied degrees of permissiveness to oncolytic herpes simplex virus replication and cytotoxicity in vitro, with the most permissive being comparable to some human sarcoma tumor lines. The in vivo antitumor effect ranged from no or modest response to complete tumor regression and protection from tumor rechallenge. The in vitro permissiveness to viral oncolysis was not predictive of the in vivo antitumor effect, as all three tumors showed intact interferon signaling and minimal permissiveness to virus in vivo. Tumor shrinkage was T-cell mediated with a tumor-specific antigen response required for maximal antitumor activity. Further analysis of the innate and adaptive immune microenvironment revealed potential correlates of susceptibility and resistance, including favorable and unfavorable cytokine profiles, differential composition of intratumoral myeloid cells, and baseline differences in tumor cell immunogenicity and tumor-infiltrating T-cell subsets. It is likely that a more complete understanding of the interplay between the immunologic immune microenvironment and virus infection will be necessary to fully leverage the antitumor effects of this therapeutic platform.
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Affiliation(s)
- Jennifer L Leddon
- Center for Childhood Cancer and Blood Diseases, Nationwide Children's Hospital, The Ohio State University, Columbus, Ohio, USA; Medical Scientist Training Program, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio, USA; Immunobiology Graduate Training Program, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio, USA
| | - Chun-Yu Chen
- Center for Childhood Cancer and Blood Diseases, Nationwide Children's Hospital, The Ohio State University , Columbus, Ohio, USA
| | - Mark A Currier
- Center for Childhood Cancer and Blood Diseases, Nationwide Children's Hospital, The Ohio State University , Columbus, Ohio, USA
| | - Pin-Yi Wang
- Center for Childhood Cancer and Blood Diseases, Nationwide Children's Hospital, The Ohio State University , Columbus, Ohio, USA
| | - Francesca A Jung
- Center for Childhood Cancer and Blood Diseases, Nationwide Children's Hospital, The Ohio State University , Columbus, Ohio, USA
| | - Nicholas L Denton
- Center for Childhood Cancer and Blood Diseases, Nationwide Children's Hospital, The Ohio State University , Columbus, Ohio, USA
| | - Kevin M Cripe
- Center for Childhood Cancer and Blood Diseases, Nationwide Children's Hospital, The Ohio State University , Columbus, Ohio, USA
| | - Kellie B Haworth
- Center for Childhood Cancer and Blood Diseases, Nationwide Children's Hospital, The Ohio State University, Columbus, Ohio, USA; Division of Hematology/Oncology/Blood and Marrow Transplantation, Nationwide Children's Hospital, The Ohio State University, Columbus, Ohio, USA
| | - Michael A Arnold
- Department of Pathology and Laboratory Medicine, Nationwide Children's Hospital, The Ohio State University , Columbus, Ohio, USA
| | - Amy C Gross
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, The Ohio State University , Columbus, Ohio, USA
| | - Timothy D Eubank
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, The Ohio State University , Columbus, Ohio, USA
| | - William F Goins
- Department of Microbiology and Molecular Genetics, University of Pittsburgh, School of Medicine , Pittsburgh, Pennsylvania, USA
| | - Joseph C Glorioso
- Department of Microbiology and Molecular Genetics, University of Pittsburgh, School of Medicine , Pittsburgh, Pennsylvania, USA
| | - Justus B Cohen
- Department of Microbiology and Molecular Genetics, University of Pittsburgh, School of Medicine , Pittsburgh, Pennsylvania, USA
| | - Paola Grandi
- Department of Microbiology and Molecular Genetics, University of Pittsburgh, School of Medicine , Pittsburgh, Pennsylvania, USA
| | - David A Hildeman
- Division of Cellular and Molecular Immunology, Cincinnati Children's Hospital Medical Center, University of Cincinnati , Cincinnati, Ohio, USA
| | - Timothy P Cripe
- Center for Childhood Cancer and Blood Diseases, Nationwide Children's Hospital, The Ohio State University, Columbus, Ohio, USA; Division of Hematology/Oncology/Blood and Marrow Transplantation, Nationwide Children's Hospital, The Ohio State University, Columbus, Ohio, USA
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Chen D, Bobko AA, Gross AC, Evans R, Marsh CB, Khramtsov VV, Eubank TD, Friedman A. Involvement of tumor macrophage HIFs in chemotherapy effectiveness: mathematical modeling of oxygen, pH, and glutathione. PLoS One 2014; 9:e107511. [PMID: 25295611 PMCID: PMC4189793 DOI: 10.1371/journal.pone.0107511] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 08/12/2014] [Indexed: 12/17/2022] Open
Abstract
The four variables, hypoxia, acidity, high glutathione (GSH) concentration and fast reducing rate (redox) are distinct and varied characteristics of solid tumors compared to normal tissue. These parameters are among the most significant factors underlying the metabolism and physiology of solid tumors, regardless of their type or origin. Low oxygen tension contributes to both inhibition of cancer cell proliferation and therapeutic resistance of tumors; low extracellular pH, the reverse of normal cells, mainly enhances tumor invasion; and dysregulated GSH and redox potential within cancer cells favor their proliferation. In fact, cancer cells under these microenvironmental conditions appreciably alter tumor response to cytotoxic anti-cancer treatments. Recent experiments measured the in vivo longitudinal data of these four parameters with tumor development and the corresponding presence and absence of tumor macrophage HIF-1α or HIF-2α in a mouse model of breast cancer. In the current paper, we present a mathematical model-based system of (ordinary and partial) differential equations to monitor tumor growth and susceptibility to standard chemotherapy with oxygen level, pH, and intracellular GSH concentration. We first show that our model simulations agree with the corresponding experiments, and then we use our model to suggest treatments of tumors by altering these four parameters in tumor microenvironment. For example, the model qualitatively predicts that GSH depletion can raise the level of reactive oxygen species (ROS) above a toxic threshold and result in inhibition of tumor growth.
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Affiliation(s)
- Duan Chen
- Department of Mathematics and Statistics, University of North Carolina at Charlotte, Charlotte, North Carolina, United States of America
| | - Andrey A. Bobko
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, College of Medicine, The Ohio State University, Columbus, Ohio, United States of America
| | - Amy C. Gross
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, College of Medicine, The Ohio State University, Columbus, Ohio, United States of America
| | - Randall Evans
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, College of Medicine, The Ohio State University, Columbus, Ohio, United States of America
| | - Clay B. Marsh
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, College of Medicine, The Ohio State University, Columbus, Ohio, United States of America
| | - Valery V. Khramtsov
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, College of Medicine, The Ohio State University, Columbus, Ohio, United States of America
| | - Timothy D. Eubank
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, College of Medicine, The Ohio State University, Columbus, Ohio, United States of America
| | - Avner Friedman
- Mathematical Biosciences Institute, The Ohio State University, Columbus, Ohio, United States of America
- Department of Mathematics, The Ohio State University, Columbus, Ohio, United States of America
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Martin-Vaquero P, da Costa RC, Moore SA, Gross AC, Eubank TD. Cytokine concentrations in the cerebrospinal fluid of great danes with cervical spondylomyelopathy. J Vet Intern Med 2014; 28:1268-74. [PMID: 24965833 PMCID: PMC4169188 DOI: 10.1111/jvim.12388] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 03/27/2014] [Accepted: 04/30/2014] [Indexed: 11/28/2022] Open
Abstract
Background Chronic inflammation is involved in the pathogenesis of human cervical spondylotic myelopathy and could also play a role in cervical spondylomyelopathy (CSM) in dogs. Hypothesis/Objectives That cerebrospinal fluid (CSF) cytokine concentrations would differ between clinically normal (control) and CSM‐affected Great Danes (GDs), with affected GDs showing higher levels of inflammatory cytokines, such as interleukin (IL)‐6 and monocyte chemoattractant protein‐1/chemokine ligand 2 (MCP‐1/CCL2). Animals Client‐owned GDs: 15 control, 15 CSM‐affected. Methods Prospective study. Dogs underwent cervical vertebral column magnetic resonance imaging and collection of CSF from the cerebellomedullary cistern. Cytokine concentrations were measured using a commercially available canine multiplex immunoassay. Cytokine concentrations were compared between groups. Associations with the administration of anti‐inflammatory medications, disease duration and severity, severity of spinal cord (SC) compression, and SC signal changes were investigated in affected GDs. Results Affected GDs had significantly lower MCP‐1/CCL2 (mean 138.03 pg/mL, 95% confidence interval [CI] = 114.85–161.20) than control GDs (212.89 pg/mL, 95% CI = 165.68–260.11, P = .028). In affected GDs, MCP‐1/CCL2 concentrations correlated inversely with the severity of SC compression. There were no associations with administration of anti‐inflammatory medications, disease duration, or disease severity. IL‐6 concentrations were significantly higher (2.20 pg/mL, 95% CI = 1.92–2.47, P < .001) in GDs with SC signal changes. Conclusions and Clinical Importance Lower MCP‐1/CCL2 in CSM‐affected GDs might compromise clearance of axonal and myelin debris, delay axon regeneration, and affect recovery. Higher IL‐6 in CSM‐affected GDs with SC signal changes suggests more severe inflammation in this group.
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Affiliation(s)
- P Martin-Vaquero
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University , Columbus, OH
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Samouilov A, Efimova OV, Bobko AA, Sun Z, Petryakov S, Eubank TD, Trofimov DG, Kirilyuk IA, Grigor'ev IA, Takahashi W, Zweier JL, Khramtsov VV. In vivo proton-electron double-resonance imaging of extracellular tumor pH using an advanced nitroxide probe. Anal Chem 2014; 86:1045-52. [PMID: 24372284 DOI: 10.1021/ac402230h] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A variable radio frequency proton-electron double-resonance imaging (VRF PEDRI) approach for pH mapping of aqueous samples has been recently developed (Efimova et al. J. Magn. Reson. 2011, 209, 227-232). A pH map is extracted from two PEDRI acquisitions performed at electron paramagnetic resonance (EPR) frequencies of protonated and unprotonated forms of a pH-sensitive probe. To translate VRF PEDRI to an in vivo setting, an advanced pH probe was synthesized. Probe deuteration resulted in a narrow spectral line of 1.2 G compared to a nondeuterated analogue line width of 2.1 G allowing for an increase of Overhauser enhancements and reduction in rf power deposition. Binding of the probe to the cell-impermeable tripeptide, glutathione (GSH), allows for targeting to extracellular tissue space for monitoring extracellular tumor acidosis, a prognostic factor in tumor pathophysiology. The probe demonstrated pH sensitivity in the 5.8-7.8 range, optimum for measurement of acidic extracellular tumor pH (pH(e)). In vivo VRF PEDRI was performed on Met-1 tumor-bearing mice. Compared to normal mammary glands with a neutral mean pH(e) (7.1 ± 0.1), we observed broader pH distribution with acidic mean pH(e) (6.8 ± 0.1) in tumor tissue. In summary, VRF PEDRI in combination with a newly developed pH probe provides an analytical approach for spatially resolved noninvasive pHe monitoring, in vivo.
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Affiliation(s)
- Alexandre Samouilov
- The Dorothy M. Davis Heart and Lung Research Institute: ‡Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, and §Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University , Columbus, Ohio 43210, United States
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Voorhees JL, Powell ND, Moldovan L, Mo X, Eubank TD, Marsh CB. Chronic restraint stress upregulates erythropoiesis through glucocorticoid stimulation. PLoS One 2013; 8:e77935. [PMID: 24205034 PMCID: PMC3799740 DOI: 10.1371/journal.pone.0077935] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Accepted: 09/05/2013] [Indexed: 12/22/2022] Open
Abstract
In response to elevated glucocorticoid levels, erythroid progenitors rapidly expand to produce large numbers of young erythrocytes. Previous work demonstrates hematopoietic changes in rodents exposed to various physical and psychological stressors, however, the effects of chronic psychological stress on erythropoiesis has not be delineated. We employed laboratory, clinical and genomic analyses of a murine model of chronic restraint stress (RST) to examine the influence of psychological stress on erythropoiesis. Mice exposed to RST demonstrated markers of early erythroid expansion involving the glucocorticoid receptor. In addition, these RST-exposed mice had increased numbers of circulating reticulocytes and increased erythropoiesis in primary and secondary erythroid tissues. Mice also showed increases in erythroid progenitor populations and elevated expression of the erythroid transcription factor KLF1 in these cells. Together this work reports some of the first evidence of psychological stress affecting erythroid homeostasis through glucocorticoid stimulation.
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Affiliation(s)
- Jeffrey L. Voorhees
- The Dorothy M. Davis Heart and Lung Research Institute, Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, Ohio, United States of America
- Department of Internal Medicine, The Ohio State University, Columbus, Ohio, United States of America
| | - Nicole D. Powell
- Section of Oral Biology, College of Dentistry, The Ohio State University, Columbus, Ohio, United States of America
| | - Leni Moldovan
- The Dorothy M. Davis Heart and Lung Research Institute, Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, Ohio, United States of America
- Department of Internal Medicine, The Ohio State University, Columbus, Ohio, United States of America
| | - Xiaokui Mo
- Center for Biostatistics, The Ohio State University, Columbus, Ohio, United States of America
| | - Timothy D. Eubank
- The Dorothy M. Davis Heart and Lung Research Institute, Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, Ohio, United States of America
- Department of Internal Medicine, The Ohio State University, Columbus, Ohio, United States of America
- * E-mail: (TDE); (CBM)
| | - Clay B. Marsh
- The Dorothy M. Davis Heart and Lung Research Institute, Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, Ohio, United States of America
- Department of Internal Medicine, The Ohio State University, Columbus, Ohio, United States of America
- * E-mail: (TDE); (CBM)
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Justiniano SE, Elavazhagan S, Fatehchand K, Shah P, Mehta P, Roda JM, Mo X, Cheney C, Hertlein E, Eubank TD, Marsh C, Muthusamy N, Butchar JP, Byrd JC, Tridandapani S. Fcγ receptor-induced soluble vascular endothelial growth factor receptor-1 (VEGFR-1) production inhibits angiogenesis and enhances efficacy of anti-tumor antibodies. J Biol Chem 2013; 288:26800-9. [PMID: 23902770 DOI: 10.1074/jbc.m113.485185] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Monocytes/macrophages are potent mediators of antitumor antibody therapy, where they engage target cells via Fcγ receptors (FcγR). Binding of these cells to opsonized tumor targets elicits cytokine production, phagocytosis, and antibody-mediated cellular cytotoxicity. Here we show for the first time that activation of monocyte FcγR results in the secretion of soluble vascular endothelial growth factor receptor-1 (VEGFR-1/sFlt-1), which serves to antagonize VEGF-mediated angiogenesis and tumor growth. Consistent with this, using a murine solid tumor model of antibody therapy, we show that sFlt-1 is involved in restricting tumor growth. Analyzing the mechanism of induction of sFlt-1, we found that the Erk and PI3K pathways were required for transcription, and NF-κB was required for translation. Upon closer examination of the role of NF-κB, we found that a microRNA, miR181a, negatively regulates FcγR-mediated sFlt-1 production and that NF-κB serves to antagonize this microRNA. Taken together, these results demonstrate a novel and biologically important function of monocytes and macrophages during antibody therapy.
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Dhimitruka I, Bobko AA, Eubank TD, Komarov DA, Khramtsov VV. Phosphonated trityl probes for concurrent in vivo tissue oxygen and pH monitoring using electron paramagnetic resonance-based techniques. J Am Chem Soc 2013; 135:5904-10. [PMID: 23517077 DOI: 10.1021/ja401572r] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Previously we proposed the concept of dual function pH and oxygen paramagnetic probes based on the incorporation of ionizable groups into the structure of persistent triarylmethyl radicals, TAMs (J. Am. Chem. Soc.2007, 129, 7240-7241). In this paper, we synthesized an asymmetric monophosphonated TAM probe with the simplest doublet hfs pattern ideally suited for dual function electron paramagnetic resonance (EPR)-based applications. An extraordinary low line width of the synthesized deuterated derivative, p1TAM-D (ΔHpp ≤ 50 mG, Lorentz line width, ≤20 mG) results in high sensitivity to pO2 due to oxygen-induced line broadening (ΔLW/ΔpO2 ≈ 0.5 mG/mmHg or ≈400 mG/mM); accuracy of pO2 measurement, ≈1 mmHg). The presence of a phosphono group in the p1TAM-D structure provides pH sensitivity to its EPR spectra in the physiological range of pH from 5.9 to 8.2 with the ratio of signal intensities of protonated and deprotonated states being a reliable pH marker (accuracy of pH measurements, ± 0.05). The independent character of pH and [O2] effects on the EPR spectra of p1TAM-D provides dual functionality to this probe. The L-band EPR studies performed in breast tumor-bearing mice show a significant difference in extracellular pH and pO2 between tumor and normal mammary gland tissues, as well as the effect of animal breathing with 100% O2 on tissue oxygenation. The developed dual function phosphonated p1TAM-D probe provides a unique tool for in vivo concurrent tissue oxygen and pH monitoring.
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Affiliation(s)
- Ilirian Dhimitruka
- Dorothy M. Davis Heart & Lung Research Institute and Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Department of Internal Medicine, The Ohio State University, Columbus, Ohio 43210, USA
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42
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Voorhees JL, Tarr AJ, Wohleb ES, Godbout JP, Mo X, Sheridan JF, Eubank TD, Marsh CB. Prolonged restraint stress increases IL-6, reduces IL-10, and causes persistent depressive-like behavior that is reversed by recombinant IL-10. PLoS One 2013; 8:e58488. [PMID: 23520517 PMCID: PMC3592793 DOI: 10.1371/journal.pone.0058488] [Citation(s) in RCA: 159] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Accepted: 02/05/2013] [Indexed: 12/19/2022] Open
Abstract
Altered inflammatory cytokine profiles are often observed in individuals suffering from major depression. Recent clinical work reports on elevated IL-6 and decreased IL-10 in depression. Elevated IL-6 has served as a consistent biomarker of depression and IL-10 is proposed to influence depressive behavior through its ability to counterbalance pro-inflammatory cytokine expression. Clinical and animal studies suggest a role for IL-10 in modifying depressive behavior. Murine restraint stress (RST) is regularly employed in the study of behavioral and biological symptoms associated with depressive disorders. While responses to acute RST exposure have been widely characterized, few studies have examined the ongoing and longitudinal effects of extended RST and fewer still have examined the lasting impact during the post-stress period. Consistent with clinical data, we report that a protocol of prolonged murine RST produced altered cytokine profiles similar to those observed in major depressive disorder. Parallel to these changes in circulating cytokines, IL-10 mRNA expression was diminished in the cortex and hippocampus throughout the stress period and following cessation of RST. Moreover, chronic RST promoted depressive-like behavior throughout the 28-day stress period and these depressive-like complications were maintained weeks after cessation of RST. Because of the correlation between IL-10 suppression and depressive behavior and because many successful antidepressant therapies yield increases in IL-10, we examined the effects of IL-10 treatment on RST-induced behavioral changes. Behavioral deficits induced by RST were reversed by exogenous administration of recombinant IL-10. This work provides one of the first reports describing the biological and behavioral impact following prolonged RST and, taken together, this study provides details on the correlation between responses to chronic RST and those seen in depressive disorders.
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Affiliation(s)
- Jeffrey L. Voorhees
- The Dorothy M. Davis Heart and Lung Research Institute, Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, Ohio, United States of America
- Department of Internal Medicine, The Ohio State University, Columbus, Ohio, United States of America
| | - Andrew J. Tarr
- Division of Oral Biology, The Ohio State University, Columbus, Ohio, United States of America
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio, United States of America
| | - Eric S. Wohleb
- Division of Oral Biology, The Ohio State University, Columbus, Ohio, United States of America
- Department of Molecular Virology, Immunology and Medical Genetics, The Ohio State University, Columbus, Ohio, United States of America
| | - Jonathan P. Godbout
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio, United States of America
- Department of Neuroscience, The Ohio State University, Columbus, Ohio, United States of America
- Center for Brain and Spinal Cord Repair, The Ohio State University, Columbus, Ohio, United States of America
| | - Xiaokui Mo
- Center for Biostatistics, The Ohio State University, Columbus, Ohio, United States of America
| | - John F. Sheridan
- Division of Oral Biology, The Ohio State University, Columbus, Ohio, United States of America
- Institute for Behavioral Medicine Research, The Ohio State University, Columbus, Ohio, United States of America
- Department of Molecular Virology, Immunology and Medical Genetics, The Ohio State University, Columbus, Ohio, United States of America
| | - Timothy D. Eubank
- The Dorothy M. Davis Heart and Lung Research Institute, Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, Ohio, United States of America
- Department of Internal Medicine, The Ohio State University, Columbus, Ohio, United States of America
- * E-mail: (TDE); (CBM)
| | - Clay B. Marsh
- The Dorothy M. Davis Heart and Lung Research Institute, Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, Ohio, United States of America
- Department of Internal Medicine, The Ohio State University, Columbus, Ohio, United States of America
- * E-mail: (TDE); (CBM)
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43
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Chen D, Roda JM, Marsh CB, Eubank TD, Friedman A. Hypoxia inducible factors-mediated inhibition of cancer by GM-CSF: a mathematical model. Bull Math Biol 2012; 74:2752-77. [PMID: 23073704 DOI: 10.1007/s11538-012-9776-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Accepted: 09/20/2012] [Indexed: 01/21/2023]
Abstract
Under hypoxia, tumor cells, and tumor-associated macrophages produce VEGF (vascular endothelial growth factor), a signaling molecule that induces angiogenesis. The same macrophages, when treated with GM-CSF (granulocyte/macrophage colony-stimulating factor), produce sVEGFR-1 (soluble VEGF receptor-1), a soluble protein that binds with VEGF and inactivates its function. The production of VEGF by macrophages is regulated by HIF-1α (hypoxia inducible factor-1α), and the production of sVEGFR-1 is mediated by HIF-2α. Recent experiments measured the effect of inhibiting tumor growth by GM-CSF treatment in mice with HIF-1α-deficient or HIF-2α-deficient macrophages. In the present paper, we represent these experiments by a mathematical model based on a system of partial differential equations. We show that the model simulations agree with the above experiments. The model can then be used to suggest strategies for inhibiting tumor growth. For example, the model qualitatively predicts the extent to which GM-CSF treatment in combination with a small molecule inhibitor that stabilizes HIF-2α will reduce tumor volume and angiogenesis.
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Affiliation(s)
- Duan Chen
- Mathematical Biosciences Institute, The Ohio State University, Columbus, OH, USA.
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44
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Roda JM, Wang Y, Sumner LA, Phillips GS, Marsh CB, Eubank TD. Stabilization of HIF-2α induces sVEGFR-1 production from tumor-associated macrophages and decreases tumor growth in a murine melanoma model. J Immunol 2012; 189:3168-77. [PMID: 22869907 PMCID: PMC3436995 DOI: 10.4049/jimmunol.1103817] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Macrophage secretion of vascular endothelial growth factor (VEGF) in response to hypoxia contributes to tumor growth and angiogenesis. In addition to VEGF, hypoxic macrophages stimulated with GM-CSF secrete high levels of a soluble form of the VEGF receptor (sVEGFR-1), which neutralizes VEGF and inhibits its biological activity. Using mice with a monocyte/macrophage-selective deletion of hypoxia-inducible factor (HIF)-1α or HIF-2α, we recently demonstrated that the antitumor response to GM-CSF was dependent on HIF-2α-driven sVEGFR-1 production by tumor-associated macrophages, whereas HIF-1α specifically regulated VEGF production. We therefore hypothesized that chemical stabilization of HIF-2α using an inhibitor of prolyl hydroxylase domain 3 (an upstream inhibitor of HIF-2α activation) would increase sVEGFR-1 production from GM-CSF-stimulated macrophages. Treatment of macrophages with the prolyl hydroxylase domain 3 inhibitor AKB-6899 stabilized HIF-2α and increased sVEGFR-1 production from GM-CSF-treated macrophages, with no effect on HIF-1α accumulation or VEGF production. Treatment of B16F10 melanoma-bearing mice with GM-CSF and AKB-6899 significantly reduced tumor growth compared with either drug alone. Increased levels of sVEGFR-1 mRNA, but not VEGF mRNA, were detected within the tumors of GM-CSF- and AKB-6899-treated mice, correlating with decreased tumor vascularity. Finally, the antitumor and antiangiogenic effects of AKB-6899 were abrogated when mice were simultaneously treated with a sVEGFR-1 neutralizing Ab. These results demonstrate that AKB-6899 decreases tumor growth and angiogenesis in response to GM-CSF by increasing sVEGFR-1 production from tumor-associated macrophages. Specific activation of HIF-2α can therefore decrease tumor growth and angiogenesis.
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MESH Headings
- Animals
- Antineoplastic Agents/metabolism
- Antineoplastic Agents/therapeutic use
- Basic Helix-Loop-Helix Transcription Factors/metabolism
- Basic Helix-Loop-Helix Transcription Factors/physiology
- Cell Line, Tumor
- Cells, Cultured
- Dioxygenases/antagonists & inhibitors
- Dioxygenases/biosynthesis
- Disease Models, Animal
- Granulocyte-Macrophage Colony-Stimulating Factor/administration & dosage
- Growth Inhibitors/biosynthesis
- Growth Inhibitors/metabolism
- Growth Inhibitors/therapeutic use
- Humans
- Hypoxia-Inducible Factor-Proline Dioxygenases
- Macrophages/immunology
- Macrophages/metabolism
- Macrophages/pathology
- Melanoma, Experimental/immunology
- Melanoma, Experimental/pathology
- Melanoma, Experimental/prevention & control
- Mice
- Mice, Inbred C57BL
- Mice, SCID
- Mice, Transgenic
- Neovascularization, Pathologic/immunology
- Neovascularization, Pathologic/metabolism
- Neovascularization, Pathologic/prevention & control
- Protein Stability
- Solubility
- Vascular Endothelial Growth Factor Receptor-1/biosynthesis
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Affiliation(s)
- Julie M. Roda
- The Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Department of Internal Medicine, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| | - Yijie Wang
- The Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Department of Internal Medicine, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| | - Laura A. Sumner
- The Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Department of Internal Medicine, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| | - Gary S. Phillips
- The Center for Biostatistics, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| | - Clay B. Marsh
- The Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Department of Internal Medicine, The Ohio State University College of Medicine, Columbus, OH 43210, USA
- The Comprehensive Cancer Center, The Ohio State University College of Medicine, Columbus, OH 43210, USA
| | - Timothy D. Eubank
- The Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Department of Internal Medicine, The Ohio State University College of Medicine, Columbus, OH 43210, USA
- The Comprehensive Cancer Center, The Ohio State University College of Medicine, Columbus, OH 43210, USA
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45
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Bobko AA, Eubank TD, Voorhees JL, Efimova OV, Kirilyuk IA, Petryakov S, Trofimiov DG, Marsh CB, Zweier JL, Grigor'ev IA, Samouilov A, Khramtsov VV. In vivo monitoring of pH, redox status, and glutathione using L-band EPR for assessment of therapeutic effectiveness in solid tumors. Magn Reson Med 2011; 67:1827-36. [PMID: 22113626 DOI: 10.1002/mrm.23196] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Revised: 06/22/2011] [Accepted: 08/03/2011] [Indexed: 01/27/2023]
Abstract
Approach for in vivo real-time assessment of tumor tissue extracellular pH (pH(e)), redox, and intracellular glutathione based on L-band EPR spectroscopy using dual function pH and redox nitroxide probe and disulfide nitroxide biradical, is described. These parameters were monitored in PyMT mice bearing breast cancer tumors during treatment with granulocyte macrophage colony-stimulating factor. It was observed that tumor pH(e) is about 0.4 pH units lower than that in normal mammary gland tissue. Treatment with granulocyte macrophage colony-stimulating factor decreased the value of pH(e) by 0.3 units compared with PBS control treatment. Tumor tissue reducing capacity and intracellular glutathione were elevated compared with normal mammary gland tissue. Granulocyte macrophage colony-stimulating factor treatment resulted in a decrease of the tumor tissue reducing capacity and intracellular glutathione content. In addition to spectroscopic studies, pH(e) mapping was performed using recently proposed variable frequency proton-electron double-resonance imaging. The pH mapping superimposed with MRI image supports probe localization in mammary gland/tumor tissue, shows high heterogeneity of tumor tissue pH(e) and a difference of about 0.4 pH units between average pH(e) values in tumor and normal mammary gland. In summary, the developed multifunctional approach allows for in vivo, noninvasive pH(e), extracellular redox, and intracellular glutathione content monitoring during investigation of various therapeutic strategies for solid tumors.
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Affiliation(s)
- Andrey A Bobko
- Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, Ohio 43210, USA
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46
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Roda JM, Sumner LA, Evans R, Phillips GS, Marsh CB, Eubank TD. Hypoxia-inducible factor-2α regulates GM-CSF-derived soluble vascular endothelial growth factor receptor 1 production from macrophages and inhibits tumor growth and angiogenesis. J Immunol 2011; 187:1970-6. [PMID: 21765015 DOI: 10.4049/jimmunol.1100841] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Macrophage secretion of vascular endothelial growth factor (VEGF) in response to the hypoxic tumor microenvironment contributes to tumor growth, angiogenesis, and metastasis. We have recently demonstrated that macrophages stimulated with GM-CSF at low O(2) secrete high levels of a soluble form of the VEGF receptor 1 (sVEGFR-1), which neutralizes VEGF and inhibits its biological activity. Using small interfering RNA targeting to deplete hypoxia-inducible factor (HIF)-1α or HIF-2α in murine macrophages, we found that macrophage production of sVEGFR-1 in response to low O(2) was dependent on HIF-2α, whereas HIF-1α specifically regulated VEGF production. In our current report, we evaluated the growth of B16F10 malignant melanoma in mice with a monocyte/macrophage-selective deletion of HIF-1α or HIF-2α (HIF-1α(flox/flox)- or HIF-2α(flox/+)/LysMcre mice). GM-CSF treatment increased intratumoral VEGF and sVEGFR-1 in control mice, an effect that was associated with a decrease in microvessel density. GM-CSF treatment of HIF-1α(flox/flox)/LysMcre mice induced sVEGFR-1 but not VEGF, resulting in an overall greater reduction in tumor growth and angiogenesis compared with control mice. In addition, real-time PCR for melanoma-specific genes revealed a significantly reduced presence of lung micrometastases in HIF-1α(flox/flox)/LysMcre mice treated with GM-CSF. Conversely, GM-CSF treatment induced VEGF but not sVEGFR-1 in HIF-2α(flox/+)/LysMcre mice, and, correspondingly, GM-CSF did not decrease tumor growth, angiogenesis, or lung metastasis in these mice. This study reveals opposing roles for the HIFs in the regulation of angiogenesis by tumor-associated macrophages and suggests that administration of GM-CSF might be an effective means of inducing sVEGFR-1 and inhibiting tumor growth and angiogenesis in patients with melanoma.
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Affiliation(s)
- Julie M Roda
- Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Department of Internal Medicine, The Ohio State University College of Medicine, Columbus, OH 43210, USA
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47
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Parihar A, Eubank TD, Doseff AI. Monocytes and macrophages regulate immunity through dynamic networks of survival and cell death. J Innate Immun 2010; 2:204-15. [PMID: 20375558 DOI: 10.1159/000296507] [Citation(s) in RCA: 218] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2009] [Accepted: 02/10/2010] [Indexed: 01/12/2023] Open
Abstract
Monocytes and macrophages are central cells of the innate immune system, responsible for defending against diverse pathogens. While they originate from a common myeloid precursor and share functions in innate immunity, each has a very distinct life span finely tuned by the apoptotic caspases. Normally, circulating monocytes are short-lived and undergo spontaneous apoptosis on a daily basis. Macrophages, however, have a longer life span. In chronic inflammatory diseases and, as recently recognized, in the tumor microenvironment, the inhibition of the apoptotic program promotes monocyte survival contributing to the accumulation of macrophages and the persistence of an inflammatory milieu. A complex network of differentiation factors and inflammatory stimuli determine monocyte/macrophage life span by blocking the apoptotic pathway and activating a myriad of survival pathways. Our understanding of apoptosis has flourished over the last decade, and its relevance in the regulation of the immune system is now indisputable. Nevertheless, how the complicated networks of survival and apoptotic regulators are integrated to determine cellular life span remains elusive. This review summarizes the contribution of the caspases and their regulators in monocyte/macrophage cell fate and discusses how these molecules orchestrate the initiation, maintenance, and resolution of inflammation. More provocatively, we discuss possible strategies to control inflammation by manipulating leukocyte life span.
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Affiliation(s)
- Arti Parihar
- Department of Biological Sciences, GDC College, Vikram University, Ujjain, India
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48
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Bobko AA, Dhimitruka I, Eubank TD, Marsh CB, Zweier JL, Khramtsov VV. Trityl-based EPR probe with enhanced sensitivity to oxygen. Free Radic Biol Med 2009; 47:654-8. [PMID: 19523513 PMCID: PMC2739013 DOI: 10.1016/j.freeradbiomed.2009.06.007] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2009] [Revised: 06/03/2009] [Accepted: 06/05/2009] [Indexed: 11/27/2022]
Abstract
An asymmetric derivative of the triarylmethyl radical, TAM-H, containing one aldehyde and two carboxyl groups, was synthesized. The electron paramagnetic resonance (EPR) spectrum of TAM-H is characterized by a doublet of narrow lines with a linewidth of 105 mG under anoxic conditions and hyperfine interaction constant of 245 mG. The partial overlap of the components of the doublet results in enhanced sensitivity of the spectral amplitudes ratio to oxygen compared with oxygen-induced linewidth broadening of a single line. Application of the TAM-H probe allows for EPR measurements in an extended range of oxygen pressures from atmospheric to 1 mm Hg, whereas the EPR spectrum linewidth of the popular TAM-based oxygen sensor Oxo63 is practically insensitive to oxygen partial pressures below 20 mm Hg. Enhanced sensitivity of the TAM-H probe relative to Oxo63 was demonstrated in the detection of oxygen consumption by Met-1 cancer cells. The TAM-H probe allowed prolonged measurements of oxygen depletion during the hypoxia stage and down to true anoxia (<or=1.5 mm Hg).
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Affiliation(s)
- Andrey A Bobko
- Dorothy M. Davis Heart & Lung Research Institute, Department of Internal Medicine, The Ohio State University, Columbus, OH 43210, USA
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49
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Abstract
The role of inflammation in idiopathic pulmonary fibrosis (IPF) is controversial. If inflammation were critical to the disease process, lung pathology would demonstrate an influx of inflammatory cells, and that the disease would respond to immunosuppression. Neither is true. The classic pathology does not display substantial inflammation, and no modulation of the immune system is effective as treatment. Recent data suggest that the pathophysiology of the disease is more a product of fibroblast dysfunction than of dysregulated inflammation. The role of inflammation in disease pathogenesis comes from pathology from atypical patients, biologic samples procured during exacerbations of the disease, and careful examination of biologic specimens from patients with stable disease. We suggest that inflammation is indeed a critical factor in IPF and propose five potential nontraditional mechanisms for the role of inflammation in the pathogenesis of IPF: the direct inflammatory hypothesis, the matrix hypothesis, the growth factor-receptor hypothesis, the plasticity hypothesis, and the vascular hypothesis. To address these, we review the literature exploring the differences in pathology, prognosis, and clinical course, as well as the role of cytokines, growth factors, and other mediators of inflammation, and last, the role of matrix and vascular supply in patients with IPF.
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Affiliation(s)
- Benjamin D Bringardner
- Department of Internal Medicine, Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio 43210, USA
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50
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Parinandi NL, Sharma A, Eubank TD, Kaufman BF, Kutala VK, Marsh CB, Ignarro LJ, Kuppusamy P. Nitroaspirin (NCX-4016), an NO donor, is antiangiogenic through induction of loss of redox-dependent viability and cytoskeletal reorganization in endothelial cells. Antioxid Redox Signal 2007; 9:1837-49. [PMID: 17760507 DOI: 10.1089/ars.2007.1603] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We recently reported that NCX-4016, a derivative of aspirin containing a nitro moiety that releases nitric oxide (NO) in a sustained fashion in biologic systems, is a potent cytotoxic agent inhibiting the proliferation of cisplatin-resistant human ovarian cancer cells. Therefore, we hypothesize that NCX-4016 possesses antiangiogenic properties. Our study with the bovine lung microvascular endothelial cells (BLMVECs) revealed that NCX-4016 significantly induced the loss of redox-dependent cell viability in a dose- and time-dependent manner, as assayed by the redox-sensitive Alamar blue cell viability assay. Fluorescence microscopy of cells labeled with NO-specific fluorophore (DAF-FM) confirmed that NCX-4016 generated significant levels of intracellular NO. NO donors, including S-nitroso-N-acetylpenicillamine, spermine NONOate, and isosorbide dinitrite, were less effective in causing loss of cell viability. Thiol-protectant, N-acetylcysteine, significantly attenuated the NCX-4016-induced loss of cell viability, suggesting the role of alteration of thiol-redox status therein. NCX-4016 also suppressed oxygen consumption, decreased transendothelial electrical resistance (EC barrier dysfunction), and induced actin cytoskeletal reorganization in BLMVECs. The in vitro assay with human umbilical vein ECs and BLMVECs revealed that NCX-4016, in a dose-dependent manner, significantly inhibited angiogenesis with almost complete inhibition at a 100-microM concentration, suggesting that NCX-4016 can act as an antiangiogenic drug.
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Affiliation(s)
- Narasimham L Parinandi
- Department of Internal Medicine, Divisions of Cardiology and Pulmonary, Critical Care, and Sleep Medicine, Dorothy M. Davis Heart and Lung Research Institute, College of Medicine, The Ohio State University, Columbus, Ohio 43210, USA.
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