1
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Huang J, Montelius M, Damber JE, Welén K. Magnetic Resonance Imaging as a Tool for Monitoring Intratibial Growth of Experimental Prostate Cancer Metastases in Mice. Methods Protoc 2023; 6:118. [PMID: 38133138 PMCID: PMC10745453 DOI: 10.3390/mps6060118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 11/27/2023] [Accepted: 12/02/2023] [Indexed: 12/23/2023] Open
Abstract
Bone metastases cause morbidity and mortality in several human cancer forms. Experimental models are used to unravel the mechanisms and identify possible treatment targets. The location inside the skeleton complicates accurate assessment. This study evaluates the performance of magnetic resonance imaging (MRI) of prostate cancer tumors growing intratibially in mice. MRI detected intratibial tumor lesions with a sensitivity and specificity of 100% and 89%, respectively, compared to histological evaluation. Location and some phenotypical features could also be readily detected with MRI. Regarding volume estimation, the correlation between MRI and histological assessment was high (p < 0.001, r = 0.936). In conclusion, this study finds MRI to be a reliable tool for in vivo, non-invasive, non-ionizing, real-time monitoring of intratibial tumor growth.
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Affiliation(s)
- Junchi Huang
- Sahlgrenska Center for Cancer Research, Department of Urology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, 405 30 Gothenburg, Sweden; (J.H.); (J.-E.D.)
| | - Mikael Montelius
- Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, 405 30 Gothenburg, Sweden;
| | - Jan-Erik Damber
- Sahlgrenska Center for Cancer Research, Department of Urology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, 405 30 Gothenburg, Sweden; (J.H.); (J.-E.D.)
| | - Karin Welén
- Sahlgrenska Center for Cancer Research, Department of Urology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, 405 30 Gothenburg, Sweden; (J.H.); (J.-E.D.)
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2
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Sciarretta F, Ceci V, Tiberi M, Zaccaria F, Li H, Zhou ZY, Sun Q, Konja D, Matteocci A, Bhusal A, Verri M, Fresegna D, Balletta S, Ninni A, Di Biagio C, Rosina M, Suk K, Centonze D, Wang Y, Chiurchiù V, Aquilano K, Lettieri-Barbato D. Lipocalin-2 promotes adipose-macrophage interactions to shape peripheral and central inflammatory responses in experimental autoimmune encephalomyelitis. Mol Metab 2023; 76:101783. [PMID: 37517520 PMCID: PMC10448472 DOI: 10.1016/j.molmet.2023.101783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/24/2023] [Accepted: 07/26/2023] [Indexed: 08/01/2023] Open
Abstract
OBJECTIVE Accumulating evidence suggests that dysfunctional adipose tissue (AT) plays a major role in the risk of developing multiple sclerosis (MS), the most common immune-mediated and demyelinating disease of the central nervous system. However, the contribution of adipose tissue to the etiology and progression of MS is still obscure. This study aimed at deciphering the responses of AT in experimental autoimmune encephalomyelitis (EAE), the best characterized animal model of MS. RESULTS AND METHODS We observed a significant AT loss in EAE mice at the onset of disease, with a significant infiltration of M1-like macrophages and fibrosis in the AT, resembling a cachectic phenotype. Through an integrative and multilayered approach, we identified lipocalin2 (LCN2) as the key molecule released by dysfunctional adipocytes through redox-dependent mechanism. Adipose-derived LCN2 shapes the pro-inflammatory macrophage phenotype, and the genetic deficiency of LCN2 specifically in AT reduced weight loss as well as inflammatory macrophage infiltration in spinal cord in EAE mice. Mature adipocytes downregulating LCN2 reduced lipolytic response to inflammatory stimuli (e.g. TNFα) through an ATGL-mediated mechanism. CONCLUSIONS Overall data highlighted a role LCN2 in exacerbating inflammatory phenotype in EAE model, suggesting a pathogenic role of dysfunctional AT in MS.
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Affiliation(s)
| | - Veronica Ceci
- PhD Program in Evolutionary Biology and Ecology, Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy; Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Marta Tiberi
- Laboratory of Resolution of Neuroinflammation, IRCCS Santa Lucia Foundation, 00179 Rome, Italy
| | - Fabio Zaccaria
- Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Haoyun Li
- The State Key Laboratory of Pharmaceutical Biotechnology; Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong SAR, China
| | - Zhong-Yan Zhou
- The State Key Laboratory of Pharmaceutical Biotechnology; Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong SAR, China; Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Qiyang Sun
- The State Key Laboratory of Pharmaceutical Biotechnology; Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong SAR, China
| | - Daniels Konja
- The State Key Laboratory of Pharmaceutical Biotechnology; Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong SAR, China
| | - Alessandro Matteocci
- Laboratory of Resolution of Neuroinflammation, IRCCS Santa Lucia Foundation, 00179 Rome, Italy; PhD program in Immunology, Molecular Medicine and Applied biotechnologies, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Anup Bhusal
- Department of Pharmacology, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea; BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea
| | - Martina Verri
- Pathology Unit, University Hospital Campus Bio-Medico of Rome, 00128 Rome, Italy
| | - Diego Fresegna
- Synaptic Immunopathology Lab, IRCCS San Raffaele Pisana, 00163 Rome, Italy
| | - Sara Balletta
- Department of Systems Medicine, Tor Vergata University, 00133 Rome, Italy; Unit of Neurology, IRCCS Neuromed, 86077 Pozzilli, Italy
| | - Andrea Ninni
- PhD Program in Evolutionary Biology and Ecology, Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy; Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Claudia Di Biagio
- Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Marco Rosina
- Neurology Unit, Fondazione PTV Policlinico Tor Vergata, Viale Oxford 81, 00133 Rome, Italy
| | - Kyoungho Suk
- Department of Pharmacology, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea; BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, School of Medicine, Kyungpook National University, Daegu 41944, Republic of Korea; Brain Science and Engineering Institute, Kyungpook National University, Daegu 41944, Republic of Korea
| | - Diego Centonze
- Department of Systems Medicine, Tor Vergata University, 00133 Rome, Italy; Unit of Neurology, IRCCS Neuromed, 86077 Pozzilli, Italy
| | - Yu Wang
- The State Key Laboratory of Pharmaceutical Biotechnology; Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong SAR, China
| | - Valerio Chiurchiù
- Laboratory of Resolution of Neuroinflammation, IRCCS Santa Lucia Foundation, 00179 Rome, Italy; Institute of Translational Pharmacology, National Research Council, 00133 Rome, Italy
| | - Katia Aquilano
- Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Daniele Lettieri-Barbato
- IRCCS, Fondazione Santa Lucia, 00179 Rome, Italy; Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy.
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3
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Van Court B, Neupert B, Nguyen D, Ross R, Knitz MW, Karam SD. Measurement of mouse head and neck tumors by automated analysis of CBCT images. Sci Rep 2023; 13:12033. [PMID: 37491456 PMCID: PMC10368694 DOI: 10.1038/s41598-023-39159-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 07/20/2023] [Indexed: 07/27/2023] Open
Abstract
Animal experiments are often used to determine effects of drugs and other biological conditions on cancer progression, but poor accuracy and reproducibility of established tumor measurement methods make results unreliable. In orthotopic mouse models of head and neck cancer, tumor volumes approximated from caliper measurements are conventionally used to compare groups, but geometrical challenges make the procedure imprecise. To address this, we developed software to better measure these tumors by automated analysis of cone-beam computed tomography (CBCT) scans. This allows for analyses of tumor shape and growth dynamics that would otherwise be too inaccurate to provide biological insight. Monitoring tumor growth by calipers and imaging in parallel, we find that caliper measurements of small tumors are weakly correlated with actual tumor volume and highly susceptible to experimenter bias. The method presented provides a unique window to sources of error in a foundational aspect of preclinical head and neck cancer research and a valuable tool to mitigate them.
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Affiliation(s)
- Benjamin Van Court
- Department of Radiation Oncology, University of Colorado, Anschutz Medical Campus, Aurora, USA
| | - Brooke Neupert
- Department of Radiation Oncology, University of Colorado, Anschutz Medical Campus, Aurora, USA
| | - Diemmy Nguyen
- Department of Radiation Oncology, University of Colorado, Anschutz Medical Campus, Aurora, USA
| | - Richard Ross
- Department of Radiation Oncology, University of Colorado, Anschutz Medical Campus, Aurora, USA
| | - Michael W Knitz
- Department of Radiation Oncology, University of Colorado, Anschutz Medical Campus, Aurora, USA
| | - Sana D Karam
- Department of Radiation Oncology, University of Colorado, Anschutz Medical Campus, Aurora, USA.
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4
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Rakhilin N, Yang B, Spilker ME, Manzuk LK, Montgomery MK, Shin E, Prashad N, Hwang J, Song Y, Loganzo F, Giddabasappa A, Ram S. Volumetric imaging of optically cleared and fluorescently labeled animal tissue (VIOLA) for quantifying the 3D biodistribution of nanoparticles at cellular resolution in tumor tissue. J Control Release 2023; 354:244-259. [PMID: 36596340 DOI: 10.1016/j.jconrel.2022.12.060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 12/17/2022] [Accepted: 12/29/2022] [Indexed: 01/05/2023]
Abstract
Nanoparticle (NP) technology holds significant promise to mediate targeted drug delivery to specific organs in the body. Understanding the 3D biodistribution of NPs in heterogeneous environments such as the tumor tissue can provide crucial information on efficacy, safety and potential clinical outcomes. Here we present a novel end-to-end workflow, VIOLA, which makes use of tissue clearing methodology in conjunction with high resolution imaging and advanced 3D image processing to quantify the spatiotemporal 3D biodistribution of fluorescently labeled ACCURIN® NPs. Specifically, we investigate the spatiotemporal biodistribution of NPs in three different murine tumor models (CT26, EMT6, and KPC-GEM) of increasing complexity and translational relevance. We have developed new endpoints to characterize NP biodistribution at multiple length scales. Our observations reveal that the macroscale NP biodistribution is spatially heterogeneous and exhibits a gradient with relatively high accumulation at the tumor periphery that progressively decreases towards the tumor core in all the tumor models. Microscale analysis revealed that NP extravasation from blood vessels increases in a time dependent manner and plateaus at 72 h post injection. Volumetric analysis and pharmacokinetic modeling of NP biodistribution in the vicinity of the blood vessels revealed that the local NP density exhibits a distance dependent spatiotemporal biodistribution which provide insights into the dynamics of NP extravasation in the tumor tissue. Our data represents a comprehensive analysis of NP biodistribution at multiple length scales in different tumor models providing unique insights into their spatiotemporal dynamics. Specifically, our results show that NPs exhibit a dynamic equilibrium with macroscale heterogeneity combined with microscale homogeneity.
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Affiliation(s)
| | - Bing Yang
- Comparative Medicine, Pfizer Inc., United States
| | - Mary E Spilker
- Medicine Design - Translational Modeling and Simulation, Pfizer Inc., United States
| | | | | | - Eyoung Shin
- Oncology Research Unit, Pfizer Inc., United States
| | | | | | - Youngho Song
- Oncology Research Unit, Pfizer Inc., United States
| | | | | | - Sripad Ram
- Drug Safety R&D, Pfizer Inc., United States.
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5
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Taylor JM, Chang M, Vaughan J, Horn PS, Zhang B, Leach JL, Vadivelu S, Abruzzo T. Cerebral Arterial Growth in Childhood. Pediatr Neurol 2022; 134:59-66. [PMID: 35839526 DOI: 10.1016/j.pediatrneurol.2022.06.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 05/22/2022] [Accepted: 06/19/2022] [Indexed: 10/17/2022]
Abstract
BACKGROUND Improved understanding of cerebral arterial growth in children may lead to advances in the diagnosis and treatment of pediatric cerebrovascular disease. We correlated cross-sectional diameters of major cerebral arterial structures with age, sex, head circumference, weight, and height in children without cerebrovascular disease. METHODS Children with normal brain magnetic resonance imaging (MRI) were retrospectively identified and stratified into 23 age cohorts from birth to age 18 years. Absence of vascular disease was verified by medical record review. Demographic and biometric data were obtained from medical records. Intracranial arterial diameter (IAD) was measured on T2-weighted fast spin echo brain MRI of vertebral, basilar, internal carotid artery, and circle of Willis arterial segments. RESULTS A total of 307 subjects are included in the analysis, including 5833 vessel segments (mean age 8.4 years, 53% female). Indications for imaging were headache (73%), seizure (26%) and concussion (1%). IAD rapidly increased during the first year of life (mean growth velocity 0.064 to 0.213 mm/month) and then plateaued or slightly decreased between age one and 18 years (mean growth velocity -0.002 to 0.003 mm/month). Multivariable analysis shows strongest correlation with head circumference as a predictor of IAD. Weaker correlations are associated with weight and age. Height and sex are not well correlated with IAD. CONCLUSIONS Intracranial arteries grow rapidly during the first year of life and then sharply plateau or slightly decrease in luminal diameter between infancy and early adulthood. IAD is more closely correlated with head circumference than age.
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Affiliation(s)
- J Michael Taylor
- Division of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio; University of Cincinnati, College of Medicine, Cincinnati, Ohio.
| | - Michael Chang
- Division of Ophthalmology, West Virginia University, School of Medicine, Morgantown, West Virginia
| | - Jessica Vaughan
- Division of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Paul S Horn
- Division of Neurology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio; University of Cincinnati, College of Medicine, Cincinnati, Ohio; Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Bin Zhang
- University of Cincinnati, College of Medicine, Cincinnati, Ohio; Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - James L Leach
- University of Cincinnati, College of Medicine, Cincinnati, Ohio; Department of Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Sudhakar Vadivelu
- University of Cincinnati, College of Medicine, Cincinnati, Ohio; Department of Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio; Division of Neurosurgery, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Todd Abruzzo
- Department of Radiology, Phoenix Children's Medical Group, Phoenix, Arizona; Mayo Clinic College of Medicine, Phoenix, Arizona; University of Arizona, College of Medicine, Phoenix, Arizona
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6
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Ilhan A, Sekeroglu B, Abiyev R. Brain tumor segmentation in MRI images using nonparametric localization and enhancement methods with U-net. Int J Comput Assist Radiol Surg 2022; 17:589-600. [DOI: 10.1007/s11548-022-02566-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 01/12/2022] [Indexed: 11/05/2022]
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7
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Cheng C, Wu Y, Xiao T, Xue J, Sun J, Xia H, Ma H, Lu L, Li J, Shi A, Bian T, Liu Q. METTL3-mediated m 6A modification of ZBTB4 mRNA is involved in the smoking-induced EMT in cancer of the lung. MOLECULAR THERAPY. NUCLEIC ACIDS 2021; 23:487-500. [PMID: 33510938 PMCID: PMC7806951 DOI: 10.1016/j.omtn.2020.12.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 12/06/2020] [Indexed: 02/06/2023]
Abstract
N6-methyladenosine (m6A) is an epigenetic modification associated with various tumors, but its role in tumorigenesis remains unexplored. Here, as confirmed by methylated RNA immunoprecipitation sequencing (meRIP-seq) and RNA sequencing (RNA-seq) analyses, exposure of human bronchial epithelial (HBE) cells to cigarette smoke extract (CSE) caused an m6A modification in the 3' UTR of ZBTB4, a transcriptional repressor. For these cells, CSE also elevated methyltransferase-like 3 (METTL3) levels, which increased the m6A modification of ZBTB4. RIP-qPCR illustrated that ZBTB4 was the intent gene of YTHDF2 and that levels of ZBTB4 were decreased in an YTHDF2-dependent mechanism. The lower levels of ZBTB4 were associated with upregulation of EZH2, which enhanced H3K27me3 combining with E-cadherin promoter, causing lower E-cadherin levels and induction of the epithelial-mesenchymal transition (EMT). Further, in the lungs of mice, downregulation of METTL3 alleviated the cigarette smoke (CS)-induced EMT. Further, the expression of METTL3 was high in the lung tissues of smokers and inversely correlated with ZBTB4. Overall, our results show that the METTL3-mediated m6A modification of ZBTB4 via EZH2 is involved in the CS-induced EMT and in lung cancer. These results indicate that m6A modifications are a potential therapeutic target of lung damage induced by CS.
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Affiliation(s)
- Cheng Cheng
- Center for Global Health, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
- China International Cooperation Center for Environment and Human Health, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
| | - Yan Wu
- Department of Respiratory and Critical Care Medicine, Wuxi People’s Hospital Affiliated to Nanjing Medical University, Wuxi 214023, Jiangsu, People’s Republic of China
| | - Tian Xiao
- Center for Global Health, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
- China International Cooperation Center for Environment and Human Health, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
| | - Junchao Xue
- Center for Global Health, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
- China International Cooperation Center for Environment and Human Health, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
| | - Jing Sun
- Center for Global Health, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
- China International Cooperation Center for Environment and Human Health, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
| | - Haibo Xia
- Center for Global Health, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
- China International Cooperation Center for Environment and Human Health, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
| | - Huimin Ma
- Center for Global Health, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
- China International Cooperation Center for Environment and Human Health, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
| | - Lu Lu
- Center for Global Health, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
- China International Cooperation Center for Environment and Human Health, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
| | - Junjie Li
- Center for Global Health, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
- China International Cooperation Center for Environment and Human Health, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
| | - Aimin Shi
- Center for Global Health, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
- China International Cooperation Center for Environment and Human Health, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
| | - Tao Bian
- Department of Respiratory and Critical Care Medicine, Wuxi People’s Hospital Affiliated to Nanjing Medical University, Wuxi 214023, Jiangsu, People’s Republic of China
| | - Qizhan Liu
- Center for Global Health, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
- China International Cooperation Center for Environment and Human Health, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People’s Republic of China
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8
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Li J, Xue J, Ling M, Sun J, Xiao T, Dai X, Sun Q, Cheng C, Xia H, Wei Y, Chen F, Liu Q. MicroRNA-15b in extracellular vesicles from arsenite-treated macrophages promotes the progression of hepatocellular carcinomas by blocking the LATS1-mediated Hippo pathway. Cancer Lett 2020; 497:137-153. [PMID: 33080309 DOI: 10.1016/j.canlet.2020.10.023] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 10/09/2020] [Accepted: 10/13/2020] [Indexed: 12/13/2022]
Abstract
Arsenic, a human carcinogen, causes various human cancers, including those of the skin, lung, and liver. Hepatocellular carcinomas (HCCs), which have high mortality, are common malignancies worldwide. Tumor-associated macrophages (TAMs), which are considered to be similar to M2-polarized macrophages, promote tumor invasion and progression. Small non-coding RNAs (miRNAs) regulate expression of genes involved in progression of various malignancies. Extracellular vesicles (EVs), as mediators of cell communication, pass specific miRNAs directly from TAMs to tumor cells, promoting tumor pathogenesis and metastasis. In HCCs, large tumor suppressor kinase 1 (LATS1), functions as a tumor suppressor. However, the molecular mechanism by which miRNA modulates LATS1 expression in HCCs remains unclear. The results show that exposure to arsenite, increased miR-15b levels and induced M2 polarization of THP-1 cells. Elevated levels of miR-15b were transferred from arsenite-treated-THP-1 (As-THP-1) cells to HCC cells via miR-15b in EVs inhibited activation of the Hippo pathway by targeting LATS1, and was involved in promoting the proliferation, migration, and invasion of HCC cells. In conclusion, miR-15b in EVs from As-THP-1 cells is transferred to HCC cells, in which it targets and downregulates LATS1 expression and promotes the proliferation, migration, and invasion of HCC cells.
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Affiliation(s)
- Junjie Li
- Center for Global Health, China International Cooperation Center for Environment and Human Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China; The Key Laboratory of Modern Toxicology of Ministry of Education, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People's Republic of China
| | - Junchao Xue
- Center for Global Health, China International Cooperation Center for Environment and Human Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China; The Key Laboratory of Modern Toxicology of Ministry of Education, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People's Republic of China
| | - Min Ling
- Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, 210009, Jiangsu, People's Republic of China
| | - Jing Sun
- Center for Global Health, China International Cooperation Center for Environment and Human Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China; The Key Laboratory of Modern Toxicology of Ministry of Education, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People's Republic of China
| | - Tian Xiao
- Center for Global Health, China International Cooperation Center for Environment and Human Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China; The Key Laboratory of Modern Toxicology of Ministry of Education, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People's Republic of China
| | - Xiangyu Dai
- Center for Global Health, China International Cooperation Center for Environment and Human Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China; The Key Laboratory of Modern Toxicology of Ministry of Education, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People's Republic of China
| | - Qian Sun
- Center for Global Health, China International Cooperation Center for Environment and Human Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China; The Key Laboratory of Modern Toxicology of Ministry of Education, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People's Republic of China
| | - Cheng Cheng
- Center for Global Health, China International Cooperation Center for Environment and Human Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China; The Key Laboratory of Modern Toxicology of Ministry of Education, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People's Republic of China
| | - Haibo Xia
- Center for Global Health, China International Cooperation Center for Environment and Human Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China; The Key Laboratory of Modern Toxicology of Ministry of Education, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People's Republic of China
| | - Yongyue Wei
- Center for Global Health, China International Cooperation Center for Environment and Human Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China
| | - Feng Chen
- Center for Global Health, China International Cooperation Center for Environment and Human Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China
| | - Qizhan Liu
- Center for Global Health, China International Cooperation Center for Environment and Human Health, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China; The Key Laboratory of Modern Toxicology of Ministry of Education, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Jiangsu Collaborative Innovation Center for Cancer Personalized Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, People's Republic of China.
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9
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Panetta JV, Cvetkovic D, Chen X, Chen L, Ma CMC. Radiodynamic therapy using 15-MV radiation combined with 5-aminolevulinic acid and carbamide peroxide for prostate cancer in vivo. Phys Med Biol 2020; 65:165008. [PMID: 32464613 DOI: 10.1088/1361-6560/ab9776] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Photodynamic therapy has been clinically proven to be effective, but its effect is limited to relatively shallow tumors because of its use of visible light. Radiodynamic therapy (RDT) has therefore been investigated as a means to treat deep-seated tumors. In this study, the treatment effect of a novel form of RDT consisting of radiation combined with 5-aminolevulinic acid (5-ALA) and carbamide peroxide was investigated using a mouse model. Male nude mice were injected bilaterally and subcutaneously with human prostate cancer (PC-3) cells and randomized into 8 treatment groups, consisting of various combinations of 15-MV radiotherapy (RT), 5-ALA, and carbamide peroxide. The treatment effect of a single fraction of treatment was measured by calculating tumor growth delay, monitored using weekly MR scans. The ability of the drugs to be delivered to the tumors was qualitatively measured using 18 F-FDG PET/CT scans. RDT was shown to significantly delay the tumor growth for the mouse model and tumor cell line investigated in this work. Tumors treated with RDT showed a decrease in tumor growth of 24 ± 9% and 21 ± 8% at one and two weeks post-treatment, respectively. Peroxide and 5-ALA did not contribute significantly to tumor growth delay when administered alone or separately with RT. Blood perfusion was shown to be able to deliver agents to the tumors investigated in this work, although uptake of 18 F-FDG was shown to be non-uniform.
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10
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Jalnefjord O, Montelius M, Arvidsson J, Forssell-Aronsson E, Starck G, Ljungberg M. Data-driven identification of tumor subregions based on intravoxel incoherent motion reveals association with proliferative activity. Magn Reson Med 2019; 82:1480-1490. [PMID: 31081969 PMCID: PMC6767386 DOI: 10.1002/mrm.27820] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 04/29/2019] [Accepted: 04/29/2019] [Indexed: 12/16/2022]
Abstract
PURPOSE Intravoxel incoherent motion (IVIM) analysis gives information on tissue diffusion and perfusion and may thus have a potential for e.g. tumor tissue characterization. This work aims to study if clustering based on IVIM parameter maps can identify tumor subregions, and to assess the relevance of obtained subregions by histological analysis. METHODS Fourteen mice with human neuroendocrine tumors were examined with diffusion-weighted imaging to obtain IVIM parameter maps. Gaussian mixture models with IVIM maps from all tumors as input were used to partition voxels into k clusters, where k = 2 was chosen for further analysis based on goodness of fit. Clustering was performed with and without the perfusion-related IVIM parameter D * , and with and without including spatial information. The validity of the clustering was assessed by comparison with corresponding histologically stained tumor sections. A Ki-67-based index quantifying the degree of tumor proliferation was considered appropriate for the comparison based on the obtained cluster characteristics. RESULTS The clustering resulted in one class with low diffusion and high perfusion and another with slightly higher diffusion and low perfusion. Strong agreement was found between tumor subregions identified by clustering and subregions identified by histological analysis, both regarding size and spatial agreement. Neither D * nor spatial information had substantial effects on the clustering results. CONCLUSIONS The results of this study show that IVIM parameter maps can be used to identify tumor subregions using a data-driven framework based on Gaussian mixture models. In the studied tumor model, the obtained subregions showed agreement with proliferative activity.
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Affiliation(s)
- Oscar Jalnefjord
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Mikael Montelius
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Jonathan Arvidsson
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Eva Forssell-Aronsson
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Göran Starck
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Maria Ljungberg
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden
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11
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Allchin RL, Kelly ME, Mamand S, Doran AG, Keane T, Ahearne MJ, Wagner SD. Structural and diffusion weighted MRI demonstrates responses to ibrutinib in a mouse model of follicular helper (Tfh) T-cell lymphoma. PLoS One 2019; 14:e0215765. [PMID: 31013298 PMCID: PMC6478326 DOI: 10.1371/journal.pone.0215765] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 04/07/2019] [Indexed: 01/22/2023] Open
Abstract
Recent analyses of the genetics of peripheral T-cell lymphoma (PTCL) have shown that a large proportion of cases are derived from normal follicular helper (Tfh) T-cells. The sanroque mouse strain bears a mutation that increases Tfh cell number and heterozygous animals (Roquinsan/+) develop lymphomas similar to human Tfh lymphoma. Here we demonstrate the usefulness of Roquinsan/+ animals as a pre-clinical model of Tfh lymphoma. Long latency of development and incomplete penetrance in this strain suggests the lymphomas are genetically diverse. We carried out preliminary genetic characterisation by whole exome sequencing and detected tumor specific mutations in Hsp90ab1, Ccnb3 and RhoA. Interleukin-2-inducible kinase (ITK) is expressed in Tfh lymphoma and is a potential therapeutic agent. A preclinical study of ibrutinib, a small molecule inhibitor of mouse and human ITK, in established lymphoma was carried out and showed lymphoma regression in 8/12 (67%) mice. Using T2-weighted MRI to assess lymph node volume and diffusion weighted MRI scanning as a measure of function, we showed that treatment increased mean apparent diffusion coefficient (ADC) suggesting cell death, and that change in ADC following treatment correlated with change in lymphoma volume. We suggest that heterozygous sanroque mice are a useful model of Tfh cell derived lymphomas in an immunocompetent animal.
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MESH Headings
- Adenine/analogs & derivatives
- Administration, Oral
- Animals
- Antineoplastic Agents/administration & dosage
- Disease Models, Animal
- Drug Evaluation, Preclinical/methods
- Heterozygote
- Humans
- Lymph Nodes/cytology
- Lymph Nodes/diagnostic imaging
- Lymph Nodes/drug effects
- Lymphoma, T-Cell, Peripheral/diagnostic imaging
- Lymphoma, T-Cell, Peripheral/drug therapy
- Lymphoma, T-Cell, Peripheral/genetics
- Magnetic Resonance Imaging
- Mice
- Piperidines
- Primary Cell Culture
- Pyrazoles/administration & dosage
- Pyrimidines/administration & dosage
- T-Lymphocytes, Helper-Inducer/drug effects
- T-Lymphocytes, Helper-Inducer/pathology
- Treatment Outcome
- Tumor Cells, Cultured
- Ubiquitin-Protein Ligases/genetics
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Affiliation(s)
- Rebecca L. Allchin
- Leicester Cancer Research Centre and Ernest and Helen Scott Haematology Research Institute, University of Leicester, Leicester, United Kingdom
| | - Michael E. Kelly
- Core Biotechnology Services, University of Leicester, Leicester, United Kingdom
| | - Sami Mamand
- Leicester Cancer Research Centre and Ernest and Helen Scott Haematology Research Institute, University of Leicester, Leicester, United Kingdom
| | - Anthony G. Doran
- European Bioinformatics Institute, Hinxton, Cambridge, United Kingdom
| | - Thomas Keane
- European Bioinformatics Institute, Hinxton, Cambridge, United Kingdom
| | - Matthew J. Ahearne
- Leicester Cancer Research Centre and Ernest and Helen Scott Haematology Research Institute, University of Leicester, Leicester, United Kingdom
| | - Simon D. Wagner
- Leicester Cancer Research Centre and Ernest and Helen Scott Haematology Research Institute, University of Leicester, Leicester, United Kingdom
- * E-mail:
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12
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Montelius M, Jalnefjord O, Spetz J, Nilsson O, Forssell‐Aronsson E, Ljungberg M. Multiparametric MR for non-invasive evaluation of tumour tissue histological characteristics after radionuclide therapy. NMR IN BIOMEDICINE 2019; 32:e4060. [PMID: 30693592 PMCID: PMC6590232 DOI: 10.1002/nbm.4060] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 11/26/2018] [Accepted: 11/26/2018] [Indexed: 05/05/2023]
Abstract
Early non-invasive tumour therapy response assessment requires methods sensitive to biological and physiological tumour characteristics. The aim of this study was to find and evaluate magnetic resonance imaging (MRI) derived tumour tissue parameters that correlate with histological parameters and that reflect effects of radionuclide therapy. Mice bearing a subcutaneous human small-intestine neuroendocrine tumour were i.v. injected with 177 Lu-octreotate. MRI was performed (7 T Bruker Biospec) on different post-therapy intervals (1 and 13 days) using T2-weighted imaging, mapping of T2* and T1 relaxation time constants, as well as diffusion and dynamic contrast enhancement (DCE-MRI) techniques. After MRI, animals were killed and tumours excised. Four differently stained histological sections of the most central imaged tumour plane were digitized, and segmentation techniques were used to produce maps reflecting fibrotic and vascular density, apoptosis, and proliferation. Histological maps were aligned with MRI-derived parametric maps using landmark-based registration. Correlations and predictive power were evaluated using linear mixed-effects models and cross-validation, respectively. Several MR parameters showed statistically significant correlations with histological parameters. In particular, three DCE-MRI-derived parameters reflecting capillary function additionally showed high predictive power regarding apoptosis (2/3) and proliferation (1/3). T1 could be used to predict vascular density, and perfusion fraction derived from diffusion MRI could predict fibrotic density, although with lower predictive power. This work demonstrates the potential to use multiparametric MRI to retrieve important information on the tumour microenvironment after radiotherapy. The non-invasiveness of the method also allows longitudinal tumour tissue characterization. Further investigation is warranted to evaluate the parameters highlighted in this study longitudinally, in larger studies, and with additional histological methods.
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Affiliation(s)
- Mikael Montelius
- Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, Department of Radiation PhysicsUniversity of GothenburgGothenburgSweden
| | - Oscar Jalnefjord
- Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, Department of Radiation PhysicsUniversity of GothenburgGothenburgSweden
- Department of Medical Physics and Biomedical EngineeringSahlgrenska University HospitalGothenburgSweden
| | - Johan Spetz
- Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, Department of Radiation PhysicsUniversity of GothenburgGothenburgSweden
| | - Ola Nilsson
- Institute of Biomedicine, Sahlgrenska Cancer Center, Sahlgrenska Academy, Department of PathologyUniversity of GothenburgGothenburgSweden
| | - Eva Forssell‐Aronsson
- Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, Department of Radiation PhysicsUniversity of GothenburgGothenburgSweden
| | - Maria Ljungberg
- Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, Department of Radiation PhysicsUniversity of GothenburgGothenburgSweden
- Department of Medical Physics and Biomedical EngineeringSahlgrenska University HospitalGothenburgSweden
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13
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Dai X, Chen C, Yang Q, Xue J, Chen X, Sun B, Luo F, Liu X, Xiao T, Xu H, Sun Q, Zhang A, Liu Q. Exosomal circRNA_100284 from arsenite-transformed cells, via microRNA-217 regulation of EZH2, is involved in the malignant transformation of human hepatic cells by accelerating the cell cycle and promoting cell proliferation. Cell Death Dis 2018; 9:454. [PMID: 29674685 PMCID: PMC5908808 DOI: 10.1038/s41419-018-0485-1] [Citation(s) in RCA: 123] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 03/08/2018] [Accepted: 03/12/2018] [Indexed: 12/31/2022]
Abstract
Intercellular communication between malignant cells and neighboring nonmalignant cells is involved in carcinogenesis. In the progression of carcinogenesis, exosomes are messengers for intercellular communication. Circular RNAs (circRNAs) are noncoding RNAs with functions that include regulation of the cell cycle and proliferation. However, the functions of exosomal circRNAs are not clear. The present research aimed to determine whether circRNAs secreted from arsenite-transformed human hepatic epithelial (L-02) cells are transferred into normal L-02 cells and become functionally active in the normal cells. The results showed that circRNA_100284 is involved in the malignant transformation of L-02 cells induced by arsenite. The medium from transformed L-02 cells induced upregulation of circRNA_100284, accelerated the cell cycle, and promoted proliferation of normal L-02 cells. Transformed cells transferred circRNA_100284 into normal L-02 cells via exosomes and led to the malignant transformation of the non-transformed cells. Knockdown of circRNA_100284, which reduced circRNA_100284 levels in exosomes derived from transformed L-02 cells, blocked the accelerated cell cycle and reduced proliferation and malignancy. In addition, in normal L-02 cells, exosomal circRNA_100284 derived from arsenite-transformed L-02 cells induced acceleration of the cell cycle and promoted proliferation via acting as a sponge of microRNA-217. Further, exosomal circRNA_100284 was upregulated in the sera of people exposed to arsenite. Thus, exosomes derived from transformed L-02 cells transferred circRNA_100284 to surrounding cells, which induced an accelerated cell cycle and promoted proliferation of normal liver cells and led to the malignant transformation of the non-transformed cells. The findings support the concept that exosomal circRNAs are involved in cell–cell communication during carcinogenesis induced by arsenite.
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Affiliation(s)
- Xiangyu Dai
- Institute of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China.,The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China
| | - Chao Chen
- Institute of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China.,The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China
| | - Qianlei Yang
- Institute of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China.,The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China
| | - Junchao Xue
- Institute of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China.,The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China
| | - Xiong Chen
- The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, School of Public Health, Guizhou Medical University, Guiyang, 550025, Guizhou, People's Republic of China
| | - Baofei Sun
- The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, School of Public Health, Guizhou Medical University, Guiyang, 550025, Guizhou, People's Republic of China
| | - Fei Luo
- Institute of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China.,The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China
| | - Xinlu Liu
- Institute of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China.,The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China
| | - Tian Xiao
- Institute of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China.,The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China
| | - Hui Xu
- Institute of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China.,The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China
| | - Qian Sun
- Institute of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China.,The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China
| | - Aihua Zhang
- The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, School of Public Health, Guizhou Medical University, Guiyang, 550025, Guizhou, People's Republic of China
| | - Qizhan Liu
- Institute of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China. .,The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, 211166, Jiangsu, People's Republic of China.
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14
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Montelius M, Spetz J, Jalnefjord O, Berger E, Nilsson O, Ljungberg M, Forssell-Aronsson E. Identification of Potential MR-Derived Biomarkers for Tumor Tissue Response to 177Lu-Octreotate Therapy in an Animal Model of Small Intestine Neuroendocrine Tumor. Transl Oncol 2018; 11:193-204. [PMID: 29331677 PMCID: PMC5772005 DOI: 10.1016/j.tranon.2017.12.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 12/04/2017] [Accepted: 12/06/2017] [Indexed: 02/08/2023] Open
Abstract
Magnetic resonance (MR) methods enable noninvasive, regional tumor therapy response assessment, but associations between MR parameters, underlying biology, and therapeutic effects must be investigated. The aim of this study was to investigate response assessment efficacy and biological associations of MR parameters in a neuroendocrine tumor (NET) model subjected to radionuclide treatment. Twenty-one mice with NETs received 177Lu-octreotate at day 0. MR experiments (day -1, 1, 3, 8, and 13) included T2-weighted, dynamic contrast-enhanced (DCE) and diffusion-weighted imaging (DWI) and relaxation measurements (T1/T2*). Tumor tissue was analyzed using proteomics. MR-derived parameters were evaluated for each examination day and for different radial distances from the tumor center. Response assessment efficacy and biological associations were evaluated using feature selection and protein expression correlations, respectively. Reduced tumor growth rate or shrinkage was observed until day 8, followed by reestablished growth in most tumors. The most important MR parameter for response prediction was DCE-MRI-derived pretreatment signal enhancement ratio (SER) at 40% to 60% radial distance, where it correlated significantly also with centrally sampled protein CCD89 (association: DNA damage and repair, proliferation, cell cycle arrest). The second most important was changed diffusion (D) between day -1 and day 3, at 60% to 80% radial distance, where it correlated significantly also with peripherally sampled protein CATA (association: oxidative stress, proliferation, cell cycle arrest, apoptotic cell death). Important information regarding tumor biology in response to radionuclide therapy is reflected in several MR parameters, SER and D in particular. The spatial and temporal information provided by MR methods increases the sensitivity for tumor therapy response.
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Affiliation(s)
- Mikael Montelius
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, Sweden.
| | - Johan Spetz
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, Sweden.
| | - Oscar Jalnefjord
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, Sweden.
| | - Evelin Berger
- Proteomics Core Facility, Sahlgrenska Academy, University of Gothenburg, Sweden.
| | - Ola Nilsson
- Department of Pathology, Institute of Biomedicine, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, Sweden.
| | - Maria Ljungberg
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, Sweden.
| | - Eva Forssell-Aronsson
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, Sweden.
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15
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Xiao T, Xue J, Shi M, Chen C, Luo F, Xu H, Chen X, Sun B, Sun Q, Yang Q, Dai X, Zhang A, Tang H, Liu Q. Circ008913,viamiR-889 regulation of DAB2IP/ZEB1, is involved in the arsenite-induced acquisition of CSC-like properties by human keratinocytes in carcinogenesis. Metallomics 2018; 10:1328-1338. [DOI: 10.1039/c8mt00207j] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Circ008913,viamiR-889 regulation of DAB2IP/ZEB1, is involved in the arsenite-induced acquisition of CSC-like properties and the neoplastic transformation.
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16
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Joseph J, Tomaszewski MR, Quiros-Gonzalez I, Weber J, Brunker J, Bohndiek SE. Evaluation of Precision in Optoacoustic Tomography for Preclinical Imaging in Living Subjects. J Nucl Med 2017; 58:807-814. [PMID: 28126890 DOI: 10.2967/jnumed.116.182311] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 12/15/2016] [Indexed: 12/12/2022] Open
Abstract
Optoacoustic tomography (OT) is now widely used in preclinical imaging; however, the precision (repeatability and reproducibility) of OT has yet to be determined. Methods: We used a commercial small-animal OT system. Measurements in stable phantoms were used to independently assess the impact of system variables on precision (using coefficient of variation, COV), including acquisition wavelength, rotational position, and frame averaging. Variables due to animal handling and physiology, such as anatomic placement and anesthesia conditions, were then assessed in healthy nude mice using the left kidney and spleen as reference organs. Temporal variation was assessed by repeated measurements over hours and days both in phantoms and in vivo. Sensitivity to small-molecule dyes was determined in phantoms and in vivo; precision was assessed in vivo using IRDye800CW. Results: OT COV in a stable phantom was less than 2.8% across all wavelengths over 30 d. The factors with the greatest impact on signal repeatability in phantoms were rotational position and user experience, both of which still resulted in a COV of less than 4% at 700 nm. Anatomic region-of-interest size showed the highest variation, at 12% and 18% COV in the kidney and spleen, respectively; however, functional SO2 measurements based on a standard operating procedure showed an exceptional reproducibility of less than 4% COV. COV for repeated injections of IRDye800CW was 6.6%. Sources of variability for in vivo data included respiration rate, degree of user experience, and animal placement. Conclusion: Data acquired with our small-animal OT system were highly repeatable and reproducible across subjects and over time. Therefore, longitudinal OT studies may be performed with high confidence when our standard operating procedure is followed.
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Affiliation(s)
- James Joseph
- Department of Physics and Cancer Research U.K. Cambridge Institute, University of Cambridge, United Kingdom
| | - Michal R Tomaszewski
- Department of Physics and Cancer Research U.K. Cambridge Institute, University of Cambridge, United Kingdom
| | - Isabel Quiros-Gonzalez
- Department of Physics and Cancer Research U.K. Cambridge Institute, University of Cambridge, United Kingdom
| | - Judith Weber
- Department of Physics and Cancer Research U.K. Cambridge Institute, University of Cambridge, United Kingdom
| | - Joanna Brunker
- Department of Physics and Cancer Research U.K. Cambridge Institute, University of Cambridge, United Kingdom
| | - Sarah E Bohndiek
- Department of Physics and Cancer Research U.K. Cambridge Institute, University of Cambridge, United Kingdom
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17
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Magnetic resonance imaging for precise radiotherapy of small laboratory animals. Z Med Phys 2017; 27:6-12. [DOI: 10.1016/j.zemedi.2016.05.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Revised: 04/18/2016] [Accepted: 05/23/2016] [Indexed: 11/21/2022]
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18
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Dalmo J, Spetz J, Montelius M, Langen B, Arvidsson Y, Johansson H, Parris TZ, Helou K, Wängberg B, Nilsson O, Ljungberg M, Forssell-Aronsson E. Priming increases the anti-tumor effect and therapeutic window of 177Lu-octreotate in nude mice bearing human small intestine neuroendocrine tumor GOT1. EJNMMI Res 2017; 7:6. [PMID: 28097640 PMCID: PMC5241264 DOI: 10.1186/s13550-016-0247-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 12/05/2016] [Indexed: 12/15/2022] Open
Abstract
Background 177Lu-[DOTA0, Tyr3]-octreotate (177Lu-octreotate) is used for treatment of patients with somatostatin receptor (SSTR) expressing neuroendocrine tumors. However, complete tumor remission is rarely seen, and optimization of treatment protocols is needed. In vitro studies have shown that irradiation can up-regulate the expression of SSTR1, 2 and 5, and increase 177Lu-octreotate uptake. The aim of the present study was to examine the anti-tumor effect of a 177Lu-octreotate priming dose followed 24 h later by a second injection of 177Lu-octreotate compared to a single administration of 177Lu-octreotate, performed on the human small intestine neuroendocrine tumor cell line, GOT1, transplanted to nude mice. Results Priming resulted in a 1.9 times higher mean absorbed dose to the tumor tissue per administered activity, together with a reduced mean absorbed dose for kidneys. Priming gave the best overall anti-tumor effects. Magnetic resonance imaging showed no statistically significant difference in tumor response between treatment with and without priming. Gene expression analysis demonstrated effects on cell cycle regulation. Biological processes associated with apoptotic cell death were highly affected in the biodistribution and dosimetry study, via differential regulation of, e.g., APOE, BAX, CDKN1A, and GADD45A. Conclusions Priming had the best overall anti-tumor effects and also resulted in an increased therapeutic window. Results indicate that potential biomarkers for tumor regrowth may be found in the p53 or JNK signaling pathways. Priming administration is an interesting optimization strategy for 177Lu-octreotate therapy of neuroendocrine tumors, and further studies should be performed to determine the mechanisms responsible for the reported effects. Electronic supplementary material The online version of this article (doi:10.1186/s13550-016-0247-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Johanna Dalmo
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, SE-413 45, Gothenburg, Sweden.
| | - Johan Spetz
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, SE-413 45, Gothenburg, Sweden
| | - Mikael Montelius
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, SE-413 45, Gothenburg, Sweden
| | - Britta Langen
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, SE-413 45, Gothenburg, Sweden
| | - Yvonne Arvidsson
- Department of Pathology, Institute of Biomedicine, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, SE-413 45, Gothenburg, Sweden
| | - Henrik Johansson
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, SE-413 45, Gothenburg, Sweden
| | - Toshima Z Parris
- Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, SE-413 45, Gothenburg, Sweden
| | - Khalil Helou
- Department of Oncology, Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, SE-413 45, Gothenburg, Sweden
| | - Bo Wängberg
- Department of Surgery, Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, SE-413 45, Gothenburg, Sweden
| | - Ola Nilsson
- Department of Pathology, Institute of Biomedicine, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, SE-413 45, Gothenburg, Sweden
| | - Maria Ljungberg
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, SE-413 45, Gothenburg, Sweden
| | - Eva Forssell-Aronsson
- Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Cancer Center, Sahlgrenska Academy, University of Gothenburg, SE-413 45, Gothenburg, Sweden
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Denis-Bacelar AM, Cronin SE, Da Pieve C, Paul RL, Eccles SA, Spinks TJ, Box C, Hall A, Sosabowski JK, Kramer-Marek G, Flux GD. Pre-clinical quantitative imaging and mouse-specific dosimetry for 111In-labelled radiotracers. EJNMMI Res 2016; 6:85. [PMID: 27885618 PMCID: PMC5122527 DOI: 10.1186/s13550-016-0238-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 11/14/2016] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND Accurate quantification in molecular imaging is essential to improve the assessment of novel drugs and compare the radiobiological effects of therapeutic agents prior to in-human studies. The aim of this study was to investigate the challenges and feasibility of pre-clinical quantitative imaging and mouse-specific dosimetry of 111In-labelled radiotracers. Attenuation, scatter and partial volume effects were studied using phantom experiments, and an activity calibration curve was obtained for varying sphere sizes. Six SK-OV-3-tumour bearing mice were injected with 111In-labelled HER2-targeting monoclonal antibodies (mAbs) (range 5.58-8.52 MBq). Sequential SPECT imaging up to 197 h post-injection was performed using the Albira SPECT/PET/CT pre-clinical scanner. Mice were culled for quantitative analysis of biodistribution studies. The tumour activity, mass and percentage of injected activity per gram of tissue (%IA/g) were calculated at the final scan time point and compared to the values determined from the biodistribution data. Delivered 111In-labelled mAbs tumour absorbed doses were calculated using mouse-specific convolution dosimetry, and absorbed doses for 90Y-labelled mAbs were extrapolated under the assumptions of equivalent injected activities, biological half-lives and uptake distributions as for 111In. RESULTS For the sphere sizes investigated (volume 0.03-1.17 ml), the calibration factor varied by a factor of 3.7, whilst for the range of tumour masses in the mice (41-232 mg), the calibration factor changed by a factor of 2.5. Comparisons between the mice imaging and the biodistribution results showed a statistically significant correlation for the tumour activity (r = 0.999, P < 0.0001) and the tumour mass calculations (r = 0.977, P = 0.0008), whilst no correlation was found for the %IA/g (r = 0.521, P = 0.29). Median tumour-absorbed doses per injected activity of 52 cGy/MBq (range 36-69 cGy/MBq) and 649 cGy/MBq (range 441-950 cGy/MBq) were delivered by 111In-labelled mAbs and extrapolated for 90Y-labelled mAbs, respectively. CONCLUSIONS This study demonstrates the need for multidisciplinary efforts to standardise imaging and dosimetry protocols in pre-clinical imaging. Accurate image quantification can improve the calculation of the activity, %IA/g and absorbed dose. Diagnostic imaging could be used to estimate the injected activities required for therapeutic studies, potentially reducing the number of animals used.
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Affiliation(s)
- Ana M Denis-Bacelar
- Joint Department of Physics, The Institute of Cancer Research and The Royal Marsden Hospital NHS Foundation Trust, London, SM2 5NG, United Kingdom.
| | - Sarah E Cronin
- Joint Department of Physics, The Institute of Cancer Research and The Royal Marsden Hospital NHS Foundation Trust, London, SM2 5NG, United Kingdom
| | - Chiara Da Pieve
- Joint Department of Physics, The Institute of Cancer Research and The Royal Marsden Hospital NHS Foundation Trust, London, SM2 5NG, United Kingdom
| | - Rowena L Paul
- Joint Department of Physics, The Institute of Cancer Research and The Royal Marsden Hospital NHS Foundation Trust, London, SM2 5NG, United Kingdom
| | - Sue A Eccles
- Division of Cancer Therapeutics, The Institute of Cancer Research, London, SM2 5NG, United Kingdom
| | - Terence J Spinks
- Joint Department of Physics, The Institute of Cancer Research and The Royal Marsden Hospital NHS Foundation Trust, London, SM2 5NG, United Kingdom
| | - Carol Box
- Division of Cancer Therapeutics, The Institute of Cancer Research, London, SM2 5NG, United Kingdom
| | - Adrian Hall
- Radiopharmacy Department, The Royal Marsden Hospital NHS Foundation Trust, London, SM2 5PT, United Kingdom
| | - Jane K Sosabowski
- Centre for Molecular Oncology, Barts Cancer Institute, Queen Mary University of London, London, EC1M 6BQ, United Kingdom
| | - Gabriela Kramer-Marek
- Division of Cancer Therapeutics, The Institute of Cancer Research, London, SM2 5NG, United Kingdom
- Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, SM2 5NG, United Kingdom
| | - Glenn D Flux
- Joint Department of Physics, The Institute of Cancer Research and The Royal Marsden Hospital NHS Foundation Trust, London, SM2 5NG, United Kingdom
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20
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Hamming-Vrieze O, van Kranen SR, Heemsbergen WD, Lange CAH, van den Brekel MWM, Verheij M, Rasch CRN, Sonke JJ. Analysis of GTV reduction during radiotherapy for oropharyngeal cancer: Implications for adaptive radiotherapy. Radiother Oncol 2016; 122:224-228. [PMID: 27866848 DOI: 10.1016/j.radonc.2016.10.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 07/15/2016] [Accepted: 10/04/2016] [Indexed: 10/20/2022]
Abstract
BACKGROUND AND PURPOSE Adaptive field size reduction based on gross tumor volume (GTV) shrinkage imposes risk on coverage. Fiducial markers were used as surrogate for behavior of tissue surrounding the GTV edge to assess this risk by evaluating if GTVs during treatment are dissolving or actually shrinking. MATERIALS AND METHODS Eight patients with oropharyngeal tumors treated with chemo-radiation were included. Before treatment, fiducial markers (0.035×0.2cm2, n=40) were implanted at the edge of the primary tumor. All patients underwent planning-CT, daily cone beam CT (CBCT) and MRIs (pre-treatment, weeks 3 and 6). Marker displacement on CBCT was compared to local GTV surface displacement on MRIs. Additionally, marker displacement relative to the GTV surfaces during treatment was measured. RESULTS GTV surface displacement derived from MRI was larger than derived from fiducial markers (average difference: 0.1cm in week 3). During treatment, the distance between markers and GTV surface on MRI in week 3 increased in 33%>0.3cm and in 10%>0.5cm. The MRI-GTV shrank faster than the surrounding tissue represented by the markers, i.e. adapting to GTV shrinkage may cause under-dosage of microscopic disease. CONCLUSIONS We showed that adapting to primary tumor GTV shrinkage on MRI mid-treatment is potentially not safe since at least part of the GTV is likely to be dissolving. Adjustment to clear anatomical boundaries, however, may be done safely.
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Affiliation(s)
- Olga Hamming-Vrieze
- Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands.
| | - Simon R van Kranen
- Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Wilma D Heemsbergen
- Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Charlotte A H Lange
- Department of Radiology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | | | - Marcel Verheij
- Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - Coen R N Rasch
- Department of Radiotherapy, Academic Medical Centre, Amsterdam, The Netherlands
| | - Jan Jakob Sonke
- Department of Radiation Oncology, The Netherlands Cancer Institute, Amsterdam, The Netherlands
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Abstract
OBJECTIVES This research study sought to improve the treatment of pancreatic cancer by improving the drug delivery of a promising AKT/PDK1 inhibitor, PHT-427, in poly(lactic-co-glycolic) acid (PLGA) nanoparticles. METHODS PHT-427 was encapsulated in single-emulsion and double-emulsion PLGA nanoparticles (SE-PLGA-427 and DE-PLGA-427). The drug release rate was evaluated to assess the effect of the second PLGA layer of DE-PLGA-427. Ex vivo cryo-imaging and drug extraction from ex vivo organs was used to assess the whole-body biodistribution in an orthotopic model of MIA PaCa-2 pancreatic cancer. Anatomical magnetic resonance imaging (MRI) was used to noninvasively assess the effects of 4 weeks of nanoparticle drug treatment on tumor size, and diffusion-weighted MRI longitudinally assessed changes in tumor cellularity. RESULTS DE-PLGA-427 showed delayed drug release and longer drug retention in the pancreas relative to SE-PLGA-427. Diffusion-weighted MRI indicated a consistent decrease in cellularity during drug treatment with both types of drug-loaded nanoparticles. Both SE- and DE-PLGA-427 showed a 6-fold and 4-fold reduction in tumor volume relative to untreated tumors and an elimination of primary pancreatic tumor in 68% of the mice. CONCLUSIONS These results indicated that the PLGA nanoparticles improved drug delivery of PHT-427 to pancreatic tumors, which improved the treatment of MIA PaCa-2 pancreatic cancer.
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Taromi S, Kayser G, von Elverfeldt D, Reichardt W, Braun F, Weber WA, Zeiser R, Burger M. An orthotopic mouse model of small cell lung cancer reflects the clinical course in patients. Clin Exp Metastasis 2016; 33:651-60. [PMID: 27380917 DOI: 10.1007/s10585-016-9808-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 06/29/2016] [Indexed: 01/01/2023]
Abstract
Small cell lung cancer (SCLC) is a highly aggressive subtype of lung cancer with very poor prognosis due to early metastatic spread and development of chemoresistance. In the last 30 years the study of SCLC has been constrained by a lack of primary human tumor specimen thus highlighting the need of a suitable mouse model. In this article we present the establishment of an orthotopic xenograft mouse model which accurately reproduced the clinical course of SCLC. Orthotopic implantation enabled engraftment of primary lung tumors in all injected mice. Furthermore, immunodeficiency of mice allowed formation of spontaneous metastases in characteristic organs. Bioluminescence Imaging, Magnetic Resonance Imaging and Positron emission tomography were applied to monitor engraftment, metabolism and the exact growth of tumors over time. In order to mimic the extensive disease stage, mice were injected with aggressive human chemoresistant cells leading to development of chemoresistant tumors and early metastatic spread. As a proof of concept treatment of tumor-bearing mice with conventional chemotherapeutics reduced tumor volumes, but a complete regression of tumors was not achieved. By mimicking the extensive disease stage our mouse model can facilitate the study of mechanisms contributing to chemoresistance and metastasis formation, as well as drug screening and evaluation of new treatment strategies for SCLC patients.
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Affiliation(s)
- Sanaz Taromi
- Department of Hematology/Oncology and Stem Cell Transplantation, University Medical Center, Hugstetter Str. 55, 70106, Freiburg, Germany
| | - Gian Kayser
- Department of Pathology, University Medical Center, Freiburg, Germany
| | | | - Wilfried Reichardt
- Department of Radiology Medical Physics, University Medical Center, Freiburg, Germany
| | - Friederike Braun
- Institute of Nuclear Medicine, University Medical Center, Freiburg, Germany
| | - Wolfgang A Weber
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, USA.,Institute of Nuclear Medicine, University Medical Center, Freiburg, Germany
| | - Robert Zeiser
- Department of Hematology/Oncology and Stem Cell Transplantation, University Medical Center, Hugstetter Str. 55, 70106, Freiburg, Germany
| | - Meike Burger
- Department of Hematology/Oncology and Stem Cell Transplantation, University Medical Center, Hugstetter Str. 55, 70106, Freiburg, Germany. .,Faculty of Medical and Life Sciences, University Futwangen, Campus Schwenningen, Jakob-Kienzle-Str. 17, 78054, Villingen-Schwenningen, Germany.
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23
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Nashed MG, Seidlitz EP, Frey BN, Singh G. Depressive-like behaviours and decreased dendritic branching in the medial prefrontal cortex of mice with tumors: A novel validated model of cancer-induced depression. Behav Brain Res 2015. [PMID: 26222786 DOI: 10.1016/j.bbr.2015.07.040] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Depression is commonly comorbid in cancer patients and has detrimental effects on disease progression. Evidence suggests that biological mechanisms may induce the onset of cancer-induced depression (CID). The present investigation aims to establish a validated preclinical animal model of CID. Female BALB/c mice were allocated to four groups: control (n=12), chronic oral exposure to corticosterone (CORT) (n=12), CORT exposure followed by chronic low dose fluoxetine (FLX) treatment (n=12), and subcutaneous inoculation of 4T1 mammary carcinoma cells (n=13). Anhedonia was evaluated using the sucrose preference test (SPT), and behavioural despair was evaluated using the forced swim test (FST) and tail suspension test (TST). Sholl analyses were used to examine the dendritic morphology of Golgi-Cox impregnated neurons from the medial prefrontal cortex (mPFC). CORT exposure and tumor burden were both associated with decreased sucrose preference, increased FST immobility, and decreased basilar and apical dendritic branching of neurons in the mPFC. CORT-induced behavioural and dendritic morphological changes were reversible by FLX. No differences in TST immobility were observed between groups. On the secondary TST outcome measure, CORT exposure and tumor burden were associated with a trend towards decreased power of movement. CORT exposure induced a positive control model of a depressive-like state, with FLX treatment confirming the predictive validity of the model. This verified the sensitivity of behavioural and histological tests, which were used to assess the CID model. The induction of a depressive-like state in this model represents the first successfully validated animal model of CID.
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Affiliation(s)
- Mina G Nashed
- Department of Pathology & Molecular Medicine, McMaster University, Hamilton, ON L8N 3Z5, Canada; Michael G. DeGroote Institute for Pain Research and Care, McMaster University, Hamilton, ON L8N 3Z5, Canada
| | - Eric P Seidlitz
- Department of Pathology & Molecular Medicine, McMaster University, Hamilton, ON L8N 3Z5, Canada; Michael G. DeGroote Institute for Pain Research and Care, McMaster University, Hamilton, ON L8N 3Z5, Canada
| | - Benicio N Frey
- Department of Psychiatry and Behavioural Neurosciences, McMaster University, Hamilton, ON L8N 3Z5, Canada; Mood Disorders Program and Women's Health Concerns Clinic, St. Joseph's Healthcare Hamilton, ON L8P 3P6, Canada
| | - Gurmit Singh
- Department of Pathology & Molecular Medicine, McMaster University, Hamilton, ON L8N 3Z5, Canada; Michael G. DeGroote Institute for Pain Research and Care, McMaster University, Hamilton, ON L8N 3Z5, Canada.
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Hectors SJCG, Jacobs I, Strijkers GJ, Nicolay K. Automatic segmentation of subcutaneous mouse tumors by multiparametric MR analysis based on endogenous contrast. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2014; 28:363-75. [PMID: 25427885 DOI: 10.1007/s10334-014-0472-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2014] [Revised: 10/26/2014] [Accepted: 10/29/2014] [Indexed: 10/24/2022]
Abstract
OBJECT Contrast-enhanced T1-weighted imaging is usually included in MRI procedures for automatic tumor segmentation. Use of an MR contrast agent may not be appropriate for some applications, however. We assessed the feasability of automatic tumor segmentation by multiparametric cluster analysis that uses intrinsic MRI contrast only. MATERIALS AND METHODS Multiparametric MRI consisting of quantitative T1, T2, and apparent diffusion coefficient (ADC) mapping was performed in mice bearing subcutaneous tumors (n = 21). k-means and fuzzy c-means clustering with all possible combinations of MRI parameters, i.e. feature vectors, and 2-7 clusters were performed on the multiparametric data. Clusters associated with tumor tissue were selected on the basis of the relative signal intensity of tumor tissue in T2-weighted images. The optimum segmentation method was determined by quantitative comparison of automatic segmentation with manual segmentation performed by three observers. In addition, the automatically segmented tumor volumes from seven separate tumor data sets were quantitatively compared with histology-derived tumor volumes. RESULTS The highest similarity index between manual and automatic segmentation (SI manual,automatic = 0.82 ± 0.06) was observed for k-means clustering with feature vector {T2, ADC} and four clusters. A strong linear correlation between automatically and manually segmented tumor volumes (R (2) = 0.99) was observed for this segmentation method. Automatically segmented tumor volumes also correlated strongly with histology-derived tumor volumes (R (2) = 0.96). CONCLUSION Automatic segmentation of mouse subcutaneous tumors can be achieved on the basis of endogenous MR contrast only.
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Affiliation(s)
- Stefanie J C G Hectors
- Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands,
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Liu Y, Luo F, Xu Y, Wang B, Zhao Y, Xu W, Shi L, Lu X, Liu Q. Epithelial-mesenchymal transition and cancer stem cells, mediated by a long non-coding RNA, HOTAIR, are involved in cell malignant transformation induced by cigarette smoke extract. Toxicol Appl Pharmacol 2014; 282:9-19. [PMID: 25447409 DOI: 10.1016/j.taap.2014.10.022] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 10/27/2014] [Accepted: 10/31/2014] [Indexed: 12/24/2022]
Abstract
The incidence of lung diseases, including cancer, caused by cigarette smoke is increasing, but the molecular mechanisms of gene regulation induced by cigarette smoke remain unclear. This report describes a long noncoding RNA (lncRNA) that is induced by cigarette smoke extract (CSE) and experiments utilizing lncRNAs to integrate inflammation with the epithelial-mesenchymal transition (EMT) in human bronchial epithelial (HBE) cells. The present study shows that, induced by CSE, IL-6, a pro-inflammatory cytokine, leads to activation of STAT3, a transcription activator. A ChIP assay determined that the interaction of STAT3 with the promoter regions of HOX transcript antisense RNA (HOTAIR) increased levels of HOTAIR. Blocking of IL-6 with anti-IL-6 antibody, decreasing STAT3, and inhibiting STAT3 activation reduced HOTAIR expression. Moreover, for HBE cells cultured in the presence of HOTAIR siRNA for 24h, the CSE-induced EMT, formation of cancer stem cells (CSCs), and malignant transformation were reversed. Thus, IL-6, acting on STAT3 signaling, which up-regulates HOTAIR in an autocrine manner, contributes to the EMT and to CSCs induced by CSE. These data define a link between inflammation and EMT, processes involved in the malignant transformation of cells caused by CSE. This link, mediated through lncRNAs, establishes a mechanism for CSE-induced lung carcinogenesis.
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Affiliation(s)
- Yi Liu
- Institute of Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China; The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China
| | - Fei Luo
- Institute of Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China; The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China
| | - Yuan Xu
- Institute of Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China; The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China
| | - Bairu Wang
- Institute of Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China; The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China
| | - Yue Zhao
- Institute of Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China; The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China
| | - Wenchao Xu
- Institute of Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China; The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China
| | - Le Shi
- Institute of Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China; The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China
| | - Xiaolin Lu
- Institute of Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China; The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China
| | - Qizhan Liu
- Institute of Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China; The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 210029, Jiangsu, P. R. China.
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26
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Meerang M, Boss A, Kenkel D, Broggini-Tenzer A, Bérard K, Lauk O, Arni S, Weder W, Opitz I. Evaluation of imaging techniques for the assessment of tumour progression in an orthotopic rat model of malignant pleural mesothelioma†. Eur J Cardiothorac Surg 2014; 47:e34-41. [PMID: 25344922 DOI: 10.1093/ejcts/ezu393] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVES An orthotopic rat tumour recurrence model for malignant pleural mesothelioma (MPM) provides clinical similarity to patients and is useful for drug testing combined with surgical intervention. Importantly, a reliable imaging method is required allowing for noninvasive and repetitive evaluation of the tumour load. We compared the tumour load assessed by bioluminescence and magnetic resonance imaging (MRI) to the macroscopic tumour volume as a reference standard. METHODS A total of 500,000 syngeneic rat MPM cells transfected with luciferase were implanted underneath the parietal pleura of immunocompetent rats (n=13). From the second day after implantation, bioluminescence measurements of the tumour load expressed as the maximum bioluminescent intensity (photon/second) were performed daily after intraperitoneal injection of the luciferase substrate, d-luciferin, to observe the first occurrence of tumour. Six days after the first detection of tumour, bioluminescence, MRI and macroscopic tumour volume measurement were conducted. For MRI, a 4.7-Tesla small animal imager equipped with a 1H whole-body rat coil was employed using T2-weighted fast spin-echo sequences. Tumour burden (mm3) was quantified from magnetic resonance transverse images by two independent readers by manual segmentation. Finally, the tumour burden assessed by bioluminescence and MRI was correlated (Pearson's correlation) with the macroscopic measurement of tumour (ellipsoid) volume. RESULTS In all rats, a single tumour nodule was found at the inoculation site with a median macroscopic volume of 46 mm3 (18-377 mm3). For tumour burden quantification of MRIs, we observed good interobserver correlation (R2=0.81, P<0.0001) as well as significant association with the macroscopic tumour volume (R2=0.59, P=0.002). However, the signal intensity of bioluminescence did not correspond to the macroscopic tumour volume (R2=0.01, P=0.76). CONCLUSIONS MRI is a reliable and reproducible noninvasive in vivo imaging method for MPM tumour burden assessment for the present MPM model.
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Affiliation(s)
- Mayura Meerang
- Division of Thoracic Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Andreas Boss
- Department of Radiology, University Hospital Zurich, Zurich, Switzerland
| | - David Kenkel
- Department of Radiology, University Hospital Zurich, Zurich, Switzerland
| | | | - Karima Bérard
- Division of Thoracic Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Olivia Lauk
- Division of Thoracic Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Stephan Arni
- Division of Thoracic Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Walter Weder
- Division of Thoracic Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Isabelle Opitz
- Division of Thoracic Surgery, University Hospital Zurich, Zurich, Switzerland
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Liu D, Chalkidou A, Landau DB, Marsden PK, Fenwick JD. Interstitial diffusion and the relationship between compartment modelling and multi-scale spatial-temporal modelling of (18)F-FLT tumour uptake dynamics. Phys Med Biol 2014; 59:5175-202. [PMID: 25138724 DOI: 10.1088/0031-9155/59/17/5175] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Tumour cell proliferation can be imaged via positron emission tomography of the radiotracer 3'-deoxy-3'-18F-fluorothymidine (18F-FLT). Conceptually, the number of proliferating cells might be expected to correlate more closely with the kinetics of 18F-FLT uptake than with uptake at a fixed time. Radiotracer uptake kinetics are standardly visualized using parametric maps of compartment model fits to time-activity-curves (TACs) of individual voxels. However the relationship between the underlying spatiotemporal accumulation of FLT and the kinetics described by compartment models has not yet been explored. In this work tumour tracer uptake is simulated using a mechanistic spatial-temporal model based on a convection-diffusion-reaction equation solved via the finite difference method. The model describes a chain of processes: the flow of FLT between the spatially heterogeneous tumour vasculature and interstitium; diffusion and convection of FLT within the interstitium; transport of FLT into cells; and intracellular phosphorylation. Using values of model parameters estimated from the biological literature, simulated FLT TACs are generated with shapes and magnitudes similar to those seen clinically. Results show that the kinetics of the spatial-temporal model can be recovered accurately by fitting a 3-tissue compartment model to FLT TACs simulated for those tumours or tumour sub-volumes that can be viewed as approximately closed, for which tracer diffusion throughout the interstitium makes only a small fractional change to the quantity of FLT they contain. For a single PET voxel of width 2.5-5 mm we show that this condition is roughly equivalent to requiring that the relative difference in tracer uptake between the voxel and its neighbours is much less than one.
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Affiliation(s)
- Dan Liu
- Department of Oncology, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford OX3 7DQ, UK
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28
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Vandeghinste B, Van Holen R, Vanhove C, De Vos F, Vandenberghe S, Staelens S. Use of a Ray-Based Reconstruction Algorithm to Accurately Quantify Preclinical MicroSPECT Images. Mol Imaging 2014. [DOI: 10.2310/7290.2014.00007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Bert Vandeghinste
- From the Department of Electronics and Information Systems, Medical Image and Signal Processing (MEDISIP) Research Group, Ghent University-IBBT-IBiTech, Ghent, Belgium; Laboratory of Radiopharmacy, Ghent University, Ghent, Belgium; and Molecular Imaging Center Antwerp (MICA), University of Antwerp, Wilrijk, Belgium
| | - Roel Van Holen
- From the Department of Electronics and Information Systems, Medical Image and Signal Processing (MEDISIP) Research Group, Ghent University-IBBT-IBiTech, Ghent, Belgium; Laboratory of Radiopharmacy, Ghent University, Ghent, Belgium; and Molecular Imaging Center Antwerp (MICA), University of Antwerp, Wilrijk, Belgium
| | - Christian Vanhove
- From the Department of Electronics and Information Systems, Medical Image and Signal Processing (MEDISIP) Research Group, Ghent University-IBBT-IBiTech, Ghent, Belgium; Laboratory of Radiopharmacy, Ghent University, Ghent, Belgium; and Molecular Imaging Center Antwerp (MICA), University of Antwerp, Wilrijk, Belgium
| | - Filip De Vos
- From the Department of Electronics and Information Systems, Medical Image and Signal Processing (MEDISIP) Research Group, Ghent University-IBBT-IBiTech, Ghent, Belgium; Laboratory of Radiopharmacy, Ghent University, Ghent, Belgium; and Molecular Imaging Center Antwerp (MICA), University of Antwerp, Wilrijk, Belgium
| | - Stefaan Vandenberghe
- From the Department of Electronics and Information Systems, Medical Image and Signal Processing (MEDISIP) Research Group, Ghent University-IBBT-IBiTech, Ghent, Belgium; Laboratory of Radiopharmacy, Ghent University, Ghent, Belgium; and Molecular Imaging Center Antwerp (MICA), University of Antwerp, Wilrijk, Belgium
| | - Steven Staelens
- From the Department of Electronics and Information Systems, Medical Image and Signal Processing (MEDISIP) Research Group, Ghent University-IBBT-IBiTech, Ghent, Belgium; Laboratory of Radiopharmacy, Ghent University, Ghent, Belgium; and Molecular Imaging Center Antwerp (MICA), University of Antwerp, Wilrijk, Belgium
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Iacomi M, Cascio D, Fauci F, Raso G. Mammographic images segmentation based on chaotic map clustering algorithm. BMC Med Imaging 2014; 14:12. [PMID: 24666766 PMCID: PMC3987162 DOI: 10.1186/1471-2342-14-12] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Accepted: 03/14/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND This work investigates the applicability of a novel clustering approach to the segmentation of mammographic digital images. The chaotic map clustering algorithm is used to group together similar subsets of image pixels resulting in a medically meaningful partition of the mammography. METHODS The image is divided into pixels subsets characterized by a set of conveniently chosen features and each of the corresponding points in the feature space is associated to a map. A mutual coupling strength between the maps depending on the associated distance between feature space points is subsequently introduced. On the system of maps, the simulated evolution through chaotic dynamics leads to its natural partitioning, which corresponds to a particular segmentation scheme of the initial mammographic image. RESULTS The system provides a high recognition rate for small mass lesions (about 94% correctly segmented inside the breast) and the reproduction of the shape of regions with denser micro-calcifications in about 2/3 of the cases, while being less effective on identification of larger mass lesions. CONCLUSIONS We can summarize our analysis by asserting that due to the particularities of the mammographic images, the chaotic map clustering algorithm should not be used as the sole method of segmentation. It is rather the joint use of this method along with other segmentation techniques that could be successfully used for increasing the segmentation performance and for providing extra information for the subsequent analysis stages such as the classification of the segmented ROI.
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Affiliation(s)
| | - Donato Cascio
- Dipartimento di Fisica e Chimica, Università Degli Studi di Palermo, Palermo, Italy.
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Small animal magnetic resonance imaging: an efficient tool to assess liver volume and intrahepatic vascular anatomy. J Surg Res 2013; 187:458-65. [PMID: 24342872 DOI: 10.1016/j.jss.2013.11.1079] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2013] [Revised: 10/28/2013] [Accepted: 11/11/2013] [Indexed: 12/12/2022]
Abstract
BACKGROUND To develop a noninvasive technique to assess liver volumetry and intrahepatic portal vein anatomy in a mouse model of liver regeneration. MATERIALS AND METHODS Fifty-two C57BL/6 male mice underwent magnetic resonance imaging (MRI) of the liver using a 4.7 T small animal MRI system after no treatment, 70% partial hepatectomy (PH), or selective portal vein embolization. The protocol consisted of the following sequences: three-dimensional-encoded spoiled gradient-echo sequence (repetition time per echo time 15 per 2.7 ms, flip angle 20°) for volumetry, and two-dimensional-encoded time-of-flight angiography sequence (repetition time per echo time 18 per 6.4 ms, flip angle 80°) for vessel visualization. Liver volume and portal vein segmentation was performed using a dedicated postprocessing software. In animals with portal vein embolization, portography served as reference standard. True liver volume was measured after sacrificing the animals. Measurements were carried out by two independent observers with subsequent analysis by the Cohen κ-test for interobserver agreement. RESULTS MRI liver volumetry highly correlated with the true liver volume measurement using a conventional method in both the untreated liver and the liver remnant after 70% PH with a high interobserver correlation coefficient of 0.94 (95% confidence interval, 0.80-0.98 for untreated liver [P < 0.001] and 0.90-0.97 after 70% PH [P < 0.001]). The diagnostic accuracy of magnetic resonance angiography for the occlusion of one branch of the portal vein was 0.95 (95% confidence interval, 0.84-1). The level of agreement between the two observers for the description of intrahepatic vascular anatomy was excellent (Cohen κ value = 0.925). CONCLUSIONS This protocol may be used for noninvasive liver volumetry and visualization of portal vein anatomy in mice. It will serve the dynamic study of new strategies to enhance liver regeneration in vivo.
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Ali R, Gunduz-Demir C, Szilágyi T, Durkee B, Graves EE. Semi-automatic segmentation of subcutaneous tumours from micro-computed tomography images. Phys Med Biol 2013; 58:8007-19. [PMID: 24168809 DOI: 10.1088/0031-9155/58/22/8007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This paper outlines the first attempt to segment the boundary of preclinical subcutaneous tumours, which are frequently used in cancer research, from micro-computed tomography (microCT) image data. MicroCT images provide low tissue contrast, and the tumour-to-muscle interface is hard to determine, however faint features exist which enable the boundary to be located. These are used as the basis of our semi-automatic segmentation algorithm. Local phase feature detection is used to highlight the faint boundary features, and a level set-based active contour is used to generate smooth contours that fit the sparse boundary features. The algorithm is validated against manually drawn contours and micro-positron emission tomography (microPET) images. When compared against manual expert segmentations, it was consistently able to segment at least 70% of the tumour region (n = 39) in both easy and difficult cases, and over a broad range of tumour volumes. When compared against tumour microPET data, it was able to capture over 80% of the functional microPET volume. Based on these results, we demonstrate the feasibility of subcutaneous tumour segmentation from microCT image data without the assistance of exogenous contrast agents. Our approach is a proof-of-concept that can be used as the foundation for further research, and to facilitate this, the code is open-source and available from www.setuvo.com.
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Affiliation(s)
- Rehan Ali
- Department of Radiation Oncology, Stanford University, Stanford, CA, USA
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