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Sahu SP, Liu Q, Prasad A, Hasan SMA, Liu Q, Rodriguez MXB, Mukhopadhyay O, Burk D, Francis J, Mukhopadhyay S, Fu X, Gartia MR. Characterization of fibrillar collagen isoforms in infarcted mouse hearts using second harmonic generation imaging. BIOMEDICAL OPTICS EXPRESS 2021; 12:604-618. [PMID: 33520391 PMCID: PMC7818962 DOI: 10.1364/boe.410347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 12/14/2020] [Accepted: 12/14/2020] [Indexed: 06/12/2023]
Abstract
We utilized collagen specific second harmonic generation (SHG) signatures coupled with correlative immunofluorescence imaging techniques to characterize collagen structural isoforms (type I and type III) in a murine model of myocardial infarction (MI). Tissue samples were imaged over a four week period using SHG, transmitted light microscopy and immunofluorescence imaging using fluorescently-labeled collagen antibodies. The post-mortem cardiac tissue imaging using SHG demonstrated a progressive increase in collagen deposition in the left ventricle (LV) post-MI. We were able to monitor structural morphology and LV remodeling parameters in terms of extent of LV dilation, stiffness and fiber dimensions in the infarcted myocardium.
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Affiliation(s)
- Sushant P Sahu
- Department of Chemistry, University of Louisiana at Lafayette, Lafayette, LA 70504, USA
| | - Qianglin Liu
- LSU AgCenter, School of Animal Sciences, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Alisha Prasad
- Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Syed Mohammad Abid Hasan
- Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Qun Liu
- Department of Computer Science, Louisiana State University, Baton Rouge, LA 70803, USA
| | | | | | - David Burk
- Shared Instrumentation Facility and Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
| | - Joseph Francis
- Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Supratik Mukhopadhyay
- Department of Computer Science, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Xing Fu
- LSU AgCenter, School of Animal Sciences, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Manas Ranjan Gartia
- Department of Mechanical and Industrial Engineering, Louisiana State University, Baton Rouge, LA 70803, USA
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Hsiao CY, Teng X, Su TH, Lee PH, Kao JH, Huang KW. Improved quantitative assessment of HBV-associated liver fibrosis using second-harmonic generation microscopy with feature selection. Clin Res Hepatol Gastroenterol 2020; 44:12-20. [PMID: 31076362 DOI: 10.1016/j.clinre.2019.04.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 04/08/2019] [Accepted: 04/09/2019] [Indexed: 02/04/2023]
Abstract
BACKGROUND AND AIM Quantitative assessments of liver fibrosis using second-harmonic generation/two-photon excited fluorescence microscopy provide greater sensitivity and accuracy than collagen proportionate area while eliminating operator-dependent variation in the staining process. In conjunction with sophisticated image analysis algorithms and feature selection, we might reduce the computation cost in future and narrow down the candidates for further clinical studies. METHODS We sampled a total of 244 liver specimens from patients with hepatitis B viral infections who underwent liver biopsy or liver resection at the National Taiwan University Hospital. The samples were then imaged using a Genesis (HistoIndex Pte. Ltd, Singapore) system, wherein second-harmonic generation microscopy was used to visualize collagen, and two-photon excited fluorescence microscopy was used to visualize other cell structures. We used 100 morphological features extracted from the images to assess correlations with METAVIR fibrosis scores. RESULTS Out of 100 quantitative measurements, 76 showed significant correlation with METAVIR scoring, thereby enabling the statistical discrimination of patients in various stages of the disease. These 76 features were also narrowed down by the nonlinear test to 10 candidate measurements, which can be further investigated in detail. CONCLUSIONS Our experimental results showed that the model with 10 selected features can beat the one with second-harmonic generation only, and performed equivalently well compared the model with 76 features, especially for early-stage discrimination. Features presenting significant correlation were used to fit a single combined index in order to predict pathological staging, thereby making it possible to reveal incremental progress during treatment.
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Affiliation(s)
- C-Y Hsiao
- Department of Surgery, National Taiwan University Hospital Yun-Lin Branch, Yun-Lin County, Taiwan; Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan
| | - X Teng
- HistoIndex Pte Ltd, Singapore
| | - T-H Su
- Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan; Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan; Hepatitis Research Center, National Taiwan University Hospital, Taipei, Taiwan
| | - P-H Lee
- Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan; Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan
| | - J-H Kao
- Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan; Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan; Hepatitis Research Center, National Taiwan University Hospital, Taipei, Taiwan
| | - K-W Huang
- Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan; Hepatitis Research Center, National Taiwan University Hospital, Taipei, Taiwan; Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan.
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Lin H, Fan T, Sui J, Wang G, Chen J, Zhuo S, Zhang H. Recent advances in multiphoton microscopy combined with nanomaterials in the field of disease evolution and clinical applications to liver cancer. NANOSCALE 2019; 11:19619-19635. [PMID: 31599299 DOI: 10.1039/c9nr04902a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Multiphoton microscopy (MPM) is expected to become a powerful clinical tool, with its unique advantages of being label-free, high resolution, deep imaging depth, low light photobleaching and low phototoxicity. Nanomaterials, with excellent physical and chemical properties, are biocompatible and easy to prepare and functionalize. The addition of nanomaterials exactly compensates for some defects of MPM, such as the weak endogenous signal strength, limited imaging materials, insufficient imaging depth and lack of therapeutic effects. Therefore, combining MPM with nanomaterials is a promising biomedical imaging method. Here, we mainly review the principle of MPM and its application in liver cancer, especially in disease evolution and clinical applications, including monitoring tumor progression, diagnosing tumor occurrence, detecting tumor metastasis, and evaluating cancer therapy response. Then, we introduce the latest advances in the combination of MPM with nanomaterials, including the MPM imaging of gold nanoparticles (AuNPs) and carbon dots (CDs). Finally, we also propose the main challenges and future research directions of MPM technology in HCC.
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Affiliation(s)
- Hongxin Lin
- Fujian Normal University, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fuzhou, 350007, China.
| | - Taojian Fan
- Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, 518060, China.
| | - Jian Sui
- Department of Gastrointestinal surgery, Fujian Provincial Hospital, Fuzhou, 350000, China
| | - Guangxing Wang
- Fujian Normal University, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fuzhou, 350007, China.
| | - Jianxin Chen
- Fujian Normal University, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fuzhou, 350007, China.
| | - Shuangmu Zhuo
- Fujian Normal University, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fuzhou, 350007, China.
| | - Han Zhang
- Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, 518060, China.
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Saitou T, Takanezawa S, Ninomiya H, Watanabe T, Yamamoto S, Hiasa Y, Imamura T. Tissue Intrinsic Fluorescence Spectra-Based Digital Pathology of Liver Fibrosis by Marker-Controlled Segmentation. Front Med (Lausanne) 2019; 5:350. [PMID: 30619861 PMCID: PMC6297145 DOI: 10.3389/fmed.2018.00350] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 11/28/2018] [Indexed: 01/16/2023] Open
Abstract
Tissue intrinsic emission fluorescence provides useful diagnostic information for various diseases. Because of its unique feature of spectral profiles depending on tissue types, spectroscopic imaging is a promising tool for accurate evaluation of endogenous fluorophores. However, due to difficulties in discriminating those sources, quantitative analysis remains challenging. In this study, we quantitatively investigated spectral-spatial features of multi-photon excitation fluorescence in normal and diseased livers. For morphometrics of multi-photon excitation spectra, we examined a marker-controlled segmentation approach and its application to liver fibrosis assessment by employing a mouse model of carbon tetrachloride (CCl4)-induced liver fibrosis. We formulated a procedure of internal marker selection where markers were chosen to reflect typical biochemical species in the liver, followed by image segmentation and local morphological feature extraction. Image segmentation enabled us to apply mathematical morphology analysis, and the local feature was applied to the automated classification test based on a machine learning framework, both demonstrating highly accurate classifications. Through the analyses, we showed that spectral imaging of native fluorescence from liver tissues have the capability of differentiating not only between normal and diseased, but also between progressive disease states. The proposed approach provides the basics of spectroscopy-based digital histopathology of chronic liver diseases, and can be applied to a range of diseases associated with autofluorescence alterations.
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Affiliation(s)
- Takashi Saitou
- Department of Molecular Medicine for Pathogenesis, Graduate School of Medicine, Ehime University, Toon, Japan.,Translational Research Center, Ehime University Hospital, Toon, Japan.,Division of Bio-Imaging, Proteo-Science Center (PROS), Ehime University, Toon, Japan
| | - Sota Takanezawa
- Department of Molecular Medicine for Pathogenesis, Graduate School of Medicine, Ehime University, Toon, Japan
| | - Hiroko Ninomiya
- Department of Molecular Medicine for Pathogenesis, Graduate School of Medicine, Ehime University, Toon, Japan
| | - Takao Watanabe
- Department of Gastroenterology and Metabiology, Graduate School of Medicine, Ehime University, Toon, Japan
| | - Shin Yamamoto
- Department of Gastroenterology and Metabiology, Graduate School of Medicine, Ehime University, Toon, Japan.,Department of Lifestyle-related Medicine and Endocrinology, Graduate School of Medicine, Ehime University, Toon, Japan
| | - Yoichi Hiasa
- Department of Gastroenterology and Metabiology, Graduate School of Medicine, Ehime University, Toon, Japan
| | - Takeshi Imamura
- Department of Molecular Medicine for Pathogenesis, Graduate School of Medicine, Ehime University, Toon, Japan.,Translational Research Center, Ehime University Hospital, Toon, Japan.,Division of Bio-Imaging, Proteo-Science Center (PROS), Ehime University, Toon, Japan
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Ricard-Blum S, Baffet G, Théret N. Molecular and tissue alterations of collagens in fibrosis. Matrix Biol 2018; 68-69:122-149. [DOI: 10.1016/j.matbio.2018.02.004] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 02/02/2018] [Accepted: 02/02/2018] [Indexed: 02/07/2023]
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Liu F, Chen L, Rao HY, Teng X, Ren YY, Lu YQ, Zhang W, Wu N, Liu FF, Wei L. Automated evaluation of liver fibrosis in thioacetamide, carbon tetrachloride, and bile duct ligation rodent models using second-harmonic generation/two-photon excited fluorescence microscopy. J Transl Med 2017; 97:84-92. [PMID: 27918557 DOI: 10.1038/labinvest.2016.128] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 10/16/2016] [Accepted: 11/01/2016] [Indexed: 02/07/2023] Open
Abstract
Animal models provide a useful platform for developing and testing new drugs to treat liver fibrosis. Accordingly, we developed a novel automated system to evaluate liver fibrosis in rodent models. This system uses second-harmonic generation (SHG)/two-photon excited fluorescence (TPEF) microscopy to assess a total of four mouse and rat models, using chemical treatment with either thioacetamide (TAA) or carbon tetrachloride (CCl4), and a surgical method, bile duct ligation (BDL). The results obtained by the new technique were compared with that using Ishak fibrosis scores and two currently used quantitative methods for determining liver fibrosis: the collagen proportionate area (CPA) and measurement of hydroxyproline (HYP) content. We show that 11 shared morphological parameters faithfully recapitulate Ishak fibrosis scores in the models, with high area under the receiver operating characteristic (ROC) curve (AUC) performance. The AUC values of 11 shared parameters were greater than that of the CPA (TAA: 0.758-0.922 vs 0.752-0.908; BDL: 0.874-0.989 vs 0.678-0.966) in the TAA mice and BDL rat models and similar to that of the CPA in the TAA rat and CCl4 mouse models. Similarly, based on the trends in these parameters at different time points, 9, 10, 7, and 2 model-specific parameters were selected for the TAA rats, TAA mice, CCl4 mice, and BDL rats, respectively. These parameters identified differences among the time points in the four models, with high AUC accuracy, and the corresponding AUC values of these parameters were greater compared with those of the CPA in the TAA rat and mouse models (rats: 0.769-0.894 vs 0.64-0.799; mice: 0.87-0.93 vs 0.739-0.836) and similar to those of the CPA in the CCl4 mouse and BDL rat models. Similarly, the AUC values of 11 shared parameters and model-specific parameters were greater than those of HYP in the TAA rats, TAA mice, and CCl4 mouse models and were similar to those of HYP in the BDL rat models. The automated evaluation system, combined with 11 shared parameters and model-specific parameters, could specifically, accurately, and quantitatively stage liver fibrosis in animal models.
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Affiliation(s)
- Feng Liu
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing, China
| | - Long Chen
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing, China
| | - Hui-Ying Rao
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing, China
| | - Xiao Teng
- Hangzhou Choutu Technology, Hangzhou, China
| | - Ya-Yun Ren
- Hangzhou Choutu Technology, Hangzhou, China
| | | | - Wei Zhang
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing, China
| | - Nan Wu
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing, China
| | - Fang-Fang Liu
- Department of Pathology, Peking University People's Hospital, Beijing, China
| | - Lai Wei
- Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing, China
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Quantitative imaging of fibrotic and morphological changes in liver of non-alcoholic steatohepatitis (NASH) model mice by second harmonic generation (SHG) and auto-fluorescence (AF) imaging using two-photon excitation microscopy (TPEM). Biochem Biophys Rep 2016; 8:277-283. [PMID: 28955967 PMCID: PMC5614464 DOI: 10.1016/j.bbrep.2016.09.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 08/06/2016] [Accepted: 09/22/2016] [Indexed: 12/18/2022] Open
Abstract
Non-alcoholic steatohepatitis (NASH) is a common liver disorder caused by fatty liver. Because NASH is associated with fibrotic and morphological changes in liver tissue, a direct imaging technique is required for accurate staging of liver tissue. For this purpose, in this study we took advantage of two label-free optical imaging techniques, second harmonic generation (SHG) and auto-fluorescence (AF), using two-photon excitation microscopy (TPEM). Three-dimensional ex vivo imaging of tissues from NASH model mice, followed by image processing, revealed that SHG and AF are sufficient to quantitatively characterize the hepatic capsule at an early stage and parenchymal morphologies associated with liver disease progression, respectively. Combination of two label-free optical imaging techniques for the evaluation of liver disease is proposed. SHG is sufficient to quantitatively characterize the hepatic capsule at an early stage of NASH. Auto-fluorescence is useful to evaluate the parenchymal morphologies associated with liver disease progression.
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Le Gratiet A, Dubreuil M, Rivet S, Le Grand Y. Scanning Mueller polarimetric microscopy. OPTICS LETTERS 2016; 41:4336-9. [PMID: 27628391 DOI: 10.1364/ol.41.004336] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
A full Mueller polarimeter was implemented on a commercial laser-scanning microscope. The new polarimetric microscope is based on high-speed polarization modulation by spectral coding using a wavelength-swept laser as a source. Calibration as well as estimation of the measurement errors of the device are reported. The acquisition of Mueller images at the speed of a scanning microscope is demonstrated for the first time. Mueller images of mineral and biological samples illustrate this new polarimetric microscopy.
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Tissier F, Mallem Y, Goanvec C, Didier R, Aubry T, Bourgeois N, Desfontis JC, Dubreuil M, Le Grand Y, Mansourati J, Pichavant-Rafini K, Plee-Gautier E, Roquefort P, Theron M, Gilard M. A non-hypocholesterolemic atorvastatin treatment improves vessel elasticity by acting on elastin composition in WHHL rabbits. Atherosclerosis 2016; 251:70-77. [PMID: 27266824 DOI: 10.1016/j.atherosclerosis.2016.05.039] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 05/13/2016] [Accepted: 05/25/2016] [Indexed: 12/28/2022]
Abstract
BACKGROUND AND AIMS Statins are prescribed for their preventative effects within atherosclerosis development. To our knowledge, no study focusing on very low-dose (non-hypolipidemic effect) and long-term atorvastatin treatment in vivo was available. Our aim was to assess the effect of such atorvastatin treatment on the mechanical and functional characteristics of arteries in the context of primary prevention. METHODS An atorvastatin treatment (2.5 mg/kg/day) was tested against controls on 34 male 3 to 12 month-old WHHL rabbits. No effect on total cholesterol, triglycerides, HDL or LDL was observed. The arterial stiffness was evaluated on vigil animals by pulse wave velocity (PWV) measurement. Then, in vitro measurements were made to evaluate (1) the endothelial and vascular smooth muscle function, (2) the elasticity of the arterial wall and (3) the composition in collagen and elastin in the aorta. RESULTS The PWV increasing observed with age in control group was canceled by treatment, creating a significance difference between groups at 12 months (5.17 ± 0.50 vs 2.14 ± 0.34 m s(-1) in control and treated groups respectively). Vasoreactivity modifications can't explain this result but maintain of elasticity with treatment in large arteries was confirm by a static tensile test. A first possible explanation is the change of wall composition with treatment, validated by the percentage of elastin at 12 months, 4.4% lower in the control group compared to the treated group (p < 0.05). CONCLUSIONS This study shows that a non-hypocholesterolemic statin treatment could improve vessel elasticity in the atherosclerotic WHHL model. The great novelty of this work is the vessel wall composition changing associated. This first approach in animal opens the reflection on the use of these low doses in humans. This could be interesting in the context of arterial stiffening with aging, non-hyperlipidemic atherosclerosis or with cholesterol reduce by another therapy or lifestyle modification.
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Affiliation(s)
- Florine Tissier
- EA 4324 ORPHY, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France.
| | - Yassine Mallem
- Université LUNAM, Oniris, UPSP 5304 de Pathophysiologie animale et de Pharmacologie fonctionnelle, Nantes, France
| | - Christelle Goanvec
- EA 4324 ORPHY, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France
| | - Romain Didier
- EA 4324 ORPHY, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France; Département de Cardiologie, CHRU Brest, Brest, France
| | - Thierry Aubry
- LIMATB, Equipe Rhéologie, EA4250 UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France
| | - Nathalie Bourgeois
- Université LUNAM, Oniris, UPSP 5304 de Pathophysiologie animale et de Pharmacologie fonctionnelle, Nantes, France
| | - Jean-Claude Desfontis
- Université LUNAM, Oniris, UPSP 5304 de Pathophysiologie animale et de Pharmacologie fonctionnelle, Nantes, France
| | - Matthieu Dubreuil
- EA 938 LSOL, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France
| | - Yann Le Grand
- EA 938 LSOL, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France
| | - Jacques Mansourati
- EA 4324 ORPHY, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France; Département de Cardiologie, CHRU Brest, Brest, France
| | - Karine Pichavant-Rafini
- EA 4324 ORPHY, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France
| | | | - Philippe Roquefort
- LIMATB, Equipe Rhéologie, EA4250 UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France
| | - Michael Theron
- EA 4324 ORPHY, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France
| | - Martine Gilard
- EA 4324 ORPHY, UBO, UFR Sciences et Techniques, 6 Avenue Victor Le Gorgeu CS 93837, 29238 Brest Cedex 3, France; Département de Cardiologie, CHRU Brest, Brest, France
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