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Schneider B, Kopf KW, Mason E, Dawson M, Coronado Escobar D, Majka SM. Microcomputed tomography visualization and quantitation of the pulmonary arterial microvascular tree in mouse models of chronic lung disease. Pulm Circ 2023; 13:e12279. [PMID: 37645586 PMCID: PMC10461042 DOI: 10.1002/pul2.12279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 08/08/2023] [Accepted: 08/09/2023] [Indexed: 08/31/2023] Open
Abstract
Pulmonary vascular dysfunction is characterized by remodeling and loss of microvessels in the lung and is a major manifestation of chronic lung diseases (CLD). In murine models of CLD, the small arterioles and capillaries are the first and most prevalent vessels that are affected by pruning and remodeling. Thus, visualization of the pulmonary arterial vasculature in three dimensions is essential to define pruning and remodeling both temporally and spatially and its role in the pathogenesis of CLD, aging, and tissue repair. To this end, we have developed a novel method to visualize and quantitate the murine pulmonary arterial circulation using microcomputed tomography (µCT) imaging. Using this perfusion technique, we can quantitate microvessels to approximately 6 µM in diameter. We hypothesize that bleomycin-induced injury would have a significant impact on the arterial vascular structure. As proof of principle, we demonstrated that as a result of bleomycin-induced injury at peak fibrosis, significant alterations in arterial vessel structure were visible in the three-dimensional models as well as quantification. Thus, we have successfully developed a perfusion methodology and complementary analysis techniques, which allows for the reconstruction, visualization, and quantitation of the mouse pulmonary arterial microvasculature in three-dimensions. This tool will further support the examination and understanding of angiogenesis during the development of CLD as well as repair following injury.
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Affiliation(s)
- Ben Schneider
- Department of Medicine, Division of Pulmonary, Critical Care & Sleep MedicineNational Jewish HealthDenverColoradoUSA
| | - Katrina W. Kopf
- Biological Resource CenterNational Jewish HealthDenverColoradoUSA
| | - Emma Mason
- Department of Medicine, Division of Pulmonary, Critical Care & Sleep MedicineNational Jewish HealthDenverColoradoUSA
| | - Maggie Dawson
- Department of Medicine, Division of Pulmonary, Critical Care & Sleep MedicineNational Jewish HealthDenverColoradoUSA
| | | | - Susan M. Majka
- Department of Medicine, Division of Pulmonary, Critical Care & Sleep MedicineNational Jewish HealthDenverColoradoUSA
- Gates Center for Regenerative Medicine and Stem Cell BiologyUniversity of ColoradoAuroraColoradoUSA
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2
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Chen P, Ning X, Li W, Pan Y, Wang L, Li H, Fan X, Zhang J, Luo T, Wu Y, Ou C, Chen M. Fabrication of Tβ4-Exosome-releasing artificial stem cells for myocardial infarction therapy by improving coronary collateralization. Bioact Mater 2022; 14:416-429. [PMID: 35386821 PMCID: PMC8964820 DOI: 10.1016/j.bioactmat.2022.01.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Revised: 01/16/2022] [Accepted: 01/17/2022] [Indexed: 02/06/2023] Open
Abstract
Currently, stem cell transplantations in cardiac repair are limited owing to disadvantages, such as immunological rejection and poor cell viability. Although direct injection of exosomes can have a curative effect similar to that of stem cell transplantation, high clearance hinders its application in clinical practice. Previous reports suggested that induction of coronary collateralization can be a desired method of adjunctive therapy for someone who had missed the optimal operation time to attenuate myocardial ischemia. In this study, to mimic the paracrine and biological activity of stem cells, we developed artificial stem cells that can continuously release Tβ4-exosomes (Tβ4-ASCs) by encapsulating specific exosomes within microspheres using microfluidics technology. The results show that Tβ4-ASCs can greatly promote coronary collateralization in the periphery of the myocardial infarcted area, and its therapeutic effect is superior to that of directly injecting the exosomes. In addition, to better understand how it works, we demonstrated that the Tβ4-ASC-derived exosomes can enhance the angiogenic capacity of coronary endothelial cells (CAECs) via the miR-17-5p/PHD3/Hif-1α pathway. In brief, as artificial stem cells, Tβ4-ASCs can constantly release functional exosomes and stimulate the formation of collateral circulation after myocardial infarction, providing a feasible and alternative method for clinical revascularization. Inspired by the paracrine of stem cells, we fabricated artificial stem cells (Tβ4-ASCs) by loading engineered Tβ4-exosomes with microspheres using microfluidics technology. Tβ4-ASCs stimulate the formation of coronary collateralization in myocardial infarcted area through a slowly sustained release of engineered Tβ4-exosomes. Tβ4-ASCs improve coronary collateralization via the miR-17-5p/PHD3/Hif-1α signaling pathway.
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Affiliation(s)
- Peier Chen
- Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Department of Cardiology and Laboratory of Heart Center, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Zhujiang Hospital, Southern Medical University, Guangzhou, 510280, China
| | - Xiaodong Ning
- Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Department of Cardiology and Laboratory of Heart Center, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Zhujiang Hospital, Southern Medical University, Guangzhou, 510280, China
| | - Weirun Li
- Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Department of Cardiology and Laboratory of Heart Center, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Zhujiang Hospital, Southern Medical University, Guangzhou, 510280, China
| | - Yuxuan Pan
- Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Department of Cardiology and Laboratory of Heart Center, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Zhujiang Hospital, Southern Medical University, Guangzhou, 510280, China
| | - Ling Wang
- Biomaterials Research Center, School of Biomedical Engineering, Southern Medical University, Guangzhou, 510515, China
| | - Hekai Li
- Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Department of Cardiology and Laboratory of Heart Center, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Zhujiang Hospital, Southern Medical University, Guangzhou, 510280, China
| | - Xianglin Fan
- Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Department of Cardiology and Laboratory of Heart Center, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Zhujiang Hospital, Southern Medical University, Guangzhou, 510280, China
| | - Jiexin Zhang
- Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Department of Cardiology and Laboratory of Heart Center, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Zhujiang Hospital, Southern Medical University, Guangzhou, 510280, China
| | - Tiantian Luo
- Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Department of Cardiology and Laboratory of Heart Center, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Zhujiang Hospital, Southern Medical University, Guangzhou, 510280, China
| | - Yaobin Wu
- Guangdong Engineering Research Center for Translation of Medical 3D Printing Application, Guangdong Provincial Key Laboratory of Medical Biomechanics, National Key Discipline of Human Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
- Corresponding author.
| | - Caiwen Ou
- Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Department of Cardiology and Laboratory of Heart Center, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Zhujiang Hospital, Southern Medical University, Guangzhou, 510280, China
- Corresponding author.
| | - Minsheng Chen
- Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Department of Cardiology and Laboratory of Heart Center, Sino-Japanese Cooperation Platform for Translational Research in Heart Failure, Zhujiang Hospital, Southern Medical University, Guangzhou, 510280, China
- Corresponding author.
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3
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miR-29a-3p/THBS2 Axis Regulates PAH-Induced Cardiac Fibrosis. Int J Mol Sci 2021; 22:ijms221910574. [PMID: 34638915 PMCID: PMC8509017 DOI: 10.3390/ijms221910574] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 09/23/2021] [Accepted: 09/26/2021] [Indexed: 12/21/2022] Open
Abstract
Pulmonary artery hypertension (PAH) pathology involves extracellular matrix (ECM) remodeling in cardiac tissues, thus promoting cardiac fibrosis progression. miR-29a-3p reportedly inhibits lung progression and liver fibrosis by regulating ECM protein expression; however, its role in PAH-induced fibrosis remains unclear. In this study, we aimed to investigate the role of miR-29a-3p in cardiac fibrosis progression in PAH and its influence on ECM protein thrombospondin-2 (THBS2) expression. The diagnostic and prognostic values of miR-29a-3p and THBS2 in PAH were evaluated. The expressions and effects of miR-29a-3p and THBS2 were assessed in cell culture, monocrotaline-induced PAH mouse model, and patients with PAH. The levels of circulating miR-29a-3p and THBS2 in patients and mice with PAH decreased and increased, respectively. miR-29a-3p directly targets THBS2 and regulates THBS2 expression via a direct anti-fibrotic effect on PAH-induced cardiac fibrosis. The circulating levels of miR-29a-3p and THBS2 were correlated with PAH diagnostic parameters, suggesting their independent prognostic value. miR-29a-3p targeted THBS2 expression via a direct anti-fibrotic effect on PAH-induced cardiac fibrosis, indicating miR-29a-3p acts as a messenger with promising therapeutic effects.
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Qi Y, Dasa O, Maden M, Vohra R, Batra A, Walter G, Yarrow JF, Aranda JM, Raizada MK, Pepine CJ. Functional heart recovery in an adult mammal, the spiny mouse. Int J Cardiol 2021; 338:196-203. [PMID: 34126132 DOI: 10.1016/j.ijcard.2021.06.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/27/2021] [Accepted: 06/09/2021] [Indexed: 12/22/2022]
Abstract
BACKGROUND Ischemic heart disease and the resulting heart failure continue to carry high morbidity and mortality, and a breakthrough in our understanding of this disorder is needed. The adult spiny mouse (Acomys cahirinus) has evolved the remarkable capacity to regenerate full-thickness skin tissue, including microvasculature and cartilage, without fibrosis or scarring. We hypothesized that lack of scarring and resulting functional regeneration also applies to the adult Acomys heart. METHODS AND RESULTS We compared responses of the Acomys heart to CD1 outbred Mus heart following acute left anterior descending coronary artery ligation to induce myocardial infarction. Both Acomys and Mus hearts showed decreased ejection fraction (EF) after ligation. However, Acomys hearts showed significant EF recovery to pre-ligation values over four weeks. Histological analysis showed comparable infarct area 24-h after ligation with a similar collateral flow in both species' hearts, but subsequently, Acomys displayed reduced infarct size, regenerated microvasculature, and increased cell proliferative activity in the infarcted area. CONCLUSIONS These observations suggest that adult Acomys displays remarkable cardiac recovery properties after acute coronary artery occlusion and may be a useful model to understand functional recovery better. TRANSLATIONAL PERSPECTIVE Adult Acomys provides a novel mammalian model to further investigate the cardioprotective and regenerative signaling mechanisms in adult mammals. This opens the door to breakthrough treatment strategies for the injured myocardium and help millions of patients with heart failure secondary to tissue injury with irreversible damage.
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Affiliation(s)
- Yanfei Qi
- Division of Cardiovascular Medicine, Department of Medicine, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Osama Dasa
- Department of Internal Medicine, University of Florida, Gainesville, FL, USA
| | - Malcolm Maden
- UF Genetics Institute and Department of Biology, University of Florida, Gainesville, FL, USA
| | - Ravneet Vohra
- Department of Physiology and Functional Genomics, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Abhinandan Batra
- Department of Physiology and Functional Genomics, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Glenn Walter
- Department of Physiology and Functional Genomics, College of Medicine, University of Florida, Gainesville, FL, USA
| | | | - Juan M Aranda
- Division of Cardiovascular Medicine, Department of Medicine, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Mohan K Raizada
- Department of Physiology and Functional Genomics, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Carl J Pepine
- Division of Cardiovascular Medicine, Department of Medicine, College of Medicine, University of Florida, Gainesville, FL, USA.
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5
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Echocardiography-guided percutaneous left ventricular intracavitary injection as a cell delivery approach in infarcted mice. Mol Cell Biochem 2021; 476:2135-2148. [PMID: 33547546 DOI: 10.1007/s11010-021-04077-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 01/22/2021] [Indexed: 12/31/2022]
Abstract
In the field of cell therapy for heart disease, a new paradigm of repeated dosing of cells has recently emerged. However, the lack of a repeatable cell delivery method in preclinical studies in rodents is a major obstacle to investigating this paradigm. We have established and standardized a method of echocardiography-guided percutaneous left ventricular intracavitary injection (echo-guided LV injection) as a cell delivery approach in infarcted mice. Here, we describe the method in detail and address several important issues regarding it. First, by integrating anatomical and echocardiographic considerations, we have established strategies to determine a safe anatomical window for injection in infarcted mice. Second, we summarize our experience with this method (734 injections). The overall survival rate was 91.4%. Third, we examined the efficacy of this cell delivery approach. Compared with vehicle treatment, cardiac mesenchymal cells (CMCs) delivered via this method improved cardiac function assessed both echocardiographically and hemodynamically. Furthermore, repeated injections of CMCs via this method yielded greater cardiac function improvement than single-dose administration. Echo-guided LV injection is a feasible, reproducible, relatively less invasive and effective delivery method for cell therapy in murine models of heart disease. It is an important approach that could move the field of cell therapy forward, especially with regard to repeated cell administrations.
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6
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Abstract
The quantitative analysis of blood vessel networks is an important component in many animal models of disease. We describe a nondestructive technique for blood vessel imaging that visualizes in situ vasculature in harvested tissues. The method allows for further analysis of the same tissues with histology and other methods that can be performed on fixed tissue. Consequently, it can easily be incorporated upstream to analysis methods to augment these with a three-dimensional reconstruction of the vascular network in the tissues to be analyzed. The method combines iodine-enhanced micro-computed tomography with a deep learning algorithm to segment vasculature within tissues. The procedure is relatively simple and can provide insight into complex changes in the vascular structure in the tissues.
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7
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The lncRNA H19 alleviates muscular dystrophy by stabilizing dystrophin. Nat Cell Biol 2020; 22:1332-1345. [PMID: 33106653 PMCID: PMC7951180 DOI: 10.1038/s41556-020-00595-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 09/16/2020] [Indexed: 01/04/2023]
Abstract
Dystrophin proteomic regulation in Muscular Dystrophies (MD) remains unclear. We report that a long noncoding RNA (lncRNA), H19, associates with dystrophin and inhibits E3 ligase-dependent poly-ubiquitination at Lys3584 (referred to as Ub-DMD) and its subsequent protein degradation. In-frame deletions in BMD and a DMD non-silent mutation (C3340Y) result in defects in the protein’s ability to interact with H19, causing elevated Ub-DMD levels and dystrophin degradation. Dmd C3333Y mice exhibited progressive muscular dystrophy, elevated serum CK, heart dilation, blood vessel irregularity, and respiratory failure with concurrently reduced dystrophin and increased Ub-DMD status. H19 RNA oligonucleotides conjugated with Agrin (AGR-H19) and Nifenazone competed-with/inhibited TRIM63. Dmd C3333Y animals, iPSC-derived skeletal muscle cells from BMD patients, or mdx mice subjected to exon-skipping exhibited inhibited dystrophin degradation, preserved skeletal/cardiac muscle histology, and improved strength/heart function following AGR-H19 or Nifenazone treatment. Our study paves the way to meaningful targeted therapeutics for BMD and certain DMD patients.
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8
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Knutsen RH, Gober LM, Sukinik JR, Donahue DR, Kronquist EK, Levin MD, McLean SE, Kozel BA. Vascular Casting of Adult and Early Postnatal Mouse Lungs for Micro-CT Imaging. J Vis Exp 2020. [PMID: 32628170 DOI: 10.3791/61242] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Blood vessels form intricate networks in 3-dimensional space. Consequently, it is difficult to visually appreciate how vascular networks interact and behave by observing the surface of a tissue. This method provides a means to visualize the complex 3-dimensional vascular architecture of the lung. To accomplish this, a catheter is inserted into the pulmonary artery and the vasculature is simultaneously flushed of blood and chemically dilated to limit resistance. Lungs are then inflated through the trachea at a standard pressure and the polymer compound is infused into the vascular bed at a standard flow rate. Once the entire arterial network is filled and allowed to cure, the lung vasculature may be visualized directly or imaged on a micro-CT (µCT) scanner. When performed successfully, one can appreciate the pulmonary arterial network in mice ranging from early postnatal ages to adults. Additionally, while demonstrated in the pulmonary arterial bed, this method can be applied to any vascular bed with optimized catheter placement and endpoints.
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Affiliation(s)
- Russell H Knutsen
- Translational Vascular Medicine Branch, National Heart Lung and Blood Institute, National Institutes of Health
| | - Leah M Gober
- Translational Vascular Medicine Branch, National Heart Lung and Blood Institute, National Institutes of Health
| | - Joseph R Sukinik
- Translational Vascular Medicine Branch, National Heart Lung and Blood Institute, National Institutes of Health
| | - Danielle R Donahue
- Mouse Imaging Facility, National Institute of Neurological Disorders and Stroke, National Institutes of Health
| | - Elise K Kronquist
- Translational Vascular Medicine Branch, National Heart Lung and Blood Institute, National Institutes of Health
| | - Mark D Levin
- Translational Vascular Medicine Branch, National Heart Lung and Blood Institute, National Institutes of Health
| | - Sean E McLean
- Division of Pediatric Surgery, Department of Surgery, University of North Carolina at Chapel Hill
| | - Beth A Kozel
- Translational Vascular Medicine Branch, National Heart Lung and Blood Institute, National Institutes of Health;
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9
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Munarin F, Kant RJ, Rupert CE, Khoo A, Coulombe KLK. Engineered human myocardium with local release of angiogenic proteins improves vascularization and cardiac function in injured rat hearts. Biomaterials 2020; 251:120033. [PMID: 32388033 PMCID: PMC8115013 DOI: 10.1016/j.biomaterials.2020.120033] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 04/01/2020] [Accepted: 04/03/2020] [Indexed: 12/27/2022]
Abstract
Heart regeneration after myocardial infarction requires new cardiomyocytes and a supportive vascular network. Here, we evaluate the efficacy of localized delivery of angiogenic factors from biomaterials within the implanted muscle tissue to guide growth of a more dense, organized, and perfused vascular supply into implanted engineered human cardiac tissue on an ischemia/reperfusion injured rat heart. We use large, aligned 3-dimensional engineered tissue with cardiomyocytes derived from human induced pluripotent stem cells in a collagen matrix that contains dispersed alginate microspheres as local protein depots. Release of angiogenic growth factors VEGF and bFGF in combination with morphogen sonic hedgehog from the microspheres into the local microenvironment occurs from the epicardial implant site. Analysis of the 3D vascular network in the engineered tissue via Microfil® perfusion and microCT imaging at 30 days shows increased volumetric network density with a wider distribution of vessel diameters, proportionally increased branching and length, and reduced tortuosity. Global heart function is increased in the angiogenic factor-loaded cardiac implants versus sham. These findings demonstrate for the first time the efficacy of a combined remuscularization and revascularization therapy for heart regeneration after myocardial infarction.
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Affiliation(s)
- Fabiola Munarin
- Center for Biomedical Engineering, Brown University, 184 Hope St, Providence, RI, 02912, USA
| | - Rajeev J Kant
- Center for Biomedical Engineering, Brown University, 184 Hope St, Providence, RI, 02912, USA
| | - Cassady E Rupert
- Center for Biomedical Engineering, Brown University, 184 Hope St, Providence, RI, 02912, USA
| | - Amelia Khoo
- Center for Biomedical Engineering, Brown University, 184 Hope St, Providence, RI, 02912, USA
| | - Kareen L K Coulombe
- Center for Biomedical Engineering, Brown University, 184 Hope St, Providence, RI, 02912, USA.
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Sonic Hedgehog upregulation does not enhance the survival and engraftment of stem cell-derived cardiomyocytes in infarcted hearts. PLoS One 2020; 15:e0227780. [PMID: 31945113 PMCID: PMC6964843 DOI: 10.1371/journal.pone.0227780] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 12/28/2019] [Indexed: 01/02/2023] Open
Abstract
The engraftment of human stem cell-derived cardiomyocytes (hSC-CMs) is a promising treatment for remuscularizing the heart wall post-infarction, but it is plagued by low survival of transplanted cells. We hypothesize that this low survival rate is due to continued ischemia within the infarct, and that increasing the vascularization of the scar will ameliorate the ischemia and improve hSC-CM survival and engraftment. An adenovirus expressing the vascular growth factor Sonic Hedgehog (Shh) was injected into the infarcted myocardium of rats immediately after ischemia/reperfusion, four days prior to hSC-CM injection. By two weeks post-cell injection, Shh treatment had successfully increased capillary density outside the scar, but not within the scar. In addition, there was no change in vessel size or percent vascular volume when compared to cell injection alone. Micro-computed tomography revealed that Shh failed to increase the number and size of larger vessels. It also had no effect on graft size or heart function when compared to cell engraftment alone. Our data suggests that, when combined with the engraftment of hSC-CMs, expression of Shh within the infarct scar and surrounding myocardium is unable to increase vascularization of the infarct scar, and it does not improve survival or function of hSC-CM grafts.
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11
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Aicher BO, Mukhopadhyay S, Lu X, Muratoglu SC, Strickland DK, Ucuzian AA. Quantitative Micro-CT Analysis of Aortopathy in a Mouse Model of β-aminopropionitrile-induced Aortic Aneurysm and Dissection. J Vis Exp 2018. [PMID: 30059027 DOI: 10.3791/57589] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Aortic aneurysm and dissection is associated with significant morbidity and mortality in the population and can be highly lethal. While animal models of aortic disease exist, in vivo imaging of the vasculature has been limited. In recent years, micro-computerized tomography (micro-CT) has emerged as a preferred modality for imaging both large and small vessels both in vivo and ex vivo. In conjunction with a method of vascular casting, we have successfully used micro-CT to characterize the frequency and distribution of aortic pathology in β-aminopropionitrile-treated C57/Bl6 mice. Technical limitations of this method include variations in the quality of the perfusion introduced by poor animal preparation, the application of proper methodologies for vessel size quantification, and the non-survivability of this procedure. This article details a methodology for the intravascular perfusion of a lead-based radiopaque silicone rubber for the quantitative characterization of aortopathy in a mouse model of aneurysm and dissection. In addition to visualizing aortic pathology, this method may be used for examining other vascular beds in vivo or vascular beds removed post-mortem.
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Affiliation(s)
- Brittany O Aicher
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine;
| | - Subhradip Mukhopadhyay
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine
| | - Xin Lu
- Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland School of Medicine
| | - Selen C Muratoglu
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine
| | - Dudley K Strickland
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine
| | - Areck A Ucuzian
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine; Division of Vascular Surgery, University of Maryland School of Medicine
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12
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Aicher BO, Mukhopadhyay S, Lu X, Muratoglu SC, Strickland DK, Ucuzian AA. Quantitative Micro-CT Analysis of Aortopathy in a Mouse Model of β-aminopropionitrile-induced Aortic Aneurysm and Dissection. J Vis Exp 2018:57589. [PMID: 30059027 PMCID: PMC6126473 DOI: 10.3791/57589 10.3791/57589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
Abstract
Aortic aneurysm and dissection is associated with significant morbidity and mortality in the population and can be highly lethal. While animal models of aortic disease exist, in vivo imaging of the vasculature has been limited. In recent years, micro-computerized tomography (micro-CT) has emerged as a preferred modality for imaging both large and small vessels both in vivo and ex vivo. In conjunction with a method of vascular casting, we have successfully used micro-CT to characterize the frequency and distribution of aortic pathology in β-aminopropionitrile-treated C57/Bl6 mice. Technical limitations of this method include variations in the quality of the perfusion introduced by poor animal preparation, the application of proper methodologies for vessel size quantification, and the non-survivability of this procedure. This article details a methodology for the intravascular perfusion of a lead-based radiopaque silicone rubber for the quantitative characterization of aortopathy in a mouse model of aneurysm and dissection. In addition to visualizing aortic pathology, this method may be used for examining other vascular beds in vivo or vascular beds removed post-mortem.
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Affiliation(s)
- Brittany O Aicher
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine;
| | - Subhradip Mukhopadhyay
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine
| | - Xin Lu
- Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland School of Medicine
| | - Selen C Muratoglu
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine
| | - Dudley K Strickland
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine
| | - Areck A Ucuzian
- Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine; Division of Vascular Surgery, University of Maryland School of Medicine
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13
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Arima Y, Hokimoto S, Tabata N, Nakagawa O, Oshima A, Matsumoto Y, Sato T, Mukunoki T, Otani J, Ishii M, Uchikawa M, Yamamoto E, Izumiya Y, Kaikita K, Ogawa H, Nishiyama K, Tsujita K. Evaluation of Collateral Source Characteristics With 3-Dimensional Analysis Using Micro-X-Ray Computed Tomography. J Am Heart Assoc 2018; 7:JAHA.117.007800. [PMID: 29572323 PMCID: PMC5907550 DOI: 10.1161/jaha.117.007800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Collateral arteries provide an alternative blood supply and protect tissues from ischemic damage in patients with peripheral artery disease. However, the mechanism of collateral artery development is difficult to validate. METHODS AND RESULTS Collateral arteries were visualized using micro-x-ray computed tomography. Developmental characteristics were assessed using confocal microscopy. We conducted a single-center, retrospective, observational study and assessed the dilatation of collateral arteries on ischemic sides. We quantified the vascular volume in both ischemic and nonischemic legs. A prominent increase in vascular volume was observed in the ischemic leg using a murine hind-limb ischemia model. We also performed qualitative assessment and confirmed that the inferior gluteal artery functioned as a major collateral source. Serial analysis of murine hind-limb vessel development revealed that the inferior gluteal artery was a remnant of the ischial artery, which emerged as a representative vessel on the dorsal side during hind-limb organogenesis. We retrospectively analyzed consecutive patients who were admitted for the diagnosis or treatment of peripheral artery disease. The diameter of the inferior gluteal artery on the ischemic side showed significant dilatation compared with that on the nonischemic side. CONCLUSIONS Our findings indicate that an embryonic remnant artery can become a collateral source under ischemic conditions. Flow enhancement in the inferior gluteal artery might become a novel therapeutic approach for patients with peripheral artery disease.
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Affiliation(s)
- Yuichiro Arima
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan .,X-Earth Center, Faculty of Engineering, Kumamoto University, Kumamoto, Japan.,International Research Center for Medical Sciences, Kumamoto, Japan.,Department of Molecular Physiology, National Cerebral and Cardiovascular Research Center Research Institute, Suita, Osaka, Japan
| | - Seiji Hokimoto
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan.,X-Earth Center, Faculty of Engineering, Kumamoto University, Kumamoto, Japan.,Kyushu University of Nursing and Social Welfare, Kumamoto, Japan
| | - Noriaki Tabata
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Osamu Nakagawa
- Department of Molecular Physiology, National Cerebral and Cardiovascular Research Center Research Institute, Suita, Osaka, Japan
| | - Asahi Oshima
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Yosuke Matsumoto
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Takahiro Sato
- X-Earth Center, Faculty of Engineering, Kumamoto University, Kumamoto, Japan
| | - Toshifumi Mukunoki
- X-Earth Center, Faculty of Engineering, Kumamoto University, Kumamoto, Japan
| | - Jun Otani
- X-Earth Center, Faculty of Engineering, Kumamoto University, Kumamoto, Japan
| | - Masanobu Ishii
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Michie Uchikawa
- International Research Center for Medical Sciences, Kumamoto, Japan
| | - Eiichiro Yamamoto
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Yasuhiro Izumiya
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Koichi Kaikita
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Hisao Ogawa
- National Cerebral and Cardiovascular Research Center Research Institute, Suita, Osaka, Japan
| | - Koichi Nishiyama
- International Research Center for Medical Sciences, Kumamoto, Japan
| | - Kenichi Tsujita
- Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
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14
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Epah J, Pálfi K, Dienst FL, Malacarne PF, Bremer R, Salamon M, Kumar S, Jo H, Schürmann C, Brandes RP. 3D Imaging and Quantitative Analysis of Vascular Networks: A Comparison of Ultramicroscopy and Micro-Computed Tomography. Theranostics 2018; 8:2117-2133. [PMID: 29721067 PMCID: PMC5928875 DOI: 10.7150/thno.22610] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 01/30/2018] [Indexed: 12/18/2022] Open
Abstract
Rationale: Classic histology is the gold standard for vascular network imaging and analysis. The method however is laborious and prone to artefacts. Here, the suitability of ultramicroscopy (UM) and micro-computed tomography (CT) was studied to establish potential alternatives to histology. Methods: The vasculature of murine organs (kidney, heart and atherosclerotic carotid arteries) was visualized using conventional 2D microscopy, 3D light sheet ultramicroscopy (UM) and micro-CT. Moreover, spheroid-based human endothelial cell vessel formation in mice was quantified. Fluorescently labeled Isolectin GS-IB4 A647 was used for in vivo labeling of vasculature for UM analysis, and analyses were performed ex vivo after sample preparation. For CT imaging, animals were perfused postmortem with radiopaque contrast agent. Results: Using UM imaging, 3D vascular network information could be obtained in samples of animals receiving in vivo injection of the fluorescently labeled Isolectin GS-IB4. Resolution was sufficient to measure single endothelial cell integration into capillaries in the spheroid-based matrigel plug assay. Because of the selective staining of the endothelium, imaging of larger vessels yielded less favorable results. Using micro-CT or even nano-CT, imaging of capillaries was impossible due to insufficient X-ray absorption and thus insufficient signal-to-noise ratio. Identification of lumen in murine arteries using micro-CT was in contrast superior to UM. Conclusion: UM and micro-CT are two complementary techniques. Whereas UM is ideal for imaging and especially quantifying capillary networks and arterioles, larger vascular structures are easier and faster to quantify and visualize using micro-CT. 3D information of both techniques is superior to 2D histology. UM and micro-CT together may open a new field of clinical pathology diagnosis.
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15
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Mancini M, Greco A, Tedeschi E, Palma G, Ragucci M, Bruzzone MG, Coda ARD, Torino E, Scotti A, Zucca I, Salvatore M. Head and Neck Veins of the Mouse. A Magnetic Resonance, Micro Computed Tomography and High Frequency Color Doppler Ultrasound Study. PLoS One 2015; 10:e0129912. [PMID: 26067061 PMCID: PMC4466257 DOI: 10.1371/journal.pone.0129912] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 05/14/2015] [Indexed: 11/19/2022] Open
Abstract
To characterize the anatomy of the venous outflow of the mouse brain using different imaging techniques. Ten C57/black male mice (age range: 7-8 weeks) were imaged with high-frequency Ultrasound, Magnetic Resonance Angiography and ex-vivo Microcomputed tomography of the head and neck. Under general anesthesia, Ultrasound of neck veins was performed with a 20MHz transducer; head and neck Magnetic Resonance Angiography data were collected on 9.4T or 7T scanners, and ex-vivo Microcomputed tomography angiography was obtained by filling the vessels with a radiopaque inert silicone rubber compound. All procedures were approved by the local ethical committee. The dorsal intracranial venous system is quite similar in mice and humans. Instead, the mouse Internal Jugular Veins are tiny vessels receiving the sigmoid sinuses and tributaries from cerebellum, occipital lobe and midbrain, while the majority of the cerebral blood, i.e. from the olfactory bulbs and fronto-parietal lobes, is apparently drained through skull base connections into the External Jugular Vein. Three main intra-extracranial anastomoses, absent in humans, are: 1) the petrosquamous sinus, draining into the posterior facial vein, 2) the veins of the olfactory bulb, draining into the superficial temporal vein through a foramen of the frontal bone 3) the cavernous sinus, draining in the External Jugular Vein through a foramen of the sphenoid bone. The anatomical structure of the mouse cranial venous outflow as depicted by Ultrasound, Microcomputed tomography and Magnetic Resonance Angiography is different from humans, with multiple connections between intra- and extra- cranial veins.
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Affiliation(s)
- Marcello Mancini
- Institute of Biostructures and Bioimaging, National Research Council, Naples, Italy
- * E-mail:
| | - Adelaide Greco
- Department of Advanced Biomedical Sciences, University “Federico II”, Naples, Italy
- CEINGE-Biotecnologie Avanzate, Naples, Italy
| | - Enrico Tedeschi
- Department of Advanced Biomedical Sciences, University “Federico II”, Naples, Italy
| | - Giuseppe Palma
- Institute of Biostructures and Bioimaging, National Research Council, Naples, Italy
| | - Monica Ragucci
- Department of Advanced Biomedical Sciences, University “Federico II”, Naples, Italy
| | - Maria Grazia Bruzzone
- Unit of Neuroradiology, IRCCS Foundation “Carlo Besta” Neurological Institute, Milan, Italy
| | | | - Enza Torino
- Center for Advanced Biomaterials for Health Care@CRIB, Istituto Italiano di Tecnologia, Naples, Italy
| | - Alessandro Scotti
- Scientific Direction, IRCCS Foundation "Carlo Besta" Neurological Institute, Milan, Italy
| | - Ileana Zucca
- Scientific Direction, IRCCS Foundation "Carlo Besta" Neurological Institute, Milan, Italy
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16
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Weyers JJ, Schwartz SM, Minami E, Carlson DD, Dupras SK, Weitz K, Simons M, Cox TC, Murry CE, Mahoney WM. Effects of cell grafting on coronary remodeling after myocardial infarction. J Am Heart Assoc 2013; 2:e000202. [PMID: 23723253 PMCID: PMC3698786 DOI: 10.1161/jaha.113.000202] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
BACKGROUND With recent advances in therapeutic applications of stem cells, cell engraftment has become a promising therapy for replacing injured myocardium after infarction. The survival and function of injected cells, however, will depend on the efficient vascularization of the new tissue. Here we describe the arteriogenic remodeling of the coronary vessels that supports vascularization of engrafted tissue postmyocardial infarction (post-MI). METHODS AND RESULTS Following MI, murine hearts were injected with a skeletal myoblast cell line previously shown to develop into large grafts. Microcomputed tomography at 28 days postengraftment revealed the 3-dimensional structure of the newly formed conducting vessels. The grafts elicited both an angiogenic response and arteriogenic remodeling of the coronary arteries to perfuse the graft. The coronaries upstream of the graft also remodeled, showing an increase in branching, and a decrease in vascular density. Histological analysis revealed the presence of capillaries as well as larger vascular lumens within the graft. Some graft vessels were encoated by smooth muscle α-actin positive cells, implying that vascular remodeling occurs at both the conducting arterial and microvascular levels. CONCLUSIONS Following MI and skeletal myoblast engraftment, the murine coronary vessels exhibit plasticity that enables both arteriogenic remodeling of the preexisting small branches of the coronary arteries and development of large and small smooth muscle encoated vessels within the graft. Understanding the molecular mechanisms underlying these 2 processes suggests mechanisms to enhance the therapeutic vascularization in patients with myocardial ischemia.
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Affiliation(s)
- Jill J Weyers
- Department of Pathology, Center for Cardiovascular Biology and Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA
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