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Image-guided in situ cancer vaccination with combination of multi-functional nano-adjuvant and an irreversible electroporation technique. Biomaterials 2022; 289:121762. [DOI: 10.1016/j.biomaterials.2022.121762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 08/16/2022] [Accepted: 08/21/2022] [Indexed: 11/19/2022]
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2
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Sarathkumar E, Victor M, Menon JA, Jibin K, Padmini S, Jayasree RS. Nanotechnology in cardiac stem cell therapy: cell modulation, imaging and gene delivery. RSC Adv 2021; 11:34572-34588. [PMID: 35494731 PMCID: PMC9043027 DOI: 10.1039/d1ra06404e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 10/04/2021] [Indexed: 12/11/2022] Open
Abstract
The wide arena of applications opened by nanotechnology is multidimensional. It is already been proven that its prominence can continuously influence human life. The role of stem cells in curing degenerative diseases is another major area of research. Cardiovascular diseases are one of the major causes of death globally. Nanotechnology-assisted stem cell therapy could be used to tackle the challenges faced in the management of cardiovascular diseases. In spite of the positive indications and proven potential of stem cells to differentiate into cardiomyocytes for cardiac repair and regeneration during myocardial infarction, this therapeutic approach still remains in its infancy due to several factors such as non-specificity of injected cells, insignificant survival rate, and low cell retention. Attempts to improve stem cell therapy using nanoparticles have shown some interest among researchers. This review focuses on the major hurdles associated with cardiac stem cell therapy and the role of nanoparticles to overcome the major challenges in this field, including cell modulation, imaging, tracking and gene delivery. This review summarizes the potential challenges present in cardiac stem cell therapy and the major role of nanotechnology to overcome these challenges including cell modulation, tracking and imaging of stem cells.![]()
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Affiliation(s)
- Elangovan Sarathkumar
- Division of Biophotonics and Imaging, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Biomedical Technology Wing Trivandrum India
| | - Marina Victor
- Division of Biophotonics and Imaging, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Biomedical Technology Wing Trivandrum India
| | | | - Kunnumpurathu Jibin
- Division of Biophotonics and Imaging, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Biomedical Technology Wing Trivandrum India
| | - Suresh Padmini
- Sree Narayana Institute of Medical Sciences Kochi Kerala India
| | - Ramapurath S Jayasree
- Division of Biophotonics and Imaging, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Biomedical Technology Wing Trivandrum India
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Tanimoto Y, Yamasaki T, Nagoshi N, Nishiyama Y, Nori S, Nishimura S, Iida T, Ozaki M, Tsuji O, Ji B, Aoki I, Jinzaki M, Matsumoto M, Fujibayashi Y, Zhang MR, Nakamura M, Okano H. In vivo monitoring of remnant undifferentiated neural cells following human induced pluripotent stem cell-derived neural stem/progenitor cells transplantation. Stem Cells Transl Med 2020; 9:465-477. [PMID: 31904914 PMCID: PMC7103627 DOI: 10.1002/sctm.19-0150] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Accepted: 11/30/2019] [Indexed: 12/16/2022] Open
Abstract
Transplantation of human-induced pluripotent stem cell-derived neural stem/progenitor cells (hiPSC-NS/PCs) is a promising treatment for a variety of neuropathological conditions. Although previous reports have indicated the effectiveness of hiPSC-NS/PCs transplantation into the injured spinal cord of rodents and nonhuman primates, long-term observation of hiPSC-NS/PCs post-transplantation suggested some "unsafe" differentiation-resistant properties, resulting in disordered overgrowth. These findings suggest that, even if "safe" NS/PCs are transplanted into the human central nervous system (CNS), the dynamics of cellular differentiation of stem cells should be noninvasively tracked to ensure safety. Positron emission tomography (PET) provides molecular-functional information and helps to detect specific disease conditions. The current study was conducted to visualize Nestin (an NS/PC marker)-positive undifferentiated neural cells in the CNS of immune-deficient (nonobese diabetic-severe combined immune-deficient) mice after hiPSC-NS/PCs transplantation with PET, using 18 kDa translocator protein (TSPO) ligands as labels. TSPO was recently found to be expressed in rodent NS/PCs, and its expression decreased with the progression of neuronal differentiation. We hypothesized that TSPO would also be present in hiPSC-NS/PCs and expressed strongly in residual immature neural cells after transplantation. The results showed high levels of TSPO expression in immature hiPSC-NS/PCs-derived cells, and decreased TSPO expression as neural differentiation progressed in vitro. Furthermore, PET with [18 F] FEDAC (a TSPO radioligand) was able to visualize the remnant undifferentiated hiPSC-NS/PCs-derived cells consisting of TSPO and Nestin+ cells in vivo. These findings suggest that PET with [18 F] FEDAC could play a key role in the safe clinical application of CNS repair in regenerative medicine.
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Affiliation(s)
- Yuji Tanimoto
- Department of Physiology, Keio University School of Medicine, Tokyo, Japan
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
- Department of Advanced Nuclear Medicine Sciences, National Institute of Radiological Sciences, Quantum Medical Science Directorate, National Institutes for Quantum and Radiological Science and Technology (QST), Chiba, Japan
| | - Tomoteru Yamasaki
- Department of Advanced Nuclear Medicine Sciences, National Institute of Radiological Sciences, Quantum Medical Science Directorate, National Institutes for Quantum and Radiological Science and Technology (QST), Chiba, Japan
| | - Narihito Nagoshi
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Yuichiro Nishiyama
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Satoshi Nori
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Soraya Nishimura
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Tsuyoshi Iida
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Masahiro Ozaki
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Osahiko Tsuji
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Bin Ji
- Department of Functional Brain Imaging, National Institute of Radiological Sciences, Quantum Medical Science Directorate, National Institutes for Quantum and Radiological Science and Technology (QST), Chiba, Japan
| | - Ichio Aoki
- Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology (QST), Chiba, Japan
| | - Masahiro Jinzaki
- Department of Radiology, Keio University School of Medicine, Tokyo, Japan
| | - Morio Matsumoto
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Yasuhisa Fujibayashi
- Department of Advanced Nuclear Medicine Sciences, National Institute of Radiological Sciences, Quantum Medical Science Directorate, National Institutes for Quantum and Radiological Science and Technology (QST), Chiba, Japan
- Department of Radiology, Keio University School of Medicine, Tokyo, Japan
| | - Ming-Rong Zhang
- Department of Advanced Nuclear Medicine Sciences, National Institute of Radiological Sciences, Quantum Medical Science Directorate, National Institutes for Quantum and Radiological Science and Technology (QST), Chiba, Japan
| | - Masaya Nakamura
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Hideyuki Okano
- Department of Physiology, Keio University School of Medicine, Tokyo, Japan
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4
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Constantinides C. Is There Preclinical and Clinical Value for 19F MRI in Stem Cell Cardiac Regeneration? Cell Transplant 2020; 29:963689720954434. [PMID: 33000632 PMCID: PMC7784514 DOI: 10.1177/0963689720954434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 07/05/2020] [Accepted: 08/12/2020] [Indexed: 11/24/2022] Open
Abstract
Cardiovascular regeneration aims to renew damaged or necrotic tissue and to enhance cardiac functional performance. Despite the hope arisen from the introduction and use of stem cells (SCs) as a novel cardiac regenerative approach, to-this-date, clinical trial findings are still ambivalent despite preclinical successes. Concurrently, noninvasive magnetic resonance imaging (MRI) advances have been based on nanotechnological breakthroughs that have (a) allowed fluorinated nanoparticles and ultrasmall iron oxide single-cell labeling, (b) explored imaging detection sensitivity limits (for preclinical/low-field clinical settings), and (c) accomplished cellular tracking in vivo. Nevertheless, outcomes have been far from ideal. Herein, the recently developed preclinical and clinical 1H and 19F MRI approaches for direct cardiac SC labeling techniques intended for cellular implantation and their potential for tracking these cells in health and infarcted states are summarized. To this extent, the potential preclinical and clinical values of 19F MRI and tracking of SCs for cardiac regeneration in myocardial infarction are questioned and challenged.
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In Vivo MRI Tracking of Mesenchymal Stromal Cells Labeled with Ultrasmall Paramagnetic Iron Oxide Particles after Intramyocardial Transplantation in Patients with Chronic Ischemic Heart Disease. Stem Cells Int 2019; 2019:2754927. [PMID: 31814830 PMCID: PMC6877937 DOI: 10.1155/2019/2754927] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Accepted: 09/28/2019] [Indexed: 01/17/2023] Open
Abstract
Background While regenerative stem cell therapy for ischemic heart disease has moved into phase 3 studies, little is still known about retention and migration of cell posttransplantation. In human studies, the ability to track transplanted cells has been limited to labeling with radioisotopes and tracking using nuclear imaging. This method is limited by low resolution and short half-lives of available radioisotopes. Longitudinal tracking using magnetic resonance imaging (MRI) of myocardial injected cells labeled with iron oxide nanoparticles has shown promising results in numerous preclinical studies but has yet to be evaluated in human studies. We aimed to evaluate MRI tracking of mesenchymal stromal cells (MSCs) labeled with ultrasmall paramagnetic iron oxide (USPIO) nanoparticles after intramyocardial transplantation in patients with ischemic heart disease (IHD). Methods Five no-option patients with chronic symptomatic IHD underwent NOGA-guided intramyocardial transplantation of USPIO-labeled MSCs. Serial MRI scans were performed to track labeled cells both visually and using semiautomated T2∗ relaxation time analysis. For safety, we followed symptoms, quality of life, and myocardial function for 6 months. Results USPIO-labeled MSCs were tracked for up to 14 days after transplantation at injection sites both visually and using semiautomated regional T2∗ relaxation time analysis. Labeling of MSCs did not impair long-term safety of treatment. Conclusion This was a first-in-man clinical experience aimed at evaluating the utility of MRI tracking of USPIO-labeled bone marrow-derived autologous MSCs after intramyocardial injection in patients with chronic IHD. The treatment was safe, and cells were detectable at injection sites up to 14 days after transplantation. Further studies are needed to clarify if MSCs migrate out of the injection area into other areas of the myocardium or if injected cells are washed out into the peripheral circulation. The trial is registered with ClinicalTrials.gov NCT03651791.
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Davis DR. Paracrine Heart Repair Comes of Age. Can J Cardiol 2019; 35:1278-1280. [PMID: 31601411 DOI: 10.1016/j.cjca.2019.07.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 07/07/2019] [Accepted: 07/07/2019] [Indexed: 11/29/2022] Open
Affiliation(s)
- Darryl R Davis
- University of Ottawa Heart Institute, Division of Cardiology, Department of Medicine, University of Ottawa, Ottawa, Ontario, Canada.
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Che W, Zhang L, Li Y, Zhu D, Xie Z, Li G, Zhang P, Su Z, Dou C, Tang BZ. Ultrafast and Noninvasive Long-Term Bioimaging with Highly Stable Red Aggregation-Induced Emission Nanoparticles. Anal Chem 2019; 91:3467-3474. [PMID: 30693764 DOI: 10.1021/acs.analchem.8b05024] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Strongly red luminescent and water-soluble probes are very important for studying biological events and processes. Fluorescent nanoparticles (NPs) built from the aggregation-induced emission luminogen (AIEgen) and amphipathic polymeric matrixes have been considered as promising candidates for bioimaging. However, AIE NPs with long-wavelength absorption suitable for in vivo application are still scarce. In this work, three AIE-active red-emissive BODIPY derivatives with long-wavelength absorption were rationally designed and synthesized. Then three NPs based on these AIEgens exhibit bright red photoluminescence with high fluorescence quantum yield in aqueous media. These NPs uniformly dispersed in water and showed excellent stability and good biocompatibility. They can be readily internalized by HeLa cells, and the staining process is performed by simply shaking the culture with cells for just a few seconds at room temperature, which indicates an ultrafast and easy-to-operate staining protocol. More importantly, long-term tracing in living cells and mouse over 15 days is successfully achieved. The strong fluorescence signals, ultrafast staining procedure, and long-term tracing abilities indicate that these AIE NPs hold great potential for monitoring biological processes.
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Affiliation(s)
- Weilong Che
- Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province, Department of Chemistry , Northeast Normal University , 5268 Renmin Street , Changchun , Jilin Province 130024 , P. R. China
| | - Liping Zhang
- Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province, Department of Chemistry , Northeast Normal University , 5268 Renmin Street , Changchun , Jilin Province 130024 , P. R. China
| | - Yuanyuan Li
- State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry Chinese Academy of Sciences , Changchun , 130022 , P. R. China
| | - Dongxia Zhu
- Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province, Department of Chemistry , Northeast Normal University , 5268 Renmin Street , Changchun , Jilin Province 130024 , P. R. China
| | - Zhigang Xie
- State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry Chinese Academy of Sciences , Changchun , 130022 , P. R. China
| | - Guangfu Li
- Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province, Department of Chemistry , Northeast Normal University , 5268 Renmin Street , Changchun , Jilin Province 130024 , P. R. China
| | - Pengfei Zhang
- Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction , The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon , Hong Kong , China
| | - Zhongmin Su
- Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province, Department of Chemistry , Northeast Normal University , 5268 Renmin Street , Changchun , Jilin Province 130024 , P. R. China
- School of Chemistry and Environmental Engineering , Changchun University of Science and Technology , Changchun , 130022 , P. R. China
| | - Chuandong Dou
- State Key Laboratory of Polymer Physics and Chemistry , Changchun Institute of Applied Chemistry Chinese Academy of Sciences , Changchun , 130022 , P. R. China
| | - Ben Zhong Tang
- Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction , The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon , Hong Kong , China
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Li H, Xu H, Wen H, Liu T, Sun Y, Xiao N, Bai C, Ge J, Wang X, Song L, Song Y, Zhang Y, Chen J. Overexpression of LH3 reduces the incidence of hypertensive intracerebral hemorrhage in mice. J Cereb Blood Flow Metab 2019; 39:547-561. [PMID: 30516406 PMCID: PMC6421250 DOI: 10.1177/0271678x18815791] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Hypertensive intracerebral hemorrhage (ICH) is a devastating cerebrovascular disease with no effective treatment. Lysyl hydroxylase 3 (LH3) is essential for collagen IV intermolecular crosslinking and stabilization. Deficiency in LH3 affects the assembly and secretion of collagen IV and basement membrane (BM) integrity of vessels. Here, we investigated whether LH3 has significant implications for disease progression and therapeutic intervention. Spontaneous hypertensive ICH of mice was induced by angiotensin II and L-NAME treatment. The adeno-associated virus was delivered into brain by stereotactic injection to knockdown or overexpress LH3. We found LH3 levels were reduced in human patients with ICH and gradually decreased in mice before ICH. LH3 knockdown increased the incidence of hypertensive ICH in mice. The incidence, number, and size of ICHs in mice were markedly reduced by LH3 overexpression. RNA-seq revealed that LH3 overexpression significantly reversed the profound alterations in gene transcriptional profiles of cerebral vessels. LH3 overexpression was sufficient to enhance BM integrity, inhibit matrix metalloproteinase activity, attenuate microglial activation and leukocyte infiltration, and reduce VSMC apoptosis before ICH. These results indicate that LH3 overexpression attenuates susceptibility to hypertensive ICH. We emphasize that LH3 modulation may serve as a viable approach for future investigations of ICH prevention.
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Affiliation(s)
- Hao Li
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Haochen Xu
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Hongyan Wen
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Tianlong Liu
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yingying Sun
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Ning Xiao
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Congxia Bai
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Jing Ge
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xuliang Wang
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Li Song
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yan Song
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yinhui Zhang
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Jingzhou Chen
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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Kobes JE, Georgiev GI, Louis AV, Calderon IA, Yoshimaru ES, Klemm LM, Cromey DW, Khalpey Z, Pagel MD. A Comparison of Iron Oxide Particles and Silica Particles for Tracking Organ Recellularization. Mol Imaging 2018; 17:1536012118787322. [PMID: 30039729 PMCID: PMC6058421 DOI: 10.1177/1536012118787322] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Reseeding of decellularized organ scaffolds with a patient’s own cells has promise for eliminating graft versus host disease. This study investigated whether ultrasound imaging or magnetic resonance imaging (MRI) can track the reseeding of murine liver scaffolds with silica-labeled or iron-labeled liver hepatocytes. Mesoporous silica particles were created using the Stöber method, loaded with Alexa Flour 647 fluorophore, and conjugated with protamine sulfate, glutamine, and glycine. Fluorescent iron oxide particles were obtained from a commercial source. Liver cells from donor mice were loaded with the silica particles or iron oxide particles. Donor livers were decellularized and reperfused with silica-labeled or iron-labeled cells. The reseeded livers were longitudinally analyzed with ultrasound imaging and MRI. Liver biopsies were imaged with confocal microscopy and scanning electron microscopy. Ultrasound imaging had a detection limit of 0.28 mg/mL, while MRI had a lower detection limit of 0.08 mg/mL based on particle weight. The silica-loaded cells proliferated at a slower rate compared to iron-loaded cells. Ultrasound imaging, MRI, and confocal microscopy underestimated cell numbers relative to scanning electron microscopy. Ultrasound imaging had the greatest underestimation due to coarse resolution compared to the other imaging modalities. Despite this underestimation, both ultrasound imaging and MRI successfully tracked the longitudinal recellularization of liver scaffolds.
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Affiliation(s)
- Joseph E Kobes
- 1 Department of Biomedical Engineering, University of Arizona, Tucson, AZ, USA.,2 Department of Chemistry and Life Science, United States Military Academy, West Point, NY, USA
| | - George I Georgiev
- 1 Department of Biomedical Engineering, University of Arizona, Tucson, AZ, USA
| | - Anthony V Louis
- 3 Department of Surgery, University of Arizona, Tucson, AZ, USA
| | - Isen A Calderon
- 4 Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ, USA
| | - Eriko S Yoshimaru
- 1 Department of Biomedical Engineering, University of Arizona, Tucson, AZ, USA
| | - Louie M Klemm
- 3 Department of Surgery, University of Arizona, Tucson, AZ, USA
| | - Douglas W Cromey
- 5 University of Arizona Cancer Center, University of Arizona, Tucson, AZ, USA
| | - Zain Khalpey
- 3 Department of Surgery, University of Arizona, Tucson, AZ, USA
| | - Mark D Pagel
- 1 Department of Biomedical Engineering, University of Arizona, Tucson, AZ, USA.,4 Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ, USA.,5 University of Arizona Cancer Center, University of Arizona, Tucson, AZ, USA
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Saeed M, Liu H, Liang CH, Wilson MW. Magnetic resonance imaging for characterizing myocardial diseases. Int J Cardiovasc Imaging 2017; 33:1395-1414. [PMID: 28364177 DOI: 10.1007/s10554-017-1127-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 03/23/2017] [Indexed: 12/21/2022]
Abstract
The National Institute of Health defined cardiomyopathy as diseases of the heart muscle. These myocardial diseases have different etiology, structure and treatment. This review highlights the key imaging features of different myocardial diseases. It provides information on myocardial structure/orientation, perfusion, function and viability in diseases related to cardiomyopathy. The standard cardiac magnetic resonance imaging (MRI) sequences can reveal insight on left ventricular (LV) mass, volumes and regional contractile function in all types of cardiomyopathy diseases. Contrast enhanced MRI sequences allow visualization of different infarct patterns and sizes. Enhancement of myocardial inflammation and infarct (location, transmurality and pattern) on contrast enhanced MRI have been used to highlight the key differences in myocardial diseases, predict recovery of function and healing. The common feature in many forms of cardiomyopathy is the presence of diffuse-fibrosis. Currently, imaging sequences generating the most interest in cardiomyopathy include myocardial strain analysis, tissue mapping (T1, T2, T2*) and extracellular volume (ECV) estimation techniques. MRI sequences have the potential to decode the etiology by showing various patterns of infarct and diffuse fibrosis in myocarditis, amyloidosis, sarcoidosis, hypertrophic cardiomyopathy due to aortic stenosis, restrictive cardiomyopathy, arrythmogenic right ventricular dysplasia and hypertension. Integrated PET/MRI system may add in the future more information for the diagnosis and progression of cardiomyopathy diseases. With the promise of high spatial/temporal resolution and 3D coverage, MRI will be an indispensible tool in diagnosis and monitoring the benefits of new therapies designed to treat myocardial diseases.
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Affiliation(s)
- Maythem Saeed
- Department of Radiology and Biomedical Imaging, School of Medicine, University of California San Francisco, 185 Berry Street, Suite 350, Campus Box 0946, San Francisco, CA, 94107-5705, USA.
| | - Hui Liu
- Department of Radiology, Guangdong General Hospital, Guangzhou, China
| | - Chang-Hong Liang
- Department of Radiology, Guangdong General Hospital, Guangzhou, China
| | - Mark W Wilson
- Department of Radiology and Biomedical Imaging, School of Medicine, University of California San Francisco, 185 Berry Street, Suite 350, Campus Box 0946, San Francisco, CA, 94107-5705, USA
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Wallace VJ, Cimbro R, Rubio FJ, Fortuno LV, Necarsulmer JC, Koivula PP, Henderson MJ, DeBiase LM, Warren BL, Harvey BK, Hope BT. Neurons Internalize Functionalized Micron-Sized Silicon Dioxide Microspheres. Cell Mol Neurobiol 2017; 37:1487-1499. [PMID: 28260198 DOI: 10.1007/s10571-017-0479-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 02/23/2017] [Indexed: 10/20/2022]
Abstract
Microparticles have potential as neuron-specific delivery platforms and devices with many applications in neuroscience, pharmacology, and biomedicine. To date, most literature suggests that neurons are not phagocytic cells capable of internalizing microparticles larger than 0.5 μm. We report that neurons transport fluorescently labeled silica microspheres with diameters of 1-2 μm into neurons in vitro and in rat brain without having overt effects on cell viability. Using flow cytometry, fluorescence-activated cell sorting, and confocal and electron microscopy, we first found that SH-SY5Y human neuroblastoma cells internalized 1-μm silicon microspheres with surface charges of -70 mV (hydroxyl and carboxyl), -30 mV (amino), and +40 mV (ammonio). Uptake was rapid, within 2-4 h, and did not affect cell viability 48 h later. Flow cytometry assays indicate that SH-SY5Y cells internalize 1- and 1.5-μm microspheres at the same rate over a 24-h incubation period. Electron microscopy confirms that SH-SY5Y cells internalize 1-, 1.5-, and 2-μm microspheres. Confocal microscopy demonstrated that primary cortical neurons also internalized 1-, 1.5-, and 2-μm amino microspheres within 4 h. Finally, we injected 1-μm amino microspheres into rat striatum and found microspheres inside neurons. Overall, neurons can internalize microspheres up to 2 μm in diameter with a range of surface chemical groups and charges. These findings allow a host of neuroscience and neuroengineering applications including intracellular microdevices within neurons.
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Affiliation(s)
- Veronica J Wallace
- Neuronal Ensembles in Addiction Section, Behavioral Neuroscience Research Branch, IRP/NIDA/NIH, 251 Bayview Drive, Baltimore, MD, 21224, USA
| | - Raffaello Cimbro
- Division of Rheumatology, Bayview Flow Cytometry Core, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - F Javier Rubio
- Neuronal Ensembles in Addiction Section, Behavioral Neuroscience Research Branch, IRP/NIDA/NIH, 251 Bayview Drive, Baltimore, MD, 21224, USA
| | - Lowella V Fortuno
- Optogenetics and Transgenic Technology Core, IRP/NIDA/NIH, 251 Bayview Drive, Baltimore, MD, 21224, USA
| | - Julie C Necarsulmer
- Optogenetics and Transgenic Technology Core, IRP/NIDA/NIH, 251 Bayview Drive, Baltimore, MD, 21224, USA
| | - Pyry P Koivula
- Optogenetics and Transgenic Technology Core, IRP/NIDA/NIH, 251 Bayview Drive, Baltimore, MD, 21224, USA
| | - Mark J Henderson
- Optogenetics and Transgenic Technology Core, IRP/NIDA/NIH, 251 Bayview Drive, Baltimore, MD, 21224, USA
| | - Lindsay M DeBiase
- Synaptic Plasticity Section, Cellular Neurobiology Research Branch, IRP/NIDA/NIH/DHHS, 251 Bayview Blvd, Suite 200, Baltimore, MD, 21224, USA
| | - Brandon L Warren
- Neuronal Ensembles in Addiction Section, Behavioral Neuroscience Research Branch, IRP/NIDA/NIH, 251 Bayview Drive, Baltimore, MD, 21224, USA
| | - Brandon K Harvey
- Optogenetics and Transgenic Technology Core, IRP/NIDA/NIH, 251 Bayview Drive, Baltimore, MD, 21224, USA
| | - Bruce T Hope
- Neuronal Ensembles in Addiction Section, Behavioral Neuroscience Research Branch, IRP/NIDA/NIH, 251 Bayview Drive, Baltimore, MD, 21224, USA.
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Saito S, Masuda K, Mori Y, Nakatani S, Yoshioka Y, Murase K. Mapping of left ventricle wall thickness in mice using 11.7-T magnetic resonance imaging. Magn Reson Imaging 2017; 36:128-134. [DOI: 10.1016/j.mri.2016.10.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 10/26/2016] [Indexed: 11/28/2022]
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Cen P, Chen J, Hu C, Fan L, Wang J, Li L. Noninvasive in-vivo tracing and imaging of transplanted stem cells for liver regeneration. Stem Cell Res Ther 2016; 7:143. [PMID: 27664081 PMCID: PMC5035504 DOI: 10.1186/s13287-016-0396-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Terminal liver disease is a major cause of death globally. The only ultimate therapeutic approach is orthotopic liver transplant. Because of the innate defects of organ transplantation, stem cell-based therapy has emerged as an effective alternative, based on the capacity of stem cells for multilineage differentiation and their homing to injured sites. However, the disease etiology, cell type, timing of cellular graft, therapeutic dose, delivery route, and choice of endpoints have varied between studies, leading to different, even divergent, results. In-vivo cell imaging could therefore help us better understand the fate and behaviors of stem cells to optimize cell-based therapy for liver regeneration. The primary imaging techniques in preclinical or clinical studies have consisted of optical imaging, magnetic resonance imaging, radionuclide imaging, reporter gene imaging, and Y chromosome-based fluorescence in-situ hybridization imaging. More attention has been focused on developing new or modified imaging methods for longitudinal and high-efficiency tracing. Herein, we provide a descriptive overview of imaging modalities and discuss recent advances in the field of molecular imaging of intrahepatic stem cell grafts.
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Affiliation(s)
- Panpan Cen
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, School of Medicine; First Affiliated Hospital; Zhejiang University, Hangzhou, 310006, China
| | - Jiajia Chen
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, School of Medicine; First Affiliated Hospital; Zhejiang University, Hangzhou, 310006, China
| | - Chenxia Hu
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, School of Medicine; First Affiliated Hospital; Zhejiang University, Hangzhou, 310006, China
| | - Linxiao Fan
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, School of Medicine; First Affiliated Hospital; Zhejiang University, Hangzhou, 310006, China
| | - Jie Wang
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, School of Medicine; First Affiliated Hospital; Zhejiang University, Hangzhou, 310006, China
| | - Lanjuan Li
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, School of Medicine; First Affiliated Hospital; Zhejiang University, Hangzhou, 310006, China.
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Mount S, Davis DR. Electrical effects of stem cell transplantation for ischaemic cardiomyopathy: friend or foe? J Physiol 2016; 594:2511-24. [PMID: 26584682 DOI: 10.1113/jp270540] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 10/18/2015] [Indexed: 01/07/2023] Open
Abstract
Despite advances in other realms of cardiac care, the mortality attributable to ischaemic cardiomyopathy has only marginally decreased over the last 10 years. These findings highlight the growing realization that current pharmacological and device therapies rarely reverse disease progression and rationalize a focus on novel means to reverse, repair and re-vascularize damaged hearts. As such, multiple candidate cell types have been used to regenerate damaged hearts either directly (through differentiation to form new tissue) or indirectly (via paracrine effects). Emerging literature suggests that robust engraftment of electrophysiolgically heterogeneous tissue from transplanted cells comes at the cost of a high incidence of ventricular arrhythmias. Similar electrophysiological studies of haematological stem cells raised early concerns that transplant of depolarized, inexcitable cells that also induce paracrine-mediated electrophysiological remodelling may be pro-arrhythmic. However, meta-analyses suggest that patients receiving haematological stem cells paradoxically may experience a decrease in ventricular arrhythmias, an observation potentially related to the extremely poor long-term survival of injected cells. Finally, early clinical and preclinical data from technologies capable of differentiating to a mature cardiomyocyte phenotype (such as cardiac-derived stem cells) suggests that these cells are not pro-arrhythmic although they too lack robust long-term engraftment. These results highlight the growing understanding that as next generation cell therapies are developed, emphasis should also be placed on understanding possible anti-arrhythmic contributions of transplanted cells while vigilance is needed to predict and treat the inadvertent effects of regenerative cell therapies on the electrophysiological stability of the ischaemic cardiomyopathic heart.
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Affiliation(s)
- Seth Mount
- University of Ottawa Heart Institute, Ottawa, Canada, K1Y 4W7
| | - Darryl R Davis
- University of Ottawa Heart Institute, Ottawa, Canada, K1Y 4W7
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15
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Nanoparticles-Assisted Stem Cell Therapy for Ischemic Heart Disease. Stem Cells Int 2015; 2016:1384658. [PMID: 26839552 PMCID: PMC4709699 DOI: 10.1155/2016/1384658] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 10/04/2015] [Accepted: 10/08/2015] [Indexed: 01/15/2023] Open
Abstract
Stem cell therapy has attracted increasing attention as a promising treatment strategy for cardiac repair in ischemic heart disease. Nanoparticles (NPs), with their superior physical and chemical properties, have been widely utilized to assist stem cell therapy. With the help of NPs, stem cells can be genetically engineered for enhanced paracrine profile. To further understand the fate and behaviors of stem cells in ischemic myocardium, imaging NPs can label stem cells and be tracked in vivo under multiple modalities. Besides that, NPs can also be used to enhance stem cell retention in myocardium. These facts have raised efforts on the development of more intelligent and multifunctional NPs for cellular application. Herein, an overview of the applications of NPs-assisted stem cell therapy is given. Key issues and future prospects are also critically addressed.
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16
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Skelton RJP, Khoja S, Almeida S, Rapacchi S, Han F, Engel J, Zhao P, Hu P, Stanley EG, Elefanty AG, Kwon M, Elliott DA, Ardehali R. Magnetic Resonance Imaging of Iron Oxide-Labeled Human Embryonic Stem Cell-Derived Cardiac Progenitors. Stem Cells Transl Med 2015; 5:67-74. [PMID: 26582908 DOI: 10.5966/sctm.2015-0077] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 09/16/2015] [Indexed: 12/15/2022] Open
Abstract
UNLABELLED Given the limited regenerative capacity of the heart, cellular therapy with stem cell-derived cardiac cells could be a potential treatment for patients with heart disease. However, reliable imaging techniques to longitudinally assess engraftment of the transplanted cells are scant. To address this issue, we used ferumoxytol as a labeling agent of human embryonic stem cell-derived cardiac progenitor cells (hESC-CPCs) to facilitate tracking by magnetic resonance imaging (MRI) in a large animal model. Differentiating hESCs were exposed to ferumoxytol at different time points and varying concentrations. We determined that treatment with ferumoxytol at 300 μg/ml on day 0 of cardiac differentiation offered adequate cell viability and signal intensity for MRI detection without compromising further differentiation into definitive cardiac lineages. Labeled hESC-CPCs were transplanted by open surgical methods into the left ventricular free wall of uninjured pig hearts and imaged both ex vivo and in vivo. Comprehensive T2*-weighted images were obtained immediately after transplantation and 40 days later before termination. The localization and dispersion of labeled cells could be effectively imaged and tracked at days 0 and 40 by MRI. Thus, under the described conditions, ferumoxytol can be used as a long-term, differentiation-neutral cell-labeling agent to track transplanted hESC-CPCs in vivo using MRI. SIGNIFICANCE The development of a safe and reproducible in vivo imaging technique to track the fate of transplanted human embryonic stem cell-derived cardiac progenitor cells (hESC-CPCs) is a necessary step to clinical translation. An iron oxide nanoparticle (ferumoxytol)-based approach was used for cell labeling and subsequent in vivo magnetic resonance imaging monitoring of hESC-CPCs transplanted into uninjured pig hearts. The present results demonstrate the use of ferumoxytol labeling and imaging techniques in tracking the location and dispersion of cell grafts, highlighting its utility in future cardiac stem cell therapy trials.
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Affiliation(s)
- Rhys J P Skelton
- Division of Cardiology, Department of Internal Medicine, David Geffen School of Medicine, University of California, Los Angeles, California, USA Murdoch Childrens Research Institute, The Royal Children's Hospital, Parkville, Victoria, Australia Eli and Edythe Broad Stem Cell Research Center, University of California, Los Angeles, California, USA
| | - Suhail Khoja
- Eli and Edythe Broad Stem Cell Research Center, University of California, Los Angeles, California, USA
| | - Shone Almeida
- Division of Cardiology, Department of Internal Medicine, David Geffen School of Medicine, University of California, Los Angeles, California, USA
| | - Stanislas Rapacchi
- Division of Radiology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, California, USA
| | - Fei Han
- Division of Radiology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, California, USA
| | - James Engel
- Eli and Edythe Broad Stem Cell Research Center, University of California, Los Angeles, California, USA
| | - Peng Zhao
- Eli and Edythe Broad Stem Cell Research Center, University of California, Los Angeles, California, USA
| | - Peng Hu
- Division of Radiology, Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, California, USA
| | - Edouard G Stanley
- Murdoch Childrens Research Institute, The Royal Children's Hospital, Parkville, Victoria, Australia
| | - Andrew G Elefanty
- Murdoch Childrens Research Institute, The Royal Children's Hospital, Parkville, Victoria, Australia
| | - Murray Kwon
- Division of Cardiothoracic Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, California, USA
| | - David A Elliott
- Murdoch Childrens Research Institute, The Royal Children's Hospital, Parkville, Victoria, Australia
| | - Reza Ardehali
- Division of Cardiology, Department of Internal Medicine, David Geffen School of Medicine, University of California, Los Angeles, California, USA Eli and Edythe Broad Stem Cell Research Center, University of California, Los Angeles, California, USA
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Saeed M, Van TA, Krug R, Hetts SW, Wilson MW. Cardiac MR imaging: current status and future direction. Cardiovasc Diagn Ther 2015; 5:290-310. [PMID: 26331113 DOI: 10.3978/j.issn.2223-3652.2015.06.07] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 06/17/2015] [Indexed: 12/12/2022]
Abstract
Coronary artery disease is currently a worldwide epidemic with increasing impact on healthcare systems. Magnetic resonance imaging (MRI) sequences give complementary information on LV function, regional perfusion, angiogenesis, myocardial viability and orientations of myocytes. T2-weighted short-tau inversion recovery (T2-STIR), fat suppression and black blood sequences have been frequently used for detecting edematous area at risk (AAR) of infarction. T2 mapping, however, indicated that the edematous reaction in acute myocardial infarct (AMI) is not stable and warranted the use of edematous area in evaluating therapies. On the other hand, cine MRI demonstrated reproducible data on LV function in healthy volunteers and LV remodeling in patients. Noninvasive first pass perfusion, using exogenous tracer (gadolinium-based contrast media) and arterial spin labeling MRI, using endogenous tracer (water), are sensitive and useful techniques for evaluating myocardial perfusion and angiogenesis. Recently, new strategies have been developed to quantify myocardial viability using T1-mapping and equilibrium contrast enhanced MR techniques because existing delayed contrast enhancement MRI (DE-MRI) sequences are limited in detecting patchy microinfarct and diffuse fibrosis. These new techniques were successfully used for characterizing diffuse myocardial fibrosis associated with myocarditis, amyloidosis, sarcoidosis heart failure, aortic hypertrophic cardiomyopathy, congenital heart disease, restrictive cardiomyopathy, arrhythmogenic right ventricular dysplasia and hypertension). Diffusion MRI provides information regarding microscopic tissue structure, while diffusion tensor imaging (DTI) helps to characterize the myocardium and monitor the process of LV remodeling after AMI. Novel trends in hybrid imaging, such as cardiac positron emission tomography (PET)/MRI and optical imaging/MRI, are recently under intensive investigation. With the promise of higher spatial-temporal resolution and 3D coverage in the near future, cardiac MRI will be an indispensible tool in the diagnosis of cardiac diseases, coronary intervention and myocardial therapeutic delivery.
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Affiliation(s)
- Maythem Saeed
- 1 Department of Radiology and Biomedical Imaging, School of Medicine, University of California San Francisco, San Francisco, CA, USA ; 2 Zentralinstitut für Medizintechnik, Technical University of Munich, Munich, Germany
| | - Tu Anh Van
- 1 Department of Radiology and Biomedical Imaging, School of Medicine, University of California San Francisco, San Francisco, CA, USA ; 2 Zentralinstitut für Medizintechnik, Technical University of Munich, Munich, Germany
| | - Roland Krug
- 1 Department of Radiology and Biomedical Imaging, School of Medicine, University of California San Francisco, San Francisco, CA, USA ; 2 Zentralinstitut für Medizintechnik, Technical University of Munich, Munich, Germany
| | - Steven W Hetts
- 1 Department of Radiology and Biomedical Imaging, School of Medicine, University of California San Francisco, San Francisco, CA, USA ; 2 Zentralinstitut für Medizintechnik, Technical University of Munich, Munich, Germany
| | - Mark W Wilson
- 1 Department of Radiology and Biomedical Imaging, School of Medicine, University of California San Francisco, San Francisco, CA, USA ; 2 Zentralinstitut für Medizintechnik, Technical University of Munich, Munich, Germany
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Bakermans AJ, Abdurrachim D, Moonen RPM, Motaal AG, Prompers JJ, Strijkers GJ, Vandoorne K, Nicolay K. Small animal cardiovascular MR imaging and spectroscopy. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2015; 88-89:1-47. [PMID: 26282195 DOI: 10.1016/j.pnmrs.2015.03.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 03/09/2015] [Accepted: 03/09/2015] [Indexed: 06/04/2023]
Abstract
The use of MR imaging and spectroscopy for studying cardiovascular disease processes in small animals has increased tremendously over the past decade. This is the result of the remarkable advances in MR technologies and the increased availability of genetically modified mice. MR techniques provide a window on the entire timeline of cardiovascular disease development, ranging from subtle early changes in myocardial metabolism that often mark disease onset to severe myocardial dysfunction associated with end-stage heart failure. MR imaging and spectroscopy techniques play an important role in basic cardiovascular research and in cardiovascular disease diagnosis and therapy follow-up. This is due to the broad range of functional, structural and metabolic parameters that can be quantified by MR under in vivo conditions non-invasively. This review describes the spectrum of MR techniques that are employed in small animal cardiovascular disease research and how the technological challenges resulting from the small dimensions of heart and blood vessels as well as high heart and respiratory rates, particularly in mice, are tackled.
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Affiliation(s)
- Adrianus J Bakermans
- Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands; Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Desiree Abdurrachim
- Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Rik P M Moonen
- Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Abdallah G Motaal
- Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands; Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Jeanine J Prompers
- Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Gustav J Strijkers
- Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands; Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Katrien Vandoorne
- Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Klaas Nicolay
- Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands.
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19
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Huang Z, Li C, Yang S, Xu J, Shen Y, Xie X, Dai Y, Lu H, Gong H, Sun A, Qian J, Ge J. Magnetic resonance hypointensive signal primarily originates from extracellular iron particles in the long-term tracking of mesenchymal stem cells transplanted in the infarcted myocardium. Int J Nanomedicine 2015. [PMID: 25767388 PMCID: PMC4354691 DOI: 10.2147/ijn.s77858] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
PURPOSE The long-lasting hypointensities in cardiac magnetic resonance (CMR) were believed to originate from superparamagnetic iron oxide (SPIO)-engulfed macrophages during long-term stem cell tracking. However, the iron clearance capacity of the ischemic heart was limited. Therefore, we speculated that the extracellular SPIO particles may also be involved in the generation of false-positive signals. METHODS AND RESULTS Male swine mesenchymal stem cells (MSCs) were incubated with SPIO for 24 hours, and SPIO labeling had no significant effects on either cell viability or differentiation. In vitro studies showed that magnetic resonance failed to distinguish SPIO from living SPIO-MSCs or dead SPIO-MSCs. Two hours after the establishment of the female swine acute myocardial infarction model, 2×10(7) male SPIO-labeled MSCs (n=5) or unlabeled MSCs (n=5) were transextracardially injected into the infarcted myocardium at ten distinct sites. In vivo CMR with T2 star weighted imaging-flash-2D sequence revealed a signal void corresponding to the initial SPIO-MSC injection sites. At 6 months after transplantation, CMR identified 32 (64%) of the 50 injection sites, where massive Prussian blue-positive iron deposits were detected by pathological examination. However, iron particles were predominantly distributed in the extracellular space, and a minority was distributed within CD68-positive macrophages and other CD68-negative cells. No sex-determining region Y DNA of donor MSCs was detected. CONCLUSION CMR hypointensive signal is primarily caused by extracellular iron particles in the long-term tracking of transplanted MSCs after myocardial infarction. Consideration should be given to both the false-positive signal and the potential cardiac toxicity of long-standing iron deposits in the heart.
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Affiliation(s)
- Zheyong Huang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Chenguang Li
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Shan Yang
- Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Jianfeng Xu
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Yunli Shen
- Department of Cardiology, Shanghai East Hospital, Tongji University, Shanghai, People's Republic of China
| | - Xinxing Xie
- Department of Cardiology, Qianfoshan Hospital, Shandong University, Jinan, Shandong Province, People's Republic of China
| | - Yuxiang Dai
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Hao Lu
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Hui Gong
- Institute of Biomedical Science, Fudan University, Shanghai, People's Republic of China
| | - Aijun Sun
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Juying Qian
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Junbo Ge
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
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20
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Insulin-producing cells from embryonic stem cells rescues hyperglycemia via intra-spleen migration. Sci Rep 2014; 4:7586. [PMID: 25533571 PMCID: PMC4274503 DOI: 10.1038/srep07586] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 11/24/2014] [Indexed: 02/07/2023] Open
Abstract
Implantation of embryonic stem cells (ESC)-derived insulin-producing cells has been extensively investigated for treatment of diabetes in animal models. However, the in vivo behavior and migration of transplanted cells in diabetic models remains unclear. Here we investigated the location and migration of insulin-producing cells labeled with superparamagnetic iron oxide (SPIO) using a dynamic MRI tracking method. SPIO labeled cells showed hypointense signal under the kidney subcapsules of diabetic mice on MRI, and faded gradually over the visiting time. However, new hypointense signal appeared in the spleen 1 week after transplantation, and became obvious with the time prolongation. Further histological examination proved the immigrated cells were insulin and C-peptide positive cells which were evenly distributed throughout the spleen. These intra-spleen insulin-producing cells maintained their protective effects against hyperglycemia in vivo, and these effects were reversed upon spleen removal. Transplantation of insulin-producing cells through spleen acquired an earlier blood glucose control as compared with that through kidney subcapsules. In summary, our data demonstrate that insulin-producing cells transplanted through kidney subcapsules were not located in situ but migrated into spleen, and rescues hyperglycemia in diabetic models. MRI may provide a novel tracking method for preclinical cell transplantation therapy of diabetes continuously and non-invasively.
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21
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Feng G, Tay CY, Chui QX, Liu R, Tomczak N, Liu J, Tang BZ, Leong DT, Liu B. Ultrabright organic dots with aggregation-induced emission characteristics for cell tracking. Biomaterials 2014; 35:8669-77. [DOI: 10.1016/j.biomaterials.2014.06.023] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2014] [Accepted: 06/09/2014] [Indexed: 02/07/2023]
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22
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Naumova AV, Balu N, Yarnykh VL, Reinecke H, Murry CE, Yuan C. Magnetic Resonance Imaging Tracking of Graft Survival in the Infarcted Heart: Iron Oxide Particles Versus Ferritin Overexpression Approach. J Cardiovasc Pharmacol Ther 2014; 19:358-367. [PMID: 24685664 DOI: 10.1177/1074248414525999] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The main objective of cell therapy is the regeneration of damaged tissues. To distinguish graft from host tissue by magnetic resonance imaging (MRI), a paramagnetic label must be introduced to cells prior to transplantation. The paramagnetic label can be either exogenous iron oxide nanoparticles or a genetic overexpression of ferritin, an endogenous iron storage protein. The purpose of this work was to compare the efficacy of these 2 methods for MRI evaluation of engrafted cell survival in the infarcted mouse heart. Mouse skeletal myoblasts were labeled either by cocultivation with iron oxide particles or by engineering them to overexpress ferritin. Along with live cell transplantation, 2 other groups of mice were injected with dead-labeled cells. Both particle-labeled and ferritin-tagged grafts were detected as areas of MRI signal hypointensity in the left ventricle of the mouse heart using T2*-weighted sequences, although the signal attenuation decreased with ferritin tagging. Importantly, live cells could not be distinguished from dead cells when labeled with iron oxide particles, whereas the ferritin tagging was detected only in live grafts, thereby allowing identification of viable grafts using MRI. Thus, iron oxide particles can provide information about initial cell injection success but cannot assess graft viability. On the other hand, genetically based cell tagging, such as ferritin overexpression, despite having lower signal intensity in comparison with iron oxide particles, is able to identify live transplanted cells.
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Affiliation(s)
- Anna V Naumova
- Department of Radiology, University of Washington, Seattle, WA, USA Center for Cardiovascular Biology, University of Washington, Seattle, WA, USA Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA
| | - Niranjan Balu
- Department of Radiology, University of Washington, Seattle, WA, USA Center for Cardiovascular Biology, University of Washington, Seattle, WA, USA
| | - Vasily L Yarnykh
- Department of Radiology, University of Washington, Seattle, WA, USA Center for Cardiovascular Biology, University of Washington, Seattle, WA, USA
| | - Hans Reinecke
- Center for Cardiovascular Biology, University of Washington, Seattle, WA, USA Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA Department of Pathology, University of Washington, Seattle, WA, USA
| | - Charles E Murry
- Center for Cardiovascular Biology, University of Washington, Seattle, WA, USA Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA Department of Pathology, University of Washington, Seattle, WA, USA Department of Bioengineering, University of Washington, Seattle, WA, USA Department of Medicine/Cardiology, University of Washington, Seattle, WA, USA
| | - Chun Yuan
- Department of Radiology, University of Washington, Seattle, WA, USA Center for Cardiovascular Biology, University of Washington, Seattle, WA, USA Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA Department of Bioengineering, University of Washington, Seattle, WA, USA
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23
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Azene N, Fu Y, Maurer J, Kraitchman DL. Tracking of stem cells in vivo for cardiovascular applications. J Cardiovasc Magn Reson 2014; 16:7. [PMID: 24406054 PMCID: PMC3925252 DOI: 10.1186/1532-429x-16-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2012] [Accepted: 12/11/2013] [Indexed: 01/14/2023] Open
Abstract
In the past ten years, the concept of injecting stem and progenitor cells to assist with rebuilding damaged blood vessels and myocardial tissue after injury in the heart and peripheral vasculature has moved from bench to bedside. Non-invasive imaging can not only provide a means to assess cardiac repair and, thereby, cellular therapy efficacy but also a means to confirm cell delivery and engraftment after administration. In this first of a two-part review, we will review the different types of cellular labeling techniques and the application of these techniques in cardiovascular magnetic resonance and ultrasound. In addition, we provide a synopsis of the cardiac cellular clinical trials that have been performed to-date.
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Affiliation(s)
- Nicole Azene
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University, Baltimore, MD, USA
- Department of Molecular and Comparative Pathobiology, The Johns Hopkins University, Baltimore, MD, USA
| | - Yingli Fu
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University, Baltimore, MD, USA
| | - Jeremy Maurer
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University, Baltimore, MD, USA
| | - Dara L Kraitchman
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University, Baltimore, MD, USA
- Department of Molecular and Comparative Pathobiology, The Johns Hopkins University, Baltimore, MD, USA
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, 600 N. Wolfe Street, 314 Park Building, Baltimore, MD 21287, USA
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24
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Mathiasen AB, Kastrup J. Non-invasive in-vivo imaging of stem cells after transplantation in cardiovascular tissue. Am J Cancer Res 2013; 3:561-72. [PMID: 23946822 PMCID: PMC3741605 DOI: 10.7150/thno.5787] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2012] [Accepted: 03/03/2013] [Indexed: 12/11/2022] Open
Abstract
Stem cell therapy for degenerative diseases, including ischemic heart disease is now a clinical reality. In the search for the optimal cell type for each patient category, many different stem cell subpopulations have been used. In addition, different cell processing procedures and delivery methods have been utilized. Moreover, choices of endpoints have varied between studies. Diverging results have been reported from clinical experiences, with some studies demonstrating promising results with improved cardiac function and reduced mortality and clinical symptoms, and others have seen no improvements. To better understand the underlying mechanisms of these results, a reverse translation from bedside to bench has been opened. Non-invasive cell tracking after implantation has a pivotal role in this translation. Imaging based methods can help elucidate important issues such as retention, migration and efficacy of the transplanted cells. Great effort is being made in finding new and better imaging techniques for different imaging modalities, and much have already been learned. But there are still many unanswered questions. In this review, we give an overview of the imaging modalities used for cell tracking and summarize the latest advances within the field.
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Roura S, Gálvez-Montón C, Bayes-Genis A. Bioluminescence imaging: a shining future for cardiac regeneration. J Cell Mol Med 2013; 17:693-703. [PMID: 23402217 PMCID: PMC3823173 DOI: 10.1111/jcmm.12018] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Accepted: 12/28/2012] [Indexed: 12/28/2022] Open
Abstract
Advances in bioanalytical techniques have become crucial for both basic research and medical practice. One example, bioluminescence imaging (BLI), is based on the application of natural reactants with light-emitting capabilities (photoproteins and luciferases) isolated from a widespread group of organisms. The main challenges in cardiac regeneration remain unresolved, but a vast number of studies have harnessed BLI with the discovery of aequorin and green fluorescent proteins. First described in the luminous hydromedusan Aequorea victoria in the early 1960s, bioluminescent proteins have greatly contributed to the design and initiation of ongoing cell-based clinical trials on cardiovascular diseases. In conjunction with advances in reporter gene technology, BLI provides valuable information about the location and functional status of regenerative cells implanted into numerous animal models of disease. The purpose of this review was to present the great potential of BLI, among other existing imaging modalities, to refine effectiveness and underlying mechanisms of cardiac cell therapy. We recount the first discovery of natural primary compounds with light-emitting capabilities, and follow their applications to bioanalysis. We also illustrate insights and perspectives on BLI to illuminate current efforts in cardiac regeneration, where the future is bright.
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Affiliation(s)
- Santiago Roura
- ICREC Research Program, Fundació Institut d'Investigació en Ciències de la Salut Germans Trias i Pujol (IGTP), Badalona, Spain
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Li K, Qin W, Ding D, Tomczak N, Geng J, Liu R, Liu J, Zhang X, Liu H, Liu B, Tang BZ. Photostable fluorescent organic dots with aggregation-induced emission (AIE dots) for noninvasive long-term cell tracing. Sci Rep 2013; 3:1150. [PMID: 23359649 PMCID: PMC3556677 DOI: 10.1038/srep01150] [Citation(s) in RCA: 236] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Accepted: 12/11/2012] [Indexed: 12/24/2022] Open
Abstract
Long-term noninvasive cell tracing by fluorescent probes is of great importance to life science and biomedical engineering. For example, understanding genesis, development, invasion and metastasis of cancerous cells and monitoring tissue regeneration after stem cell transplantation require continual tracing of the biological processes by cytocompatible fluorescent probes over a long period of time. In this work, we successfully developed organic far-red/near-infrared dots with aggregation-induced emission (AIE dots) and demonstrated their utilities as long-term cell trackers. The high emission efficiency, large absorptivity, excellent biocompatibility, and strong photobleaching resistance of the AIE dots functionalized by cell penetrating peptides derived from transactivator of transcription proteins ensured outstanding long-term noninvasive in vitro and in vivo cell tracing. The organic AIE dots outperform their counterparts of inorganic quantum dots, opening a new avenue in the development of fluorescent probes for following biological processes such as carcinogenesis.
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Affiliation(s)
- Kai Li
- Institute of Materials Research and Engineering, 3, Research Link, Singapore 117602
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576
- These authors contributed equally to this work
| | - Wei Qin
- Department of Chemistry, Division of Biomedical Engineering, Institute for Advanced Study, State Key Laboratory of Molecular Neuroscience, and Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
- These authors contributed equally to this work
| | - Dan Ding
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576
| | - Nikodem Tomczak
- Institute of Materials Research and Engineering, 3, Research Link, Singapore 117602
| | - Junlong Geng
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576
| | - Rongrong Liu
- Institute of Materials Research and Engineering, 3, Research Link, Singapore 117602
| | - Jianzhao Liu
- Department of Chemistry, Division of Biomedical Engineering, Institute for Advanced Study, State Key Laboratory of Molecular Neuroscience, and Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Xinhai Zhang
- Institute of Materials Research and Engineering, 3, Research Link, Singapore 117602
| | - Hongwei Liu
- Institute of Materials Research and Engineering, 3, Research Link, Singapore 117602
| | - Bin Liu
- Institute of Materials Research and Engineering, 3, Research Link, Singapore 117602
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576
| | - Ben Zhong Tang
- Institute of Materials Research and Engineering, 3, Research Link, Singapore 117602
- Department of Chemistry, Division of Biomedical Engineering, Institute for Advanced Study, State Key Laboratory of Molecular Neuroscience, and Institute of Molecular Functional Materials, The Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong, China
- SCUT-HKUST Joint Research Laboratory, Guangdong Innovative Research Team, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, China, 510640
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Drey F, Choi YH, Neef K, Ewert B, Tenbrock A, Treskes P, Bovenschulte H, Liakopoulos OJ, Brenkmann M, Stamm C, Wittwer T, Wahlers T. Noninvasive in vivo tracking of mesenchymal stem cells and evaluation of cell therapeutic effects in a murine model using a clinical 3.0 T MRI. Cell Transplant 2012; 22:1971-80. [PMID: 23050950 DOI: 10.3727/096368912x657747] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Cardiac cell therapy with mesenchymal stem cells (MSCs) represents a promising treatment approach for end-stage heart failure. However, little is known about the underlying mechanisms and the fate of the transplanted cells. The objective of the presented work is to determine the feasibility of magnetic resonance imaging (MRI) and in vivo monitoring after transplantation into infarcted mouse hearts using a clinical 3.0 T MRI device. The labeling procedure of bone marrow-derived MSCs with micron-sized paramagnetic iron oxide particles (MPIOs) did not affect the viability of the cells and their cell type-defining properties when compared to unlabeled cells. Using a clinical 3.0 T MRI scanner equipped with a dedicated small animal solenoid coil, 10(5) labeled MSCs could be detected and localized in the mouse hearts for up to 4 weeks after intramyocardial transplantation. Weekly ECG-gated scans using T1-weighted sequences were performed, and left ventricular function was assessed. Histological analysis of hearts confirmed the survival of labeled MSCs in the target area up to 4 weeks after transplantation. In conclusion, in vivo tracking of labeled MSCs using a clinical 3.0 T MRI scanner is feasible. In combination with assessment of heart function, this technology allows the monitoring of the therapeutic efficacy of regenerative therapies in a small animal model.
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Affiliation(s)
- Florian Drey
- Department of Cardiothoracic Surgery, University of Cologne, Cologne, Germany
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Baker C, Taylor DG, Osuala K, Natarajan A, Molnar PJ, Hickman J, Alam S, Moscato B, Weinshenker D, Ebert SN. Adrenergic deficiency leads to impaired electrical conduction and increased arrhythmic potential in the embryonic mouse heart. Biochem Biophys Res Commun 2012; 423:536-41. [PMID: 22683331 DOI: 10.1016/j.bbrc.2012.05.163] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Accepted: 05/31/2012] [Indexed: 11/30/2022]
Abstract
To determine if adrenergic hormones play a critical role in the functional development of the cardiac pacemaking and conduction system, we employed a mouse model where adrenergic hormone production was blocked due to targeted disruption of the dopamine β-hydroxylase (Dbh) gene. Immunofluorescent histochemical evaluation of the major gap junction protein, connexin 43, revealed that its expression was substantially decreased in adrenergic-deficient (Dbh-/-) relative to adrenergic-competent (Dbh+/+ and Dbh+/-) mouse hearts at embryonic day 10.5 (E10.5), whereas pacemaker and structural protein staining appeared similar. To evaluate cardiac electrical conduction in these hearts, we cultured them on microelectrode arrays (8×8, 200 μm apart). Our results show a significant slowing of atrioventricular conduction in adrenergic-deficient hearts compared to controls (31.4±6.4 vs. 15.4±1.7 ms, respectively, p<0.05). To determine if the absence of adrenergic hormones affected heart rate and rhythm, mouse hearts from adrenergic-competent and deficient embryos were cultured ex vivo at E10.5, and heart rates were measured before and after challenge with the β-adrenergic receptor agonist, isoproterenol (0.5 μM). On average, all hearts showed increased heart rate responses following isoproterenol challenge, but a significant (p<0.05) 225% increase in the arrhythmic index (AI) was observed only in adrenergic-deficient hearts. These results show that adrenergic hormones may influence heart development by stimulating connexin 43 expression, facilitating atrioventricular conduction, and helping to maintain cardiac rhythm during a critical phase of embryonic development.
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Affiliation(s)
- Candice Baker
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, 6900 Lake Nona Blvd, Orlando, FL 32827, USA
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29
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Xiao L, Zhang Y, Yang Z, Xu Y, Kundu B, Chordia MD, Pan D. Synthesis of PECAM-1-specific 64Cu PET imaging agent: evaluation of myocardial infarction caused by ischemia-reperfusion injury in mouse. Bioorg Med Chem Lett 2012; 22:4144-7. [PMID: 22578454 DOI: 10.1016/j.bmcl.2012.04.059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Revised: 04/05/2012] [Accepted: 04/10/2012] [Indexed: 11/30/2022]
Abstract
A PECAM-1 specific PET imaging agent, PECAM-1-Ab-DOTA-(64)Cu, was synthesized by conjugating the anti-mouse PECAM-1 antibody with 2,2',2",2"'-(1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrayl)tetraacetic acid (DOTA) and subsequent labeling with (64)Cu. Positron Emission Tomography (PET) was successfully performed in a mouse model of myocardial infarction (MI) induced by an ischemia/reperfusion (I/R) injury, indicating the elevated expression of PECAM-1.
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Affiliation(s)
- Li Xiao
- Department of Radiology, The University of Virginia, 480 Ray C. Hunt Dr., Snyder Bldg, Charlottesville, VA 22908, USA
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Abstract
Cardiovascular diseases (CVDs) are the leading cause of death worldwide. The use of stem cells to improve recovery of the injured heart after myocardial infarction (MI) is an important emerging therapeutic strategy. However, recent reviews of clinical trials of stem cell therapy for MI and ischemic heart disease recovery report that less than half of the trials found only small improvements in cardiac function. In clinical trials, bone marrow, peripheral blood, or umbilical cord blood cells were used as the source of stem cells delivered by intracoronary infusion. Some trials administered only a stem cell mobilizing agent that recruits endogenous sources of stem cells. Important challenges to improve the effectiveness of stem cell therapy for CVD include: (1) improved identification, recruitment, and expansion of autologous stem cells; (2) identification of mobilizing and homing agents that increase recruitment; and (3) development of strategies to improve stem cell survival and engraftment of both endogenous and exogenous sources of stem cells. This review is an overview of stem cell therapy for CVD and discusses the challenges these three areas present for maximum optimization of the efficacy of stem cell therapy for heart disease, and new strategies in progress.
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Affiliation(s)
- Jane Hoover-Plow
- Departmentof Cardiovascular Medicine, Joseph J Jacobs Center for Thrombosis and Vascular Biology, Cleveland Clinic Lerner Research Institute, Cleveland, OH 44195, USA.
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Saeed M, Hetts SW, English J, Wilson M. MR fluoroscopy in vascular and cardiac interventions (review). Int J Cardiovasc Imaging 2012; 28:117-37. [PMID: 21359519 PMCID: PMC3275732 DOI: 10.1007/s10554-010-9774-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Accepted: 12/13/2010] [Indexed: 12/22/2022]
Abstract
Vascular and cardiac disease remains a leading cause of morbidity and mortality in developed and emerging countries. Vascular and cardiac interventions require extensive fluoroscopic guidance to navigate endovascular catheters. X-ray fluoroscopy is considered the current modality for real time imaging. It provides excellent spatial and temporal resolution, but is limited by exposure of patients and staff to ionizing radiation, poor soft tissue characterization and lack of quantitative physiologic information. MR fluoroscopy has been introduced with substantial progress during the last decade. Clinical and experimental studies performed under MR fluoroscopy have indicated the suitability of this modality for: delivery of ASD closure, aortic valves, and endovascular stents (aortic, carotid, iliac, renal arteries, inferior vena cava). It aids in performing ablation, creation of hepatic shunts and local delivery of therapies. Development of more MR compatible equipment and devices will widen the applications of MR-guided procedures. At post-intervention, MR imaging aids in assessing the efficacy of therapies, success of interventions. It also provides information on vascular flow and cardiac morphology, function, perfusion and viability. MR fluoroscopy has the potential to form the basis for minimally invasive image-guided surgeries that offer improved patient management and cost effectiveness.
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Affiliation(s)
- Maythem Saeed
- Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA 94107-1701, USA.
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Lee WY, Wei HJ, Wang JJ, Lin KJ, Lin WW, Chen DY, Huang CC, Lee TY, Ma HY, Hwang SM, Chang Y, Sung HW. Vascularization and restoration of heart function in rat myocardial infarction using transplantation of human cbMSC/HUVEC core-shell bodies. Biomaterials 2011; 33:2127-36. [PMID: 22169824 DOI: 10.1016/j.biomaterials.2011.11.059] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Accepted: 11/22/2011] [Indexed: 01/02/2023]
Abstract
Cell transplantation is a promising strategy for therapeutic treatment of ischemic heart diseases. In this study, cord blood mesenchymal stem cells (cbMSCs) and human umbilical vein endothelial cells (HUVECs) in the form of core-shell bodies (cbMSC/HUVEC bodies) were prepared to promote vascularization and restore heart functions in an experimentally-created myocardial infarction (MI) rat model. Saline, cbMSC bodies and HUVEC bodies were used as controls. In vitro results indicated that cbMSC/HUVEC bodies possessed the capability of heterotypic assembly of cbMSCs and HUVECs into robust and durable tubular networks on Matrigel. The up-regulated gene expressions of VEGF and IGF-1 reflected the robust expansion of tubular networks; in addition, the augmented levels of SMA and SM22 suggested smooth muscle differentiation of cbMSCs, possibly helping to improve the durability of networks. Moreover, according to the in vivo echocardiographic, magnetic resonance and computed-tomographic results, transplantation of cbMSC/HUVEC bodies benefited post-MI dysfunction. Furthermore, the vascularization analyses demonstrated the robust vasculogenic potential of cbMSC/HUVEC bodies in vivo, thus contributing to the greater viable myocardium and the less scar region, and ultimately restoring the cardiac function. The concept of core-shell bodies composed of perivascular cells and endothelial cells may serve as an attractive cell delivery vehicle for vasculogenesis, thus improving the cardiac function significantly.
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Affiliation(s)
- Wen-Yu Lee
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan
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Settles M, Etzrodt M, Kosanke K, Schiemann M, Zimmermann A, Meier R, Braren R, Huber A, Rummeny EJ, Weissleder R, Swirski FK, Wildgruber M. Different capacity of monocyte subsets to phagocytose iron-oxide nanoparticles. PLoS One 2011; 6:e25197. [PMID: 21984904 PMCID: PMC3184946 DOI: 10.1371/journal.pone.0025197] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Accepted: 08/29/2011] [Indexed: 02/04/2023] Open
Abstract
Objective To explore the capacity of human CD14+CD16++ and CD14++CD16- monocytes to phagocyte iron-oxide nanoparticles in vitro. Methods Human monocytes were labeled with four different magnetic nanoparticle preparations (Ferumoxides, SHU 555C, CLIO-680, MION-48) exhibiting distinct properties and cellular uptake was quantitatively assessed by flow cytometry, fluorescence microscopy, atomic absorption spectrometry and Magnetic Resonance Imaging (MRI). Additionally we determined whether cellular uptake of the nanoparticles resulted in phenotypic changes of cell surface markers. Results Cellular uptake differed between the four nanoparticle preparations. However for each nanoparticle tested, CD14++CD16- monocytes displayed a significantly higher uptake compared to CD14+CD16++ monocytes, this resulted in significantly lower T1 and T2 relaxation times of these cells. The uptake of iron-oxide nanoparticles further resulted in a remarkable shift of expression of cell surface proteins indicating that the labeling procedure affects the phenotype of CD14+CD16++ and CD14++CD16- monocytes differently. Conclusion Human monocyte subsets internalize different magnetic nanoparticle preparations differently, resulting in variable loading capacities, imaging phenotypes and likely biological properties.
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Affiliation(s)
- Marcus Settles
- Institut für Radiologie, Klinikum Rechts der Isar, Technische Universität München, Munich, Germany
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Fu Y, Azene N, Xu Y, Kraitchman DL. Tracking stem cells for cardiovascular applications in vivo: focus on imaging techniques. ACTA ACUST UNITED AC 2011; 3:473-486. [PMID: 22287982 DOI: 10.2217/iim.11.33] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Despite rapid translation of stem cell therapy into clinical practice, the treatment of cardiovascular disease using embryonic stem cells, adult stem and progenitor cells or induced pluripotent stem cells has not yielded satisfactory results to date. Noninvasive stem cell imaging techniques could provide greater insight into not only the therapeutic benefit, but also the fundamental mechanisms underlying stem cell fate, migration, survival and engraftment in vivo. This information could also assist in the appropriate choice of stem cell type(s), delivery routes and dosing regimes in clinical cardiovascular stem cell trials. Multiple imaging modalities, such as MRI, PET, SPECT and CT, have emerged, offering the ability to localize, monitor and track stem cells in vivo. This article discusses stem cell labeling approaches and highlights the latest cardiac stem cell imaging techniques that may help clinicians, research scientists or other healthcare professionals select the best cellular therapeutics for cardiovascular disease management.
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Affiliation(s)
- Yingli Fu
- Russell H Morgan Department of Radiology & Radiological Science, Johns Hopkins University, Baltimore, MD, USA
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35
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Cell tracking in cardiac repair: what to image and how to image. Eur Radiol 2011; 22:189-204. [PMID: 21735069 PMCID: PMC3229694 DOI: 10.1007/s00330-011-2190-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Revised: 04/21/2011] [Accepted: 05/09/2011] [Indexed: 01/01/2023]
Abstract
Stem cell therapies hold the great promise and interest for cardiac regeneration among scientists, clinicians and patients. However, advancement and distillation of a standard treatment regimen are not yet finalised. Into this breach step recent developments in the imaging biosciences. Thus far, these technical and protocol refinements have played a critical role not only in the evaluation of the recovery of cardiac function but also in providing important insights into the mechanism of action of stem cells. Molecular imaging, in its many forms, has rapidly become a necessary tool for the validation and optimisation of stem cell engrafting strategies in preclinical studies. These include a suite of radionuclide, magnetic resonance and optical imaging strategies to evaluate non-invasively the fate of transplanted cells. In this review, we highlight the state-of-the-art of the various imaging techniques for cardiac stem cell presenting the strengths and limitations of each approach, with a particular focus on clinical applicability.
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36
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Li Y, Yao Y, Sheng Z, Yang Y, Ma G. Dual-modal tracking of transplanted mesenchymal stem cells after myocardial infarction. Int J Nanomedicine 2011; 6:815-23. [PMID: 21589649 PMCID: PMC3090278 DOI: 10.2147/ijn.s17611] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2011] [Indexed: 01/16/2023] Open
Abstract
PURPOSE Results for implantation efficiency and effective improvement of cardiac function in the field of mesenchymal stem cells (MSCs) are controversial. To attempt to clarify this debate, we utilized magnetic resonance imaging (MRI) and near-infrared optical imaging (OI) to explore the effects of different delivery modes of mesenchymal stem cells on cell retention time and cardiac function after myocardial infarction (MI). METHODS Rat MSCs were labeled with superparamagnetic iron oxide nanoparticles and 1, 1'-dioctadecyl-3,3,3',3'-tetramethylindodicarbocyanine, 4-chlorobenzenesulfonate salt (DiD) for noninvasive cell tracking in a rat MI model. Rats underwent coronary artery ligation and were randomized into three experimental groups: intravenous (IV), intramyocardial (IM), and a control group. The first two groups referred to the route of delivery of the transplanted dual-labeled MSCs; whereas the control group was given an IV injection of serum-free medium one day post-MI. Cellular engraftment was determined 1 day and 7 days post cell delivery by measuring the iron and optical signals in explanted organs. Prussian blue staining and fluorescent microscopy were performed on histological sections for iron and DiD, respectively. Cardiac function was measured by echocardiography on day 7. RESULTS The cardiac function of the IM group increased significantly compared to the IV and control groups at day 7. In the IM group, labeled cells were visualized in the infracted heart by serial MRI, and the intensity by OI was significantly higher on day 1. In the IV group, the heart signals were significantly attenuated by dual-modal tracking at two time points, but the lung signals in OI were significantly stronger than the IM group at both time points. CONCLUSION IM injection of MSCs increased cell engraftment within infarcted hearts and improved cardiac function after MI. However, IV infusion has a low efficacy due to the cell trapping in the lung. Therefore, direct injection may provide an advantage over IV, with regard to retention of stem cells and protection of cardiac function.
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Affiliation(s)
- Yefei Li
- Department of Cardiology, Zhongda Hospital, Medical School of Southeast University, Nanjing, Jiangsu, China
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37
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Kammili RK, Taylor DG, Xia J, Osuala K, Thompson K, Menick DR, Ebert SN. Generation of novel reporter stem cells and their application for molecular imaging of cardiac-differentiated stem cells in vivo. Stem Cells Dev 2011; 19:1437-48. [PMID: 20109065 DOI: 10.1089/scd.2009.0308] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Stem cell therapies offer the potential for repair and regeneration of cardiac tissue. To facilitate evaluation of stem cell activity in vivo, we created novel dual-reporter mouse embryonic stem (mES) cell lines that express the firefly luciferase (LUC) reporter gene under the control of the cardiac sodium-calcium exchanger-1 (Ncx-1) promoter in the background of the 7AC5-EYFP mES cell line that constitutively expresses the enhanced yellow fluorescent protein (EYFP). We compared the ability of recombinant clonal cell lines to express LUC before and after induction of cardiac differentiation in vitro. In particular, one of the clonal cell lines (Ncx-1-43LUC mES cells) showed markedly enhanced LUC expression (45-fold increase) upon induction of cardiac differentiation in vitro. Further, cardiac differentiation in these cells was perpetuated over a period of 2-4 weeks after transplantation in a neonatal mouse heart model, as monitored by noninvasive bioluminescence imaging (BLI) and confirmed via postmortem immunofluorescence and histological assessments. In contrast, transplantation of undifferentiated pluripotent Ncx-1-43LUC mES cells in neonatal hearts did not result in detectable levels of cardiac differentiation in these cells in vivo. These results suggest that prior induction of cardiac differentiation in vitro enhances development and maintenance of a cardiomyocyte-like phenotype for mES cells following transplantation into neonatal mouse hearts in vivo. We conclude that the Ncx-1-43LUC mES cell line is a novel tool for monitoring early cardiac differentiation in vivo using noninvasive BLI.
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Affiliation(s)
- Ramana K Kammili
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, Florida 32827, USA
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38
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Zhang H, Qiao H, Bakken A, Gao F, Huang B, Liu YY, El-Deiry W, Ferrari VA, Zhou R. Utility of dual-modality bioluminescence and MRI in monitoring stem cell survival and impact on post myocardial infarct remodeling. Acad Radiol 2011; 18:3-12. [PMID: 21145025 DOI: 10.1016/j.acra.2010.09.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Revised: 09/07/2010] [Accepted: 09/07/2010] [Indexed: 11/16/2022]
Abstract
RATIONALE AND OBJECTIVES Firefly luciferase (Fluc) reporter gene is an authentic marker for surviving stem cells. However, it is unable to visualize the intramyocardial delivery of stem cells or their impact on cardiac function. The investigators demonstrate that bioluminescence imaging (BLI) combined with magnetic resonance imaging (MRI) allows better assessment of cell delivery and the impact on post-myocardial infarction remodeling. MATERIALS AND METHODS Murine embryonic stem cells (0.3 million) were double-labeled with Fluc and superparamagnetic iron oxide particles and injected into the infarct border zone of athymic rat hearts. BLI and MRI were performed serially up to 2 months after injection, followed by immunohistochemistry. RESULTS Dual-modality imaging was able to verify the initial intramyocardial delivery of the cells and their survival status. Over time, BLI signal increased in seven of nine hearts and disappeared in the other two hearts. The divergence of BLI signal over time was supported by MRI findings. Left ventricular ejection fraction and fractional shortening estimated by MRI suggested that cell engraftment mediated a positive impact on post-myocardial infarction remodeling. Two months after intramyocardial injection, superparamagnetic iron oxide-associated signals facilitated the localization of the injection site. CONCLUSIONS Dual-modality imaging has the unique ability to monitor cell delivery, survival status, graft morphology, and impact on post-myocardial infarction remodeling.
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Affiliation(s)
- Hualei Zhang
- Department of Radiology, University of Pennsylvania, Philadelphia, 19104, USA
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39
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Kraitchman DL, Kedziorek DA, Bulte JWM. MR imaging of transplanted stem cells in myocardial infarction. Methods Mol Biol 2011; 680:141-52. [PMID: 21153379 DOI: 10.1007/978-1-60761-901-7_10] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Recently, several protocols for labeling of stem cells with superparamagnetic iron oxides (SPIOs) have been developed, leading to an active and growing field aimed at visualizing stem cells using MRI (magnetic resonance imaging), including image-guided stem cell injections. This development occurred simultaneously with a significant rise in the number of cell therapy clinical trials for cardiovascular applications and their preceding pre-clinical studies in animal models. In this chapter, we will describe several labeling strategies that can be used to label cells with SPIO nanoparticles. This is followed by a discussion of current strategies for using MRI to visualize these cells in myocardial infarct.
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Affiliation(s)
- Dara L Kraitchman
- Division of MR Research, Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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40
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Kedziorek DA, Kraitchman DL. Superparamagnetic iron oxide labeling of stem cells for MRI tracking and delivery in cardiovascular disease. Methods Mol Biol 2010; 660:171-83. [PMID: 20680819 DOI: 10.1007/978-1-60761-705-1_11] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
In the mid-1980s, iron oxide nanoparticles were developed as contrast agents for diagnostic imaging. In the last two decades, established methods to label cells with superparamagnetic iron oxides (SPIOs) have been developed to aid in targeted delivery and tracking of stem cell therapies. The surge in cellular therapy clinical trials for cardiovascular applications has seen a similar rise in the number of preclinical animal studies of SPIO-labeled stem cells in an effort to understand the mechanisms of cardiovascular regenerative therapy and stem cell biodistribution. The adoption of a limited number of methods of direct labeling of stem cells with SPIOs is due in large part to the desire to rapidly translate these techniques to clinical trials. In this review, we will outline the most commonly adopted methods for iron oxide labeling of stem cells for cardiovascular applications and describe strategies for magnetic resonance imaging (MRI) of magnetically labeled cells in the heart.
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Affiliation(s)
- Dorota A Kedziorek
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University, Baltimore, MD, USA
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Jiang H, Cheng Z, Tian M, Zhang H. In vivo imaging of embryonic stem cell therapy. Eur J Nucl Med Mol Imaging 2010; 38:774-84. [PMID: 21107558 DOI: 10.1007/s00259-010-1667-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2010] [Accepted: 11/01/2010] [Indexed: 12/11/2022]
Abstract
Embryonic stem cells (ESCs) have the most pluripotent potential of any stem cell. These cells, isolated from the inner cell mass of the blastocyst, are "pluripotent," meaning that they can give rise to all cell types within the developing embryo. As a result, ESCs have been regarded as a leading candidate source for novel regenerative medicine therapies and have been used to derive diverse cell populations, including myocardial and endothelial cells. However, before they can be safely applied clinically, it is important to understand the in vivo behavior of ESCs and their derivatives. In vivo analysis of ESC-derived cells remains critically important to define how these cells may function in novel regenerative medicine therapies. In this review, we describe several available imaging modalities for assessing cell engraftment and discuss their strengths and limitations. We also analyze the applications of these modalities in assessing the utility of ESCs in regenerative medicine therapies.
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Affiliation(s)
- Han Jiang
- Department of Nuclear Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou, Zhejiang, 310009, China
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Kedziorek DA, Kraitchman DL. Emerging Approaches for Cardiovascular Stem Cell Imaging. CURRENT CARDIOVASCULAR IMAGING REPORTS 2010. [DOI: 10.1007/s12410-010-9057-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Fu Y, Kraitchman DL. Stem cell labeling for noninvasive delivery and tracking in cardiovascular regenerative therapy. Expert Rev Cardiovasc Ther 2010; 8:1149-60. [PMID: 20670192 DOI: 10.1586/erc.10.106] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Clinical and basic scientific studies of stem cell-based therapies have shown promising results for cardiovascular diseases. Despite a rapid transition from animal studies to clinical trials, the mechanisms by which stem cells improve heart function are yet to be fully elucidated. To optimize cell therapies in patients will require a noninvasive means to evaluate cell survival, biodistribution and fate in the same subject over time. Cell labeling offers the ability to image distinct cell lineages in vivo and investigate the efficacy of these therapies using standard noninvasive imaging techniques. In this article, we will discuss the most promising cell labeling techniques for translation to clinical cardiovascular applications.
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Affiliation(s)
- Yingli Fu
- The Johns Hopkins University School of Medicine, Russell H. Morgan Department of Radiology and Radiological Science, 600 N. Wolfe Street, 314 Park Building, Baltimore, MD 21287, USA
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Vandoorne K, Addadi Y, Neeman M. Visualizing vascular permeability and lymphatic drainage using labeled serum albumin. Angiogenesis 2010; 13:75-85. [PMID: 20512410 DOI: 10.1007/s10456-010-9170-4] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2010] [Accepted: 05/14/2010] [Indexed: 12/21/2022]
Abstract
During the early stages of angiogenesis, following stimulation of endothelial cells by vascular endothelial growth factor (VEGF), the vascular wall is breached, allowing high molecular weight proteins to leak from the vessels to the interstitial space. This hallmark of angiogenesis results in deposition of a provisional matrix, elevation of the interstitial pressure and induction of interstitial convection. Albumin, the major plasma protein appears to be an innocent bystander that is significantly affected by these changes, and thus can be used as a biomarker for vascular permeability associated with angiogenesis. Traditionally, albumin leak in superficial organs was followed by colorimetry or morphometry with the use of albumin binding vital dyes. Over the last years, the introduction of tagged-albumin that can be detected by various imaging methods, such as magnetic resonance imaging and positron emission tomography, opened new possibilities for quantitative three dimension dynamic analysis of permeability in any organ. Using these tools it is now possible to follow not only vascular permeability, but also interstitial convection and lymphatic drain. Active uptake of tagged albumin by caveolae-mediated endocytosis opens the possibility for using labeled albumin for vital staining of cells and cell tracking. This approach was used for monitoring recruitment of perivascular stroma fibroblasts associated with tumor angiogenesis.
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Affiliation(s)
- Katrien Vandoorne
- Department of Biological Regulation, Weizmann Institute, Rehovot, 76100, Israel
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Kramer CM, Sinusas AJ, Sosnovik DE, French BA, Bengel FM. Multimodality imaging of myocardial injury and remodeling. J Nucl Med 2010; 51 Suppl 1:107S-121S. [PMID: 20395347 DOI: 10.2967/jnumed.109.068221] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Advances in cardiovascular molecular imaging have come at a rapid pace over the last several years. Multiple approaches have been taken to better understand the structural, molecular, and cellular events that underlie the progression from myocardial injury to myocardial infarction (MI) and, ultimately, to congestive heart failure. Multimodality molecular imaging including SPECT, PET, cardiac MRI, and optical approaches is offering new insights into the pathophysiology of MI and left ventricular remodeling in small-animal models. Targets that are being probed include, among others, angiotensin receptors, matrix metalloproteinases, integrins, apoptosis, macrophages, and sympathetic innervation. It is only a matter of time before these advances are applied in the clinical setting to improve post-MI prognostication and identify appropriate therapies in patients to prevent the onset of congestive heart failure.
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Affiliation(s)
- Christopher M Kramer
- Departments of Medicine and Radiology, University of Virginia Health System, 1215 Lee St., Box 800170, Charlottesville, VA 22908, USA.
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Abstract
Despite promising preclinical data, the treatment of cardiovascular diseases using embryonic, bone-marrow-derived, and skeletal myoblast stem cells has not yet come to fruition within mainstream clinical practice. Major obstacles in cardiac stem cell investigations include the ability to monitor cell engraftment and survival following implantation within the myocardium. Several cellular imaging modalities, including reporter gene and MRI-based tracking approaches, have emerged that provide the means to identify, localize, and monitor stem cells longitudinally in vivo following implantation. This Review will examine the various cardiac cellular tracking modalities, including the combinatorial use of several probes in multimodality imaging, with a focus on data from the past 5 years.
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Buckle T, van Leeuwen FWB. Validation of intratracheal instillation of lung tumour cells in mice using single photon emission computed tomography/computed tomography imaging. Lab Anim 2009; 44:40-5. [PMID: 19854758 DOI: 10.1258/la.2009.009030] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In search of better predictive animal models for evaluating treatment response in lung cancer, orthotopic lung tumour models are a great step forward over traditional subcutaneous models. Crucial in the development of such orthotopic models is a reliable and reproducible instillation method. Because cells are instilled inside the thorax, the accuracy of the instillation and visualization of tumour growth demands the use of non-invasive imaging methods. We used a minimally invasive intratracheal intubation method to instill bioluminescent lung tumour cells in the lung parenchyma. Adaptation of the cell containing medium provides the possibility of tracing the exact location of the injection by means of single photon emission computed tomography/computed tomography (CT) imaging. The transplantation medium was also optimized to prevent migration of the injected substance. This results in the outgrowth of single and well-defined lung tumours at the instillation site. Finally, tumour growth was validated and longitudinally monitored with a combination of CT and bioluminescence imaging. The reported transplantation procedure enables the assessment of injection accuracy and provides a good approach for the generation of orthotopic lung tumour models for future response imaging studies.
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Affiliation(s)
- Tessa Buckle
- Departments of Radiology and Nuclear Medicine at the Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital, 1066 CX Amsterdam, The Netherlands
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Gianella A, Guerrini U, Tilenni M, Sironi L, Milano G, Nobili E, Vaga S, Capogrossi MC, Tremoli E, Pesce M. Magnetic resonance imaging of human endothelial progenitors reveals opposite effects on vascular and muscle regeneration into ischaemic tissues. Cardiovasc Res 2009; 85:503-13. [DOI: 10.1093/cvr/cvp325] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Pawelczyk E, Jordan EK, Balakumaran A, Chaudhry A, Gormley N, Smith M, Lewis BK, Childs R, Robey PG, Frank JA. In vivo transfer of intracellular labels from locally implanted bone marrow stromal cells to resident tissue macrophages. PLoS One 2009; 4:e6712. [PMID: 19696933 PMCID: PMC2726631 DOI: 10.1371/journal.pone.0006712] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2009] [Accepted: 07/07/2009] [Indexed: 02/06/2023] Open
Abstract
Intracellular labels such as dextran coated superparamagnetic iron oxide nanoparticles (SPION), bromodeoxyuridine (BrdU) or green fluorescent protein (GFP) are frequently used to study the fate of transplanted cells by in vivo magnetic resonance imaging or fluorescent microscopy. Bystander uptake of labeled cells by resident tissue macrophages (TM) can confound the interpretation of the presence of intracellular labels especially during direct implantation of cells, which can result in more than 70% cell death. In this study we determined the percentages of TM that took up SPION, BrdU or GFP from labeled bone marrow stromal cells (BMSCs) that were placed into areas of angiogenesis and inflammation in a mouse model known as Matrigel™ plaque perfusion assay. Cells recovered from digested plaques at various time points were analyzed by fluorescence microscopy and flow cytometry. The analysis of harvested plaques revealed 5% of BrdU+, 5–10% of GFP+ and 5–15% of dextran+ macrophages. The transfer of the label was not dependent on cell dose or viability. Collectively, this study suggests that care should be taken to validate donor origin of cells using an independent marker by histology and to assess transplanted cells for TM markers prior to drawing conclusions about the in vivo behavior of transplanted cells.
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Affiliation(s)
- Edyta Pawelczyk
- Radiology and Imaging Sciences, Clinical Center, National Institutes of Health, Bethesda, Maryland, United States of America.
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Nyolczas N, Charwat S, Posa A, Hemetsberger R, Pavo N, Hemetsberger H, Pavo IJ, Glogar D, Maurer G, Gyöngyösi M. Tracking the migration of cardially delivered therapeutic stem cells in vivo: state of the art. Regen Med 2009; 4:407-22. [PMID: 19438316 DOI: 10.2217/rme.09.14] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Cell-based therapy is a promising, novel therapeutic strategy for cardiovascular disease. The rapid transition of this approach from the benchside to clinical trials has left a gap in the understanding of the mechanisms of cell therapy. Monitoring of cell homing and the fate of cardially delivered stem cells is fundamental for clarification of the myocardial regenerative process. Noninvasive imaging techniques allow an in vivo evaluation of the survival, migration and differentiation of implanted stem cells over time, and by this means, can help to answer unresolved questions. The most promising in vivo tracking methods involve the direct, nonspecific labeling of cells including MRI, radionuclide imaging and the use of reporter-gene imaging. This review summarizes the most important results of animal and human studies in which the fate and biodistribution of cardially delivered stem cells are assessed through different in vivo tracking methods.
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Affiliation(s)
- N Nyolczas
- Department of Cardiology, Medical University of Vienna, Austria
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