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Kashiyama N, Miyagawa S, Fukushima S, Kawamura T, Kawamura A, Yoshida S, Harada A, Watabe T, Kanai Y, Toda K, Hatazawa J, Sawa Y. Development of PET Imaging to Visualize Activated Macrophages Accumulated in the Transplanted iPSc-Derived Cardiac Myocytes of Allogeneic Origin for Detecting the Immune Rejection of Allogeneic Cell Transplants in Mice. PLoS One 2016; 11:e0165748. [PMID: 27930666 PMCID: PMC5145152 DOI: 10.1371/journal.pone.0165748] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 10/16/2016] [Indexed: 12/27/2022] Open
Abstract
Allogeneic transplantation (Tx) of induced pluripotent stem cells (iPSCs) is a promising tissue regeneration therapy. However, this inevitably induces macrophage-mediated immune response against the graft, limiting its therapeutic efficacy. Monitoring the magnitude of the immune response using imaging tools would be useful for prolonging graft survival and increasing the therapy longevity. Minimally invasive quantitative detection of activated macrophages by medical imaging technologies such as positron emission tomography (PET) imaging targets translocator protein (TSPO), which is highly expressed on mitochondrial membrane, especially in activated macrophage. N,N-diethyl-2-[4-(2-fluoroethoxy) phenyl]-5,7-dimethylpyrazolo[1,5-a]pyrimidine-3-acetamide (DPA-714) is known as a TSPO ligand used in clinical settings. We herein hypothesized that immune rejection of the transplanted iPSC-derived cardiomyocytes (iPSC-CMs) of allogeneic origin may be quantitated using 18F-DPA-714-PET imaging study. iPSC-CM cell-sheets of C57BL/6 mice origin were transplanted on the surface of the left ventricle (LV) of C57BL/6 mice as a syngeneic cell-transplant model (syngeneic Tx group), or Balb/c mice as an allogeneic model (allogeneic Tx group). 18F-DPA-714-PET was used to determine the uptake ratio, calculated as the maximum standardized uptake value in the anterior and septal wall of the LV. The uptake ratio was significantly higher in the allogeneic Tx group than in the syngeneic group or the sham group at days 7 and day 10 after the cell transplantation. In addition, the immunochemistry showed significant presence of CD68 and CD3-positive cells at day 7 and 10 in the transplanted graft of the allogeneic Tx group. The expression of TSPO, CD68, IL-1 beta, and MCP-1 was significantly higher in the allogeneic Tx group than in the syngeneic Tx and the sham groups at day 7. The 18F-DPA-714-PET imaging study enabled quantitative visualization of the macrophages-mediated immune rejection of the allogeneic iPSC-cardiac. This imaging tool may enable the understanding and monitoring host-immune response of the host, allogeneic cell transplantation therapy.
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Affiliation(s)
- Noriyuki Kashiyama
- Dept. Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Shigeru Miyagawa
- Dept. Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Satsuki Fukushima
- Dept. Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Takuji Kawamura
- Dept. Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Ai Kawamura
- Dept. Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Shohei Yoshida
- Dept. Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Akima Harada
- Dept. Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Tadashi Watabe
- Dept. Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan
- PET Molecular Imaging Center, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yasukazu Kanai
- Dept. Molecular Imaging in Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Koichi Toda
- Dept. Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Jun Hatazawa
- Dept. Nuclear Medicine and Tracer Kinetics, Osaka University Graduate School of Medicine, Osaka, Japan
- PET Molecular Imaging Center, Osaka University Graduate School of Medicine, Osaka, Japan
- Immunology Frontier Research Center, Osaka University, Osaka, Japan
| | - Yoshiki Sawa
- Dept. Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
- * E-mail:
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Padda J, Sequiera GL, Sareen N, Dhingra S. Stem cell therapy for cardiac regeneration: hits and misses. Can J Physiol Pharmacol 2015; 93:835-41. [DOI: 10.1139/cjpp-2014-0468] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cardiac injury and loss of cardiomyocytes is a causative as well as a resultant condition of cardiovascular disorders, which are the leading cause of death throughout the world. This loss of cardiomyocytes cannot be completely addressed through the currently available drugs being administered, which mainly function only in relieving the symptoms. There is a huge potential being investigated for regenerative and cell replacement therapies through recruiting stem cells of various origins namely embryonic, reprogramming/induction, and adult tissue. These sources are being actively studied for translation to clinical scenarios. In this review, we attempt to discuss some of these promising scenarios, including the clinical trials and the obstacles that need to be overcome, and hope to address the direction in which stem cell therapy is heading.
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Affiliation(s)
- Jagjit Padda
- Institute of Cardiovascular Sciences, St. Boniface General Hospital Research Centre, Regenerative Medicine Program, College of Medicine, Faculty of Health Sciences, University of Manitoba, R 3028-2, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
- Institute of Cardiovascular Sciences, St. Boniface General Hospital Research Centre, Regenerative Medicine Program, College of Medicine, Faculty of Health Sciences, University of Manitoba, R 3028-2, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
| | - Glen Lester Sequiera
- Institute of Cardiovascular Sciences, St. Boniface General Hospital Research Centre, Regenerative Medicine Program, College of Medicine, Faculty of Health Sciences, University of Manitoba, R 3028-2, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
- Institute of Cardiovascular Sciences, St. Boniface General Hospital Research Centre, Regenerative Medicine Program, College of Medicine, Faculty of Health Sciences, University of Manitoba, R 3028-2, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
| | - Niketa Sareen
- Institute of Cardiovascular Sciences, St. Boniface General Hospital Research Centre, Regenerative Medicine Program, College of Medicine, Faculty of Health Sciences, University of Manitoba, R 3028-2, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
- Institute of Cardiovascular Sciences, St. Boniface General Hospital Research Centre, Regenerative Medicine Program, College of Medicine, Faculty of Health Sciences, University of Manitoba, R 3028-2, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
| | - Sanjiv Dhingra
- Institute of Cardiovascular Sciences, St. Boniface General Hospital Research Centre, Regenerative Medicine Program, College of Medicine, Faculty of Health Sciences, University of Manitoba, R 3028-2, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
- Institute of Cardiovascular Sciences, St. Boniface General Hospital Research Centre, Regenerative Medicine Program, College of Medicine, Faculty of Health Sciences, University of Manitoba, R 3028-2, 351 Tache Avenue, Winnipeg, MB R2H 2A6, Canada
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