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Wang H, Mao X, Zhong Y, Zhao X, Li C, Jiang J, Hong Z, Wang N, Wang F. Human amniotic mesenchymal stem cells inhibit immune rejection injury from allogeneic mouse heart transplantation: A preliminary study on the microRNA expression. Transpl Immunol 2024; 84:102022. [PMID: 38452986 DOI: 10.1016/j.trim.2024.102022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 02/08/2024] [Accepted: 03/03/2024] [Indexed: 03/09/2024]
Abstract
BACKGROUND Mesenchymal stem cell therapy is a new treatment for immune rejection in heart transplantation. The aim of this paper is to investigate the effect of human amniotic mesenchymal stem cells (hAMSCs) on alleviating immune rejection of allogeneic heart transplantation in mice and its possible underlying mechanism. METHODS We injected hAMSCs into cervical ectopic heart transplantation model mice via tail vein to observe the survival time, the pathological changes of donor myocardium, and the fluorescent distribution of hAMSCs after the transplantation. MicroRNAs (miRs) with significantly differential expression were obtained by RNA sequencing and bioinformatic analysis, and a dual luciferase reporter gene assay together with real-time quantitative PCR (qRT-PCR) was performed to verify the relationship between miRs and their targeting genes. RESULTS The intervention of hAMSCs prolonged the graft survival time and alleviated the pathological damage of the donor heart. The injected hAMSCs were distributed mainly in the liver, spleen, and kidney, only a very small portion in the donor and recipient hearts. In the allogeneic transplantation models, the expression of miR-34b-5p significantly increased after hAMSC treatment. MiR-34b-5p showed a knockdown effect on gene Fc gamma receptor 2B (FCGR2B). CONCLUSIONS hAMSCs can reduce the immune rejection injury after allogeneic heart transplantation. This effect may be associated with the upregulation of miR-34b-5p expression to knock down its targeting gene FCGR2B.
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Affiliation(s)
- Haoyuan Wang
- Department of Cardiothoracic Surgery, The Second Affiliated Hospital of Zunyi Medical University, Zunyi 563006, Guizhou, China; The Second Clinical Institute, Zunyi Medical University, Zunyi 563006, Guizhou, China; Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi 563003, Guizhou, China
| | - Xin Mao
- Department of Clinical Medical College, Zunyi Medical University, Zunyi 563006, Guizhou, China; Department of Gastroenterology, Digestive Disease Hospital, Affiliated Hospital of Zunyi Medical University, Zunyi 563003, Guizhou, China
| | - Yue Zhong
- Department of Cardiothoracic Surgery, The Second Affiliated Hospital of Zunyi Medical University, Zunyi 563006, Guizhou, China; The Second Clinical Institute, Zunyi Medical University, Zunyi 563006, Guizhou, China
| | - Xu Zhao
- Department of Clinical Medical College, Zunyi Medical University, Zunyi 563006, Guizhou, China
| | - Chuntian Li
- Department of Clinical Medical College, Zunyi Medical University, Zunyi 563006, Guizhou, China
| | - Jun Jiang
- Department of Cardiothoracic Surgery, The Second Affiliated Hospital of Zunyi Medical University, Zunyi 563006, Guizhou, China; The Second Clinical Institute, Zunyi Medical University, Zunyi 563006, Guizhou, China
| | - Zheng Hong
- Department of Cardiothoracic Surgery, The Second Affiliated Hospital of Zunyi Medical University, Zunyi 563006, Guizhou, China; The Second Clinical Institute, Zunyi Medical University, Zunyi 563006, Guizhou, China
| | - Nuoxin Wang
- Key Laboratory of Cell Engineering of Guizhou Province, Affiliated Hospital of Zunyi Medical University, Zunyi 563003, Guizhou, China; The Clinical Stem Cell Research Institute, Affiliated Hospital of Zunyi Medical University, Zunyi 563003, Guizhou, China; Collaborative Innovation Center of Chinese Ministry of Education, Zunyi Medical University, Zunyi 563003, Guizhou, China.
| | - Feng Wang
- Department of Cardiothoracic Surgery, The Second Affiliated Hospital of Zunyi Medical University, Zunyi 563006, Guizhou, China; The Second Clinical Institute, Zunyi Medical University, Zunyi 563006, Guizhou, China; Department of Cardiovascular Surgery, Affiliated Hospital of Guizhou Medical University, Guiyang 550004, Guizhou, China.
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Rey K, Manku S, Enns W, Van Rossum T, Bushell K, Morin RD, Brinkman FSL, Choy JC. Disruption of the Gut Microbiota With Antibiotics Exacerbates Acute Vascular Rejection. Transplantation 2019. [PMID: 29538261 DOI: 10.1097/tp.0000000000002169] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND The gut microbiota influences many immunological processes but how its disruption affects transplant rejection is poorly understood. METHODS Interposition grafting of aortic segments was used to examine vascular rejection. The gut microbiota was disrupted in graft recipients using an antibiotic cocktail (ampicillin, vancomycin, metronidazole, neomycin sulfate) in their drinking water. RESULTS Treatment of mice with antibiotics severely reduced total bacterial content in the intestine and disrupted the bacterial composition. Short-term treatment of mice for only the first 3 weeks of life resulted in the population of the intestine in mature mice with bacterial communities that were mildly different from untreated mice, containing slightly more Clostridia and less Bacteroides. Antibiotic disruption of the gut microbiota of graft recipients, either for their entire life or only during the first 3 weeks of life, resulted in increased medial injury of allograft arteries that is reflective of acute vascular rejection but did not affect intimal thickening reflective of transplant arteriosclerosis. Exacerbated vascular rejection resulting from disruption of the gut microbiota was related to increased infiltration of allograft arteries by neutrophils. CONCLUSIONS Disruption of the gut microbiota early in life results in exacerbation of immune responses that cause acute vascular rejection.
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Affiliation(s)
- Kevin Rey
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Sukhbir Manku
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Winnie Enns
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Thea Van Rossum
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Kevin Bushell
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Ryan D Morin
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Fiona S L Brinkman
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada
| | - Jonathan C Choy
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada
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von Rossum A, Laher I, Choy JC. Immune-mediated vascular injury and dysfunction in transplant arteriosclerosis. Front Immunol 2015; 5:684. [PMID: 25628623 PMCID: PMC4290675 DOI: 10.3389/fimmu.2014.00684] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Accepted: 12/18/2014] [Indexed: 12/16/2022] Open
Abstract
Solid organ transplantation is the only treatment for end-stage organ failure but this life-saving procedure is limited by immune-mediated rejection of most grafts. Blood vessels within transplanted organs are targeted by the immune system and the resultant vascular damage is a main contributor to acute and chronic graft failure. The vasculature is a unique tissue with specific immunological properties. This review discusses the interactions of the immune system with blood vessels in transplanted organs and how these interactions lead to the development of transplant arteriosclerosis, a leading cause of heart transplant failure.
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Affiliation(s)
- Anna von Rossum
- Department of Molecular Biology and Biochemistry, Simon Fraser University , Burnaby, BC , Canada
| | - Ismail Laher
- Department of Anaesthesiology, Pharmacology and Therapeutics, University of British Columbia , Vancouver, BC , Canada
| | - Jonathan C Choy
- Department of Molecular Biology and Biochemistry, Simon Fraser University , Burnaby, BC , Canada
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Khazaei M, Moien-Afshari F, Laher I. Vascular endothelial function in health and diseases. ACTA ACUST UNITED AC 2008; 15:49-67. [PMID: 18434105 DOI: 10.1016/j.pathophys.2008.02.002] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2007] [Revised: 02/07/2008] [Accepted: 02/08/2008] [Indexed: 11/30/2022]
Abstract
The vascular endothelium constitutes approximately 1% of body mass (1kg) and has a surface area of approximately 5000m(2). The endothelium is a multifunctional endocrine organ strategically placed between the vessel wall and the circulating blood, and has a key role in vascular homeostasis. The endothelium is both a target for and mediator of cardiovascular disease. The endothelium releases several relaxing and constricting factors, which can affect vascular homeostasis. Endothelial dysfunction, whether caused by physical injury or cellular damage, leads to compensatory responses that alter the normal homeostatic properties of the endothelium. In this review, we summarized some physiological aspects of endothelial function and then we discussed endothelial dysfunction during some pathological conditions.
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Affiliation(s)
- M Khazaei
- Department of Physiology, Isfahan University of Medical Sciences, Isfahan, Iran
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Moien-Afshari F, Skarsgard PL, McManus BM, Laher I. Cardiac transplantation and resistance artery myogenic tone. Can J Physiol Pharmacol 2005; 82:840-8. [PMID: 15573144 DOI: 10.1139/y04-100] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Transplantation is an effective treatment for end-stage heart disease; however, most grafts eventually fail by progressive cardiac failure. Primarily, failure is ischemic due to the occlusive nature of transplant vascular disease (TVD). Early after transplantation and preceding TVD, alterations in coronary physiology such as reduced vascular myogenic tone occur. Resistance arteries possess an inherent ability to constrict in response to transmural pressure; this constrictive response (myogenic tone) is important in fluid homeostasis. Recent evidence suggests that a decline in myogenic tone leads to deficits in cardiac contractility. Factors that reduce myogenic tone in transplantation include constitutive nitric oxide synthase and inducible nitric oxide synthase catalyzed, NO-mediated vasodilation as well as deficits in arterial contractile function. Reduced myogenic tone in allograft resistance arteries increases coronary blood flow such that hydrostatic pressure surpasses oncotic pressure, causing cardiac interstitial edema. This generalized edema decreases ventricular compliance leading to heart failure during the course of acute immune rejection of the graft. Cyclosporine A treatment reduces immune mediated dysregulation of myogenic tone, resulting in reduced interstitial edema and improved cardiac function. In this review, we discuss aspects of TVD and myogenic tone signaling mechanisms and how aberrations in myogenic regulation of arterial tone contribute to functional changes observed in cardiac transplant.
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Affiliation(s)
- Farzad Moien-Afshari
- Department of Pharmacology and Therapeutics, Faculty of Medicine, University of British Columbia, Vancouver, Canada
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Choy JC, Cruz RP, Kerjner A, Geisbrecht J, Sawchuk T, Fraser SA, Hudig D, Bleackley RC, Jirik FR, McManus BM, Granville DJ. Granzyme B induces endothelial cell apoptosis and contributes to the development of transplant vascular disease. Am J Transplant 2005; 5:494-9. [PMID: 15707403 DOI: 10.1111/j.1600-6143.2004.00710.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Endothelial cell death induced by cytotoxic T cells is a key initiating event in the development of transplant vascular disease (TVD), the leading cause of late solid organ transplant failure. We studied the role of the granzyme B (GrB) pathwaye, which is one of the main mechanisms by which T cells induce apoptosis of allogeneic targets, in the pathogenesis of TVD. Granzyme B, in combination with perforin (pfn), induced apoptosis of cultured endothelial cells. In hearts transplanted into GrB knockout (GrB-KO) mice, there was a similar level of vasculitis as compared to WT mice, indicating that GrB does not affect immune infiltration into allograft arteries. However, there was a significant reduction in luminal narrowing of allograft arteries from GrB-KO mice as compared to WT recipients. These results indicate that GrB plays a role in endothelial cell death in allograft arteries and in the resultant development of TVD.
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Affiliation(s)
- Jonathan C Choy
- James Hogg iCAPTURE Centre for Cardiovascular and Pulmonary Research, St. Paul's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
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Choy JC, Hung VHY, Hunter AL, Cheung PK, Motyka B, Goping IS, Sawchuk T, Bleackley RC, Podor TJ, McManus BM, Granville DJ. Granzyme B Induces Smooth Muscle Cell Apoptosis in the Absence of Perforin. Arterioscler Thromb Vasc Biol 2004; 24:2245-50. [PMID: 15472125 DOI: 10.1161/01.atv.0000147162.51930.b7] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE T cell-induced cytotoxicity, of which granzyme B is a key mediator, is believed to contribute to the pathogenesis of inflammatory vascular diseases. In this report, we investigate the mechanism of granzyme B-induced smooth muscle cell (SMC) death. METHODS AND RESULTS The addition of purified granzyme B alone to cultured SMCs caused a significant reduction in cell viability. Chromatin condensation, phosphatidylserine externalization, and membrane blebbing were observed, indicating that the mechanism of granzyme B-induced SMC death was through apoptosis. Activated splenocytes from perforin-knockout mice induced SMC death through a granzyme B-mediated pathway. Inhibition of the proteolytic activities of caspases and granzyme B prevented granzyme B-induced SMC death, whereas attenuation of granzyme B internalization with mannose-6-phosphate (M6P) did not. Further, granzyme B induced the cleavage of several SMC extracellular proteins, including fibronectin, and reduced focal adhesion kinase phosphorylation. CONCLUSIONS These results indicate that granzyme B can induce apoptosis of SMCs in the absence of perforin by cleaving extracellular proteins, such as fibronectin.
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Affiliation(s)
- Jonathan C Choy
- The James Hogg iCAPTURE Centre for Cardiovascular and Pulmonary Research, Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
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Choy JC, Kerjner A, Wong BW, McManus BM, Granville DJ. Perforin mediates endothelial cell death and resultant transplant vascular disease in cardiac allografts. THE AMERICAN JOURNAL OF PATHOLOGY 2004; 165:127-33. [PMID: 15215168 PMCID: PMC1618552 DOI: 10.1016/s0002-9440(10)63281-6] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
T cell-induced endothelial injury is an important event in the development of transplant vascular disease (TVD), the leading expression of chronic rejection of vascularized organ transplants. However, the precise contribution of perforin to vascular damage in allografts and resultant TVD has not been addressed in vivo. Minor histocompatability antigen mismatched mouse heterotopic cardiac transplants were performed from 129J donors into C57Bl/6 (wild-type (WT)) or perforin knockout (PKO) recipients. Perforin was abundant in immune infiltrates in the myocardium and vasculature of transplanted hearts in WT mice. Allograft coronary arteries in both WT and PKO mice had considerable vasculitis. There was also marked endothelial disruption, as well as TUNEL-positivity in the endothelial region, in coronary arteries of hearts transplanted into WT mice that was not evident in PKO recipients (P = 0.05). At 30 days post-transplantation, intimal thickening was assessed on elastic Van Gieson-stained ventricular sections. There was an average of 54.2 +/- 6.7% luminal narrowing of coronary arteries in allografts from WT mice as compared to 13.4 +/- 5.1% luminal narrowing in PKO counterparts (P < 0.00002). In summary, perforin plays a primary role in endothelial damage and the resultant onset and progression of TVD.
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Affiliation(s)
- Jonathan C Choy
- James Hogg iCAPTURE Centre for Cardiovascular and Pulmonary Research, St. Paul's Hospital/University of British Columbia, 1081 Burrard Street, Vancouver, BC, Canada V6Z 1Y6
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