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Shi C, Zhang K, Zhao Z, Wang Y, Xu H, Wei W. Correlation between stem cell molecular phenotype and atherosclerotic plaque neointima formation and analysis of stem cell signal pathways. Front Cell Dev Biol 2023; 11:1080563. [PMID: 36711040 PMCID: PMC9877345 DOI: 10.3389/fcell.2023.1080563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 01/02/2023] [Indexed: 01/14/2023] Open
Abstract
Vascular stem cells exist in the three-layer structure of blood vessel walls and play an indispensable role in angiogenesis under physiological conditions and vascular remodeling under pathological conditions. Vascular stem cells are mostly quiescent, but can be activated in response to injury and participate in endothelial repair and neointima formation. Extensive studies have demonstrated the differentiation potential of stem/progenitor cells to repair endothelium and participate in neointima formation during vascular remodeling. The stem cell population has markers on the surface of the cells that can be used to identify this cell population. The main positive markers include Stem cell antigen-1 (Sca1), Sry-box transcription factor 10 (SOX10). Stromal cell antigen 1 (Stro-1) and Stem cell growth factor receptor kit (c-kit) are still controversial. Different parts of the vessel have different stem cell populations and multiple markers. In this review, we trace the role of vascular stem/progenitor cells in the progression of atherosclerosis and neointima formation, focusing on the expression of stem cell molecular markers that occur during neointima formation and vascular repair, as well as the molecular phenotypic changes that occur during differentiation of different stem cell types. To explore the correlation between stem cell molecular markers and atherosclerotic diseases and neointima formation, summarize the differential changes of molecular phenotype during the differentiation of stem cells into smooth muscle cells and endothelial cells, and further analyze the signaling pathways and molecular mechanisms of stem cells expressing different positive markers participating in intima formation and vascular repair. Summarizing the limitations of stem cells in the prevention and treatment of atherosclerotic diseases and the pressing issues that need to be addressed, we provide a feasible scheme for studying the signaling pathways of vascular stem cells involved in vascular diseases.
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Affiliation(s)
- Chuanxin Shi
- Division of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Kefan Zhang
- Division of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Zhenyu Zhao
- Division of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yifan Wang
- Division of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Haozhe Xu
- Department of Biotherapy, Medical Center for Digestive Diseases, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Wei Wei
- Division of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China,*Correspondence: Wei Wei,
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Tao J, Cao X, Yu B, Qu A. Vascular Stem/Progenitor Cells in Vessel Injury and Repair. Front Cardiovasc Med 2022; 9:845070. [PMID: 35224067 PMCID: PMC8866648 DOI: 10.3389/fcvm.2022.845070] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 01/17/2022] [Indexed: 11/13/2022] Open
Abstract
Vascular repair upon vessel injury is essential for the maintenance of arterial homeostasis and function. Stem/progenitor cells were demonstrated to play a crucial role in regeneration and replenishment of damaged vascular cells during vascular repair. Previous studies revealed that myeloid stem/progenitor cells were the main sources of tissue regeneration after vascular injury. However, accumulating evidences from developing lineage tracing studies indicate that various populations of vessel-resident stem/progenitor cells play specific roles in different process of vessel injury and repair. In response to shear stress, inflammation, or other risk factors-induced vascular injury, these vascular stem/progenitor cells can be activated and consequently differentiate into different types of vascular wall cells to participate in vascular repair. In this review, mechanisms that contribute to stem/progenitor cell differentiation and vascular repair are described. Targeting these mechanisms has potential to improve outcome of diseases that are characterized by vascular injury, such as atherosclerosis, hypertension, restenosis, and aortic aneurysm/dissection. Future studies on potential stem cell-based therapy are also highlighted.
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Affiliation(s)
- Jiaping Tao
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
- The Key Laboratory of Cardiovascular Remodeling-Related Diseases, Ministry of Education, Beijing, China
- Beijing Key Laboratory of Metabolic Disorder-Related Cardiovascular Diseases, Beijing, China
| | - Xuejie Cao
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
- The Key Laboratory of Cardiovascular Remodeling-Related Diseases, Ministry of Education, Beijing, China
- Beijing Key Laboratory of Metabolic Disorder-Related Cardiovascular Diseases, Beijing, China
| | - Baoqi Yu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
- The Key Laboratory of Cardiovascular Remodeling-Related Diseases, Ministry of Education, Beijing, China
- Beijing Key Laboratory of Metabolic Disorder-Related Cardiovascular Diseases, Beijing, China
- *Correspondence: Baoqi Yu
| | - Aijuan Qu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
- The Key Laboratory of Cardiovascular Remodeling-Related Diseases, Ministry of Education, Beijing, China
- Beijing Key Laboratory of Metabolic Disorder-Related Cardiovascular Diseases, Beijing, China
- Aijuan Qu
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Aschacher T, Schmidt K, Aschacher O, Eichmair E, Baranyi U, Winkler B, Grabenwoeger M, Spittler A, Enzmann F, Messner B, Riebandt J, Laufer G, Bergmann M, Ehrlich M. Telocytes in the human ascending aorta: Characterization and exosome-related KLF-4/VEGF-A expression. J Cell Mol Med 2021; 25:9697-9709. [PMID: 34562312 PMCID: PMC8505852 DOI: 10.1111/jcmm.16919] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 08/22/2021] [Accepted: 09/01/2021] [Indexed: 12/13/2022] Open
Abstract
Telocytes (TCs), a novel interstitial cell entity promoting tissue regeneration, have been described in various tissues. Their role in inter‐cellular signalling and tissue remodelling has been reported in almost all human tissues. This study hypothesizes that TC also contributes to tissue remodelling and regeneration of the human thoracic aorta (HTA). The understanding of tissue homeostasis and regenerative potential of the HTA is of high clinical interest as it plays a crucial role in pathogenesis from aortic dilatation to lethal dissection. Therefore, we obtained twenty‐five aortic specimens of heart donors during transplantation. The presence of TCs was detected in different layers of aortic tissue and characterized by immunofluorescence and transmission electron microscopy. Further, we cultivated and isolated TCs in highly differentiated form identified by positive staining for CD34 and c‐kit. Aortic‐derived TC was characterized by the expression of PDGFR‐α, PDGFR‐β, CD29/integrin β‐1 and αSMA and the stem cell markers Nanog and KLF‐4. Moreover, TC exosomes were isolated and characterized for soluble angiogenic factors by Western blot. CD34+/c‐kit+ TCs shed exosomes containing the soluble factors VEGF‐A, KLF‐4 and PDGF‐A. In summary, TC occurs in the aortic wall. Correspondingly, exosomes, derived from aortic TCs, contain vasculogenesis‐relevant proteins. Understanding the regulation of TC‐mediated aortic remodelling may be a crucial step towards designing strategies to promote aortic repair and prevent adverse remodelling.
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Affiliation(s)
- Thomas Aschacher
- Department of Cardio-Vascular Surgery, Clinic Floridsdorf and Karl Landsteiner Institute for Cardio-Vascular Research, Vienna, Austria
| | - Katy Schmidt
- Centre for Anatomy and Cell Biology, Medical University of Vienna, Vienna, Austria
| | - Olivia Aschacher
- Department of Plastic, Reconstructive and Aesthetic Surgery, Medical University of Vienna, Vienna, Austria
| | - Eva Eichmair
- Cardiac Surgery Research Laboratory, Department of Cardiac Surgery, Medical University of Vienna, Vienna, Austria
| | - Ulrike Baranyi
- Cardiac Surgery Research Laboratory, Department of Cardiac Surgery, Medical University of Vienna, Vienna, Austria
| | - Bernhard Winkler
- Department of Cardio-Vascular Surgery, Clinic Floridsdorf and Karl Landsteiner Institute for Cardio-Vascular Research, Vienna, Austria
| | - Martin Grabenwoeger
- Department of Cardio-Vascular Surgery, Clinic Floridsdorf and Karl Landsteiner Institute for Cardio-Vascular Research, Vienna, Austria
| | - Andreas Spittler
- Department of General Surgery, Medical University of Vienna, Vienna, Austria
| | - Florian Enzmann
- Department of Vascular Surgery, Medical University of Innsbruck, Innsbruck, Austria
| | - Barbara Messner
- Cardiac Surgery Research Laboratory, Department of Cardiac Surgery, Medical University of Vienna, Vienna, Austria
| | - Julia Riebandt
- Cardiac Surgery Research Laboratory, Department of Cardiac Surgery, Medical University of Vienna, Vienna, Austria
| | - Guenther Laufer
- Cardiac Surgery Research Laboratory, Department of Cardiac Surgery, Medical University of Vienna, Vienna, Austria
| | - Michael Bergmann
- Department of General Surgery, Medical University of Vienna, Vienna, Austria
| | - Marek Ehrlich
- Cardiac Surgery Research Laboratory, Department of Cardiac Surgery, Medical University of Vienna, Vienna, Austria
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Díaz-Flores L, Gutiérrez R, García MP, González-Gómez M, Díaz-Flores L, Álvarez-Argüelles H, Luis Carrasco J. Presence/Absence and Specific Location of Resident CD34+ Stromal Cells/Telocytes Condition Stromal Cell Development in Repair and Tumors. Front Cell Dev Biol 2020; 8:544845. [PMID: 33072740 PMCID: PMC7530324 DOI: 10.3389/fcell.2020.544845] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Accepted: 08/21/2020] [Indexed: 12/12/2022] Open
Abstract
CD34+ stromal cells/telocytes (CD34+SCs/TCs) can have a role as mesenchymal precursor cells. Our objective is to assess whether the myofibroblastic stromal cell response in repair and in desmoplastic reactions in tumors depend on the presence or absence of resident CD34+SCs/TCs in specific regions/layers of an organ and on the location of their possible subpopulations. For this purpose, using conventional and immunohistochemical procedures, we studied specimens of (a) acute cholecystitis, with early repair phenomena (n: 6), (b) surgically resected segments of colon tattooed with India ink during previous endoscopic removal of malignant polyps, with macrophage infiltration and stromal cell reaction (n: 8) and (c) infiltrative adenocarcinomas of colon, with desmoplastic reaction (n: 8). The results demonstrated (a) stromal myofibroblastic reaction during repair and tumor desmoplasia in most regions in which resident CD34+SCs/TCs are present, (b) absence of stromal myofibroblastic reaction during repair in the mucosa of both organs in which resident CD34+SCs/TCs are absent and (c) permanence of CD34+SCs/TCs as such, without myofibroblastic response, in smooth muscle fascicles, nerves, and Meissner and Auerbach plexuses, in which the CD34+SCs/TCs mainly undergo reactive phenomena. Therefore, the development of activated αSMA+ myofibroblasts in these conditions requires the presence of resident CD34+SCs/TCs and depends on their location. In conclusion, the facts support the hypotheses that CD34+SCs/TCs participate in the origin of myofibroblasts during repair and tumor stroma formation, and that there is a heterogeneous population of resident CD34+SCs/TCs with different roles.
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Affiliation(s)
- Lucio Díaz-Flores
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - Ricardo Gutiérrez
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - Ma Pino García
- Department of Pathology, Eurofins® Megalab-Hospiten Hospitals, Tenerife, Spain
| | - Miriam González-Gómez
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - Lucio Díaz-Flores
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - Hugo Álvarez-Argüelles
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, Tenerife, Spain
| | - José Luis Carrasco
- Department of Basic Medical Sciences, Faculty of Medicine, University of La Laguna, Tenerife, Spain
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Dubey RK, Baruscotti I, Stiller R, Fingerle J, Gillespie DG, Mi Z, Leeners B, Imthurn B, Rosselli M, Jackson EK. Adenosine, Via A 2B Receptors, Inhibits Human (P-SMC) Progenitor Smooth Muscle Cell Growth. Hypertension 2019; 75:109-118. [PMID: 31786976 DOI: 10.1161/hypertensionaha.119.13698] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
c-Kit+ progenitor smooth muscle cells (P-SMCs) can develop into SMCs that contribute to injury-induced neointimal thickening. Here, we investigated whether adenosine reduces P-SMC migration and proliferation and whether this contributes to adenosine's inhibitory actions on neointima formation. In human P-SMCs, 2-chloroadenosine (stable adenosine analogue) and BAY60-6583 (A2B agonist) inhibited P-SMC proliferation and migration. Likewise, increasing endogenous adenosine by blocking adenosine metabolism with erythro-9-(2-hydroxy-3-nonyl) adenine (inhibits adenosine deaminase) and 5-iodotubercidin (inhibits adenosine kinase) attenuated P-SMC proliferation and migration. Neither N6-cyclopentyladenosine (A1 agonist), CGS21680 (A2A agonist), nor N6-(3-iodobenzyl)-adenosine-5'-N-methyluronamide (A3 agonist) affected P-SMC proliferation or migration. 2-Chloroadenosine increased cyclic AMP, reduced Akt phosphorylation (activates cyclin D expression), and reduced levels of cyclin D1 (promotes cell-cycle progression). Moreover, 2-chloroadenosine inhibited expression of Skp2 (promotes proteolysis of p27Kip1) and upregulated levels of p27Kip1 (negative cell-cycle regulator). A2B receptor knockdown prevented the effects of 2-chloroadenosine on cyclic AMP production and P-SMC proliferation and migration. Likewise, inhibition of adenylyl cyclase and protein kinase A rescued P-SMCs from the inhibitory effects of 2-chloroadenosine. The inhibitory effects of adenosine were similar in male and female P-SMCs. In vivo, peri-arterial (rat carotid artery) 2-chloroadenosine (20 μmol/L for 7 days) reduced neointimal hyperplasia by 64.5% (P<0.05; intima/media ratio: control, 1.4±0.02; treated, 0.53±0.012) and reduced neointimal c-Kit+ cells. Adenosine inhibits P-SMC migration and proliferation via the A2B receptor/cyclic AMP/protein kinase A axis, which reduces cyclin D1 expression and activity via inhibiting Akt phosphorylation and Skp2 expression and upregulating p27kip1 levels. Adenosine attenuates neointima formation in part by inhibiting infiltration and proliferation of c-Kit+ P-SMCs.
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Affiliation(s)
- Raghvendra K Dubey
- From the Department of Obstetrics and Gynecology, Clinic for Reproductive Endocrinology, University Hospital Zurich (R.K.D., I.B., R.S., B.L., B.I., M.R.).,Zurich Center for Integrative Human Physiology (ZIHP), University of Zurich, Switzerland (R.K.D.).,Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine (R.K.D., D.G.G., Z.M., E.K.J.)
| | - Isabella Baruscotti
- From the Department of Obstetrics and Gynecology, Clinic for Reproductive Endocrinology, University Hospital Zurich (R.K.D., I.B., R.S., B.L., B.I., M.R.)
| | - Ruth Stiller
- From the Department of Obstetrics and Gynecology, Clinic for Reproductive Endocrinology, University Hospital Zurich (R.K.D., I.B., R.S., B.L., B.I., M.R.)
| | - Juergen Fingerle
- NMI Naturwissenschaftliches und Medizinisches Institut an der Universität Tübingen, Reutlingen, Germany (J.F.)
| | - Delbert G Gillespie
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine (R.K.D., D.G.G., Z.M., E.K.J.)
| | - Zaichuan Mi
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine (R.K.D., D.G.G., Z.M., E.K.J.)
| | - Brigitte Leeners
- From the Department of Obstetrics and Gynecology, Clinic for Reproductive Endocrinology, University Hospital Zurich (R.K.D., I.B., R.S., B.L., B.I., M.R.)
| | - Bruno Imthurn
- From the Department of Obstetrics and Gynecology, Clinic for Reproductive Endocrinology, University Hospital Zurich (R.K.D., I.B., R.S., B.L., B.I., M.R.)
| | - Marinella Rosselli
- From the Department of Obstetrics and Gynecology, Clinic for Reproductive Endocrinology, University Hospital Zurich (R.K.D., I.B., R.S., B.L., B.I., M.R.)
| | - Edwin K Jackson
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine (R.K.D., D.G.G., Z.M., E.K.J.)
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Lu W, Li X. PDGFs and their receptors in vascular stem/progenitor cells: Functions and therapeutic potential in retinal vasculopathy. Mol Aspects Med 2018; 62:22-32. [DOI: 10.1016/j.mam.2017.10.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 10/04/2017] [Indexed: 02/07/2023]
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Abstract
Vascular, resident stem cells are present in all 3 layers of the vessel wall; they play a role in vascular formation under physiological conditions and in remodeling in pathological situations. Throughout development and adult early life, resident stem cells participate in vessel formation through vasculogenesis and angiogenesis. In adults, the vascular stem cells are mostly quiescent in their niches but can be activated in response to injury and participate in endothelial repair and smooth muscle cell accumulation to form neointima. However, delineation of the characteristics and of the migration and differentiation behaviors of these stem cells is an area of ongoing investigation. A set of genetic mouse models for cell lineage tracing has been developed to specifically address the nature of these cells and both migration and differentiation processes during physiological angiogenesis and in vascular diseases. This review summarizes the current knowledge on resident stem cells, which has become more defined and refined in vascular biology research, thus contributing to the development of new potential therapeutic strategies to promote endothelial regeneration and ameliorate vascular disease development.
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Affiliation(s)
- Li Zhang
- From the Department of Cardiology, the First Affiliated Hospital, School of Medicine, Zhejiang University, China (L.Z., T.C., Q.X.)
| | - Shirin Issa Bhaloo
- School of Cardiovascular Medicine and Sciences, King’s College London, BHF Centre, United Kingdom (S.I.B., Q.X.)
| | - Ting Chen
- From the Department of Cardiology, the First Affiliated Hospital, School of Medicine, Zhejiang University, China (L.Z., T.C., Q.X.)
| | - Bin Zhou
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academic of Sciences (B.Z.)
| | - Qingbo Xu
- From the Department of Cardiology, the First Affiliated Hospital, School of Medicine, Zhejiang University, China (L.Z., T.C., Q.X.)
- School of Cardiovascular Medicine and Sciences, King’s College London, BHF Centre, United Kingdom (S.I.B., Q.X.)
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Roostalu U, Wong JK. Arterial smooth muscle dynamics in development and repair. Dev Biol 2018; 435:109-121. [PMID: 29397877 DOI: 10.1016/j.ydbio.2018.01.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2017] [Revised: 01/08/2018] [Accepted: 01/24/2018] [Indexed: 12/11/2022]
Abstract
Arterial vasculature distributes blood from early embryonic development and provides a nutrient highway to maintain tissue viability. Atherosclerosis, peripheral artery diseases, stroke and aortic aneurysm represent the most frequent causes of death and are all directly related to abnormalities in the function of arteries. Vascular intervention techniques have been established for the treatment of all of these pathologies, yet arterial surgery can itself lead to biological changes in which uncontrolled arterial wall cell proliferation leads to restricted blood flow. In this review we describe the intricate cellular composition of arteries, demonstrating how a variety of distinct cell types in the vascular walls regulate the function of arteries. We provide an overview of the developmental origin of arteries and perivascular cells and focus on cellular dynamics in arterial repair. We summarize the current knowledge of the molecular signaling pathways that regulate vascular smooth muscle differentiation in the embryo and in arterial injury response. Our review aims to highlight the similarities as well as differences between cellular and molecular mechanisms that control arterial development and repair.
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Affiliation(s)
- Urmas Roostalu
- Manchester Academic Health Science Centre, Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, School of Biological Sciences, University of Manchester, UK.
| | - Jason Kf Wong
- Manchester Academic Health Science Centre, Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, School of Biological Sciences, University of Manchester, UK; Department of Plastic Surgery, Manchester University NHS Foundation Trust, Wythenshawe Hospital, Manchester, UK.
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Roostalu U, Aldeiri B, Albertini A, Humphreys N, Simonsen-Jackson M, Wong JKF, Cossu G. Distinct Cellular Mechanisms Underlie Smooth Muscle Turnover in Vascular Development and Repair. Circ Res 2017; 122:267-281. [PMID: 29167274 PMCID: PMC5771686 DOI: 10.1161/circresaha.117.312111] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 11/20/2017] [Accepted: 11/21/2017] [Indexed: 12/25/2022]
Abstract
Supplemental Digital Content is available in the text. Rationale: Vascular smooth muscle turnover has important implications for blood vessel repair and for the development of cardiovascular diseases, yet lack of specific transgenic animal models has prevented it’s in vivo analysis. Objective: The objective of this study was to characterize the dynamics and mechanisms of vascular smooth muscle turnover from the earliest stages of embryonic development to arterial repair in the adult. Methods and Results: We show that CD146 is transiently expressed in vascular smooth muscle development. By using CRISPR-Cas9 genome editing and in vitro smooth muscle differentiation assay, we demonstrate that CD146 regulates the balance between proliferation and differentiation. We developed a triple-transgenic mouse model to map the fate of NG2+CD146+ immature smooth muscle cells. A series of pulse-chase experiments revealed that the origin of aortic vascular smooth muscle cells can be traced back to progenitor cells that reside in the wall of the dorsal aorta of the embryo at E10.5. A distinct population of CD146+ smooth muscle progenitor cells emerges during embryonic development and is maintained postnatally at arterial branch sites. To characterize the contribution of different cell types to arterial repair, we used 2 injury models. In limited wire-induced injury response, existing smooth muscle cells are the primary contributors to neointima formation. In contrast, microanastomosis leads to early smooth muscle death and subsequent colonization of the vascular wall by proliferative adventitial cells that contribute to the repair. Conclusions: Extensive proliferation of immature smooth muscle cells in the primitive embryonic dorsal aorta establishes the long-lived lineages of smooth muscle cells that make up the wall of the adult aorta. A discrete population of smooth muscle cells forms in the embryo and is postnatally sustained at arterial branch sites. In response to arterial injuries, existing smooth muscle cells give rise to neointima, but on extensive damage, they are replaced by adventitial cells.
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Affiliation(s)
- Urmas Roostalu
- From the Manchester Academic Health Science Centre, Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, (U.R., B.A., A.A., J.K.F.W., G.C.) and Transgenic Core Research Facility, Faculty of Biology, Medicine and Health (N.H., M.S.-J.), University of Manchester, United Kingdom; and Plastic Surgery Department, Wythenshawe Hospital, Manchester University NHS Foundation Trust, United Kingdom (J.K.F.W.).
| | - Bashar Aldeiri
- From the Manchester Academic Health Science Centre, Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, (U.R., B.A., A.A., J.K.F.W., G.C.) and Transgenic Core Research Facility, Faculty of Biology, Medicine and Health (N.H., M.S.-J.), University of Manchester, United Kingdom; and Plastic Surgery Department, Wythenshawe Hospital, Manchester University NHS Foundation Trust, United Kingdom (J.K.F.W.)
| | - Alessandra Albertini
- From the Manchester Academic Health Science Centre, Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, (U.R., B.A., A.A., J.K.F.W., G.C.) and Transgenic Core Research Facility, Faculty of Biology, Medicine and Health (N.H., M.S.-J.), University of Manchester, United Kingdom; and Plastic Surgery Department, Wythenshawe Hospital, Manchester University NHS Foundation Trust, United Kingdom (J.K.F.W.)
| | - Neil Humphreys
- From the Manchester Academic Health Science Centre, Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, (U.R., B.A., A.A., J.K.F.W., G.C.) and Transgenic Core Research Facility, Faculty of Biology, Medicine and Health (N.H., M.S.-J.), University of Manchester, United Kingdom; and Plastic Surgery Department, Wythenshawe Hospital, Manchester University NHS Foundation Trust, United Kingdom (J.K.F.W.)
| | - Maj Simonsen-Jackson
- From the Manchester Academic Health Science Centre, Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, (U.R., B.A., A.A., J.K.F.W., G.C.) and Transgenic Core Research Facility, Faculty of Biology, Medicine and Health (N.H., M.S.-J.), University of Manchester, United Kingdom; and Plastic Surgery Department, Wythenshawe Hospital, Manchester University NHS Foundation Trust, United Kingdom (J.K.F.W.)
| | - Jason K F Wong
- From the Manchester Academic Health Science Centre, Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, (U.R., B.A., A.A., J.K.F.W., G.C.) and Transgenic Core Research Facility, Faculty of Biology, Medicine and Health (N.H., M.S.-J.), University of Manchester, United Kingdom; and Plastic Surgery Department, Wythenshawe Hospital, Manchester University NHS Foundation Trust, United Kingdom (J.K.F.W.)
| | - Giulio Cossu
- From the Manchester Academic Health Science Centre, Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, (U.R., B.A., A.A., J.K.F.W., G.C.) and Transgenic Core Research Facility, Faculty of Biology, Medicine and Health (N.H., M.S.-J.), University of Manchester, United Kingdom; and Plastic Surgery Department, Wythenshawe Hospital, Manchester University NHS Foundation Trust, United Kingdom (J.K.F.W.)
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