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Piao C, Zhang WM, Deng J, Zhou M, Liu TT, Zheng S, Jia LX, Song WC, Liu Y, Du J. Activation of the alternative complement pathway modulates inflammation in thoracic aortic aneurysm/dissection. Am J Physiol Cell Physiol 2024; 326:C647-C658. [PMID: 38189133 DOI: 10.1152/ajpcell.00210.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 12/07/2023] [Accepted: 12/24/2023] [Indexed: 01/09/2024]
Abstract
Thoracic aortic aneurysm/dissection (TAAD) is a lethal vascular disease, and several pathological factors participate in aortic medial degeneration. We previously discovered that the complement C3a-C3aR axis in smooth muscle cells promotes the development of thoracic aortic dissection (TAD) through regulation of matrix metalloproteinase 2. However, discerning the specific complement pathway that is activated and elucidating how inflammation of the aortic wall is initiated remain unknown. We ascertained that the plasma levels of C3a and C5a were significantly elevated in patients with TAD and that the levels of C3a, C4a, and C5a were higher in acute TAD than in chronic TAD. We also confirmed the activation of the complement in a TAD mouse model. Subsequently, knocking out Cfb (Cfb) or C4 in mice with TAD revealed that the alternative pathway and Cfb played a significant role in the TAD process. Activation of the alternative pathway led to generation of the anaphylatoxins C3a and C5a, and knocking out their receptors reduced the recruitment of inflammatory cells to the aortic wall. Moreover, we used serum from wild-type mice or recombinant mice Cfb as an exogenous source of Cfb to treat Cfb KO mice and observed that it exacerbated the onset and rupture of TAD. Finally, we knocked out Cfb in the FBN1C1041G/+ Marfan-syndrome mice and showed that the occurrence of TAA was reduced. In summary, the alternative complement pathway promoted the development of TAAD by recruiting infiltrating inflammatory cells. Targeting the alternative pathway may thus constitute a strategy for preventing the development of TAAD.NEW & NOTEWORTHY The alternative complement pathway promoted the development of TAAD by recruiting infiltrating inflammatory cells. Targeting the alternative pathway may thus constitute a strategy for preventing the development of TAAD.
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Affiliation(s)
- Chunmei Piao
- Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- Beijing Collaborative Innovation Centre for Cardiovascular Disorders, Beijing, China
- The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Ministry of Education, Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing, China
| | - Wen-Mei Zhang
- Department of Respiratory, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Jing Deng
- School of Basic Medical Sciences, Yanbian University, Yanji, China
| | - Mei Zhou
- Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- Beijing Collaborative Innovation Centre for Cardiovascular Disorders, Beijing, China
- The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Ministry of Education, Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing, China
| | - Ting-Ting Liu
- Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- Beijing Collaborative Innovation Centre for Cardiovascular Disorders, Beijing, China
- The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Ministry of Education, Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing, China
| | - Shuai Zheng
- Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- Beijing Collaborative Innovation Centre for Cardiovascular Disorders, Beijing, China
- The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Ministry of Education, Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing, China
| | - Li-Xin Jia
- Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- Beijing Collaborative Innovation Centre for Cardiovascular Disorders, Beijing, China
- The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Ministry of Education, Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing, China
| | - Wen-Chao Song
- Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- Beijing Collaborative Innovation Centre for Cardiovascular Disorders, Beijing, China
- The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Ministry of Education, Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing, China
| | - Yan Liu
- Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- Beijing Collaborative Innovation Centre for Cardiovascular Disorders, Beijing, China
- The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Ministry of Education, Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing, China
| | - Jie Du
- Beijing Anzhen Hospital, Capital Medical University, Beijing, China
- Beijing Collaborative Innovation Centre for Cardiovascular Disorders, Beijing, China
- The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Ministry of Education, Beijing Institute of Heart Lung and Blood Vessel Diseases, Beijing, China
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Gudbjartsson T, Ahlsson A, Geirsson A, Gunn J, Hjortdal V, Jeppsson A, Mennander A, Zindovic I, Olsson C. Acute type A aortic dissection - a review. SCAND CARDIOVASC J 2019; 54:1-13. [PMID: 31542960 DOI: 10.1080/14017431.2019.1660401] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Acute type A aortic dissection (ATAAD) is still one of the most challenging diseases that cardiac surgeons encounter. This review is based on the current literature and includes the results from the Nordic Consortium for Acute Type-A Aortic Dissection (NORCAAD) database. It covers different aspects of ATAAD and concentrates on the outcome of surgical repair. The diagnosis is occasionally delayed, and ATAAD is usually lethal if prompt repair is not performed. The dynamic nature of the disease, the variation in presentation and clinical course, and the urgency of treatment require significant attentiveness. Many surgical techniques and perfusion strategies of varying complexity have been described, ranging from simple interposition graft to total arch replacement with frozen elephant trunk and valve-sparing root reconstruction. Although more complex techniques may provide long-term benefit in selected patients, they require significant surgical expertise and experience. Short-term survival is first priority so an expedited operation that fits in with the surgeon's level of expertise is in most cases appropriate.
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Affiliation(s)
- Tomas Gudbjartsson
- Department of Cardiothoracic Surgery, Landspitali University Hospital, Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - Anders Ahlsson
- Department of Cardiothoracic Surgery, Karolinska University Hospital, Stockholm, Sweden
| | - Arnar Geirsson
- Division of Cardiac Surgery, Yale School of Medicine, New Haven, CT, USA
| | - Jarmo Gunn
- Department of Cardiothoracic Surgery, Turku University Hospital, University of Turku, Turku, Finland
| | - Vibeke Hjortdal
- Department of Cardiothoracic Surgery, Aarhus University Hospital, Aarhus, Denmark
| | - Anders Jeppsson
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, Gothenburg University, Sweden and Department of Cardiothoracic Surgery, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Ari Mennander
- Tampere University Heart Hospital and Tampere University, Tampere, Finland
| | - Igor Zindovic
- Lund University, Skåne University Hospital, Department of Clinical Sciences, Department of Cardiothoracic Surgery, Lund, Sweden
| | - Christian Olsson
- Department of Cardiothoracic Surgery, Karolinska University Hospital, Stockholm, Sweden
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Modulation of Immune-Inflammatory Responses in Abdominal Aortic Aneurysm: Emerging Molecular Targets. J Immunol Res 2018; 2018:7213760. [PMID: 29967801 PMCID: PMC6008668 DOI: 10.1155/2018/7213760] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 03/18/2018] [Accepted: 03/31/2018] [Indexed: 12/24/2022] Open
Abstract
Abdominal aortic aneurysm (AAA), a deadly vascular disease in human, is a chronic degenerative process of the abdominal aorta. In this process, inflammatory responses and immune system work efficiently by inflammatory cell attraction, proinflammatory factor secretion and subsequently MMP upregulation. Previous studies have demonstrated various inflammatory cell types in AAA of human and animals. The majority of cells, such as macrophages, CD4+ T cells, and B cells, play an important role in the diseased aortic wall through phenotypic modulation. Furthermore, immunoglobulins also greatly affect the functions and differentiation of immune cells in AAA. Recent evidence suggests that innate immune system, especially Toll-like receptors, chemokine receptors, and complements are involved in the progression of AAAs. We discussed the innate immune system, inflammatory cells, immunoglobulins, immune-mediated mechanisms, and key cytokines in the pathogenesis of AAA and particularly emphasis on a further trend and application of these interventions. This current understanding may offer new insights into the role of inflammation and immune response in AAA.
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Knoll F, Zitt E, Intemann D, Lhotta K. Juvenile elastic arteries after 28 years of renal replacement therapy in a patient with complete complement C4 deficiency. BMC Nephrol 2012. [PMID: 23199021 PMCID: PMC3536710 DOI: 10.1186/1471-2369-13-161] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Complement activation products are present in atherosclerotic plaques. Recently, binding of complement to elastin and collagen in the aortic wall has been demonstrated, suggesting a role of complement in the development aortic stiffness and atherosclerosis. The definitive role of complement in atherosclerosis and arteriosclerosis, however, remains unclear. CASE PRESENTATION We here describe a patient with hereditary complete deficiency of complement C4 suffering from Henoch-Schoenlein purpura and on renal replacement therapy for twenty-eight years. The patient had the full range of risk factors for vascular damage such as hypertension, volume overload, hyperphosphatemia and hyperparathyroidism. Despite that, his carotid artery intima media thickness was below the normal range and his pulse wave velocity was normal. In contrast, the patient's coronary and peripheral muscular arteries were heavily calcified. CONCLUSION This case supports the hypothesis that complement plays an important role in the development of stiffness of elastic arteries. We speculate that inability to activate complement by the classical or lectin pathways protected the patient from atherosclerosis, arteriosclerosis, stiffening and calcification of the aorta and carotid arteries. Inhibition of complement activation may be a potential target for prophylactic and therapeutic interventions.
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Affiliation(s)
- Florian Knoll
- Department of Nephrology and Dialysis, Feldkirch Academic Teaching Hospital, Carinagasse 47, Feldkirch 6800, Austria.
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