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Lin YC, Chen QY, Xiao J, Shen LC, Li XT, Yang YZ, Guo PF, Lin MJ, Lin DC. Mouse Abdominal Aortic Aneurysm Model Induced by Periarterial Incubation of Papain. J Transl Med 2023; 103:100035. [PMID: 36925203 DOI: 10.1016/j.labinv.2022.100035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 11/15/2022] [Accepted: 11/15/2022] [Indexed: 01/11/2023] Open
Abstract
For decades, numerous experimental animal models have been developed to examine the pathophysiologic mechanisms and potential treatments for abdominal aortic aneurysms (AAAs) in diverse species with varying chemical or surgical approaches. This study aimed to create an AAA mouse model by the periarterial incubation with papain, which can mimic human AAA with advantages such as simplicity, convenience, and high efficiency. Eighty C57BL/6J male mice were randomly assigned to 1 of the 4 groups: papain (1.0 or 2.0 mg), porcine pancreatic elastase, and phosphate-buffered solution. The aortic segment was wrapped for 20 minutes, and the diameter was measured using ultrasound preoperatively and postoperative days 7 and 14. Then, the mice were killed for histomorphometric and immunohistochemical analyses. According to ultrasound measurements and histomorphometric analyses, on postoperative day 7, 65% of mice in the 1.0-mg papain group and 60% of mice in the 2.0-mg papain group developed AAA. In both papain groups, 100% of mice developed AAA, and 65% of mice in the porcine pancreatic elastase group developed AAA on postoperative day 14. Furthermore, hematoxylin/eosin, elastin van Gieson, and Masson staining of tissues from the papain group revealed thickened media and intimal hyperplasia, collagen sediments, and elastin destruction, indicating that AAA histochemical alteration was similar to that of humans. In addition, the immunohistochemical analysis was conducted to detect infiltrated inflammatory cells, such as macrophages and leukocytes, in the aortic wall and hyperplasic adventitia. The expression of matrix metalloproteinase 2 and 9 was significantly upregulated in papain and human AAA tissues. Periarterial incubation with 1.0 mg of papain for 20 minutes can successfully create an experimental AAA model in mice for 14 days, which can be used to explore the mechanism and treatment of human AAA.
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Affiliation(s)
- Yi-Chen Lin
- Department of Vascular Surgery, First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian Province, People's Republic of China; Key Laboratory of Fujian Province Universities on Ion Channel and Signal Transduction in Cardiovascular Diseases, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian Province, People's Republic of China; The First School of Clinical Medicine, Fujian Medical University, Fuzhou, Fujian Province, People's Republic of China
| | - Qin-Ye Chen
- Key Laboratory of Fujian Province Universities on Ion Channel and Signal Transduction in Cardiovascular Diseases, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian Province, People's Republic of China
| | - Jie Xiao
- Key Laboratory of Fujian Province Universities on Ion Channel and Signal Transduction in Cardiovascular Diseases, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian Province, People's Republic of China
| | - Li-Chuan Shen
- Department of Vascular Surgery, First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian Province, People's Republic of China; The First School of Clinical Medicine, Fujian Medical University, Fuzhou, Fujian Province, People's Republic of China
| | - Xian-Tao Li
- Department of Vascular Surgery, First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian Province, People's Republic of China; The First School of Clinical Medicine, Fujian Medical University, Fuzhou, Fujian Province, People's Republic of China
| | - Yu-Ze Yang
- The First School of Clinical Medicine, Fujian Medical University, Fuzhou, Fujian Province, People's Republic of China
| | - Ping-Fan Guo
- Department of Vascular Surgery, First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian Province, People's Republic of China; The First School of Clinical Medicine, Fujian Medical University, Fuzhou, Fujian Province, People's Republic of China
| | - Mo-Jun Lin
- Key Laboratory of Fujian Province Universities on Ion Channel and Signal Transduction in Cardiovascular Diseases, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian Province, People's Republic of China.
| | - Da-Cen Lin
- Key Laboratory of Fujian Province Universities on Ion Channel and Signal Transduction in Cardiovascular Diseases, Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian Province, People's Republic of China; Department of Epidemiology and Health Statistics, School of Public Health, Fujian Medical University, Fuzhou, Fujian Province, People's Republic of China.
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