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Zhang MM, Mao JQ, Shen LX, Shi AH, Lyu X, Ma J, Lyu Y, Yan XP. Optimization of tracheoesophageal fistula model established with T-shaped magnet system based on magnetic compression technique. World J Gastroenterol 2024; 30:2272-2280. [PMID: 38690021 PMCID: PMC11056911 DOI: 10.3748/wjg.v30.i16.2272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 03/13/2024] [Accepted: 04/08/2024] [Indexed: 04/26/2024] Open
Abstract
BACKGROUND The magnetic compression technique has been used to establish an animal model of tracheoesophageal fistula (TEF), but the commonly shaped magnets present limitations of poor homogeneity of TEF and poor model control. We designed a T-shaped magnet system to overcome these problems and verified its effectiveness via animal experiments. AIM To investigate the effectiveness of a T-shaped magnet system for establishing a TEF model in beagle dogs. METHODS Twelve beagles were randomly assigned to groups in which magnets of the T-shaped scheme (study group, n = 6) or normal magnets (control group, n = 6) were implanted into the trachea and esophagus separately under gastroscopy. Operation time, operation success rate, and accidental injury were recorded. After operation, the presence and timing of cough and the time of magnet shedding were observed. Dogs in the control group were euthanized after X-ray and gastroscopy to confirm establishment of TEFs after coughing, and gross specimens of TEFs were obtained. Dogs in the study group were euthanized after X-ray and gastroscopy 2 wk after surgery, and gross specimens were obtained. Fistula size was measured in all animals, and then harvested fistula specimens were examined by hematoxylin and eosin (HE) and Masson trichrome staining. RESULTS The operation success rate was 100% for both groups. Operation time did not differ between the study group (5.25 min ± 1.29 min) and the control group (4.75 min ± 1.70 min; P = 0.331). No bleeding, perforation, or unplanned magnet attraction occurred in any animal during the operation. In the early postoperative period, all dogs ate freely and were generally in good condition. Dogs in the control group had severe cough after drinking water at 6-9 d after surgery. X-ray indicated that the magnets had entered the stomach, and gastroscopy showed TEF formation. Gross specimens of TEFs from the control group showed the formation of fistulas with a diameter of 4.94 mm ± 1.29 mm (range, 3.52-6.56 mm). HE and Masson trichrome staining showed scar tissue formation and hierarchical structural disorder at the fistulas. Dogs in the study group did not exhibit obvious coughing after surgery. X-ray examination 2 wk after surgery indicated fixed magnet positioning, and gastroscopy showed no change in magnet positioning. The magnets were removed using a snare under endoscopy, and TEF was observed. Gross specimens showed well-formed fistulas with a diameter of 6.11 mm ± 0.16 mm (range, 5.92-6.36 mm), which exceeded that in the control group (P < 0.001). Scar formation was observed on the internal surface of fistulas by HE and Masson trichrome staining, and the structure was more regular than that in the control group. CONCLUSION Use of the modified T-shaped magnet scheme is safe and feasible for establishing TEF and can achieve a more stable and uniform fistula size compared with ordinary magnets. Most importantly, this model offers better controllability, which improves the flexibility of follow-up studies.
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Affiliation(s)
- Miao-Miao Zhang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, Shaanxi Province, China
- Shaanxi Provincial Key Laboratory of Magnetic Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, Shaanxi Province, China
| | - Jian-Qi Mao
- Zonglian College, Xi’an Jiaotong University, Xi’an 710061, Shaanxi Province, China
| | - Lin-Xin Shen
- Zonglian College, Xi’an Jiaotong University, Xi’an 710061, Shaanxi Province, China
| | - Ai-Hua Shi
- National Local Joint Engineering Research Center for Precision Surgery & Regenerative Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, Shaanxi Province, China
| | - Xin Lyu
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710004, Shaanxi Province, China
| | - Jia Ma
- Department of Surgical Oncology, Shaanxi Provincial People’s Hospital, Xi’an 710068, Shaanxi Province, China
| | - Yi Lyu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, Shaanxi Province, China
- Shaanxi Provincial Key Laboratory of Magnetic Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, Shaanxi Province, China
| | - Xiao-Peng Yan
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, Shaanxi Province, China
- Shaanxi Provincial Key Laboratory of Magnetic Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710061, Shaanxi Province, China
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Lyu FJ, Peng S, Li J. Editorial: Progress on musculoskeletal disorders and stem cell therapies. Front Bioeng Biotechnol 2023; 11:1153525. [PMID: 36911189 PMCID: PMC9996748 DOI: 10.3389/fbioe.2023.1153525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Accepted: 02/10/2023] [Indexed: 02/25/2023] Open
Affiliation(s)
- Feng-Juan Lyu
- Joint Center for Regenerative Medicine Research of South China University of Technology and The University of Western Australia, School of Medicine, South China University of Technology, Guangzhou, China
| | - Songlin Peng
- Shenzhen Key Laboratory of Musculoskeletal Tissue Reconstruction and Function Restoration, Department of Spine Surgery and Institute for Orthopaedic Research, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), Shenzhen, China
| | - Jun Li
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, United States
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Chen W, He Z, Li S, Wu Z, Tan J, Yang W, Li G, Pan X, Liu Y, Lyu FJ, Li W. The Effect of Tissue Stromal Vascular Fraction as Compared to Cellular Stromal Vascular Fraction to Treat Anal Sphincter Incontinence. BIOENGINEERING (BASEL, SWITZERLAND) 2022; 10:bioengineering10010032. [PMID: 36671604 PMCID: PMC9854502 DOI: 10.3390/bioengineering10010032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/30/2022] [Accepted: 12/12/2022] [Indexed: 12/28/2022]
Abstract
BACKGROUND The long-term prognosis of current treatments for anal sphincter incontinence (ASI) is poor. Here, we explored the efficacy of tissue adipose stromal vascular fraction SVF (tSVF) on ASI and compared it to that of cellular SVF (cSVF). We then investigated possible mechanisms. METHODS Rat cSVF and tSVF were isolated and labeled with DIL. One day after modeling, three groups received phosphate-buffered saline (PBS), cSVF, tSVF, respectively. The control group received nil modeling nor any treatments. The effect was assessed by function test for anal pressure and electromyography, and staining for fiber content, proliferation and differentiation at day 5 and day 10. RESULTS cSVF injection resulted in faster healing than tSVF. The cSVF group showed significant improvement on anal pressure on day 10. For the electromyography test, cSVF showed significant improvement for the frequencies on day 10, and for the peak values on both time points, while tSVF showed significant improvement for the peak values on day 10. The two SVF both alleviated fibrosis. Immunofluorescence tracing identified differentiation of some injected cells towards myosatellite cells and smooth muscle cells in both SVF groups. For all the tests, the tSVF group tends to have similar or lower effects than the cSVF group with no significant difference. CONCLUSION cSVF and tSVF are both safe and effective in treating ASI, while the effect of cSVF is slighter higher than tSVF.
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Affiliation(s)
- Wenbin Chen
- Department of Colorectal and Anal Surgery, The Second Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou 510641, China
| | - Zijian He
- Department of Colorectal and Anal Surgery, The Second Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou 510641, China
| | - Shuyu Li
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510641, China
| | - Zixin Wu
- Department of Colorectal and Anal Surgery, The Second Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou 510641, China
| | - Jin Tan
- The Sixth Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou 510641, China
| | - Weifeng Yang
- Department of Colorectal and Anal Surgery, The Second Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou 510641, China
| | - Guanwei Li
- Department of Colorectal and Anal Surgery, The Second Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou 510641, China
| | - Xiaoling Pan
- The Sixth Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou 510641, China
| | - Yuying Liu
- The Sixth Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou 510641, China
| | - Feng-Juan Lyu
- The Sixth Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou 510641, China
- Correspondence: (F.-J.L.); (W.L.)
| | - Wanglin Li
- Department of Colorectal and Anal Surgery, The Second Affiliated Hospital, School of Medicine, South China University of Technology, Guangzhou 510641, China
- Correspondence: (F.-J.L.); (W.L.)
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Wang F, Li Z, Lyu FJ, Gao J, Lin J, Liu J, Chen X, Li Z, Shan J, Wu J. Correction: The therapeutic effect of stem cells from human exfoliated deciduous teeth on a rat model of tracheal fistula. Stem Cell Res Ther 2022; 13:506. [PMID: 36266664 PMCID: PMC9585749 DOI: 10.1186/s13287-022-03195-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Fang Wang
- School of Medicine, South China University of Technology, Guangzhou, 510006, China.,Second Department of Elderly Respiratory, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Geriatrics Institute, Guangzhou, 510080, China
| | - Zhangwen Li
- School of Medicine, South China University of Technology, Guangzhou, 510006, China.,Second Department of Elderly Respiratory, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Geriatrics Institute, Guangzhou, 510080, China
| | - Feng-Juan Lyu
- School of Medicine, South China University of Technology, Guangzhou, 510006, China
| | - Jie Gao
- Second Department of Elderly Respiratory, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Geriatrics Institute, Guangzhou, 510080, China.,The Second School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Jinle Lin
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, China.,Department of Emergency Medicine, People's Hospital of Shenzhen Baoan District, The Second Affiliated Hospital of Shenzhen University, 518101, Shenzhen, China
| | - Jianling Liu
- School of Medicine, South China University of Technology, Guangzhou, 510006, China.,Second Department of Elderly Respiratory, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Geriatrics Institute, Guangzhou, 510080, China
| | - Xiaowen Chen
- School of Medicine, South China University of Technology, Guangzhou, 510006, China.,Second Department of Elderly Respiratory, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Geriatrics Institute, Guangzhou, 510080, China
| | - Zhongpeng Li
- Second Department of Elderly Respiratory, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Geriatrics Institute, Guangzhou, 510080, China.,The Second School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Jiajie Shan
- School of Medicine, South China University of Technology, Guangzhou, 510006, China
| | - Jian Wu
- School of Medicine, South China University of Technology, Guangzhou, 510006, China. .,Second Department of Elderly Respiratory, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangdong Provincial Geriatrics Institute, Guangzhou, 510080, China.
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