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Chang F, Yan L, Zha Y, Hong X, Zhu K, Fei Y, Si T, Ding Y, Chen A, Zhang X, Chen Z, Li H, Jin J. Development of a Wound Epithelialization Healing Model: Reducing the Impact of Contraction Healing on the Wound Surface. J Burn Care Res 2024; 45:1016-1025. [PMID: 38616525 DOI: 10.1093/jbcr/irae065] [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: 11/22/2023] [Indexed: 04/16/2024]
Abstract
Animal experiments are important in trauma-related studies because they simulate in vivo effects. Rodents are a good choice for preparing trauma models; however, contractile healing in rodents results in a healing pattern that differs considerably from that in humans. Therefore, this study developed a new rodent model that avoids contractile healing of the skin around the wound using an anticontraction ring, and the skin in the wound's center remains intact and acts as a source for epithelialized diffusion healing. Cell proliferation, migration, revascularization, and collagen secretion did not differ between the novel and conventional full-skin defect trauma models. However, the healing rate at various stages significantly differed between the 2 groups owing to differences in the healing patterns. And without effective treatment, the experimental group cannot heal. The stabilities of the novel and conventional methods were good regardless of operator or batch. In summary, this new animal trauma model provides a stable experimental environment similar to that in humans, which may promote trauma-related research.
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Affiliation(s)
- Fei Chang
- Department of Burns, Zhangjiagang Hospital affiliated to Soochow University, Zhangjiagang, Jiangsu Province 215600, China
- Department of Burns, The First People's Hospital of Zhangjiagang City, Zhangjiagang, Jiangsu Province 215600, China
| | - Lei Yan
- Department of Burns, The 72nd Group Military Hospital of PLA, Huzhou, Zhejiang Province 313100, China
| | - Yuanyuan Zha
- Department of Burns, The First Affiliated Hospital of Second Military Medical University, Shanghai 200433, China
| | - Xudong Hong
- Department of Burns and Plastic, 903rd Hospital of PLA, Hangzhou, Zhejiang Province 310000, China
| | - Kaisi Zhu
- Department of Burns, The First Affiliated Hospital of Second Military Medical University, Shanghai 200433, China
| | - Yanghonghong Fei
- Department of Burns and Plastic, 903rd Hospital of PLA, Hangzhou, Zhejiang Province 310000, China
| | - Tingting Si
- Department of Burns and Plastic, 903rd Hospital of PLA, Hangzhou, Zhejiang Province 310000, China
| | - Yinjia Ding
- Department of Burns and Plastic, 903rd Hospital of PLA, Hangzhou, Zhejiang Province 310000, China
| | - Aifen Chen
- Department of Burns and Plastic, 903rd Hospital of PLA, Hangzhou, Zhejiang Province 310000, China
| | - Xudong Zhang
- Department of Burns and Plastic, 903rd Hospital of PLA, Hangzhou, Zhejiang Province 310000, China
| | - Zhengli Chen
- Department of Burns, The First Affiliated Hospital of Second Military Medical University, Shanghai 200433, China
| | - Huatao Li
- Department of Burns, The 72nd Group Military Hospital of PLA, Huzhou, Zhejiang Province 313100, China
| | - Jian Jin
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, China
- Shanghai Depeac Biotechnology Co., Ltd, Shanghai 200444, China
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Jiang Z, Wu J, Qiu Y, Shen G. Perfusion Analysis Using High-Definition Indocyanine Green Angiography in Burn Comb Model. J Burn Care Res 2024; 45:373-383. [PMID: 37830308 DOI: 10.1093/jbcr/irad156] [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: 07/04/2023] [Indexed: 10/14/2023]
Abstract
Indocyanine green angiography (ICGA) has been widely employed for quantitative evaluation of the rat comb burn model, but the imaging equipment, imaging protocol, and fluorescence data interpretation of ICGA remain unsatisfactory. This study aims to provide better solutions for the application of ICGA in perfusion analysis. The rat comb burn model was established under a series of different comb contact durations, including 10, 20, 25, 30, 35, and 40 s. Indocyanine green angiography was used to analyze wound perfusion. In total, 16 rats were divided into ibuprofen and control groups for the burn model, and their perfusion was compared. A total of 16 identical models were divided into standard- and high-dose indocyanine green (ICG) groups, and ICGA was conducted to investigate the dynamic change in wound fluorescence. Escharectomy was performed under real-time fluorescence mapping and navigation. The results showed that a comb contact duration of 30 s was optimum for the burn model. Indocyanine green angiography could accurately evaluate the histologically determined depth of thermal injury and wound perfusion in the rat comb model. Digital subtraction of residual fluorescence was necessary for multiple comparisons of perfusion. Dynamic changes in fluorescence and necrotic tissues were observed more clearly by high-dose (0.5 mg/kg) ICG in angiography. In conclusion, perfusion analysis by ICGA can be used to assess the histologically determined depth of thermal injury and the impact of a specific treatment on wound perfusion. Indocyanine green angiography can help to identify necrotic tissue. The above findings and related imaging protocols lay the foundation for future research.
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Affiliation(s)
- Zhaolong Jiang
- Department of Burn and Plastic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
- Department of Burn and Plastic Surgery, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Junqiang Wu
- Department of Breast Surgery, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Yunjie Qiu
- Department of Medical Statistics, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Guoliang Shen
- Department of Burn and Plastic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
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Zheng-Li C, Yu P, Guo-Sheng W, Xu-Dong H, Hao F, Xu-Dong Z, Guang-Yi W, Zhu SH, Jin J. Characterization of bacterial community structure dynamics in a rat burn wound model using 16S rRNA gene sequencing. J Burn Care Res 2022; 43:1086-1094. [PMID: 35021219 DOI: 10.1093/jbcr/irab244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Burns destroy the skin barrier and alter the resident bacterial community, thereby facilitating bacterial infection. To treat a wound infection, it is necessary to understand the changes in the wound bacterial community structure. However, traditional bacterial cultures allow the identification of only readily growing or purposely cultured bacterial species and lack the capacity to detect changes in the bacterial community. In this study, 16S rRNA gene sequencing was used to detect alterations in the bacterial community structure in deep partial-thickness burn wounds on the back of Sprague-Dawley rats. These results were then compared with those obtained from the bacterial culture. Bacterial samples were collected prior to wounding and 1, 7, 14, and 21 days after wounding. The 16S rRNA gene sequence analysis showed that the number of resident bacterial species decreased after the burn. Both resident bacterial richness and diversity, which were significantly reduced after the burn, recovered following wound healing. The dominant resident strains also changed, but the inhibition of bacterial community structure was in a non-volatile equilibrium state, even in the early stage after healing. Furthermore, the correlation between wound and environmental bacteria increased with the occurrence of burns. Hence, the 16S rRNA gene sequence analysis reflected the bacterial condition of the wounds better than the bacterial culture. 16S rRNA sequencing in the Sprague-Dawley rat burn model can provide more information for the prevention and treatment of burn infections in clinical settings and promote further development in this field.
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Affiliation(s)
- Chen Zheng-Li
- Department of Burn Surgery, Changhai Hospital, The Second Military Medical University, 168 Changhai Road, Yangpu District, Shanghai, China
| | - Peng Yu
- Department of Burn Surgery, Changhai Hospital, The Second Military Medical University, 168 Changhai Road, Yangpu District, Shanghai, China
| | - Wu Guo-Sheng
- Department of Burn Surgery, Changhai Hospital, The Second Military Medical University, 168 Changhai Road, Yangpu District, Shanghai, China
| | - Hong Xu-Dong
- Department of Burn & Plastic Surgery, 903rd Hospital of PLA (The Original 117th Hospital of People's Liberation Army), 14 Lingyin Road, Xihu District, Hangzhou, China
| | - Fan Hao
- Department of Burn & Plastic Surgery, 903rd Hospital of PLA (The Original 117th Hospital of People's Liberation Army), 14 Lingyin Road, Xihu District, Hangzhou, China
| | - Zhang Xu-Dong
- Department of Burn & Plastic Surgery, 903rd Hospital of PLA (The Original 117th Hospital of People's Liberation Army), 14 Lingyin Road, Xihu District, Hangzhou, China
| | - Wang Guang-Yi
- Department of Burn Surgery, Changhai Hospital, The Second Military Medical University, 168 Changhai Road, Yangpu District, Shanghai, China
| | - Shi-Hui Zhu
- Department of Burn Surgery, Changhai Hospital, The Second Military Medical University, 168 Changhai Road, Yangpu District, Shanghai, China
| | - Jian Jin
- Department of Burn & Plastic Surgery, 903rd Hospital of PLA (The Original 117th Hospital of People's Liberation Army), 14 Lingyin Road, Xihu District, Hangzhou, China
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Wang X, Gao Y, Sun X. Effect of Taspine hydrochloride on the repair of rat skin wounds by regulating keratinocyte growth factor signal. Bioengineered 2021; 13:789-799. [PMID: 34898359 PMCID: PMC8805989 DOI: 10.1080/21655979.2021.2012920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
To explore the regulation of keratinocyte growth factor (KGF) in the process of repairing rat skin wounds by taspine hydrochloride (TA/HCl), 45 male Sprague-Dawley (SD) rats were purchased and divided into an experimental group, a dimethyl sulfoxide (DMSO) control group, and a basic fibroblast growth factor (bFGF) control group, each with 15 only. A back trauma model was innovatively adopted to prevent rats from biting and contaminating. The wound healing time and healing rate of the rat, and the Hydroxyproline (Hyp) and KGF expressions were observed. Morphological changes of wound tissue and the number of capillaries were observed after hematoxylin-eosin (HE) staining. The results showed that wound healing rate of experimental group and bFGF group was significantly higher than that of DMSO group (P < 0.05) after 2–15 days, and wound healing time of experimental group was 18 days, which was significantly lower than that of the DMSO group (P < 0.05). Expression levels of Hyp and KGF in the granulation tissue of rats in the experimental group were much higher than those in the DMSO control group after trauma (P < 0.05). In early stage of wound tissue repair, the number of new capillaries formed in experimental group was significantly higher than that in DMSO control group (P < 0.05). In summary, this study innovatively focused on KGF. The mechanism of TA/HCL promoting rat skin wound healing was closely related to KGF.
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Affiliation(s)
- Xiumei Wang
- Department of Dermatology, Liaocheng People's Hospital, Liaocheng, China
| | - Yang Gao
- Department of Plastic & Cosmetic Surgery, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xiaochen Sun
- Department of Dermatology, People's Hospital of Lixia District of Jinan, Jinan, China
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Morarasu S, Morarasu BC, Ghețu N, Dimofte MG, Iliescu R, Pieptu D. Experimental models for controlled burn injuries in rats: a systematic analysis of original methods and burn devices. J Burn Care Res 2021; 43:1055-1065. [PMID: 34888684 DOI: 10.1093/jbcr/irab234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
AIM Despite a wide variety of models found in literature, choosing the right one can be difficult as many of them are lacking precise methodology. This study aims to analyze and compare original burn models in terms of burn device and technique, parameters, and wound depth assessment. METHODS A systematic search was performed according to PRISMA guidelines on studies describing original experimental burn models in rats. The adapted PICO formula and ARRIVE checklist were followed for inclusion and assessment of quality of studies. Characteristics of animals, burn technique, burn parameters and method of histological confirmation of burn depth were recorded. RESULTS Twenty-seven studies were included in the final analysis. Most studies used direct contact with skin for burn infliction (n=20). The rat's dorsum was the most common site (n=18). Ten studies used manually controlled burn devices, while ten designed automatic burn devices with control over temperature (n=10), exposure time (n=5), and pressure (n=5). Most studies (n=7) used a single biopsy taken from the center of the wound to confirm burn depth immediately after burn infliction. CONCLUSION From the wide variety of burn models in current literature, our study provides an overview of the most relevant experimental burn models in rats aiding researchers to understand what needs to be addressed when designing their burn protocol. Models cannot be compared as burn parameters variate significantly. Assessment of burn depth should be done in a standardized, sequential fashion in future burn studies to increase reproducibility.
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Affiliation(s)
- Stefan Morarasu
- Center of Simulation and Training in Surgery (CSTC), Grigore T Popa University of Medicine and Pharmacy, Iasi, Romania.,2nd Department of Surgical Oncology, Regional Oncology Institute, Grigore T Popa University of Medicine and Pharmacy, Iasi, Romania
| | - Bianca-Codrina Morarasu
- Center of Simulation and Training in Surgery (CSTC), Grigore T Popa University of Medicine and Pharmacy, Iasi, Romania
| | - Nicolae Ghețu
- Center of Simulation and Training in Surgery (CSTC), Grigore T Popa University of Medicine and Pharmacy, Iasi, Romania.,Department of Plastic and Reconstructive Surgery, Grigore T Popa University of Medicine and Pharmacy, Iasi, Romania
| | - Mihail-Gabriel Dimofte
- 2nd Department of Surgical Oncology, Regional Oncology Institute, Grigore T Popa University of Medicine and Pharmacy, Iasi, Romania
| | - Radu Iliescu
- Department of Pharmacology, Grigore T Popa University of Medicine and Pharmacy, Iasi, Romania
| | - Dragos Pieptu
- Center of Simulation and Training in Surgery (CSTC), Grigore T Popa University of Medicine and Pharmacy, Iasi, Romania.,Department of Plastic and Reconstructive Surgery, Grigore T Popa University of Medicine and Pharmacy, Iasi, Romania
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Luo Y, Wang Y, Ma Y, Wang P, Zhong J, Chu Y. Augmented Renal Clearance: What Have We Known and What Will We Do? Front Pharmacol 2021; 12:723731. [PMID: 34795579 PMCID: PMC8593401 DOI: 10.3389/fphar.2021.723731] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 10/12/2021] [Indexed: 01/03/2023] Open
Abstract
Augmented renal clearance (ARC) is a phenomenon of increased renal function in patients with risk factors. Sub-therapeutic drug concentrations and antibacterial exposure in ARC patients are the main reasons for clinical treatment failure. Decades of increased research have focused on these phenomena, but there are still some existing disputes and unresolved issues. This article reviews information on some important aspects of what we have known and provides suggestion on what we will do regarding ARC. In this article, we review the current research progress and its limitations, including clinical identification, special patients, risk factors, metabolism, animal models and clinical treatments, and provide some promising directions for further research in this area.
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Affiliation(s)
- Yifan Luo
- Department of Pharmacy, The First Hospital of China Medical University, Shenyang, China.,School of Pharmacy, China Medical University, Shenyang, China
| | - Yidan Wang
- Department of Pharmacy, The First Hospital of China Medical University, Shenyang, China.,School of Pharmacy, China Medical University, Shenyang, China
| | - Yue Ma
- Department of Pharmacy, The First Hospital of China Medical University, Shenyang, China.,School of Pharmacy, China Medical University, Shenyang, China
| | - Puxiu Wang
- Department of Pharmacy, The First Hospital of China Medical University, Shenyang, China.,School of Pharmacy, China Medical University, Shenyang, China
| | - Jian Zhong
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
| | - Yang Chu
- Department of Pharmacy, The First Hospital of China Medical University, Shenyang, China.,School of Pharmacy, China Medical University, Shenyang, China
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