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Rokop ZP, Zhang W, Ghosh N, Biswas N, Das A, Lin J, Sen CK, Kubal C. Exacerbated ischemia-reperfusion injury in fatty livers is mediated by lipid peroxidation stress and ferroptosis. Surgery 2024; 175:1539-1546. [PMID: 38508920 DOI: 10.1016/j.surg.2024.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 01/28/2024] [Accepted: 02/02/2024] [Indexed: 03/22/2024]
Abstract
BACKGROUND Ischemia-reperfusion injury is a common problem in liver surgery and transplantation. Although ischemia-reperfusion injury is known to be more pronounced in fatty livers, the underlying mechanisms for this difference remain poorly understood. We hypothesized that ferroptosis plays a significant role in fatty liver ischemia-reperfusion injury due to increased lipid peroxidation in the presence of stored iron in the fatty liver. To test this hypothesis, the ferroptosis pathway was evaluated in a murine fatty liver ischemia-reperfusion injury model. METHODS C57BL6 mice were fed with a normal diet or a high fat, high sucrose diet for 12 weeks. At 22 weeks of age, liver ischemia-reperfusion injury was induced through partial (70%) hepatic pedicle clamping for 60 minutes, followed by 24 hours of reperfusion before tissue harvest. Acyl-coenzyme A synthetase long-chain family member 4 and 4-hydroxynonenal were quantified in the liver tissues. In separate experiments, liproxstatin-1 or vehicle control was administered for 7 consecutive days before liver ischemia-reperfusion injury. RESULTS Exacerbated ischemia-reperfusion injury was observed in the livers of high fat, high sucrose diet fed mice. High fat, high sucrose diet + ischemia-reperfusion injury (HDF+IRI) livers had a significantly greater abundance of acyl-coenzyme A synthetase long-chain family member 4 and 4-hydroxynonenal compared with normal diet + ischemia-reperfusion injury (ND+IRI) livers or sham fatty livers, which indicated an increase of ferroptosis. HFD fed animals receiving liproxstatin-1 injections had a significant reduction in serum aspartate transaminase and alanine transaminase after ischemia-reperfusion injury, consistent with attenuation of ischemia-reperfusion injury in the liver. CONCLUSION Ferroptosis plays a significant role in ischemia-reperfusion injury in fatty livers. Inhibiting ferroptotic pathways in the liver may serve as a novel therapeutic strategy to protect the fatty liver in the setting of ischemia-reperfusion injury.
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Affiliation(s)
- Zachary P Rokop
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN
| | - Wenjun Zhang
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN
| | - Nandini Ghosh
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN; IU Health Comprehensive Wound Center, Indiana University School of Medicine, Indianapolis, IN; Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN
| | - Nirupam Biswas
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN; IU Health Comprehensive Wound Center, Indiana University School of Medicine, Indianapolis, IN; Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN
| | - Amitava Das
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN; IU Health Comprehensive Wound Center, Indiana University School of Medicine, Indianapolis, IN; Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN
| | - Jingmei Lin
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN
| | - Chandan K Sen
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN; IU Health Comprehensive Wound Center, Indiana University School of Medicine, Indianapolis, IN; Indiana Center for Regenerative Medicine and Engineering, Indiana University School of Medicine, Indianapolis, IN. https://twitter.com/ChandanKSen
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Constant C, Moriarty TF, Arens D, Pugliese B, Zeiter S. Peri-anesthetic hypothermia in rodents: A factor to consider for accurate and reproducible outcomes in orthopedic device-related infection studies. J Orthop Res 2023; 41:619-628. [PMID: 35716157 DOI: 10.1002/jor.25397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 05/12/2022] [Accepted: 06/15/2022] [Indexed: 02/04/2023]
Abstract
Orthopedic device-related infection (ODRI) preclinical models are widely used in translational research. Most ODRI models require induction of general anesthesia, which frequently results in hypothermia in rodents. This study aimed to evaluate the impact of peri-anesthetic hypothermia in rodents on outcomes in preclinical ODRI studies. A retrospective analysis of all rodents that underwent surgery under general anesthesia to induce an ODRI model with inoculation of Staphylococcus epidermidis between 2016 and 2020 was conducted. A one-way multivariate analysis of covariance (one-way MANCOVA) was used to determine the fixed effect of peri-anesthetic hypothermia (hypothermic defined as rectal temperature <35°C) on the combined harvested tissue and implant colony-forming unit (CFU) counts, and having controlled for the study groups including treatments received, duration of surgery and anesthesia, and study period. The results showed a significant effect of peri-anesthetic hypothermia on the post-mortem combined CFU counts from the harvested tissue and implant(s) (p = 0.01) when comparing normo- versus hypothermic rodents. Using Wilks' Λ as a criterion to determine the contribution of independent variables to the model, peri-anesthetic hypothermia was the most significant, though still a weak predictor, of increased harvested CFU counts. Altogether, the data corroborate the concept that bacterial colonization is affected by abnormal body temperature during general anesthesia at the time of bacterial inoculation in rodents, which needs to be taken into consideration to decrease infection data variability and improve experimental reproducibility.
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Tashiro M, Hosokawa Y, Amao H, Tohei A. Duration of thermal support for preventing hypothermia induced by anesthesia with medetomidine-midazolam-butorphanol in mice. J Vet Med Sci 2020; 82:1757-1762. [PMID: 33055454 PMCID: PMC7804034 DOI: 10.1292/jvms.20-0256] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Hypothermia during anesthetic events is a common adverse effect of anesthesia in laboratory animals. In particular, small rodents such as mice is susceptible
to hypothermia during anesthetic events. Therefore, the animals will need additional thermal support by external heating devices during and after anesthesia. In
general, the time of recovery from anesthesia is typically longer in case of injectable anesthesia rather than inhalant anesthesia. However, the durations of
thermal support have been almost limited to 1 hr from administration of anesthesia in general. Our study objectives are two-fold: 1) to compare the levels of
hypothermia induced by injectable anesthesia with medetomidine-midazolam-butorphanol (MMB) and inhalant anesthesia with isoflurane (ISO); 2) to find the
adequate durations of thermal support for preventing hypothermia induced by their anesthesia in mice. Adult male ICR mice were anesthetized during 40 min
without and with the thermal support for 1 (both anesthetic groups), 2, 3, and 5 hr (in MMB group). Without thermal support, the decrease of body temperature in
MMB group were more severe than that in ISO group. The durations of thermal support completely prevented hypothermia at 5 hr-support in MMB group and that at 1
hr-support in ISO group. However, the other short durations did not prevent hypothermia at 1, 2 and 3 hr-support in MMB group. These results suggest that the
mice should be received thermal support over 5 hr after injection of MMB anesthesia to prevent hypothermia.
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Affiliation(s)
- Mizuho Tashiro
- Laboratory of Experimental Animal Science, Nippon Veterinary and Life Science University, 1-7-1 Kyonan, Musashino, Tokyo 180-8602, Japan
| | - Yuki Hosokawa
- Laboratory of Experimental Animal Science, Nippon Veterinary and Life Science University, 1-7-1 Kyonan, Musashino, Tokyo 180-8602, Japan
| | - Hiromi Amao
- Laboratory of Experimental Animal Science, Nippon Veterinary and Life Science University, 1-7-1 Kyonan, Musashino, Tokyo 180-8602, Japan
| | - Atsushi Tohei
- Laboratory of Experimental Animal Science, Nippon Veterinary and Life Science University, 1-7-1 Kyonan, Musashino, Tokyo 180-8602, Japan
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Li T, Hu Z, Wang L, Lv GY. Details determining the success in establishing a mouse orthotopic liver transplantation model. World J Gastroenterol 2020; 26:3889-3898. [PMID: 32774064 PMCID: PMC7385559 DOI: 10.3748/wjg.v26.i27.3889] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 05/03/2020] [Accepted: 06/16/2020] [Indexed: 02/06/2023] Open
Abstract
Liver transplantation (LT) is currently the only effective treatment option for end-stage liver disease. The importance of animal models in transplantation is widely recognized among researchers. Because of the well-characterized mouse genome and the greater diversity and availability of both genetically modified animals and research reagents, mouse orthotopic LT (MOLT) has become an ideal model for the investigation of liver biology, tissue injury, regulation of alloimmunity and tolerance induction, and the pathogenesis of specific liver diseases. However, due to its complicated and technically demanding procedure, the model has merely been used by only a few research groups in the world for years. For a new learner, training lasting at least a couple of months or even years is required. Most of the investigators have emphasized the importance of elaborate techniques and dedicated instruments in establishing a MOLT model, but some details are often neglected. The nontechnical details are also significant, especially for researchers who have little experience in mouse microsurgery. Here, we review and summarize the crucial technical and nontechnical details in establishing the model of MOLT based on scientific articles and our experience in six aspects: animal selection, anesthesia, perioperative management, organ procurement, back-table preparation, and implantation surgery. We aim to enable research groups to shorten the learning curve and implement the mouse LT procedure with high technical success.
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Affiliation(s)
- Ting Li
- Department of Hepatobiliary and Pancreatic Surgery, The First Hospital of Jilin University, Changchun 130021, Jilin Province, China
| | - Zheng Hu
- Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, The First Hospital of Jilin University, Changchun 130061, Jilin Province, China
- National-Local Joint Engineering Laboratory of Animal Models for Human Diseases, Changchun 130061, Jilin Province, China
| | - Lei Wang
- Department of Gastrointestinal Surgery, The First Hospital of Jilin University, Changchun 130021, Jilin Province, China
| | - Guo-Yue Lv
- Department of Hepatobiliary and Pancreatic Surgery, The First Hospital of Jilin University, Changchun 130021, Jilin Province, China
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Hankenson FC, Marx JO, Gordon CJ, David JM. Effects of Rodent Thermoregulation on Animal Models in the Research Environment. Comp Med 2018; 68:425-438. [PMID: 30458902 DOI: 10.30802/aalas-cm-18-000049] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
To best promote animal wellbeing and the efficacy of biomedical models, scientific, husbandry, and veterinary professionals must consider the mechanisms, influences, and outcomes of rodent thermoregulation in contemporary research environments. Over the last 2 decades, numerous studies have shown that laboratory mice and rats prefer temperatures that are several degrees warmer than the environments in which they typically are housed within biomedical facilities. Physiologic changes to rodents that are cage-housed under standard temperatures (20 to 26 °C) are attributed to 'cold stress' and include alterations in metabolism, cardiovascular parameters, respiration, and immunologic function. This review article describes common behavioral and physiologic adaptations of laboratory mice and rats to cold stress within modern vivaria, with emphasis on environmental enrichment and effects of anesthesia and procedural support efforts. In addition, potential interventions and outcomes for rodents are presented, relative to the importance of repeating and reproducing experiments involving laboratory rodent research models of human disease.
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Affiliation(s)
- F Claire Hankenson
- Campus Animal Resources, Department of Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, East Lansing, Michigan, USA
| | - James O Marx
- University Laboratory Animal Resources, Department of Pathobiology, School of Veterinary Medicine; University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Christopher J Gordon
- Toxicity Assessment Division, Neurotoxicology Branch, United States Environmental Protection Agency, Research Triangle Park, North Carolina, USA
| | - John M David
- Comparative Medicine, Pfizer, La Jolla, California, USA
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Lee JK, Lee S, Choi YA, Jin M, Kim YY, Kang BC, Kim MJ, Dhakal H, Lee SR, Kim SU, Khang D, Kim SH. Perfluorooctane sulfonate exacerbates mast cell-mediated allergic inflammation by the release of histamine. Mol Cell Toxicol 2018. [DOI: 10.1007/s13273-018-0019-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Lee JK, Kim SH. Correlation between mast cell-mediated allergic inflammation and length of perfluorinated compounds. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2018; 81:302-313. [PMID: 29482476 DOI: 10.1080/15287394.2018.1440188] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Perfluorinated compounds (PFC) have widely been used in numerous applications including clothing, food packaging, and nonstick coating. With the widespread use of PFC, concerns regarding potential adverse health effects in humans and wildlife have increased. In spite of the known PFC-mediated immunotoxiciy, correlation with PFC and allergic inflammation still requires elucidation. The aim of this study was to examine the effect of four types of PFC (perfluoroheptanoic acid [PFHpA], perfluorononanoic acid [PFNA], perfluorodecanoic acid [PFDA], and perfluoroundecanoic acid [PFUnA]) on mast cell-mediated allergic inflammation in the presence of high-affinity immunoglobulin (Ig) E receptor (FcεRI) cross-linking. Among PFC family, long-chain PFDA and PFUnA increased release of histamine and β-hexosaminidase by up-regulation of intracellular calcium levels in IgE-stimulated mast cells. In addition, PFDA and PFUnA enhanced gene expression of pro-inflammatory cytokines, such as tumor necrosis factor (TNF)-α, interleukin (IL)-1β, IL-6, and IL-8 by activation of nuclear factor-κB in IgE-stimulated mast cells. In ovalbumin (OVA)-induced model of systemic anaphylaxis in the presence of hypothermia, PFNA, PFDA, and PFUnA exacerbated allergic symptoms accompanied by elevation in serum histamine, TNF-α, IgE, and IgG1. Our data indicate that some PFC aggravated high-affinity IgE receptor (FcεRI)-mediated mast cell degranulation and allergic symptoms. Consequently, the results demonstrated that carbon-chain length of PFC may serve as a factor in allergic inflammation.
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Affiliation(s)
- Jun-Kyoung Lee
- a Department of Pharmacology, School of Medicine , Kyungpook National University , Daegu Republic of Korea
| | - Sang-Hyun Kim
- a Department of Pharmacology, School of Medicine , Kyungpook National University , Daegu Republic of Korea
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NKT cells are important mediators of hepatic ischemia-reperfusion injury. Transpl Immunol 2017; 45:15-21. [PMID: 28797737 PMCID: PMC5694034 DOI: 10.1016/j.trim.2017.08.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 08/04/2017] [Accepted: 08/05/2017] [Indexed: 12/16/2022]
Abstract
Introduction IRI results from the interruption then reinstatement of an organ's blood supply, and this poses a significant problem in liver transplantation and resectional surgery. In this paper, we explore the role T cells play in the pathogenesis of this injury. Materials & methods We used an in vivo murine model of warm partial hepatic IRI, genetically-modified mice, in vivo antibody depletion, adoptive cell transfer and flow cytometry to determine which lymphocyte subsets contribute to pathology. Injury was assessed by measuring serum alanine aminotransfersase (ALT) and by histological examination of liver tissue sections. Results The absence of T cells (CD3εKO) is associated with significant protection from injury (p = 0.010). Through a strategy of antibody depletion it appears that NKT cells (p = 0.0025), rather than conventional T (CD4 + or CD8 +) (p = 0.11) cells that are the key mediators of injury. Discussion Our results indicate that tissue-resident NKT cells, but not other lymphocyte populations are responsible for the injury in hepatic IRI. Targeting the activation of NKT cells and/or their effector apparatus would be a novel approach in protecting the liver during transplantation and resection surgery; this may allow us to expand our current criteria for surgery. Hepatic IRI worsens outcome in liver transplantation. T cells are important in hepatic IRI. These are tissue-resident rather than recruited T cells. NKT, but not conventional T or NK cells, are key mediators of hepatic IRI. Targeting NKT activation or their effector apparatus may offer therapeutic potential.
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Schuster CJ, Pang DSJ. Forced-air pre-warming prevents peri-anaesthetic hypothermia and shortens recovery in adult rats. Lab Anim 2017; 52:142-151. [PMID: 28599579 DOI: 10.1177/0023677217712539] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
General anaesthesia disrupts thermoregulation in mammals, which can cause hypothermia. Decreases in core body temperature of 1℃ cause significant postoperative complications in humans, and peri-anaesthetic hypothermia in mice increases data variability, which can potentially increase animal use. In rats, the impact of different temperature management strategies on the incidence and severity of hypothermia, and the accuracy of different temperature measurement methods, is unknown. Eighteen adult male and female SD rats were block-randomized to one of three treatment groups: no-warming (NW), limited-warming (LW, heat pad during anaesthesia), and pre-warming (PW, warm air exposure before anaesthesia, followed by heat pad). Anaesthesia (isoflurane) duration was for 40 min. Core body temperature (intra-abdominal telemetric temperature capsule) was recorded during anaesthesia and recovery. During anaesthesia, rectal, skin, and tail temperatures were also recorded. In the PW group, core temperature was maintained during anaesthesia and recovery. By contrast, the NW group was hypothermic (11% temperature decrease) during anaesthesia. The LW group showed a decrease in temperature during recovery. Recovery to sternal recumbency was significantly faster in the PW (125 [70-186] s, P = 0.0003) and the LW (188 [169-420] s, P = 0.04) groups than in the NW group (525 [229-652] s). Rectal temperature underestimated core temperature (bias -0.90℃, 95% limits of agreement -0.1 to 1.9℃). Skin and tail temperatures showed wide 95% limits of agreement, spanning 6 to 15℃, respectively. The novel strategy of PW was effective at maintaining core temperature during and after anaesthesia. Rectal temperature provided an acceptable proxy for core body temperature.
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Affiliation(s)
- C J Schuster
- Department of Veterinary Clinical and Diagnostic Sciences, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - D S J Pang
- Department of Veterinary Clinical and Diagnostic Sciences, Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
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Lee JK, Lee S, Baek MC, Lee BH, Lee HS, Kwon TK, Park PH, Shin TY, Khang D, Kim SH. Association between perfluorooctanoic acid exposure and degranulation of mast cells in allergic inflammation. J Appl Toxicol 2016; 37:554-562. [DOI: 10.1002/jat.3389] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 08/10/2016] [Accepted: 08/21/2016] [Indexed: 12/19/2022]
Affiliation(s)
- Jun-Kyoung Lee
- CMRI, Departments of Pharmacology; Kyungpook National University; Daegu Republic of Korea
| | - Soyoung Lee
- CMRI, Departments of Pharmacology; Kyungpook National University; Daegu Republic of Korea
- Natural Product Research Center, Research Institute of Bioscience and Biotechnology; Jeongeup Republic of Korea
| | - Moon-Chang Baek
- Molecular Medicine; Kyungpook National University; Daegu Republic of Korea
| | - Byung-Heon Lee
- Biochemistry and Cell Biology; School of Medicine, Kyungpook National University; Daegu Republic of Korea
| | - Hyun-Shik Lee
- School of Life Science, Kyungpook National University; Daegu Republic of Korea
| | - Taeg Kyu Kwon
- Department of Immunology; School of Medicine, Keimyung University; Daegu Republic of Korea
| | - Pil-Hoon Park
- College of Pharmacy; Yeungnam University; Gyeongsan Republic of Korea
| | - Tae-Yong Shin
- College of Pharmacy; Woosuk University; Jeonju Republic of Korea
| | - Dongwoo Khang
- Department of Physiology; School of Medicine, Gachon University; Incheon Republic of Korea
| | - Sang-Hyun Kim
- CMRI, Departments of Pharmacology; Kyungpook National University; Daegu Republic of Korea
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Li DY, Shi XJ, Li W, Du XH, Wang GY. Key Points in Establishing a Model of Mouse Liver Transplantation. Transplant Proc 2016; 47:2683-9. [PMID: 26680072 DOI: 10.1016/j.transproceed.2015.07.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 07/14/2015] [Indexed: 12/14/2022]
Abstract
The explosion of interest in research into the mouse genome and immune system has meant that the mouse orthotopic liver transplantation (MOLT) model has become a popular means of studying transplantation immunity, organ preservation, ischemia-reperfusion injury, and surgical techniques, among others. Although numerous modifications and refinements of surgical techniques have simplified the operation, the relatively short duration of postoperative survival after MOLT remains an obstacle to longer-term follow-up studies. Here, we summarize the scientific basis of MOLT and our experience improving and refining the model in six key areas: anesthesia, operative technique, perfusion and preservation of the liver, cuff technique, anhepatic time, and the value of rearterialization for the liver graft. We also compare the characteristics of different surgical techniques, and give recommendations for the best means of tailoring technique to the objectives of a study. In doing so, we aim to assist other investigators in establishing and perfecting the MOLT model in their routine research practice.
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Affiliation(s)
- D-Y Li
- Department of Hepatobiliary & Pancreatic Surgery, the First Norman Bethune Hospital Affiliated to Jilin University, Jilin Province, China
| | - X-J Shi
- Department of Hepatobiliary & Pancreatic Surgery, the First Norman Bethune Hospital Affiliated to Jilin University, Jilin Province, China
| | - W Li
- Department of Hepatobiliary & Pancreatic Surgery, Third Hospital (China-Japan Union Hospital) of Jilin University, Jilin Province, China
| | - X-H Du
- Department of Hepatobiliary & Pancreatic Surgery, the First Norman Bethune Hospital Affiliated to Jilin University, Jilin Province, China
| | - G-Y Wang
- Department of Hepatobiliary & Pancreatic Surgery, the First Norman Bethune Hospital Affiliated to Jilin University, Jilin Province, China.
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Marschner JA, Schäfer H, Holderied A, Anders HJ. Optimizing Mouse Surgery with Online Rectal Temperature Monitoring and Preoperative Heat Supply. Effects on Post-Ischemic Acute Kidney Injury. PLoS One 2016; 11:e0149489. [PMID: 26890071 PMCID: PMC4758659 DOI: 10.1371/journal.pone.0149489] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 02/02/2016] [Indexed: 12/31/2022] Open
Abstract
Body temperature affects outcomes of tissue injury. We hypothesized that online body core temperature recording and selective interventions help to standardize peri-interventional temperature control and the reliability of outcomes in experimental renal ischemia reperfusion injury (IRI). We recorded core temperature in up to seven mice in parallel using a Thermes USB recorder and ret-3-iso rectal probes with three different protocols. Setup A: Heating pad during ischemia time; Setup B: Heating pad from incision to wound closure; Setup C: A ventilated heating chamber before surgery and during ischemia time with surgeries performed on a heating pad. Temperature profile recording displayed significant declines upon installing anesthesia. The profile of the baseline experimental setup A revealed that <1% of the temperature readings were within the target range of 36.5 to 38.5°C. Setup B and C increased the target range readings to 34.6 ± 28.0% and 99.3 ± 1.5%, respectively. Setup C significantly increased S3 tubular necrosis, neutrophil influx, and mRNA expression of kidney injury markers. In addition, using setup C different ischemia times generated a linear correlation with acute tubular necrosis parameters at a low variability, which further correlated with the degree of kidney atrophy 5 weeks after surgery. Changing temperature control setup A to C was equivalent to 10 minutes more ischemia time. We conclude that body temperature drops quickly in mice upon initiating anesthesia. Immediate heat supply, e.g. in a ventilated heating chamber, and online core temperature monitoring can help to standardize and optimize experimental outcomes.
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Affiliation(s)
- Julian A. Marschner
- Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Munich, Germany
| | - Hannah Schäfer
- Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Munich, Germany
| | - Alexander Holderied
- Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Munich, Germany
| | - Hans-Joachim Anders
- Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Munich, Germany
- * E-mail:
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Abstract
The surgical procedure of two-thirds partial hepatectomy (PH) in rodents was first described more than 80 years ago by Higgins and Anderson. Nevertheless, this technique is still a state-of-the-art method for the community of liver researchers as it allows the in-depth analysis of signalling pathways involved in liver regeneration and hepatocarcinogenesis. The importance of PH as a key method in experimental hepatology has even increased in the last decade due to the increasing availability of genetically-modified mouse strains. Here, we propose a standard operating procedure (SOP) for the implementation of PH in mice, which is based on our experience of more than 10 years. In particular, the SOP offers all relevant background information on the PH model and provides comprehensive guidelines for planning and performing PH experiments. We provide established recommendations regarding optimal age and gender of animals, use of appropriate anaesthesia and biometric calculation of the experiments. We finally present an easy-to-follow step-by-step description of the complete surgical procedure including required materials, critical steps and postoperative management. This SOP especially takes into account the latest changes in animal welfare rules in the European Union but is still in agreement with current international regulations. In summary, this article provides comprehensive information for the legal application, design and implementation of PH experiments.
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Affiliation(s)
- Y A Nevzorova
- Department of Internal Medicine III, RWTH University Hospital Aachen, Aachen, Germany
| | - R Tolba
- Institute for Laboratory Animal Science & Experimental Surgery, RWTH Aachen University, Aachen, Germany
| | - C Trautwein
- Department of Internal Medicine III, RWTH University Hospital Aachen, Aachen, Germany
| | - C Liedtke
- Department of Internal Medicine III, RWTH University Hospital Aachen, Aachen, Germany
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Richards JA, Bucsaiova M, Hesketh EE, Ventre C, Henderson NC, Simpson K, Bellamy COC, Howie SEM, Anderton SM, Hughes J, Wigmore SJ. Acute Liver Injury Is Independent of B Cells or Immunoglobulin M. PLoS One 2015; 10:e0138688. [PMID: 26406765 PMCID: PMC4583453 DOI: 10.1371/journal.pone.0138688] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 09/02/2015] [Indexed: 01/08/2023] Open
Abstract
Background & Aims Acute liver injury is a clinically important pathology and results in the release of Danger Associated Molecular Patterns, which initiate an immune response. Withdrawal of the injurious agent and curtailing any pathogenic secondary immune response may allow spontaneous resolution of injury. The role B cells and Immunoglobulin M (IgM) play in acute liver injury is largely unknown and it was proposed that B cells and/or IgM would play a significant role in its pathogenesis. Methods Tissue from 3 models of experimental liver injury (ischemia-reperfusion injury, concanavalin A hepatitis and paracetamol-induced liver injury) and patients transplanted following paracetamol overdose were stained for evidence of IgM deposition. Mice deficient in B cells (and IgM) were used to dissect out the role B cells and/or IgM played in the development or resolution of injury. Serum transfer into mice lacking IgM was used to establish the role IgM plays in injury. Results Significant deposition of IgM was seen in the explanted livers of patients transplanted following paracetamol overdose as well as in 3 experimental models of acute liver injury (ischemia-reperfusion injury, concanavalin A hepatitis and paracetamol-induced liver injury). Serum transfer into IgM-deficient mice failed to reconstitute injury (p = 0.66), despite successful engraftment of IgM. Mice deficient in both T and B cells (RAG1-/-) mice (p<0.001), but not B cell deficient (μMT) mice (p = 0.93), were significantly protected from injury. Further interrogation with T cell deficient (CD3εKO) mice confirmed that the T cell component is a key mediator of sterile liver injury. Mice deficient in B cells and IgM mice did not have a significant delay in resolution following acute liver injury. Discussion IgM deposition appears to be common feature of both human and murine sterile liver injury. However, neither IgM nor B cells, play a significant role in the development of or resolution from acute liver injury. T cells appear to be key mediators of injury. In conclusion, the therapeutic targeting of IgM or B cells (e.g. with Rituximab) would have limited benefit in protecting patients from acute liver injury.
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Affiliation(s)
- James A. Richards
- MRC Centre for Inflammation Research, The University of Edinburgh, Edinburgh, United Kingdom
- Clinical Surgery, The University of Edinburgh, Edinburgh, United Kingdom
- * E-mail:
| | - Martina Bucsaiova
- MRC Centre for Inflammation Research, The University of Edinburgh, Edinburgh, United Kingdom
| | - Emily E. Hesketh
- MRC Centre for Inflammation Research, The University of Edinburgh, Edinburgh, United Kingdom
| | - Chiara Ventre
- MRC Centre for Inflammation Research, The University of Edinburgh, Edinburgh, United Kingdom
| | - Neil C. Henderson
- MRC Centre for Inflammation Research, The University of Edinburgh, Edinburgh, United Kingdom
- Hepatology, Division of Health Sciences, School of Clinical Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Kenneth Simpson
- Hepatology, Division of Health Sciences, School of Clinical Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Christopher O. C. Bellamy
- The University of Edinburgh, Edinburgh, United Kingdom
- Department of Pathology, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - Sarah E. M. Howie
- MRC Centre for Inflammation Research, The University of Edinburgh, Edinburgh, United Kingdom
| | - Stephen M. Anderton
- MRC Centre for Inflammation Research, The University of Edinburgh, Edinburgh, United Kingdom
| | - Jeremy Hughes
- MRC Centre for Inflammation Research, The University of Edinburgh, Edinburgh, United Kingdom
| | - Stephen J. Wigmore
- MRC Centre for Inflammation Research, The University of Edinburgh, Edinburgh, United Kingdom
- Clinical Surgery, The University of Edinburgh, Edinburgh, United Kingdom
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15
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Loi P, Yuan Q, Torres D, Delbauve S, Laute MA, Lalmand MC, Pétein M, Goriely S, Goldman M, Flamand V. Interferon regulatory factor 3 deficiency leads to interleukin-17-mediated liver ischemia-reperfusion injury. Hepatology 2013; 57:351-61. [PMID: 22911673 DOI: 10.1002/hep.26022] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Accepted: 08/01/2012] [Indexed: 01/08/2023]
Abstract
UNLABELLED Interferon regulatory factor 3 (IRF3) is an important transcription factor in Toll-like receptor 4 (TLR4) signaling, a pathway that is known to play a critical role in liver ischemia-reperfusion injury. In order to decipher the involvement of IRF3 in this setting, we first compared the intensity of hepatic lesions in IRF3-deficient versus wildtype mice. We found increased levels of blood transaminases, enhanced liver necrosis, and more pronounced neutrophil infiltrates in IRF3-deficient mice. Neutrophil depletion by administration of anti-Ly6G monoclonal antibody indicated that neutrophils play a dominant role in the development of severe liver necrosis in IRF3-deficient mice. Quantification of cytokine genes expression revealed increased liver expression of interleukin (IL)-12/IL-23p40, IL-23p19 messenger RNA (mRNA), and IL-17A mRNA in IRF3-deficient versus wildtype (WT) mice, whereas IL-27p28 mRNA expression was diminished in the absence of IRF3. The increased IL-17 production in IRF3-deficient mice was functionally relevant, as IL-17 neutralization prevented the enhanced hepatocellular damages and liver inflammation in these animals. Evidence for enhanced production of IL-23 and decreased accumulation of IL-27 cytokine in M1 type macrophage from IRF3-deficient mice was also observed after treatment with lipopolysaccharide, a setting in which liver gamma-delta T cells and invariant natural killer T cells were found to be involved in IL-17A hyperproduction. CONCLUSION IRF3-dependent events downstream of TLR4 control the IL-23/IL-17 axis in the liver and this regulatory role of IRF3 is relevant to liver ischemia-reperfusion injury.
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Affiliation(s)
- Patrizia Loi
- Institut d'Immunologie Médicale, Université Libre de Bruxelles, Gosselies, Belgium
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16
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Devey LR, Richards JA, O'Connor RA, Borthwick G, Clay S, Howie AF, Wigmore SJ, Anderton SM, Howie SEM. Ischemic preconditioning in the liver is independent of regulatory T cell activity. PLoS One 2012. [PMID: 23185394 PMCID: PMC3504160 DOI: 10.1371/journal.pone.0049647] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Ischemic preconditioning (IPC) protects organs from ischemia reperfusion injury (IRI) through unknown mechanisms. Effector T cell populations have been implicated in the pathogenesis of IRI, and T regulatory cells (Treg) have become a putative therapeutic target, with suggested involvement in IPC. We explored the role of Treg in hepatic IRI and IPC in detail. IPC significantly reduced injury following ischemia reperfusion insults. Treg were mobilized rapidly to the circulation and liver after IRI, but IPC did not further increase Treg numbers, nor was it associated with modulation of circulating pro-inflammatory chemokine or cytokine profiles. We used two techniques to deplete Treg from mice prior to IRI. Neither Treg depleted FoxP3.LuciDTR mice, nor wildtyoe mice depleted of Tregs with PC61, were more susceptible to IRI compared with controls. Despite successful enrichment of Treg in the liver, by adoptive transfer of both iTreg and nTreg or by in vivo expansion of Treg with IL-2/anti-IL-2 complexes, no protection against IRI was observed.We have explored the role of Treg in IRI and IPC using a variety of techniques to deplete and enrich them within both the liver and systemically. This work represents an important negative finding that Treg are not implicated in IPC and are unlikely to have translational potential in hepatic IRI.
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Affiliation(s)
- Luke R Devey
- Centre for Inflammation Research, The Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom.
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17
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Remote ischemic preconditioning by hindlimb occlusion prevents liver ischemic/reperfusion injury. Ann Surg 2011; 254:178-80. [PMID: 21606831 DOI: 10.1097/sla.0b013e318221ff34] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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18
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Roehl AB, Teubner A, Funcke S, Goetzenich A, Rossaint R, Tolba R, Hein M. Accidental renal injury by an external heating device during surgery in rats. Lab Anim 2010; 45:45-9. [PMID: 21183530 DOI: 10.1258/la.2010.010076] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Hypothermia can be caused by anaesthesia and/or surgery and represents a daily challenge in the operating room. Experimental animal surgery settings typically use heating pads or warming blankets to maintain the rodent's body temperature during long-lasting experiments. Warming is crucial in small animal experiments because these animals quickly lose temperature due to their large body surface to body weight ratio. While establishing a left ventricular infarction model in rats, we inserted a rectal temperature probe. The heating pad's set point was 37°C. Although a dual set point control circuit should prevent overheating, we observed a maximum heating pad's surface temperature of 43°C between the animal's back and the surface of the heating pad. At the end of the experiments, which lasted up to 8 h, the animals showed severe haematuria and segmental kidney damage. We hypothesized that overheating of the heating pad and uneven distribution of temperature led to kidney damage. Therefore, the maximal temperature of commonly used heating pads must be tightly controlled to avoid overheating, which may cause kidney or tissue injury, may falsify the experimental data and could influence the study results.
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Affiliation(s)
- A B Roehl
- Department of Anaesthesiology, RWTH Aachen University, Aachen, Germany.
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19
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c-Jun Terminal Kinase-2 Gene Deleted Mice Overexpress Hemeoxygenase-1 and Are Protected From Hepatic Ischemia Reperfusion Injury. Transplantation 2009; 88:308-16. [DOI: 10.1097/tp.0b013e3181ae3067] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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20
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Tissue-resident macrophages protect the liver from ischemia reperfusion injury via a heme oxygenase-1-dependent mechanism. Mol Ther 2008; 17:65-72. [PMID: 19002167 DOI: 10.1038/mt.2008.237] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Kupffer cells are the resident macrophage population of the liver and have previously been implicated in the pathogenesis of hepatic ischemia-reperfusion injury (IRI). Kupffer cells are the major site of expression of hepatic heme oxygenase-1 (HO-1), which has been shown to have anti-inflammatory actions and to protect animals and cells from oxidative injury. Kupffer cells and circulating monocytes were selectively ablated using liposomal clodronate (LC) in the CD11b DTR mouse before induction of hepatic ischemia. Kupffer cell depletion resulted in loss of HO-1 expression and increased susceptibility to hepatic IRI, whereas ablation of circulating monocytes did not affect IRI phenotype. Targeted deletion of HO-1 rendered mice highly susceptible to hepatic IRI. In vivo, HO-1 deletion resulted in pro-inflammatory Kupffer cell differentiation characterized by enhanced Ly6c and MARCO (macrophage receptor with collagenous structure) expression as well as decreased F4/80 expression, mirrored by an expansion in immature circulating monocytes. In vitro, HO-1 inhibition throughout macrophage differentiation led to increased cell numbers, and pro-inflammatory Ly6c+ CD11c- F4/80- phenotype. These data support a critical role for tissue-resident macrophages in homeostasis following ischemic injury, and a co-dependence of HO-1 expression and tissue-resident macrophage differentiation.
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