1
|
Post Mortem Study on the Effects of Routine Handling and Manipulation of Laboratory Mice. Animals (Basel) 2022; 12:ani12233234. [PMID: 36496755 PMCID: PMC9737896 DOI: 10.3390/ani12233234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 11/19/2022] [Accepted: 11/21/2022] [Indexed: 11/24/2022] Open
Abstract
Routine handling and manipulation of laboratory mice are integral components of most preclinical studies. Any type of handling and manipulation may cause stress and result in physical harm to mice, potentially leading to unintended consequences of experimental outcomes. Nevertheless, the pathological effects of these interventions are poorly documented and assumed to have a negligible effect on experimental variables. In that context, we provide a comprehensive post mortem overview of the main pathological changes associated with routine interventions (i.e., restraint, blood drawing, and intraperitoneal injections) of laboratory mice with an emphasis on presumed traumatic osteoarticular lesions. A total of 1000 mice from various studies were included, with 864 animals being heavily manipulated and 136 being handled for routine husbandry procedures only. The most common lesions observed were associated with blood collection or intraperitoneal injections, as well as a series of traumatic osteoarticular lesions likely resulting from restraint. Osteoarticular lesions were found in 62 animals (61 heavily manipulated; 1 unmanipulated) with rib fractures and avulsion of the dens of the axis being over-represented. Histopathology and micro-CT confirmed the traumatic nature of the rib fractures. While these lesions might be unavoidable if mice are manipulated according to the current standards, intentional training of research personnel on appropriate mouse handling and restraint techniques could help reduce their frequency and the impact on animal wellbeing as well as study reproducibility.
Collapse
|
2
|
Yancovich S, Wahba A. Pediatric Manubriosternal Dislocation: A Case Report and Review of Literature. Cureus 2021; 13:e14163. [PMID: 33936875 PMCID: PMC8080952 DOI: 10.7759/cureus.14163] [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: 11/16/2022] Open
Abstract
Pediatric sternal dislocation is an extremely rare event, with less than 15 cases reported in the literature. We report the case of a traumatic sternal segment dislocation in an 8-year-old male that was caused by an unsuccessful backflip resulting in a direct force to the chest. The diagnosis was made by chest computed tomography. Open reduction and internal fixation (ORIF) were performed with a good outcome noted at follow-up. In addition to a thorough description of this case, we have included an organized review of existing literature with an aim to establish trends in presentation, clinical course, and outcomes among sternal dislocation in the pediatric population.
Collapse
Affiliation(s)
- Shannon Yancovich
- Pediatrics, McGovern Medical School, University of Texas Health Science Center, Houston, USA
| | - Andrew Wahba
- Pediatrics, McGovern Medical School, University of Texas Health Science Center, Houston, USA
| |
Collapse
|
3
|
Plesker R, Köhler K, von Gerlach S, Boller K, Vogt M, Feder IS. Reactive mesothelial hyperplasia mimicking mesothelioma in an African green monkey ( Chlorocebus aethiops). Primate Biol 2020; 7:5-12. [PMID: 32760782 PMCID: PMC7399384 DOI: 10.5194/pb-7-5-2020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 05/12/2020] [Indexed: 11/22/2022] Open
Abstract
A spontaneous reactive mesothelial hyperplasia occurred in a
female, 15.7-year-old African green monkey (grivet; Chlorocebus aethiops). At necropsy, massive
effusions were found in the abdomen, the thorax, and the pericardium.
Additionally, multiple small, beige-gray nodules were detected on the
serosal surfaces of the abdominal organs. Histopathologically, the
mesothelial cells resembled the epithelioid subtype of a mesothelioma, but
no infiltrative or invasive growth could be demonstrated. The mesothelial
cells on the thoracis, liver, and intestinal serosa were accompanied by
chronic serositis. Mesothelial cells expressed cytokeratin, vimentin,
calretinin, desmin, Wilms Tumor 1 (WT-1) protein, and epithelial membrane
antigen (EMA). Cells were negative for carcinoembryonic antigen (CEA),
cluster of differentiation 15 (CD15), and podoplanin. Ultrastructurally,
cells revealed a moderate amount of microvilli of medium length, perinuclear
tonofilament bundles, and long desmosomes. In fluorescence in situ
hybridization (FISH) for the detection of characteristic gene loss (p16;
CDKN2A), NF2, and MTAP, no deletions were detected. No asbestos fibers and no
presence of Simian virus 40 antigen (SV40) could be demonstrated.
Collapse
Affiliation(s)
- Roland Plesker
- Paul-Ehrlich-Institut, Paul-Ehrlich-Str. 51-59, 63225 Langen, Germany
| | - Kernt Köhler
- Institut für Veterinär-Pathologie, Justus-Liebig-Universität Gießen, Gießen, Germany
| | - Susanne von Gerlach
- ÜGP MVZ, Institut für Pathologie, Zytologie und Molekularpathologie GbR, Wettenberg, Germany
| | - Klaus Boller
- Paul-Ehrlich-Institut, Paul-Ehrlich-Str. 51-59, 63225 Langen, Germany
| | - Markus Vogt
- Institut für Pathologie, Ruhr-Universität Bochum, Bochum, Germany
| | - Inke S Feder
- Institut für Pathologie, Ruhr-Universität Bochum, Bochum, Germany
| |
Collapse
|
4
|
Herbert E, Stewart M, Hutchison M, Flenniken AM, Qu D, Nutter LMJ, McKerlie C, Hobson L, Kick B, Lyons B, Wiegand JP, Doty R, Aguilar-Pimentel JA, Hrabe de Angelis M, Dickinson M, Seavitt J, White JK, Scudamore CL, Wells S. The occurrence of tarsal injuries in male mice of C57BL/6N substrains in multiple international mouse facilities. PLoS One 2020; 15:e0230162. [PMID: 32542000 PMCID: PMC7295225 DOI: 10.1371/journal.pone.0230162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 05/20/2020] [Indexed: 11/19/2022] Open
Abstract
Dislocation in hindlimb tarsals are being observed at a low, but persistent frequency in group-housed adult male mice from C57BL/6N substrains. Clinical signs included a sudden onset of mild to severe unilateral or bilateral tarsal abduction, swelling, abnormal hindlimb morphology and lameness. Contraction of digits and gait abnormalities were noted in multiple cases. Radiographical and histological examination revealed caudal dislocation of the calcaneus and partial dislocation of the calcaneoquartal (calcaneus-tarsal bone IV) joint. The detection, frequency, and cause of this pathology in five large mouse production and phenotyping centres (MRC Harwell, UK; The Jackson Laboratory, USA; The Centre for Phenogenomics, Canada; German Mouse Clinic, Germany; Baylor College of Medicine, USA) are discussed.
Collapse
Affiliation(s)
- Eleanor Herbert
- Department of Pathobiology and Population Sciences, Royal Veterinary College, Hertfordshire, United Kingdom
| | - Michelle Stewart
- Mary Lyon Centre, MRC Harwell Institute, Oxfordshire, United Kingdom
| | - Marie Hutchison
- Mary Lyon Centre, MRC Harwell Institute, Oxfordshire, United Kingdom
| | - Ann M Flenniken
- The Centre for Phenogenomics, Toronto, Ontario, Canada
- Lunenfeld-Tanenbaum Research Institute, Sinai Health, Toronto, Ontario, Canada
| | - Dawei Qu
- The Centre for Phenogenomics, Toronto, Ontario, Canada
- Lunenfeld-Tanenbaum Research Institute, Sinai Health, Toronto, Ontario, Canada
| | - Lauryl M J Nutter
- The Centre for Phenogenomics, Toronto, Ontario, Canada
- The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Colin McKerlie
- The Centre for Phenogenomics, Toronto, Ontario, Canada
- The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Liane Hobson
- Mary Lyon Centre, MRC Harwell Institute, Oxfordshire, United Kingdom
| | - Brenda Kick
- The Jackson Laboratory, Bar Harbor, Maine, United States of America
| | - Bonnie Lyons
- The Jackson Laboratory, Bar Harbor, Maine, United States of America
| | | | - Rosalinda Doty
- The Jackson Laboratory, Bar Harbor, Maine, United States of America
| | | | - Martin Hrabe de Angelis
- German Mouse Clinic, Institute of Experimental Genetics, Helmholtz Zentrum München, Neuherberg, Germany
- School of Life Science Weihenstephan, Technische Universität München, Freising, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Mary Dickinson
- Baylor College of Medicine, Houston, Texas, United States of America
| | - John Seavitt
- Baylor College of Medicine, Houston, Texas, United States of America
| | | | | | - Sara Wells
- Mary Lyon Centre, MRC Harwell Institute, Oxfordshire, United Kingdom
| |
Collapse
|
5
|
Goldsmith DA, Adaska JM. Bovine cardiac mesothelial hyperplasia: a common incidental finding in adult cattle. J Vet Diagn Invest 2019; 32:65-69. [PMID: 31833454 DOI: 10.1177/1040638719894552] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Cardiac mesothelial hyperplasia forming pale plaque lesions on the epicardial surface is a common incidental finding in the hearts of aged humans. A similar phenomenon with a more papillary appearance has also been reported as an incidental finding in dogs and mice. These lesions are believed to occur in response to friction between the epicardium and overlying pericardium. We investigated this lesion in adult cattle, a phenomenon that has been associated with bovine leukemia virus infection and epicardial lymphoma. We examined 73 hearts from adult cattle, predominantly of dairy breeds: 53 from a rendering facility and 20 from a state diagnostic laboratory. Cardiac mesothelial hyperplasia was much more prevalent in cattle than in other reported species (97% of examined hearts). The most common distribution was overlying the great vessels in a dark red papillary pattern. Cardiac mesothelial hyperplasia was also variably observed on all 4 cardiac chambers and the pericardium. Occasionally these lesions took on a smooth plaque-like appearance resembling those observed in humans. The lesions varied from 0.25 cm2 to covering 90% of the epicardial surface. No association was observed between cardiac mesothelial hyperplasia and bovine leukemia virus infection or cardiac lymphoma. Cardiac mesothelial hyperplasia was a common incidental finding in bovine hearts that must be distinguished from neoplasia and acute or chronic inflammation.
Collapse
Affiliation(s)
- Dayna A Goldsmith
- California Animal Health and Food Safety Laboratory System, School of Veterinary Medicine, University of California, Davis, CA
| | - John M Adaska
- California Animal Health and Food Safety Laboratory System, School of Veterinary Medicine, University of California, Davis, CA
| |
Collapse
|
6
|
Sarfaty AE, Zeiss CJ, Willis AD, Harris JM, Smith PC. Concentration-dependent Toxicity after Subcutaneous Administration of Meloxicam to C57BL/6N Mice ( Mus musculus). JOURNAL OF THE AMERICAN ASSOCIATION FOR LABORATORY ANIMAL SCIENCE 2019; 58:802-809. [PMID: 31540585 DOI: 10.30802/aalas-jaalas-19-000037] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Studies using the Mouse Grimace Scale have shown that for many NSAID, including meloxicam, minimal doses of at least 20 mg/kg may be necessary to achieve adequate peri- and post-operative analgesia in mice. However, more data are needed to determine whether such NSAID doses exceed the threshold for gastrointestinal ulceration or induce other relevant pathology. We administered equal volumes of saline or injectable meloxicam (1 or 5 mg/mL) at a dose of 20 mg/kg SC to 20 young adult male and female C57BL/6N mice daily for 6 d and performed necropsies on all mice on the seventh day. Mice given 5 mg/mL meloxicam subcutaneously developed significantly more severe pathology at the injection site than saline controls. Pathology was characterized by full-thickness epidermal necrosis; cavitary lesions within subcutis, muscle, or fat; steatitis; and myositis. Mice that received 1 mg/mL meloxicam subcutaneously developed lesions that were qualitatively similar but far less severe than those after 5 mg/mL. However, no pathologic lesions typically associated with NSAID toxicity, such as gastric ulceration and liver and kidney lesions, were seen. These results demonstrate that although meloxicam injected subcutaneously causes concentration-dependent skin pathology at the injection site, a dose of 20 mg/kg can be safely administered subcutaneously at a concentration of 1 mg/mL for as long as 6 d.
Collapse
Affiliation(s)
- Anna E Sarfaty
- Department of Comparative Medicine, Yale School of Medicine, New Haven, Connecticut
| | - Caroline J Zeiss
- Department of Comparative Medicine, Yale School of Medicine, New Haven, Connecticut
| | - Amy D Willis
- Department of Biostatistics, University of Washington, Seattle, Washington
| | - Jorgen M Harris
- Department of Economics, Cornell University, Ithaca, New York
| | - Peter C Smith
- Department of Comparative Medicine, Yale School of Medicine, New Haven, Connecticut
| |
Collapse
|
7
|
Treuting PM, Snyder JM, Ikeno Y, Schofield PN, Ward JM, Sundberg JP. The Vital Role of Pathology in Improving Reproducibility and Translational Relevance of Aging Studies in Rodents. Vet Pathol 2016; 53:244-9. [PMID: 26792843 PMCID: PMC4835687 DOI: 10.1177/0300985815620629] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Pathology is a discipline of medicine that adds great benefit to aging studies of rodents by integrating in vivo, biochemical, and molecular data. It is not possible to diagnose systemic illness, comorbidities, and proximate causes of death in aging studies without the morphologic context provided by histopathology. To date, many rodent aging studies do not utilize end points supported by systematic necropsy and histopathology, which leaves studies incomplete, contradictory, and difficult to interpret. As in traditional toxicity studies, if the effect of a drug, dietary treatment, or altered gene expression on aging is to be studied, systematic pathology analysis must be included to determine the causes of age-related illness, moribundity, and death. In this Commentary, the authors discuss the factors that should be considered in the design of aging studies in mice, with the inclusion of robust pathology practices modified after those developed by toxicologic and discovery research pathologists. Investigators in the field of aging must consider the use of histopathology in their rodent aging studies in this era of integrative and preclinical geriatric science (geroscience).
Collapse
Affiliation(s)
- P M Treuting
- Department of Comparative Medicine, School of Medicine, University of Washington, Seattle, WA, USA
| | - J M Snyder
- Department of Comparative Medicine, School of Medicine, University of Washington, Seattle, WA, USA
| | - Y Ikeno
- Barshop Institute and Department of Pathology, University of Texas Health Science Center at San Antonio; Research Service and Geriatric Research and Education Clinical Center, Audie L. Murphy VA Hospital, South Texas Veterans Health Care System, San Antonio, TX, USA
| | - P N Schofield
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK The Jackson Laboratory, Bar Harbor, ME, USA
| | - J M Ward
- Global VetPathology, Montgomery Village, MD, USA
| | | |
Collapse
|
8
|
Gunson DE, Carlson CS, Gropp KE. No Bones About It: The Challenges and Rewards of Osteopathology. Vet Pathol 2015; 52:766-9. [PMID: 26290180 DOI: 10.1177/0300985815593126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- D E Gunson
- Novartis Institutes for Biomedical Research, East Hanover, NJ, USA
| | | | - K E Gropp
- Pfizer Worldwide Research & Development, Groton, CT, USA
| |
Collapse
|