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Yasuda M, Ogura T, Goto T, Yagoto M, Kamai Y, Shimomura C, Hayashimoto N, Kiyokawa Y, Shinohara H, Takahashi R, Kawai K. Incidence of spontaneous lymphomas in non-experimental NOD/Shi-scid, IL-2Rγ null (NOG) mice. Exp Anim 2017; 66:425-435. [PMID: 28679969 PMCID: PMC5682355 DOI: 10.1538/expanim.17-0034] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Severely immunodeficient NOD/Shi-scid, IL-2Rγnull (NOG) mice provide an in vivo model for human cell/tissue transplantation studies. NOG mice were established by combining interleukin-2 receptor-γ chain knockout mice and NOD/Shi-scid mice. They exhibit a high incidence of thymic lymphomas and immunoglobulin (Ig) leakiness. In this study, we assessed the incidence of malignant lymphomas and the occurrence of leakiness in 2,184 non-experimental NOG retired breeder mice aged 16-40 weeks. We established that the total incidence of lymphomas was only 0.60% (13/2,184). Most lymphomas (10/13) occurred in female mice by the age of around 25 weeks. No mice developed Ig leakiness. All lymphomas were derived from the thymus, and consisted mainly of CD3-positive and CD45R-negative lymphoblastic-like cells. Therefore, based on the absence of Ig leakiness and a very low incidence of lymphomas, including thymic lymphomas, NOG mice may be useful in regeneration medicine for xenotransplantation of human embryonic stem (ES) cells or induced pluripotent stem (iPS) cells, and in transplantation experiments involving tumor cells.
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Affiliation(s)
- Masahiko Yasuda
- Pathology Analysis Center, Central Institute for Experimental Animals (CIEA), 3-25-12 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-0821, Japan
| | - Tomoyuki Ogura
- Animal Resources Center, Central Institute for Experimental Animals (CIEA), 3-25-12 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-0821, Japan
| | - Takayuki Goto
- Technical Service Department, CLEA Japan, Inc., 4839-23 Kitayama, Fujinomiya, Shizuoka 418-0112, Japan
| | - Mika Yagoto
- Pathology Analysis Center, Central Institute for Experimental Animals (CIEA), 3-25-12 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-0821, Japan
| | - Yoko Kamai
- Pathology Analysis Center, Central Institute for Experimental Animals (CIEA), 3-25-12 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-0821, Japan
| | - Chie Shimomura
- Technical Service Department, CLEA Japan, Inc., 4839-23 Kitayama, Fujinomiya, Shizuoka 418-0112, Japan
| | - Nobuhito Hayashimoto
- ICLAS Monitoring Center, Central Institute for Experimental Animals (CIEA), 3-25-12 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-0821, Japan
| | - Yukito Kiyokawa
- Technical Service Department, CLEA Japan, Inc., 4839-23 Kitayama, Fujinomiya, Shizuoka 418-0112, Japan
| | - Hideki Shinohara
- Technical Service Department, CLEA Japan, Inc., 4839-23 Kitayama, Fujinomiya, Shizuoka 418-0112, Japan
| | - Riichi Takahashi
- Animal Resources Center, Central Institute for Experimental Animals (CIEA), 3-25-12 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-0821, Japan
| | - Kenji Kawai
- Pathology Analysis Center, Central Institute for Experimental Animals (CIEA), 3-25-12 Tonomachi, Kawasaki-ku, Kawasaki, Kanagawa 210-0821, Japan
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Abstract
While an understanding of the structure and function of a generically described immune system is essential in contemporary biomedicine, it is clear that a one-size-fits-all approach applied across multiple species is fraught with contradictions and inconsistencies. Nevertheless, the breakthroughs achieved in immunology following the application of observations in murine systems to that of man have been pivotal in the advancement of biology and human medicine. However, as additional species have been used to further address biologic and safety assessment questions relative to the structure and function of the immune system, it has become clear that there are differences across species, gender, age and strain that must be considered. The meaningfulness of these differences must be determined on a case-by-case basis. This review article attempts to collect, consolidate and discuss some of these species differences thereby aiding in the accurate placement of new observations in a proper immunobiological and immunopathological perspective.
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Affiliation(s)
- Patrick J. Haley
- Independent Consultant specializing in Immunotoxicology and Immunopathology, 852 Penns Way, West Chester, Pennsylvania, USA 19382
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Galindo-Cardiel I, Ballester M, Solanes D, Nofrarías M, López-Soria S, Argilaguet JM, Lacasta A, Accensi F, Rodríguez F, Segalés J. Standardization of pathological investigations in the framework of experimental ASFV infections. Virus Res 2013; 173:180-90. [PMID: 23313935 DOI: 10.1016/j.virusres.2012.12.018] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2012] [Revised: 12/14/2012] [Accepted: 12/14/2012] [Indexed: 10/27/2022]
Abstract
African swine fever is still one of the major viral diseases of swine for which a commercial vaccine is lacking. For the design and development of such preventive products, researchers involved in African swine fever virus (ASFV) vaccinology need standardized challenge protocols and well characterized clinical, pathological and immunological responses of inbreed and outbreed pigs to different viral strains and vaccine-like products. The different approaches used should be assessed by immunologist, virologist and pathologist expertise. The main objectives of this guideline are to (1) briefly contextualize the clinical and pathological ASFV presentations focusing on points that are critical for pathogenesis, (2) provide recommendations concerning the analysis of clinical, gross and microscopic observations and (3) standardize the pathological report, the terminology employed and the evaluation of the severity of the lesions between the ASFV research groups for comparing inter-group data. The presented guidelines establish new approaches to integrate such relevant pathological data with virological and immunological testing, giving support to the global interpretation of the findings in the future experiments of ASFV-related vaccinology and immunology.
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Affiliation(s)
- Iván Galindo-Cardiel
- Centre de Recerca en Sanitat Animal, UAB-IRTA, Edifici CReSA, Campus UAB, 08193 Bellaterra, Barcelona, Spain.
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Abstract
The immune system functions primarily as a defense mechanism to provide protective immunity against microbial pathogens and cancer. The resulting protective responses occur through the complex interaction of tissues, cells, proteins, and molecular pathways that act in concert with other systems (e.g., nervous and endocrine) to provide the host with immunologic responses that cause pathologic processes seen primarily as inflammatory reactions. The pathologic responses can be attributed to either normal responses to infectious organisms and cancer cells, misdirected responses as in the case of hypersensitivity or autoimmune diseases, or deficient responses attributable to deficiencies or defects in components of the immune system. Pathologists need to have a basic understanding of the immune system to not only interpret findings as to their likely pathogenesis, but also to predict when the immune system may be a potential target. This review will be limited to a general overview of the basic immunologic responses and primary components involved.
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Affiliation(s)
- Paul W Snyder
- Department of Comparative Pathobiology, School of Veterinary Medicine, Purdue University, West Lafayette, Indiana 47907-2027, USA.
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Pearse G, Pietersma A, Cunliffe J, Foster JR, Turton J, Derbyshire N, Randall KJ. Time-course study of the immunotoxic effects of the anticancer drug chlorambucil in the rat. Toxicol Pathol 2010; 37:887-901. [PMID: 19805614 DOI: 10.1177/0192623309347907] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In 2005, the International conference on harmonization (ICH) recommended that all new human pharmaceuticals be tested for unintended immunomodulatory potential via a tiered approach. Included in this approach is a semiquantitative description of changes in the separate compartments of lymphoid tissue (also called enhanced histopathology). Chlorambucil was administered to Hanover Wistar rats at regular time points, followed by a treatment-free (recovery) period. Groups of treated and control animals were sacrificed regularly during both the treatment and recovery periods. Selected tissues were removed, weighed fresh and fixed in formalin, processed, and stained with hematoxylin and eosin. Blood samples and bone marrow smears were also obtained. With the use of enhanced histopathology, a description of the changes in lymphoid tissues and bone marrow was used as a means of assessing the susceptibility, and recovery, of the different lymphoid cell populations over time. A correlation with organ weights, flow cytometry data, and bone marrow cytology was achieved. The administration of chlorambucil in the Hanover Wistar rat provided a useful tool to examine the rate and sequence of changes in the lymphoid organs and bone marrow during treatment with, and the recovery from the effects of, a potent immunosuppressive agent.
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Affiliation(s)
- Gail Pearse
- AstraZeneca, Safety Assessment UK, Mereside, Alderley Park, Macclesfield, Cheshire, UK
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Abstract
The evolution of the subdiscipline of developmental immunotoxicology (DIT) as it exists today has been shaped by significant regulatory pressures as well as key scientific advances. This review considers the role played by legislation to protect children’s health, and on the emergence of immunotoxcity and developmental immunotoxicity guidelines, as well as providing some context to the need for special attention on DIT by considering the evidence that the developing immune system may have unique susceptibilities when compared to the adult immune system. Understanding the full extent of this potential has been complicated by a paucity of data detailing the development of the immune system during critical life stages as well as by the complexities of comparisons across species. Notably, there are differences between humans and nonhuman species used in toxicity testing that include specific differences relative to the timing of the development of the immune system as well as more general anatomic differences, and these differences must be factored into the interpretation of DIT studies. Likewise, understanding how the timing of the immune development impacts on various immune parameters is critical to the design of DIT studies, parameters most extensively characterized to date in young adult animals. Other factors important to DIT, which are considered in this review, are the recognition that effects other than suppression (e.g., allergy and autoimmunity) are important; the need to improve our understanding of how to assess the potential for DIT in humans; and the role that pathology has played in DIT studies in test animals. The latter point receives special emphasis in this review because pathology evaluations have been a major component of standard nonclinical toxicology studies, and could serve an important role in studies to evaluate DIT. This possibility is very consistent with recommendations to incorporate a DIT evaluation into standard developmental and reproductive toxicology (DART) protocols. The overall objective of this review is to provide a ‘snapshot’ of the current state-of-the-science of DIT. Despite significant progress, DIT is still evolving and it is our hope that this review will advance the science.
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Affiliation(s)
- Leigh Ann Burns-Naas
- Drug Safety Research and Development, Pfizer Global Research and Development, San Diego, CA 92064, California, USA
| | - Kenneth L. Hastings
- United States Food and Drug Administration, Center for Drug Evaluation Research, Office of New Drugs, Rockville, Maryland, USA
| | | | - Susan L. Makris
- United States Environmental Protection Agency, National Center for Environmental Assessment, Washington, DC, USA
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