1
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Ahidjo N, Maidawa Yaya F, Njamnshi WY, Rissia-Ngo Pambe JC, Ndianteng EW, Nwasike CNC, Kemmo C, Choupo AC, Meka’a Zang LY, Pieme AC, Vecchio L, Ngadjui BT, Njamnshi AK, Seke Etet PF. Therapeutic potential of Garcinia kola against experimental toxoplasmosis in rats. Brain Commun 2024; 6:fcae255. [PMID: 39130514 PMCID: PMC11316209 DOI: 10.1093/braincomms/fcae255] [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: 12/28/2023] [Revised: 06/19/2024] [Accepted: 08/03/2024] [Indexed: 08/13/2024] Open
Abstract
Cerebral toxoplasmosis, the most common opportunistic infection in immunocompromised individuals, is increasingly reported in immunocompetent individuals due to mutant strains of Toxoplasma gondii, which, furthermore, are reported to be resistant to available treatments. We assessed the therapeutic potential of Garcinia kola, a medicinal plant reported to have antiplasmodial and neuroprotective properties, against experimental toxoplasmosis in rats. Severe toxoplasmosis was induced in male Wistar rats (156.7 ± 4.1 g) by injecting them with 10 million tachyzoites in suspension in 500 µl of saline (intraperitoneal), and exclusive feeding with a low-protein diet [7% protein (weight by weight)]. Then, animals were treated with hexane, dichloromethane, and ethyl acetate fractions of Garcinia kola. Footprints were analysed and open-field and elevated plus maze ethological tests were performed when symptoms of severe disease were observed in the infected controls. After sacrifice, blood samples were processed for Giemsa staining, organs were processed for haematoxylin and eosin staining, and brains were processed for Nissl staining and cell counting. Compared with non-infected animals, the infected control animals had significantly lower body weights (30.27%↓, P = 0.001), higher body temperatures (P = 0.033) during the sacrifice, together with signs of cognitive impairment and neurologic deficits such as lower open-field arena centre entries (P < 0.001), elevated plus maze open-arm time (P = 0.029) and decreased stride lengths and step widths (P < 0.001), as well as neuronal loss in various brain areas. The ethyl acetate fraction of Garcinia kola prevented or mitigated most of these signs. Our data suggest that the ethyl acetate fraction of Garcinia kola has therapeutic potential against cerebral toxoplasmosis.
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Affiliation(s)
- Nene Ahidjo
- Brain Research Africa Initiative (BRAIN), Yaoundé, Cameroon
- Faculty of Medicine and Biomedical Sciences, Neuroscience Laboratory, The University of Yaoundé I, Yaoundé, Cameroon
| | - Frederic Maidawa Yaya
- Faculty of Medicine and Biomedical Sciences, Neuroscience Laboratory, The University of Yaoundé I, Yaoundé, Cameroon
- Department of Physiological Sciences and Biochemistry, Faculty of Medicine and Biomedical Sciences, Center for Sustainable Health and Development, University of Garoua, Garoua, Cameroon
| | - Wepnyu Y Njamnshi
- Brain Research Africa Initiative (BRAIN), Yaoundé, Cameroon
- Faculty of Medicine and Biomedical Sciences, Neuroscience Laboratory, The University of Yaoundé I, Yaoundé, Cameroon
| | - Judith C Rissia-Ngo Pambe
- Department of Morphological Sciences and Pathological Anatomy, Faculty of Medicine and Biomedical Sciences, University of Garoua, Garoua, Cameroon
| | - Ethel W Ndianteng
- Faculty of Medicine and Biomedical Sciences, Neuroscience Laboratory, The University of Yaoundé I, Yaoundé, Cameroon
| | - Caroline N C Nwasike
- Faculty of Medicine and Biomedical Sciences, Neuroscience Laboratory, The University of Yaoundé I, Yaoundé, Cameroon
| | - Christelle Kemmo
- Faculty of Medicine and Biomedical Sciences, Neuroscience Laboratory, The University of Yaoundé I, Yaoundé, Cameroon
| | - Arnaud C Choupo
- Faculty of Medicine and Biomedical Sciences, Laboratory of Biochemistry, University of Yaoundé I, Yaoundé, Cameroon
| | - Luc Yvan Meka’a Zang
- Faculty of Medicine and Biomedical Sciences, Neuroscience Laboratory, The University of Yaoundé I, Yaoundé, Cameroon
| | - Anatole C Pieme
- Faculty of Medicine and Biomedical Sciences, Laboratory of Biochemistry, University of Yaoundé I, Yaoundé, Cameroon
| | - Lorella Vecchio
- Brain Research Africa Initiative (BRAIN), Yaoundé, Cameroon
- Department of Physiological Sciences and Biochemistry, Faculty of Medicine and Biomedical Sciences, Center for Sustainable Health and Development, University of Garoua, Garoua, Cameroon
| | | | - Alfred K Njamnshi
- Brain Research Africa Initiative (BRAIN), Yaoundé, Cameroon
- Faculty of Medicine and Biomedical Sciences, Neuroscience Laboratory, The University of Yaoundé I, Yaoundé, Cameroon
| | - Paul F Seke Etet
- Brain Research Africa Initiative (BRAIN), Yaoundé, Cameroon
- Faculty of Medicine and Biomedical Sciences, Neuroscience Laboratory, The University of Yaoundé I, Yaoundé, Cameroon
- Department of Physiological Sciences and Biochemistry, Faculty of Medicine and Biomedical Sciences, Center for Sustainable Health and Development, University of Garoua, Garoua, Cameroon
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Johnson VJ, Rider CV, Luster MI, Brix A, Burleson GR, Cora M, Elmore SA, Frawley RP, Lopez FR, Mutlu E, Shockley KR, Pierfelice J, Burback B, Co CA, Germolec DR. Immunotoxicity of N-butylbenzenesulfonamide: impacts on immune function in adult mice and developmentally exposed rats. Toxicol Sci 2023; 196:71-84. [PMID: 37584675 PMCID: PMC10613960 DOI: 10.1093/toxsci/kfad083] [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] [Indexed: 08/17/2023] Open
Abstract
N-butylbenzenesulfonamide (NBBS) is a high-production volume plasticizer that is an emerging contaminant of concern for environmental and human health. To understand the risks and health effects of exposure to NBBS, studies were conducted in adult-exposed mice and developmentally exposed rats to evaluate the potential for NBBS to modulate the immune system. Beginning between 8 and 9 weeks of age, dosed feed containing NBBS at concentrations of 0, 313, 625, 1250, 2500, and 5000 ppm was continuously provided to B6C3F1/N female mice for 28 days. Dosed feed was also continuously provided to time-mated Harlan Sprague Dawley (Sprague Dawley SD) rats at concentrations of 0-, 250-, 500-, and 1000-ppm NBBS from gestation day 6 to postnatal day 28 and in F1 rats until 11-14 weeks of age. Functional assessments of innate, humoral, and cell-mediated immunity were conducted in adult female mice and F1 rats following exposure to NBBS. In female mice, NBBS treatment suppressed the antibody-forming cell (AFC) response to SRBC with small increases in T-cell responses and natural killer (NK)-cell activity. In developmentally exposed rats, NBBS treatment-related immune effects were sex dependent. A positive trend in NK-cell activity occurred in male F1 rats while a negative trend occurred in female F1 rats. The AFC response to SRBC was decreased in female F1 rats but not in male F1 rats. These data provide evidence that oral exposure to NBBS has the potential to produce immunomodulatory effects on both innate and adaptive immune responses, and these effects appear to have some dependence on species, sex, and period of exposure (developmental vs adult).
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Affiliation(s)
- Victor J Johnson
- Burleson Research Technologies, Inc, Morrisville, North Carolina 27560, United States
| | - Cynthia V Rider
- Division of Translational Toxicology, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, United States
| | - Michael I Luster
- Burleson Research Technologies, Inc, Morrisville, North Carolina 27560, United States
| | - Amy Brix
- Experimental Pathology Laboratories, Inc, Research Triangle Park, North Carolina 27709, United States
| | - Gary R Burleson
- Burleson Research Technologies, Inc, Morrisville, North Carolina 27560, United States
| | - Michelle Cora
- Division of Translational Toxicology, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, United States
| | - Susan A Elmore
- Division of Translational Toxicology, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, United States
| | - Rachel P Frawley
- Division of Translational Toxicology, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, United States
| | - Franklin R Lopez
- Charles River Laboratories, Durham, North Carolina 27703, United States
| | - Esra Mutlu
- Division of Translational Toxicology, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, United States
| | - Keith R Shockley
- Division of Translational Toxicology, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, United States
- Division of Intramural Research, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, United States
| | | | | | - Caroll A Co
- Social and Scientific Systems Inc., a DLH Holdings Corp Company, Durham, North Carolina 27703, United States
| | - Dori R Germolec
- Division of Translational Toxicology, National Institute of Environmental Health Sciences, NIH, Research Triangle Park, North Carolina 27709, United States
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Maronpot RR, Streicker M, Mahapatra D, Moore R, Koyanagi M, Chiba S, Nishino M, Hayashi SM. Twelve-month in utero safety assessment of gardenia blue, a natural food colorant. J Toxicol Pathol 2023; 36:171-179. [PMID: 37577364 PMCID: PMC10412961 DOI: 10.1293/tox.2023-0030] [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] [Received: 02/18/2023] [Accepted: 03/22/2023] [Indexed: 08/15/2023] Open
Abstract
Toxicity assessment of the food colorant Gardenia jasminoides Ellis at dietary exposures of 0.0%, 0.1%, 0.5%, 1.5%, 3.0% and 5.0% included measures of T-cell- dependent antibody response, neurotoxicity, and clinical and anatomic pathology in Sprague Dawley rats during mating, gestation, lactation, postnatal development, and following weaning for up to 12 months including 3- and 6-month interim evaluations. Blue coloration of the gastrointestinal tract, mesenteric lymph nodes and kidneys was present in treated rats only at necropsy with minimal blue coloration at the lowest dose and without histopathological correlates in any of the tissues. There was good survival with no consistent treatment-related changes in hematology, clinical chemistry, enhanced evaluation of lymphoid tissues, or tissue histopathology at interim and final time points. T-cell dependent antibody response and neurotoxicity screening were negative in treated rats. The no-observed-adverse-effect level (NOAEL) was determined to be 5.0% gardenia blue (2,854.5 and 3,465.4 mg/kg/day in parental males and females, respectively, prior to mating; 3,113.5 and 4,049.6 mg/kg/day in male and female offspring, respectively, following up to 12 months of exposure.
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Affiliation(s)
- Robert R. Maronpot
- Maronpot Consulting, 1612 Medfield Road, Raleigh, North
Carolina, 27607 USA
| | - Michael Streicker
- Inotiv, PO Box 13501, Research Triangle Park, North
Carolina, 27709 USA
| | | | - Rebecca Moore
- Inotiv, PO Box 13501, Research Triangle Park, North
Carolina, 27709 USA
| | - Mihoko Koyanagi
- San-Ei Gen F. F. I., Inc., 1-1-11 Sanwa-cho, Toyonaka, Osaka
561-8588, Japan
| | - Shuichi Chiba
- San-Ei Gen F. F. I., Inc., 1-1-11 Sanwa-cho, Toyonaka, Osaka
561-8588, Japan
| | - Masayuki Nishino
- San-Ei Gen F. F. I., Inc., 1-1-11 Sanwa-cho, Toyonaka, Osaka
561-8588, Japan
| | - Shim-mo Hayashi
- Tokyo University of Agriculture and Technology, 3-5-8
Saiwaicho, Fuchu-shi, Tokyo 183-8509, Japan
- National Institute of Health Sciences, 3-25-26 Tonomachi,
Kawasaki-ku, Kawasaki-shi, Kanagawa 210-9501, Japan
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Papenfuss TL, Himmel L, Kuper CF, Mohanan S, Harleman J, Elmore SA. Toxicologic Pathology Forum: Considerations Regarding Determination of Adversity for Immunopathology Findings in Nonclinical Toxicology Studies with Immune-Modulating Therapeutics. Toxicol Pathol 2023; 51:205-215. [PMID: 37578155 DOI: 10.1177/01926233231190382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
The evaluation of changes in the immune system serves to determine the efficacy and potential immunotoxicologic effects of new products under development. Toxicologic pathologists play critical roles in identifying immune system changes that drive the immunosafety determination. Standard pathology evaluations of therapies and chemicals remain similar; however, biopharmaceutical therapies have moved from simply affecting the immune system to being specifically developed to modify the immune system, which can impact interpretation. Recent explosive growth in immunomodulatory therapies presents a challenge to the toxicologic pathologist, toxicologist, and regulatory reviewer in terms of evaluating the clinical relevance and potential adversity of immune system changes. Beyond the recognition of such changes, there is an increasing expectation to evaluate, describe, and interpret how therapies affect complex immune system pathways for both immunomodulatory therapies and non-immunomodulatory drugs with off-target immunotoxic effects. In this opinion piece, considerations regarding immune system evaluation, the current landscape of immunomodulatory therapies, a brief description of immunotoxicologic (and immunopathologic) endpoints, the importance of integrating such immunosafety data, and relevance to adversity determination are discussed. Importantly, we describe how the current paradigm of determining adversity for immune system changes may be challenging or insufficient and propose a harmonized and flexible approach for assessing adversity.
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Krautmann M, Walters RR, King VL, Esch K, Mahabir SP, Gonzales A, Dominowski PJ, Sly L, Mwangi D, Foss DL, Rai S, Messamore JE, Gagnon G, Schoell A, Dunham SA, Martinon OM. Laboratory safety evaluation of lokivetmab, a canine anti-interleukin-31 monoclonal antibody, in dogs. Vet Immunol Immunopathol 2023; 258:110574. [PMID: 36842258 DOI: 10.1016/j.vetimm.2023.110574] [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: 06/20/2022] [Revised: 12/23/2022] [Accepted: 02/19/2023] [Indexed: 02/23/2023]
Abstract
Lokivetmab (Cytopoint®, Zoetis) is a canine monoclonal antibody that specifically binds and neutralizes interleukin (IL)-31. Lokivetmab is approved for use in dogs for the treatment of atopic dermatitis (AD) and allergic dermatitis. The laboratory safety of lokivetmab was evaluated in 2 studies by adapting the science-based, case-by-case approach used for preclinical and early clinical safety evaluation of human biopharmaceuticals. The main objectives were to demonstrate the safety of lokivetmab in healthy laboratory Beagle dogs by using integrated clinical, morphologic, and functional evaluations. In Study 1, dogs were treated s.c. with saline or lokivetmab at 3.3 mg/kg (1X, label dose) or 10 mg/kg (3X intended dose) for 7 consecutive monthly doses, with terminal pathology and histology assessments. In Study 2, the functional immune response was demonstrated in naïve dogs using the T-cell dependent antibody response (TDAR) test with 2 different dose levels of unadjuvanted keyhole limpet hemocyanin (KLH) as the model immunogen. The primary endpoint was anti-KLH IgG antibody titer, and secondary endpoints were ex vivo IL-2 enzyme-linked immunospot (ELISpot) and peripheral blood mononuclear cell lymphoproliferation assays. Both studies included monitoring general health, periodic veterinary clinical evaluations, serial clinical pathology and toxicokinetics, and monitoring for anti-drug antibodies. In both studies, the health of dogs receiving lokivetmab was similar to controls, with no treatment-related changes uncovered. Extensive pathology evaluations of immune tissues (Study 1) revealed no lokivetmab-related morphologic changes, and in dogs treated at 10 mg/kg lokivetmab, immunization with the model antigen KLH did not impair the functional antibody or T-cell recall responses. There were no immunogenicity-related or hypersensitivity-related responses observed in either study. These studies in healthy laboratory dogs showed that lokivetmab was well-tolerated, did not produce any treatment-related effects, and had no effect on immune system morphology or its functional response. These studies also demonstrated the utility of a science-based case-by-case approach to the safety evaluation of a veterinary biopharmaceutical product.
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Affiliation(s)
| | | | - Vickie L King
- Zoetis Inc, 333 Portage Street, Kalamazoo, MI 49007, USA
| | - Kevin Esch
- Zoetis Inc, 333 Portage Street, Kalamazoo, MI 49007, USA
| | - Sean P Mahabir
- Zoetis Inc, 333 Portage Street, Kalamazoo, MI 49007, USA
| | | | | | - Laurel Sly
- Zoetis Inc, 333 Portage Street, Kalamazoo, MI 49007, USA
| | - Duncan Mwangi
- Zoetis Inc, 333 Portage Street, Kalamazoo, MI 49007, USA
| | - Dennis L Foss
- Zoetis Inc, 333 Portage Street, Kalamazoo, MI 49007, USA
| | - Sharath Rai
- Zoetis Inc, 333 Portage Street, Kalamazoo, MI 49007, USA
| | | | | | - Adam Schoell
- Zoetis Inc, 333 Portage Street, Kalamazoo, MI 49007, USA
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Zulkifli, Jamil KF, Darmawi, Usman S. Is Formulary of Maranta Arundinacea Clarias Gariepinus (F-MaCg) a Potential Immunostimulant? Avicenna J Med Biotechnol 2023; 15:91-99. [PMID: 37034889 PMCID: PMC10073917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 11/30/2022] [Indexed: 11/02/2023] Open
Abstract
Background External factors have the potential to act as immunostimulants in order to influence the body's protection from many foreign antigens. We intended to investigate the ethanol extract Formulary of F-MaCg effect as an immunostimulant. Methods A purely experimental with a completely randomized design was used on twenty-four white male rats. They were divided into four groups:1) G0 [given aquades (5 ml)]; 2) G1 [given F-MaCg-75 mg/gr BW (Body Weight)]; 3) G2 (F-MaCg -150 mg/gr plus Hepatitis B vaccine at the beginning and the end of treatment); and 4) G3 (F-MaCg -300 mg/gr BW plus hepatitis B vaccine at the end of treatment). The rat's spleen lymphocyte blast transformation was evaluated on the 15th and 37th days. Lymphocytes were examined using microtetrazolium assays. Optical Density (OD) was measured using an ELISA reader [493 nμ (nanomicro)]. Observation of lymphocyte viability by a counting chamber using a light microscope and trypan blue 1% before being cultured with Phytohaemoaglutinin. Results Lymphocyte cell viability in the hepatitis B vaccine-induced group on the 15th day showed the highest average value in the G2 (1,484/mcl of blood); on the 37th day, it was in G3 (1,578/mcl of blood). The proliferative activity of spleen lymphocytes indicated by the difference in the OD values of the four treatment groups was 0.467, 0.913, 1.619, and 1.473 nμ, respectively. Histological observations of the spleen showed differences at all given formulary dose concentrations. Conclusion F-MaCg could be an immunostimulant because of its ability to trigger a cellular immune response.
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Affiliation(s)
- Zulkifli
- Faculty of Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Kurnia Fitri Jamil
- Department of Internal Medicine, Faculty of Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Darmawi
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Said Usman
- Department of Public Health, Faculty of Medicine, Universitas Syiah Kuala, Banda Aceh, Indonesia
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7
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Maronpot R, Ramot Y, Nyska A, Sproul C, Moore R, Koyanagi M, Chiba S, Nishino M, Hayashi SM. Chronic toxicity and carcinogenicity study of dietary gardenia blue in Sprague Dawley rats. Food Chem Toxicol 2023; 176:113734. [PMID: 36935076 DOI: 10.1016/j.fct.2023.113734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 03/08/2023] [Accepted: 03/16/2023] [Indexed: 03/19/2023]
Abstract
In this combined chronic toxicity/carcinogenicity study of gardenia blue as a natural food color additive, Sprague Dawley rats were administered 0.5%, 2.5%, or 5.0% gardenia blue via the feed or carrier diet (0.0% gardenia blue) for 12 (chronic toxicity cohort) or 24 (carcinogenicity cohort) months. No abnormal clinical, ophthalmological, neurotoxicity or clinical pathology changes were attributed to treatment, and there was no increase in mortality due to gardenia blue exposure. The only treatment-related change was grossly observed blue discoloration of the stomach, intestines, and mesenteric lymph nodes as well as reversible dark discoloration of the kidneys all without associated histopathology. The no-observed-adverse-effect level (NOAEL) for gardenia blue exposure via the diet for one or two years was determined to be 5.0% (2175.3 mg/kg body weight/day in male rats and 3075.4 mg/kg body weight/day in female rats).
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Affiliation(s)
- Robert Maronpot
- Maronpot Consulting, LLC, 1612 Medfield Road, Raleigh, NC, 27607, USA
| | - Yuval Ramot
- Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel; Department of Dermatology, Hadassah Medical Center, Jerusalem, Israel
| | - Abraham Nyska
- Toxicologic Pathology, Tel Aviv and Tel Aviv University, Israel.
| | - Christopher Sproul
- Integrated Laboratory Systems, LLC, 601 Keystone Park Drive, Morrisville, NC, 27560, USA
| | - Rebecca Moore
- Integrated Laboratory Systems, LLC, 601 Keystone Park Drive, Morrisville, NC, 27560, USA
| | - Mihoko Koyanagi
- Global Scientific and Regulatory Affairs, San-Ei Gen F.F.I., Inc., 1-1-11 Sanwa-cho, Toyonaka, Osaka, 561-8588, Japan
| | - Shuichi Chiba
- Global Scientific and Regulatory Affairs, San-Ei Gen F.F.I., Inc., 1-1-11 Sanwa-cho, Toyonaka, Osaka, 561-8588, Japan
| | - Masayuki Nishino
- Global Scientific and Regulatory Affairs, San-Ei Gen F.F.I., Inc., 1-1-11 Sanwa-cho, Toyonaka, Osaka, 561-8588, Japan
| | - Shim-Mo Hayashi
- National Institute of Health Sciences, Kawasaki, Kanagawa, Japan
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8
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Nguyen C, Jordheim LP. [Evaluation of immunotoxicitiy in biomedical research and development]. Biol Aujourdhui 2023; 216:167-181. [PMID: 36744982 DOI: 10.1051/jbio/2022020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Indexed: 02/07/2023]
Abstract
Immunotoxicology aims at studying toxic effects of any substance on the immune system and its functions. In its various fields of application, this science is dependent on regulatory texts and guidelines. Studies are based on in vitro, ex vivo and in vivo techniques and are observational or functional allowing the identification of a toxic effect and its underlying mechanisms, respectively. Here, we review the various tests to perform in biomedical research and development, with a particular interest for the T-cell Dependent Antibody Response (TDAR) assay. We also briefly discuss the upcoming evolutions in this domain within a more ethically sound framework such as limiting the use of laboratory animals. These evolutions are represented by the development of relevant cell models.
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Affiliation(s)
- Cathy Nguyen
- Univ Lyon, Université Claude Bernard Lyon 1, ISPB, F-69008 Lyon, France
| | - Lars Petter Jordheim
- Univ Lyon, Université Claude Bernard Lyon 1, ISPB, INSERM 1052, CNRS 5286, Centre Léon Bérard, Centre de Recherche en Cancérologie de Lyon, F-69008 Lyon, France
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9
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Li X, Ma M, Zhao B, Li N, Fang L, Wang D, Luan T. Chlorinated Polycyclic Aromatic Hydrocarbons Induce Immunosuppression in THP-1 Macrophages Characterized by Disrupted Amino Acid Metabolism. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:16012-16023. [PMID: 36282008 DOI: 10.1021/acs.est.2c06471] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Frequent chlorinated polycyclic aromatic hydrocarbon (Cl-PAH) occurrence in environmental samples and emerging detection in human serum have warned of their underestimated risks. Studies showed that some Cl-PAHs exhibit dioxin-like properties, implying immunotoxic potential but lacking direct evidence and specific mechanisms. Here, we integrated a high-content screening (HCS) system and high-resolution mass spectrometry to investigate the immune dysfunction and metabolic disruption induced by Cl-PAHs and their parent PAHs (PPAHs) in THP-1 macrophages. Both 9-chloroanthracene and 2,7-dichlorofluorene exerted clear immunosuppression on THP-1 mφs, while their PPAHs exhibited different immune disturbances. Interestingly, Cl-PAH/PPAHs induced complex alterations in the multicytokine/chemokine network, including biphasic alterations with initial inhibition and later enhancement. Furthermore, the protein-protein interaction results revealed that inflammatory cytokines are the core of this complicated network regulation. Connecting immune phenotypes and metabolomics, amino acid metabolism reprogramming was identified as a potential cause of Cl-PAH/PAH-induced immunotoxicity. Phytosphingosine and l-kynurenine were proposed as candidate immunosuppression biomarkers upon Cl-PAH exposure. This article provides direct immunotoxicity evidence of Cl-PAHs without activating AhR for the first time and discusses the contribution of metabolites to Cl-PAH/PPAH-induced immune responses in macrophages, highlighting the potential of developing new methods based on immunometabolism mechanisms for toxic risk evaluation of environmental chemicals.
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Affiliation(s)
- Xinyan Li
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou510006, China
- Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Rongjiang Laboratory), Jieyang515200, China
| | - Mei Ma
- China Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing100049, China
| | - Bilin Zhao
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou510006, China
| | - Na Li
- China Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing100049, China
| | - Ling Fang
- Instrumental Analysis & Research Center, Sun Yat-Sen University, Guangzhou510275, China
| | - Donghong Wang
- China Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing100049, China
| | - Tiangang Luan
- Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou510006, China
- Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Rongjiang Laboratory), Jieyang515200, China
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou510275, China
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10
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Berthing T, Holmfred E, Vidmar J, Hadrup N, Mortensen A, Szarek J, Loeschner K, Vogel U. Comparison of biodistribution of cerium oxide nanoparticles after repeated oral administration by gavage or snack in Sprague Dawley rats. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2022; 95:103939. [PMID: 35908641 DOI: 10.1016/j.etap.2022.103939] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 07/01/2022] [Accepted: 07/26/2022] [Indexed: 06/15/2023]
Abstract
The rate of translocation of ingested nanoparticles (NPs) and how the uptake is affected by a food matrix are key aspects of health risk assessment. In this study, female Sprague Dawley rats (N = 4/group) received 0, 1.4, or 13 mg of cerium oxide (CeO2 NM-212) NPs/rat/day by gavage or in a chocolate spread snack 5 days/week for 1 or 2 weeks followed by 2 weeks of recovery. A dose and time-dependent uptake in the liver and spleen of 0.1-0.3 and 0.004-0.005 parts per million (ng/mg) of the total administered dose was found, respectively. There was no statistically significant difference in cerium concentration in the liver or spleen after gavage compared to snack dosing. Microscopy revealed indications of necrotic changes in the liver and decreased cellularity in white pulp in the spleen. The snack provided precise administration and a more human-relevant exposure of NPs and could improve animal welfare as alternative to gavage.
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Affiliation(s)
- Trine Berthing
- National Research Centre for the Working Environment, DK-2100 Copenhagen, Denmark.
| | - Else Holmfred
- National Research Centre for the Working Environment, DK-2100 Copenhagen, Denmark; National Food Institute, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Janja Vidmar
- National Food Institute, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Niels Hadrup
- National Research Centre for the Working Environment, DK-2100 Copenhagen, Denmark
| | - Alicja Mortensen
- National Research Centre for the Working Environment, DK-2100 Copenhagen, Denmark
| | - Józef Szarek
- Department of Pathophysiology, Forensic Veterinary Medicine and Administration, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn, 10-717 Olsztyn, Poland
| | - Katrin Loeschner
- National Food Institute, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Ulla Vogel
- National Research Centre for the Working Environment, DK-2100 Copenhagen, Denmark; National Food Institute, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
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11
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Germolec DR, Lebrec H, Anderson SE, Burleson GR, Cardenas A, Corsini E, Elmore SE, Kaplan BL, Lawrence BP, Lehmann GM, Maier CC, McHale CM, Myers LP, Pallardy M, Rooney AA, Zeise L, Zhang L, Smith MT. Consensus on the Key Characteristics of Immunotoxic Agents as a Basis for Hazard Identification. ENVIRONMENTAL HEALTH PERSPECTIVES 2022; 130:105001. [PMID: 36201310 PMCID: PMC9536493 DOI: 10.1289/ehp10800] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 08/09/2022] [Accepted: 08/26/2022] [Indexed: 05/04/2023]
Abstract
BACKGROUND Key characteristics (KCs), properties of agents or exposures that confer potential hazard, have been developed for carcinogens and other toxicant classes. KCs have been used in the systematic assessment of hazards and to identify assay and data gaps that limit screening and risk assessment. Many of the mechanisms through which pharmaceuticals and occupational or environmental agents modulate immune function are well recognized. Thus KCs could be identified for immunoactive substances and applied to improve hazard assessment of immunodulatory agents. OBJECTIVES The goal was to generate a consensus-based synthesis of scientific evidence describing the KCs of agents known to cause immunotoxicity and potential applications, such as assays to measure the KCs. METHODS A committee of 18 experts with diverse specialties identified 10 KCs of immunotoxic agents, namely, 1) covalently binds to proteins to form novel antigens, 2) affects antigen processing and presentation, 3) alters immune cell signaling, 4) alters immune cell proliferation, 5) modifies cellular differentiation, 6) alters immune cell-cell communication, 7) alters effector function of specific cell types, 8) alters immune cell trafficking, 9) alters cell death processes, and 10) breaks down immune tolerance. The group considered how these KCs could influence immune processes and contribute to hypersensitivity, inappropriate enhancement, immunosuppression, or autoimmunity. DISCUSSION KCs can be used to improve efforts to identify agents that cause immunotoxicity via one or more mechanisms, to develop better testing and biomarker approaches to evaluate immunotoxicity, and to enable a more comprehensive and mechanistic understanding of adverse effects of exposures on the immune system. https://doi.org/10.1289/EHP10800.
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Affiliation(s)
- Dori R. Germolec
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA
| | - Herve Lebrec
- Translational Safety & Bioanalytical Sciences, Amgen Research, South San Francisco, California, USA
| | - Stacey E. Anderson
- Allergy and Clinical Immunology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, West Virginia, USA
| | - Gary R. Burleson
- Burleson Research Technologies, Inc., Morrisville, North Carolina, USA
| | - Andres Cardenas
- Division of Environmental Health Sciences, School of Public Health, University of California, Berkeley, Berkeley, California, USA
| | - Emanuela Corsini
- Laboratory of Toxicology, Department of Pharmacological and Biomolecular Sciences, Università degli Studi di Milano, Milan, Italy
| | - Sarah E. Elmore
- Office of Environmental Health Hazard Assessment, California Environmental Protection Agency, Oakland, California, USA
| | - Barbara L.F. Kaplan
- Department of Comparative Biomedical Sciences, Center for Environmental Health Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, USA
| | - B. Paige Lawrence
- Department of Environmental Medicine, University of Rochester School of Medicine & Dentistry, Rochester, New York, USA
- Department of Microbiology & Immunology, University of Rochester School of Medicine & Dentistry, Rochester, New York, USA
| | - Geniece M. Lehmann
- Center for Public Health and Environmental Assessment, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina, USA
| | - Curtis C. Maier
- In Vitro In Vivo Translation, Research and Development, GlaxoSmithKline, Collegeville, Pennsylvania, USA
| | - Cliona M. McHale
- Division of Environmental Health Sciences, School of Public Health, University of California, Berkeley, Berkeley, California, USA
| | - L. Peyton Myers
- Division of Pharm/Tox, Office of Infectious Diseases, Office of New Drugs, Center for Drug Evaluation and Research, U.S. Federal Food and Drug Administration, Silver Spring, Maryland, USA
| | - Marc Pallardy
- Inserm, Inflammation microbiome immunosurveillance, Université Paris-Saclay, Châtenay-Malabry, France
| | - Andrew A. Rooney
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA
| | - Lauren Zeise
- Office of Environmental Health Hazard Assessment, California Environmental Protection Agency, Oakland, California, USA
| | - Luoping Zhang
- Division of Environmental Health Sciences, School of Public Health, University of California, Berkeley, Berkeley, California, USA
| | - Martyn T. Smith
- Division of Environmental Health Sciences, School of Public Health, University of California, Berkeley, Berkeley, California, USA
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12
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O'Brien MT, Schuh JCL, Wancket LM, Cramer SD, Funk KA, Jackson ND, Kannan K, Keane K, Nyska A, Rousselle SD, Schucker A, Thomas VS, Tunev S. Scientific and Regulatory Policy Committee Points to Consider for Medical Device Implant Site Evaluation in Nonclinical Studies. Toxicol Pathol 2022; 50:512-530. [PMID: 35762822 DOI: 10.1177/01926233221103202] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Nonclinical implantation studies are a common and often critical step for medical device safety assessment in the bench-to-market pathway. Nonclinical implanted medical devices or drug-device combination products require complex macroscopic and microscopic pathology evaluations due to the physical presence of the device itself and unique tissue responses to device materials. The Medical Device Implant Site Evaluation working group of the Society of Toxicologic Pathology's (STP) Scientific and Regulatory Policy Committee (SRPC) was tasked with reviewing scientific, technical, and regulatory considerations for these studies. Implant site evaluations require highly specialized methods and analytical schemes that should be designed on a case-by-case basis to address specific study objectives. Existing STP best practice recommendations can serve as a framework when performing nonclinical studies under Good Laboratory Practices and help mitigate limitations in standards and guidances for implant evaluations (e.g., those from the International Organization for Standardization [ISO], ASTM International). This article integrates standards referenced by sponsors and regulatory bodies with practical pathology evaluation methods for implantable medical devices and combination products. The goal is to ensure the maximum accuracy and scientific relevance of pathology data acquired during a medical device or combination drug-device implantation study.
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Affiliation(s)
| | | | - Lyn M Wancket
- Charles River Laboratories, Durham, North Carolina, USA
| | | | - Kathleen A Funk
- Experimental Pathology Laboratories, Sterling, Virginia, USA
| | | | - Kamala Kannan
- Adgyl Lifesciences Private Limited, Bangalore, India
| | - Kevin Keane
- Blueprint Medicines, Cambridge, Massachusetts, USA
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13
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Rothschild BM, Jellema L, Lambert W. Demographics and significance of porotic hyperostosis as assessed by surface microscopy. Anat Rec (Hoboken) 2022; 305:2158-2165. [PMID: 35122474 DOI: 10.1002/ar.24881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 01/12/2021] [Accepted: 02/11/2021] [Indexed: 11/11/2022]
Abstract
BACKGROUND Examination of parietal surface anatomy has been limited because standard techniques have insufficient resolution to identify and characterize the structures of interest. Perspectives derived thereof have not clarified their nature. Surface microscopy is pursued as a non-destructive technique to assess the character and implications of porotic pores (referred to as porotic hyperostosis), which have been subject of much speculation. METHODS The external surface of skulls, selected on the basis of age and gender, from the Hamann-Todd human collection are examined by epi-illumination microscopy for surface pores and to assess correlation with age, ethnicity, gender, anemia, infection, cancer, hypertrophic bone disorders, renal disease and fractures. RESULTS Pore-like surface defects are present in 2.7-5% of individuals in the third-fifth decades of life; 7%, in the sixth-eighth; and 25%, in the ninth-11th, but absent in the second decade of life. They are gender and birthdate-independent, but slightly more common in African Americans. Fractures are more common among individuals with parietal pores, while tuberculosis, cancer and hypertrophic bone diseases and anemia are less common. DISCUSSION This is the first study to actually examine the prevalence of parietal pores as a function of known age, race and sex and provides a baseline for comparison with populations in which those variables are not clearly identifiable. While some porotic pores may be related to marrow hyperplasia, trans-cortical circulation may explain the majority. This article is protected by copyright. All rights reserved.
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Affiliation(s)
| | - Lyman Jellema
- Cleveland Museum of Natural History, Wade Circle, Cleveland, OH, USA
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14
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Cooper TK, Meyerholz DK, Beck AP, Delaney MA, Piersigilli A, Southard TL, Brayton CF. Research-Relevant Conditions and Pathology of Laboratory Mice, Rats, Gerbils, Guinea Pigs, Hamsters, Naked Mole Rats, and Rabbits. ILAR J 2022; 62:77-132. [PMID: 34979559 DOI: 10.1093/ilar/ilab022] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 05/12/2021] [Indexed: 12/31/2022] Open
Abstract
Animals are valuable resources in biomedical research in investigations of biological processes, disease pathogenesis, therapeutic interventions, safety, toxicity, and carcinogenicity. Interpretation of data from animals requires knowledge not only of the processes or diseases (pathophysiology) under study but also recognition of spontaneous conditions and background lesions (pathology) that can influence or confound the study results. Species, strain/stock, sex, age, anatomy, physiology, spontaneous diseases (noninfectious and infectious), and neoplasia impact experimental results and interpretation as well as animal welfare. This review and the references selected aim to provide a pathology resource for researchers, pathologists, and veterinary personnel who strive to achieve research rigor and validity and must understand the spectrum of "normal" and expected conditions to accurately identify research-relevant experimental phenotypes as well as unusual illness, pathology, or other conditions that can compromise studies involving laboratory mice, rats, gerbils, guinea pigs, hamsters, naked mole rats, and rabbits.
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Affiliation(s)
- Timothy K Cooper
- Department of Comparative Medicine, Penn State Hershey Medical Center, Hershey, PA, USA
| | - David K Meyerholz
- Department of Pathology, University of Iowa Roy J. and Lucille A. Carver College of Medicine, Iowa City, Iowa, USA
| | - Amanda P Beck
- Department of Pathology, Yeshiva University Albert Einstein College of Medicine, Bronx, New York, USA
| | - Martha A Delaney
- Zoological Pathology Program, University of Illinois at Urbana-Champaign College of Veterinary Medicine, Urbana-Champaign, Illinois, USA
| | - Alessandra Piersigilli
- Laboratory of Comparative Pathology and the Genetically Modified Animal Phenotyping Service, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Teresa L Southard
- Department of Biomedical Sciences, Cornell University College of Veterinary Medicine, Ithaca, New York, USA
| | - Cory F Brayton
- Department of Molecular and Comparative Pathobiology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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15
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Histopathology of head kidney tissues in challenged rohu, Labeo rohita Hamilton after vaccinating with Aeromonas hydrophila antigens. FISH AND SHELLFISH IMMUNOLOGY REPORTS 2021; 2:100025. [DOI: 10.1016/j.fsirep.2021.100025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 09/02/2021] [Accepted: 09/02/2021] [Indexed: 11/21/2022] Open
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16
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Musser ML, Viall AK, Phillips RL, Fasina O, Johannes CM. Prostaglandin EP4 receptor mRNA expression in canine lymphoma. Vet Comp Oncol 2021; 20:127-133. [PMID: 34250711 DOI: 10.1111/vco.12753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 06/16/2021] [Accepted: 07/08/2021] [Indexed: 11/28/2022]
Abstract
Canine lymphoma (LSA) is a diverse, aggressive malignancy initiated by a variety of factors. Understanding those factors could help identify potential treatment options. Chronic inflammation drives lymphoma in human medicine and is suspected to play a role in veterinary medicine. The exact mechanisms, however, have not been elucidated. Upregulation of the cyclooxygenase enzymes, and subsequently prostaglandins, potentially play a stimulatory role. Prostaglandins work through one of four EP receptors (EP1-EP4) and the effects mediated through EP4R specifically are thought to be the primary drivers of cancer development. In human T-cell LSA, overexpression of EP4R has been found and appears to protect LSA cells from apoptosis. The role of EP4R in human B-cell LSA is more nuanced. This study aims to evaluate the mRNA expression of the EP4R gene (ptger4) in canine B-cell and T-cell LSA. Archived canine lymph nodes with histologically confirmed B-cell and T-cell LSA, and reactive lymph nodes, were evaluated for EP4R mRNA expression using a novel RNA in situ hybridization technique (RNAscope). Quantification of RNAscope signals was completed with an advanced digital pathology image analysis system (HALO). Results were reported as copy number, H-score, and percent tumour cell expression of EP4R mRNA. All reactive, B-cell LSA, and T-cell LSA lymph nodes expressed EP4R mRNA. The mRNA copy number, H-score, and percent tumour cell expression of EP4R were higher in B-cell (p < .003) and T-cell (p < .001) LSA samples compared to reactive lymph node samples. There were no differences between B-cell LSA and T-cell LSA.
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Affiliation(s)
- Margaret L Musser
- Department of Veterinary Clinical Sciences, Iowa State University, College of Veterinary Medicine, Ames, Iowa, USA
| | - Austin K Viall
- Department of Veterinary Pathology, Iowa State University, College of Veterinary Medicine, Ames, Iowa, USA
| | - Rachel L Phillips
- Department of Veterinary Pathology, Iowa State University, College of Veterinary Medicine, Ames, Iowa, USA
| | - Olufemi Fasina
- Department of Veterinary Pathology, Iowa State University, College of Veterinary Medicine, Ames, Iowa, USA
| | - Chad M Johannes
- Department of Veterinary Clinical Sciences, Iowa State University, College of Veterinary Medicine, Ames, Iowa, USA
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17
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Lin Z, Huang Y, Jiang H, Zhang D, Yang Y, Geng X, Li B. Functional differences and similarities in activated peripheral blood mononuclear cells by lipopolysaccharide or phytohemagglutinin stimulation between human and cynomolgus monkeys. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:257. [PMID: 33708884 PMCID: PMC7940909 DOI: 10.21037/atm-20-4548] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Background The monkey is a primary species used in toxicological research. However, the failures of preclinical studies to predict a life-threatening “cytokine storm”, which, for instance, rapidly occurred in six healthy volunteers with the CD28 superagonist monoclonal antibody (mAb) TGN1412 in the first-in-human phase I clinical trial, have emphasized a need to clarify the differences between human and monkey immune systems. Methods In the present study, we analyzed and compared the lymphocyte proliferation, cytokine secretion, and gene expression profiles after phytohemagglutinin (PHA) and lipopolysaccharide (LPS) stimulation of peripheral blood mononuclear cells (PBMCs) from three healthy humans and cynomolgus monkeys (Macaca fascicularis). Results The results derived from comparison with the corresponding control groups showed that PHA in humans induced a stronger proliferation and wider range of cytokine secretion, along with a greater number of differently expressed genes (DEGs), than when PHA was applied in cynomolgus monkeys. The significant upregulation of genes involved in the mitotic cell cycle, including cyclin B2, TOP2A, TYMS, and CEP55, was observed in human PBMCs with PHA stimulation, while only infrequent or slight upregulation occurred in cynomolgus monkey PBMCs, which may be one of the reasons for a stronger response to PHA in humans. In contrast to PHA, LPS in both species induced a similar proliferation ratio, cytokine profile, and DEG count, suggesting that human and cynomolgus monkeys have a similar response intensity for innate immune responses. Furthermore, 38 and 20 overlapped genes under PHA and LPS stimulation, respectively, were found in both species. These overlapped DEGs were associated with the same biological functions, including DNA replication, mitosis, immune response, chemotaxis, and inflammatory response. Thus, these results might reflect the highly conserved signatures of immune responses to PHA/LPS stimulation across the primates. Moreover, there were some differences in antigen processing and presentation, and the interferon gamma (INF-γ)–mediated signaling pathway in these species detected by gene expression profile study. Conclusions In conclusion, this is the first study to compare data on the responses of PBMCs to PHA and LPS in humans versus cynomolgus monkeys, and these findings may provide crucial insights into translating non-human primate (NHP) studies into human trials.
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Affiliation(s)
- Zhi Lin
- National Institute for Food and Drug Control, National Center for Safety Evaluation of Drugs, Beijing Key Lab for Preclinical Safety Evaluation of Drugs, Beijing, China
| | - Ying Huang
- National Institute for Food and Drug Control, National Center for Safety Evaluation of Drugs, Beijing Key Lab for Preclinical Safety Evaluation of Drugs, Beijing, China
| | - Hua Jiang
- National Institute for Food and Drug Control, National Center for Safety Evaluation of Drugs, Beijing Key Lab for Preclinical Safety Evaluation of Drugs, Beijing, China
| | - Di Zhang
- National Institute for Food and Drug Control, National Center for Safety Evaluation of Drugs, Beijing Key Lab for Preclinical Safety Evaluation of Drugs, Beijing, China
| | - Yanwei Yang
- National Institute for Food and Drug Control, National Center for Safety Evaluation of Drugs, Beijing Key Lab for Preclinical Safety Evaluation of Drugs, Beijing, China
| | - Xingchao Geng
- National Institute for Food and Drug Control, National Center for Safety Evaluation of Drugs, Beijing Key Lab for Preclinical Safety Evaluation of Drugs, Beijing, China
| | - Bo Li
- National Institute for Food and Drug Control, National Center for Safety Evaluation of Drugs, Beijing Key Lab for Preclinical Safety Evaluation of Drugs, Beijing, China
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18
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Tibaldi E, Gnudi F, Panzacchi S, Mandrioli D, Vornoli A, Manservigi M, Sgargi D, Falcioni L, Bua L, Belpoggi F. Identification of aspartame-induced haematopoietic and lymphoid tumours in rats after lifetime treatment. Acta Histochem 2020; 122:151548. [PMID: 32622430 DOI: 10.1016/j.acthis.2020.151548] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 03/02/2020] [Accepted: 03/20/2020] [Indexed: 12/22/2022]
Abstract
Lymphomas and leukaemias involving the lung have in some cases been hard to distinguish from respiratory tract infection in Sprague-Dawley (SD) rats from long-term bioassays. In order to differentiate between tumours and immune cell infiltrates, updated pathological criteria and nomenclature were used and immunohistochemistry (IHC) was applied to haematopoietic and lymphoid tissue tumours (HLTs) in the original prenatal long-term Aspartame (APM) study performed by the Ramazzini Institute (RI). All 78 cases of HLTs from treated and control groups were re-examined based on light microscopic morphological characteristics and subjected to a panel of IHC markers including Ki67, CD3, PAX5, CD20, CD68, TdT, CD45, CD14 and CD33. The analysis confirmed the diagnoses of HLTs in 72 cases, identified 3 cases of preneoplastic lesions (lymphoid hyperplasia), and categorized 3 cases as inflammatory lesions. A statistically significant increase in total HLTs (p = 0.006), total lymphomas (p = 0.032) and total leukaemias (p = 0.031) in treated female rats was confirmed (high dose vs control), and a statistically significant linear trend for each HLT type was also observed. After the HLT cases re-evaluation, the results obtained are consistent with those reported in the previous RI publication and reinforce the hypothesis that APM has a leukaemogenic and lymphomatogenic effect.
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19
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Willard-Mack CL, Elmore SA, Hall WC, Harleman J, Kuper CF, Losco P, Rehg JE, Rühl-Fehlert C, Ward JM, Weinstock D, Bradley A, Hosokawa S, Pearse G, Mahler BW, Herbert RA, Keenan CM. Nonproliferative and Proliferative Lesions of the Rat and Mouse Hematolymphoid System. Toxicol Pathol 2020; 47:665-783. [PMID: 31526133 DOI: 10.1177/0192623319867053] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The INHAND Project (International Harmonization of Nomenclature and Diagnostic Criteria for Lesions in Rats and Mice) is a joint initiative of the Societies of Toxicologic Pathology from Europe (ESTP), Great Britain (BSTP), Japan (JSTP), and North America (STP) to develop an internationally accepted nomenclature for proliferative and nonproliferative changes in rats and mice. The purpose of this publication is to provide a standardized nomenclature for classifying changes observed in the hematolymphoid organs, including the bone marrow, thymus, spleen, lymph nodes, mucosa-associated lymphoid tissues, and other lymphoid tissues (serosa-associated lymphoid clusters and tertiary lymphoid structures) with color photomicrographs illustrating examples of the lesions. Sources of material included histopathology databases from government, academia, and industrial laboratories throughout the world. Content includes spontaneous lesions as well as lesions induced by exposure to test materials. The nomenclature for these organs is divided into 3 terminologies: descriptive, conventional, and enhanced. Three terms are listed for each diagnosis. The rationale for this approach and guidance for its application to toxicologic pathology are described in detail below.
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Affiliation(s)
| | - Susan A Elmore
- Thymus subgroup lead.,National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | | | - Johannes Harleman
- Lymph node subgroup lead.,Neoplasm subgroup leads.,Independent Consultant, Darmstadt, Germany
| | - C Frieke Kuper
- Associated lymphoid organs subgroup lead.,Independent Consultant, Utrecht, the Netherlands
| | - Patricia Losco
- General hematolymphoid subgroup lead.,Independent Consultant, West Chester, PA, USA
| | - Jerold E Rehg
- Spleen subgroup leads.,Neoplasm subgroup leads.,Saint Jude Children's Research Hospital, Memphis, TN, USA
| | | | - Jerrold M Ward
- Spleen subgroup leads.,Neoplasm subgroup leads.,Global VetPathology, Montgomery Village, MD, USA
| | | | - Alys Bradley
- Charles River Laboratories, Tranent, Scotland, United Kingdom
| | - Satoru Hosokawa
- Eisai Co, Ltd, Drug Safety Research Laboratories, Ibaraki, Japan
| | | | - Beth W Mahler
- Experimental Pathology Laboratories, Research Triangle Park, NC, USA
| | - Ronald A Herbert
- National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
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20
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Tochitani T, Yamashita A, Matsumoto I, Kouchi M, Fujii Y, Miyawaki I. Dose- and time-dependent changes in blood and adrenal levels of multiple steroids in rats after administration of ketoconazole with or without ACTH. J Toxicol Sci 2019; 44:601-610. [PMID: 31474741 DOI: 10.2131/jts.44.601] [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: 11/02/2022]
Abstract
To verify simultaneous measurement of blood levels of adrenal steroids as a tool to evaluate drug effects on adrenal steroidogenesis, dose- and time-dependent changes in blood levels of corticosterone and its precursors (pregnenolone, progesterone and deoxycorticosterone), as well as their relationship with the pathological changes in the adrenal gland, were examined in rats dosed with ketoconazole (KET). Also examined were whether effects on adrenal steroidogenesis that were not obvious in the blood steroid levels after sole administration of KET could be revealed by post-administration of ACTH, and the correlation between the blood and adrenal steroid levels. Male rats were dosed with 15, 50, or 150 mg/kg of KET for 1 or 7 days with or without ACTH, and the blood and adrenal concentrations of the steroids were measured. KET increased the blood deoxycorticosterone level even at a dose level and time point at which histopathological changes were not obvious. KET-induced changes in blood levels of other steroids were revealed by ACTH, and the blood and adrenal levels were generally correlated especially after ACTH post-administration. Thus, blood levels of adrenal steroids, including precursors, can be a sensitive and early marker of drug effects on the adrenal steroidogenesis that reflect adrenal levels of steroids. The usefulness of the multiple steroid measurement as a method for mechanism investigation of drug effects on the adrenal gland can be further enhanced by ACTH.
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Affiliation(s)
| | | | - Izumi Matsumoto
- Preclinical Research Unit, Sumitomo Dainippon Pharma Co., Ltd
| | - Mami Kouchi
- Preclinical Research Unit, Sumitomo Dainippon Pharma Co., Ltd
| | - Yuta Fujii
- Preclinical Research Unit, Sumitomo Dainippon Pharma Co., Ltd
| | - Izuru Miyawaki
- Preclinical Research Unit, Sumitomo Dainippon Pharma Co., Ltd
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21
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Parker GA, Li N, Takayama K, Booth C, Tudor GL, Farese AM, MacVittie TJ. Histopathological Features of the Development of Intestine and Mesenteric Lymph Node Injury in a Nonhuman Primate Model of Partial-body Irradiation with Minimal Bone Marrow Sparing. HEALTH PHYSICS 2019; 116:426-446. [PMID: 30624355 PMCID: PMC6362996 DOI: 10.1097/hp.0000000000000932] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Male rhesus macaques were subjected to partial-body irradiation at 10, 11, or 12 Gy with 5% bone marrow protection. Animals were euthanized when dictated by prospectively determined clinical parameters or at approximately 180 d following irradiation. Histological sections of jejunum, colon, and mesenteric lymph node were stained with hematoxylin and eosin as well as a battery of histochemical and immunohistochemical stains. The immediate postirradiation histopathological alterations in the jejunum and colon were based primarily on injury to rapidly proliferating crypt epithelial cells, though there was evidence of additional radiation-induced fibrogenic responses. There was substantial resolution of the radiation-related mucosal injury through the observation period, but microscopically visible defects in mucosal structure persisted to the end of the observation period. In the later stages of the observation period, the jejunum and colon had overt fibrosis that was most commonly located in the submucosa and serosa, with less microscopically discernible involvement of the mucosa. Mesenteric lymph nodes had an immediate postirradiation reduction in cellularity due to the known effects of irradiation on lymphoid cell populations. In later stages of the observation period the lymph nodes also developed fibrotic changes, possibly related to transmigration of immunomodulatory cells and/or signaling molecules from the radiation-damaged intestine.
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Affiliation(s)
- George A. Parker
- Charles River Laboratories/Pathology Associates, Durham, NC, USA
| | - Na Li
- Charles River Laboratories/Pathology Associates, Durham, NC, USA
| | - Kyle Takayama
- Charles River Laboratories/Pathology Associates, Durham, NC, USA
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22
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Affiliation(s)
- Piper M Treuting
- 1 Department of Comparative Medicine, University of Washington, Seattle, WA, USA
| | - Kelli L Boyd
- 2 Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
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23
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Everds NE, Reindel J, Werner J, Craven WA. Variability of Spleen and Mesenteric Lymph Node in Control Cynomolgus Monkeys ( Macaca fascicularis) from Nonclinical Safety Studies: A Retrospective Assessment. Toxicol Pathol 2018; 47:53-72. [PMID: 30563426 DOI: 10.1177/0192623318809073] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We assessed the variability of spleen and mesenteric lymph node (MLN) microscopic observations and the correlations of these observations with other study data from 478 control cynomolgus monkeys from 53 routine nonclinical safety studies. Spleen weight parameters (absolute and relative to body or brain weights) were highly variable both within a control group on an individual study (up to 5.11-fold) and among animals with the same light microscopic observation. Grades for microscopic observations were also highly variable. The most frequent microscopic observations for spleen were changes in the size and number of germinal centers (58%), acidophilic (hyaline) material in lymphoid follicles (52%), and compound lymphoid follicles (20%). The most frequent microscopic observations in the MLN were eosinophil infiltrates (90%), changes in size and number of germinal centers (42%), and brown pigment (21%). The only meaningful relationships ( r2 > 0.3) were positive correlations between reticuloendothelial hyperplasia and malarial pigment in the spleen and between each of these observations and spleen weight parameters. We conclude that determination of test article-related effects on the immune system in routine monkey toxicology studies requires careful consideration and a weight-of-evidence approach due to the low numbers of animals/group, the inherent variability in spleen and MLN parameters, and the infrequent correlation among immune system-related end points.
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Affiliation(s)
- Nancy E Everds
- 1 Amgen Inc., South San Francisco, California, USA.,2 Seattle Genetics, Bothell, Washington, USA
| | - James Reindel
- 3 Amgen, Inc., Seattle, Washington, USA.,4 MPI Research, Mattawan, Michigan, USA
| | | | - W A Craven
- 1 Amgen Inc., South San Francisco, California, USA
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24
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He D, Zhang J, Wu W, Yi N, He W, Lu P, Li B, Yang N, Wang D, Xue Z, Zhang P, Fan G, Zhu X. A novel immunodeficient rat model supports human lung cancer xenografts. FASEB J 2018; 33:140-150. [PMID: 29944447 DOI: 10.1096/fj.201800102rr] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Patient-derived xenograft (PDX) animal models allow the exogenous growth of human tumors, offering an irreplaceable preclinical tool for oncology research. Mice are the most commonly used host for human PDX models, however their small body size limits the xenograft growth, sample collection, and drug evaluation. Therefore, we sought to develop a novel rat model that could overcome many of these limitations. We knocked out Rag1, Rag2, and Il2rg in Sprague Dawley (SD) rats by clustered regularly interspaced short palindromic repeats (CRISPR)-CRISPR-associated protein 9 technology. The development of lymphoid organs is significantly impaired in Rag1-/-Rag2-/-Il2rg-/Y (designated as SD-RG) rats. Consequently, SD-RG rats are severely immunodeficient with an absence of mature T, B, and NK cells in the immune system. After subcutaneous injection of tumor cell lines of different origin, such as NCI-H460, U-87MG, and MDA-MB-231, the tumors grow significantly faster and larger in SD-RG rats than in nonobese diabetic- Cg-Prkdcscid Il2rgtm1Wjl/SzJ mice. Most important of all, we successfully established a PDX model of lung squamous cell carcinoma in which the grafts recapitulate the histopathologic features of the primary tumor for several passages. In conclusion, the severely immunodeficient SD-RG rats support fast growth of PDX compared with mice, thus holding great potential to serve as a new model for oncology research.-He, D., Zhang, J., Wu, W., Yi, N., He, W., Lu, P., Li, B., Yang, N., Wang, D., Xue, Z., Zhang, P., Fan, G., Zhu, X. A novel immunodeficient rat model supports human lung cancer xenografts.
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Affiliation(s)
- Di He
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Junhui Zhang
- Department of Regenerative Medicine, Translational Center for Stem Cell Research, Tongji Hospital, Tongji University Suzhou Institute, Tongji University School of Medicine, Shanghai, China
| | - Wanwan Wu
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Ning Yi
- Department of Regenerative Medicine, Translational Center for Stem Cell Research, Tongji Hospital, Tongji University Suzhou Institute, Tongji University School of Medicine, Shanghai, China
| | - Wen He
- Department of Regenerative Medicine, Translational Center for Stem Cell Research, Tongji Hospital, Tongji University Suzhou Institute, Tongji University School of Medicine, Shanghai, China
| | - Ping Lu
- Department of Regenerative Medicine, Translational Center for Stem Cell Research, Tongji Hospital, Tongji University Suzhou Institute, Tongji University School of Medicine, Shanghai, China
| | - Bin Li
- Alphacait AL Biotech Company, Hangzhou, China
| | - Nan Yang
- PharmaLegacy Laboratories Company, Shanghai, China; and
| | - Di Wang
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Zhigang Xue
- Department of Regenerative Medicine, Translational Center for Stem Cell Research, Tongji Hospital, Tongji University Suzhou Institute, Tongji University School of Medicine, Shanghai, China
| | - Peng Zhang
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Guoping Fan
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, China.,Department of Human Genetics, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, USA
| | - Xianmin Zhu
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, School of Life Sciences and Technology, Tongji University, Shanghai, China
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25
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Garofalo M, Saari H, Somersalo P, Crescenti D, Kuryk L, Aksela L, Capasso C, Madetoja M, Koskinen K, Oksanen T, Mäkitie A, Jalasvuori M, Cerullo V, Ciana P, Yliperttula M. Antitumor effect of oncolytic virus and paclitaxel encapsulated in extracellular vesicles for lung cancer treatment. J Control Release 2018; 283:223-234. [PMID: 29864473 DOI: 10.1016/j.jconrel.2018.05.015] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 05/10/2018] [Accepted: 05/14/2018] [Indexed: 01/08/2023]
Abstract
Standard of care for cancer is commonly a combination of surgery with radiotherapy or chemoradiotherapy. However, in some advanced cancer patients this approach might still remaininefficient and may cause many side effects, including severe complications and even death. Oncolytic viruses exhibit different anti-cancer mechanisms compared with conventional therapies, allowing the possibility for improved effect in cancer therapy. Chemotherapeutics combined with oncolytic viruses exhibit stronger cytotoxic responses and oncolysis. Here, we have investigated the systemic delivery of the oncolytic adenovirus and paclitaxel encapsulated in extracellular vesicles (EV) formulation that, in vitro, significantly increased the transduction ratio and the infectious titer when compared with the virus and paclitaxel alone. We demonstrated that the obtained EV formulation reduced the in vivo tumor growth in animal xenograft model of human lung cancer. Indeed, we found that combined treatment of oncolytic adenovirus and paclitaxel encapsulated in EV has enhanced anticancer effects both in vitro and in vivo in lung cancer models. Transcriptomic comparison carried out on the explanted xenografts from the different treatment groups revealed that only 5.3% of the differentially expressed genes were overlapping indicating that a de novo genetic program is triggered by the presence of the encapsulated paclitaxel: this novel genetic program might be responsible of the observed enhanced antitumor effect. Our work provides a promising approach combining anticancer drugs and viral therapies by intravenous EV delivery as a strategy for the lung cancer treatment.
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Affiliation(s)
- M Garofalo
- Division of Pharmaceutical Biosciences and Centre for Drug Research, University of Helsinki, Viikinkaari 5, Helsinki 00790, Finland; Department of Oncology and Hemato-Oncology, Center of Excellence on Neurodegenerative Diseases, University of Milan, Via Balzaretti 9, Milan 20133, Italy.
| | - H Saari
- Division of Pharmaceutical Biosciences and Centre for Drug Research, University of Helsinki, Viikinkaari 5, Helsinki 00790, Finland
| | - P Somersalo
- Division of Pharmaceutical Biosciences and Centre for Drug Research, University of Helsinki, Viikinkaari 5, Helsinki 00790, Finland; Department of Oncology and Hemato-Oncology, Center of Excellence on Neurodegenerative Diseases, University of Milan, Via Balzaretti 9, Milan 20133, Italy
| | - D Crescenti
- Department of Oncology and Hemato-Oncology, Center of Excellence on Neurodegenerative Diseases, University of Milan, Via Balzaretti 9, Milan 20133, Italy
| | - L Kuryk
- Division of Pharmaceutical Biosciences and Centre for Drug Research, University of Helsinki, Viikinkaari 5, Helsinki 00790, Finland; National Institute of Public Health - National Institute of Hygiene, Department of Virology, 24 Chocimska str, 00-791 Warsaw, Poland; Targovax Oy, R&D, Clinical Science, R&D, Saukonpaadenranta 2, 00180 Helsinki, Finland
| | - L Aksela
- Division of Pharmaceutical Biosciences and Centre for Drug Research, University of Helsinki, Viikinkaari 5, Helsinki 00790, Finland
| | - C Capasso
- Laboratory of ImmunoViroTherapy, Drug Research Program, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5, Helsinki 00790, Finland
| | - M Madetoja
- Made Consulting, Tykistökatu 4 B, FI-20520 Turku, Finland
| | - K Koskinen
- Biological and Environmental Science, Nanoscience Center, University of Jyväskylä, Survontie 9C, 40500, Finland
| | - T Oksanen
- Division of Pharmaceutical Biosciences and Centre for Drug Research, University of Helsinki, Viikinkaari 5, Helsinki 00790, Finland
| | - A Mäkitie
- Department of Otorhinolaryngology - Head and Neck Surgery, Helsinki University Hospital and University of Helsinki, P.O.Box 263, FI_00029 HUS, Helsinki, Finland
| | - M Jalasvuori
- Division of Pharmaceutical Biosciences and Centre for Drug Research, University of Helsinki, Viikinkaari 5, Helsinki 00790, Finland; Biological and Environmental Science, Nanoscience Center, University of Jyväskylä, Survontie 9C, 40500, Finland
| | - V Cerullo
- Laboratory of ImmunoViroTherapy, Drug Research Program, Faculty of Pharmacy, University of Helsinki, Viikinkaari 5, Helsinki 00790, Finland
| | - P Ciana
- Department of Oncology and Hemato-Oncology, Center of Excellence on Neurodegenerative Diseases, University of Milan, Via Balzaretti 9, Milan 20133, Italy
| | - M Yliperttula
- Division of Pharmaceutical Biosciences and Centre for Drug Research, University of Helsinki, Viikinkaari 5, Helsinki 00790, Finland.
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26
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Apawu AK, Curley SM, Dixon AR, Hali M, Sinan M, Braun RD, Castracane J, Cacace AT, Bergkvist M, Holt AG. MRI compatible MS2 nanoparticles designed to cross the blood-brain-barrier: providing a path towards tinnitus treatment. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2018; 14:1999-2008. [PMID: 29665440 DOI: 10.1016/j.nano.2018.04.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 03/17/2018] [Accepted: 04/06/2018] [Indexed: 10/17/2022]
Abstract
Fundamental challenges of targeting specific brain regions for treatment using pharmacotherapeutic nanoparticle (NP) carriers include circumventing the blood-brain-barrier (BBB) and tracking delivery. Angiopep-2 (AP2) has been shown to facilitate the transport of large macromolecules and synthetic nanoparticles across the BBB. Thus, conjugation of AP2 to an MS2 bacteriophage based NP should also permit transport across the BBB. We have fabricated and tested a novel MS2 capsid-based NP conjugated to the ligand AP2. The reaction efficiency was determined to be over 70%, with up to two angiopep-2 conjugated per MS2 capsid protein. When linked with a porphyrin ring, manganese (Mn2+) remained stable within MS2 and was MRI detectable. Nanoparticles were introduced intracerebroventricularly or systemically. Systemic delivery yielded dose dependent, non-toxic accumulation of NPs in the midbrain. Design of a multifunctional MRI compatible NP platform provides a significant step forward for the diagnosis and treatment of intractable brain conditions, such as tinnitus.
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Affiliation(s)
- Aaron K Apawu
- Wayne State University School of Medicine, 540 E Canfield St, Detroit, MI, United States
| | - Stephanie M Curley
- SUNY Polytechnic Institute, Colleges of Nanoscale Science and Engineering, 257 Fuller Rd., Albany, NY, United States
| | - Angela R Dixon
- Wayne State University School of Medicine, 540 E Canfield St, Detroit, MI, United States
| | - Mirabela Hali
- Wayne State University School of Medicine, 540 E Canfield St, Detroit, MI, United States
| | - Moaz Sinan
- Wayne State University School of Medicine, 540 E Canfield St, Detroit, MI, United States
| | - Rod D Braun
- Wayne State University School of Medicine, 540 E Canfield St, Detroit, MI, United States
| | - James Castracane
- SUNY Polytechnic Institute, Colleges of Nanoscale Science and Engineering, 257 Fuller Rd., Albany, NY, United States
| | - Anthony T Cacace
- Wayne State University, Department of Communication Sciences & Disorders, 207 Rackham, 60 Farnsworth, Detroit, MI, United States
| | - Magnus Bergkvist
- SUNY Polytechnic Institute, Colleges of Nanoscale Science and Engineering, 257 Fuller Rd., Albany, NY, United States
| | - Avril Genene Holt
- Wayne State University School of Medicine, 540 E Canfield St, Detroit, MI, United States; John D. Dingell VA Medical Center, 4646 John R St, Detroit, MI, United States.
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27
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Balakrishnan-nair DK, Nair ND, Venugopal SK, Das VN, George S, Abraham MJ, Eassow S, Alison MR, Sainulabdeen A, Anilkumar TV. An Immunopathological Evaluation of the Porcine Cholecyst Matrix as a Muscle Repair Graft in a Male Rat Abdominal Wall Defect Model. Toxicol Pathol 2018; 46:169-183. [DOI: 10.1177/0192623317752894] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
With the increasing use of animal-based biomaterials for regenerative medical applications, the need for their safety assessment is paramount. A porcine cholecyst-derived scaffold (CDS), intended as a muscle repair graft, prepared by a nondetergent/enzymatic method was engrafted in a rat abdominal wall defect model. Host tissue–scaffold interface samples were collected 2, 8, and 16 weeks postimplantation and evaluated by histopathology, immunohistochemistry, and electron microscopy. The nature of the tissue reaction was compared with those induced by a jejunum-derived scaffold (JDS) prepared by the same method and a commercial-grade small intestinal submucosa (CSIS) scaffold. A study of the immunopathological response in major lymphoid tissues and immunophenotyping for M1 and M2 macrophages was performed at the host tissue–scaffold interface. Further, “irritancy scores” for CDS and JDS were determined using CSIS as the reference material. Both CDS and JDS appeared to be potential biomaterials for muscle grafts, but the former stimulated a skeletal muscle tissue remodeling response predominated by M2 macrophages. The data support the notion that biomaterials with similar biocompatibility, based on local tissue response on implantation, may cause differential immunogenicity. Additionally, CDS compared to JDS and CSIS was found to be less immunotoxic.
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Affiliation(s)
- Dhanush Krishna Balakrishnan-nair
- Department of Veterinary Pathology, College of Veterinary and Animal Sciences, Kerala Veterinary and Animal Sciences University, Mannuthy, Kerala, India
| | - Narayanan Divakaran Nair
- Department of Veterinary Pathology, College of Veterinary and Animal Sciences, Kerala Veterinary and Animal Sciences University, Mannuthy, Kerala, India
| | - Syam Kunnekkattu Venugopal
- Department of Veterinary Surgery and Radiology, College of Veterinary and Animal Sciences, Kerala Veterinary and Animal Sciences University, Mannuthy, Kerala, India
| | - Vijayan Narayana Das
- Department of Veterinary Pathology, College of Veterinary and Animal Sciences, Kerala Veterinary and Animal Sciences University, Mannuthy, Kerala, India
| | - Sisilamma George
- Department of Veterinary Biochemistry, College of Veterinary and Animal Sciences, Kerala Veterinary and Animal Sciences University, Mannuthy, Kerala, India
| | - Mammen John Abraham
- Department of Veterinary Pathology, College of Veterinary and Animal Sciences, Kerala Veterinary and Animal Sciences University, Mannuthy, Kerala, India
| | - Saji Eassow
- Meat Products of India Ltd., Koothattukulam, Ernakulam District, Edayar, India
| | - Malcolm Ronald Alison
- Barts Cancer Institute, University of London, Charterhouse Square, London, United Kingdom
| | - Anoop Sainulabdeen
- Department of Veterinary Surgery and Radiology, College of Veterinary and Animal Sciences, Kerala Veterinary and Animal Sciences University, Mannuthy, Kerala, India
| | - Thapasimuthu Vijayamma Anilkumar
- Division of Experimental Pathology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Poojappura, Thiruvananthapuram, India
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28
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Abstract
Assessing the immunotoxicity of xenobiotics by current regulatory testing has revealed compounds that can cause immunosuppression and stimulation. Flow cytometry is a cutting edge technique that can provide data on how toxicants can alter the quality and quantity of the immune response after exposure. Here we describe protocols for how to use flow cytometry to measure the immune response in multiple rodent organs (blood and lymphoid and nonlymphoid) as well as in novel models recently being utilized in the field of toxicology. These methods can be used for current testing and to determine mechanisms by which a xenobiotic can cause immunotoxicity.
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Affiliation(s)
- Scott T Espenschied
- Department of Molecular Genetics and Microbiology, Duke University, Durham, NC, USA
| | - Robert M Tighe
- Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - Kymberly M Gowdy
- Department of Pharmacology and Toxicology, Brody School of Medicine, East Carolina University, Greenville, NC, USA.
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29
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Tochitani T, Yamashita A, Matsumoto I, Kouchi M, Fujii Y, Miyawaki I, Yamada T, Bando K. Usefulness of Simultaneous Measurement of Plasma Steroids, Including Precursors, for the Evaluation of Drug Effects on Adrenal Steroidogenesis in Rats. Toxicol Pathol 2017; 45:756-763. [PMID: 29046138 DOI: 10.1177/0192623317730416] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The aim of this study was to evaluate the usefulness of simultaneous measurement of plasma steroids, including precursors, for the evaluation of drug effects on adrenal steroidogenesis in vivo. Plasma concentrations of corticosterone and its precursors were examined in rats dosed with compounds that affect adrenal steroidogenesis via different modes of action as well as the relationships of the changes with blood chemistry and adrenal histopathology. Male rats were dosed with tricresyl phosphate, aminoglutethimide, trilostane (TRL), metyrapone (MET), ketoconazole (KET), or mifepristone for 7 days. In the TRL, MET, and KET groups, precursor levels were markedly increased, while there were no significant changes in the corticosterone level, suggesting that the precursors are more sensitive biomarkers to detect the effect on adrenal steroidogenesis. Also, the precursors with increased levels were those that are normally metabolized by the inhibited enzymes, reflecting the modes of action of the compounds. In addition, different patterns of changes were observed in blood chemistry and histopathology, supporting the mechanism suggested by the steroid changes. These results show that simultaneous measurement of plasma steroids, including precursors, can be a valuable method to sensitively evaluate drug effects on adrenal steroidogenesis and to investigate the underlying mechanisms.
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Affiliation(s)
- Tomoaki Tochitani
- 1 Preclinical Research Laboratories, Sumitomo Dainippon Pharma Co., Ltd., Konohana-ku, Osaka, Japan
| | - Akihito Yamashita
- 1 Preclinical Research Laboratories, Sumitomo Dainippon Pharma Co., Ltd., Konohana-ku, Osaka, Japan
| | - Izumi Matsumoto
- 1 Preclinical Research Laboratories, Sumitomo Dainippon Pharma Co., Ltd., Konohana-ku, Osaka, Japan
| | - Mami Kouchi
- 1 Preclinical Research Laboratories, Sumitomo Dainippon Pharma Co., Ltd., Konohana-ku, Osaka, Japan
| | - Yuta Fujii
- 1 Preclinical Research Laboratories, Sumitomo Dainippon Pharma Co., Ltd., Konohana-ku, Osaka, Japan
| | - Izuru Miyawaki
- 1 Preclinical Research Laboratories, Sumitomo Dainippon Pharma Co., Ltd., Konohana-ku, Osaka, Japan
| | - Toru Yamada
- 1 Preclinical Research Laboratories, Sumitomo Dainippon Pharma Co., Ltd., Konohana-ku, Osaka, Japan
| | - Kiyoko Bando
- 1 Preclinical Research Laboratories, Sumitomo Dainippon Pharma Co., Ltd., Konohana-ku, Osaka, Japan
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30
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Balaban YH, Aka C, Koca-Caliskan U. Liver immunology and herbal treatment. World J Hepatol 2017; 9:757-770. [PMID: 28660010 PMCID: PMC5474722 DOI: 10.4254/wjh.v9.i17.757] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Revised: 04/24/2017] [Accepted: 05/19/2017] [Indexed: 02/06/2023] Open
Abstract
Beyond the metabolic functions, the liver recently has been defined as an organ of immune system (IS), which have central regulatory role for innate and adaptive immunity. The liver keeps a delicate balance between hepatic screening of pathogenic antigens and immune tolerance to self-antigens. Herbal treatments with immunological effects have potential to alter this hepatic immune balance towards either therapeutic side or diseases side by inducing liver injury via hepatotoxicity or initiation of autoimmune diseases. Most commonly known herbal treatments, which have therapeutic effect on liver and IS, have proven via in vitro, in vivo, and/or clinical studies were summarized in this review.
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31
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Impacts of Bisphenol A and Ethinyl Estradiol on Male and Female CD-1 Mouse Spleen. Sci Rep 2017; 7:856. [PMID: 28404993 PMCID: PMC5429804 DOI: 10.1038/s41598-017-00961-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 03/17/2017] [Indexed: 11/08/2022] Open
Abstract
The endocrine disruptor bisphenol A (BPA) and the pharmaceutical 17α-ethinyl estradiol (EE) are synthetic chemicals with estrogen-like activities. Despite ubiquitous human exposure to BPA, and the wide-spread clinical use of EE as oral contraceptive adjuvant, the impact of these estrogenic endocrine disrupting chemicals (EDCs) on the immune system is unclear. Here we report results of in vivo dose response studies that analyzed the histology and microstructural changes in the spleen of adult male and female CD-1 mice exposed to 4 to 40,000 μg/kg/day BPA or 0.02 to 2 μg/kg/day EE from conception until 12–14 weeks of age. Results of that analysis indicate that both BPA and EE have dose- and sex-specific impacts on the cellular and microanatomical structures of the spleens that reveal minor alterations in immunomodulatory and hematopoietic functions. These findings support previous studies demonstrating the murine immune system as a sensitive target for estrogens, and that oral exposures to BPA and EE can have estrogen-like immunomodulatory affects in both sexes.
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32
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Kuper CF, Wijnands MVW, Zander SAL. Mucosa-Associated Lymphoid Tissues. IMMUNOPATHOLOGY IN TOXICOLOGY AND DRUG DEVELOPMENT 2017. [DOI: 10.1007/978-3-319-47385-7_4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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33
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Tochitani T, Yamashita A, Kouchi M, Fujii Y, Matsumoto I, Miyawaki I, Yamada T, Funabashi H. Changes in plasma concentrations of corticosterone and its precursors after ketoconazole administration in rats: An application of simultaneous measurement of multiple steroids using LC–MS/MS. ACTA ACUST UNITED AC 2016; 68:125-31. [DOI: 10.1016/j.etp.2015.11.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Revised: 10/18/2015] [Accepted: 11/11/2015] [Indexed: 01/15/2023]
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34
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Valančiūtė A, Mozuraitė R, Balnytė I, Didžiapetrienė J, Matusevičius P, Stakišaitis D. Sodium valproate effect on the structure of rat glandule thymus: Gender-related differences. ACTA ACUST UNITED AC 2015; 67:399-406. [DOI: 10.1016/j.etp.2015.04.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 03/03/2015] [Accepted: 04/12/2015] [Indexed: 12/30/2022]
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35
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Parker GA, Picut CA, Swanson C, Toot JD. Histologic Features of Postnatal Development of Immune System Organs in the Sprague-Dawley Rat. Toxicol Pathol 2015; 43:794-815. [PMID: 25883109 DOI: 10.1177/0192623315578720] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The immune system of the rat undergoes substantial functional and morphological development during the postnatal period. Some aspects of this development are genetically predetermined, while other aspects depend on environmental influences. Detailed information on postnatal development is important in the interpretation of histopathologic findings in juvenile toxicology and pubertal assay studies, as well as other studies conducted in juvenile rats. Studies were conducted to provide detailed characterization of histologic features of the major functional compartments of immune system organs in male and female Sprague-Dawley rats at weekly intervals from the day of birth through postnatal day (PND) 42. Maturation of the individual immune system organs occurred across a range of ages, with histologic maturation of T-cell-related compartments typically occurring prior to maturation of B-cell-related compartments. The sequence of histologic maturation was bone marrow and thymus on PND 14, mesenteric lymph node on PND 21, Peyer's patches and bronchus-associated lymphoid tissue on PND 28, mandibular lymph node, nasopharynx-associated lymphoid tissue, and diffuse mucosal mononuclear cell population of small intestine on PND 35, and spleen on PND 42. An estimation of functional maturation can be made based on the morphological indications of maturity of each compartment of immune system organs, but histologic indications of maturity do not confirm functional immunocompetence.
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36
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Kemmerling J, Fehlert E, Kuper CF, Rühl-Fehlert C, Stropp G, Vogels J, Krul C, Vohr HW. The transferability from rat subacute 4-week oral toxicity study to translational research exemplified by two pharmaceutical immunosuppressants and two environmental pollutants with immunomodulating properties. Eur J Pharmacol 2015; 759:326-42. [PMID: 25823813 DOI: 10.1016/j.ejphar.2015.03.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 03/05/2015] [Accepted: 03/12/2015] [Indexed: 01/29/2023]
Abstract
Exposure to chemicals may have an influence on the immune system. Often, this is an unwanted effect but in some pharmaceuticals, it is the intended mechanism of action. Immune function tests and in depth histopathological investigations of immune organs were integrated in rodent toxicity studies performed according to an extended OECD test guideline 407 protocol. Exemplified by two immunosuppressive drugs, azathioprine and cyclosporine A, and two environmental chemicals, hexachlorobenzene and benzo[a]pyrene, results of subacute rat studies were compared to knowledge in other species particular in humans. Although immune function has a high concordance in mammalian species, regarding the transferability from rodents to humans various factors have to be taken into account. In rats, sensitivity seems to depend on factors such as strain, sex, stress levels as well as metabolism. The two immunosuppressive drugs showed a high similarity of effects in animals and humans as the immune system was the most sensitive target in both. Hexachlorobenzene gave an inconsistent pattern of effects when considering the immune system of different species. In some species pronounced inflammation was observed, whereas in primates liver toxicity seemed more obvious. Generally, the immune system was not the most sensitive target in hexachlorobenzene-treatment. Immune function tests in rats gave evidence of a reaction to systemic inflammation rather than a direct impact on immune cells. Data from humans are likewise equivocal. In the case of benzo[a]pyrene, the immune system was the most sensitive target in rats. In the in vitro plaque forming cell assay (Mishell-Dutton culture) a direct comparison of cells from different species including rat and human was possible and showed similar reactions. The doses in the rat study had, however, no realistic relation to human exposure, which occurs exclusively in mixtures and in a much lower range. In summary, a case by case approach is necessary when testing immunotoxicity. Improvements for the translation from animals to humans related to immune cells can be expected from in vitro tests which offer direct comparison with reactions of human immune cells. This may lead to a better understanding of results and variations seen in animal studies.
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Affiliation(s)
- Jessica Kemmerling
- Bayer Pharma AG, GDD-GED-TOX-IT-Immunotoxicology, Aprather Weg, 42096 Wuppertal, Germany.
| | - Ellen Fehlert
- Department of Medicine IV, Eberhard-Karls University, Otfried-Müller Street 10, 72076 Tübingen, Germany
| | - C Frieke Kuper
- TNO Innovation for Life, PO Box 360, 3700 AJ Zeist, The Netherlands
| | | | - Gisela Stropp
- Bayer Pharma AG, GDD-GED-Product Stewardship Industrial Chemicals, Aprather Weg, 42096 Wuppertal, Germany
| | - Jack Vogels
- TNO Innovation for Life, PO Box 360, 3700 AJ Zeist, The Netherlands
| | - Cyrille Krul
- TNO Innovation for Life, PO Box 360, 3700 AJ Zeist, The Netherlands
| | - Hans-Werner Vohr
- Bayer Pharma AG, GDD-GED-TOX-IT-Immunotoxicology, Aprather Weg, 42096 Wuppertal, Germany
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Biocompatibility and Immunophenotypic Characterization of a Porcine Cholecyst–derived Scaffold Implanted in Rats. Toxicol Pathol 2014; 43:536-45. [DOI: 10.1177/0192623314550722] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Comparative histomorphological assessment of local response to implanted reference biomaterial, also called biocompatibility testing/evaluation, in an appropriate animal model is a widely practiced safety evaluation procedure performed on biomaterials before clinical use. Standardized protocols and procedures, originally designed for testing synthetic materials, available for the testing/evaluation do not account for the immunogenic potential of a candidate biomaterial. Therefore, it is appropriate to supplement the routine biocompatibility test reports with adjunct data that may provide insight into the immunogenic potential of candidate biomaterials, especially when testing biomaterials that are derived from mammalian sources. This article presents expanded safety evaluation data of a porcine cholecyst–derived scaffold (CDS) intended as a xenogeneic graft. The biocompatibility was tested in rat subcutaneous model in comparison with a reference material and the CDS was found biocompatible. However, when studied by immunohistochemistry and real-time reverse transcription polymerase chain reaction for the number and/or polarization of M1 macrophage, M2 macrophage, cytotoxic T-cell, helper T cell, TH1 cell, and TH2 cell, the CDS appeared to induce a differential local immunopathological tissue reaction despite the similarity in biocompatibility with the reference material. The adjunct data collected were useful for objectively assessing the safety of CDS as a xenograft.
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Dietary exposure of juvenile female mice to polyhalogenated seafood contaminants (HBCD, BDE-47, PCB-153, TCDD): Comparative assessment of effects in potential target tissues. Food Chem Toxicol 2013; 56:443-9. [DOI: 10.1016/j.fct.2013.02.056] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Revised: 02/21/2013] [Accepted: 02/28/2013] [Indexed: 12/26/2022]
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De Camargo MR, Barbisan LF, Martinez MF, Da Silva Franchi CA, De Camargo JLV, Spinardi-Barbisan ALT. Macrophage activity and histopathology of the lymphohematopoietic organs in male Wistar rats orally exposed to single or mixed pesticides. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2013; 48:607-613. [PMID: 23581695 DOI: 10.1080/03601234.2013.775020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The noxious effects of low or effective dose exposure to single or mixed pesticides on macrophage activity and the lymphohematopoietic organs were investigated. Male Wistar rats were orally exposed to dichlorvos, dicofol, endosulfan, dieldrin and permethrin, either as single or combined mixtures during a 28-day study containing eight groups: one group received a semipurified diet (non-treated); two groups received a semipurified diet containing low dose mixture (dieldrin 0.025 mg/kg, endosulfan, 0.6 mg/kg, dicofol 0.22 mg/kg, dichlorvos 0.23 mg/kg, permethrin 5 mg/kg) or an effective dose mixture (dichlorvos 2.3 mg/kg, dicofol 2.5 mg/kg, endosulfan 2.9 mg/kg, dieldrin 0.05 mg/kg and permethrin 25.0 mg/kg), respectively; the other five groups received a semipurified diet containing each single pesticide in effective doses. At sacrifice, the thymus, spleen, mesenteric lymph nodes, Payer's patches and bone marrow were removed for histological analysis. Peritoneal macrophages were obtained to determine the phagocytosis and spreading indexes and tumoral necrosis factor alpha (TNF-α), nitric oxide (NO) and H₂O₂ production. Exposure to pesticide mixtures did not alter the percentage of macrophage phagocytosis and spreading, TNF-α production or the NO and H₂O₂ release when compared to the non-treated group. Neither was there any apparent evidence that a pesticide mixture at low or effective doses altered the histological structure of the lymphohematopoietic organs. The findings indicate that short-term treatment with pesticide mixtures did not induce an apparent immunotoxic effect in male Wistar rats.
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Affiliation(s)
- Marcela Rodrigues De Camargo
- a Department of Pathology, Botucatu Medical School , UNESP - Univ. Estadual Paulista , Botucatu , São Paulo State , Brazil
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40
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Ward JM, Rehg JE, Morse HC. Differentiation of rodent immune and hematopoietic system reactive lesions from neoplasias. Toxicol Pathol 2012; 40:425-34. [PMID: 22215512 PMCID: PMC3443630 DOI: 10.1177/0192623311431467] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The immune and hematopoietic systems play an important role in the normal homeostasis of blood and blood cells and for immune responses to endogenous and exogenous processes and insults. In order to interpret histopathologic changes in the immune and hematopoietic systems, it is important to understand the normal anatomy and histology of the thymus, spleen, lymph nodes, bone marrow, and other tissues. The thymus, spleen, and lymph nodes can be categorized by anatomical compartments, each of which contributes to specific immune functions. Lesions may be diagnosed by interpretive or descriptive (semiquantitative) methods. The interpretation of these tissues by lesion in anatomical compartments should allow for better understanding of these reactions and more definitive pathologic findings. Proliferative lesions may be difficult to differentiate from lymphomas and leukemias. The use of immunohistochemistry, compartmental pathology, and methods for the evaluation of clonality will make interpretation easier.
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Affiliation(s)
- Jerrold M Ward
- Global VetPathology and Laboratory of Immunopathology, NIAID, NIH, Bethesda, Maryland 20892, USA.
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