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Quist EM, Chamanza R, Martinot AJ, Boone A, Krane GA, Hensel ME, Lennix SV. Proceedings of the 2023 Division of Translational Toxicology Satellite Symposium. Toxicol Pathol 2023; 51:437-464. [PMID: 38445604 PMCID: PMC11426369 DOI: 10.1177/01926233241231287] [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: 03/07/2024]
Abstract
The 2023 annual Division of Translational Toxicology (DTT) Satellite Symposium, entitled "Pathology Potpourri," was held in Summerlin, Nevada, at the Society of Toxicologic Pathology's 41st annual meeting. The goal of this symposium was to present and discuss challenging diagnostic pathology and/or nomenclature issues. This article presents summaries of the speakers' talks along with select images that were used by the audience for voting and discussion. Various lesions and topics covered during the symposium included induced and spontaneous neoplastic and nonneoplastic lesions in the mouse liver, infectious and proliferative lesions in nonhuman primates, interesting presentations of mononuclear cell infiltrates in various animal models and a complex oral tumor in a rat.
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Affiliation(s)
- Erin M Quist
- Charles River Laboratories, Inc., Durham, North Carolina, USA
| | - Ronnie Chamanza
- Janssen Pharmaceutical Companies of Johnson & Johnson, High Wycombe, UK
| | | | - Allison Boone
- Experimental Pathology Laboratories, Inc., Durham, North Carolina, USA
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Murphy B, Michel A, LaDouceur E, Bell C, Lin M, Imai D. Ameloblastoma of the Jaw in Three Species of Rodent: a Domestic Brown Rat ( Rattus norvegicus ), Syrian Hamster ( Mesocricetus auratus ) and Amargosa Vole ( Microtus californicus scirpensis ). J Comp Pathol 2017; 157:145-149. [DOI: 10.1016/j.jcpa.2017.07.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 06/20/2017] [Accepted: 07/04/2017] [Indexed: 11/28/2022]
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Fossey S, Vahle J, Long P, Schelling S, Ernst H, Boyce RW, Jolette J, Bolon B, Bendele A, Rinke M, Healy L, High W, Roth DR, Boyle M, Leininger J. Nonproliferative and Proliferative Lesions of the Rat and Mouse Skeletal Tissues (Bones, Joints, and Teeth). J Toxicol Pathol 2016; 29:49S-103S. [PMID: 27621538 PMCID: PMC5013709 DOI: 10.1293/tox.29.3s-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The INHAND (International Harmonization of Nomenclature and Diagnostic Criteria for Lesions in Rats and Mice) Project (www.toxpath.org/inhand.asp) is an initiative of the Societies of Toxicological Pathology from Europe (ESTP), Great Britain (BSTP), Japan (JSTP) and North America (STP) to develop an internationally accepted nomenclature for proliferative and nonproliferative lesions in laboratory animals. The purpose of this publication is to provide a standardized nomenclature for classifying microscopic lesions observed in the skeletal tissues and teeth of laboratory rats and mice, with color photomicrographs illustrating examples of many common lesions. The standardized nomenclature presented in this document is also available on the internet (http://www.goreni.org/). Sources of material were databases from government, academic and industrial laboratories throughout the world.
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Affiliation(s)
| | - John Vahle
- Lilly Research Laboratories, Indianapolis, IN, USA
| | | | - Scott Schelling
- Pfizer Inc., Andover, MA, USA
- Dr. Schelling retired April 2015
| | | | | | | | | | | | | | - Laura Healy
- LNH Tox Path Consulting, LLC, Kalamazoo, MI, USA
| | - Wanda High
- WB High Preclin Path/Tox Consulting, LLC, Rochester, NY,
USA
| | | | | | - Joel Leininger
- JRL Consulting, LLC, Chapel Hill, NC, USA
- Chair of the Skeletal Tissues INHAND Committee
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Abstract
BK polyomavirus (BKPyV) is the most common viral pathogen among allograft patients. Increasing evidence links BKPyV to the human oral compartment and to HIV-associated salivary gland disease (HIVSGD). To date, few studies have analyzed orally derived BKPyV. This study aimed to characterize BKPyV isolated from throat wash (TW) samples from HIVSGD patients. The replication potential of HIVSGD-derived clinical isolates HIVSGD-1 and HIVSGD-2, both containing the noncoding control region (NCCR) architecture OPQPQQS, were assessed and compared to urine-derived virus. The BKPyV isolates displayed significant variation in replication potential. Whole-genome alignment of the two isolates revealed three nucleotide differences that were analyzed for a potential effect on the viral life cycle. Analysis revealed a negligible difference in NCCR promoter activity despite sequence variation and emphasized the importance of functional T antigen (Tag) for efficient replication. HIVSGD-1 encoded full-length Tag, underwent productive infection in both human salivary gland cells and kidney cells, and expressed viral DNA and Tag protein. Additionally, HIVSGD-1 generated DNase-resistant particles and by far surpassed the replication potential of the kidney-derived isolate in HSG cells. HIVSGD-2 encoded a truncated form of Tag and replicated much less efficiently. Quantitation of infectious virus, via the fluorescent forming unit assay, suggested that HIVSGD BKPyV had preferential tropism for salivary gland cells over kidney cells. Similarly, the results suggested that kidney-derived virus had preferential tropism for kidney cells over salivary gland cells. Evidence of HIVSGD-derived BKPyV oral tropism and adept viral replication in human salivary gland cells corroborated the potential link between HIVSGD pathogenesis and BKPyV.
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Huang Z, Newcomb CJ, Bringas P, Stupp SI, Snead ML. Biological synthesis of tooth enamel instructed by an artificial matrix. Biomaterials 2010; 31:9202-11. [PMID: 20869764 DOI: 10.1016/j.biomaterials.2010.08.013] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2010] [Accepted: 08/05/2010] [Indexed: 01/13/2023]
Abstract
The regenerative capability of enamel, the hardest tissue in the vertebrate body, is fundamentally limited due to cell apoptosis following maturation of the tissue. Synthetic strategies to promote enamel formation have the potential to repair damage, increase the longevity of teeth and improve the understanding of the events leading to tissue formation. Using a self-assembling bioactive matrix, we demonstrate the ability to induce ectopic formation of enamel at chosen sites adjacent to a mouse incisor cultured in vivo under the kidney capsule. The resulting material reveals the highly organized, hierarchical structure of hydroxyapatite crystallites similar to native enamel. This artificially triggered formation of organized mineral demonstrates a pathway for developing cell fabricated materials for treatment of dental caries, the most ubiquitous disease in man. Additionally, the artificial matrix provides a unique tool to probe cellular mechanisms involved in tissue formation further enabling the development of tooth organ replacements.
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Affiliation(s)
- Zhan Huang
- The Center for Craniofacial Molecular Biology, Herman Ostrow School of Dentistry, University of Southern California, 2250 Alcazar St., Los Angeles, CA 90033, USA
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Ando M, Kado S, Hashimoto K, Nagata Y, Iwata S, Takahashi M, Uchida K, Onoue M. Ameloblastic Odontoma with Amyloid Deposition in a Mouse. J Toxicol Pathol 2005. [DOI: 10.1293/tox.18.117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Minoru Ando
- Yakult Central Institute for Microbiological Research
| | - Shoichi Kado
- Yakult Central Institute for Microbiological Research
| | | | - Yuriko Nagata
- Yakult Central Institute for Microbiological Research
| | - Shin Iwata
- Yakult Central Institute for Microbiological Research
| | | | - Kazumi Uchida
- Yakult Central Institute for Microbiological Research
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Abstract
Malformations of the maxillary incisors, diagnosed as dental dysplasia, were observed as a spontaneous background lesion in 3% (females) to 9% (males) of CD-1 mice and 14.5% (females) to 10.5% (males) of CD (Sprague-Dawley) rats in a chronic inhalation study. Lesions were reported grossly as overgrown, maloccluded, or malformed incisors. Microscopic findings included tooth pulp and periodontal abscesses, fractured and necrotic teeth, periodontal cysts, malformations of the incisor roots, and expansile masses, including odontomas, of the incisor roots. Development of lesions followed a pattern of tooth pulp necrosis and/or traumatic disruption of the epithelial root sheath at the base of the tooth. Feeding a powdered ration, which reduced the normal wearing of the incisors, and repeated clipping of overgrown incisors were believed to contribute to the incidence of disease.
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Affiliation(s)
- P E Losco
- Bushy Run Research Center, Export, Pennsylvania 15632, USA
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