Toxicologic PathologyPub Date : 2025-07-01Epub Date: 2025-03-28DOI: 10.1177/01926233251322767
Ruba Ibrahim, Abraham Nyska, Susan A Elmore, Molly Boyle, Yuval Ramot
{"title":"Interpretative Challenges in Animal Studies: Review of Case Studies and Implications for Toxicologic Pathology.","authors":"Ruba Ibrahim, Abraham Nyska, Susan A Elmore, Molly Boyle, Yuval Ramot","doi":"10.1177/01926233251322767","DOIUrl":"10.1177/01926233251322767","url":null,"abstract":"<p><p>Toxicologic pathologists play a crucial role in the evaluation of animal studies for drugs, environmental chemicals, medical devices, and other agents to determine their safety and potential toxic effects. A significant challenge in this domain is the differentiation between incidental or procedural changes and genuine treatment-related effects. Correct identification and interpretation of such findings are essential to ensure that safety assessments are accurate and reliable for subsequent approval for human use. This review presents several cases in which non-test item-related findings were encountered. By examining procedure-related findings and considering spontaneous background pathology, we underscore the need for meticulous pathological evaluation and proper contextual understanding to avoid misinterpretations that could lead to erroneous conclusions about a substance's safety profile. The insights shared in this review aim to enhance the proficiency of toxicologic pathologists in recognizing and managing various interpretative challenges, with the goal of ultimately improving the accuracy of toxicological assessments, thereby contributing to the safe development of new therapeutics and medical devices and sound characterization of potentially hazardous substances in our environment.</p>","PeriodicalId":23113,"journal":{"name":"Toxicologic Pathology","volume":" ","pages":"440-455"},"PeriodicalIF":1.4,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143731190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Toxicologic PathologyPub Date : 2025-06-01Epub Date: 2025-05-06DOI: 10.1177/01926233251337033
Dinesh S Bangari, Saravanan Kaliyaperumal
{"title":"Inaugural Special Issue Celebrating the 21st Annual Congress of the European Society of Toxicologic Pathology.","authors":"Dinesh S Bangari, Saravanan Kaliyaperumal","doi":"10.1177/01926233251337033","DOIUrl":"10.1177/01926233251337033","url":null,"abstract":"","PeriodicalId":23113,"journal":{"name":"Toxicologic Pathology","volume":" ","pages":"304"},"PeriodicalIF":1.4,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144033004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Toxicologic PathologyPub Date : 2025-06-01Epub Date: 2025-02-12DOI: 10.1177/01926233251316283
Flora Wegener, Antoine Alves, Uta Bussmeyer, Nicole V Soucy
{"title":"2023 International Academy of Toxicologic Pathology (IATP) Satellite Symposium: \"Medical Device Safety Assessment: Pathology and Toxicology Perspective\".","authors":"Flora Wegener, Antoine Alves, Uta Bussmeyer, Nicole V Soucy","doi":"10.1177/01926233251316283","DOIUrl":"10.1177/01926233251316283","url":null,"abstract":"<p><p>Medical devices represent a complex category of medicinal products with varying definitions depending on the regional jurisdiction of regulatory agencies. A common aspect of these definitions is that a medical device is intended to be used for specific medicinal purpose where the primary intended action of the device is not achieved through pharmacologic (or other chemical) means. While regional regulatory frameworks for medical devices are different than for pharmaceutical or biological products, medical device manufacturers are required to evaluate the safety and performance of these products in the context of their intended use. In biological safety evaluation, histopathology plays a relevant role in assessing medical device biocompatibility. This manuscript provides a broad overview of biocompatibility assessment with a deeper look at the role of the toxicologic pathologist in assessing innovative and emerging bone therapies. The content of this manuscript is based on individual presentations delivered at the 2023 International Academy of Toxicologic Pathology (IATP) Satellite Symposium held in conjunction with the Annual Congress of the European Society of Toxicologic Pathology (ESTP) on 26 September, in Basel, Switzerland.</p>","PeriodicalId":23113,"journal":{"name":"Toxicologic Pathology","volume":" ","pages":"405-422"},"PeriodicalIF":1.4,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143400062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Toxicologic PathologyPub Date : 2025-06-01Epub Date: 2025-05-13DOI: 10.1177/01926233251332210
Brad Bolon, Joe N Kornegay
{"title":"A Fandango of Form and Function: The Interplay Between Clinical Neurology and Neuropathology Evaluation.","authors":"Brad Bolon, Joe N Kornegay","doi":"10.1177/01926233251332210","DOIUrl":"10.1177/01926233251332210","url":null,"abstract":"<p><p>The central (CNS) and peripheral (PNS) nervous systems of vertebrates represent divisions of a continuous, body-wide communication grid based on conserved principles of structural organization. Discrete neuroanatomic regions within this grid are associated with specific neural functions, so distinct patterns of neurological dysfunction (\"problems\") can provide guidance regarding neural regions to evaluate beyond those in published sampling schemes or institutional standard operating procedures. Each neurological problem or syndrome (i.e., a group of in-life signs indicating that a given neuroanatomic region is damaged) is associated with a particular list of differential diagnoses and causes. Vulnerability of neural cells and tissues is influenced by intrinsic tissue properties (e.g., high metabolic rates of neurons, presence of blood:tissue barriers, degree of collateral vascular supply) and extrinsic factors (bone protuberances and connective tissue partitions impinging on neural surfaces, fluid flow patterns in the cerebroventricular system and meninges, etc.). In the toxicologic pathology setting, expansion (when warranted) of routine neural sampling protocols to collect additional anatomic regions correlated to a specific neurological problem improves the likelihood that a neuropathological evaluation will identify lesions and causes responsible for neurological conditions as well as detect findings related to potential test item-related neurotoxicity.</p>","PeriodicalId":23113,"journal":{"name":"Toxicologic Pathology","volume":" ","pages":"321-344"},"PeriodicalIF":1.4,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144047931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Toxicologic PathologyPub Date : 2025-06-01Epub Date: 2025-05-31DOI: 10.1177/01926233251335326
Deepa B Rao, Xavier Palazzi, Alexandra Duetting, Ann Kathrin Haverkamp, Annette Romeike, Kristel Kegler, Klaus Weber, Brad Bolon, Amber Moser, Elizabeth Chlipala, Stefanie Arms, Enrico Vezzali, Erio Barale-Thomas, Jogile Kuklyte, Laoise Lord Bissett, Alok K Sharma, Ingrid D Pardo
{"title":"Neuromethods: Basic Techniques for Evaluating the Nervous System in Nonclinical Studies.","authors":"Deepa B Rao, Xavier Palazzi, Alexandra Duetting, Ann Kathrin Haverkamp, Annette Romeike, Kristel Kegler, Klaus Weber, Brad Bolon, Amber Moser, Elizabeth Chlipala, Stefanie Arms, Enrico Vezzali, Erio Barale-Thomas, Jogile Kuklyte, Laoise Lord Bissett, Alok K Sharma, Ingrid D Pardo","doi":"10.1177/01926233251335326","DOIUrl":"10.1177/01926233251335326","url":null,"abstract":"<p><p>The first session of the 2025 European Society of Toxicologic Pathology (ESTP) Congress reviewed routine and specialized methods for microscopic evaluation of neural tissues during nonclinical studies. Three longer presentations reviewed brain sampling approaches in safety assessments, including an example to accentuate topographical analysis and integration of toxicology data; specific brain and spinal cord sampling for molecular and protein analyses; and an overview of technical aspects of intraparenchymal drug delivery. Four shorter talks discussed the uses, advantages, disadvantages, and interpretation of several special neurohistological techniques (stains and immunohistochemical markers) for assessing test item-associated responses. Common special methods used (when warranted) for nonclinical studies include Fluoro-Jade or silver stains for detecting neuronal death, Luxol fast blue (LFB) for examining myelin, anti-glial fibrillary acidic protein (GFAP) to demonstrate reactive astrocytes, and anti-ionized calcium-binding adaptor molecule 1 (IBA1) to highlight reactive microglia and macrophages, though alternatives methods were described. The last presentation discussed artificial intelligence as an aid in detecting subtle toxicant-induced lesions during digital pathology analyses (using the Olney lesion [acute neuronal vacuolation and necrosis in the cerebral cortex] as an example). Taken together, talks in this session provided a cohesive overview of traditional and innovative approaches to facilitate microscopic evaluation for potential neurotoxicity in nonclinical studies.</p>","PeriodicalId":23113,"journal":{"name":"Toxicologic Pathology","volume":" ","pages":"355-363"},"PeriodicalIF":1.4,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144192165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Toxicologic PathologyPub Date : 2025-06-01Epub Date: 2025-05-06DOI: 10.1177/01926233251335320
Stefanie Arms, Stephen D Cahalan, Felix Goulet, Katja Hempel, Giovanni Pellegrini, Sophie Rau, Julia Schlichtiger, Thomas Nolte
{"title":"Bilateral Basal Nuclei Vacuolar Lesions: A Novel and Emerging Potential Background Finding in Beagle Dogs.","authors":"Stefanie Arms, Stephen D Cahalan, Felix Goulet, Katja Hempel, Giovanni Pellegrini, Sophie Rau, Julia Schlichtiger, Thomas Nolte","doi":"10.1177/01926233251335320","DOIUrl":"10.1177/01926233251335320","url":null,"abstract":"<p><p>In this case presentation, the speaker and co-authors represented a group of scientists engaged in a cross-institutional precompetitive working group focused on elucidating a novel background change in the basal nuclei of Beagle dogs. The group's ongoing efforts since first publication of the lesion in 2024 enabled further characterization of the lesion and revealed additional incidences in control animals. The characterization, including newly discovered lesion features, and terminology of the condition were outlined and suggestions for interpretation in nonclinical toxicity studies were given.</p>","PeriodicalId":23113,"journal":{"name":"Toxicologic Pathology","volume":" ","pages":"403-404"},"PeriodicalIF":1.4,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144000294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Toxicologic PathologyPub Date : 2025-06-01Epub Date: 2025-03-20DOI: 10.1177/01926233251326089
Pierluigi Fant, Sébastien Laurent, Paul Desert, Behazine Combadière, Xavier Palazzi, Shambhunath Choudhary, Frédéric Gervais, Karine Broudic, Roberta Rossi, Béatrice E Gauthier
{"title":"Proceedings of the 2023 Annual Scientific Meeting of the French Society of Toxicologic Pathology (SFPT) on Preclinical Development and Therapeutic Applications of mRNA-Based Technologies.","authors":"Pierluigi Fant, Sébastien Laurent, Paul Desert, Behazine Combadière, Xavier Palazzi, Shambhunath Choudhary, Frédéric Gervais, Karine Broudic, Roberta Rossi, Béatrice E Gauthier","doi":"10.1177/01926233251326089","DOIUrl":"10.1177/01926233251326089","url":null,"abstract":"<p><p>The 2023 annual scientific meeting of the French Society of Toxicologic Pathology (Société Française de Pathologie Toxicologique, SFPT), entitled \"mRNA-based technologies: preclinical development and therapeutic applications,\" was held in Lyon (France) on May 25 to 26, 2023. The aim of the meeting was to discuss the biology, immunology, and preclinical development of messenger RNA (mRNA)-based vaccines and therapeutics, including immuno-oncology and rare diseases, as well as the regulatory aspect of the COVID-19 vaccines and an overview of the principles and applications of in situ hybridization techniques. This article presents the summary of five lectures along with selected figures, tables, and key literature references on this topic.</p>","PeriodicalId":23113,"journal":{"name":"Toxicologic Pathology","volume":" ","pages":"423-434"},"PeriodicalIF":1.4,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143664365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Toxicologic PathologyPub Date : 2025-06-01Epub Date: 2025-05-06DOI: 10.1177/01926233251335849
Andrea Greiter-Wilke, Nicolau Beckmann, Warren E Glaab, Diethilde J Theil, Ingrid D Pardo
{"title":"Neurobiomarkers: Basic Aspects and Their Relevance in Nonclinical Studies.","authors":"Andrea Greiter-Wilke, Nicolau Beckmann, Warren E Glaab, Diethilde J Theil, Ingrid D Pardo","doi":"10.1177/01926233251335849","DOIUrl":"10.1177/01926233251335849","url":null,"abstract":"<p><p>The second session of the 2024 European Society of Toxicologic Pathology (ESTP) Congress highlighted the significance of neural biomarkers and functional endpoints in nonclinical studies for detecting acute or delayed peripheral (PNS) and central nervous system (CNS) alterations and /or injury caused by drugs during development. The session emphasized the potential clinical translation of these biomarkers and endpoints and critical role of pathologists in correlating these biomarkers with the microscopic findings. Key neural biomarkers discussed included fluid-based biomarkers such as Neurofilament Light Chain (NF-L), Nonspecific Enolase (NSE), Tubulin Associated Unit (TAU), and Glial Fibrillar Associated Protein (GFAP) in blood and/or cerebrospinal fluid (CSF). These were evaluated in 15 in-vivo studies conducted with CNS and PNS toxicants. Safety pharmacology evaluation, such as the Irwin screen/the functional observation battery (FOB), were presented for detecting drug effects on behavior, motor and sensory functions in both rodents and nonrodent species, with or without histopathological correlate. Follow-up tests like nerve conduction velocity assessment were also highlighted. The session underscored the usefulness of noninvasive imaging modalities, including magnetic resonance imaging (MRI), nuclear imaging techniques, X-ray computed tomography, and ultrasound in preclinical studies. Overall, integrating neural biomarkers, safety pharmacology endpoints, advanced imaging modalities, and detailed histopathological analysis aids in better predicting neurotoxicity.</p>","PeriodicalId":23113,"journal":{"name":"Toxicologic Pathology","volume":" ","pages":"381-386"},"PeriodicalIF":1.4,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144033150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Toxicologic PathologyPub Date : 2025-06-01Epub Date: 2025-03-13DOI: 10.1177/01926233251320056
Pierre Maliver, Julie Boisclair, Ingrid Pardo, Luisa Bell, Kerstin Hahn, Benedek Pesti, Stefanie Arms, Elizabeth Galbreath
{"title":"Recent Neuropathology Concepts.","authors":"Pierre Maliver, Julie Boisclair, Ingrid Pardo, Luisa Bell, Kerstin Hahn, Benedek Pesti, Stefanie Arms, Elizabeth Galbreath","doi":"10.1177/01926233251320056","DOIUrl":"10.1177/01926233251320056","url":null,"abstract":"<p><p>The last session of the 2024 European Society of Toxicologic Pathology Congress was dedicated to recent neuro concepts, encompassing various topics including artificial intelligence (AI) applied to toxicologic pathology, new technologies for visualization and/or analysis of tissues, as well as specific case reports. Four presentations detailed the role of AI and computational pathology for toxicologic pathologists, usage of cryofluorescent tomography in neuropathology, blood-brain barrier organoids in early drug screening, and spatial transcriptomics in toxicologic pathology. In addition, there were two short presentations about a spontaneous brain lesion in Beagle dogs as well as central nervous system lesions related to adeno-associated virus vectors administration in various preclinical species. This session underscored the current and prospective impact of emerging technologies on drug screening and development.</p>","PeriodicalId":23113,"journal":{"name":"Toxicologic Pathology","volume":" ","pages":"393-396"},"PeriodicalIF":1.4,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143626176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Toxicologic PathologyPub Date : 2025-06-01Epub Date: 2025-05-15DOI: 10.1177/01926233251339105
Laura Fusaro, Dinesh S Bangari, R Jeroen Pasterkamp, Javier Fernández-Ruiz, Sameh A Youssef, Alok K Sharma
{"title":"Neurodegenerative Diseases: Pathogenesis and Preclinical Models for Translational Drug Discovery.","authors":"Laura Fusaro, Dinesh S Bangari, R Jeroen Pasterkamp, Javier Fernández-Ruiz, Sameh A Youssef, Alok K Sharma","doi":"10.1177/01926233251339105","DOIUrl":"10.1177/01926233251339105","url":null,"abstract":"<p><p>The fourth session of the 2024 European Society of Toxicologic Pathology (ESTP) Congress brought together lectures focused on the use of in vitro and in vivo models to investigate neurodegenerative diseases. Four presentations highlighted various aspects of neurodegenerative diseases including dementia, immune-mediated conditions, and neuromuscular disorders. The session began with an overview of animal models of dementia underscoring their critical role in understanding disease pathogenesis and supporting the development of effective therapeutic drugs. Subsequent presentations investigated immunological self-tolerance in autoimmune neurodegenerative diseases, such as multiple sclerosis and Guillain-Barré syndrome, and the application of in vitro models to study neuromuscular diseases such as amyotrophic lateral sclerosis. The final presentation examined cannabinoid-based therapeutic options for treating neurodegenerative diseases, highlighting their potential in neuroprotection and neurorepair. This session provided valuable insights into the latest research and advancements in neurodegenerative disease modeling and therapy, offering promising directions for improved modeling and therapeutic strategies.</p>","PeriodicalId":23113,"journal":{"name":"Toxicologic Pathology","volume":" ","pages":"364-371"},"PeriodicalIF":1.4,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144080343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}