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Interpretation of thyroid-relevant bioactivity data for comparison to in vivo exposures: A prioritization approach for putative chemical inhibitors of in vitro deiodinase activity 甲状腺相关生物活性数据与体内暴露比较的解释:体外脱碘酶活性推定化学抑制剂的优先方法
IF 4.8 3区 医学
Toxicology Pub Date : 2025-04-20 DOI: 10.1016/j.tox.2025.154157
K.T. Truong , J.F. Wambaugh , D.F. Kapraun , SE Davidson-Fritz , S. Eytcheson , R.S. Judson , K. Paul Friedman
{"title":"Interpretation of thyroid-relevant bioactivity data for comparison to in vivo exposures: A prioritization approach for putative chemical inhibitors of in vitro deiodinase activity","authors":"K.T. Truong ,&nbsp;J.F. Wambaugh ,&nbsp;D.F. Kapraun ,&nbsp;SE Davidson-Fritz ,&nbsp;S. Eytcheson ,&nbsp;R.S. Judson ,&nbsp;K. Paul Friedman","doi":"10.1016/j.tox.2025.154157","DOIUrl":"10.1016/j.tox.2025.154157","url":null,"abstract":"<div><div>Many ToxCast assay endpoints can be mapped to molecular initiating events (MIEs) within the thyroid adverse outcome pathway (AOP) network. Herein, we provide a framework for interpretation of thyroid-relevant bioactivity data across MIEs. As a proof-of-concept, we used ToxCast data on the inhibition of deiodinase (DIO) enzymes, which convert thyroid hormones between active and inactive forms, and identified substances most likely to inhibit DIO enzymes. Data from 4 relevant cell-free <em>in vitro</em> assays are available for &gt; 2000 chemicals in single concentration screening and 327 chemicals in multi-concentration screening. We filtered to identify chemicals that demonstrated inhibition for each DIO enzyme less likely to be confounded by assay interference, refining the list of putatively active chemicals from 523 to 135. <em>In vitro</em> bioactivity data were then used to estimate administered equivalent doses (AEDs) using a novel high-throughput toxicokinetic (HTTK) model for <em>in vitro</em> to <em>in vivo</em> extrapolation (IVIVE) of dose. To consider potential thyroid-disrupting activity in an appropriate life-stage and dose context, we extended an existing human maternal-fetal HTTK model to allow for simulations involving the first trimester of pregnancy. For many chemicals, using modeled fetal tissue concentrations produced lower AED estimates than using modeled maternal plasma concentrations alone, at least partially due to conservative assumptions in our HTTK model of complete gestation. This extensible approach for MIE groups of thyroid-related bioactivity data from ToxCast may inform further screening or analyses for potential adverse outcomes during pregnancy and development.</div></div>","PeriodicalId":23159,"journal":{"name":"Toxicology","volume":"515 ","pages":"Article 154157"},"PeriodicalIF":4.8,"publicationDate":"2025-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hypoxia-inducible factor 1α modulates acrolein-induced cellular damage in bronchial epithelial cells 缺氧诱导因子1α调节丙烯醛诱导的支气管上皮细胞损伤
IF 4.8 3区 医学
Toxicology Pub Date : 2025-04-18 DOI: 10.1016/j.tox.2025.154158
Asha Ashraf , Bernd Zechmann , Erica D. Bruce
{"title":"Hypoxia-inducible factor 1α modulates acrolein-induced cellular damage in bronchial epithelial cells","authors":"Asha Ashraf ,&nbsp;Bernd Zechmann ,&nbsp;Erica D. Bruce","doi":"10.1016/j.tox.2025.154158","DOIUrl":"10.1016/j.tox.2025.154158","url":null,"abstract":"<div><div>Acrolein, a highly reactive α,β-unsaturated aldehyde, is a widespread environmental pollutant. It is generated during the incomplete combustion of materials such as tobacco smoke, petrol, coal, forest fires, and plastics, as well as from the overheating of frying oils. Acrolein is known to induce cellular damage and oxidative stress. This study investigates the critical role of hypoxia-inducible factor 1α (HIF-1α), which is a transcription factor required to regulate cell survival and angiogenesis, in protecting bronchial epithelial cells from acrolein-induced cytotoxicity and DNA damage under normoxic and hypoxic conditions. To our knowledge, no prior study has comprehensively evaluated the effects of HIF-1α on cellular responses to acrolein under normoxic and hypoxic conditions in vitro. Therefore, the goal of this study was to explore how silencing HIF-1α influences cellular responses to acrolein, and our study focused on changes in cytotoxicity, metabolic activity, DNA damage, and oxidative stress using the BEAS-2B cell line. We observed enhanced cell damage and reduced viability in cells exposed to acrolein when silenced with HIF-1α, particularly in hypoxic environments. While results indicate that silencing HIF-1α significantly increases cytotoxicity and DNA damage under hypoxia compared to normoxic conditions, oxidative stress indicator levels did not rise noticeably under hypoxia following HIF-1α silencing. This research warrants further investigation to indicate the importance of HIF-1α in adapting to environmental and hypoxic stressors, which are commonly found in chronic lung diseases and ischemic conditions.</div></div>","PeriodicalId":23159,"journal":{"name":"Toxicology","volume":"515 ","pages":"Article 154158"},"PeriodicalIF":4.8,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Translational insights into statin-induced myotoxicity: Differential impact of lipophilic and hydrophilic statins on iPSC-derived skeletal muscle cells from patients with familial hypercholesterolemia 他汀类药物诱导的肌毒性:亲脂性和亲水性他汀类药物对家族性高胆固醇血症患者ipsc来源的骨骼肌细胞的不同影响
IF 4.8 3区 医学
Toxicology Pub Date : 2025-04-18 DOI: 10.1016/j.tox.2025.154159
Raul Hernandes Bortolin , Felipe de Souza Leite , Andre Ducati Luchessi , Joyce Esposito , Igor Neves Barbosa , Renata Caroline Costa de Freitas , Abhijeet Rajendra Sonawane , Sasha Anna Singh , Elena Aikawa , Kayque Alves Telles-Silva , Thiago Dominguez Crespo Hirata , Antonia Pereira Rosa Neta , Ernesto Goulart , Luiz Carlos Caires-Júnior , Thais Maria da Mata Martins , Patrícia Semedo , Danielle de Paula Moreira , Michel Naslavsky , Andre Arpad Faludi , Rodrigo Marques Gonçalves , Mario Hiroyuki Hirata
{"title":"Translational insights into statin-induced myotoxicity: Differential impact of lipophilic and hydrophilic statins on iPSC-derived skeletal muscle cells from patients with familial hypercholesterolemia","authors":"Raul Hernandes Bortolin ,&nbsp;Felipe de Souza Leite ,&nbsp;Andre Ducati Luchessi ,&nbsp;Joyce Esposito ,&nbsp;Igor Neves Barbosa ,&nbsp;Renata Caroline Costa de Freitas ,&nbsp;Abhijeet Rajendra Sonawane ,&nbsp;Sasha Anna Singh ,&nbsp;Elena Aikawa ,&nbsp;Kayque Alves Telles-Silva ,&nbsp;Thiago Dominguez Crespo Hirata ,&nbsp;Antonia Pereira Rosa Neta ,&nbsp;Ernesto Goulart ,&nbsp;Luiz Carlos Caires-Júnior ,&nbsp;Thais Maria da Mata Martins ,&nbsp;Patrícia Semedo ,&nbsp;Danielle de Paula Moreira ,&nbsp;Michel Naslavsky ,&nbsp;Andre Arpad Faludi ,&nbsp;Rodrigo Marques Gonçalves ,&nbsp;Mario Hiroyuki Hirata","doi":"10.1016/j.tox.2025.154159","DOIUrl":"10.1016/j.tox.2025.154159","url":null,"abstract":"<div><div>Statins are highly effective cholesterol-lowering drugs that can reduce the risk of cardiovascular events. Statins are well tolerated but some patients experience statin-associated muscle symptoms (SAM) that can reduce adherence to therapy. We investigated molecular mechanisms statin-induced myotoxicity using induced pluripotent stem cells (iPSC)-derived skeletal muscle (SKgM) cells. iPSC-SKgM cells were obtained from patients with familial hypercholesterolemia (FH) experiencing SAM (n = 3) or not (nonSAM, n = 3). iPSC-SkgM cells were treated with atorvastatin and rosuvastatin (1 to 100 µM). Statin cytotoxicity was assessed by functional assays (cell death, mitochondrial damage, caspase 3/7 activity). iPSC-SkgM cells from SAM patients were more sensitive to atorvastatin toxicity than nonSAM cells (p &lt; 0.05), recapitulating the phenotype of SAM patients. Rosuvastatin was less cytotoxic than atorvastatin in iPSC-SkgM (p &lt; 0.05) from both SAM and nonSAM patients. Transcriptomic analysis revealed stronger effects on gene expression in SAM-derived iPSC-SKgM cells treated with atorvastatin (106 genes) than rosuvastatin (33 genes) compared to nonSAM cells. Enrichment analyses predicted associations of these genes with cell growth, muscle function, pro-inflammatory processes, and apoptosis. Proteomic analysis also showed more proteins differentially abundant in atorvastatin (61 proteins) than in rosuvastatin (26 proteins) treated cells. These proteins were related to cell biosynthetic process, signaling and communication, nucleic acid metabolism, and protein processing. In conclusion, atorvastatin has greater toxicity than rosuvastatin to iPSC-SKgM cells, an outcome exacerbated in FH patients who experienced SAM. Atorvastatin has stronger effects on expression of molecules involved in several signaling pathways suggesting novel molecular mechanisms of statin-induced myotoxicity.</div></div>","PeriodicalId":23159,"journal":{"name":"Toxicology","volume":"515 ","pages":"Article 154159"},"PeriodicalIF":4.8,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143870284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
DockTox: Targeting molecular initiating events in organ toxicity through molecular docking DockTox:通过分子对接靶向器官毒性的分子起始事件
IF 4.8 3区 医学
Toxicology Pub Date : 2025-04-17 DOI: 10.1016/j.tox.2025.154155
Rita Ortega-Vallbona , David Talavera-Cortés , Laureano E. Carpio , Jessica Coto Palacio , Alessandra Roncaglioni , Marina Garcia De Lomana , Domenico Gadaleta , Emilio Benfenati , Rafael Gozalbes , Eva Serrano-Candelas
{"title":"DockTox: Targeting molecular initiating events in organ toxicity through molecular docking","authors":"Rita Ortega-Vallbona ,&nbsp;David Talavera-Cortés ,&nbsp;Laureano E. Carpio ,&nbsp;Jessica Coto Palacio ,&nbsp;Alessandra Roncaglioni ,&nbsp;Marina Garcia De Lomana ,&nbsp;Domenico Gadaleta ,&nbsp;Emilio Benfenati ,&nbsp;Rafael Gozalbes ,&nbsp;Eva Serrano-Candelas","doi":"10.1016/j.tox.2025.154155","DOIUrl":"10.1016/j.tox.2025.154155","url":null,"abstract":"<div><div>Adverse Outcome Pathways (AOPs) in toxicology describe the sequence of key events from chemical exposure to adverse outcomes, facilitating the development of predictive models. The EU ONTOX project uses this framework to predict liver, developmental brain, and kidney toxicity without animal testing. Focusing on Molecular Initiating Events (MIEs), more concretely on the interaction of chemicals with key proteins, we have developed an automated workflow for docking small molecules onto over 20 pre-processed protein structures, implemented in the online tool DockTox. This tool generates conformers of small molecules, performs docking on MIE-associated proteins, and provides binding energy, interacting residues, and interaction maps. Additionally, it compares the interactions to a reference list of known ligands, producing an interaction fraction as an additional similarity measure. Evaluation of the docking workflow’s predictive performance on Peroxisome Proliferator-Activated Receptor α (PPARα) showed that interaction fraction values are more informative than binding energy alone for distinguishing binders from non-binders. This unique feature enhances the understanding of target protein interactions. DockTox supports the virtual screening of small molecules targeting MIE-associated proteins, offering insights into binding energies and interaction profiles. It is a valuable tool for anticipating adverse outcomes from chemical exposure in a tiered risk assessment approach.</div></div>","PeriodicalId":23159,"journal":{"name":"Toxicology","volume":"515 ","pages":"Article 154155"},"PeriodicalIF":4.8,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143870287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An In Vitro test battery using human whole blood for immunotoxicity hazard identification: Proof of concept studies with dexamethasone and benzo(a)pyrene 使用人全血进行免疫毒性危险鉴定的体外试验电池:地塞米松和苯并(a)芘的概念验证研究
IF 4.8 3区 医学
Toxicology Pub Date : 2025-04-14 DOI: 10.1016/j.tox.2025.154153
Victor J. Johnson , Michael I. Luster , Amber Edwards , Michael Kashon , Gary R. Burleson , Florence G. Burleson , Dori R. Germolec
{"title":"An In Vitro test battery using human whole blood for immunotoxicity hazard identification: Proof of concept studies with dexamethasone and benzo(a)pyrene","authors":"Victor J. Johnson ,&nbsp;Michael I. Luster ,&nbsp;Amber Edwards ,&nbsp;Michael Kashon ,&nbsp;Gary R. Burleson ,&nbsp;Florence G. Burleson ,&nbsp;Dori R. Germolec","doi":"10.1016/j.tox.2025.154153","DOIUrl":"10.1016/j.tox.2025.154153","url":null,"abstract":"<div><div>Immunotoxicity assessment is nearing a crossroads predicated on mounting pressure for reduction/replacement of animals in toxicology. This has fueled the development of alternative New Approach Methodologies (NAMs) for hazard identification. This work details a comprehensive human whole blood NAM battery for immunotoxicity testing. The test system is a closed tube culture containing whole blood diluted 1:3 in culture media with or without an immune stimulant, anti-CD3/CD28 or viral peptide pool. Model immunotoxicants dexamethasone (DEX; 0 – 1.94 μM) and benzo(<em>a</em>)pyrene [B(<em>a</em>)P; 0–6.3 μM], were added to the test system for 24 hours. Immune cells were identified and counted by flow cytometric immunophenotyping and assessed for natural killer (NK) cell activity and T cell activation. Supernatants were interrogated for proinflammatory cytokine concentrations. <em>In vitro</em> treatment with DEX resulted in concentration-dependent suppression of cytokine production, NK cell activity, and T cell activation induced by anti-CD3/CD28, as well as viral-induced cytokine production. B(<em>a</em>)P caused suppression of cytokine production and a nonsignificant reduction in T cell activation but did not impact NK cell activity, however, immunosuppression by B(<em>a</em>)P only occurred following metabolic activation by S9 fraction enzymes. Advantages of this NAM battery include assessment of adaptive immunity and direct translation of immunotoxicity to viral host resistance. These results provide evidence of <em>in vitro</em> immunotoxicity that reflect known outcomes from <em>in vivo</em> studies. This multi-endpoint human whole blood NAM battery should be useful for screening compounds for immunotoxicity hazard identification without reliance on animal systems for increased translatability to humans.</div></div>","PeriodicalId":23159,"journal":{"name":"Toxicology","volume":"515 ","pages":"Article 154153"},"PeriodicalIF":4.8,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143870286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Glutathione attenuates diesel exhaust-induced lung epithelial injury via NF-κB/Nrf2/GPX4-mediated ferroptosis 谷胱甘肽通过 NF-κB/Nrf2/GPX4 介导的铁氧化作用减轻柴油废气诱导的肺上皮损伤
IF 4.8 3区 医学
Toxicology Pub Date : 2025-04-14 DOI: 10.1016/j.tox.2025.154154
Ekta Nagar , Naresh Singh , Neeru Saini , Naveen Arora
{"title":"Glutathione attenuates diesel exhaust-induced lung epithelial injury via NF-κB/Nrf2/GPX4-mediated ferroptosis","authors":"Ekta Nagar ,&nbsp;Naresh Singh ,&nbsp;Neeru Saini ,&nbsp;Naveen Arora","doi":"10.1016/j.tox.2025.154154","DOIUrl":"10.1016/j.tox.2025.154154","url":null,"abstract":"<div><div>Diesel exhaust (DE) emissions pose a significant threat to public health. This study linked DE-mediated reactive oxygen species (ROS) and ferroptosis with lung epithelial disruption, also the protective potential of exogenous glutathione (GSH) administration was investigated. C57BL/6 mice were divided into three groups: filtered air (control), DE exposed, and DE+GSH (administered intranasally on alternate days). Airway hyperresponsiveness (AHR), lung tissues, and bronchoalveolar lavage fluid (BALF) were used for analysis. DE exposure significantly impaired lung function parameters as shown by AHR. Elevated ROS depleted the GSH/GSSG ratio and suppressed Nrf2 activity, disrupting antioxidant defense mechanisms, which were restored by GSH administration. DE-induced ROS acted as a key driver of ferroptosis, characterized by suppressed SLC7411 expression thereby decreased GSH synthesis and GPX-4 activity, inducing lipid peroxidation. Ferroptosis was significantly mitigated by increased GSH pool, which restored GPX-4 levels and reduced lipid peroxidation. Concurrently, DE induced ROS promoted DNA damage and apoptosis in lung epithelial cells wherein GSH treatment preserved cell survival in DE exposed mice. The heightened DE-associated ROS further amplified inflammation, as shown by increased cytokines (TNF-α, IL-6, TSLP, IL-33) and P-NF-κB activation. Activated inflammatory cascade disrupted tight junction proteins (claudins, occludin), resulted in weakened epithelial barrier and increased permeability. Lung barrier disruption was evidenced by transmission electron microscopy and immunohistochemistry, corroborated with elevated albumin levels. GSH effectively restored tight junction integrity and preserved barrier function in DE+GSH mice lungs. In conclusion, DE-induced oxidative stress and ferroptosis-triggered inflammation compromised epithelial barrier promoting lung injury. Exogenous GSH administration showed potential in restoring DE-associated lung damage.</div></div>","PeriodicalId":23159,"journal":{"name":"Toxicology","volume":"515 ","pages":"Article 154154"},"PeriodicalIF":4.8,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143874558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of co-exposure to microplastics and perfluorooctanoic acid on the Caco-2 cells 微塑料和全氟辛酸共同暴露对Caco-2细胞的影响
IF 4.8 3区 医学
Toxicology Pub Date : 2025-04-11 DOI: 10.1016/j.tox.2025.154152
Xingyu Zou , Mengjun Pan , Yue Liu , Shuai Wang , Hongye Xu , Xiaoqin Chu
{"title":"Effects of co-exposure to microplastics and perfluorooctanoic acid on the Caco-2 cells","authors":"Xingyu Zou ,&nbsp;Mengjun Pan ,&nbsp;Yue Liu ,&nbsp;Shuai Wang ,&nbsp;Hongye Xu ,&nbsp;Xiaoqin Chu","doi":"10.1016/j.tox.2025.154152","DOIUrl":"10.1016/j.tox.2025.154152","url":null,"abstract":"<div><div>As plastics are produced and used, humans are inevitably exposed to microplastics (MPs) on a daily basis. The pollution of MPs has aroused widespread human concern. Perfluorooctanoic acid (PFOA), a persistent organic pollutant (POP), can be adsorbed by microplastics and may exacerbate human health hazards. In this study, we investigated the effects of co-exposure of PET MPs and PFOA on the human intestinal tract in terms of both cytotoxicity and intestinal barrier through in vitro experiments. The results showed that PFOA induced cellular oxidative stress, mitochondrial dysfunction exerted cytotoxic effects, and inhibited tight junction (TJ) protein expression causing intestinal barrier damage. PET MPs can synergize with PFOA to exacerbate the deleterious effects on the intestinal tract by decreasing cell membrane permeability to increase PFOA accumulation in the cell and enhancing the ability of PFOA to inhibit zonula occludens-1 (ZO-1) proteins.</div></div>","PeriodicalId":23159,"journal":{"name":"Toxicology","volume":"515 ","pages":"Article 154152"},"PeriodicalIF":4.8,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exposure to submicroplastics promotes the progression of nonalcoholic fatty liver disease in ApoE-deficient mice 暴露于亚微塑料促进apoe缺陷小鼠非酒精性脂肪肝疾病的进展
IF 4.8 3区 医学
Toxicology Pub Date : 2025-04-11 DOI: 10.1016/j.tox.2025.154137
Qingwen Li , Xuan Niu , Yuli Cai , Lili Li , Zhongyuan Xia
{"title":"Exposure to submicroplastics promotes the progression of nonalcoholic fatty liver disease in ApoE-deficient mice","authors":"Qingwen Li ,&nbsp;Xuan Niu ,&nbsp;Yuli Cai ,&nbsp;Lili Li ,&nbsp;Zhongyuan Xia","doi":"10.1016/j.tox.2025.154137","DOIUrl":"10.1016/j.tox.2025.154137","url":null,"abstract":"<div><div>Microplastics (MPs) pose emerging threats to human health, with growing concerns about liver toxicity and other harmful effects from plastic particles. While aquatic species exhibit hepatic vulnerability to micro/nanoplastics, the role of submicroplastics (100 nm-1 μm) in mammalian non-alcoholic fatty liver disease (NAFLD) progression remains unclear. We investigated the effects of a 12-week exposure to 0.5 μm polystyrene MPs (submicroplastics) in drinking water, administering this to ApoE-deficient mice fed either a chow diet (CD) or a Western diet (WD). Submicroplastics accumulated predominantly in the liver and were excreted in the feces. Histologically, submicroplastics significantly increased NAFLD activity scores, hepatic steatosis (Oil Red O-positive area), and fibrosis (Masson-positive area), with maximal severity in the WD+MPs group. Also, the MPs exposure group had increases in positive areas for F4/80 and inflammatory markers TNF-α, IL-1β and IL-6 expression under both diets. Concurrently, submicroplastics inhibited antioxidant defenses by lowering levels of superoxide dismutase and glutathione, while also increasing the lipid peroxidation marker malondialdehyde. WD-fed mice exhibited pronounced MPs-induced lipid dysregulation, including elevated hepatic triglycerides, total cholesterol, and free fatty acids (FAs). Mechanistically, submicroplastics upregulated FA synthesis regulators (ACC, FASN, SREBP1) while downregulating FA oxidation mediators (CPT1A, ACOX1, PPARα) in the livers under a WD. Our findings demonstrate that chronic submicroplastics-exposure exacerbates the progression of NAFLD in ApoE-deficient mice by disturbing lipid metabolism, enhancing oxidative stress, and amplifying inflammatory responses. This study provides experimental evidence linking environmental plastic pollution to accelerated metabolic liver disease, thereby highlighting the urgent need for plastic exposure control strategies.</div></div>","PeriodicalId":23159,"journal":{"name":"Toxicology","volume":"515 ","pages":"Article 154137"},"PeriodicalIF":4.8,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143848465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-content screening morphological analysis to evaluate hepatic apoptosis induced by plant alkaloids in a Chang cell model 植物生物碱诱导肝细胞凋亡的高含量筛选形态学分析
IF 4.8 3区 医学
Toxicology Pub Date : 2025-04-11 DOI: 10.1016/j.tox.2025.154140
Su Been Park, Hwa Young Choi, Young Eun Park, Sihyeon Jang, Hyang Sook Chun
{"title":"High-content screening morphological analysis to evaluate hepatic apoptosis induced by plant alkaloids in a Chang cell model","authors":"Su Been Park,&nbsp;Hwa Young Choi,&nbsp;Young Eun Park,&nbsp;Sihyeon Jang,&nbsp;Hyang Sook Chun","doi":"10.1016/j.tox.2025.154140","DOIUrl":"10.1016/j.tox.2025.154140","url":null,"abstract":"<div><div>As interest in plant-derived compounds and their application in the pharmaceutical and functional food industries has increased, the rapid detection of chemical toxicity has become increasingly important for developing safe products. High-content screening (HCS) can quantify cellular and organelle morphological changes through image analysis; however, most HCS studies on apoptosis, a key toxicological event, have focused on the expression of apoptosis-related genes or proteins. In this study, we aimed to verify whether apoptosis can be detected solely based on cellular morphological changes. Chang cells were treated with staurosporine (STS), a well-known apoptosis inducer, and the morphological changes in the cells were quantified using HCS assays. The correlation between these HCS morphological descriptors and apoptosis rates measured using flow cytometry was determined. Chang cells were also treated with several plant-derived alkaloids known to induce apoptosis, and the same process was performed. The correlation coefficients, which were used to evaluate the correlation between HCS descriptors and apoptosis rates after STS treatment, ranged from 0.64 to 0.98, with 13 descriptors showing significant correlations. In contrast, the highest correlation coefficients between HCS descriptors and apoptosis rates after treatment with 1 of the 12 alkaloids investigated were determined to be 0.75 (at 10 μg/ml) and 0.49 (at 100 μg/ml). The apoptosis-related morphological changes induced by STS and alkaloids were observed using confocal microscopy. The present study demonstrates that HCS assays can detect apoptosis solely based on cellular morphological changes, providing a potential tool for rapid toxicity screening in early product development.</div></div>","PeriodicalId":23159,"journal":{"name":"Toxicology","volume":"515 ","pages":"Article 154140"},"PeriodicalIF":4.8,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Corrigendum to “Bioinformatics identification of shared signaling pathways and core targets linking Benzo[a]pyrene exposure to HCC progression” [Toxicology 514 (2025) 154129] “连接苯并[a]芘暴露与HCC进展的共享信号通路和核心靶点的生物信息学鉴定”[毒理学514(2025)154129]的勘误表
IF 4.8 3区 医学
Toxicology Pub Date : 2025-04-10 DOI: 10.1016/j.tox.2025.154149
Yong-Le Li , Rong He , Meng Tang , Jing-Yi Lan , Guo-Yang Liu , Li-He Jiang
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