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Repeated exposure to eucalyptus wood smoke alters pulmonary gene and metabolic profiles in male Long-Evans rats. 重复暴露于桉木烟雾会改变雄性 Long-Evans 大鼠的肺部基因和新陈代谢特征。
IF 3.8 3区 医学
Toxicological Sciences Pub Date : 2024-05-28 DOI: 10.1093/toxsci/kfae040
Samuel J Cochran, Katelyn Dunigan-Russell, Grace M Hutton, Helen Nguyen, Mette C Schladweiler, Dean P Jones, Wanda C Williams, Anna A Fisher, M Ian Gilmour, Janice A Dye, M Ryan Smith, Colette N Miller, Kymberly M Gowdy
{"title":"Repeated exposure to eucalyptus wood smoke alters pulmonary gene and metabolic profiles in male Long-Evans rats.","authors":"Samuel J Cochran, Katelyn Dunigan-Russell, Grace M Hutton, Helen Nguyen, Mette C Schladweiler, Dean P Jones, Wanda C Williams, Anna A Fisher, M Ian Gilmour, Janice A Dye, M Ryan Smith, Colette N Miller, Kymberly M Gowdy","doi":"10.1093/toxsci/kfae040","DOIUrl":"10.1093/toxsci/kfae040","url":null,"abstract":"<p><p>Exposure to wildfire smoke is associated with both acute and chronic cardiopulmonary illnesses, which are of special concern for wildland firefighters who experience repeated exposure to wood smoke. It is necessary to better understand the underlying pathophysiology by which wood smoke exposure increases pulmonary disease burdens in this population. We hypothesize that wood smoke exposure produces pulmonary dysfunction, lung inflammation, and gene expression profiles associated with future pulmonary complications. Male Long-Evans rats were intermittently exposed to smoldering eucalyptus wood smoke at 2 concentrations, low (11.0 ± 1.89 mg/m3) and high (23.7 ± 0.077 mg/m3), over a 2-week period. Whole-body plethysmography was measured intermittently throughout. Lung tissue and lavage fluid were collected 24 h after the final exposure for transcriptomics and metabolomics. Increasing smoke exposure upregulated neutrophils and select cytokines in the bronchoalveolar lavage fluid. In total, 3446 genes were differentially expressed in the lungs of rats in the high smoke exposure and only 1 gene in the low smoke exposure (Cd151). Genes altered in the high smoke group reflected changes to the Eukaryotic Initiation Factor 2 stress and oxidative stress responses, which mirrored metabolomics analyses. xMWAS-integrated analysis revealed that smoke exposure significantly altered pathways associated with oxidative stress, lung morphogenesis, and tumor proliferation pathways. These results indicate that intermittent, 2-week exposure to eucalyptus wood smoke leads to transcriptomic and metabolic changes in the lung that may predict future lung disease development. Collectively, these findings provide insight into cellular signaling pathways that may contribute to the chronic pulmonary conditions observed in wildland firefighters.</p>","PeriodicalId":23178,"journal":{"name":"Toxicological Sciences","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11131017/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140307029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pluripotent stem cells for target organ developmental toxicity testing. 用于靶器官发育毒性测试的多能干细胞。
IF 3.8 3区 医学
Toxicological Sciences Pub Date : 2024-05-28 DOI: 10.1093/toxsci/kfae037
Xian Wu, Yichang Chen, Anna Kreutz, Brian Silver, Erik J Tokar
{"title":"Pluripotent stem cells for target organ developmental toxicity testing.","authors":"Xian Wu, Yichang Chen, Anna Kreutz, Brian Silver, Erik J Tokar","doi":"10.1093/toxsci/kfae037","DOIUrl":"10.1093/toxsci/kfae037","url":null,"abstract":"<p><p>Prenatal developmental toxicity research focuses on understanding the potential adverse effects of environmental agents, drugs, and chemicals on the development of embryos and fetuses. Traditional methods involve animal testing, but ethical concerns and the need for human-relevant models have prompted the exploration of alternatives. Pluripotent stem cells (PSCs) are versatile cells with the unique ability to differentiate into any cell type, serving as a foundational tool for studying human development. Two-dimensional (2D) PSC models are often chosen for their ease of use and reproducibility for high-throughput screening. However, they lack the complexity of an in vivo environment. Alternatively, three-dimensional (3D) PSC models, such as organoids, offer tissue architecture and intercellular communication more reminiscent of in vivo conditions. However, they are complicated to produce and analyze, usually requiring advanced and expensive techniques. This review discusses recent advances in the use of human PSCs differentiated into brain and heart lineages and emerging tools and methods that can be combined with PSCs to help address important scientific questions in the area of developmental toxicology. These advancements and new approach methods align with the push for more relevant and predictive developmental toxicity assessment, combining innovative techniques with organoid models to advance regulatory decision-making.</p>","PeriodicalId":23178,"journal":{"name":"Toxicological Sciences","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11131012/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140319224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Inhalation of particulate matter containing environmentally persistent free radicals induces endothelial dysfunction mediated via AhR activation at the air-blood interface. 吸入含有环境持久性自由基的微粒物质会通过空气-血液界面的 AhR 激活诱导内皮功能障碍。
IF 3.8 3区 医学
Toxicological Sciences Pub Date : 2024-05-28 DOI: 10.1093/toxsci/kfae007
Ankit Aryal, Ashlyn C Harmon, Kurt J Varner, Alexandra Noël, Stephania A Cormier, Divine B Nde, Peter Mottram, Jemiah Maxie, Tammy R Dugas
{"title":"Inhalation of particulate matter containing environmentally persistent free radicals induces endothelial dysfunction mediated via AhR activation at the air-blood interface.","authors":"Ankit Aryal, Ashlyn C Harmon, Kurt J Varner, Alexandra Noël, Stephania A Cormier, Divine B Nde, Peter Mottram, Jemiah Maxie, Tammy R Dugas","doi":"10.1093/toxsci/kfae007","DOIUrl":"10.1093/toxsci/kfae007","url":null,"abstract":"<p><p>Particulate matter (PM) containing environmentally persistent free radicals (EPFR) is formed by the incomplete combustion of organic wastes, resulting in the chemisorption of pollutants to the surface of PM containing redox-active transition metals. In prior studies in mice, EPFR inhalation impaired endothelium-dependent vasodilation. These findings were associated with aryl hydrocarbon receptor (AhR) activation in the alveolar type-II (AT-II) cells that form the air-blood interface in the lung. We thus hypothesized that AhR activation in AT-II cells promotes the systemic release of mediators that promote endothelium dysfunction peripheral to the lung. To test our hypothesis, we knocked down AhR in AT-II cells of male and female mice and exposed them to 280 µg/m3 EPFR lo (2.7e + 16 radicals/g) or EPFR (5.5e + 17 radicals/g) compared with filtered air for 4 h/day for 1 day or 5 days. AT-II-AhR activation-induced EPFR-mediated endothelial dysfunction, reducing endothelium-dependent vasorelaxation by 59%, and eNOS expression by 50%. It also increased endothelin-1 mRNA levels in the lungs and peptide levels in the plasma in a paracrine fashion, along with soluble vascular cell adhesion molecule-1 and iNOS mRNA expression, possibly via NF-kB activation. Finally, AhR-dependent increases in antioxidant response signaling, coupled to increased levels of 3-nitrotyrosine in the lungs of EPFR-exposed littermate control but not AT-II AhR KO mice suggested that ATII-specific AhR activation promotes oxidative and nitrative stress. Thus, AhR activation at the air-blood interface mediates endothelial dysfunction observed peripheral to the lung, potentially via release of systemic mediators.</p>","PeriodicalId":23178,"journal":{"name":"Toxicological Sciences","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139681591","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
Development of a human liver microphysiological coculture system for higher throughput chemical safety assessment. 开发用于高通量化学品安全评估的人类肝脏微生理共培养系统。
IF 3.8 3区 医学
Toxicological Sciences Pub Date : 2024-05-28 DOI: 10.1093/toxsci/kfae018
Blanche C Ip, Samantha J Madnick, Sophia Zheng, Tessa C A van Tongeren, Susan J Hall, Hui Li, Suzanne Martin, Sandrine Spriggs, Paul Carmichael, Wei Chen, David Ames, Lori A Breitweiser, Heather E Pence, Andrew J Bowling, Kamin J Johnson, Richard Cubberley, Jeffrey R Morgan, Kim Boekelheide
{"title":"Development of a human liver microphysiological coculture system for higher throughput chemical safety assessment.","authors":"Blanche C Ip, Samantha J Madnick, Sophia Zheng, Tessa C A van Tongeren, Susan J Hall, Hui Li, Suzanne Martin, Sandrine Spriggs, Paul Carmichael, Wei Chen, David Ames, Lori A Breitweiser, Heather E Pence, Andrew J Bowling, Kamin J Johnson, Richard Cubberley, Jeffrey R Morgan, Kim Boekelheide","doi":"10.1093/toxsci/kfae018","DOIUrl":"10.1093/toxsci/kfae018","url":null,"abstract":"<p><p>Chemicals in the systemic circulation can undergo hepatic xenobiotic metabolism, generate metabolites, and exhibit altered toxicity compared with their parent compounds. This article describes a 2-chamber liver-organ coculture model in a higher-throughput 96-well format for the determination of toxicity on target tissues in the presence of physiologically relevant human liver metabolism. This 2-chamber system is a hydrogel formed within each well consisting of a central well (target tissue) and an outer ring-shaped trough (human liver tissue). The target tissue chamber can be configured to accommodate a three-dimensional (3D) spheroid-shaped microtissue, or a 2-dimensional (2D) cell monolayer. Culture medium and compounds freely diffuse between the 2 chambers. Human-differentiated HepaRG liver cells are used to form the 3D human liver microtissues, which displayed robust protein expression of liver biomarkers (albumin, asialoglycoprotein receptor, Phase I cytochrome P450 [CYP3A4] enzyme, multidrug resistance-associated protein 2 transporter, and glycogen), and exhibited Phase I/II enzyme activities over the course of 17 days. Histological and ultrastructural analyses confirmed that the HepaRG microtissues presented a differentiated hepatocyte phenotype, including abundant mitochondria, endoplasmic reticulum, and bile canaliculi. Liver microtissue zonation characteristics could be easily modulated by maturation in different media supplements. Furthermore, our proof-of-concept study demonstrated the efficacy of this coculture model in evaluating testosterone-mediated androgen receptor responses in the presence of human liver metabolism. This liver-organ coculture system provides a practical, higher-throughput testing platform for metabolism-dependent bioactivity assessment of drugs/chemicals to better recapitulate the biological effects and potential toxicity of human exposures.</p>","PeriodicalId":23178,"journal":{"name":"Toxicological Sciences","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11131024/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139713143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Particulate threats: aryl hydrocarbon receptor, alveolar epithelium, environmentally persistent free radicals, and endothelial dysfunction. 颗粒威胁:芳基烃受体、肺泡上皮、环境持久性自由基和内皮功能障碍。
IF 3.8 3区 医学
Toxicological Sciences Pub Date : 2024-05-28 DOI: 10.1093/toxsci/kfae036
Kymberly M Gowdy, Jonathan Shannahan
{"title":"Particulate threats: aryl hydrocarbon receptor, alveolar epithelium, environmentally persistent free radicals, and endothelial dysfunction.","authors":"Kymberly M Gowdy, Jonathan Shannahan","doi":"10.1093/toxsci/kfae036","DOIUrl":"10.1093/toxsci/kfae036","url":null,"abstract":"","PeriodicalId":23178,"journal":{"name":"Toxicological Sciences","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141157737","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
Organophosphate ester flame retardants and plasticizers affect the phenotype and function of HepG2 liver cells. 有机磷酸酯类阻燃剂和增塑剂会影响 HepG2 肝细胞的表型和功能。
IF 3.4 3区 医学
Toxicological Sciences Pub Date : 2024-05-28 DOI: 10.1093/toxsci/kfae034
Dongwei Yu, Barbara F Hales, Bernard Robaire
{"title":"Organophosphate ester flame retardants and plasticizers affect the phenotype and function of HepG2 liver cells.","authors":"Dongwei Yu, Barbara F Hales, Bernard Robaire","doi":"10.1093/toxsci/kfae034","DOIUrl":"10.1093/toxsci/kfae034","url":null,"abstract":"<p><p>Exposure to the organophosphate esters (OPEs), used as flame retardants and plasticizers, is associated with a variety of adverse health effects including an increase in the incidence of fatty liver diseases. The goal of this study was to investigate the effects of six OPEs, all detected in Canadian house dust, on the phenotype and function of HepG2 liver cells. We used high-content imaging to investigate the effects of these OPEs on cell survival, mitochondria, oxidative stress, lipid droplets, and lysosomes. Effects on the autophagy/lipophagy pathway were evaluated using confocal microscopy. The triaryl OPEs (isopropylated triphenylphosphate [IPPP], tris(methylphenyl) phosphate [TMPP], and triphenyl phosphate [TPHP]) were more cytotoxic than non-triaryl OPEs (tris(2-butoxyethyl) phosphate [TBOEP], tris(1-chloro-2-propyl) phosphate [TCIPP], and tris(1,3-dichloro-2-propyl) phosphate [TDCIPP]). Exposure to most OPEs increased total mitochondria, reduced reactive oxygen species, and increased total lipid droplet areas and lysosomal intensity. Potency ranking was done using the lowest benchmark concentration/administered equivalent dose method and toxicological prioritization index analyses to integrate all phenotypic endpoints. IPPP, TBOEP, and TPHP ranked as the most potent OPEs, whereas TMPP, TCIPP, and TDCIPP were relatively less bioactive. Confocal microscopic analysis demonstrated that IPPP reduced the colocalization of lipid droplets (PLIN2), lysosomes (LAMP1), and autophagosomes (p62), disrupting autophagy. In contrast, TBOEP rescued cells from bafilomycin A1-induced inhibition of autophagy and/or increased autophagic flux. Together, these data demonstrate that OPEs have adverse effects on HepG2 cells. Further, OPE-induced dysregulation of autophagy may contribute to the association between OPE exposure and adverse effects on liver lipid homeostasis.</p>","PeriodicalId":23178,"journal":{"name":"Toxicological Sciences","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11131028/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140190147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prenatal prednisone exposure impacts liver development and function in fetal mice and its characteristics. 产前泼尼松暴露影响胎鼠肝脏发育和功能及其特征
IF 3.8 3区 医学
Toxicological Sciences Pub Date : 2024-04-29 DOI: 10.1093/toxsci/kfae027
Yongguo Dai, Yu Peng, Zhengjie Lu, Tongyun Mao, Kaiqi Chen, Xiaoqian Lu, Kexin Liu, Xinli Zhou, Wen Hu, Hui Wang
{"title":"Prenatal prednisone exposure impacts liver development and function in fetal mice and its characteristics.","authors":"Yongguo Dai, Yu Peng, Zhengjie Lu, Tongyun Mao, Kaiqi Chen, Xiaoqian Lu, Kexin Liu, Xinli Zhou, Wen Hu, Hui Wang","doi":"10.1093/toxsci/kfae027","DOIUrl":"10.1093/toxsci/kfae027","url":null,"abstract":"<p><p>Prednisone, a widely used glucocorticoid drug in human and veterinary medicine, has been reported to cause developmental toxicity. However, systematic studies about the effect of prednisone on fetal liver development are still unclear. We investigated the potential effects of maternal exposure to clinically equivalent doses of prednisone during different gestational stages on cell proliferation and apoptosis, cell differentiation, glucose and lipid metabolism, and hematopoiesis in the liver of fetal mice, and explored the potential mechanisms. Results showed that prenatal prednisone exposure (PPE) could suppress cell proliferation, inhibit hepatocyte differentiation, and promote cholangiocyte differentiation in the fetal liver. Meanwhile, PPE could result in the enhancement of glyconeogenesis and bile acid synthesis and the inhibition of fatty acid β-oxidation and hematopoiesis in the fetal liver. Further analysis found that PPE-induced alterations in liver development had obvious stage and sex differences. Overall, the alteration in fetal liver development and function induced by PPE was most pronounced during the whole pregnancy (GD0-18), and the males were relatively more affected than the females. Additionally, fetal hepatic insulin-like growth factor 1 (IGF1) signaling pathway was inhibited by PPE. In conclusion, PPE could impact fetal liver development and multiple functions, and these alterations might be partially related to the inhibition of IGF1 signaling pathway.</p>","PeriodicalId":23178,"journal":{"name":"Toxicological Sciences","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140029089","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
A critical review of advances in tumor metabolism abnormalities induced by nitrosamine disinfection by-products in drinking water. 关于饮用水中亚硝胺消毒副产物诱发肿瘤代谢异常的研究进展综述。
IF 3.8 3区 医学
Toxicological Sciences Pub Date : 2024-04-29 DOI: 10.1093/toxsci/kfae012
Mingjun Sun, Weitao Shen, Xinxin Guo, Yinghao Liao, Yang Huang, Mohan Hu, Ping Ye, Ran Liu
{"title":"A critical review of advances in tumor metabolism abnormalities induced by nitrosamine disinfection by-products in drinking water.","authors":"Mingjun Sun, Weitao Shen, Xinxin Guo, Yinghao Liao, Yang Huang, Mohan Hu, Ping Ye, Ran Liu","doi":"10.1093/toxsci/kfae012","DOIUrl":"10.1093/toxsci/kfae012","url":null,"abstract":"<p><p>Intensified sanitation practices amid the recent severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) outbreak might result in the increased release of chloramine disinfectants into surface water, significantly promoting the formation of nitrosamine disinfection by-products (DBPs) in drinking water. Unfortunately, these nitrosamine DBPs exhibit significant genotoxic, carcinogenic, and mutagenic properties, whereas chlorinating disinfectants remain in global practice. The current review provides valuable insights into the occurrence, identification, contamination status, exposure limits, and toxicity of the new unregulated disinfection by-products (nitrosamine DBPs) in drinking water. As a result, concentrations of nitrosamine DBPs far exceed allowable limits in drinking water, and prolonged exposure has the potential to cause metabolic disorders, a critical step in tumor initiation and progression. Importantly, based on recent research, we have concluded the role of nitrosamines DBPs in different metabolic pathways. Remarkably, nitrosamine DBPs can induce chronic inflammation and initiate tumors by activating sphingolipid and polyunsaturated fatty acid metabolism. Regarding amino acid and nucleotide metabolism, nitrosamine DBPs can inhibit tryptophan metabolism and de novo nucleotide synthesis. Moreover, inhibition of de novo nucleotide synthesis fails to repair DNA damage induced by nitrosamines. Additionally, the accumulation of lactate induced by nitrosamine DBPs may act as a pivotal signaling molecule in communication within the tumor microenvironment. However, with the advancement of tumor metabolomics, understanding the role of nitrosamine DBPs in causing cancer by inducing metabolic abnormalities significantly lags behind, and specific mechanisms of toxic effects are not clearly defined. Urgently, further studies exploring this promising area are needed.</p>","PeriodicalId":23178,"journal":{"name":"Toxicological Sciences","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139642999","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
Evaluation of organophosphorus pesticide tyrosine adducts for postmortem change by human serum albumin with liquid chromatography quadrupole Orbitrap mass spectrometry. 用液相色谱四极杆轨道质谱法评估人血清白蛋白中有机磷农药酪氨酸加合物在死后的变化。
IF 3.8 3区 医学
Toxicological Sciences Pub Date : 2024-04-29 DOI: 10.1093/toxsci/kfae023
Yoshikazu Yamagishi, Sayaka Nagasawa, Hirotaro Iwase, Yasumitsu Ogra
{"title":"Evaluation of organophosphorus pesticide tyrosine adducts for postmortem change by human serum albumin with liquid chromatography quadrupole Orbitrap mass spectrometry.","authors":"Yoshikazu Yamagishi, Sayaka Nagasawa, Hirotaro Iwase, Yasumitsu Ogra","doi":"10.1093/toxsci/kfae023","DOIUrl":"10.1093/toxsci/kfae023","url":null,"abstract":"<p><p>Organophosphorus pesticides (OPPs) having a phosphate ester moiety, such as malathion (MA) and methidathion (DMTP), are widely used and have been detected in many fatal cases of accidental exposure or suicide in Japan. In forensic toxicology, the accurate determination of blood OPP concentration is mandatory to prove death by OPP poisoning. However, fatal pesticide concentration in blood at autopsy varies depending on the circumstances surrounding the dead body. In this study, we found that 16 OPPs were degraded by human serum albumin (HSA) in a temperature-dependent fashion. The mechanism underlying MA, DMTP, azinphos-methyl, etrimfos, fenthion (MPP), pirimiphos-methyl, (E)-dimethylvinphos, (Z)-dimethylvinphos, vamidothion, edifenphos (EDDP), fosthiazate, and pyraclofos degradation involves the formation of adducts with tyrosine residues in HSA. The mass spectra obtained by liquid chromatography quadrupole Orbitrap mass spectrometry revealed that phosphate ester amino acid adducts such as Y-adduct1, Y-adduct2, Y-adduct3, Y-adduct4, and Y-adduct5 were formed in HSA solution incubated with OPPs. These results indicate that the 16 OPPs are postmortem changed by HSA. The detection of phosphate ester amino acid adducts such as Y-adduct1, Y-adduct2, Y-adduct3, Y-adduct4, and Y-adduct5, instead of MA, DMTP, azinphos-methyl, etrimfos, MPP, pirimiphos-methyl, (E)-dimethylvinphos, (Z)-dimethylvinphos, vamidothion, EDDP, fosthiazate, and pyraclofos per se, may be used to determine death by these OPPs poisoning.</p>","PeriodicalId":23178,"journal":{"name":"Toxicological Sciences","volume":null,"pages":null},"PeriodicalIF":3.8,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139898284","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
A whale of a tale: whale cells evade the driving mechanism for hexavalent chromium-induced chromosome instability. 鲸鱼的故事:鲸鱼细胞逃避六价铬诱导染色体不稳定的驱动机制。
IF 3.4 3区 医学
Toxicological Sciences Pub Date : 2024-04-29 DOI: 10.1093/toxsci/kfae030
Haiyan Lu, Jennifer H Toyoda, Sandra S Wise, Cynthia L Browning, Rachel M Speer, Tayler J Croom-Pérez, Alicia Bolt, Idoia Meaza, John Pierce Wise
{"title":"A whale of a tale: whale cells evade the driving mechanism for hexavalent chromium-induced chromosome instability.","authors":"Haiyan Lu, Jennifer H Toyoda, Sandra S Wise, Cynthia L Browning, Rachel M Speer, Tayler J Croom-Pérez, Alicia Bolt, Idoia Meaza, John Pierce Wise","doi":"10.1093/toxsci/kfae030","DOIUrl":"10.1093/toxsci/kfae030","url":null,"abstract":"<p><p>Chromosome instability, a hallmark of lung cancer, is a driving mechanism for hexavalent chromium [Cr(VI)] carcinogenesis in humans. Cr(VI) induces structural and numerical chromosome instability in human lung cells by inducing DNA double-strand breaks and inhibiting homologous recombination repair and causing spindle assembly checkpoint (SAC) bypass and centrosome amplification. Great whales are long-lived species with long-term exposures to Cr(VI) and accumulate Cr in their tissue, but exhibit a low incidence of cancer. Data show Cr(VI) induces fewer chromosome aberrations in whale cells after acute Cr(VI) exposure suggesting whale cells can evade Cr(VI)-induced chromosome instability. However, it is unknown if whales can evade Cr(VI)-induced chromosome instability. Thus, we tested the hypothesis that whale cells resist Cr(VI)-induced loss of homologous recombination repair activity and increased SAC bypass and centrosome amplification. We found Cr(VI) induces similar amounts of DNA double-strand breaks after acute (24 h) and prolonged (120 h) exposures in whale lung cells, but does not inhibit homologous recombination repair, SAC bypass, or centrosome amplification, and does not induce chromosome instability. These data indicate whale lung cells resist Cr(VI)-induced chromosome instability, the major driver for Cr(VI) carcinogenesis at a cellular level, consistent with observations that whales are resistant to cancer.</p>","PeriodicalId":23178,"journal":{"name":"Toxicological Sciences","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11057468/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140307027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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