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Bag2 protects against doxorubicin-induced cardiotoxicity by maintaining Pink1-mediated mitophagy Bag2 通过维持 Pink1 介导的有丝分裂来防止多柔比星诱导的心脏毒性。
IF 4.8 3区 医学 Q1 PHARMACOLOGY & PHARMACY Pub Date : 2024-10-22 DOI: 10.1016/j.tox.2024.153980
Hongkai Xiao, Siyu Liang, Qinhong Cai, Jinghu Liu, Liang Jin, Xiaochao Chen
The clinical application of Doxorubicin (DOX) is limited due to its cardiotoxicity. Mitophagy dysfunction is the primary cause of DOX-induced cardiotoxicity (DIC). However, the precise mechanism by which DOX regulates mitophagy remains elusive. Bag2 (BCL2-associated athanogene 2) is a cochaperone implicated in multiple pathological states. The aim of this study was to investigate the potential cardio-protective effects of Bag2 in DIC. C57BL/6 mice and AC16 cells were used to establish DIC model. The expression of Bag2 were measured by western blotting and immunohistochemical. The effects of Bag2 on DIC were assessed through functional gain and loss experiments. Through in vitro and in vivo experiments, we found that Bag2 expression was significantly reduced after DOX treatment. Both Bag2 knockdown and DOX administration resulted in apoptosis, mitochondrial dysfunction, and impaired mitophagy. Conversely, Bag2 overexpression exerted protective effects against these phenotypes induced by DOX stimulation. Mechanistically, Bag2 maintained mitophagy activation by binding to Pink1 and protecting it from proteasome-dependent degradation, thereby preserving mitochondrial function and protecting against myocardial lesions. Our findings suggest that Bag2 may serve as a promising therapeutic target for the treatment of DIC.
由于多柔比星(DOX)的心脏毒性,其临床应用受到了限制。有丝分裂功能障碍是 DOX 诱导的心脏毒性(DIC)的主要原因。然而,DOX调控有丝分裂的确切机制仍不清楚。Bag2(BCL2-相关athanogene 2)是一种与多种病理状态有关的辅助伴侣蛋白。本研究旨在探讨 Bag2 在 DIC 中的潜在心脏保护作用。研究使用 C57BL/6 小鼠和 AC16 细胞建立 DIC 模型。通过Western印迹和免疫组化检测Bag2的表达。通过功能增益和丧失实验评估了 Bag2 对 DIC 的影响。通过体外和体内实验,我们发现Bag2的表达在DOX处理后明显降低。敲除 Bag2 和服用 DOX 都会导致细胞凋亡、线粒体功能障碍和有丝分裂障碍。相反,Bag2的过表达对DOX刺激引起的这些表型具有保护作用。从机理上讲,Bag2通过与Pink1结合并保护其免于蛋白酶体依赖性降解来维持有丝分裂的激活,从而保护线粒体功能并防止心肌病变。我们的研究结果表明,Bag2可能是治疗DIC的一个有前景的治疗靶点。
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引用次数: 0
Particulate matter induced cognitive impairments via endoplasmic reticulum stress-mediated damage to mitochondria-associated endoplasmic reticulum membranes in immature rats 微粒物质通过内质网应激介导的线粒体相关内质网膜损伤,诱发未成熟大鼠的认知障碍。
IF 4.8 3区 医学 Q1 PHARMACOLOGY & PHARMACY Pub Date : 2024-10-21 DOI: 10.1016/j.tox.2024.153979
Lingman Wang, Jianxiong Gui, Bing Tian, Ran Ding, Wandi Wang, Chunxue Jiang, Shengxuan Zhang, Xiaofang Zhang, Jie Liu , Li Jiang
Particulate matter (PM) exposure has been increasingly recognized as detrimental to cognitive function and is associated with neurodevelopmental disorders. Mitochondria-associated endoplasmic reticulum membranes (MAMs) form an integrated interface between mitochondria and the endoplasmic reticulum (ER), facilitating crucial cellular functions. Prolonged ER stress (ERS) is implicated in various pathological states in the nervous system. MAMs and ERS may play vital roles in adverse effects of early-life PM exposure on cognitive abilities. This study investigated whether ERS plays a role in PM-induced MAMs dysfunction, leading to neuronal damage and cognitive impairments in early postnatal rats. Using a rat model with PM exposure concentrations of 2 and 10 mg/kg from postnatal Day 3 (PND3) to PND28, we observed that PM exposure resulted in anxiety-like behavior and impaired spatial working memory. The protein levels of ERS markers, including GRP78 and CHOP, were significantly increased in response to PM exposure. Western blot, transmission electron microscopy (TEM), and immunofluorescence analyses revealed decreased MAMs-related proteins and disrupted MAM structure and function caused by PM exposure. Administration of the ERS inhibitor 4-phenylbutyric acid (4-PBA) ameliorated these effects, restoring MAMs integrity and improving cognitive deficits. These findings highlighted the key role of ERS-MAMs dysfunction in PM-induced neurotoxicity and cognitive impairments, providing a new perspective and strategy for the prevention of cognitive deficits in early age with PM exposure.
越来越多的人认识到,暴露于颗粒物质(PM)会损害认知功能,并与神经发育障碍有关。线粒体相关内质网膜(MAMs)是线粒体和内质网(ER)之间的一个综合界面,可促进关键的细胞功能。长期的ER应激(ERS)与神经系统的各种病理状态有关。早期暴露于可吸入颗粒物对认知能力的不良影响中,MAMs 和 ERS 可能起着至关重要的作用。本研究探讨了ERS是否在可吸入颗粒物诱导的MAMs功能障碍中发挥作用,从而导致出生后早期大鼠神经元损伤和认知障碍。我们使用了一个大鼠模型,从出生后第3天(PND3)到PND28,接触的可吸入颗粒物浓度分别为2毫克/千克和10毫克/千克,观察到接触可吸入颗粒物会导致焦虑样行为和空间工作记忆受损。包括GRP78和CHOP在内的ERS标记物的蛋白质水平在接触可吸入颗粒物后显著增加。Western印迹、透射电子显微镜(TEM)和免疫荧光分析表明,暴露于可吸入颗粒物会导致MAMs相关蛋白质减少,MAM的结构和功能受到破坏。服用ERS抑制剂4-苯基丁酸(4-PBA)可改善这些影响,恢复MAMs的完整性并改善认知障碍。这些发现凸显了ERS-MAMs功能障碍在可吸入颗粒物诱发的神经毒性和认知障碍中的关键作用,为预防暴露于可吸入颗粒物的早年儿童出现认知障碍提供了新的视角和策略。
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引用次数: 0
PBDEs and dechlorane plus contamination in community e-waste recycling: Environmental and health implications in Northeastern Thailand 社区电子废物回收中的多溴联苯醚和多氯联苯污染:对泰国东北部环境和健康的影响。
IF 4.8 3区 医学 Q1 PHARMACOLOGY & PHARMACY Pub Date : 2024-10-18 DOI: 10.1016/j.tox.2024.153972
Hana Walaska , Alice Dvorska , Jindrich Petrlik , Thitikorn Boontongmai , Nichchawan Bubphachat , Jitka Strakova , Chutimon Thowsakul , Akarapon Teebthaisong , Nikola Jelinek , Valeriya Grechko , Penchom Saetang , Punyathorn Jeungsmarn , Prakaikan Phanphet , Surachate Pulawun , Aneta Sykorova , Tomas Gramblicka , Jana Pulkrabova , David O. Carpenter
Electronic waste (e-waste) poses significant environmental and health risks in Thailand due to both domestic production and international imports. A notable portion of this waste is processed in small-scale, community-based workshops, often located in poorer regions, where safety regulations are improperly enforced or entirely ignored. This study focuses on the Kalasin province in Northern Thailand, a region with numerous such workshops, where no comprehensive analysis of exposure to polybrominated diphenyl ethers (PBDEs) and dechlorane plus (DP) has been conducted. The study's objective was to quantify these toxic substances in environmental and biological samples to assess its contamination and human health risks. Environmental samples, including soil, dust, sediment, ash, eggs, crabs, snails, fish, and rice, were collected from e-waste processing sites and compared with control areas. Blood samples from e-waste workers and a control group were also analysed. Gas chromatography coupled with mass spectrometry operated in negative ion chemical ionization (GC-NCI-MS) was used to quantify PBDEs and DP isomers. Results showed significantly higher concentrations of these toxic compounds in e-waste sites compared to control areas. E-waste workers also had elevated levels of these substances in their blood, suggesting exposure through contaminated dust and food. These findings underscore the severe environmental contamination and health risks associated with improper e-waste management, highlighting the urgent need for regulatory measures and improved recycling practices to safeguard both environmental and public health.
由于国内生产和国际进口,电子废物(e-waste)对泰国的环境和健康构成了重大风险。这些废弃物中有相当一部分是在小规模的社区作坊中处理的,这些作坊通常位于较贫困的地区,安全法规执行不当或完全被忽视。本研究的重点是泰国北部的加拉信府,该地区有许多这样的作坊,但却没有对接触多溴联苯醚 (PBDE) 和脱氯剂 (DP) 的情况进行过全面分析。这项研究的目的是量化环境和生物样本中的这些有毒物质,以评估其污染情况和对人类健康的危害。研究人员从电子垃圾处理场收集了土壤、灰尘、沉积物、灰烬、蛋、蟹、螺、鱼和大米等环境样本,并与对照区进行了比较。此外,还对电子废物工人和对照组的血液样本进行了分析。采用气相色谱-负离子化学电离质谱法(GC-NCI-MS)对多溴联苯醚和多溴联苯醚异构体进行定量分析。结果表明,与对照区相比,电子垃圾场中这些有毒化合物的浓度明显更高。电子垃圾处理工人血液中这些物质的含量也有所升高,这表明他们是通过受污染的灰尘和食物接触到这些物质的。这些发现强调了电子废物管理不当带来的严重环境污染和健康风险,突出表明迫切需要采取监管措施和改进回收做法,以保护环境和公众健康。
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引用次数: 0
ATF4/PHGDH mediates the effects of ER stress on cadmium-induced autophagy and glycolysis ATF4/PHGDH介导ER应激对镉诱导的自噬和糖酵解的影响
IF 4.8 3区 医学 Q1 PHARMACOLOGY & PHARMACY Pub Date : 2024-10-18 DOI: 10.1016/j.tox.2024.153976
Yanqiu Yang , Shengnan Li , Yuanxi Yang , Qiujuan Li , Yong Liu , Jun Cao
Cadmium (Cd) has been classified as a Class I carcinogen, but the mechanism of its carcinogenicity is still unknown. Our previous study demonstrated that 2 μM CdCl2 induced autophagy in A549 cells. In this study, we investigated the role of ATF4/PHGDH in Cd-induced autophagy and increased glycolysis. First, BALB/c mice were subcutaneously injected with A549 cells co-treated with or without Cd and siPHGDH to establish a xenograft tumor model, which demonstrated that PHGDH promotes Cd-induced autophagy in vivo. Cd-exposed A549 cells were treated with siPHGDH and 0.4 mM glycine (Gly), respectively. Western blot analysis and Acridine orange staining revealed that PHGDH promotes Cd-induced autophagy. Using 4-PBA (5 mM), the inhibitor of ER stress, or Tm (0.1 μg/ml), the inducer of ER stress, inhibited Cd-induced PHGDH expression. After co-treatment with siPHGDH, PHGDH was determined to mediate ER stress-induced autophagy. Furthermore, transfection with siATF4 inhibited Tm-induced PHGDH expression. ChIP-qPCR experiments demonstrated the transcription regulatory mechanism of ATF4 on PHGDH. Meanwhile, the role of ER stress/PHGDH/autophagy in Cd-promoted cell migration was explored by scratch assay. Finally, the role of ER stress/PHGDH/autophagy in Cd-induced glycolysis was unveiled. In summary, the transcriptional regulation of PHGDH by ATF4 plays a crucial role in Cd-induced autophagy triggered by ER stress. The axis of ER stress/PHGDH/autophagy is important in Cd-induced cell migration by enhancing glycolysis.
镉(Cd)已被列为一级致癌物,但其致癌机制尚不清楚。我们之前的研究表明,2μM CdCl2 可诱导 A549 细胞自噬。在本研究中,我们探讨了 ATF4/PHGDH 在镉诱导的自噬和糖酵解增加中的作用。首先,给 BALB/c 小鼠皮下注射经 Cd 或不经 Cd 和 siPHGDH 共同处理的 A549 细胞,建立异种移植肿瘤模型,结果表明 PHGDH 能促进 Cd 诱导的体内自噬。分别用 siPHGDH 和 0.4mM 甘氨酸(Gly)处理暴露于镉的 A549 细胞。Western 印迹分析和吖啶橙染色显示,PHGDH 能促进镉诱导的自噬。使用ER应激抑制剂4-PBA(5mM)或ER应激诱导剂Tm(0.1μg/ml)可抑制Cd诱导的PHGDH表达。与 siPHGDH 联合处理后,PHGDH 被确定介导了 ER 应激诱导的自噬。此外,转染 siATF4 可抑制 Tm 诱导的 PHGDH 表达。ChIP-qPCR 实验证明了 ATF4 对 PHGDH 的转录调控机制。同时,通过划痕实验探讨了ER应激/PHGDH/自噬在镉促进细胞迁移中的作用。最后,揭示了ER应激/PHGDH/自噬在Cd诱导的糖酵解中的作用。综上所述,ATF4对PHGDH的转录调控在ER应激诱导的Cd诱导的自噬中起着至关重要的作用。ER应激/PHGDH/自噬轴通过增强糖酵解在Cd诱导的细胞迁移中起着重要作用。
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引用次数: 0
Predictive, integrative, and regulatory aspects of AI-driven computational toxicology – Highlights of the German Pharm-Tox Summit (GPTS) 2024 人工智能驱动的计算毒理学的预测、整合和监管方面--2024 年德国药物毒理学峰会(GPTS)亮点。
IF 4.8 3区 医学 Q1 PHARMACOLOGY & PHARMACY Pub Date : 2024-10-18 DOI: 10.1016/j.tox.2024.153975
Ute Haßmann , Sigrid Amann , Nelly Babayan , Simone Fankhauser , Tina Hofmaier , Thomas Jakl , Monika Nendza , Helga Stopper , Sven Marcel Stefan , Robert Landsiedel
The 9th German Pharm-Tox Summit (GPTS) and the 90th Annual Meeting of the German Society for Experimental and Clinical Pharmacology and Toxicology (DGPT) took place in Munich from March 13–15, 2024. The event brought together over 700 participants from around the world to discuss cutting-edge developments in the fields of pharmacology and toxicology as well as scientific innovations and novel insights. A key focus of the conference was on the rapidly increasing role of computational toxicology, artificial intelligence (AI), and machine learning (ML) into the field, marking a shift away from traditional methods and allowing the reduction of animal testing as primary tool for toxicological risk assessment. Tools such as Toxometris.ai showcased the potential of AI-based risk assessments for predicting carcinogenicity, offering more ethical and efficient alternatives. Additionally, computer-driven models like computer-aided pattern analysis (C@PA) for drug toxicity prediction were presented, emphasizing the growing role of chem- and bioinformatic applications in computational sciences. Throughout the summit, there was a strong focus on the need for regulatory innovation to support the adoption of these advanced technologies and ensure the safety and sustainability of chemical substances and drugs.
第九届德国药理毒理峰会(GPTS)暨德国实验与临床药理学和毒理学学会(DGPT)第90届年会于2024年3月13日至15日在慕尼黑举行。来自世界各地的 700 多名与会者汇聚一堂,共同探讨药理学和毒理学领域的前沿发展以及科学创新和新见解。本次会议的一个重点是计算毒理学、人工智能(AI)和机器学习(ML)在该领域中迅速增强的作用,这标志着传统方法的转变,并允许减少动物试验作为毒理学风险评估的主要工具。Toxometris.ai 等工具展示了基于人工智能的风险评估在预测致癌性方面的潜力,提供了更合乎道德和更高效的替代方法。此外,会议还介绍了用于药物毒性预测的计算机辅助模式分析(C@PA)等计算机驱动模型,强调了化学和生物信息学应用在计算科学中日益重要的作用。在整个峰会期间,与会者强烈关注监管创新的必要性,以支持这些先进技术的采用,并确保化学物质和药物的安全性和可持续性。
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引用次数: 0
Knock-down of FOXO3, GATA2, NFE2L2 and AHR promotes doxorubicin-induced cardiotoxicity in human cardiomyocytes 敲除 FOXO3、GATA2、NFE2L2 和 AHR 会促进多柔比星诱导的人类心肌细胞心脏毒性。
IF 4.8 3区 医学 Q1 PHARMACOLOGY & PHARMACY Pub Date : 2024-10-18 DOI: 10.1016/j.tox.2024.153977
J.G. Faber, J. Ochoteco Asensio, F. Caiment, T. van den Beucken
Recent advances in cancer therapy have substantially increased survival rates among patients, yet the prolonged effect of current treatment regimens with anthracyclines (ACs) often include severe long-term complications, notably in the form of anthracycline-induced cardiotoxicity (AIC). Despite known associations between AC treatment and AIC, a comprehensive understanding of the underlying molecular pathways remains elusive. This gap is highlighted by the scarcity of reliable therapeutic interventions, with dexrazoxane being the sole FDA-approved drug to mitigate AIC risks. This study aims at elucidating the transcriptional response of human cardiomyocytes (hCMs) to AC exposure by analyzing a previously generated RNA-sequencing dataset of cardiac spheroids subjected to clinically relevant doses of ACs. The analysis revealed a robust transcriptional response identified across various time points. We aimed at identifying important transcription factors (TFs) mediating AIC by employing predictive algorithms to highlight key TFs for further experimental validation. Using shRNA constructs, we further assessed the impact of these TFs on hCM response to doxorubicin (DOX) and revealed that these TFs had a notable impact on hCM survival upon DOX exposure. TFs FOXO3, GATA2, AHR and NFE2L2 were further investigated for their role in AIC including cell viability, DOX uptake, DNA damage repair and induction of apoptosis through Cleaved-Caspase 3. Our study demonstrated that eliminating FOXO3 and GATA2 made hCMs more vulnerable to DOX and the lack of GATA2, NFE2L2 and AHR led to significantly higher intracellular levels of DOX. Additionally, FOXO3 played a role in the repair of hCM DNA damage as we observed markedly enhanced levels of CDKN1A. We also noted significant increases in DNA damage through COMET-assays when FOXO3, GATA2, NFE2L2 and AHR were absent. Furthermore, we investigated the clinical relevance by comparing our results with those from a study based on hiPSC-CMs derived from patients with doxorubicin-induced cardiotoxicity, identifying overlapping TFs and their regulatory roles in critical cellular processes like the cell cycle and DNA repair. This approach not only advances the understanding of the molecular mechanisms behind AIC but also opens possible windows for new therapeutic approaches to mitigate the negative side-effects from patient AC treatment.
癌症治疗的最新进展大大提高了患者的生存率,但目前使用蒽环类药物(ACs)进行治疗的长期效果往往包括严重的长期并发症,特别是蒽环类药物诱发的心脏毒性(AIC)。尽管已知蒽环类药物治疗与 AIC 之间存在关联,但对其潜在分子通路的全面了解仍然遥遥无期。缺乏可靠的治疗干预措施凸显了这一空白,而右雷佐生是美国食品及药物管理局批准的唯一一种缓解 AIC 风险的药物。本研究旨在通过分析之前生成的、受临床相关剂量AC影响的心脏球体RNA测序数据集,阐明人心肌细胞(hCMs)对AC暴露的转录反应。分析结果显示,不同时间点的转录反应都很强。我们的目的是通过采用预测算法来识别介导 AIC 的重要转录因子 (TF),从而突出关键 TF,进行进一步的实验验证。利用 shRNA 构建物,我们进一步评估了这些转录因子对 hCM 对多柔比星(DOX)反应的影响,结果发现这些转录因子对 hCM 暴露于 DOX 时的存活有显著影响。我们进一步研究了 FOXO3、GATA2、AHR 和 NFE2L2 等因子在 AIC 中的作用,包括细胞活力、DOX 吸收、DNA 损伤修复以及通过裂解-Caspase 3 诱导细胞凋亡。我们的研究表明,消除 FOXO3 和 GATA2 会使 hCMs 更容易受到 DOX 的伤害,缺乏 GATA2、NFE2L2 和 AHR 会导致细胞内 DOX 水平显著升高。此外,FOXO3 还在 hCM DNA 损伤的修复过程中发挥作用,因为我们观察到 CDKN1A 水平明显升高。我们还通过 COMET 分析发现,当 FOXO3、GATA2、NFE2L2 和 AHR 缺失时,DNA 损伤会明显增加。此外,我们还将我们的研究结果与一项基于多柔比星诱导的心脏毒性患者的 hiPSC-CMs 的研究结果进行了比较,确定了重叠的 TFs 及其在细胞周期和 DNA 修复等关键细胞过程中的调控作用,从而研究了两者的临床相关性。这种方法不仅加深了人们对 AIC 背后的分子机制的理解,还为新的治疗方法打开了可能的窗口,以减轻患者 AC 治疗的负面副作用。
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引用次数: 0
A microRNA signature for valproate-induced steatosis in human hepatocytes and its application to predict fatty liver in paediatric epileptic patients on valproate therapy 丙戊酸钠诱导人肝细胞脂肪变性的微RNA特征及其在预测接受丙戊酸钠治疗的儿科癫痫患者脂肪肝中的应用。
IF 4.8 3区 医学 Q1 PHARMACOLOGY & PHARMACY Pub Date : 2024-10-17 DOI: 10.1016/j.tox.2024.153974
Polina Soluyanova , Marta del Pozo , Erika Moro-Castaño , Ana V. Marco-Hernández , José V. Castell , Ramiro Jover
Valproate (VPA) has been the first-line, most frequently prescribed antiepileptic drug in children over the past 50 years. VPA causes, idiosyncratic hepatotoxicity in some patients, who often presents with hepatic steatosis. Experimental studies also support that VPA has high potential to induce steatosis. However, there is an apparent lack of significant hepatic problems in neuropediatric units, likely because iatrogenic liver steatosis lacks specific biomarkers. Thus, it is possible that a relevant number of children under VPA have asymptomatic fatty liver.

Aims

1) to demonstrate VPA-induced triglyceride (TG) accumulation in cultured human upcyte hepatocytes, 2) to identify miRNAs that are deregulated by VPA and associated with TG levels in these cells, and 3) to test these miRNAs, as potential non-invasive biomarkers, in plasma of paediatric epileptic patients on VPA, to identify those with a potential risk of liver steatosis.
Human upcyte hepatocytes were exposed to subcytotoxic VPA concentrations. Hepatocytes increased intracellular TGs by 27 % and 45 % after 2 and 4 mM VPA for 24 h. The profiling of cellular miRNAs by microarray analysis after 4 mM VPA identified 43 deregulated human miRNAs (fold-change > 1.5 or < −1.5; FDR p<0.05). Some of them (n=11), which were validated by RTqPCR and showed correlation (Pearson r≥ 0.6) with intracellular TG levels, were selected as potential VPA-induced steatosis biomarkers. Next, we investigated the expression of these miRNAs in human plasma and found that 9 of them could be reliably quantified by RTqPCR: miR-485-3p, miR-127-3p, miR-30a-3p, miR-92b-3p, miR-212-3p, miR-182-5p, miR-183-5p, miR-500a-5p and miR-675-5p. Screening of this 9-miRNA signature in 80 paediatric epileptic patients on VPA identified 18 patients (23 %) that clustered separately because of important alterations in the selected plasma miRNAs. These patients were younger and had higher VPA blood concentrations and serum liver enzyme levels.
In conclusion, VPA induced both TG accumulation and deregulation of a set of miRNAs in cultured human hepatocytes. Nine of these miRNAs have demonstrated potential as circulating biomarkers to identify VPA-induced steatosis in epileptic patients, which should require closer clinical follow-up.
过去 50 年来,丙戊酸钠(VPA)一直是儿童最常用的一线抗癫痫药物。VPA 会导致一些患者出现特异性肝毒性,这些患者通常会出现肝脏脂肪变性。实验研究也支持 VPA 很有可能诱发脂肪变性。然而,神经儿科明显缺乏明显的肝脏问题,这可能是因为先天性肝脏脂肪变性缺乏特定的生物标志物。因此,在接受 VPA 治疗的儿童中,可能有相当数量的人患有无症状脂肪肝。目的:1)证明 VPA 诱导的甘油三酯(TG)在培养的人类上囊肝细胞中的积累;2)确定受 VPA 影响并与这些细胞中 TG 水平相关的 miRNA;3)检测这些 miRNA,作为潜在的非侵入性生物标志物,检测使用 VPA 的儿科癫痫患者血浆中的 miRNA,以确定那些有潜在肝脏脂肪变性风险的患者。人类上囊肝细胞暴露于亚细胞毒性 VPA 浓度。在 2mM 和 4mM VPA 作用 24 小时后,肝细胞内的总胆固醇分别增加了 27% 和 45%。在 4mM VPA 后,通过微阵列分析细胞 miRNAs,发现了 43 个失调的人类 miRNAs(折叠变化 > 1.5 或 < -1.5; FDR p
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引用次数: 0
Unraveling the ozone impact and oxidative stress on the nervous system 解读臭氧对神经系统的影响和氧化应激。
IF 4.8 3区 医学 Q1 PHARMACOLOGY & PHARMACY Pub Date : 2024-10-16 DOI: 10.1016/j.tox.2024.153973
Paola Rodriguez , Alejandro López-Landa , Héctor Romo-Parra , Moisés Rubio-Osornio , Carmen Rubio
Ozone (O₃), a potent oxidant, can penetrate the body through breathing, generating reactive oxygen species (ROS) and triggering inflammatory processes. Oxidative stress, an imbalance between the production of ROS and the body’s antioxidant capacity, plays a crucial role in the pathophysiology of various neurodegenerative diseases. This phenomenon can negatively impact the Central Nervous System (CNS), inducing structural and functional alterations that contribute to the development of neurological pathologies. This review examines how O₃-induced oxidative stress affects the nervous system by analyzing existing literature on the involved molecular mechanisms and potential antioxidant systems to mitigate its effects. Through a comprehensive review of experimental studies, our objective is to shed light on the interaction between O₃ and the nervous system, as well as its signaling pathways and altered genes, providing a foundation for future research in this field. Several studies have demonstrated that prolonged exposure to O₃ leads to increased expression of reactive oxygen species, causing alterations in the blood-brain barrier and damage to astrocytes and microglia. These effects can lead to an increase in the production of proinflammatory cytokines, neurotoxins, and genes, exacerbating neuronal damage and accelerating the progression of neurodegenerative diseases such as Alzheimer’s, Parkinson’s, and other neurological disorders. The results of this review suggest that exposure to O₃ may induce oxidative damage to the nervous system, which could have significant implications for public health.
臭氧(O₃)是一种强效氧化剂,可通过呼吸进入人体,产生活性氧(ROS)并引发炎症过程。氧化应激是 ROS 的产生与人体抗氧化能力之间的失衡,在各种神经退行性疾病的病理生理学中起着至关重要的作用。这种现象会对中枢神经系统(CNS)产生负面影响,诱发结构和功能的改变,从而导致神经系统病变的发生。本综述通过分析现有文献中涉及的分子机制和潜在的抗氧化系统来减轻氧化应激的影响,探讨氧化应激如何影响神经系统。通过对实验研究的全面回顾,我们的目标是阐明₃与神经系统之间的相互作用及其信号通路和改变的基因,为这一领域未来的研究奠定基础。多项研究表明,长期暴露于 O₃ 会导致活性氧的表达增加,引起血脑屏障的改变以及星形胶质细胞和小胶质细胞的损伤。这些影响会导致促炎细胞因子、神经毒素和基因的产生增加,加剧神经元损伤,加速阿尔茨海默氏症、帕金森氏症和其他神经系统疾病等神经退行性疾病的发展。本综述的结果表明,暴露于 O₃ 可能会诱发神经系统的氧化损伤,这可能会对公共健康产生重大影响。
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引用次数: 0
The effects of fumonisin B1 on intercellular communications and miRNA modulations: Non-genotoxic carcinogenesis mechanisms in human kidney cells 伏马菌素 B1 对细胞间通信和 miRNA 调控的影响:人类肾脏细胞的非遗传毒性致癌机制
IF 4.8 3区 医学 Q1 PHARMACOLOGY & PHARMACY Pub Date : 2024-10-15 DOI: 10.1016/j.tox.2024.153968
Ecem Fatma Karaman , Mahmoud Abudayyak , Zeynep Rana Guler , Suna Bektas , Engin Kaptan , Sibel Ozden
Fumonisin B1 (FB1), which is produced by Fusarium species, is one of the most prevalent mycotoxins known to exert several toxic effects, particularly nephrotoxicity. While its genotoxic carcinogenic mechanisms have been extensively studied, its influence on non-genotoxic pathways including intercellular communication and microRNA (miRNA) regulation remain underexplored. The present study investigates the effects of FB1 on gap junctions, miRNA expression profiles, and their relationship in human kidney cells (HK-2 and HEK293). Both cell lines showed increased apoptosis rates at 50 and 100 µM, while FB1 exposure significantly reduced gap junctional intercellular communication (GJIC) and decreased the expression levels of related genes, including Cx43, Cx45, e-cadherin, Cadherin-2, and β-catenin. After FB1 treatments alteration on the regulation of miRNAs including let-7a-5p, miR-125a-5p, miR-222–3p, miR-92a-3p, let-7b-5p, let-7e-5p, miR-21–5p, miR-155–5p, let-7i-5p, let-7d-5p, let-7f-5p, miR-181b-5p, miR-15b-5p, miR-23b-3p, miR-20b-5p, miR-196a-5p miRNAs have been shown. Let-7a-5p was selected among the altered miRNAs to elucidate the relationship between miRNAs and GJIC after FB1 exposure as it is one of the common miRNAs that changes in both cell lines and one of its target genes is Cx45, which is an important gene for GJIC. However, transfection analysis did not show any differences, resulting in Cx45 not being a direct target of let-7a-5p in HK-2 and HEK-293 cells. Through comprehensive analysis, we elucidated that FB1's impact on intercellular signaling cascades and its regulatory role on miRNA expression profiles, offering valuable insights into carcinogenesis beyond traditional genotoxic paradigms. Understanding these mechanisms is crucial for elucidating the mechanisms of FB1-induced toxicity.
由镰刀菌产生的伏马菌素 B1(FB1)是最常见的霉菌毒素之一,具有多种毒性作用,尤其是肾毒性。虽然对其基因毒性致癌机制进行了广泛研究,但其对非基因毒性途径(包括细胞间通信和微核糖核酸(miRNA)调控)的影响仍未得到充分探索。本研究探讨了 FB1 对人肾脏细胞(HK-2 和 HEK293)中间隙连接、miRNA 表达谱的影响及其关系。在 50 和 100µM 浓度下,两种细胞系的细胞凋亡率都有所上升,而 FB1 暴露则会显著降低细胞间隙连接通讯(GJIC),并降低相关基因的表达水平,包括 Cx43、Cx45、e-cadherin、Cadherin-2 和 β-catenin。经 FB1 处理后,miRNAs 的调控发生了改变,包括 let-7a-5p、miR-125a-5p、miR-222-3p、miR-92a-3p、let-7b-5p、let-7e-5pmiR-21-5p, miR-155-5p, let-7i-5p, let-7d-5p, let-7f-5p, miR-181b-5p, miR-15b-5p, miR-23b-3p, miR-20b-5p, miR-196a-5p miRNAs。由于 Let-7a-5p 是两种细胞系中发生变化的常见 miRNA 之一,而且它的靶基因之一是 Cx45,而 Cx45 是 GJIC 的一个重要基因,因此,研究人员从发生变化的 miRNA 中选择了 Let-7a-5p 来阐明 miRNA 与 FB1 暴露后 GJIC 的关系。然而,转染分析并没有显示出任何差异,因此在 HK-2 和 HEK-293 细胞中,Cx45 并不是 let-7a-5p 的直接靶标。通过综合分析,我们阐明了 FB1 对细胞间信号级联的影响及其对 miRNA 表达谱的调控作用,为我们提供了超越传统基因毒性范例的宝贵的致癌见解。了解这些机制对于阐明 FB1 诱导毒性的机制至关重要。
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引用次数: 0
The use of digital health services to combat E-waste health hazards: A review on the impact and awareness in Southwest Nigeria 利用数字保健服务消除电子废物对健康的危害:对尼日利亚西南部地区的影响和认识的回顾。
IF 4.8 3区 医学 Q1 PHARMACOLOGY & PHARMACY Pub Date : 2024-10-12 DOI: 10.1016/j.tox.2024.153969
Brendan Chukwuemeka Ezeudoka , Charles Igwe , Oscar Chidiebere Ukaegbu , Emmanuel Sunday Okeke , Veronica Chisom Okeke
The rapid advancement of technology has led to a significant increase in electronic waste (e-waste), posing serious health and environmental risks, particularly in developing regions like Southwest Nigeria. This review explores the utilization of digital health services to combat the health hazards associated with e-waste exposure. Digital health technologies, including mobile health applications, telemedicine, and electronic health records, play a critical role in raising awareness about e-waste toxicity, monitoring health impacts, and providing remote healthcare services to at-risk populations. This article discusses the effectiveness of these technologies in promoting safer e-waste handling practices and mitigating health risks, highlighting their potential in supporting public health interventions in underserved areas. The study underscores the need for strategic investments and policy support to enhance the adoption of digital health solutions in managing e-waste hazards by analyzing current challenges and opportunities, ultimately contributing to better health outcomes and environmental sustainability.
技术的飞速发展导致电子垃圾(e-waste)的大量增加,带来了严重的健康和环境风险,尤其是在尼日利亚西南部这样的发展中地区。本综述探讨了如何利用数字医疗服务来应对与电子垃圾接触相关的健康危害。数字医疗技术,包括移动医疗应用、远程医疗和电子健康记录,在提高人们对电子垃圾毒性的认识、监测对健康的影响以及为高危人群提供远程医疗服务方面发挥着至关重要的作用。本文讨论了这些技术在促进更安全的电子废物处理方法和降低健康风险方面的有效性,强调了它们在支持服务不足地区的公共卫生干预措施方面的潜力。该研究强调了进行战略投资和提供政策支持的必要性,通过分析当前的挑战和机遇,促进在管理电子废物危害方面采用数字健康解决方案,最终为改善健康状况和环境可持续性做出贡献。
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引用次数: 0
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