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Global regulatory considerations and practices for tumorigenicity evaluation of cell-based therapy 细胞治疗致瘤性评估的全球监管考虑和实践。
IF 3 4区 医学 Q1 MEDICINE, LEGAL Pub Date : 2025-02-01 DOI: 10.1016/j.yrtph.2024.105769
Dehu Dou , Jing Lu , Jinhui Dou , Yan Huo , Xinjiang Gong , Xuefeng Zhang , Xijing Chen
Cell-based therapy, as a “living drug”, possesses inherent complexity and heterogeneity. Tumorigenicity evaluation is a crucial aspect of safety assessment for cell-based therapies. Stem cell-based therapies such as hESCs and hiPSCs, may contain residual undifferentiated cells in final product, which have a high potential for proliferation and differentiation, posing a risk of tumor formation in vivo. Additionally, the source, phenotype, differentiation status, proliferative capacity, ex vivo culture conditions, ex vivo processing methods, injection site, and route of administration also influence the tumorigenicity risk of the cells. Tumorigenicity evaluation needs to consider the complexity of design and multifactorial influences. Through the analysis and summary of partial existing marketed and under-development products, combined with practical experience, it is found that there are many differences in requirements and practices related to cell tumorigenicity globally. Regulatory requirements also vary, and guidance and support for applicants’ declaration requirements in different regions need to be considered in conjunction with product characteristics and regulatory considerations. This article comprehensively summarizes the requirements of tumorigenicity from main regulatory agencies. Currently, there is no unified global regulatory consensus on technical implementation guide, measures for quantitation or standardization have not been established for evaluation systems. However, based on regulatory requirements and industry practice summaries, through literature research and analysis of tumorigenicity strategy of representative marketed products, the basic focus, and evaluation strategies for tumorigenicity assessment have been preliminarily clarified, providing a reference for the tumorigenicity design of variety of cell-based therapy products.
细胞治疗作为一种“活的药物”,具有固有的复杂性和异质性。致瘤性评价是细胞疗法安全性评价的一个重要方面。基于干细胞的治疗,如hESCs和hiPSCs,可能在最终产品中含有残留的未分化细胞,这些细胞具有很高的增殖和分化潜力,存在体内肿瘤形成的风险。此外,来源、表型、分化状态、增殖能力、体外培养条件、体外处理方法、注射部位和给药途径也会影响细胞的致瘤性风险。致瘤性评价需要考虑设计的复杂性和多因素影响。通过对部分现有已上市和开发不足产品的分析和总结,结合实践经验,发现全球在细胞致瘤性相关的要求和实践上存在许多差异。监管要求也各不相同,需要结合产品特性和监管考虑因素,考虑对不同地区申请人申报要求的指导和支持。本文综合总结了主要监管机构对致瘤性的要求。目前,全球在技术实施指南上没有统一的监管共识,评价体系也没有建立量化或标准化的措施。然而,在法规要求和行业实践总结的基础上,通过文献研究和代表性上市产品致瘤策略分析,初步明确了致瘤性评价的基本重点和评价策略,为各种细胞治疗产品的致瘤性设计提供参考。
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引用次数: 0
The dual endothelin A and angiotensin II type 1 receptor antagonist sparsentan (FILSPARI®) exhibits a safe nonclinical male fertility toxicity profile 双重内皮素A和血管紧张素II型1受体拮抗剂sparsentan (FILSPARI®)显示出安全的非临床男性生育毒性。
IF 3 4区 医学 Q1 MEDICINE, LEGAL Pub Date : 2025-02-01 DOI: 10.1016/j.yrtph.2024.105770
Patricia W. Bedard , Francesca Pretto , Sima Patel , Celia Jenkinson , Tacey White , Donald E. Kohan
Marketed endothelin receptor antagonists (ERAs) have been associated with testicular tubular atrophy and decreases in male animal fertility in chronic toxicity studies in rats and dogs. Consistent with these findings, reduced sperm count has been observed in the clinical setting and is considered a potential class risk with chronic administration of ERAs. In contrast, no such effects on male animal fertility are noted with angiotensin II type 1 receptor blocker (ARB) treatment. Sparsentan (FILSPARI®) is a novel single molecule dual antagonist that antagonizes both the endothelin type A and angiotensin II type 1 receptors. We explored whether the reproductive toxicology profile of this dual endothelin angiotensin antagonist is more like that of marketed ERAs or ARBs. A full package of repeat dose general toxicity, juvenile toxicity, carcinogenicity, and reproductive and developmental toxicity studies was completed with sparsentan. A thorough review of the results from these studies has shown no evidence of effects of sparsentan on spermatogenesis or testicular histopathology. The overall conclusion of this assessment is that sparsentan is not toxic to the testes or the spermatogenic process and is more like ARBs than ERAs in its male fertility toxicity profile.
在大鼠和狗的慢性毒性研究中,已上市的内皮素受体拮抗剂(ERAs)与睾丸小管萎缩和雄性动物生育能力下降有关。与这些发现一致,在临床环境中观察到精子数量减少,并且被认为是长期使用ERAs的潜在风险。相比之下,血管紧张素II型1受体阻滞剂(ARB)治疗对雄性动物的生育能力没有这种影响。Sparsentan (FILSPARI®)是一种新型单分子双拮抗剂,可拮抗内皮素a型和血管紧张素II型1受体。我们探讨了这种双重内皮素血管紧张素拮抗剂的生殖毒理学特征是否更像市场上销售的era或arb。完整的重复剂量一般毒性、青少年毒性、致癌性、生殖和发育毒性研究用斯帕森坦完成。对这些研究结果的全面回顾表明,没有证据表明sparsentan对精子发生或睾丸组织病理学有影响。该评估的总体结论是,sparsentan对睾丸或生精过程没有毒性,在男性生育毒性方面更像arb而不是ERAs。
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引用次数: 0
Toxicological evaluation of vanadium and derivation of a parenteral tolerable intake value for medical devices 钒的毒理学评估和医疗器械肠外耐受摄入值的推导。
IF 3 4区 医学 Q1 MEDICINE, LEGAL Pub Date : 2025-02-01 DOI: 10.1016/j.yrtph.2024.105732
Charlotte E. Laupheimer , Yana Kolianchuk , Rex E. FitzGerald , Martin F. Wilks , Arne Jaksch
Vanadium is used in alloys, batteries as well as catalyst and is a known impurity in medical devices and pharmaceuticals. The present work describes the calculation of a parenteral tolerable intake (TI) for vanadium by chronic exposure in implantable medical devices per ISO 10993–17:2023, the applicable standard. The 2023 update of ISO 10993-17 [1] introduces new uncertainty factors (UFs) for calculating a TI. Therefore, we noted differences between the ISO guidance and the ICH Q3D guidance on Permissible Daily Exposure (PDE) for parental elemental pharmaceutical impurities. We derived a TI of 0.20 μg V/kg/day based on the updated ISO guidance, and a PDE of 0.24 μg V/kg/day based on ICH guidance. The latter is considered a more realistic estimate.
钒用于合金、电池和催化剂,也是医疗器械和药品中的一种已知杂质。本研究介绍了根据 ISO 10993-17:2023(适用标准)计算植入式医疗器械中长期接触钒的肠外耐受摄入量(TI)。ISO 10993-17[1]的2023更新版引入了计算TI的新不确定系数(UF)。因此,我们注意到 ISO 指南与 ICH Q3D 指南中关于亲元素药物杂质每日允许暴露量 (PDE) 的不同之处。根据最新的 ISO 指南,我们得出 TI 为 0.20 μg V/kg/day,而根据 ICH 指南,PDE 为 0.24 μg V/kg/day。后者被认为是更切合实际的估计值。
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引用次数: 0
Use of alternatives to animal testing for Environmental Safety Assessment (ESA): Report from the 2023 EPAA partners’ forum
IF 3 4区 医学 Q1 MEDICINE, LEGAL Pub Date : 2025-02-01 DOI: 10.1016/j.yrtph.2025.105774
Jose V. Tarazona , Ana Fernandez-Agudo , Ondrej Adamovsky , Marta Baccaro , Natalie Burden , Bruno Campos , Björn Hidding , Karen Jenner , David John , Katia Lacasse , Adam Lillicrap , Delina Lyon , Samuel K. Maynard , Amelie Ott , Veronique Poulsen , Mike Rasenberg , Katrin Schutte , Marta Sobanska , James R. Wheeler
Environmental Safety Assessments (ESA) are mandatory for several regulatory purposes and are an important component of stewardship/sustainability initiatives. Fish testing is used for assessing chemical toxicity and bioaccumulation potential; amphibians are included in some jurisdictions and their use is increasing to assess endocrine disruption. Alternative methods are becoming more available, covering the principles of the 3Rs (i.e., replacing, reducing and refining animal tests), but their regulatory incorporation is still limited. A cross-sector review by the European Partnership for Alternative Approaches to Animal Testing (EPAA), discussed the status and priorities for accelerating the adoption of non-animal approaches in ESA. The lack of an internationally agreed definition for “animal testing” was recognized as a challenge. For example, testing with vertebrate embryos up to specific developmental stages is a suitable refinement alternative only in some jurisdictions. Invertebrate testing offers refinement alternatives to develop tiered approaches using vertebrate testing as a last resort. Aquatic ESA was identified as a common need by all sectors and regulatory areas, while terrestrial ESA is particularly relevant for agrochemicals. The standardization and validation of some alternative methods as OECD test guidelines (TGs) for fish acute toxicity and fish bioaccumulation have not yet triggered the expected replacement in regulatory settings. Priority actions in these areas are needed to generate confidence in the regulatory use of the available OECD TGs designed as alternatives, including the identification of applicability domains and guidance/decision-trees for integrating different lines of evidence. Case studies under the OECD Integrated Approaches to Testing and Assessment (IATA) program could facilitate further global regulatory uptake. Replacement of fish chronic toxicity testing is more complex and less advanced. A dual approach was suggested, in the short-term, exploring lines of evidence that, alone or in combination, could identify when further fish testing is not needed. The second phase should focus on the application of the 3Rs in those cases where chronic information is needed. Another area of increasing interest is endocrine disruption. It represents a challenge but also an opportunity for implementing mechanistic non-animal methods, in addition to integrate human and ESA. This requires a step-by-step approach with continuous dialogue to ensure that technical developments will address regulatory needs. The review also agreed that the long-term aspiration is a new ESA paradigm, mapping the protection goals and providing connectivity between the chemical legislation and environmental protection policies.
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引用次数: 0
CDSCO alerts: A retrospective dosage form - Wise analysis of quality control alerts issued to pharmaceutical companies from 2018 to 2023
IF 3 4区 医学 Q1 MEDICINE, LEGAL Pub Date : 2025-02-01 DOI: 10.1016/j.yrtph.2025.105775
Akanksha Dashawant , Richa Khadke , Amol Shete , Vinod Gaikwad
This study comprehensively analyses drug alerts issued by the Central Drugs Standard Control Organization (CDSCO) from 2018 to 2023, focusing on various pharmaceutical dosage forms and related quality control parameters. By categorizing alerts and counting them individually, the research identifies prevalent quality issues and their impact on specific dosage forms. Tablets, parenteral formulations, capsules, and syrups were among the most frequently alerted categories, while expectorants, mouthwashes, and tinctures received fewer alerts. The study underscores the importance of rigorous testing protocols and continuous vigilance in maintaining pharmaceutical quality. Recommendations include adopting global standard quality measures by Indian manufacturers to ensure pharmaceutical safety and efficacy, ultimately benefiting patients and healthcare systems.
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引用次数: 0
Incorporating Singaporean habits and practices for cosmetics and personal care products into a global consumer aggregate exposure model 将新加坡人对化妆品和个人护理产品的习惯和做法纳入全球消费者总体暴露模型。
IF 3 4区 医学 Q1 MEDICINE, LEGAL Pub Date : 2025-02-01 DOI: 10.1016/j.yrtph.2024.105752
Siti Amelia Juraimi , Cesar Scrochi , Jonathan Lok , Anne Marie Api , Benjamin P.C. Smith
Understanding consumer habits and practices of cosmetics and personal care products (PCP) is essential to generate realistic product exposure data for the safety assessment of ingredients such as fragrance materials. Product usages can vary across regions due to differences in cultural norms, seasonal and climate conditions, and the availability of different product forms, yet there is limited data published on cosmetics and PCP use outside of North America and Europe. This study reports the habits and practices of cosmetics and PCP (such as frequency and amount of use) in Singapore where participants (n = 494, aged 21–64 years) recorded their product usages and had their products weighed over a two-week period. Overall, similar use patterns were observed across demographic groups within the Singapore population for most of the products surveyed, as were the expected usage amounts. Additionally, the Singaporean dataset was mapped onto the Creme-RIFM aggregate exposure model to assess exposure estimates. Preliminary comparisons with product exposures observed in the United States (US) and Europe suggest that exposures in Singapore are comparable. Findings from this study will contribute to the Creme-RIFM model, expanding its geographic scope and applicability for the global safety assessment of fragrance ingredients and fragranced products.
了解消费者使用化妆品和个人护理产品(PCP)的习惯和做法,对于产生真实的产品暴露数据,对香料等成分进行安全评估至关重要。由于文化规范、季节和气候条件的差异,以及不同产品形式的可用性,不同地区的产品使用情况可能有所不同,但在北美和欧洲以外,关于化妆品和PCP使用的公布数据有限。本研究报告了新加坡的化妆品和PCP的习惯和实践(如使用频率和数量),参与者(n=494,年龄21-64岁)记录了他们的产品使用情况,并在两周内对产品进行称重。总体而言,对于大多数被调查的产品,在新加坡人口中观察到类似的使用模式,预期使用量也是如此。此外,新加坡数据集被映射到Creme-RIFM总暴露模型上,以评估暴露估计。与在美国和欧洲观察到的产品暴露的初步比较表明,新加坡的暴露具有可比性。本研究的结果将有助于Creme-RIFM模型,扩大其地理范围和适用于全球香精成分和香精产品的安全性评估。
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引用次数: 0
Ames mutagenicity of 15 aryl, benzyl, and aliphatic ring N-nitrosamines 15种芳基、苄基和脂肪环n -亚硝胺的Ames诱变性。
IF 3 4区 医学 Q1 MEDICINE, LEGAL Pub Date : 2025-02-01 DOI: 10.1016/j.yrtph.2024.105763
Ayako Furuhama , Kei-ichi Sugiyama , Masamitsu Honma
The Ames mutagenicity test is an effective means of screening compounds for their carcinogenic potential. Here, we conducted Ames tests on 15 aryl, benzyl, and aliphatic ring N-nitrosamines. Then, by using two indicators of mutagenicity strength calculated from the Ames test results, namely, maximum specific activity (MSA; number of revertant colonies) and maximum fold increase (MFI; relative ratio of increased colonies), we examined the relationship between Ames mutagenicity strength and Carcinogenic Potency Categorization Approach (CPCA) potency category, which is a structure–activity-relationship–based prediction of the carcinogenic potency of nitrosamines. Eleven of the test compounds were Ames positive and four were negative. Of the 11 positive compounds, three were categorized as strong positive (MSA ≥1000), five as medium positive (100 ≤ MSA <1000), and three as weak positive (MSA <100). The compounds with an aliphatic ring showed a negative relationship between mutagenicity strength (i.e., MSA or MFI) and carcinogenic potential (i.e., CPCA category), whereas, the alpha-methyl aryl N-nitrosamines did not. Overall, MSA and MFI were found to be detailed indicators of the carcinogenic potency of the N-nitrosamines and can potentially be used to support CPCA categorization.
Ames诱变试验是筛选化合物致癌潜力的有效手段。在这里,我们对15个芳基、苄基和脂肪环n -亚硝胺进行了Ames测试。然后,利用Ames试验结果计算的两个致突变性强度指标,即最大比活性(MSA);复归菌落数)和最大倍数增加(MFI;),我们研究了Ames诱变强度与致癌效能分类方法(Carcinogenic Potency Categorization Approach, CPCA)效能类别之间的关系,CPCA是一种基于结构-活性关系的亚硝胺致癌效能预测方法。11个测试化合物为Ames阳性,4个为阴性。11个阳性化合物中,3个为强阳性(MSA≥1000),5个为中阳性(100≤MSA < 1000), 3个为弱阳性(MSA < 100)。含有脂肪环的化合物在致突变性强度(即MSA或MFI)和致癌潜力(即CPCA类别)之间呈负相关,而α -甲基芳基n -亚硝胺则没有。总的来说,MSA和MFI是n -亚硝胺致癌性的详细指标,可能用于支持CPCA分类。
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引用次数: 0
PBT/PMT assessment of active pharmaceutical ingredients 有效药物成分的PBT/PMT评价。
IF 3 4区 医学 Q1 MEDICINE, LEGAL Pub Date : 2025-02-01 DOI: 10.1016/j.yrtph.2025.105772
Gemma Janer , Joanne Elmoznino , Andreas Häner , Irene Bramke
The EU Commission proposal for a new EU pharmaceutical legislation considers PBT (persistence-bioaccumulation-toxicity) and PMT (persistence-mobility-toxicity) criteria for pharmaceuticals. Under current environmental risk assessment guidance, a PBT assessment is required regardless of the predicted environmental concentrations. However, consumption volumes of pharmaceuticals are contingent on marketing approval by EMA and are therefore predictable and their toxicological potency is established prior to any regulatory approval. Consumption volume and toxicological potency of pharmaceuticals span many orders of magnitude and are strong risk determinants. Routine data generation to evaluate persistence, mobility and bioaccumulation hazards as a means of pinpointing pharmaceuticals of increased environmental concern is therefore of questionable added value.
We present options to derive action triggers for PBT and/or PMT screening using exposure predictions and toxicological potency data. Our simulations demonstrate that an exposure-based action limit can be established as a trigger for PMT assessment, while a combined trigger based on exposure levels and mammalian toxicity is proposed for PBT assessment. The proposed approach is conservatively designed to ensure that compounds with any potential risks a) of secondary poisoning (main concern for PBT substances) and b) to groundwater/drinking water (main concern for PMT substances) are targeted for full evaluation.
欧盟委员会提出了一项新的欧盟制药立法,考虑了药品的PBT(持久性-生物积累-毒性)和PMT(持久性-流动性-毒性)标准。根据目前的环境风险评估指导,无论预测的环境浓度如何,都需要进行PBT评估。然而,药品的消费量取决于EMA的上市批准,因此是可预测的,其毒理学效力在任何监管批准之前就已确定。药品的消费量和毒理学效力跨越许多数量级,是强有力的风险决定因素。因此,为评价持久性、移动性和生物蓄积性危害而产生的常规数据,作为确定日益引起环境关注的药物的手段,其附加价值值得怀疑。我们提出了使用暴露预测和毒理学效力数据来获得PBT和/或PMT筛查的行动触发因素的选择。我们的模拟表明,基于暴露的作用限值可以作为PMT评估的触发因素,而基于暴露水平和哺乳动物毒性的组合触发因素可以用于PBT评估。拟议的方法设计保守,以确保具有任何潜在风险的化合物a)二次中毒(主要关注PBT物质)和b)地下水/饮用水(主要关注PMT物质)是全面评估的目标。
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引用次数: 0
Comprehensive extractables and leachables sensitization analysis and practical application of a risk-based approach to sensitization assessment for parenteral drug products
IF 3 4区 医学 Q1 MEDICINE, LEGAL Pub Date : 2025-01-28 DOI: 10.1016/j.yrtph.2025.105776
Patricia Parris , Geraldine Whelan , Martyn L. Chilton , Claire Beaumont , Anders Burild , Uma Bruen , Courtney Callis , Jessica Graham , Natalia Kovalova , Elizabeth A. Martin , Melisa Masuda-Herrera , Carsten Worsøe , Anissa Alami , Joel Bercu , Dvir Doron , Kristen Dusenbury , Qiang Fu , Troy Griffin , Jedd Hillegass , Esther Johann , Lee Nagao
The Extractables and Leachables Safety Information Exchange (ELSIE) Consortium added to the sensitization potency analysis of Parris et al. (2023) by including the Product Quality Research Institute (PQRI) extractable and leachable dataset (Johnson et al., 2024; Product Quality Research Institute, 2021). This analysis of the comprehensive E&L dataset showed 5% of chemicals (20/407) had experimental results demonstrating or were predicted to be potent (strong or extreme) sensitizers, supporting the previous conclusion, that potent sensitizers are of low prevalence and are not routinely observed as leachables in pharmaceutical products. By accounting for prevalence of sensitization in the overall E&L dataset, the probability of any potential leachable being more potent than the less than lifetime ICH M7 (10, 20, and 120 μg/day for human exposure of >1–10 years, >1–12 months, and <1 month respectively) and non-mutagenic ELSIE threshold values (35, 110, and 180 μg/day for human exposures of >10 years to lifetime, >1–10 years, and ≤1 year respectively) (Masuda-Herrera et al., 2022) was considered. The M7 and ELSIE thresholds are anticipated to provide ≥95% coverage of induction of sensitization, supporting the use of these thresholds to set the Safety Concern Threshold (SCT).
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引用次数: 0
Control performance of Amphibian Metamorphosis Assays with Xenopus laevis 非洲爪蟾防治两栖动物变态试验的效果。
IF 3 4区 医学 Q1 MEDICINE, LEGAL Pub Date : 2025-01-18 DOI: 10.1016/j.yrtph.2025.105773
James R. Wheeler , Raechel Puglisi , Adriana C. Bejarano , Zhenglei Gao , Laurent Lagadic , Scott Glaberman , Constance A. Mitchell , Natalie Burden , Valentin Mingo , Scott G. Lynn , Michelle R. Embry
The amphibian metamorphosis assay (AMA) is an in vivo screen to assess potential interactions of chemicals with the amphibian thyroid system. Tadpoles are exposed for 21-days, then assessed for development and growth after 7 days and at test termination. This paper presents data from studies performed to satisfy test orders from the US EPA's Endocrine Disruptor Screening Program. Data Evaluation Records were used to collate the control variability and performance of biological endpoints in AMAs conducted in different laboratories, then supplemented with recent studies. We examine the statistical power of AMA endpoint analysis and assess whether historical control data (HCD) can assist evidence-based interpretation of the endpoints, with 52 studies from 7 different laboratories. HCD can be used to understand assay performance post validation. The analysis identifies some need for flexibility in the interpretation of the Test Guidelines' performance criteria, including latitude with analytical variability and statistical analysis of late-stage animals. Additionally, more guidance is suggested for feed regiments and the selection criteria for batches of animals to initiate the assay. Potential Guideline refinements that improve interpretation of the data and have potential to reduce the number of vertebrate animals used in the conduct of AMAs are identified and discussed.
两栖动物变态试验(AMA)是一种体内筛选,以评估化学物质与两栖动物甲状腺系统的潜在相互作用。蝌蚪暴露21天,然后在7天后和试验结束时评估发育和生长情况。本文介绍了为满足美国环境保护局内分泌干扰物筛选计划的测试要求而进行的研究数据。数据评估记录用于整理在不同实验室进行的ama生物终点的控制变异性和性能,然后补充最近的研究。我们通过来自7个不同实验室的52项研究,检验了AMA终点分析的统计能力,并评估了历史对照数据(HCD)是否有助于对终点的循证解释。HCD可用于了解验证后的分析性能。该分析确定了在解释《试验指南》的性能标准方面需要一些灵活性,包括具有分析变异性的纬度和后期动物的统计分析。此外,建议对饲料团和开始试验的动物批次的选择标准提供更多指导。确定并讨论了潜在的指南改进,以改进对数据的解释,并有可能减少用于进行ama的脊椎动物的数量。
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引用次数: 0
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Regulatory Toxicology and Pharmacology
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