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NURA en Español
January 14, 2026IIVS and the Physicians Committee for Responsible Medicine co-organized a webinar series featuring Spanish-speaking experts on ocular irritation, three-dimensional models, and dermal sensitisation. Métodos alternativos en toxicidad ocular: avances, aplicaciones y aceptación regulatoria en Latinoamérica 10 April 2025 Dra. María Laura Gutiérrez Cultivos celulares 2D y 3D en el marco regulatorio Latinoamericano 22 May 2025 Dr. Andrés Pareja López Innovación en la Evaluación de la Sensibilización Cutánea: Fundamentos Científicos y Aplicación Regulatoria 18 June 2025 Dr. Argel Islas-Robles The recordings and materials can be found on the PCRM NURA website....
Webinar Series on the Use of In Silico Tools in Toxicology
January 14, 2026In silico models are computational tools that use chemical structure, biological data, and mechanistic knowledge to predict potential toxic effects. They can be used to rapidly assess large numbers of chemicals, integrate diverse data streams, and provide mechanistic insight that strengthens hazard assessments, thereby providing human-relevant information. This webinar series, co-organised by PETA Science Consortium International and the Institute for In Vitro Sciences, offered an “In Silico 101” style of presentations and case examples designed to provide participants with foundational knowledge...
Standards of Good Practices for the Conduct of In Vitro Toxicity Studies
December 19, 2025The field of in vitro toxicity studies presents the opportunity for great innovation while providing many scientific challenges. This chapter discusses implementing standards of good practice within in vitro laboratories as a way to address the problems caused by a lack of reproducibility of scientific work. This chapter serves as a practical resource for researchers striving to enhance the quality, reproducibility, and integrity of their laboratory work. It walks through points to consider in the set-up of the laboratory, reagent...
Advanced In Vitro Systems Available for Respiratory Toxicology
December 19, 2025Increasing concerns in respect to the transferability of data from animal studies to real human health effects further supported by established legal frameworks in many juridical areas have pushed the development of advanced in vitro models (Stucki et al., 2022). Such development of complex in vitro cell models based on human cells can clearly contribute to potentially replace ethically and often scientifically debatable in vivo studies (Clippinger et al., 2021; Stucki et al., 2022). Attempts to fill the existing gap...
Assessment of Phototoxicity Potential of Botanicals as Cosmetic Ingredients Using the In Vitro 3T3 Neutral Red Uptake Phototoxicity Test
December 19, 2025Cosmetics and personal care products are frequently formulated with botanical ingredients due to their beneficial properties, the nature of their composition, and consumers’ interest for products with more natural or organic profiles. Compounds that absorb light significantly and are in contact with the skin have potential to become phototoxic upon exposure to sunlight. Here we demonstrate that an in vitro test methodology, the 3T3 Neutral Red Uptake Phototoxicity Test (3T3 NRU PT), is an effective screening tool in evaluation of...
New Horizons in Skin Sensitization Assessment of Complex Mixtures: The Use of New Approach Methodologies Beyond Regulatory Approaches
December 19, 2025Skin sensitization is a complex biological process induced by a wide range of chemicals, from single molecules to complex mixtures and finished products. While single chemical entities were used to design and validate sophisticated safety assessment assays, complex chemistries have proven challenging to test in practice using these methods. These assays range from in silico and in chemico methods to cell-based and reconstructed tissues-based approaches and target the key events now grouped within the Adverse Outcome Pathway. We focused our analysis...
A Proof-of-Concept for Safety Evaluation of Inhalation Exposure to Known Respiratory Irritants Using In Vitro and In Silico Methods
December 19, 2025There is increased interest in developing non-animal test systems for inhalation exposure safety assessments. However, defined methodologies are absent for predicting local respiratory effects from inhalation exposure to irritants. The current study introduces a concept for applying in vitro and in silico methods for inhalation exposure safety assessment. Three in vitro systems, representing the upper (MucilAir™—nasal epithelial tissue) and lower (A549 cells and human precision-cut lung slices) human respiratory regions, were exposed to six respiratory irritants. These irritant exposures were...
New Approach Methodologies (NAMs) for the In Vitro Assessment of Cleaning Products for Respiratory Irritation: Workshop Report
August 22, 2025The use of in vitro new approach methodologies (NAMs) to assess respiratory irritation depends on several factors, including the speci cs of exposure methods and cell/tissue-based test systems. This topic was examined in the context of human health risk assessment for cleaning products at a 1-day public workshop held on 2 March 2023, organized by the American Cleaning Institute® (ACI). The goals of this workshop were to (1) review in vitro NAMs for evaluation of respiratory irritation, (2) examine different...
Evaluation of a Non-Animal Toolbox Informed by Adverse Outcome Pathways for Human Inhalation Safety
August 22, 2025This work evaluated a non-animal toolbox to be used within a next-generation risk assessment (NGRA) framework to assess chemical-induced lung effects using human upper and lower respiratory tract models, namely MucilAir -HF and EpiAlveolar systems, respectively....
Development of Preliminary Candidate Surface Guidelines for Air Force-Relevant Dermal Sensitizers Using New Approach Methodologies
August 22, 2025Allergic contact dermatitis (ACD) is an immunologic reaction to a dermal chemical ex-posure that, once triggered in an individual, will result in an allergic response following subsequent encounters with the allergen. Air Force epidemiological consultations have in-dicated that aircraft structural maintenance workers may experience ACD at elevated rates compared to other occupations. We aimed to better understand the utility of non-animal testing methods in characterizing the sensitization potential of chemicals used during Air Force operations by evaluating the skin sensitization...