SkinEthic HCE Time-to-Toxicity on solids: A test method for distinguishing chemicals inducing serious eye damage, eye irritation and not requiring classification and labelling.

This study describes the development of a Time-to-Toxicity approach for solids (TTS) based on the SkinEthic™ HCE tissue construct, capable to distinguish chemicals that do not require classification for serious eye damage/eye irritation (No Cat.) from chemicals that require classification for eye irritation (Cat. 2), and serious eye damage (Cat.

The EyeIRR-IS assay: Development and evaluation of an in vitro assay to measure the eye irritation sub-categorization of liquid chemicals.

Several alternative methods have been developed and regulatory adopted by OECD as in vitro alternatives to the Draize eye irritation assay either to detect chemicals not requiring classification (No Category) or inducing serious damage to the eye (Category 1) but none are sensitive enough to identify chemicals inducing reversible eye effects (category 2) which are categorised by default. Therefore, the discriminatory power of a genomic approach applied to the SkinEthic™ Human Corneal Epithelium (HCE) model was investigated to allow subcategorization capacity according to UN GHS classification. An algorithm based on gene expression modulation on a training (62) and a test (31 liquids) chemical set, tested neat and at 30%was evaluated in an assay called EyeIRR-IS.

Development of the SkinEthic HCE Time-to-Toxicity test method for identifying liquid chemicals not requiring classification and labelling and liquids inducing serious eye damage and eye irritation.

This study describes the development of a Time-to-Toxicity approach for liquids (TTL) based on the SkinEthic™ HCE tissue construct, capable to distinguish chemicals that do not require classification for serious eye damage/eye irritation (No Cat.) from chemicals that require classification for eye irritation (Cat. 2), and serious eye damage (Cat.

SkinEthic™ HCE Eye Irritation Test: Similar performance demonstrated after long distance shipment and extended storage conditions.

Assessment of ocular irritation risk is an international regulatory requirement in the safety evaluation of products. In response to this need, L'Oréal developed the SkinEthic™ Human Corneal Epithelium (HCE) Eye Irritation Test (EIT) that has been included in OECD Test Guideline 492. SkinEthic™ HCE EIT is able to correctly and reliably identify chemicals not requiring classification versus labelling for eye irritation or serious eye damage according to UN GHS.

PrPTSE distribution in a primate model of variant, sporadic, and iatrogenic Creutzfeldt-Jakob disease.

Human prion diseases, such as Creutzfeldt-Jakob disease (CJD), are neurodegenerative and fatal. Sporadic CJD (sCJD) can be transmitted between humans through medical procedures involving highly infected organs, such as the central nervous system. However, in variant CJD (vCJD), which is due to human contamination with the bovine spongiform encephalopathy (BSE) agent, lymphoreticular tissue also harbors the transmissible spongiform encephalopathy-associated prion protein (PrP(TSE)), which poses a particularly acute risk for iatrogenic transmission.

Homogeneous time-resolved fluorescence assay for identifying p53 interactions with its protein partners, directly in a cellular extract.

The p53 protein is a tumor suppressor that protects the organism against malignant consequences of DNA damage. Interaction of p53 with numerous cellular or viral proteins regulates its functional activity either positively or negatively. An approach leading to identification of such protein interactions directly in a cell extract could be of help in the development of screening assays to search for drugs acting on p53 in its cellular environment, either by disrupting its association with inhibitory proteins or by increasing its affinity for activating proteins.