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Mucosal irritation

973

In vitro -in vivo assay validation for vaginal irritation of chemicals

 The goal of the study is to validate the utility of the 3D human in vitro vaginal tissue model as an alternate for rabbit vaginal irritation using a set of coded test articles (TAs). A double-blinded study was conducted in which the investigator and the animal testing facility were provided with N=14 coded TAs and […]
934

Low-temperature plasma on peri-implant-related biofilm and gingival tissue

Background: Evaluate the effect of low-temperature plasma (LTP) on an anaerobic biofilm and on the biological response of an in vitro reconstituted gingival epithelium tissue. Methods: Porphyromonas gingivalis W83 biofilm was cultured on titanium discs and reconstituted gingival tissues were submitted to similar treatment conditions. Treatments: LTP1—plasma treatment for 1 minute, LTP3—plasma treatment for 3 […]
841

Hyperosmolal vaginal lubricants markedly reduce epithelial barrier properties in a three-dimensional vaginal epithelium model

Most of the widely used vaginal lubricants in the U.S. and Europe are strongly hyperosmolal, formulated with high concentrations of glycerol, propylene glycol, polyquaternary compounds or other ingredients that make these lubricants 4 to 30 times the osmolality of healthy vaginal fluid. Hyperosmolal formulations have been shown to cause marked toxicity to human colorectal epithelia in vivo, and […]
811

Systems Toxicology Assessment of the Biological Impact of a Candidate Modified Risk Tobacco Product on Human Organotypic Oral Epithelial Cultures

Cigarette smoke (CS) has been reported to increase predisposition to oral cancer and is also recognized as a risk factor for many conditions including periodontal diseases, gingivitis, and other benign mucosal disorders. Smoking cessation remains the most effective approach for minimizing the risk of smoking-related diseases. However, reduction of harmful constituents by heating rather than combusting tobacco, without modifying the amount […]
799

In vitro systems toxicology approach to investigate the effects of repeated cigarette smoke exposure on human buccal and gingival organotypic epithelial tissue cultures

Smoking has been associated with diseases of the lung, pulmonary airways and oral cavity. Cytologic, genomic and transcriptomic changes in oral mucosa correlate with oral preneoplasia, cancer and inflammation (e.g. periodontitis). Alteration of smoking-related gene expression changes in oral epithelial cells is similar to that in bronchial and nasal epithelial cells. Using a systems toxicology approach, we have previously […]
683

UPDATE ON VALIDATION STATUS AND INDUSTRY UTILIZATION OF NORMAL HUMAN 3D (NHU-3D) ANIMAL ALTERNATIVE MODELS.

Progress in in vitro tissue engineering over the last several decades has contributed to a significant decrease in animal use for industrial risk and safety assessment of products and ingredients. Mattek Corporation has a long-standing involvement in development, production and validation of animal alternative in vitro models produced from normal human cells (NHu-3D models). The […]
611

IN VITRO ASSESSMENT OF PERSONAL CARE PRODUCTS FOR VAGINAL IRRITATION USING 3D TISSUE CONSTRUCTS.

Three dimensional (3D) human vaginal-ectocervical tissue constructs may be a relevant in vitro model to rapidly screen for vaginal mucosal irritation potential of raw materials and final formulations. Here we report results from a study with an in vitro vaginal tissue construct (EpiVaginal™ from Mattek Corporation, USA), used to predict irritation responses of a variety […]
670

IN VITRO EFFECTS OF ETHANOL AND MOUTHRINSE ON PERMEABILITY IN AN ORAL BUCCAL MUCOSAL TISSUE CONSTRUCT.

The current study investigated the influence of ethanol and ethanol-containing mouthrinses on model chemical permeability in an in vitro oral buccal mucosal construct (EpiOral, ORL-200, Mattek). Innate ethanol transport and metabolism in the tissue construct was also studied. First we investigated effects of up to 26.9% ethanol and two Listerine products on permeability of buccal […]