Keratinocyte toxicity

Keratinocyte toxicity is a pathological state characterized by the damage, dysfunction, or death of keratinocytes, which constitute approximately 90% of the epidermal layer of the skin (NIH, 2023). This condition is not a molecular target but rather a toxicological endpoint or adverse effect resulting from chemical exposure, radiation, or immune-mediated reactions (StatPearls, 2024). In the context of pharmacology, it is frequently observed as a side effect of targeted therapies, such as Epidermal Growth Factor Receptor (EGFR) inhibitors and BRAF inhibitors, which interfere with essential signaling pathways for keratinocyte survival and differentiation (PubMed, 2022). Severe manifestations include Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN), where widespread keratinocyte apoptosis leads to life-threatening skin detachment (Journal of Investigative Dermatology, 2021). Monitoring keratinocyte viability and inflammatory cytokine release is a standard component of preclinical safety screening for topical and systemic drug candidates (PubChem, 2023). Understanding the molecular pathways of keratinocyte death is crucial for mitigating the dermatological side effects of systemic therapies and maintaining the skin's vital barrier function.

Other names

Epidermal toxicityCutaneous toxicityKeratinocyte cell deathSkin irritationDermatotoxicity

Not applicable; keratinocyte toxicity is a toxicological endpoint and not a therapeutic target.