Hybrid cell death induced by exposure to 2-hydroxyethyl methacrylate (HEMA): an ultrastructural and X-ray microanalytical study.

Abstract:

Purpose: The aim of this study was to evaluate the ultrastructural characteristics and ionic profile of U937 cells after exposure to 2-hydroxyethyl methacrylate (HEMA) to shed light on the cytotoxicity of this dental adhesive and its relation to mechanisms of cell death. Materials and Methods: U937 human monoblastic cells were incubated in RPMI 1640 culture medium and exposed to HEMA at LD50. Structural changes after 5, 15, 30, 60, and 120 min were observed with transmission electron microscopy. Ionic content of Na, K, Cl, Mg, P and S was evaluated by quantitative electron probe X-ray microanalysis. Results: Our results in human monoblastic cell line U937 establish that exposure to HEMA at LD50 led to a singular mechanism of cell death characterized by changes in the morphology and ultrastructure of the cells (cell size, blebs, and organelle structure) compatible with apoptosis, but without changes in nuclear …

Año de publicación:

2008

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