Cytotoxic effect of bone cements in HL-60 cells: Distinction between apoptosis and necrosis

G. Ciapetti, D. Granchi, E. Cenni, L. Savarino, D. Cavedagna, A. Pizzoferrato

Research output: Contribution to journalArticlepeer-review

Abstract

Ten PMMA-based bone cements used in prosthetic surgery have been studied with respect to the induction of programmed cell death (i.e., apoptosis) in HL-60 cells, which are remarkably sensitive to various apoptotic stimuli. Annexin V binding and propidium iodide (PI) exclusion were the methods for detection of early apoptotic changes, while PI entry was considered as a marker of necrosis. Hoechst 33342 staining was used to detect DNA fragmentation and Alamar blue(TM) was applied to measure oxide-reduction activity of cells. The production of reactive oxygen species (ROS) related to cell damage was verified using dichlorofluorescein-diacetate (DCFH-DA) oxidation to DCF. Under our experimental conditions, the cements tested, for the most part, were not toxic to leukemic cells at 4 and 24 h. After 24 h, three cements were able to induce cell death, with two eliciting both apoptosis and necrosis, and one cement acting mainly via apoptosis. Both processes of cell death are likely to be mediated by the production of oxygen-free radicals. These findings provide potential leads for investigation into the molecular mechanisms of cell death, which are responsible for tissue damage by cements and intolerance of cemented prostheses. (C) 2000 John Wiley and Sons, Inc.

Original languageEnglish
Pages (from-to)338-345
Number of pages8
JournalJournal of Biomedical Materials Research
Volume52
Issue number2
Publication statusPublished - Nov 2000

Keywords

  • Apoptosis
  • Bone cement
  • HL 60 cells
  • Necrosis

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biomaterials

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