A multiple technical approach to the study of apoptotic cell micronuclei

M. Columbaro, P. Gobbi, F. Renò, F. Luchetti, S. Santi, A. Valmori, E. Falcieri

Research output: Contribution to journalArticlepeer-review


Apoptotic micronuclei have been studied, in different cell types, from a morphologic and functional point of view. Conventional electron microscopy, in various staining conditions, selective cytochemistry for DNA, and freeze fracture for the analysis of chromatin fiber organization and size were performed. In situ TdT and Pol I immunofluorescent techniques were carried out to detect double- and single-strand DNA breaking points by confocal laser scanning microscopy. Apoptotic cell ultrathin cryosections were also performed and were analysed by field emission in lens scanning electron microscopy. Double/single strand massively cleaved DNA was detected in micronuclei, with a highly supercoiled, uniformly packed, very dense arrangement.

Original languageEnglish
Pages (from-to)541-548
Number of pages8
Issue number8
Publication statusPublished - Nov 1998


  • Apoptosis
  • Electron microscopy
  • Field emission in lens scanning electron microscopy
  • In situ DNA labelling
  • Micronuclei

ASJC Scopus subject areas

  • Instrumentation


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