Imaging of caspase-3 activation in HeLa cells stimulated with etoposide using a novel fluorescent probe

Shin Mizukami, Kazuya Kikuchi, Tsunehiko Higuchi, Yasuteru Urano, Tetsuo Mashima, Takashi Tsuruo, Tetsuo Nagano

Research output: Contribution to journalArticlepeer-review

101 Citations (Scopus)

Abstract

Microscopic visualization of intracellular enzyme activity can provide information about the physiological role of the enzyme. Caspases are cysteine proteases that have critical roles in the execution of apoptosis. General fluorometric substrates of caspase-3, such as DEVD-MCA, are unsuitable for imaging because they are excited at short wavelength, so we designed and synthesized novel fluorescent probes that are excited at suitable wavelengths for detecting caspase-3 activity in living cells. Using one of these probes, we succeeded in microscopic visualization of caspase-3-like activity within HeLa cells treated with etoposide. The caspase-3-like activity was increased in the cytosol at first, then expanded to the whole cell.

Original languageEnglish
Pages (from-to)356-360
Number of pages5
JournalFEBS Letters
Volume453
Issue number3
DOIs
Publication statusPublished - 1999 Jun 25

Keywords

  • Apoptosis
  • Caspase-3
  • Fluorescence
  • Imaging

ASJC Scopus subject areas

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology

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