NDLI: Apoptosis induced by direct triggering of mitochondrial apoptosis proceeds in the near-absence of some apoptotic markers

Content Provider	Springer Nature Link
Author	Ying, Songmin Häcker, Georg
Copyright Year	2007
Abstract	Apoptotic cell death is characterized by the activation of the apoptotic signal transduction pathway on one hand and a number of regularly found morphological and biochemical features, such as nuclear condensation and mitochondrial depolarisation. Although much of our knowledge of apoptosis was obtained using noxious stimuli in cell culture, these apoptotic stimuli are likely to have numerous off-target effects that may contribute to or obscure the immediate effects of the apoptotic pathway. We have developed a cellular model where mitochondrial apoptosis is directly triggered by the tetracycline-regulated expression of the pro-apoptotic BH3-only protein BimS. We report the comparison of BimS-induced apoptosis with the commonly used apoptotic stimuli staurosporine and UV-light. While the release of mitochondrial cytochrome c and Smac/DIABLO, activation of caspases and nuclear morphological changes occurred with very similar kinetics, striking differences were found in other apoptotic assays. In particular, drop in mitochondrial membrane potential, loss of plasma membrane integrity and the appearance of sub-G1 nuclei were strongly reduced in cells dying upon BimS-induction, compared to staurosporine- or UV-induced apoptosis. The results thus indicate that the link between the apoptotic pathway and commonly used indicators of apoptosis is less tight than it appears from experiments with cytotoxic stimuli.
Starting Page	2003
Ending Page	2011
Page Count	9
File Format	PDF
ISSN	13608185
Journal	Apoptosis
Volume Number	12
Issue Number	11
e-ISSN	1573675X
Language	English
Publisher	Springer US
Publisher Date	2007-08-14
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bim Mitochondria Apoptotic markers Momp Caspases Virology Biochemistry Oncology Cell Biology Cancer Research
Content Type	Text
Resource Type	Article
Subject	Pharmaceutical Science Biochemistry (medical) Cell Biology Clinical Biochemistry Cancer Research Pharmacology

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