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Staurosporine induces apoptotic volume decrease (AVD) in ECV304 cells
A M Porcelli1, A Ghelli, C Zanna
1Dipartimento di Biologia Ev. Sp., Dipartimento di Fisiologia Umana e Generale, Universita di Bologna, 40126 Bologna, Italy. porcelli@alma.unibo.it
Abstract:
Incubation of ECV304 cells with 1 micro M staurosporine (STS) causes apoptotic cell death. In the present study, we investigate whether a significant apoptotic volume decrease (AVD) was apparent during the very early times (1 h) of the apoptotic process. Our data suggest that upregulation of Cl(-) (and possibly K(+)) channels by STS may be a very early primary event required for the subsequent onset of AVD, which results in apoptosis.
Insights
Staurosporine (STS) induces cell death by triggering apoptotic volume decrease (AVD). Early activation of chloride and potassium channels by STS is crucial for initiating AVD and subsequent apoptosis.
Area of Science:
- Cell Biology
- Molecular Biology
- Biochemistry
Background:
- Apoptosis is a regulated process of cell death.
- Apoptotic volume decrease (AVD) is a hallmark of apoptosis.
- The early molecular events triggering AVD remain incompletely understood.
Purpose of the Study:
- To investigate the temporal relationship between early cellular events and AVD.
- To determine if ion channel activity is involved in the early stages of STS-induced apoptosis.
- To explore the role of chloride and potassium channels in AVD.
Main Methods:
- ECV304 cells were treated with staurosporine (STS).
- Apoptotic volume decrease (AVD) was monitored at early time points (1 hour).
- Changes in ion channel activity were inferred from cellular volume changes.
Main Results:
- STS treatment at 1 micro M induced apoptotic cell death.
- A significant apoptotic volume decrease (AVD) was observed as early as 1 hour post-treatment.
- Data suggest STS upregulates Cl(-) and possibly K(+) channels early in the process.
Conclusions:
- Upregulation of Cl(-) and K(+) channels by STS is an early event in apoptosis.
- This early ion channel activation is likely required for the onset of AVD.
- Early ion channel modulation plays a critical role in initiating STS-induced apoptotic cell death.
