Senescence, apoptosis and therapy--cutting the lifelines of cancer
1Max-Delbrück-Center for Molecular Medicine and Charité/Campus Virchow-Hospital, Department of Hematology/Oncology, Humboldt University, 13353 Berlin, Germany. clemens.schmitt@charite.de
Nature Reviews. Cancer
|April 3, 2003
Abstract:
Apoptosis and senescence are cellular failsafe programmes that counteract excessive mitogenic signalling from activated oncogenes. Cancellation of apoptosis or senescence is therefore a prerequisite for tumour formation, and the ability of the cancer cell to disrupt these processes can be considered its 'lifeline'. Ironically, the efficacy of anticancer agents also depends on the activation of apoptosis or an acutely inducible form of cellular senescence. Understanding how the 'lifelines' of the cancer cell interfere with treatment sensitivity is of crucial importance for developing safer and more effective treatment strategies.
Insights
Cancer cells use
Area of Science:
- Cellular biology
- Oncology
- Cancer research
Background:
- Apoptosis and senescence are critical cellular defense mechanisms against oncogenic signaling.
- Tumor formation requires cancer cells to evade or cancel these protective programs, termed their 'lifelines'.
- Anticancer treatments often rely on inducing apoptosis or cellular senescence for efficacy.
Purpose of the Study:
- To investigate how cancer cell 'lifelines' impact sensitivity to anticancer therapies.
- To understand the mechanisms by which cancer cells disrupt apoptosis and senescence.
- To identify strategies for overcoming treatment resistance mediated by these cellular programs.
Main Methods:
- Review of existing literature on apoptosis, senescence, and cancer biology.
- Analysis of signaling pathways involved in oncogene-induced cell death and survival.
- Examination of cancer cell adaptation mechanisms to therapeutic interventions.
Main Results:
- Cancer cells actively suppress apoptosis and senescence to survive and proliferate.
- The disruption of these failsafe mechanisms is essential for tumor initiation and progression.
- Therapeutic strategies that effectively target cancer cell 'lifelines' show promise.
Conclusions:
- Understanding cancer cell 'lifelines' is key to developing more effective cancer treatments.
- Interfering with apoptosis and senescence evasion pathways can re-sensitize tumors to therapy.
- Targeting these fundamental cancer cell survival mechanisms offers a promising avenue for novel therapeutic development.
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