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Apoptosis and therapy
1Cold Spring Harbor Laboratory, NY 11724, USA.
Abstract:
The dogma that antineoplastic treatments kill tumour cells by damaging essential biological functions has been countered by the notion that treatment itself initiates a programmed cellular response. This response often produces the morphological features of apoptosis and is determined by a network of proliferation and survival genes, some of which are differentially expressed in normal and malignant cells. Correspondingly, mutations that interfere with the initiation or execution of apoptosis may produce tumour-cell drug resistance. Remarkably, many of the genes that modulate apoptosis in response to cytotoxic drugs also affect apoptosis during tumour development; hence, the process of apoptosis provides a conceptual framework for understanding how cancer genes can influence the outcome of cancer therapy. Although the relative contribution of apoptosis to radiation and drug-induced cell death remains controversial, clinical studies have associated anti-apoptotic mutations with treatment failure. While careful preclinical and clinical studies will be necessary to resolve this point, our current understanding of apoptosis should facilitate the design of rational new therapies.
Insights
Antineoplastic treatments can trigger programmed cell death (apoptosis), influenced by gene networks. Understanding apoptosis is key to improving cancer therapy outcomes and overcoming drug resistance.
Area of Science:
- Oncology
- Cell Biology
- Molecular Biology
Background:
- The traditional view of cancer treatments causing cell death through damage is challenged.
- Emerging evidence suggests treatments can initiate programmed cell death, known as apoptosis.
- Gene networks regulating cell proliferation and survival play a crucial role in this response.
Purpose of the Study:
- To explore the role of apoptosis in cancer treatment response.
- To understand how genetic mutations affect apoptosis and drug resistance.
- To provide a framework for developing novel cancer therapies.
Main Methods:
- Review of existing literature on apoptosis and cancer therapy.
- Analysis of gene expression patterns in normal and malignant cells.
- Examination of clinical data linking anti-apoptotic mutations to treatment outcomes.
Main Results:
- Mutations affecting apoptosis can lead to tumor cell drug resistance.
- Genes modulating apoptosis in response to cytotoxic drugs are also involved in tumor development.
- Clinical studies show a correlation between anti-apoptotic mutations and treatment failure.
Conclusions:
- Apoptosis is a critical cellular process influencing cancer therapy efficacy.
- Targeting apoptosis pathways presents a promising strategy for novel cancer treatments.
- Further research is needed to fully elucidate the role of apoptosis in radiation and drug-induced cell death.