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Epigenetic Deregulation of Apoptosis in Cancers
Ezgi Ozyerli-Goknar1,2, Tugba Bagci-Onder1,2
1Brain Cancer Research and Therapy Laboratory, Koç University School of Medicine, Istanbul 34450, Turkey.
Abstract:
Cancer cells possess the ability to evade apoptosis. Genetic alterations through mutations in key genes of the apoptotic signaling pathway represent a major adaptive mechanism of apoptosis evasion. In parallel, epigenetic changes via aberrant modifications of DNA and histones to regulate the expression of pro- and antiapoptotic signal mediators represent a major complementary mechanism in apoptosis regulation and therapy response. Most epigenetic changes are governed by the activity of chromatin modifying enzymes that add, remove, or recognize different marks on histones and DNA. Here, we discuss how apoptosis signaling components are deregulated at epigenetic levels, particularly focusing on the roles of chromatin-modifying enzymes in this process. We also review the advances in cancer therapies with epigenetic drugs such as DNMT, HMT, HDAC, and BET inhibitors, as well as their effects on apoptosis modulation in cancer cells. Rewiring the epigenome by drug interventions can provide therapeutic advantage for various cancers by reverting therapy resistance and leading cancer cells to undergo apoptotic cell death.
Insights
Cancer cells evade apoptosis through genetic mutations and epigenetic changes. Epigenetic drugs targeting chromatin modifiers can restore apoptosis, offering new cancer therapy strategies.
Area of Science:
- Molecular Biology
- Cancer Biology
- Epigenetics
Background:
- Cancer cells evade programmed cell death (apoptosis) via genetic mutations and epigenetic alterations.
- Epigenetic modifications, including DNA and histone alterations, regulate genes involved in apoptosis.
- Chromatin-modifying enzymes play a crucial role in these epigenetic changes.
Purpose of the Study:
- To explore how epigenetic deregulation impacts apoptosis signaling in cancer.
- To review the role of chromatin-modifying enzymes in apoptosis evasion.
- To discuss the therapeutic potential of epigenetic drugs in modulating cancer cell apoptosis.
Main Methods:
- Review of scientific literature on epigenetics and apoptosis.
- Focus on the function of chromatin-modifying enzymes (DNMT, HMT, HDAC, BET).
- Analysis of epigenetic drug mechanisms and their impact on apoptosis.
Main Results:
- Epigenetic mechanisms are critical for cancer cells to evade apoptosis.
- Chromatin-modifying enzymes are key regulators of apoptosis signaling pathways.
- Epigenetic drugs demonstrate potential in re-sensitizing resistant cancer cells to apoptosis.
Conclusions:
- Targeting epigenetic modifications offers a promising therapeutic avenue for cancer treatment.
- Epigenetic drug interventions can overcome therapy resistance by inducing apoptosis.
- Rewiring the cancer epigenome can lead to effective apoptotic cell death.
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