Cancer development, progression, and therapy: an epigenetic overview

Area of Science:

• Oncology
• Epigenetics
• Molecular Biology

Background:

• Carcinogenesis involves oncogene activation and tumor suppressor gene deactivation, leading to uncontrolled cell growth.
• Metastasis requires changes in cell adhesion and motility, often involving receptor regulation.
• Epigenetic modifications like DNA methylation and histone changes influence cancer progression.

Purpose of the Study:

• To explore the role of epigenetic alterations in cancer development, from progenitor cells to metastasis.
• To investigate how epigenetic changes affect key cellular processes like cell adhesion, motility, apoptosis, and autophagy.
• To highlight the therapeutic potential of targeting epigenetic mechanisms in cancer treatment.

Main Methods:

• The study proposes a model of cancer development involving epigenetic control of cell transformation and epithelial-mesenchymal transition.
• It reviews the impact of epigenetic modifications on signaling pathways and microRNAs.
• It discusses the therapeutic strategies involving epigenetic drugs and their mechanisms of action.

Main Results:

• Epigenetic changes are proposed to drive the conversion of normal cells to cancer progenitor cells and facilitate metastasis.
• Epigenetic modifications influence pathways regulating apoptosis, autophagy, and microRNA expression.
• Epigenetic drugs can re-express tumor suppressor genes, inhibit cancer growth, and reduce recurrence.

Conclusions:

• Epigenetic alterations are crucial in cancer initiation, progression, and metastasis.
• Targeting epigenetic mechanisms with drugs offers a promising therapeutic approach, potentially enhancing traditional treatments.
• Recognizing epigenetic alteration as a hallmark of cancer will spur the development of new biomarkers and therapies.