Molecular Mechanisms Underlying Autophagy-Mediated Treatment Resistance in Cancer

Area of Science:

• Oncology
• Cell Biology
• Molecular Biology

Background:

• Treatment resistance is a significant challenge in cancer therapy, limiting the efficacy of existing treatments.
• Autophagy, a cellular degradation and recycling pathway, has been implicated in promoting resistance to various cancer therapies.
• Existing knowledge on the precise molecular mechanisms linking autophagy to treatment resistance is limited.

Purpose of the Study:

• To comprehensively summarize the evidence connecting autophagy to major signaling pathways involved in treatment resistance and tumor progression.
• To highlight recently identified molecular mechanisms underlying autophagy's role in chemoresistance, focusing on specific signaling axes.

Main Methods:

• Literature review and synthesis of existing research on autophagy and cancer treatment resistance.
• Analysis of signaling pathways, including MAPK, PI3K/AKT, p62/KEAP1/NRF2, and FOXO3A/PUMA, in the context of autophagy.
• Focus on molecular mechanisms driving autophagy-mediated chemoresistance.

Main Results:

• Autophagy is linked to resistance against chemotherapies and targeted therapies through associations with signaling pathways like MAPK and PI3K/AKT.
• Emerging evidence points to specific molecular mechanisms involving the p62/KEAP1/NRF2 and FOXO3A/PUMA pathways in mediating autophagy-dependent chemoresistance.
• Autophagy plays a role in tumor progression alongside treatment resistance.

Conclusions:

• Autophagy is a key mediator of treatment resistance in various cancer types.
• Further elucidation of molecular mechanisms, particularly the p62/KEAP1/NRF2 and FOXO3A/PUMA axes, is essential for overcoming autophagy-driven chemoresistance.
• Targeting autophagy pathways may offer novel therapeutic strategies to enhance cancer treatment efficacy.