DNA Damage Response in Multiple Myeloma: The Role of the Tumor Microenvironment

Area of Science:

• Oncology
• Genetics
• Molecular Biology

Background:

• Multiple myeloma (MM) is an incurable plasma cell cancer marked by significant genomic instability.
• MM cells exhibit diverse genetic instabilities, including chromosomal aberrations and base-pair alterations.
• The tumor microenvironment and impaired DNA repair contribute to MM's genetic instability.

Purpose of the Study:

• To review DNA repair pathways and their specific roles in multiple myeloma.
• To explore how the tumor microenvironment influences DNA repair mechanisms in MM.
• To connect genomic instability, DNA repair, and MM progression/drug resistance.

Main Methods:

• Literature review of DNA repair pathways in multiple myeloma.
• Analysis of the impact of the tumor microenvironment on DNA damage response.
• Synthesis of information on genomic instability and its consequences in MM.

Main Results:

• Genomic instability in MM arises from chromosomal instability, microsatellite instability, and base-pair alterations.
• Tumor microenvironment factors like inflammation and hypoxia modulate DNA damage response pathways.
• Unrepaired DNA damage exacerbates genomic instability, driving MM progression and drug resistance.

Conclusions:

• DNA repair pathways are critical in managing genomic instability in multiple myeloma.
• The tumor microenvironment significantly influences DNA repair, impacting disease progression.
• Targeting DNA repair mechanisms and the microenvironment may offer new therapeutic strategies for MM.