Deciphering the bone marrow microenvironment's role in multiple myeloma immunotherapy resistance

Area of Science:

• Hematology
• Immunology
• Oncology

Background:

• Multiple Myeloma (MM) is a plasma cell malignancy.
• The bone marrow (BM) microenvironment is crucial for MM progression.
• MM pathogenesis involves intricate cellular and non-cellular interactions within the BM.

Purpose of the Study:

• To review BM microenvironment alterations in MM patients.
• To elucidate how BM microenvironment contributes to immunotherapy resistance.
• To discuss implications for novel therapeutic strategies.

Main Methods:

• Literature review of MM and BM microenvironment interactions.
• Analysis of cellular and non-cellular components of the BM.
• Examination of immunotherapy resistance mechanisms.

Main Results:

• The BM microenvironment significantly impacts MM progression and drug response.
• Perturbations in the BM microenvironment are linked to resistance against immunotherapies.
• Specific cellular and non-cellular components mediate resistance to monoclonal antibodies, CAR-T cells, and bispecific T-cell engagers.

Conclusions:

• The BM microenvironment is a key factor in MM treatment failure.
• Targeting the BM microenvironment may overcome immunotherapy resistance.
• Understanding these interactions is vital for improving MM patient outcomes.