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Updated: Jun 6, 2026

An Organotypic High Throughput System for Characterization of Drug Sensitivity of Primary Multiple Myeloma Cells
Published on: July 15, 2015
Environmental-mediated drug resistance: a target for multiple myeloma therapy
Kenneth H Shain1, William S Dalton
1Departments of Experimental Therapeutics and Oncologic Sciences, H. Lee Moffitt Cancer Center and Research Institute, University of South Florida, 12902 Magnolia Drive, Tampa, FL 33612, USA. ken.shain@moffitt.org
Abstract:
Multiple myeloma is an incurable malignancy of mature clonal B cells. The refractory nature of this disease has long been attributed to the acquisition of drug resistance. Traditionally, mechanisms of drug resistance have been defined by genetic, acquired changes in the expression or function of specific genes products. However, over the past 10 years a large body of evidence has emerged demonstrating that in addition to mechanisms of drug resistance intrinsic to the cancer cell, there exist dynamic, de novo mechanisms coordinated by the tumor microenvironment resulting in a environmental-mediated drug resistance (EM-DR). Within this review we will provide an overview of some of these mechanisms of drug resistance and how they contribute to minimal residual disease and subsequent treatment failure. By understanding mechanisms of EM-DR, therapeutic targets can be identified and interventions designed to reduce minimal residual disease and improve clinical outcomes.
Insights
Multiple myeloma drug resistance is not just from cancer cell changes. The tumor microenvironment creates new resistance mechanisms, leading to treatment failure and persistent disease.
Area of Science:
- Hematology
- Oncology
- Cancer Biology
Background:
- Multiple myeloma is an incurable B-cell malignancy.
- Drug resistance is a key factor in its refractory nature.
- Traditionally, resistance was linked to genetic changes within cancer cells.
Purpose of the Study:
- To review emerging evidence on environmental-mediated drug resistance (EM-DR) in multiple myeloma.
- To explain how tumor microenvironment dynamics contribute to treatment failure.
- To highlight the role of EM-DR in minimal residual disease.
Main Methods:
- Literature review of recent studies on multiple myeloma drug resistance.
- Analysis of mechanisms involving the tumor microenvironment.
- Synthesis of findings on EM-DR and its clinical implications.
Main Results:
- Emerging evidence points to dynamic, de novo resistance mechanisms coordinated by the tumor microenvironment.
- Environmental-mediated drug resistance (EM-DR) contributes significantly to treatment failure.
- EM-DR plays a crucial role in the persistence of minimal residual disease.
Conclusions:
- Understanding EM-DR is critical for overcoming treatment resistance in multiple myeloma.
- Targeting the tumor microenvironment offers new therapeutic strategies.
- Interventions reducing EM-DR could improve outcomes and reduce minimal residual disease.
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