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Autophagy: A Potential Therapeutic Target to Tackle Drug Resistance in Multiple Myeloma

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Publisher

MDPI
DOI: 10.3390/ijms24076019

Keywords

autophagy; drug resistance; multiple myeloma

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Multiple myeloma, the second most prevalent hematologic malignancy, has seen increased survival rates due to novel drugs and combination therapies. However, drug resistance remains a significant issue, with autophagic activity playing a critical role. High mobility group box protein 1 (HMGB1)-dependent autophagy and proteasome suppression-induced autophagy have been found to contribute to drug resistance in multiple myeloma.
Multiple myeloma (MM) is the second most prevalent hematologic malignancy. In the past few years, the survival of MM patients has increased due to the emergence of novel drugs and combination therapies. Nevertheless, one of the significant obstacles in treating most MM patients is drug resistance, especially for individuals who have experienced relapses or developed resistance to such cutting-edge treatments. One of the critical processes in developing drug resistance in MM is autophagic activity, an intracellular self-digestive process. Several possible strategies of autophagy involvement in the induction of MM-drug resistance have been demonstrated thus far. In multiple myeloma, it has been shown that High mobility group box protein 1 (HMGB1)-dependent autophagy can contribute to drug resistance. Moreover, activation of autophagy via proteasome suppression induces drug resistance. Additionally, the effectiveness of clarithromycin as a supplemental drug in treating MM has been reported recently, in which autophagy blockage is proposed as one of the potential action mechanisms of CAM. Thus, a promising therapeutic approach that targets autophagy to trigger the death of MM cells and improve drug susceptibility could be considered. In this review, autophagy has been addressed as a survival strategy crucial for drug resistance in MM.

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