HDAC6-Selective Inhibitor Overcomes Bortezomib Resistance in Multiple Myeloma

Although multiple myeloma (MM) patients benefit from standard bortezomib (BTZ) chemotherapy, they develop drug resistance, resulting in relapse. We investigated whether histone deacetylase 6 (HDAC6) inhibitor A452 overcomes bortezomib resistance in MM. We show that HDAC6-selective inhibitor A452 sig...

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Bibliographic Details
Published in:International journal of molecular sciences 2021-01, Vol.22 (3), p.1341
Main Authors: Lee, Sang Wu, Yeon, Soo-Keun, Kim, Go Woon, Lee, Dong Hoon, Jeon, Yu Hyun, Yoo, Jung, Kim, So Yeon, Kwon, So Hee
Format: Article
Language:English
Subjects:
Antineoplastic Agents - pharmacology
Benzene Derivatives - pharmacology
bortezomib
Bortezomib - pharmacology
bortezomib-resistance
carfilzomib
Cell Line, Tumor
Drug Resistance, Neoplasm - drug effects
HDAC6
HDAC6-selective inhibitor
Histone Deacetylase 6 - antagonists & inhibitors
Histone Deacetylase 6 - metabolism
Histone Deacetylase Inhibitors - pharmacology
Humans
multiple myeloma
Multiple Myeloma - drug therapy
Multiple Myeloma - metabolism
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Summary:Although multiple myeloma (MM) patients benefit from standard bortezomib (BTZ) chemotherapy, they develop drug resistance, resulting in relapse. We investigated whether histone deacetylase 6 (HDAC6) inhibitor A452 overcomes bortezomib resistance in MM. We show that HDAC6-selective inhibitor A452 significantly decreases the activation of BTZ-resistant markers, such as extracellular signal-regulated kinases (ERK) and nuclear factor kappa B (NF-κB), in acquired BTZ-resistant MM cells. Combination treatment of A452 and BTZ or carfilzomib (CFZ) synergistically reduces BTZ-resistant markers. Additionally, A452 synergizes with BTZ or CFZ to inhibit the activation of NF-κB and signal transducer and activator of transcription 3 (STAT3), resulting in decreased expressions of low-molecular-mass polypeptide 2 (LMP2) and LMP7. Furthermore, combining A452 with BTZ or CFZ leads to synergistic cancer cell growth inhibition, viability decreases, and apoptosis induction in the BTZ-resistant MM cells. Overall, the synergistic effect of A452 with CFZ is more potent than that of A452 with BTZ in BTZ-resistant U266 cells. Thus, our findings reveal the HDAC6-selective inhibitor as a promising therapy for BTZ-chemoresistant MM.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms22031341