Inhibition of DEPDC1A, a Bad Prognostic Marker in Multiple Myeloma, Delays Growth and Induces Mature Plasma Cell Markers in Malignant Plasma Cells
Overview
Authors
Affiliations
High throughput DNA microarray has made it possible to outline genes whose expression in malignant plasma cells is associated with short overall survival of patients with Multiple Myeloma (MM). A further step is to elucidate the mechanisms encoded by these genes yielding to drug resistance and/or patients' short survival. We focus here on the biological role of the DEP (for Disheveled, EGL-10, Pleckstrin) domain contained protein 1A (DEPDC1A), a poorly known protein encoded by DEPDC1A gene, whose high expression in malignant plasma cells is associated with short survival of patients. Using conditional lentiviral vector delivery of DEPDC1A shRNA, we report that DEPDC1A knockdown delayed the growth of human myeloma cell lines (HMCLs), with a block in G2 phase of the cell cycle, p53 phosphorylation and stabilization, and p21(Cip1) accumulation. DEPDC1A knockdown also resulted in increased expression of mature plasma cell markers, including CXCR4, IL6-R and CD38. Thus DEPDC1A could contribute to the plasmablast features of MMCs found in some patients with adverse prognosis, blocking the differentiation of malignant plasma cells and promoting cell cycle.
Roles of DEPDC1 in various types of cancer (Review).
Liu D, Li H, Ouyang J Oncol Lett. 2024; 28(5):518.
PMID: 39296974 PMC: 11409430. DOI: 10.3892/ol.2024.14651.
Silencing eL31 suppresses the progression of colorectal cancer via targeting DEPDC1.
Sharen G, Li X, Sun J, Zhang L, Xi W, Zhao X J Transl Med. 2022; 20(1):493.
PMID: 36309731 PMC: 9617412. DOI: 10.1186/s12967-022-03663-6.
Geng G, Li Q, Guo X, Ni Q, Xu Y, Ma Z Mol Med Rep. 2022; 26(2).
PMID: 35795985 PMC: 9309542. DOI: 10.3892/mmr.2022.12788.
Zheng L, Li L, Xie J, Jin H, Zhu N J Cancer. 2021; 12(3):899-911.
PMID: 33403046 PMC: 7778544. DOI: 10.7150/jca.50443.
Zhao H, Yu M, Sui L, Gong B, Zhou B, Chen J Front Oncol. 2019; 9:262.
PMID: 31032225 PMC: 6473048. DOI: 10.3389/fonc.2019.00262.