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Pang Q, Wang Y, Bi D, Lu H. LRRC75A-AS1 targets miR-199b-5p/PDCD4 axis to repress multiple myeloma. Cancer Biol Ther 2020; 21:1051-1059. [PMID: 33131397 DOI: 10.1080/15384047.2020.1831373] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Multiple functions of miR-199b-5p in diseases have been demonstrated by existing studies. However, never has the correlation between miR-199b-5p and multiple myeloma (MM) been established. METHODS qRT-PCR analyzed RNA expression and western blot measured protein expression. Cell proliferation ability was tested via colony formation and EdU assays, and apoptosis was determined via TUNEL, flow cytometry and detection of apoptosis-related proteins. Position of LRRC75A antisense RNA 1 (LRRC75A-AS1) was recognized by FISH assay. RIP, RNA pull-down and luciferase reporter experiments explored the molecular interplay. RESULTS GEO (Gene Expression Omnibus) data revealed miR-199b-5p upregulation in MM specimens, and qRT-PCR data verified miR-199b-5p upregulation in MM cells. Inhibiting miR-199b-5p markedly impeded MM cell proliferation and stimulated apoptosis. Moreover, we demonstrated the mechanism that miR-199b-5p was decoyed by LRRC75A-AS1 and miR-199b-5p targeted programmed cell death 4 (PDCD4) to repress its expression. Further, LRRC75A-AS1 was verified to repress proliferation and prompt apoptosis in a PDCD4-dependent way in MM cells. CONCLUSION Our data displayed that miR-199b-5p was sequestered by LRRC75A-AS1 so that PDCD4 was released to repress MM, implying the targeting miR-199b-5p as a novel thought for improving MM therapy.
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Affiliation(s)
- Quantang Pang
- Department of Orthopaedics, Rongcheng People's Hospital of Shandong Province , Rongcheng, Shandong, China
| | - Yanyan Wang
- Department of Neurology, Rongcheng People's Hospital of Shandong Province , Rongcheng, Shandong, China
| | - Dapeng Bi
- Department of Orthopaedics, Jining Second People's Hospital of Shandong Province , Jining, Shandong, China
| | - Hongyu Lu
- Department of Neurology, Rongcheng People's Hospital of Shandong Province , Rongcheng, Shandong, China
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Yang X, Huang H, Wang X, Liu H, Liu H, Lin Z. Knockdown of lncRNA SNHG16 suppresses multiple myeloma cell proliferation by sponging miR-342-3p. Cancer Cell Int 2020; 20:38. [PMID: 32025219 PMCID: PMC6998159 DOI: 10.1186/s12935-020-1118-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Accepted: 01/20/2020] [Indexed: 12/12/2022] Open
Abstract
Background Aberrant expression of long non-coding RNAs (lncRNAs) is closely associated with development and prognosis of human cancers. LncRNA SNHG16 is reportedly involved in human cancer; however, its roles in multiple myeloma (MM) remain unclear. Methods In this study, we investigated the function and molecular mechanisms of SNHG16 in MM. MM cells were transfected with si-SNHG16 or si-NC. SNHG16 expression levels was measured by qRT-PCR. Cell proliferation was monitored using the MTS. Flow cytometry assay was performed to measure the cell cycle and apoptosis. Luciferase reporter assay were performed to confirm the sponged miRNAs of SNHG16. Results SNHG16 expression was up-regulated in MM tissues. SNHG16 knockdown suppressed cell proliferation, arrested cell cycle transition from G1 to S phase, and promoted the apoptosis of MM cells. Moreover, SNHG16 knockdown promoted cleaved-Caspase-3, cleaved-Caspase-9, Foxa3a, and Bax expression, while markedly inhibiting CCND1, Bcl-2, Cyclin D1, PI3K, and p-AKT expression in MM cells. miR-342-3p was a direct target of SNHG16. SNHG16 knockdown significantly increased miR-342-3p expression in MM cells. Overexpression miR-342-3p markedly suppressed cell proliferation, arrested cell cycle transition from G1 to S phase, and promoted apoptosis of MM cells. Overexpression of miR-342-3p markedly promoted cleaved-Caspase-3/-9, Foxa3a, and Bax expression, and inhibited CCND1, Bcl-2, Cyclin D1, PI3K, and p-AKT expression in MM cells. Additionally, repression of miR-342-3p could rescue the effect of SNHG16 knockdown on MM cell proliferation, cycle arrest, apoptosis, and related protein expression. Conclusion Knockdown of lncRNA SNHG16 suppresses MM cell proliferation by sponging miR-342-3p, implicating SNHG16 as a novel therapeutic target for MM.
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Affiliation(s)
- Xi Yang
- 1Department of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, 215006 Jiangsu People's Republic of China.,2Department of Hematology, Affiliated Hospital of NanTong University, No.20 Xishi Road, Nantong, 226001 Jiangsu People's Republic of China
| | - Hongming Huang
- 2Department of Hematology, Affiliated Hospital of NanTong University, No.20 Xishi Road, Nantong, 226001 Jiangsu People's Republic of China
| | - Xinfeng Wang
- 2Department of Hematology, Affiliated Hospital of NanTong University, No.20 Xishi Road, Nantong, 226001 Jiangsu People's Republic of China
| | - Haiyan Liu
- 2Department of Hematology, Affiliated Hospital of NanTong University, No.20 Xishi Road, Nantong, 226001 Jiangsu People's Republic of China
| | - Hong Liu
- 2Department of Hematology, Affiliated Hospital of NanTong University, No.20 Xishi Road, Nantong, 226001 Jiangsu People's Republic of China
| | - Zenghua Lin
- 2Department of Hematology, Affiliated Hospital of NanTong University, No.20 Xishi Road, Nantong, 226001 Jiangsu People's Republic of China
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Chen R, Zhang X, Wang C. LncRNA HOXB-AS1 promotes cell growth in multiple myeloma via FUT4 mRNA stability by ELAVL1. J Cell Biochem 2019; 121:4043-4051. [PMID: 31886581 DOI: 10.1002/jcb.29573] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 12/09/2019] [Indexed: 12/11/2022]
Abstract
Multiple myeloma (MM) is defined as the second most common hematological tumor in the globe. Long noncoding RNAs (lncRNAs) have been reported to play stimulative or suppressive role in the progression of different carcinomas. The investigation of lncRNAs in MM is still inadequate. LncRNA HOXB cluster antisense RNA 1 (HOXB-AS1) was once revealed to facilitate glioma progression by affecting cellular activities of glioma cells. However, whether HOXB-AS1 participates in the development of MM still remains an enigma. In this study, we unveiled that HOXB-AS1 was highly expressed in MM and loss-of-function assays certified that HOXB-AS1 obstruction suppressed MM cell proliferation, and stimulated cell apoptosis. In addition, HOXB-AS1 could modulate fucosyltransferase 4 (FUT4) and FUT4-mediated Wnt/β-catenin pathway. In subsequence, it was observed from mechanism assays that HOXB-AS1 enhanced the interaction between ELAVL1 and FUT4 so as to stabilize FUT4 messenger RNA. In the end, rescue experiments affirmed that HOXB-AS1 affected the cell growth through FUT4 in MM. In conclusion, the whole modulation mechanism of HOXB-AS1/ELAVL1/FUT4 axis in MM was validated in this study, which suggested that HOXB-AS1 might function as a powerful and promising therapeutic biomarker for the clinical treatment of patients with MM.
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Affiliation(s)
- Rongsheng Chen
- Department of Spinal Surgery, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Xiaobo Zhang
- Department of Spinal Surgery, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
| | - Changsheng Wang
- Department of Spinal Surgery, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
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Guan R, Wang W, Fu B, Pang Y, Lou Y, Li H. Increased lncRNA HOTAIR expression promotes the chemoresistance of multiple myeloma to dexamethasone by regulating cell viability and apoptosis by mediating the JAK2/STAT3 signaling pathway. Mol Med Rep 2019; 20:3917-3923. [PMID: 31485665 DOI: 10.3892/mmr.2019.10603] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 05/02/2019] [Indexed: 11/06/2022] Open
Abstract
Multiple studies have shown that HOX antisense intergenic RNA (HOTAIR), an oncogenic long non‑coding RNA (lncRNA), is dysregulated in leukemia and is involved in tumor progression. The aim of the present study was to determine whether HOTAIR could serve as a novel biomarker for the diagnosis of multiple myeloma (MM), and to investigate its role in regards to MM cell viability and chemoresistance to dexamethasone (DEX). The results revealed that the expression of HOTAIR was significantly upregulated in serum, bone marrow and primary CD138+ cells from MM patients compared with those from normal controls as determined by qPCR. HOTAIR expression was obviously increased in MM cell lines compared to that in normal plasma cells. ROC curve analysis showed that the serum level of HOTAIR exhibited a higher diagnostic value for MM. Furthermore, loss‑of‑functional assays indicated that HOTAIR inhibition suppressed MM cell viability by arresting the cell cycle at the G0/G1 phase as determined by cell viability assay and flow cytometry. An in‑depth study revealed that knockdown of HOTAIR led to decreased chemoresistance of DEX in MM cells by regulating the JAK2/STAT3 signaling pathway. Taken together, our findings suggest that upregulation of serum HOTAIR may prove to be a novel biomarker for the diagnosis of MM. HOTAIR promoted MM cell viability and increased chemoresistance of MM to DEX via the JAK2/STAT3 signaling pathway, indicating HOTAIR may also serve as a potential therapeutic target for MM.
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Affiliation(s)
- Rongyan Guan
- Department of Hematology, Daqing Oilfield General Hospital, Daqing, Heilongjiang 163001, P.R. China
| | - Wei Wang
- Department of Hematology, Daqing Oilfield General Hospital, Daqing, Heilongjiang 163001, P.R. China
| | - Bin Fu
- Department of Hematology, Heze Municipal Hospital, Heze, Shandong 274000, P.R. China
| | - Yujun Pang
- Department of Central Laboratory, Daqing Oilfield General Hospital, Daqing, Heilongjiang 163001, P.R. China
| | - Ye Lou
- Department of Hematology, Daqing Oilfield General Hospital, Daqing, Heilongjiang 163001, P.R. China
| | - Hong Li
- Department of Hematology, Daqing Oilfield General Hospital, Daqing, Heilongjiang 163001, P.R. China
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Wang JN, Cao XX, Zhao AL, Cai H, Wang X, Li J. Increased activated regulatory T cell subsets and aging Treg-like cells in multiple myeloma and monoclonal gammopathy of undetermined significance: a case control study. Cancer Cell Int 2018; 18:187. [PMID: 30479566 PMCID: PMC6245875 DOI: 10.1186/s12935-018-0687-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 11/12/2018] [Indexed: 12/18/2022] Open
Abstract
Background Accumulating evidence have indicated that regulatory T cells (Tregs) play an essential role in T cell-mediated immune response and development of multiple myeloma (MM). CD4+FoxP3+ T cells are composed of three phenotypically and functionally distinct subpopulations: CD45RA+FoxP3lo resting Tregs (rTregs), CD45RA-FoxP3hi activated Tregs (aTregs) and CD45RA-FoxP3lo non-suppressive T cells (non-Tregs). We aimed to clarify the frequency and function of these three subpopulations in newly diagnosed multiple myeloma and monoclonal gammopathy of undetermined significance (MGUS) patients. In addition, CD28-CD4+FoxP3+ Treg-like cell is a senescent regulatory T cell subset with partial suppressive function, which could be impaired during myelomagenesis. Methods we examined 20 patients with MGUS, 26 patients with newly diagnosed MM and 18 healthy volunteers. Flow cytometric analysis in peripheral blood and bone marrow was performed for frequency study. The immunosuppressive function of Treg subsets was assessed by their ability to suppress the proliferation of responder cells in co-culture. Concentration of cytokine from the culture supernatants of proliferation assay was measured using ELISA. Results The proportion of activated Tregs in CD4+ T cells was significantly higher in MGUS and MM patients than healthy controls (P = 0.01, P < 0.001) in both PB and BM; while the proportion of rTregs in MGUS, MM patients was significantly lower than that of controls (P = 0.02, P < 0.01) only in BM. There was no significant difference in frequencies of non-Tregs from MGUS to MM patients with normal controls (P = 0.14, P = 0.88). Significant increase in PB and BM Treg-like cells was observed in MGUS and MM cohort compared with healthy controls (P < 0.01, P < 0.01). Treg-like cells in MM patients were significantly higher than those in MGUS patients (P < 0.01). The inhibition rate of aTreg in bone marrow of MM patients was significantly higher than that of rTreg (P < 0.01), while the inhibition rate of non-Treg was significantly lower than that of rTreg cells (P < 0.01). Functional assays revealed the suppressive and secretory abilities of three Treg subsets were intact in MM patients. Conclusions In summary, aTregs and aging Treg-like cells were quantitatively altered in MGUS and MM patients, which might be associated with disease progression and prognosis.
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Affiliation(s)
- Ji-Nuo Wang
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xin-Xin Cao
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Ai-Lin Zhao
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Hao Cai
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xuan Wang
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Jian Li
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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Yang Q, Shen X, Su Z, Ju S. Emerging roles of noncoding RNAs in multiple myeloma: A review. J Cell Physiol 2018; 234:7957-7969. [PMID: 30370557 DOI: 10.1002/jcp.27547] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 09/13/2018] [Indexed: 01/06/2023]
Abstract
Multiple myeloma (MM) is a hematologic malignancy characterized by unrestricted secretion of monoclonal immunoglobulin and uncontrolled plasma cell proliferation. Extra-medullary infiltration and drug resistance are two major obstacles in the treatment of MM. To solve these problems, it is necessary to elucidate the underlying pathological mechanisms and find new therapeutic targets. Noncoding RNAs (ncRNAs), which were once considered "transcriptional noise," have been recognized as crucial regulators in the process of tumorigenesis including MM. Increasing evidence has shown that ncRNAs participate in MM pathogenesis via a series of complex cellular or extracellular processes. This review article summarizes examples of ncRNAs involved in myelosis and discusses their potential as biomarkers and therapeutic targets in the diagnosis and treatment of myelosis.
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Affiliation(s)
- Qian Yang
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, Nantong, China.,Medical School of Nantong University, Nantong, China
| | - Xianjuan Shen
- Research Center of Clinical Medicine, Affiliated Hospital of Nantong University, Nantong, China
| | - Zhangyao Su
- Medical School of Nantong University, Nantong, China
| | - Shaoqing Ju
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, Nantong, China
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7
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Chen XY, Sun RX, Zhang WY, Liu T, Zheng YH, Wu Y. [Molecular mechanisms and relationship of M2-polarized macrophages with early response in multiple myeloma]. ZHONGHUA XUE YE XUE ZA ZHI = ZHONGHUA XUEYEXUE ZAZHI 2018; 38:480-486. [PMID: 28655090 PMCID: PMC7342963 DOI: 10.3760/cma.j.issn.0253-2727.2017.06.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
目的 探讨替代活化型巨噬细胞(M2 MΦ)和多发性骨髓瘤(MM)早期治疗反应的关系及其在发病机制中的可能作用。 方法 采用免疫组化法标记240例MM患者骨髓标本中的MΦ;建立体外M2 MΦ诱导培养体系,构建Transwell共培养模型与RPMI 8226和U266细胞共培养,CCK-8法检测M2 MΦ对细胞增殖的影响,流式细胞术检测对地塞米松(1 µ mol/L)诱导骨髓瘤细胞凋亡的影响,ELISA法检测对TNF-α和IL-6表达的影响,real time PCR法检测对趋化因子、血管内皮生长因子(VEGF)及其受体表达的影响。 结果 ①依据骨髓组织M2 MΦ浸润程度将患者分为高浸润组(92例)和低浸润组(148例),高浸润组患者早期治疗有效率明显低于低浸润组,差异有统计学意义(23.9%对73.0%,χ2=60.31,P<0.001)。②培养24、36 h,共培养组细胞增殖能力较对照组显著上升:M2 MΦ+RPMI 8226细胞组与对照组比较,P值分别为0.005、0.020;M2 MΦ+U266细胞与对照组比较,P值分别为0.030、0.020。③地塞米松诱导后,共培养组与对照组比较,RPMI 8226细胞凋亡率下降(29.0%对71.0%,t=4.97,P=0.008),U266细胞凋亡率也下降(24.9%对67.7%,t=6.99,P=0.002)。④共培养48 h后,与对照组比较,加入M2 MΦ后可促进RPMI 8226和U266细胞分泌IL-6、TNF-α,促进表达CCL2、CCL3、CCR2、CCR5、VEGFA、VEGFR-1和VEGFR-2。 结论 MM患者骨髓组织M2 MΦ浸润程度和早期治疗反应相关。M2 MΦ通过促进骨髓瘤细胞分泌系列炎症因子、趋化因子和相关受体的表达,从而促进骨髓瘤细胞增殖以及保护骨髓瘤细胞免于凋亡。
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Affiliation(s)
- X Y Chen
- Department of Hematology and Research Laboratory, West China Hospital, Sichuan University, Chengdu 610041, China
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Simvastatin reverses multiple myeloma serum-induced prothrombotic phenotype in endothelial cells via ERK 1/2 signalling pathway. Blood Coagul Fibrinolysis 2018; 29:501-508. [DOI: 10.1097/mbc.0000000000000745] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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9
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Chen L, Hu N, Wang C, Zhao H, Gu Y. Long non-coding RNA CCAT1 promotes multiple myeloma progression by acting as a molecular sponge of miR-181a-5p to modulate HOXA1 expression. Cell Cycle 2018; 17:319-329. [PMID: 29228867 DOI: 10.1080/15384101.2017.1407893] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Multiple myeloma (MM) is the second most common hematological cancer all over the world. Long non-coding RNA (lncRNA) colon cancer associated transcript-1 (CCAT1) has been reported to play important roles in the development and progression of multiple human malignancies. However, little is known about its functional role and molecular mechanism in MM. The aim of this study was to investigate the clinical and biological significance of CCAT1 in MM. Our data showed that the relative expression levels of CCAT1 were significantly upregulated in MM tissues and cell lines compared with healthy donors and normal plasma cells (nPCs). High expression of CCAT1 was correlated shorter overall survival of MM patients. CCAT1 knockdown significantly inhibited cell proliferation, induced cell cycle arrest at G0/G1 phase and promoted cell apoptosis in vitro, and suppressed tumor growth in vivo. MiR-181a-5p was a direct target of CCAT1, and repression of miR-181a-5p could rescue the inhibition of CCAT1 knockdown on MM progression. In addition, CCAT1 positively regulated HOXA1 expression through sponging miR-181a-5p in MM cells.taken together, lncRNA CCAT1 exerted an oncogenic role in MM by acting as a ceRNA of miR-181a-5p. These results suggest that CCAT1 may serve as a novel diagnostic marker and therapeutic target for MM.
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Affiliation(s)
- Li Chen
- a Department of Hematology , Huaihe Hospital of Henan University , Kaifeng 475000 , Henan China
| | - Ning Hu
- a Department of Hematology , Huaihe Hospital of Henan University , Kaifeng 475000 , Henan China
| | - Chao Wang
- a Department of Hematology , Huaihe Hospital of Henan University , Kaifeng 475000 , Henan China
| | - Hongmian Zhao
- a Department of Hematology , Huaihe Hospital of Henan University , Kaifeng 475000 , Henan China
| | - Yueli Gu
- b Department of Hematology , The First People's Hospital of Shangqiu , Shangqiu 476100 , Henan China
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Ryu J, Koh Y, Park H, Kim DY, Kim DC, Byun JM, Lee HJ, Yoon SS. Highly Expressed Integrin-α8 Induces Epithelial to Mesenchymal Transition-Like Features in Multiple Myeloma with Early Relapse. Mol Cells 2016; 39:898-908. [PMID: 28008160 PMCID: PMC5223107 DOI: 10.14348/molcells.2016.0210] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 11/24/2016] [Accepted: 12/05/2016] [Indexed: 12/12/2022] Open
Abstract
Despite recent groundbreaking advances in multiple myeloma (MM) treatment, most MM patients ultimately experience relapse, and the relapse biology is not entirely understood. To define altered gene expression in MM relapse, gene expression profiles were examined and compared among 16 MM patients grouped by 12 months progression-free survival (PFS) after autologous stem cell transplantation. To maximize the difference between prognostic groups, patients at each end of the PFS spectrum (the four with the shortest PFS and four with the longest PFS) were chosen for additional analyses. We discovered that integrin-α8 (ITGA8) is highly expressed in MM patients with early relapse. The integrin family is well known to be involved in MM progression; however, the role of integrin-α8 is largely unknown. We functionally overexpressed integrin-α8 in MM cell lines, and surprisingly, stemness features including HIF1α, VEGF, OCT4, and Nanog, as well as epithelial mesenchymal transition (EMT)-related phenotypes, including N-cadherin, Slug, Snail and CXCR4, were induced. These, consequently, enhanced migration and invasion abilities, which are crucial to MM pathogenesis. Moreover, the gain of integrin-α8 expression mediated drug resistance against melphalan and bortezomib, which are the main therapeutic agents in MM. The cBioPortal genomic database revealed that ITGA8 have significant tendency to co-occur with PDGFRA and PDGFRB and their mRNA expression were up-regulated in ITGA8 overexpressed MM cells. In summary, integrin-α8, which was up-regulated in MM of early relapse, mediates EMT-like phenotype, enhancing migration and invasion; therefore, it could serve as a potential marker of MM relapse and be a new therapeutic target.
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Affiliation(s)
- Jiyeon Ryu
- Cancer Research Institute, Seoul National University College of Medicine, Seoul 03080,
Korea
| | - Youngil Koh
- Department of Internal Medicine, Seoul National University Hospital, Seoul 03080,
Korea
| | - Hyejoo Park
- Cancer Research Institute, Seoul National University College of Medicine, Seoul 03080,
Korea
| | - Dae Yoon Kim
- Cancer Research Institute, Seoul National University College of Medicine, Seoul 03080,
Korea
| | - Dong Chan Kim
- Cancer Research Institute, Seoul National University College of Medicine, Seoul 03080,
Korea
| | - Ja Min Byun
- Department of Internal Medicine, Seoul National University Hospital, Seoul 03080,
Korea
| | - Hyun Jung Lee
- Department of Internal Medicine, Dongguk University Ilsan Hospital, Goyang 10326,
Korea
| | - Sung-Soo Yoon
- Cancer Research Institute, Seoul National University College of Medicine, Seoul 03080,
Korea
- Department of Internal Medicine, Seoul National University Hospital, Seoul 03080,
Korea
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11
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Wang X, Zhang M. Synergistic effects of valproic acid and arsenic trioxide on RPMI8226 cells in vitro and the possible underlying mechanisms. Mol Med Rep 2015; 12:1449-56. [PMID: 25815518 DOI: 10.3892/mmr.2015.3519] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 02/27/2015] [Indexed: 11/06/2022] Open
Abstract
The aim of the present study was to investigate the synergistic effects of valproic acid (VPA) and arsenic trioxide (ATO) on the proliferation of RPMI8226 cells and the possible underlying mechanisms. Cell apoptosis was assessed by flow cytometry. The mRNA expression levels were analyzed by semi-quantitative polymerase chain reaction, and the protein expression levels were analyzed by western blotting. The histone acetylation and methylation states of the gene promoters were detected using a chromatin immunoprecipitation technique. The apoptotic rates of the RPMI8226 cells in the combined drug groups were significantly increased compared with those of the single drug groups (P<0.05). The mRNA and protein expression levels of Bcl-2 and the expression levels of HDAC1 mRNA and H3K9me2 protein decreased significantly in the combined groups compared with the single drug groups. The mRNA and protein expression levels of Bax, Caspase 8, Caspase 9 and LSD1, and the protein expression of acetylated H3 increased significantly in the combination groups compared with the single drug groups. Histone methylation and acetylation of the Bcl-2 and bax gene promoters were increased in the combination groups compared with the single drug groups. VPA and ATO had synergistic effects on the proliferation of RPMI8226 cells, which may have been associated with the decreased expression of Bcl-2 and the increased expression levels of Bcl-2-associated X protein, Caspase 8 and Caspase 9. Therefore, the expression levels of the Bcl-2 gene family may have been regulated by the levels of gene promoter methylation and acetylation.
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Affiliation(s)
- Xiaoning Wang
- Department of Hematology, The First Affiliated Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Mei Zhang
- Department of Hematology, The First Affiliated Hospital, School of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
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