1
|
Ward GA, Zhang Z, Jueliger S, Potapov IS, Davis MP, Boxall AR, Taylor J, Keer H, Biondo A, Lyons JF, Sims M, Smyth T. Epigenetic Priming by Hypomethylation Enhances the Immunogenic Potential of Tolinapant in T-cell Lymphoma. CANCER RESEARCH COMMUNICATIONS 2024; 4:1441-1453. [PMID: 38727208 PMCID: PMC11155518 DOI: 10.1158/2767-9764.crc-23-0415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 03/02/2024] [Accepted: 05/08/2024] [Indexed: 06/07/2024]
Abstract
Programmed cell death mechanisms are important for the regulation of tumor development and progression. Evasion of and resistance to apoptosis are significant factors in tumorigenesis and drug resistance. Bypassing apoptotic pathways and eliciting another form of regulated cell death, namely necroptosis, an immunogenic cell death (ICD), may override apoptotic resistance. Here, we present the mechanistic rationale for combining tolinapant, an antagonist of the inhibitor of apoptosis proteins (IAP), with decitabine, a hypomethylating agent (HMA), in T-cell lymphoma (TCL). Tolinapant treatment alone of TCL cells in vitro and in syngeneic in vivo models demonstrated that ICD markers can be upregulated, and we have shown that epigenetic priming with decitabine further enhances this effect. The clinical relevance of ICD markers was confirmed by the direct measurement of plasma proteins from patients with peripheral TCL treated with tolinapant. We showed increased levels of necroptosis in TCL lines, along with the expression of cancer-specific antigens (such as cancer testis antigens) and increases in genes involved in IFN signaling induced by HMA treatment, together deliver a strong adaptive immune response to the tumor. These results highlight the potential of a decitabine and tolinapant combination for TCL and could lead to clinical evaluation. SIGNIFICANCE The IAP antagonist tolinapant can induce necroptosis, a key immune-activating event, in TCL. Combination with DNA hypomethylation enhances tolinapant sensitivity and primes resistant cells by re-expressing necrosome proteins. In addition, this combination leads to increases in genes involved in IFN signaling and neoantigen expression, providing further molecular rationale for this novel therapeutic option.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Jason Taylor
- Astex Pharmaceuticals, Inc., Pleasanton, California
| | - Harold Keer
- Astex Pharmaceuticals, Inc., Pleasanton, California
| | | | | | - Martin Sims
- Astex Pharmaceuticals, Cambridge, United Kingdom
| | - Tomoko Smyth
- Astex Pharmaceuticals, Cambridge, United Kingdom
| |
Collapse
|
2
|
Xiao ZX, Liang R, Olsen N, Zheng SG. Roles of IRF4 in various immune cells in systemic lupus erythematosus. Int Immunopharmacol 2024; 133:112077. [PMID: 38615379 DOI: 10.1016/j.intimp.2024.112077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 04/07/2024] [Accepted: 04/09/2024] [Indexed: 04/16/2024]
Abstract
Interferon regulatory factor 4 (IRF4) is a member of IRF family of transcription factors which mainly regulates the transcription of IFN. IRF4 is restrictively expressed in immune cells such as T and B cells, macrophages, as well as DC. It is essential for the development and function of these cells. Since these cells take part in the homeostasis of the immune system and dysfunction of them contributes to the initiation and progress of systemic lupus erythematosus (SLE), the roles of IRF4 in the SLE development becomes an important topic. Here we systemically discuss the biological characteristics of IRF4 in various immune cells and analyze the pathologic effects of IRF4 alteration in SLE and the potential targeting therapeutics of SLE.
Collapse
Affiliation(s)
- Ze Xiu Xiao
- Department of Immunology, the School of Cell and Gene Therapy, Songjiang Research Institute and Songjiang Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 201600, China; Department of Clinical Immunology, the Third Affiliated Hospital at the Sun Yat-sen University, Guangzhou 510630, China
| | - Rongzhen Liang
- Department of Immunology, the School of Cell and Gene Therapy, Songjiang Research Institute and Songjiang Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 201600, China
| | - Nancy Olsen
- Division of Rheumatology, Department of Medicine, Penn State College of Medicine, Hershey, PA 17033, United States
| | - Song Guo Zheng
- Department of Immunology, the School of Cell and Gene Therapy, Songjiang Research Institute and Songjiang Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 201600, China.
| |
Collapse
|
3
|
Wijaya LS, Gabor A, Pot IE, van de Have L, Saez-Rodriguez J, Stevens JL, Le Dévédec SE, Callegaro G, van de Water B. A network-based transcriptomic landscape of HepG2 cells uncovering causal gene-cytotoxicity interactions underlying drug-induced liver injury. Toxicol Sci 2024; 198:14-30. [PMID: 38015832 PMCID: PMC10901150 DOI: 10.1093/toxsci/kfad121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023] Open
Abstract
Drug-induced liver injury (DILI) remains the main reason for drug development attritions largely due to poor mechanistic understanding. Toxicogenomic to interrogate the mechanism of DILI has been broadly performed. Gene coregulation network-based transcriptome analysis is a bioinformatics approach that potentially contributes to improve mechanistic interpretation of toxicogenomic data. Here we performed an extensive concentration time course response-toxicogenomic study in the HepG2 cell line exposed to 20 DILI compounds, 7 reference compounds for stress response pathways, and 10 agonists for cytokines and growth factor receptors. We performed whole transcriptome targeted RNA sequencing to more than 500 conditions and applied weighted gene coregulated network analysis to the transcriptomics data followed by the identification of gene coregulated networks (modules) that were strongly modulated upon the exposure of DILI compounds. Preservation analysis on the module responses of HepG2 and PHH demonstrated highly preserved adaptive stress response gene coregulated networks. We correlated gene coregulated networks with cell death onset and causal relationships of 67 critical target genes of these modules with the onset of cell death was evaluated using RNA interference screening. We identified GTPBP2, HSPA1B, IRF1, SIRT1, and TSC22D3 as essential modulators of DILI compound-induced cell death. These genes were also induced by DILI compounds in PHH. Altogether, we demonstrate the application of large transcriptome datasets combined with network-based analysis and biological validation to uncover the candidate determinants of DILI.
Collapse
Affiliation(s)
- Lukas S Wijaya
- Leiden Academic Centre for Drug Research (LACDR), Faculty of Science, Leiden University, 2333 Leiden, The Netherlands
| | - Attila Gabor
- Institute for Computational Biomedicine, Faculty of Medicine, Heidelberg University, 69120 Heidelberg, Germany
- Heidelberg University Hospital, Molecular Medicine Partnership Unit, 69120 Heidelberg, Germany
| | - Iris E Pot
- Leiden Academic Centre for Drug Research (LACDR), Faculty of Science, Leiden University, 2333 Leiden, The Netherlands
| | - Luca van de Have
- Leiden Academic Centre for Drug Research (LACDR), Faculty of Science, Leiden University, 2333 Leiden, The Netherlands
| | - Julio Saez-Rodriguez
- Institute for Computational Biomedicine, Faculty of Medicine, Heidelberg University, 69120 Heidelberg, Germany
- Heidelberg University Hospital, Molecular Medicine Partnership Unit, 69120 Heidelberg, Germany
| | - James L Stevens
- Leiden Academic Centre for Drug Research (LACDR), Faculty of Science, Leiden University, 2333 Leiden, The Netherlands
| | - Sylvia E Le Dévédec
- Leiden Academic Centre for Drug Research (LACDR), Faculty of Science, Leiden University, 2333 Leiden, The Netherlands
| | - Giulia Callegaro
- Leiden Academic Centre for Drug Research (LACDR), Faculty of Science, Leiden University, 2333 Leiden, The Netherlands
| | - Bob van de Water
- Leiden Academic Centre for Drug Research (LACDR), Faculty of Science, Leiden University, 2333 Leiden, The Netherlands
| |
Collapse
|
4
|
Tan S, Wang Z, Li N, Guo X, Zhang Y, Ma H, Peng X, Zhao Y, Li C, Gao L, Li T, Liang X, Ma C. Transcription factor Zhx2 is a checkpoint that programs macrophage polarization and antitumor response. Cell Death Differ 2023; 30:2104-2119. [PMID: 37582865 PMCID: PMC10482862 DOI: 10.1038/s41418-023-01202-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 07/22/2023] [Accepted: 08/02/2023] [Indexed: 08/17/2023] Open
Abstract
Macrophages are usually educated to tumor-associated macrophages (TAMs) in cancer with pro-tumor functions by tumor microenvironment (TME) and TAM reprogramming has been proposed as a potential tumor immunotherapy strategy. We recently demonstrated the critical role of Zinc-fingers and homeoboxes 2 (Zhx2) in macrophages' metabolic programming. However, whether Zhx2 is responsible for macrophage polarization and TAMs reprogramming is largely unknown. Here, we show that Zhx2 controls macrophage polarization under the inflammatory stimulus and TME. Myeloid-specific deletion of Zhx2 suppresses LPS-induced proinflammatory polarization but promotes IL-4 and TME-induced anti-inflammatory and pro-tumoral phenotypes in murine liver tumor models. Factors in TME, especially lactate, markedly decrease the expression of Zhx2 in TAMs, leading to the switch of TAMs to pro-tumor phenotype and consequent cancer progression. Notably, reduced ZHX2 expression in TAM correlates with poor survival of HCC patients. Mechanistic studies reveal that Zhx2 associates with NF-κB p65 and binds to the Irf1 promoter, leading to transcriptional activation of Irf1 in macrophages. Zhx2 functions in maintaining macrophage polarization by regulating Irf1 transcription, which may be a potential target for macrophage-based cancer immunotherapy.
Collapse
Affiliation(s)
- Siyu Tan
- Department of General Surgery, Qilu Hospital, Shandong University, Jinan, China
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Qilu Hospital, Cheeloo Medical College of Shandong University, Jinan, Shandong, China
| | - Zehua Wang
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Qilu Hospital, Cheeloo Medical College of Shandong University, Jinan, Shandong, China
- Department of Clinical Laboratory, Qilu Hospital, Shandong University (Qingdao), Qingdao, China
| | - Na Li
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Qilu Hospital, Cheeloo Medical College of Shandong University, Jinan, Shandong, China
| | - Xiaowei Guo
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Qilu Hospital, Cheeloo Medical College of Shandong University, Jinan, Shandong, China
| | - Yankun Zhang
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Qilu Hospital, Cheeloo Medical College of Shandong University, Jinan, Shandong, China
| | - Hongxin Ma
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Qilu Hospital, Cheeloo Medical College of Shandong University, Jinan, Shandong, China
- Department of Clinical Laboratory, Shandong Cancer Hospital and Institute, Shandong First Medical University, and Shandong Academy of Medical Sciences, Jinan, China
| | - Xueqi Peng
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Qilu Hospital, Cheeloo Medical College of Shandong University, Jinan, Shandong, China
| | - Ying Zhao
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Qilu Hospital, Cheeloo Medical College of Shandong University, Jinan, Shandong, China
| | - Chunyang Li
- Key Laboratory for Experimental Teratology of Ministry of Education, Department of Histology and Embryology, School of Basic Medical Sciences, Cheeloo Medical College of Shandong University, Jinan, Shandong, China
| | - Lifen Gao
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Qilu Hospital, Cheeloo Medical College of Shandong University, Jinan, Shandong, China
| | - Tao Li
- Department of General Surgery, Qilu Hospital, Shandong University, Jinan, China
| | - Xiaohong Liang
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Qilu Hospital, Cheeloo Medical College of Shandong University, Jinan, Shandong, China.
| | - Chunhong Ma
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, School of Basic Medical Sciences, Qilu Hospital, Cheeloo Medical College of Shandong University, Jinan, Shandong, China.
| |
Collapse
|
5
|
Zhao Y, Wang X, Nie K. IRF1 promotes the chondrogenesis of human adipose-derived stem cells through regulating HILPDA. Tissue Cell 2023; 82:102046. [PMID: 36933274 DOI: 10.1016/j.tice.2023.102046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 02/13/2023] [Accepted: 02/19/2023] [Indexed: 02/23/2023]
Abstract
BACKGROUND Osteoarthritis is a main cause of deformity in aging people. The chondrogenesis of human adipose-derived stem cells (hADSCs) has a positive effect on the cure of osteoarthritis. However, the regulatory mechanism of hADSC chondrogenesis still needs further exploration. This research investigates the role of interferon regulatory factor 1 (IRF1) in the chondrogenesis of hADSCs. METHODS hADSCs were purchased and cultured. The interaction between IRF1 and hypoxia inducible lipid droplet associated (HILPDA) was predicted by bioinformatics analysis, and verified through dual-luciferase reporter and chromatin immunoprecipitation assays. The expressions of IRF1 and HILPDA in osteoarthritis cartilage samples were measured through qRT-PCR. After hADSCs were transfected or further induced for chondrogenesis, the chondrogenesis was visualized by Alcian blue staining, and the expressions of IRF1, HILPDA and chondrogenesis-related factors (SOX9, Aggrecan, COL2A1, MMP13, MMP3) were determined through qRT-PCR or Western blot. RESULTS HILPDA bound to IRF1 in hADSCs. IRF1 and HILPDA levels were up-regulated during the chondrogenesis of hADSCs. Overexpressions of IRF1 and HILPDA promoted the chondrogenesis of hADSCs with the up-regulation of SOX9, Aggrecan and COL2A1 and the down-regulation of MMP13 and MMP3; however, IRF1 silencing generated the opposite effects. Besides, HILPDA overexpression reversed the effects of IRF1 silencing on inhibiting chondrogenesis of hADSCs and regulating the expressions of chondrogenesis-related factors. CONCLUSION IRF1 promotes the chondrogenesis of hADSCs through up-regulating HILPDA level, providing novel biomarkers for treating osteoarthritis.
Collapse
Affiliation(s)
- Yujun Zhao
- Department of orthopedics, Jincheng People's Hospital, China.
| | - Xiaotie Wang
- Department of orthopedics, Jincheng People's Hospital, China
| | - Keke Nie
- Department of orthopedics, Jincheng People's Hospital, China
| |
Collapse
|
6
|
Hannes S, Karlowitz R, van Wijk SJL. The Smac mimetic BV6 cooperates with STING to induce necroptosis in apoptosis-resistant pancreatic carcinoma cells. Cell Death Dis 2021; 12:816. [PMID: 34462421 PMCID: PMC8405653 DOI: 10.1038/s41419-021-04014-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 07/07/2021] [Accepted: 07/12/2021] [Indexed: 12/24/2022]
Abstract
Pancreatic cancer (PC) still remains a major cause of cancer-related death worldwide and alternative treatments are urgently required. A common problem of PC is the development of resistance against apoptosis that limits therapeutic success. Here we demonstrate that the prototypical Smac mimetic BV6 cooperates with the stimulator of interferon (IFN) genes (STING) ligand 2',3'-cyclic guanosine monophosphate-adenosine monophosphate (2'3'-cGAMP) to trigger necroptosis in apoptosis-deficient PC cells. Pharmacological inhibition of key components of necroptosis signaling, such as receptor-interacting protein 1 (RIPK1), RIPK3, and mixed lineage kinase domain-like protein (MLKL), significantly rescues PC cells from 2'3'-cGAMP/BV6/zVAD.fmk-mediated cell death, suggesting the induction of necroptosis. Consistently, 2'3'-cGAMP/BV6 co-treatment promotes phosphorylation of MLKL. Furthermore, we show that 2'3'-cGAMP stimulates the production of type I IFNs, which cooperate with BV6 to trigger necroptosis in apoptosis-deficient settings. STING silencing via siRNA or CRISPR/Cas9-mediated gene knockout protects PC cells from 2'3'-cGAMP/BV6/zVAD.fmk-mediated cell death. Interestingly, we demonstrate that nuclear factor-κB (NF-κB), tumor necrosis factor-α (TNFα), and IFN-regulatory factor 1 (IRF1) signaling are involved in triggering 2'3'-cGAMP/BV6/zVAD.fmk-induced necroptosis. In conclusion, we show that activated STING and BV6 act together to exert antitumor effects on PC cells with important implications for the design of new PC treatment concepts.
Collapse
Affiliation(s)
- Sabine Hannes
- Institute for Experimental Cancer Research in Pediatrics, Goethe-University, Komturstrasse 3a, 60528, Frankfurt, Germany
- General and Visceral Surgery, Goethe-University, Frankfurt, Germany
| | - Rebekka Karlowitz
- Institute for Experimental Cancer Research in Pediatrics, Goethe-University, Komturstrasse 3a, 60528, Frankfurt, Germany
| | - Sjoerd J L van Wijk
- Institute for Experimental Cancer Research in Pediatrics, Goethe-University, Komturstrasse 3a, 60528, Frankfurt, Germany.
| |
Collapse
|
7
|
Guo Y, Gu R, Gan D, Hu F, Li G, Xu G. Mitochondrial DNA drives noncanonical inflammation activation via cGAS-STING signaling pathway in retinal microvascular endothelial cells. Cell Commun Signal 2020; 18:172. [PMID: 33115500 PMCID: PMC7592595 DOI: 10.1186/s12964-020-00637-3] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 08/05/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Pathological stimuli cause mitochondrial damage and leakage of mitochondrial DNA (mtDNA) into the cytosol, as demonstrated in many cell types. The cytosolic mtDNA then drives the activation of noninfectious inflammation. Retinal microvascular endothelial cells (RMECs) play an important role in the inner endothelial blood-retinal barrier (BRB). RMEC dysfunction frequently occurs in posterior-segment eye diseases, causing loss of vision. In this study, we investigated the involvement of cytosolic mtDNA in noninfectious immune inflammation in RMECs under pathological stimuli. METHODS RMECs were stimulated with 100 ng/ml lipopolysaccharide (LPS), 200 μM hydrogen peroxide (H2O2), or 25 mM D-glucose. After 24 h, immunofluorescent staining was used to detect the opening of the mitochondrial permeability transition pore (MPTP). Cytosolic mtDNA was detected with immunofluorescent staining and PCR after stimulation. mtDNA was then isolated and used to transfect RMECs in vitro, and the protein levels of cGAS were evaluated with western blotting. Real-time PCR was used to examine cGAS mRNA expression levels at different time points after mtDNA stimulation. The activation of STING was detected with immunofluorescent staining 6 h after mtDNA stimulation. Western blotting was used to determine the expression of STING and IFNβ, the phosphorylation status of TBK1, IRF3, and nuclear factor-κB (NF-κB) P65, and the nuclear translocation of IRF3 and NF-κB P65 at 0, 3, 6, 12, and 24 h. The mRNA expression of proinflammatory cytokines CCL4, CXCL10, and IFNB1, and transcription factor IRF1 were determined with real-time PCR, together with the concentrations of intercellular adhesion molecule 1 (ICAM-1) mRNA. RESULTS Pathological stimuli caused mtDNA to leak into the cytosol by opening the MPTP in RMECs after 24 h. Cytosolic mtDNA regulated the expression of cGAS and the distribution of STING in RMECs. It promoted ICAM-1, STING and IFNβ expression, TBK1, IRF3, and NF-κB phosphorylation and the nuclear translocation in RMECs at 12 and 24 h after its transfection. The mRNAs of proinflammatory cytokines CCL4, CXCL10, and IFNB1, and transcription factor IRF1 were significantly elevated at 12 and 24 h after mtDNA stimulation. CONCLUSIONS Pathological stimulation induces mtDNA escape into the cytosol of RMECs. This cytoplasmic mtDNA is recognized by the DNA sensor cGAS, increasing the expression of inflammatory cytokines through the STING-TBK1 signaling pathway. Video Abstract. (MP4 37490 kb).
Collapse
Affiliation(s)
- Yue Guo
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, 200031, China
| | - Ruiping Gu
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, 200031, China
| | - Dekang Gan
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, 200031, China
| | - Fangyuan Hu
- Eye Institute, Eye and ENT Hospital of Fudan University, Shanghai, 200031, China
| | - Gang Li
- Eye Institute, Eye and ENT Hospital of Fudan University, Shanghai, 200031, China
| | - Gezhi Xu
- Department of Ophthalmology, Eye and ENT Hospital of Fudan University, Shanghai, 200031, China. .,Shanghai Key Laboratory of Visual Impairment and Restoration, Shanghai, 200031, China. .,Key Laboratory of Myopia of State Health Ministry, Shanghai, 200031, China.
| |
Collapse
|
8
|
Cheng JP, Huang B, Duan JH, Yi KJ, Zhuang ZL. miR-4295 promotes cell proliferation, migration and invasion of osteosarcoma through targeting interferon regulatory factor 1. Oncol Lett 2020; 20:260. [PMID: 32989394 DOI: 10.3892/ol.2020.12123] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Accepted: 07/23/2020] [Indexed: 11/05/2022] Open
Abstract
Osteosarcoma (OS) is the most common form of primary malignant bone tumor. Despite encouraging progress in the treatment of OS, the survival rate for patients with OS has remained unchanged over the past 40 years. It has been established that miRNA plays a crucial regulatory role in the progression and development of OS. To explore the potential association of miRNAs with OS, bioinformatics techniques were used to screen for differentially expressed miRNA genes in OS in the Gene Expression Omnibus database. In the GSE70367 database, it was revealed that miR-4295 expression was abnormally elevated in the expression of OS cells. To characterize the potential function of miR-4295 in OS, the expression levels of miR-4295 in 30 samples of OS and adjacent normal tissues was examined. The results revealed that the expression of miR-4295 was significantly increased in OS tissues compared with the paired normal tissues. Moreover, the expression levels of miR-4295 in OS cell lines (MG-63 and Saos-2) were significantly higher compared with those in the normal human mesenchymal stem cells. In addition, miR-4295 was associated with OS cell proliferation, migration and invasion. Furthermore, it was demonstrated that the expression of interferon regulatory factor (IRF)1, a tumor suppressor, was regulated by miR-4295 directly in OS cells. Taken together, the present results revealed that miR-4295 may act as a tumor activator by targeting IRF1 during the progression of OS. Investigating miR-4295 may provide novel insight into the mechanisms of OS metastasis, and inhibition and targeting miR-4295 may be a novel therapeutic strategy for the treatment of OS.
Collapse
Affiliation(s)
- Jin Pei Cheng
- Department of Orthopaedics, Xiangyang No. 1 People's Hospital, Hubei University of Medicine, Xiangyang, Hubei 441000, P.R. China
| | - Bin Huang
- Department of Orthopaedics, Xiangyang No. 1 People's Hospital, Hubei University of Medicine, Xiangyang, Hubei 441000, P.R. China
| | - Jun Hu Duan
- Department of Orthopaedics, Xiangyang No. 1 People's Hospital, Hubei University of Medicine, Xiangyang, Hubei 441000, P.R. China
| | - Kai Jun Yi
- Department of Orthopaedics, Xiangyang No. 1 People's Hospital, Hubei University of Medicine, Xiangyang, Hubei 441000, P.R. China
| | - Zheng Ling Zhuang
- Department of Orthopaedics, Xiangyang No. 1 People's Hospital, Hubei University of Medicine, Xiangyang, Hubei 441000, P.R. China
| |
Collapse
|
9
|
Shi Y, Zhang B, Zhu J, Huang W, Han B, Wang Q, Qi C, Wang M, Liu F. miR-106b-5p Inhibits IRF1/IFN-β Signaling to Promote M2 Macrophage Polarization of Glioblastoma. Onco Targets Ther 2020; 13:7479-7492. [PMID: 32801770 PMCID: PMC7398755 DOI: 10.2147/ott.s238975] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Accepted: 07/06/2020] [Indexed: 01/01/2023] Open
Abstract
Purpose The microRNA (miRNA) profile changes in the tumor-associated macrophages. However, the role of miR-106b-5p in the glioblastoma-associated macrophages is poorly understood. Materials and Methods In our study, miR-106b-5p and M2 macrophage markers were detected by qRT-PCR and Western blotting in THP1 cells, with the conditioned medium from U251 cells or M2 macrophages in response to IL-4 stimulation and M1 macrophages stimulated by LPS and IFN-γ. IFN regulatory factor (IRF1) was identified as a target of miR-106b-5p in the glioma infiltrating macrophages by luciferase reporter assay. The molecular mechanisms involved in the miR-106b-5p-mediated regulation of M2 polarization were clarified by shRNA knockdown assay. Results Our results showed miR-106b-5p expression was upregulated in glioma-infiltrating macrophages. miR-106b-5p regulated M2 polarization of glioma infiltrating macrophages and enhanced the growth of glioma-infiltrating macrophages. IRF1 was identified as a target of miR-106b-5p. Furthermore, miR-106b-5p inhibited IRF1 expression by targeting IRF1/IFN-β pathway to promote M2 polarization of macrophages. Conclusion miR-106b-5p may inhibit IRF1/IFN-β signaling to promote M2 macrophage polarization of glioblastoma, and it may become a novel target for the treatment of glioblastoma.
Collapse
Affiliation(s)
- Yu Shi
- Department of Neurology, Xuzhou Hospital Affiliated to Jiangsu University, Xuzhou, Jiangsu, People's Republic of China
| | - Bin Zhang
- Department of Neurosurgery, Jintan People's Hospital, Changzhou, Jiangsu, People's Republic of China
| | - Jian Zhu
- Department of Neurosurgery, Yancheng No.1 People's Hospital, Yancheng, Jiangsu, People's Republic of China
| | - Wu Huang
- Department of Neurosurgery, Nanjing Medical University Affiliated Changzhou NO.2 People's Hospital, Changzhou, Jiangsu, People's Republic of China
| | - Bin Han
- Department of Neurosurgery, Nanjing Medical University Affiliated Changzhou NO.2 People's Hospital, Changzhou, Jiangsu, People's Republic of China
| | - Qilong Wang
- Department of Neurosurgery, Nanjing Medical University Affiliated Changzhou NO.2 People's Hospital, Changzhou, Jiangsu, People's Republic of China
| | - Chunjian Qi
- Department of Central Lab, Nanjing Medical University Affiliated Changzhou NO.2 People's Hospital, Changzhou, Jiangsu, People's Republic of China
| | - Minghai Wang
- Department of Neurosurgery, Nanjing Medical University Affiliated Changzhou NO.2 People's Hospital, Changzhou, Jiangsu, People's Republic of China
| | - Fang Liu
- Department of Neurosurgery, Nanjing Medical University Affiliated Changzhou NO.2 People's Hospital, Changzhou, Jiangsu, People's Republic of China
| |
Collapse
|
10
|
Liu H, Yang X, Tang K, Ye T, Duan C, Lv P, Yan L, Wu X, Chen Z, Liu J, Deng Y, Zeng G, Xing J, Ye Z, Xu H. Sulforaphane elicts dual therapeutic effects on Renal Inflammatory Injury and crystal deposition in Calcium Oxalate Nephrocalcinosis. Am J Cancer Res 2020; 10:7319-7334. [PMID: 32641994 PMCID: PMC7330860 DOI: 10.7150/thno.44054] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 05/06/2020] [Indexed: 02/07/2023] Open
Abstract
Intrarenal calcium oxalate (CaOx) crystals induce renal tubular epithelial cells (TECs) injury and inflammation, which involve Toll-like receptor 4 (TLR4)/interferon regulatory factor 1 (IRF1) signaling. Additionally, infiltrating macrophages (Mϕs) might influence intrarenal CaOx crystals and CaOx-induced renal injury. Although the roles of nuclear factor erythroid 2-related factor 2 (Nrf2) in regulating inflammation and macrophage polarization are well characterized, its potential mechanisms in regulating CaOx nephrocalcinosis remain undefined. Methods: We used a Gene Expression Omnibus dataset to analyze gene-expression profiles. Luciferase reporter, western blot, quantitative polymerase chain reaction, immunofluorescence staining, fluorescence in situ hybridization, positron emission tomography computed tomography imaging, flow cytometry, and chromatin immunoprecipitation assays were employed to study the mechanism of miR-93-TLR4/IRF1 regulation by Nrf2. Anti-inflammatory activity and regulation of macrophage polarization by Nrf2 were investigated in vitro and in vivo. Results: We found that stone-mediated kidney inflammation significantly affected stone growth, and that sulforaphane attenuated CaOx nephrocalcinosis-induced kidney injury and renal CaOx crystals deposition. Additionally, Nrf2 levels significantly increased and negatively correlated with TLR4 and IRF1 levels in a mouse model of CaOx nephrocalcinosis following sulforaphane treatment. Moreover, Nrf2 suppressed TLR4 and IRF1 levels and decreased M1-macrophage polarization which induced by supernatants from COM-stimulated TECs in vitro. In terms of mechanism, transcription factor analyses, microRNA microarray, and chromatin immunoprecipitation assays showed that Nrf2 exhibited positive transcriptional activation of miR-93-5p. In addition, Luciferase reporter, qRT-PCR, and western blot validated that miR-93-5p targets TLR4 and IRF1 mRNA. Furthermore, suppressed miR-93-5p expression partially reversed Nrf2-dependent TLR4/IRF1 downregulation. Conclusions: The results suggested that sulforaphane might promote M2Mϕ polarization and inhibit CaOx nephrocalcinosis-induced inflammatory injury to renal tubular epithelial cells via the Nrf2-miR-93-TLR4/IRF1 pathway in vitro and in vivo.
Collapse
|
11
|
Zhao XY, Wang XY, Wei QY, Xu YM, Lau ATY. Potency and Selectivity of SMAC/DIABLO Mimetics in Solid Tumor Therapy. Cells 2020; 9:cells9041012. [PMID: 32325691 PMCID: PMC7226512 DOI: 10.3390/cells9041012] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 04/10/2020] [Accepted: 04/13/2020] [Indexed: 02/05/2023] Open
Abstract
Aiming to promote cancer cell apoptosis is a mainstream strategy of cancer therapy. The second mitochondria-derived activator of caspase (SMAC)/direct inhibitor of apoptosis protein (IAP)-binding protein with low pI (DIABLO) protein is an essential and endogenous antagonist of inhibitor of apoptosis proteins (IAPs). SMAC mimetics (SMs) are a series of synthetically chemical compounds. Via database analysis and literature searching, we summarize the potential mechanisms of endogenous SMAC inefficiency, degradation, mutation, releasing blockage, and depression. We review the development of SMs, as well as preclinical and clinical outcomes of SMs in solid tumor treatment, and we analyze their strengths, weaknesses, opportunities, and threats from our point of view. We also highlight several questions in need of further investigation.
Collapse
Affiliation(s)
| | | | | | - Yan-Ming Xu
- Correspondence: (Y.-M.X.); (A.T.Y.L.); Tel.: +86-754-8890-0437 (Y.-M.X.); +86-754-8853-0052 (A.T.Y.L.)
| | - Andy T. Y. Lau
- Correspondence: (Y.-M.X.); (A.T.Y.L.); Tel.: +86-754-8890-0437 (Y.-M.X.); +86-754-8853-0052 (A.T.Y.L.)
| |
Collapse
|
12
|
Schmidt N, Kowald L, van Wijk SJL, Fulda S. Differential involvement of TAK1, RIPK1 and NF-κB signaling in Smac mimetic-induced cell death in breast cancer cells. Biol Chem 2019; 400:171-180. [PMID: 30391931 DOI: 10.1515/hsz-2018-0324] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Accepted: 10/29/2018] [Indexed: 11/15/2022]
Abstract
Smac mimetics (SMs) are considered promising cancer therapeutics. However, the mechanisms responsible for mediating cell death by SMs are still only partly understood. Therefore, in this study, we investigated signaling pathways upon treatment with the bivalent SM BV6 using two SM-sensitive breast cancer cell lines as models. Interestingly, genetic silencing of transforming growth factor (TGF)β activated kinase (TAK)1, an upstream activator of the nuclear factor-kappaB (NF-κB) subunit RelA (p65), increased BV6-induced cell death only in EVSA-T cells, although it reduced BV6-mediated upregulation of tumor necrosis factor (TNF)α in both EVSA-T and MDA-MB-231 cells. By comparison, genetic silencing of p65, a key component of canonical NF-κB signaling, blocked BV6-induced cell death in MDA-MB-231 but not in EVSA-T cells. Similarly, knockdown of NF-κB-inducing kinase (NIK) rescued MDA-MB-231 cells from BV6-induced cell death, while it failed to do so in EVSA-T cells. Consistently, silencing of p65 or NIK reduced BV6-stimulated upregulation of TNFα in MDA-MB-231 cells. In conclusion, TAK1, receptor-interacting kinase 1 (RIPK1) as well as canonical and non-canonical NF-κB signaling are differentially involved in SM-induced cell death in breast cancer cells. These findings contribute to a better understanding of SM-induced signaling pathways.
Collapse
Affiliation(s)
- Nadine Schmidt
- Institute for Experimental Cancer Research in Pediatrics, Goethe University, Komturstrasse 3a, D-60528 Frankfurt/Main, Germany
| | - Lisa Kowald
- Institute for Experimental Cancer Research in Pediatrics, Goethe University, Komturstrasse 3a, D-60528 Frankfurt/Main, Germany
| | - Sjoerd J L van Wijk
- Institute for Experimental Cancer Research in Pediatrics, Goethe University, Komturstrasse 3a, D-60528 Frankfurt/Main, Germany
| | - Simone Fulda
- Institute for Experimental Cancer Research in Pediatrics, Goethe University, Komturstrasse 3a, D-60528 Frankfurt/Main, Germany.,German Cancer Consortium (DKTK), Partner Site, Frankfurt, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany
| |
Collapse
|
13
|
Chen Z, Yuan P, Sun X, Tang K, Liu H, Han S, Ye T, Liu X, Yang X, Zeng J, Yan L, Xing J, Xiao K, Ye Z, Xu H. Pioglitazone decreased renal calcium oxalate crystal formation by suppressing M1 macrophage polarization via the PPAR-γ-miR-23 axis. Am J Physiol Renal Physiol 2019; 317:F137-F151. [PMID: 31091119 DOI: 10.1152/ajprenal.00047.2019] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Interaction of pioglitazone (PGZ) and macrophages (Mps) in renal crystal formation remains unclear. In the present study, we investigated the possible mechanisms involved with Mps of PGZ in suppressing renal crystal formation. Crystal formation in the mouse kidney was detected using polarized light optical microscopy and Pizzolato staining. Gene expression was detected by Western blot analysis, quantitative RT-PCR, immunohistochemistry, immunofluorescence, and ELISA. Mp phenotypes were identified by flow cytometric analysis. Cell apoptosis was detected with TUNEL assay, and tubular injury was detected with periodic acid-Schiff staining. Interaction of peroxisome proliferator-activated receptor (PPAR)-γ and promoter was determined by chromatin immunoprecipitation assay. Luciferase reporter assay was performed to authenticate target genes of miRNA-23 (miR-23). Recombinant adenovirus was used to elucidate the role of miR-23 in vivo. Renal crystal formation, inflammation, tubular injury, and cell apoptosis were significantly marked in glyoxylic acid-treated groups and significantly decreased in PGZ-treated groups. PGZ significantly reduced Mp infiltration and M1 Mp polarization in the kidney. In vitro, PGZ shifted crystal-stimulated M1-predominant Mps to M2-predominant Mps, which were anti-inflammatory. PPAR-γ could directly bind to one PPAR-γ regulatory element in the promoter of pre-miR-23 to promote expression of miR-23 in Mps. We identified two downstream target genes of miR-23, interferon regulatory factor 1 and Pknox1. Moreover, miR-23 decreased crystal deposition, M1 Mp polarization, and injury in the kidney. This study has proven that PGZ decreased renal calcium oxalate crystal formation and renal inflammatory injury by suppressing M1 Mp polarization through a PPAR-γ-miR-23-interferon regulatory factor 1/Pknox1 axis. PGZ is liable to be a potential therapeutic medicine for treating urolithiasis.
Collapse
Affiliation(s)
- Zhiqiang Chen
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China.,Institute of Urology of Hubei Province , Wuhan , China
| | - Peng Yuan
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China.,Institute of Urology of Hubei Province , Wuhan , China
| | - Xifeng Sun
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China.,Institute of Urology of Hubei Province , Wuhan , China
| | - Kun Tang
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China.,Institute of Urology of Hubei Province , Wuhan , China
| | - Haoran Liu
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China.,Institute of Urology of Hubei Province , Wuhan , China
| | - Shanfu Han
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China.,Institute of Urology of Hubei Province , Wuhan , China
| | - Tao Ye
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China.,Institute of Urology of Hubei Province , Wuhan , China
| | - Xiao Liu
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China.,Institute of Urology of Hubei Province , Wuhan , China
| | - Xiaoqi Yang
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China.,Institute of Urology of Hubei Province , Wuhan , China
| | - Jin Zeng
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China.,Institute of Urology of Hubei Province , Wuhan , China
| | - Libin Yan
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China.,Institute of Urology of Hubei Province , Wuhan , China
| | - Jinchun Xing
- Department of Urology, First Affiliated Hospital of Xiamen University , Xiamen , China
| | - Kefeng Xiao
- Department of Urology, People's Hospital of Shenzhen City , Shenzhen , China
| | - Zhangqun Ye
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China.,Institute of Urology of Hubei Province , Wuhan , China
| | - Hua Xu
- Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology , Wuhan , China.,Institute of Urology of Hubei Province , Wuhan , China
| |
Collapse
|
14
|
Beug ST, Cheung HH, Sanda T, St-Jean M, Beauregard CE, Mamady H, Baird SD, LaCasse EC, Korneluk RG. The transcription factor SP3 drives TNF-α expression in response to Smac mimetics. Sci Signal 2019; 12:12/566/eaat9563. [PMID: 30696705 DOI: 10.1126/scisignal.aat9563] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The controlled production and downstream signaling of the inflammatory cytokine tumor necrosis factor-α (TNF-α) are important for immunity and its anticancer effects. Although chronic stimulation with TNF-α is detrimental to the health of the host in several autoimmune and inflammatory disorders, TNF-α-contrary to what its name implies-leads to cancer formation by promoting cell proliferation and survival. Smac mimetic compounds (SMCs), small-molecule antagonists of inhibitor of apoptosis proteins (IAPs), switch the TNF-α signal from promoting survival to promoting death in cancer cells. Using a genome-wide siRNA screen to identify factors required for SMC-to-TNF-α-mediated cancer cell death, we identified the transcription factor SP3 as a critical molecule in both basal and SMC-induced production of TNF-α by engaging the nuclear factor κB (NF-κB) transcriptional pathway. Moreover, the promotion of TNF-α expression by SP3 activity confers differential sensitivity of cancer versus normal cells to SMC treatment. The key role of SP3 in TNF-α production and signaling will help us further understand TNF-α biology and provide insight into mechanisms relevant to cancer and inflammatory disease.
Collapse
Affiliation(s)
- Shawn T Beug
- Apoptosis Research Centre, Children's Hospital of Eastern Ontario Research Institute, 401 Smyth Road, Ottawa, Ontario K1H 8L1, Canada.,Department of Biochemistry, Microbiology and Immunology, University of Ottawa, 451 Smyth Road, Ottawa, Ontario K1H 8M5, Canada
| | - Herman H Cheung
- Apoptosis Research Centre, Children's Hospital of Eastern Ontario Research Institute, 401 Smyth Road, Ottawa, Ontario K1H 8L1, Canada
| | - Tarun Sanda
- Apoptosis Research Centre, Children's Hospital of Eastern Ontario Research Institute, 401 Smyth Road, Ottawa, Ontario K1H 8L1, Canada.,Department of Biochemistry, Microbiology and Immunology, University of Ottawa, 451 Smyth Road, Ottawa, Ontario K1H 8M5, Canada
| | - Martine St-Jean
- Apoptosis Research Centre, Children's Hospital of Eastern Ontario Research Institute, 401 Smyth Road, Ottawa, Ontario K1H 8L1, Canada
| | - Caroline E Beauregard
- Apoptosis Research Centre, Children's Hospital of Eastern Ontario Research Institute, 401 Smyth Road, Ottawa, Ontario K1H 8L1, Canada.,Department of Biochemistry, Microbiology and Immunology, University of Ottawa, 451 Smyth Road, Ottawa, Ontario K1H 8M5, Canada
| | - Hapsatou Mamady
- Apoptosis Research Centre, Children's Hospital of Eastern Ontario Research Institute, 401 Smyth Road, Ottawa, Ontario K1H 8L1, Canada
| | - Stephen D Baird
- Apoptosis Research Centre, Children's Hospital of Eastern Ontario Research Institute, 401 Smyth Road, Ottawa, Ontario K1H 8L1, Canada
| | - Eric C LaCasse
- Apoptosis Research Centre, Children's Hospital of Eastern Ontario Research Institute, 401 Smyth Road, Ottawa, Ontario K1H 8L1, Canada.
| | - Robert G Korneluk
- Apoptosis Research Centre, Children's Hospital of Eastern Ontario Research Institute, 401 Smyth Road, Ottawa, Ontario K1H 8L1, Canada. .,Department of Biochemistry, Microbiology and Immunology, University of Ottawa, 451 Smyth Road, Ottawa, Ontario K1H 8M5, Canada
| |
Collapse
|
15
|
Interferon regulatory factor 1 inactivation in human cancer. Biosci Rep 2018; 38:BSR20171672. [PMID: 29599126 PMCID: PMC5938431 DOI: 10.1042/bsr20171672] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 03/18/2018] [Accepted: 03/28/2018] [Indexed: 11/28/2022] Open
Abstract
Interferon regulatory factors (IRFs) are a group of closely related proteins collectively referred to as the IRF family. Members of this family were originally recognized for their roles in inflammatory responses; however, recent research has suggested that they are also involved in tumor biology. This review focusses on current knowledge of the roles of IRF-1 and IRF-2 in human cancer, with particular attention paid to the impact of IRF-1 inactivation. The different mechanisms underlying IRF-1 inactivation and their implications for human cancers and the potential importance of IRF-1 in immunotherapy are also summarized.
Collapse
|
16
|
Schmidt N, Haydn T, Schneider I, Busch H, Boerries M, Fulda S. Smac mimetic induces an early wave of gene expression via NF-κB and AP-1 and a second wave via TNFR1 signaling. Cancer Lett 2018; 421:170-185. [DOI: 10.1016/j.canlet.2018.01.082] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 01/30/2018] [Accepted: 01/31/2018] [Indexed: 01/07/2023]
|
17
|
Lueck SC, Russ AC, Botzenhardt U, Schlenk RF, Zobel K, Deshayes K, Vucic D, Döhner H, Döhner K, Fulda S, Bullinger L. Smac mimetic induces cell death in a large proportion of primary acute myeloid leukemia samples, which correlates with defined molecular markers. Oncotarget 2018; 7:49539-49551. [PMID: 27385100 PMCID: PMC5226527 DOI: 10.18632/oncotarget.10390] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 06/13/2016] [Indexed: 01/01/2023] Open
Abstract
Apoptosis is deregulated in most, if not all, cancers, including hematological malignancies. Smac mimetics that antagonize Inhibitor of Apoptosis (IAP) proteins have so far largely been investigated in acute myeloid leukemia (AML) cell lines; however, little is yet known on the therapeutic potential of Smac mimetics in primary AML samples. In this study, we therefore investigated the antileukemic activity of the Smac mimetic BV6 in diagnostic samples of 67 adult AML patients and correlated the response to clinical, cytogenetic and molecular markers and gene expression profiles. Treatment with cytarabine (ara-C) was used as a standard chemotherapeutic agent. Interestingly, about half (51%) of primary AML samples are sensitive to BV6 and 21% intermediate responsive, while 28% are resistant. Notably, 69% of ara-C-resistant samples show a good to fair response to BV6. Furthermore, combination treatment with ara-C and BV6 exerts additive effects in most samples. Whole-genome gene expression profiling identifies cell death, TNFR1 and NF-κB signaling among the top pathways that are activated by BV6 in BV6-sensitive, but not in BV6-resistant cases. Furthermore, sensitivity of primary AML blasts to BV6 correlates with significantly elevated expression levels of TNF and lower levels of XIAP in diagnostic samples, as well as with NPM1 mutation. In a large set of primary AML samples, these data provide novel insights into factors regulating Smac mimetic response in AML and have important implications for the development of Smac mimetic-based therapies and related diagnostics in AML.
Collapse
Affiliation(s)
- Sonja C Lueck
- Department of Internal Medicine III, University Hospital Ulm, Ulm, Germany
| | - Annika C Russ
- Department of Internal Medicine III, University Hospital Ulm, Ulm, Germany
| | - Ursula Botzenhardt
- Department of Internal Medicine III, University Hospital Ulm, Ulm, Germany
| | - Richard F Schlenk
- Department of Internal Medicine III, University Hospital Ulm, Ulm, Germany
| | - Kerry Zobel
- Early Discovery Biochemistry, Genentech, Inc., South San Francisco, CA, USA
| | - Kurt Deshayes
- Early Discovery Biochemistry, Genentech, Inc., South San Francisco, CA, USA
| | - Domagoj Vucic
- Early Discovery Biochemistry, Genentech, Inc., South San Francisco, CA, USA
| | - Hartmut Döhner
- Department of Internal Medicine III, University Hospital Ulm, Ulm, Germany
| | - Konstanze Döhner
- Department of Internal Medicine III, University Hospital Ulm, Ulm, Germany
| | - Simone Fulda
- Institute for Experimental Cancer Research in Pediatrics, Goethe-University, Frankfurt, Germany.,German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Lars Bullinger
- Department of Internal Medicine III, University Hospital Ulm, Ulm, Germany
| |
Collapse
|
18
|
Zhang HM, Li SP, Yu Y, Wang Z, He JD, Xu YJ, Zhang RX, Zhang JJ, Zhu ZJ, Shen ZY. Bi-directional roles of IRF-1 on autophagy diminish its prognostic value as compared with Ki67 in liver transplantation for hepatocellular carcinoma. Oncotarget 2018; 7:37979-37992. [PMID: 27191889 PMCID: PMC5122365 DOI: 10.18632/oncotarget.9365] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Accepted: 04/27/2016] [Indexed: 12/14/2022] Open
Abstract
The prognostic values of IRF-1 and Ki-67 for liver transplantation (LT) of hepatocellular carcinoma (HCC) were investigated, as well as the mechanisms of IRF-1 in tumor suppression. Adult orthotropic liver transplantation cases (N = 127) were involved in the analysis. A significant decreased recurrence free survival (RFS) was found in the Ki-67 positive groups. Ki-67, tumor microemboli, the Milan and UCSF criteria were found to be independent risk factors for RFS. In LT for HCC beyond the Milan criteria, a significant decrease in RFS was found in the IRF-1 negative groups. In SK-Hep1 cells, an increase in apoptosis and decrease in autophagy were observed after IFN-γ stimulation, which was accompanied with increasing IRF-1 levels. When IRF-1 siRNA or a caspase inhibitor were used, reductions in LC3-II were diminished or disappeared after IFN-γ stimulation, suggesting that IFN-γ inhibited autophagy via IRF-1 expression and caspase activation. However, after IRF-1 siRNA was introduced, a reduction in LC3-II was found. Thus basic expression of IRF-1 was also necessary for autophagy. IRF-1 may be used as a potential target for HCC treatment based on its capacity to affect apoptosis and autophagy. Ki-67 shows great promise for the prediction of HCC recurrence in LT and can be used as an aid in the selection of LT candidates.
Collapse
Affiliation(s)
- Hai-Ming Zhang
- First Central Clinical College, Tianjin Medical University, Tianjin, P. R. China.,Department of Transplantation, Tianjin First Central Hospital, Tianjin, P. R. China.,Tianjin Key Laboratory of Organ Transplantation, Tianjin, P. R. China
| | - Shi-Peng Li
- First Central Clinical College, Tianjin Medical University, Tianjin, P. R. China.,Tianjin Key Laboratory of Organ Transplantation, Tianjin, P. R. China.,Laboratory of Immunology and Inflammation, Tianjin Medical University, Tianjin, P. R. China
| | - Yao Yu
- First Central Clinical College, Tianjin Medical University, Tianjin, P. R. China.,Tianjin Key Laboratory of Organ Transplantation, Tianjin, P. R. China.,Laboratory of Immunology and Inflammation, Tianjin Medical University, Tianjin, P. R. China
| | - Zhen Wang
- First Central Clinical College, Tianjin Medical University, Tianjin, P. R. China.,Tianjin Key Laboratory of Organ Transplantation, Tianjin, P. R. China
| | - Jin-Dan He
- First Central Clinical College, Tianjin Medical University, Tianjin, P. R. China.,Tianjin Key Laboratory of Organ Transplantation, Tianjin, P. R. China
| | - Yan-Jie Xu
- First Central Clinical College, Tianjin Medical University, Tianjin, P. R. China.,Laboratory of Immunology and Inflammation, Tianjin Medical University, Tianjin, P. R. China
| | - Rong-Xin Zhang
- Laboratory of Immunology and Inflammation, Tianjin Medical University, Tianjin, P. R. China
| | - Jian-Jun Zhang
- First Central Clinical College, Tianjin Medical University, Tianjin, P. R. China.,Department of Transplantation, Tianjin First Central Hospital, Tianjin, P. R. China
| | - Zhi-Jun Zhu
- Beijing Friendship Hospital, China Capital Medical University, Beijing, P. R. China
| | - Zhong-Yang Shen
- First Central Clinical College, Tianjin Medical University, Tianjin, P. R. China.,Department of Transplantation, Tianjin First Central Hospital, Tianjin, P. R. China.,Tianjin Key Laboratory of Organ Transplantation, Tianjin, P. R. China
| |
Collapse
|
19
|
Fulda S. Therapeutic opportunities based on caspase modulation. Semin Cell Dev Biol 2017; 82:150-157. [PMID: 29247787 DOI: 10.1016/j.semcdb.2017.12.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 12/05/2017] [Accepted: 12/11/2017] [Indexed: 02/07/2023]
Abstract
Caspases are a family of proteolytic enzymes that play a critical role in the regulation of programmed cell death via apoptosis. Activation of caspases is frequently impaired in human cancers, contributing to cancer formation, progression and therapy resistance. A better understanding of the molecular mechanisms regulating caspase activation in cancer cells is therefore highly important. Thus, targeted modulation of caspase activation and apoptosis represents a promising approach for the development of new therapeutic options to elucidate cancer cell death.
Collapse
Affiliation(s)
- Simone Fulda
- Institute for Experimental Cancer Research in Pediatrics, Goethe-University Frankfurt, Komturstrasse 3a, 60528, Frankfurt, Germany; German Cancer Consortium (DKTK), Partner Site Frankfurt, Germany; German Cancer Research Center (DKFZ), Heidelberg, Germany.
| |
Collapse
|
20
|
Cekay MJ, Roesler S, Frank T, Knuth AK, Eckhardt I, Fulda S. Smac mimetics and type II interferon synergistically induce necroptosis in various cancer cell lines. Cancer Lett 2017; 410:228-237. [DOI: 10.1016/j.canlet.2017.09.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 08/29/2017] [Accepted: 09/10/2017] [Indexed: 12/11/2022]
|
21
|
Finlay D, Teriete P, Vamos M, Cosford NDP, Vuori K. Inducing death in tumor cells: roles of the inhibitor of apoptosis proteins. F1000Res 2017; 6:587. [PMID: 28529715 PMCID: PMC5414821 DOI: 10.12688/f1000research.10625.1] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/24/2017] [Indexed: 12/17/2022] Open
Abstract
The heterogeneous group of diseases collectively termed cancer results not just from aberrant cellular proliferation but also from a lack of accompanying homeostatic cell death. Indeed, cancer cells regularly acquire resistance to programmed cell death, or apoptosis, which not only supports cancer progression but also leads to resistance to therapeutic agents. Thus, various approaches have been undertaken in order to induce apoptosis in tumor cells for therapeutic purposes. Here, we will focus our discussion on agents that directly affect the apoptotic machinery itself rather than on drugs that induce apoptosis in tumor cells indirectly, such as by DNA damage or kinase dependency inhibition. As the roles of the Bcl-2 family have been extensively studied and reviewed recently, we will focus in this review specifically on the inhibitor of apoptosis protein (IAP) family. IAPs are a disparate group of proteins that all contain a baculovirus IAP repeat domain, which is important for the inhibition of apoptosis in some, but not all, family members. We describe each of the family members with respect to their structural and functional similarities and differences and their respective roles in cancer. Finally, we also review the current state of IAPs as targets for anti-cancer therapeutics and discuss the current clinical state of IAP antagonists.
Collapse
Affiliation(s)
- Darren Finlay
- NCI-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Peter Teriete
- NCI-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Mitchell Vamos
- NCI-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Nicholas D P Cosford
- NCI-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Kristiina Vuori
- NCI-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA, 92037, USA
| |
Collapse
|
22
|
Fulda S. Smac Mimetics to Therapeutically Target IAP Proteins in Cancer. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2017; 330:157-169. [PMID: 28215531 DOI: 10.1016/bs.ircmb.2016.09.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
Inhibitor of Apoptosis (IAP) proteins are overexpressed in a variety of human cancers. Therefore, they are considered as promising targets for the design of therapeutic strategies. Smac mimetics mimic the endogenous mitochondrial protein Smac that antagonizes IAP proteins upon its release into the cytosol. Multiple preclinical studies have documented the ability of Smac mimetics to either directly induce cell death of cancer cells or to prime them to agents that trigger cell death. At present, several Smac mimetics are being evaluated in early clinical trials. The current review provides an overview on the potential of Smac mimetics as cancer therapeutics to target IAP proteins for cancer therapy.
Collapse
Affiliation(s)
- S Fulda
- Institute for Experimental Cancer Research in Pediatrics, Goethe-University, Frankfurt, Germany; German Cancer Consortium (DKTK), Heidelberg, Germany; German Cancer Research Center (DKFZ), Heidelberg, Germany.
| |
Collapse
|
23
|
Coexpression Network Analysis of Benign and Malignant Phenotypes of SIV-Infected Sooty Mangabey and Rhesus Macaque. PLoS One 2016; 11:e0156170. [PMID: 27280726 PMCID: PMC4900581 DOI: 10.1371/journal.pone.0156170] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 05/10/2016] [Indexed: 02/02/2023] Open
Abstract
To explore the differences between the extreme SIV infection phenotypes, nonprogression (BEN: benign) to AIDS in sooty mangabeys (SMs) and progression to AIDS (MAL: malignant) in rhesus macaques (RMs), we performed an integrated dual positive-negative connectivity (DPNC) analysis of gene coexpression networks (GCN) based on publicly available big data sets in the GEO database of NCBI. The microarray-based gene expression data sets were generated, respectively, from the peripheral blood of SMs and RMs at several time points of SIV infection. Significant differences of GCN changes in DPNC values were observed in SIV-infected SMs and RMs. There are three groups of enriched genes or pathways (EGPs) that are associated with three SIV infection phenotypes (BEN+, MAL+ and mixed BEN+/MAL+). The MAL+ phenotype in SIV-infected RMs is specifically associated with eight EGPs, including the protein ubiquitin proteasome system, p53, granzyme A, gramzyme B, polo-like kinase, Glucocorticoid receptor, oxidative phosyphorylation and mitochondrial signaling. Mitochondrial (endosymbiotic) dysfunction is solely present in RMs. Specific BEN+ pattern changes in four EGPs are identified in SIV-infected SMs, including the pathways contributing to interferon signaling, BRCA1/DNA damage response, PKR/INF induction and LGALS8. There are three enriched pathways (PRR-activated IRF signaling, RIG1-like receptor and PRR pathway) contributing to the mixed (BEN+/MAL+) phenotypes of SIV infections in RMs and SMs, suggesting that these pathways play a dual role in the host defense against viral infections. Further analysis of Hub genes in these GCNs revealed that the genes LGALS8 and IL-17RA, which positively regulate the barrier function of the gut mucosa and the immune homeostasis with the gut microbiota (exosymbiosis), were significantly differentially expressed in RMs and SMs. Our data suggest that there exists an exo- (dysbiosis of the gut microbiota) and endo- (mitochondrial dysfunction) symbiotic imbalance (EESI) in HIV/SIV infections. Dissecting the mechanisms of the exo-endo symbiotic balance (EESB) that maintains immune homeostasis and the EESI problems in HIV/SIV infections may lead to a better understanding of the pathogenesis of AIDS and the development of novel interventions for the rational control of this disease.
Collapse
|
24
|
Lindemann C, Marschall V, Weigert A, Klingebiel T, Fulda S. Smac Mimetic-Induced Upregulation of CCL2/MCP-1 Triggers Migration and Invasion of Glioblastoma Cells and Influences the Tumor Microenvironment in a Paracrine Manner. Neoplasia 2016; 17:481-9. [PMID: 26152356 PMCID: PMC4719005 DOI: 10.1016/j.neo.2015.05.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 05/10/2015] [Accepted: 05/19/2015] [Indexed: 12/25/2022] Open
Abstract
Second mitochondria-derived activator of caspase (Smac) mimetics are considered as promising anticancer therapeutics that are currently under investigation in early clinical trials. They induce apoptosis by antagonizing inhibitor of apoptosis proteins, which are frequently overexpressed in cancer. We previously reported that Smac mimetics, such as BV6, additionally exert non-apoptotic functions in glioblastoma (GBM) cells by stimulating migration and invasion in a nuclear factor kappa B (NF-κB)-dependent manner. Because NF-κB target genes mediating these effects are largely unknown, we performed whole-genome expression analyses. Here, we identify chemokine (C-C motif) ligand 2 (CCL2) as the top-listed NF-κB-regulated gene being upregulated upon BV6 treatment in GBM cells. BV6-induced upregulation and secretion of CCL2 are required for migration and invasion of GBM cells because knockdown of CCL2 in GBM cells abolishes these effects. Co-culture experiments of GBM cells with non-malignant astroglial cells reveal that BV6-stimulated secretion of CCL2 by GBM cells into the supernatant triggers migration of astroglial cells toward GBM cells because CCL2 knockdown in BV6-treated GBM cells impedes BV6-stimulated migration of astroglial cells. In conclusion, we identify CCL2 as a BV6-induced NF-κB target gene that triggers migration and invasion of GBM cells and exerts paracrine effects on the GBM's microenvironment by stimulating migration of astroglial cells. These findings provide novel insights into the biological functions of Smac mimetics with important implications for the development of Smac mimetics as cancer therapeutics.
Collapse
Affiliation(s)
- Carina Lindemann
- Experimental Cancer Research in Pediatrics, Goethe-University Frankfurt, Germany
| | - Viola Marschall
- Experimental Cancer Research in Pediatrics, Goethe-University Frankfurt, Germany
| | - Andreas Weigert
- Institute of Biochemistry I, Goethe-University, Frankfurt, Germany
| | - Thomas Klingebiel
- Pediatric Hematology and Oncology, University Children's Hospital, Goethe-University, Frankfurt, Germany
| | - Simone Fulda
- Experimental Cancer Research in Pediatrics, Goethe-University Frankfurt, Germany; German Cancer Consortium (DKTK) Heidelberg, Germany; German Cancer Research Center (DKFZ) Heidelberg, Germany.
| |
Collapse
|
25
|
PKC activation sensitizes basal-like breast cancer cell lines to Smac mimetics. Cell Death Discov 2016; 2:16002. [PMID: 27551497 PMCID: PMC4979953 DOI: 10.1038/cddiscovery.2016.2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 12/16/2015] [Indexed: 01/01/2023] Open
Abstract
There is a need for novel strategies to initiate cancer cell death. One approach is the use of Smac mimetics, which antagonize inhibitor of apoptosis proteins (IAPs). Recent studies have shown that combinations of Smac mimetics such as LBW242 or LCL161 in combination with chemotherapeutic agents increase cancer cell death. Here we show that the protein kinase C (PKC) activator TPA together with the Smac mimetic LBW242 induces cell death in two basal breast cancer cell lines (MDA-MB-468 and BT-549) that are resistant to Smac mimetic as single agent. Ten other LBW242-insensitive cancer cell lines were not influenced by the TPA+LBW242 combination. The TPA+LBW242 effect was suppressed by the PKC inhibitor GF109203X, indicating dependence on PKC enzymatic activity. The PKC effect was mediated via increased synthesis and release of TNFα, which can induce death in the presence of Smac mimetics. The cell death, coinciding with caspase-3 cleavage, was suppressed by caspase inhibition and preceded by the association of RIP1 with caspase-8, as seen in complex II formation. Smac mimetics, but not TPA, induced the non-canonical NF-κB pathway in both MDA-MB-231 and MDA-MB-468 cells. Blocking the canonical NF-κB pathway suppressed TPA induction of TNFα in MDA-MB-468 cells whereas isolated downregulation of either the canonical or non-canonical pathways did not abolish the Smac mimetic induction of the NF-κB driven genes TNFα and BIRC3 in MDA-MB-231 cells although the absolute levels were suppressed. A combined downregulation of the canonical and non-canonical pathways further suppressed TNFα levels and inhibited Smac mimetic-mediated cell death. Our data suggest that in certain basal breast cancer cell lines co-treatment of TPA with a Smac mimetic induces cell death highlighting the potential of using these pathways as molecular targets for basal-like breast cancers.
Collapse
|
26
|
Smac mimetic-induced upregulation of interferon-β sensitizes glioblastoma to temozolomide-induced cell death. Cell Death Dis 2015; 6:e1888. [PMID: 26379193 PMCID: PMC4650438 DOI: 10.1038/cddis.2015.235] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 07/09/2015] [Accepted: 07/20/2015] [Indexed: 12/13/2022]
Abstract
Inhibitor of apoptosis (IAP) proteins are frequently expressed at high levels in cancer cells and represent attractive therapeutic targets. We previously reported that the Smac (second mitochondria-derived activator of caspases) mimetic BV6, which antagonizes IAP proteins, sensitizes glioblastoma cells to temozolomide (TMZ)-induced cell death in a nuclear factor-κB (NF-κB)-dependent manner. However, BV6-induced NF-κB target genes responsible for this synergistic interaction have remained elusive. Using whole-genome gene expression profiling, we here identify BV6-stimulated, NF-κB-dependent transcriptional upregulation of interferon-β (IFNβ) and IFN-mediated proapoptotic signaling as critical events that mediate BV6/TMZ-induced apoptosis. Knockdown of IFNβ significantly rescues cells from BV6/TMZ-induced cell death. Similarly, silencing of the corresponding receptor IFNα/β receptor (IFNAR) confers a significant protection against apoptosis, demonstrating that IFNβ and IFN signaling are required for BV6/TMZ-mediated cell death. Moreover, BV6 and TMZ cooperate to transcriptionally upregulate the proapoptotic B-cell lymphoma 2 family proteins Bax (Bcl-2-associated X protein) or Puma (p53-upregulated modulator of apoptosis). Knockdown of Bax or Puma significantly decreases BV6/TMZ-induced apoptosis, showing that both proteins are necessary for apoptosis. By identifying IFNβ as a key mediator of BV6/TMZ-induced apoptosis, our study provides novel insights into the underlying molecular mechanisms of Smac mimetic-mediated chemosensitization with important implications for the development of novel treatment strategies for glioblastoma.
Collapse
|
27
|
Opel D, Schnaiter A, Dodier D, Jovanovic M, Gerhardinger A, Idler I, Mertens D, Bullinger L, Stilgenbauer S, Fulda S. Targeting inhibitor of apoptosis proteins by Smac mimetic elicits cell death in poor prognostic subgroups of chronic lymphocytic leukemia. Int J Cancer 2015; 137:2959-70. [PMID: 26096065 DOI: 10.1002/ijc.29650] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 05/20/2015] [Accepted: 05/29/2015] [Indexed: 12/21/2022]
Abstract
Inhibitor of apoptosis (IAP) proteins are highly expressed in chronic lymphocytic leukemia (CLL) cells and contribute to evasion of cell death and poor therapeutic response. Here, we report that Smac mimetic BV6 dose-dependently induces cell death in 28 of 51 (54%) investigated CLL samples, while B-cells from healthy donors are largely unaffected. Importantly, BV6 is significantly more effective in prognostic unfavorable cases with, e.g., non-mutated VH status and TP53 mutation than samples with unknown or favorable prognosis. The majority of cases with 17p deletion (10/12) and Fludarabine refractory cases respond to BV6, indicating that BV6 acts independently of p53. BV6 also triggers cell death under survival conditions mimicking the microenvironment, e.g., by adding CD40 ligand or conditioned medium. Gene expression profiling identifies cell death, NF-κB and redox signaling among the top pathways regulated by BV6 not only in CLL but also in core-binding factor (CBF) acute myeloid leukemia (AML). Consistently, BV6 stimulates production of reactive oxygen species (ROS), which are contributing to BV6-induced cell death, since antioxidants reduce cell death. While BV6 causes degradation of cellular inhibitor of apoptosis (cIAP)1 and cIAP2 and nuclear factor-kappaB (NF-κB) pathway activation in primary CLL samples, BV6 induces cell death independently of caspase activity, receptor-interacting protein (RIP)1 activity or tumor necrosis factor (TNF)α, as zVAD.fmk, necrostatin-1 or TNFα-blocking antibody Enbrel fail to inhibit cell death. Together, these novel insights into BV6-regulated cell death in CLL have important implications for developing new therapeutic strategies to overcome cell death resistance especially in poor prognostic CLL subgroups.
Collapse
Affiliation(s)
- Daniela Opel
- Department of Internal Medicine III, University Hospital Ulm, Ulm, Germany
| | - Andrea Schnaiter
- Department of Internal Medicine III, University Hospital Ulm, Ulm, Germany
| | - Dagmar Dodier
- Department of Internal Medicine III, University Hospital Ulm, Ulm, Germany
| | - Marjana Jovanovic
- Department of Internal Medicine III, University Hospital Ulm, Ulm, Germany
| | | | - Irina Idler
- Department of Internal Medicine III, University Hospital Ulm, Ulm, Germany
| | - Daniel Mertens
- Department of Internal Medicine III, University Hospital Ulm, Ulm, Germany
| | - Lars Bullinger
- Department of Internal Medicine III, University Hospital Ulm, Ulm, Germany
| | | | - Simone Fulda
- Institute for Experimental Cancer Research in Pediatrics, , Goethe University, Frankfurt, Germany.,German Cancer Consortium (DKTK), Heidelberg, Germany.,German Cancer Research Center (DKFZ), Heidelberg, Germany
| |
Collapse
|
28
|
Abstract
As the Inhibitor of Apoptosis (IAP) proteins are expressed at high levels in human cancers, they represent promising targets for therapeutic intervention. Small-molecule inhibitors of IAP proteins mimicking the endogenous IAP antagonist Smac, called Smac mimetics, neutralize IAP proteins and thereby promote the induction of cell death. Smac mimetics have been shown in preclinical models of human cancer to directly trigger cancer cell death or to sensitize for cancer cell death induced by a variety of cytotoxic stimuli. Smac mimetics are currently undergoing clinical evaluation in phase I/II trials, demonstrating that therapeutic targeting of IAP proteins has reached the clinical stage.
Collapse
Affiliation(s)
- Simone Fulda
- Institute for Experimental Cancer Research in Pediatrics, Goethe-University, Komturstr. 3a, 60528 Frankfurt, Germany; German Cancer Consortium (DKTK), Heidelberg, Germany; German Cancer Research Center (DKFZ), Heidelberg, Germany.
| |
Collapse
|