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Lukiw WJ. NF-kB (p50/p65)-Mediated Pro-Inflammatory microRNA (miRNA) Signaling in Alzheimer's Disease (AD). Front Mol Neurosci 2022; 15:943492. [PMID: 35836546 PMCID: PMC9274251 DOI: 10.3389/fnmol.2022.943492] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 05/27/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
- Walter J. Lukiw
- LSU Neuroscience Center, Louisiana State University Health Science Center, New Orleans, LA, United States
- Department of Ophthalmology, Louisiana State University Health Science Center, New Orleans, LA, United States
- Department Neurology, Louisiana State University Health Science Center, New Orleans, LA, United States
- *Correspondence: Walter J. Lukiw
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2
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iASPP is essential for HIF-1α stabilization to promote angiogenesis and glycolysis via attenuating VHL-mediated protein degradation. Oncogene 2022; 41:1944-1958. [PMID: 35169254 DOI: 10.1038/s41388-022-02234-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 01/24/2022] [Accepted: 02/04/2022] [Indexed: 12/15/2022]
Abstract
Hypoxia-inducible factor-1α (HIF-1α) plays central roles in the hypoxia response. It is highly expressed in multiple cancers, but not always correlated with hypoxia. Mutation of the von Hippel-Lindau (VHL) gene, which encodes an E3 ligase, contributes to the constructive activation of HIF-1α in specific tumor types, as exemplified by renal cell carcinoma; but how VHL wild-type tumors acquire this ability is not completely understood. Here, we found that the oncogene iASPP (inhibitor of apoptosis-simulating protein of p53) plays essential roles in such a context. Genetic inhibition of iASPP reduced tumor growth, accompanied by impaired angiogenesis, increased areas of tumor necrosis, and reduced glycolysis that was HIF-1α-dependent. These abilities of iASPP were validated by in vitro assays. Mechanistically, iASPP directly binds VHL at its β domain, a region also involved in HIF-1α binding, therefore blocking VHL's binding and the subsequent degradation of HIF-1α protein under normoxia. iASPP levels correlate with HIF-1α protein and vascular endothelial growth factor (VEGF) and the glucose transporter protein type 1(GLUT1), representative HIF-1α target genes, in human colon cancer tissues. Furthermore, inhibition of iASPP expression synergizes with low toxic dose of the HIF-1α inhibitor YC-1 to inhibit HIF-1α expression and tumor growth. Our findings suggest that iASPP contributes to HIF-1α activation in cancers, and that iASPP-mediated HIF-1α stabilization has potential as a therapeutic approach against cancer.
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3
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iASPP suppresses Gp78-mediated TMCO1 degradation to maintain Ca 2+ homeostasis and control tumor growth and drug resistance. Proc Natl Acad Sci U S A 2022; 119:2111380119. [PMID: 35121659 PMCID: PMC8832991 DOI: 10.1073/pnas.2111380119] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/21/2021] [Indexed: 12/13/2022] Open
Abstract
Accumulating preclinical and clinical evidence has supported a central role for alterations in Ca2+ homeostasis in the development of cancer. TMCO1 protein is an identified Ca2+-channel protein, while its roles in cancer remain obscure. Here, we found that TMCO1 is increased in colon cancer tissues. In addition, it is a substrate of E3 ligase Gp78. Enhanced oncogene iASPP stabilizes TMCO1 by competitively binding with Gp78. Inhibition of iASPP-TMCO1 sensitizes cancer cells’ response to Ca2+-induced apoptosis. This study has improved our fundamental understanding of the Ca2+ homeostasis in cancer cells. iASPP-TMCO1 axis may present a promising therapeutic target that can combine the conventional drugs to reinforce Ca2+-dependent apoptosis. Ca2+ release from the endoplasmic reticulum (ER) is an essential event in the modulation of Ca2+ homeostasis, which is coordinated by multiple biological processes, ranging from cell proliferation to apoptosis. Deregulated Ca2+ homeostasis is linked with various cancer hallmarks; thus, uncovering the mechanisms underlying Ca2+ homeostasis dynamics may lead to new anticancer treatment strategies. Here, we demonstrate that a reported Ca2+-channel protein TMCO1 (transmembrane and coiled-coil domains 1) is overexpressed in colon cancer tissues at protein levels but not at messenger RNA levels in colon cancer. Further study revealed that TMCO1 is a substrate of ER-associated degradation E3 ligase Gp78. Intriguingly, Gp78-mediated TMCO1 degradation at K186 is under the control of the iASPP (inhibitor of apoptosis-stimulating protein of p53) oncogene. Mechanistically, iASPP robustly reduces ER Ca2+ stores, mainly by competitively binding with Gp78 and interfering with Gp78-mediated TMCO1 degradation. A positive correlation between iASPP and TMCO1 proteins is further validated in human colon tissues. Inhibition of iASPP-TMCO1 axis promotes cytosolic Ca2+ overload–induced apoptotic cell death, reducing tumor growth both in vitro and in vivo. Thus, iASPP-TMCO1 represents a promising anticancer treatment target by modulating Ca2+ homeostasis.
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Shen Y, Lin Y, Liu K, Chen J, Zhong J, Gao Y, Yuan C. XIST: A Meaningful Long Noncoding RNA in NSCLC Process. Curr Pharm Des 2021; 27:1407-1417. [PMID: 33267757 DOI: 10.2174/1381612826999201202102413] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 11/01/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND A number of studies have proposed that lncRNA XIST plays a role in the development and chemosensitivity of NSCLC. Besides, XIST may become a potential therapeutic target for NSCLC patients. The aim of this review is to reveal the biological functions and exact mechanisms of XIST in NSCLC. METHODS In this review, relevant researches involving the relationship between XIST and NSCLC are collected through systematic retrieval of PubMed. RESULTS XIST is an oncogene in NSCLC and is abnormally upregulated in NSCLC tissues. Considerable evidence has shown that XIST plays a critical role in the proliferation, invasion, migration, apoptosis and chemosensitivity of NSCLC cells. XIST mainly functions as a ceRNA in the NSCLC process, while XIST also functions at transcriptional levels. CONCLUSION LncRNA XIST has the potential to become a novel biomolecular marker of NSCLC and a therapeutic target for NSCLC.
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Affiliation(s)
- Yujie Shen
- College of Medical Science, China Three Gorges University, Yichang 443002, China
| | - Yexiang Lin
- College of Medical Science, China Three Gorges University, Yichang 443002, China
| | - Kai Liu
- College of Medical Science, China Three Gorges University, Yichang 443002, China
| | - Jinlan Chen
- College of Medical Science, China Three Gorges University, Yichang 443002, China
| | - Juanjuan Zhong
- College of Medical Science, China Three Gorges University, Yichang 443002, China
| | - Yisong Gao
- College of Medical Science, China Three Gorges University, Yichang 443002, China
| | - Chengfu Yuan
- College of Medical Science, China Three Gorges University, Yichang 443002, China
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Banerjee I, Fisher PB, Sarkar D. Astrocyte elevated gene-1 (AEG-1): A key driver of hepatocellular carcinoma (HCC). Adv Cancer Res 2021; 152:329-381. [PMID: 34353442 DOI: 10.1016/bs.acr.2021.05.003] [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: 11/19/2022]
Abstract
An array of human cancers, including hepatocellular carcinoma (HCC), overexpress the oncogene Astrocyte elevated gene-1 (AEG-1). It is now firmly established that AEG-1 is a key driver of carcinogenesis, and enhanced expression of AEG-1 is a marker of poor prognosis in cancer patients. In-depth studies have revealed that AEG-1 positively regulates different hallmarks of HCC progression including growth and proliferation, angiogenesis, invasion, migration, metastasis and resistance to therapeutic intervention. By interacting with a plethora of proteins as well as mRNAs, AEG-1 regulates gene expression at transcriptional, post-transcriptional, and translational levels, and modulates numerous pro-tumorigenic and tumor-suppressive signal transduction pathways. Even though extensive research over the last two decades using various in vitro and in vivo models has established the pivotal role of AEG-1 in HCC, effective targeting of AEG-1 as a therapeutic intervention for HCC is yet to be achieved in the clinic. Targeted delivery of AEG-1 small interfering ribonucleic acid (siRNA) has demonstrated desired therapeutic effects in mouse models of HCC. Peptidomimetic inhibitors based on protein-protein interaction studies has also been developed recently. Continuous unraveling of novel mechanisms in the regulation of HCC by AEG-1 will generate valuable knowledge facilitating development of specific AEG-1 inhibitory strategies. The present review describes the current status of AEG-1 in HCC gleaned from patient-focused and bench-top studies as well as transgenic and knockout mouse models. We also address the challenges that need to be overcome and discuss future perspectives on this exciting molecule to transform it from bench to bedside.
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Affiliation(s)
- Indranil Banerjee
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, VA, United States
| | - Paul B Fisher
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, VA, United States; VCU Institute of Molecular Medicine, Virginia Commonwealth University, School of Medicine, Richmond, VA, United States; VCU Massey Cancer Center, Virginia Commonwealth University, School of Medicine, Richmond, VA, United States
| | - Devanand Sarkar
- Department of Human and Molecular Genetics, Virginia Commonwealth University, School of Medicine, Richmond, VA, United States; VCU Institute of Molecular Medicine, Virginia Commonwealth University, School of Medicine, Richmond, VA, United States; VCU Massey Cancer Center, Virginia Commonwealth University, School of Medicine, Richmond, VA, United States.
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6
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Yagudin T, Zhao Y, Gao H, Zhang Y, Yang Y, Zhang X, Ma W, Daba TM, Ishmetov V, Kang K, Yang B, Pan Z. iASPP protects the heart from ischemia injury by inhibiting p53 expression and cardiomyocyte apoptosis. Acta Biochim Biophys Sin (Shanghai) 2021; 53:102-111. [PMID: 33128543 DOI: 10.1093/abbs/gmaa104] [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: 03/09/2020] [Indexed: 11/12/2022] Open
Abstract
Currently, there remains a great need to elucidate the molecular mechanism of acute myocardial infarction in order to facilitate the development of novel therapy. Inhibitor of apoptosis-stimulating protein of p53 (iASPP) is a member of the ASPP family proteins and an evolutionarily preserved inhibitor of p53 that is involved in many cellular processes, including apoptosis of cancer cells. The purpose of this study was to investigate the possible role of iASPP in acute myocardial infarction. The protein level of iASPP was markedly reduced in the ischemic hearts in vivo and hydrogen peroxide-exposed cardiomyocytes in vitro. Overexpression of iASPP reduced the infarct size and cardiomyocyte apoptosis of mice subjected to 24 h of coronary artery ligation. Echocardiography showed that cardiac function was improved as indicated by the increase in ejection fraction and fractional shortening. In contrast, knockdown of iASPP exacerbated cardiac injury as manifested by impaired cardiac function, increased infarct size, and apoptosis rate. Mechanistically, overexpression of iASPP inhibited, while knockdown of iASPP increased the expressions of p53 and Bax, the key regulators of apoptosis. Taken together, our results suggested that iASPP is an important regulator of cardiomyocyte apoptosis, which represents a potential target in the therapy of myocardial infarction.
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Affiliation(s)
- Timur Yagudin
- Department of Pharmacology (The Key Laboratory of Cardiovascular Research, Ministry of Education) at College of Pharmacy, Harbin Medical University, Harbin 150086, China
- Department of Hospital Surgery, Bashkir State Medical University, Ufa 450008, Russian Federation
| | - Yue Zhao
- Department of Pharmacology (The Key Laboratory of Cardiovascular Research, Ministry of Education) at College of Pharmacy, Harbin Medical University, Harbin 150086, China
| | - Haiyu Gao
- Department of Pharmacology (The Key Laboratory of Cardiovascular Research, Ministry of Education) at College of Pharmacy, Harbin Medical University, Harbin 150086, China
| | - Yang Zhang
- Department of Pharmacology (The Key Laboratory of Cardiovascular Research, Ministry of Education) at College of Pharmacy, Harbin Medical University, Harbin 150086, China
| | - Ying Yang
- Department of Pharmacology (The Key Laboratory of Cardiovascular Research, Ministry of Education) at College of Pharmacy, Harbin Medical University, Harbin 150086, China
| | - Xiaofang Zhang
- Department of Pharmacology (The Key Laboratory of Cardiovascular Research, Ministry of Education) at College of Pharmacy, Harbin Medical University, Harbin 150086, China
| | - Wenbo Ma
- Department of Pharmacology (The Key Laboratory of Cardiovascular Research, Ministry of Education) at College of Pharmacy, Harbin Medical University, Harbin 150086, China
| | - Tolessa Muleta Daba
- Department of Pharmacology (The Key Laboratory of Cardiovascular Research, Ministry of Education) at College of Pharmacy, Harbin Medical University, Harbin 150086, China
| | - Vladimir Ishmetov
- Department of Pharmacology (The Key Laboratory of Cardiovascular Research, Ministry of Education) at College of Pharmacy, Harbin Medical University, Harbin 150086, China
- Department of Cardiovascular Surgery in Clinic, Hospital of Bashkir State Medical University, Ufa 450059, Russian Federation
| | - Kai Kang
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Baofeng Yang
- Department of Pharmacology (The Key Laboratory of Cardiovascular Research, Ministry of Education) at College of Pharmacy, Harbin Medical University, Harbin 150086, China
| | - Zhenwei Pan
- Department of Pharmacology (The Key Laboratory of Cardiovascular Research, Ministry of Education) at College of Pharmacy, Harbin Medical University, Harbin 150086, China
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Hai B, Pan X, Du C, Mao T, Jia F, Liu Y, Ma Y, Liu X, Zhu B. LncRNA XIST Promotes Growth of Human Chordoma Cells by Regulating miR-124-3p/iASPP Pathway. Onco Targets Ther 2020; 13:4755-4765. [PMID: 32547104 PMCID: PMC7266409 DOI: 10.2147/ott.s252195] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Introduction Chordoma is a malignant primary bone tumor that is found in the spine and skull. X-inactive specific transcript (XIST) is a long non-coding RNA (lncRNA) is known to be involved in the development of various cancers, but its precise function and mechanism in human chordoma have not been elucidated. Here, we investigated the role of lncRNA XIST in chordoma progression. Methods Quantitative real time-polymerase chain reaction (qRT-PCR) was performed to determine lncRNA XIST expression in human chordoma tissues and matched-noncancerous tissues. Western blot was used to determine protein expression. Silencing and overexpression of lncRNA XIST were carried out by RNA interference (RNAi) and lentiviral transduction, respectively. Cell Counting Kit-8 (CCK-8) assay and flow cytometry were employed to examine the effects of lncRNA XIST on growth of human chordoma cells. Lastly, the role of lncRNA XIST in vivo was explored using a xenograft model. Results We found that lncRNA XIST expression was upregulated in chordoma and strongly correlated with poor patient prognosis. Moreover, lncRNA XIST promoted proliferation and inhibited apoptosis of chordoma cells. Mechanistically, upregulation of lncRNA XIST led to a decrease in miR-124-3p expression, thereby promoting the expression of the miR-124-3p target gene, inhibitor of apoptosis-stimulating protein of p53 (iASPP). Addition of miR-124-3p inhibitor or mimic reversed the effects induced by lncRNA XIST silencing or overexpression on chordoma cell proliferation. Lastly, using a xenograft mouse model, we found that silencing of lncRNA XIST decreased tumorigenicity in vivo, as shown by increased tumor cell apoptosis. Conclusion Our findings demonstrate a key role for lncRNA XIST in chordoma progression by regulating miR124-3p/iAPSS pathway.
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Affiliation(s)
- Bao Hai
- Department of Orthopedics, Peking University Third Hospital, Beijing, People's Republic of China
| | - Xiaoyu Pan
- Department of Orthopedics, Peking University Third Hospital, Beijing, People's Republic of China
| | - Chuanchao Du
- Department of Orthopedics, Peking University Third Hospital, Beijing, People's Republic of China
| | - Tianli Mao
- Department of Orthopedics, Peking University Third Hospital, Beijing, People's Republic of China
| | - Fei Jia
- Department of Orthopedics, Peking University Third Hospital, Beijing, People's Republic of China
| | - Yu Liu
- Department of Orthopedics, Peking University Third Hospital, Beijing, People's Republic of China
| | - Yunlong Ma
- The Center for Pain Medicine, Peking University Third Hospital, Beijing, People's Republic of China
| | - Xiaoguang Liu
- Department of Orthopedics, Peking University Third Hospital, Beijing, People's Republic of China.,The Center for Pain Medicine, Peking University Third Hospital, Beijing, People's Republic of China
| | - Bin Zhu
- The Center for Pain Medicine, Peking University Third Hospital, Beijing, People's Republic of China
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8
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Wahba AS, Ibrahim ME, Mesbah NM, Saleh SM, Abo-Elmatty DM, Mehanna ET. Serum LINC00305 expression and its genetic variant rs2850711 are associated with clinical and laboratory features of rheumatoid arthritis. Br J Biomed Sci 2020; 77:142-147. [PMID: 32188348 DOI: 10.1080/09674845.2020.1744942] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Long intergenic non-protein coding (lnc) RNA 00305 (LINC00305) is a pro-inflammatory atherosclerosis-associated lncRNA. We hypothesised that LINC00305 expression and its variant rs2850711 (A/T) are implicated in rheumatoid arthritis (RA) and linked with clinical and routine laboratory markers. METHODS 100 RA patients and 100 healthy controls were recruited. LINC00305 genotyping and expression were performed using allelic-discrimination PCR and quantitative real-time PCR. LINC00305 diagnostic power was evaluated using area under the receiver operating characteristic curve (AUC). Serum nuclear factor- κB (NF-κB) and matrix metalloproteinase-3 (MMP-3) levels were determined by ELISA, standard laboratory markers by routine methods. RESULTS LINC00305 expression was significantly increased in RA patients and positively correlated with DAS28, C-reactive protein, erythrocyte sedimentation rate, rheumatoid factor and anti-cyclic citrullinated peptide antibody. In multivariate analysis, NF-κB, MMP-3 and LINC00305 were significant predictors of RA (P< 0.0001). Individuals carrying AT and TT genotypes of rs2850711 polymorphism had significantly more likely to have RA than AA genotype carriers (P< 0.05). LINC00305 expression, DAS28 score and serum levels of NF-κB and MMP-3 were significantly increased in the patients carrying LINC00305 AT and TT genotypes as compared with AA genotype patients (P< 0.01). CONCLUSION Increased expression level of LINC00305 and its rs2850711 genetic variant may play a role in the diagnosis and management of RA, and its severity and activity.
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Affiliation(s)
- A S Wahba
- Department of Biochemistry, Faculty of Pharmacy, Suez Canal University , Ismailia, Egypt
| | - M E Ibrahim
- Department of Physical Medicine, Rheumatology and Rehabilitation, Faculty of Medicine, Suez Canal University , Ismailia, Egypt
| | - N M Mesbah
- Department of Biochemistry, Faculty of Pharmacy, Suez Canal University , Ismailia, Egypt
| | - S M Saleh
- Department of Biochemistry, Faculty of Pharmacy, Suez Canal University , Ismailia, Egypt
| | - D M Abo-Elmatty
- Department of Biochemistry, Faculty of Pharmacy, Suez Canal University , Ismailia, Egypt
| | - E T Mehanna
- Department of Biochemistry, Faculty of Pharmacy, Suez Canal University , Ismailia, Egypt
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9
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Li H, Zhang W, Zhao K, Zhao D, Zheng S, Hu Y. A previously identified apoptosis inhibitor iASPP confers resistance to chemotherapeutic drugs by suppressing senescence in cancer cells. J Biol Chem 2020; 295:4049-4063. [PMID: 32005663 DOI: 10.1074/jbc.ra119.011411] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 01/09/2020] [Indexed: 01/03/2023] Open
Abstract
Cellular senescence is terminal cell cycle arrest that represents a prominent response to numerous anticancer therapies. The oncogene inhibitor of the apoptosis-stimulating protein of p53 (iASPP) plays essential roles in regulating cellular drug response by inhibiting apoptosis. However, whether or not it regulates chemotherapy-induced senescence (TIS) in cancer cells remains unclear. Here, using two commonly used cancer cell lines, HCT 116 and MCF-7, along with the xenograft mouse model, we found that iASPP inhibits senescence and also influences the senescence-associated secretory phenotype (SASP), which confers anticancer drug resistance independently of apoptosis. Mechanistically, iASPP is transcriptionally elevated by the p65 subunit of NF-κB in senescent cells and then translocates to the nucleus, where it binds p53 and NF-κBp65. This binding inhibits their transcriptional activities toward p21 and the key SASP factors interleukin (IL)-6/IL-8, respectively, and subsequently prevents senescence. Of note, we observed that iASPP knockdown sensitizes apoptosis-resistant cancers to doxorubicin treatment by promoting senescence both in vitro and in vivo We conclude that iASPP integrates the NF-κBp65- and p53-signaling pathways and thereby regulates cell fate in response to TIS, leading to chemotherapy resistance. These findings suggest that iASPP inhibition might be a strategy that could help restore senescence in cancer cells and improve outcomes of chemotherapy-based therapies.
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Affiliation(s)
- Huayi Li
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China
| | - Wenxin Zhang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China
| | - Kunming Zhao
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China
| | - Dong Zhao
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China
| | - Shanliang Zheng
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China
| | - Ying Hu
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China .,Shenzhen Graduate School of Harbin Institute of Technology, Shenzhen 518055, China
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10
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Tao S, Pan S, Gu C, Wei L, Kang N, Xie Y, Liu J. Characterization and engineering of broadly reactive monoclonal antibody against hepatitis B virus X protein that blocks its interaction with DDB1. Sci Rep 2019; 9:20323. [PMID: 31889135 PMCID: PMC6937242 DOI: 10.1038/s41598-019-56819-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 12/17/2019] [Indexed: 12/20/2022] Open
Abstract
Hepatitis B virus (HBV) X protein (HBx) plays diverse roles in both viral life cycle and HBV-related carcinogenesis. Its interaction with DNA damage-binding protein 1 (DDB1) was shown to be essential for engendering cellular conditions favorable for optimal viral transcription and replication. Previously, we described a mouse monoclonal antibody against HBx (anti-HBx 2A7) recognizing HBx encoded by representative strains from 7 of 8 known HBV genotypes. In this work, we further characterized 2A7 in order to explore its potential usefulness in HBx-targeting applications. We demonstrated that 2A7 recognizes a linear epitope mapped to L89PKVLHKR96 on HBx, a segment that is highly conserved across genotypes and coincidentally overlaps with the DDB1-interacting segment. HBx-DDB1 binding could be inhibited by 2A7 in vitro, suggesting therapeutic potential. Nucleic acid and amino acid sequences of 2A7 were then obtained, which allowed construction of recombinant antibody and single chain variable fragments (scFv). 2A7-derived recombinant antibody and scFv recapitulate 2A7's HBx-binding capacity and epitope specificity. We also reported preliminary results using cell-penetrating peptide for delivering 2A7 antibody across cell membrane to target intracellular HBx. Anti-HBx 2A7 and 2A7-derived scFv characterized here may give rise to novel HBx-targeting diagnostics and therapeutics for HBV- and HBx-related pathologies.
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Affiliation(s)
- Shuai Tao
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Department of Microbiology and Parasitology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Shaokun Pan
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Department of Microbiology and Parasitology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, China.,National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai, China
| | - Chenjian Gu
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Department of Microbiology and Parasitology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Lili Wei
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Department of Microbiology and Parasitology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Ning Kang
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Department of Microbiology and Parasitology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Youhua Xie
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Department of Microbiology and Parasitology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, China.
| | - Jing Liu
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Department of Microbiology and Parasitology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, China. .,Key Laboratory of Medical Epigenetics and Metabolism, Institutes of Biomedical Sciences, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, China.
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Liu ZZ, Kuang WL, Zeng WJ, Xiao JY, Tian YQ. Downregulation of iASPP Expression Suppresses Proliferation, Invasion and Increases Chemosensitivity to Paclitaxel of Head and Neck Squamous Cell Carcinoma In Vitro. ACTA ACUST UNITED AC 2019; 34:184-193. [PMID: 31601301 DOI: 10.24920/003558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Objective Our previous study has revealed that iASPP is elevated in human head and neck squamous cell carcinoma (HNSCC) and iASPP overexpression signifcantly correlates with tumor malignant progression and poor survival of HNSCC. This study investigated the function of iASPP playing in proliferation and invasion of HNSCC in vitro. Methods HNSCC cell line Tu686 transfected with Lentiviral vector-mediated iASPP-specific shRNA and control shRNA were named the shRNA-iASPP group and shRNA-NC group, respectively. The non-infected Tu686 cells were named the CON group. CCK-8 assay, flow cytometry, transwell invasion assay were performed to detect the effects of iASPP inhibition in vitro. Results Our results demonstrated that the proliferation of shRNA-iASPP cells at the time of 72 h (F=32.459, P=0.000), 96 h (F=51.407, P=0.000), 120 h (F=35.125, P=0.000) post-transfection, was significantly lower than that of shRNA-NC cells and CON cells. The apoptosis ratio of shRNA-iASPP cells was 9.42% ± 0.39% (F=299.490, P=0.000), which was significantly higher than that of CON cells (2.80% ± 0.42%) and shRNA-NC cells (3.18% ± 0.28%). The percentage of shRNA-iASPP cells in G0/G1 phase was 74.65% ± 1.09% (F=388.901, P=0.000), which was strikingly increased, compared with that of CON cells (55.19% ± 1.02%) and shRNA-NC cells (54.62% ± 0.88%). The number of invading cells was 56 ± 4 in the shRNA-iASPP group (F=84.965, P=0.000), which decreased significantly, compared with the CON group (111 ± 3) and the shRNA-NC group (105 ± 8). The survival rate of shRNA-iASPP cells administrated with paclitaxel was highly decreased, compared with CON cells and shRNA-NC cells (F=634.841, P=0.000). Conclusion These results suggest iASPP may play an important role in progression and aggressive behavior of HNSCC and may be an efficient chemotherapeutic target for the treatment of HNSCC.
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Affiliation(s)
- Zheng-Zheng Liu
- Department of Oncology, , Xiangya Hospital, Central South University, Changsha 410008, China
| | - Wei-Lu Kuang
- Department of Oncology, , Xiangya Hospital, Central South University, Changsha 410008, China
| | - Wen-Jing Zeng
- Department of Otolaryngology Head and Neck Surgery, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Jian-Yun Xiao
- Department of Pharmacy, , Xiangya Hospital, Central South University, Changsha 410008, China
| | - Yong-Quan Tian
- Department of Pharmacy, , Xiangya Hospital, Central South University, Changsha 410008, China
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12
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Zhou Y, Millott R, Kim HJ, Peng S, Edwards RA, Skene-Arnold T, Hammel M, Lees-Miller SP, Tainer JA, Holmes CFB, Glover JNM. Flexible Tethering of ASPP Proteins Facilitates PP-1c Catalysis. Structure 2019; 27:1485-1496.e4. [PMID: 31402222 DOI: 10.1016/j.str.2019.07.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 06/14/2019] [Accepted: 07/22/2019] [Indexed: 12/15/2022]
Abstract
ASPP (apoptosis-stimulating proteins of p53) proteins bind PP-1c (protein phosphatase 1) and regulate p53 impacting cancer cell growth and apoptosis. Here we determine the crystal structure of the oncogenic ASPP protein, iASPP, bound to PP-1c. The structure reveals a 1:1 complex that relies on interactions of the iASPP SILK and RVxF motifs with PP-1c, plus interactions of the PP-1c PxxPxR motif with the iASPP SH3 domain. Small-angle X-ray scattering analyses suggest that the crystal structure undergoes slow interconversion with more extended conformations in solution. We show that iASPP, and the tumor suppressor ASPP2, enhance the catalytic activity of PP-1c against the small-molecule substrate, pNPP as well as p53. The combined results suggest that PxxPxR binding to iASPP SH3 domain is critical for complex formation, and that the modular ASPP-PP-1c interface provides dynamic flexibility that enables functional binding and dephosphorylation of p53 and other diverse protein substrates.
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Affiliation(s)
- Yeyun Zhou
- Department of Biochemistry, University of Alberta, Edmonton, AB T6G 2H7, Canada
| | - Robyn Millott
- Department of Biochemistry, University of Alberta, Edmonton, AB T6G 2H7, Canada
| | - Hyeong Jin Kim
- Department of Biochemistry, University of Alberta, Edmonton, AB T6G 2H7, Canada
| | - Shiyun Peng
- Department of Biochemistry, University of Alberta, Edmonton, AB T6G 2H7, Canada
| | - Ross A Edwards
- Department of Biochemistry, University of Alberta, Edmonton, AB T6G 2H7, Canada
| | - Tamara Skene-Arnold
- Department of Biochemistry, University of Alberta, Edmonton, AB T6G 2H7, Canada
| | - Michal Hammel
- Molecular Biophysics & Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Susan P Lees-Miller
- Department of Biochemistry and Molecular Biology, Arnie Charbonneau Cancer Institute, University of Calgary, Calgary, AB, Canada
| | - John A Tainer
- Molecular Biophysics & Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA; Department of Molecular and Cellular Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA
| | - Charles F B Holmes
- Department of Biochemistry, University of Alberta, Edmonton, AB T6G 2H7, Canada.
| | - J N Mark Glover
- Department of Biochemistry, University of Alberta, Edmonton, AB T6G 2H7, Canada.
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13
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Epigenetic Regulation of iASPP-p63 Feedback Loop in Cutaneous Squamous Cell Carcinoma. J Invest Dermatol 2019; 139:1658-1671.e8. [DOI: 10.1016/j.jid.2019.01.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 01/09/2019] [Accepted: 01/09/2019] [Indexed: 01/09/2023]
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14
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Wang YS, Zhu H, Li H, Li Y, Zhao B, Jin YH. Ginsenoside compound K inhibits nuclear factor-kappa B by targeting Annexin A2. J Ginseng Res 2019; 43:452-459. [PMID: 31308817 PMCID: PMC6606818 DOI: 10.1016/j.jgr.2018.04.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 04/04/2018] [Accepted: 04/16/2018] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Ginsenoside compound K(C-K), a major metabolite of ginsenoside, exhibits anticancer activity in various cancer cells and animal models. A cell signaling study has shown that C-K inhibited nuclear factor-kappa B (NF-κB) pathway in human astroglial cells and liver cancer cells. However, the molecular targets of C-K and the initiating events were not elucidated. METHODS Interaction between C-K and Annexin A2 was determined by molecular docking and thermal shift assay. HepG2 cells were treated with C-K, followed by a luciferase reporter assay for NF-кB, immunofluorescence imaging for the subcellular localization of Annexin A2 and NF-кB p50 subunit, coimmunoprecipitation of Annexin A2 and NF-кB p50 subunit, and both cell viability assay and plate clone formation assay to determine the cell viability. RESULTS Both molecular docking and thermal shift assay positively confirmed the interaction between Annexin A2 and C-K. This interaction prevented the interaction between Annexin A2 and NF-кB p50 subunit and their nuclear colocalization, which attenuated the activation of NF-кB and the expression of its downstream genes, followed by the activation of caspase 9 and 3. In addition, the overexpression of Annexin A2-K320A, a C-K binding-deficient mutant of Annexin A2, rendered cells to resist C-K treatment, indicating that C-K exerts its cytotoxic activity mainly by targeting Annexin A2. CONCLUSION This study for the first time revealed a cellular target of C-K and the molecular mechanism for its anticancer activity.
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Affiliation(s)
- Yu-Shi Wang
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Science, Jilin University, Changchun, China
| | - Hongyan Zhu
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Science, Jilin University, Changchun, China
| | - He Li
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Science, Jilin University, Changchun, China
| | - Yang Li
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Science, Jilin University, Changchun, China
| | - Bing Zhao
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, China
| | - Ying-Hua Jin
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Science, Jilin University, Changchun, China
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15
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Xia Z, Huang M, Zhu Q, Li Y, Ma Q, Wang Y, Chen X, Li J, Qiu L, Zhang J, Zheng J, Lu B. Cadherin Related Family Member 2 Acts As A Tumor Suppressor By Inactivating AKT In Human Hepatocellular Carcinoma. J Cancer 2019; 10:864-873. [PMID: 30854092 PMCID: PMC6400803 DOI: 10.7150/jca.27663] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 01/02/2019] [Indexed: 02/06/2023] Open
Abstract
Cadherin related family member 2 (CDHR2) belongs to the protocadherin family and is abundant in normal liver, kidney, and colon tissues, but weakly expressed in cancers arising from these tissues. In this study, we demonstrated that CDHR2 was highly expressed in para-cancer tissues of human hepatocellular carcinoma (HCC), but significantly downregulated or silenced in 85.7% (6/7) of HCC cell lines by both semi-quantitative PCR and western blot, and 79.1% (19/24) and 80.2% (89/111) of tumor tissues from patients with HCC by semi-quantitative PCR, and immunohistochemistry, respectively. Interestingly, CpG islands in the promoter of CDHR2 gene were hypermethylated in HCC cell lines and tissues compared with the para-cancer tissues by methylation-specific PCR analysis, leading to transcriptional repression and silencing of CDHR2 in HCC. In addition, CDHR2 overexpression by lentiviral vectors had suppressive effects on HCC cell growth and proliferation, as evidenced by prolonged cell doubling time and reduced colony-forming ability in vitro, as well as by decreased tumorigenicity in vivo. Mechanistically, CDHR2 overexpression resulted in AKT dephosphorylation along with downregulation of cyclooxygenase-2 (COX2), a downstream target of AKT. This effect was reversed by myristoylated AKT, a constitutively active form of AKT, suggesting an involvement of CDHR2-AKT-COX2 axis in the suppression of HCC growth. Taken together, our study identified CDHR2 as a novel tumor suppressor in HCC and provided a new therapeutic target for HCC.
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Affiliation(s)
- Ziyuan Xia
- Department of Biochemical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Meijin Huang
- Department of Oncology, 920th Hospital of PLA Joint Logistics support Force, Yunnan, China
| | - Qiangqiang Zhu
- Department of Biochemical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Yinghua Li
- Department of Biochemical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Qian Ma
- Department of Pathology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Yang Wang
- Department of Pathology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xia Chen
- Yangpu Hospital, Tongji University School of Medicine, Shanghai, China
| | - Jianzhong Li
- Department of Biochemical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Lei Qiu
- Department of Biochemical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Junping Zhang
- Department of Biochemical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Jiaoyang Zheng
- Department of Endocrinology, Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Bin Lu
- Department of Biochemical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, China
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16
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Yin L, Lin Y, Wang X, Su Y, Hu H, Li C, Wang L, Jiang Y. The family of apoptosis-stimulating proteins of p53 is dysregulated in colorectal cancer patients. Oncol Lett 2018; 15:6409-6417. [PMID: 29731851 PMCID: PMC5921073 DOI: 10.3892/ol.2018.8151] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 01/16/2018] [Indexed: 12/21/2022] Open
Abstract
The apoptosis-stimulating protein of p53 (ASPP) family is a newly identified family protein including ASPP1, ASPP2 and inhibitor of ASPP (iASPP), by which the tumor protein 53 (TP53)-mediated apoptotic process is selectively regulated. Downregulation of ASPP1/ASPP2 and upregulation of iASPP were revealed to be associated with a poor prognosis and metastasis in several types of cancer. However, to the best of our knowledge, the expression of ASPP in colorectal cancer (CRC) has not previously been investigated. The present study analyzed ASPP expression in human CRC tissues with multiple clinical and pathological profiles. A total of 41 patients diagnosed with CRC were enrolled in the present study. The expression of ASPP was detected by immunohistochemistry, immunofluorescence and reverse transcription-quantitative polymerase chain reaction. In addition, the variation in ASPP expression was examined in a number of pathological groups. The associations among ASPP expression, and the expression of TP53, plasma carcinoembryonic antigen (CEA) levels and α-fetoprotein (AFP) levels were also investigated. ASPP1 and ASPP2 expression was significantly reduced, while iASPP expression was elevated in CRC samples compared with expression in adjacent non-cancerous tissues. Downregulation of ASPP1 was detected in the TP53-positive group compared with the TP53-negative group. The increase in iASPP expression was correlated with the grade of malignancy, but not with regional lymph node status or metastases. The expression of ASPP2 was negatively correlated with plasma CEA levels. The results of the present study, not only enrich CRC epidemic and pathological data, but also provide valuable indices for CRC clinical treatment and prognosis.
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Affiliation(s)
- Libin Yin
- Department of Colorectal and Anal Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Yuyang Lin
- Department of Colorectal and Anal Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Xu Wang
- Department of Colorectal and Anal Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Yanzhuo Su
- Department of Gastrointestinal Colorectal and Anal Surgery, China Japan Union Hospital of Jilin University, Changchun, Jilin 130000, P.R. China
| | - Han Hu
- Department of Colorectal and Anal Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Chao Li
- Department of Colorectal and Anal Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Lei Wang
- Department of Colorectal and Anal Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Yanfang Jiang
- Genetic Diagnosis Center, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
- Key Laboratory of Zoonosis Research, Ministry of Education, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
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17
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Cheng HW, Chein RJ, Cheng TJ, Wu PS, Wu HY, Hung PF, Wang CJ, Hsu YL, Wong JM, Yuan A, Wong CH, Yang PC, Pan SH. 2-anilino-4-amino-5-aroylthiazole-type compound AS7128 inhibits lung cancer growth through decreased iASPP and p53 interaction. Cancer Sci 2018; 109:832-842. [PMID: 29285847 PMCID: PMC5834782 DOI: 10.1111/cas.13489] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 12/20/2017] [Accepted: 12/25/2017] [Indexed: 12/17/2022] Open
Abstract
Lung cancer is the leading cause of cancer-related death worldwide. Thus, developing novel therapeutic agents has become critical for lung cancer treatment. In this study, compound AS7128 was selected from a 2-million entry chemical library screening and identified as a candidate drug against non-small cell lung cancer in vitro and in vivo. Further investigation indicated that AS7128 could induce cell apoptosis and cell cycle arrest, especially in the mitosis stage. In addition, we also found that iASPP, an oncogenic protein that functionally inhibits p53, might be associated with AS7128 through mass identification. Further exploration indicated that AS7128 treatment could restore the transactivation ability of p53 and, thus, increase the expressions of its downstream target genes, which are related to cell cycle arrest and apoptosis. This occurs through disruption of the interactions between p53 and iASPP in cells. Taken together, AS7128 could bind to iASPP, disrupt the interaction between iASPP and p53, and result in cell cycle arrest and apoptosis. These findings may provide new insight for using iASPP as a therapeutic target for non-small cell lung cancer treatment.
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Affiliation(s)
- Hao-Wei Cheng
- Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
| | | | - Ting-Jen Cheng
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - Pei-Shan Wu
- Genome and Systems Biology Degree Program, National Taiwan University and Academia Sinica, Taipei, Taiwan
| | - Hsin-Yi Wu
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan
| | - Pei-Fang Hung
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Chia-Jen Wang
- Institute of Stem Cell and Translational Cancer Research, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Yuan-Ling Hsu
- Graduate Institute of Medical Genomics and Proteomics, National Taiwan University, Taipei, Taiwan
| | - Jau-Min Wong
- Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan.,Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Ang Yuan
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan.,Department of Emergency Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Chi-Huey Wong
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - Pan-Chyr Yang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.,Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Szu-Hua Pan
- Genome and Systems Biology Degree Program, National Taiwan University and Academia Sinica, Taipei, Taiwan.,Graduate Institute of Medical Genomics and Proteomics, National Taiwan University, Taipei, Taiwan.,Doctoral Degree Program of Translational Medicine, National Taiwan University, Taipei, Taiwan
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18
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Ge W, Zhao K, Wang X, Li H, Yu M, He M, Xue X, Zhu Y, Zhang C, Cheng Y, Jiang S, Hu Y. iASPP Is an Antioxidative Factor and Drives Cancer Growth and Drug Resistance by Competing with Nrf2 for Keap1 Binding. Cancer Cell 2017; 32:561-573.e6. [PMID: 29033244 DOI: 10.1016/j.ccell.2017.09.008] [Citation(s) in RCA: 121] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 06/15/2017] [Accepted: 09/15/2017] [Indexed: 12/14/2022]
Abstract
Reactive oxygen species (ROS) have emerged as important signaling molecules that play crucial roles in carcinogenesis and cytotoxic responses. Nrf2 is the master regulator of ROS balance. Thus, uncovering mechanisms of Nrf2 regulation is important for the development of alternative treatment strategies for cancers. Here, we demonstrate that iASPP, a known p53 inhibitor, lowers ROS independently of p53. Mechanistically, iASPP competes with Nrf2 for Keap1 binding via a DLT motif, leading to decreased Nrf2 ubiquitination and increased Nrf2 accumulation, nuclear translocation, and antioxidative transactivation. This iASPP-Keap1-Nrf2 axis promotes cancer growth and drug resistance both in vitro and in vivo. Thus, iASPP is an antioxidative factor and represents a promising target to improve cancer treatment, regardless of p53 status.
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Affiliation(s)
- Wenjie Ge
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China
| | - Kunming Zhao
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China
| | - Xingwen Wang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China
| | - Huayi Li
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China
| | - Miao Yu
- School of Chemistry, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China
| | - Mengmeng He
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China
| | - Xuting Xue
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China
| | - Yifu Zhu
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China
| | - Cheng Zhang
- Department of Urology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province 150006, China
| | - Yiwei Cheng
- Department of Urology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province 150006, China
| | - Shijian Jiang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China
| | - Ying Hu
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang Province 150001, China; Shenzhen Graduate School of Harbin Institute of Technology, Shenzhen 518055, China.
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19
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Ma Y, Zhu B, Liu X, Liu Z, Jiang L, Wei F, Yu M, Wu F, Zhou H, Xu N, Liu X, Yong L, Wang Y, Wang P, Liang C, He G. iASPP overexpression is associated with clinical outcome in spinal chordoma and influences cellular proliferation, invasion, and sensitivity to cisplatin in vitro. Oncotarget 2017; 8:68365-68380. [PMID: 28978123 PMCID: PMC5620263 DOI: 10.18632/oncotarget.20190] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 08/06/2017] [Indexed: 12/13/2022] Open
Abstract
The oncogenetic function of inhibitory member of the apoptosis stimulating protein of p53 family (iASPP) in chordoma is unclear and remains to elucidate. The expression of iASPP in chordoma tissues and cells, its correlation to clinicopathological parameters and the effect on the patients’ prognosis were evaluated. Cellular proliferation, invasion and cisplatin-response were observed after the iASPP knockdown or overexpression in vitro. Co-Immunoprecipitation assay was used to explore the interaction between iASPP and p53. The regulation of miRNA-124 on the expression and apoptotic function of iASPP was explored after transiently transfecting cells with miRNA-124 mimics or inhibitor. Results indicated that iASPP overexpressed in chordoma tissues and cells. Its overexpression was associated with tumor invasion and local recurrence, and was predictive of patients’ poor prognosis. Cells with iASPP-silence showed a decreased ability of proliferation and invasion, but an increasing sensitivity to cisplatin. Besides, iASPP could combine with p53 in either endogenous or exogenous detection. Post-transcriptionally, miRNA-124 negatively regulated the expression of iASPP, which further led to the changes of apoptosis-related proteins. Thus, iASPP overexpression is associated with the clinical outcome in spinal chordoma and influences cellular proliferation, invasion, and the sensitivity to cisplatin.
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Affiliation(s)
- Yunlong Ma
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China
| | - Bin Zhu
- The Center for Pain Medicine, Peking University Third Hospital, Beijing 100191, China
| | - Xiaoguang Liu
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China
| | - Zhongjun Liu
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China
| | - Liang Jiang
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China
| | - Feng Wei
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China
| | - Miao Yu
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China
| | - Fengliang Wu
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China
| | - Hua Zhou
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China
| | - Nanfang Xu
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China
| | - Xiao Liu
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China
| | - Lei Yong
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China
| | - Yongqiang Wang
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China
| | - Peng Wang
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China
| | - Chen Liang
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China
| | - Guanping He
- Department of Orthopedics, Peking University Third Hospital, Beijing 100191, China
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20
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Yi H, Huang Y, Yang F, Liu W, He S, Hu X. MicroRNA-182 aggravates cerebral ischemia injury by targeting inhibitory member of the ASPP family (iASPP). Arch Biochem Biophys 2017; 620:52-58. [DOI: 10.1016/j.abb.2016.05.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 05/04/2016] [Accepted: 05/04/2016] [Indexed: 10/21/2022]
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21
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Fu S, Zhou RR, Li N, Huang Y, Fan XG. Hepatitis B virus X protein in liver tumor microenvironment. Tumour Biol 2016; 37:10.1007/s13277-016-5406-2. [PMID: 27658781 PMCID: PMC5250643 DOI: 10.1007/s13277-016-5406-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 09/13/2016] [Indexed: 12/18/2022] Open
Abstract
Encoded by the hepatitis B virus, hepatitis B virus X protein (HBx) is a multifunctional, potentially oncogenic protein that acts primarily during the progression from chronic hepatitis B to cirrhosis and hepatocellular carcinoma (HCC). In recent decades, it has been established that chronic inflammation generates a tumor-supporting microenvironment. HCC is a typical chronic inflammation-related cancer, and inflammation is the main risk factor for HCC progression. The viral transactivator HBx plays a pivotal role in the initiation and maintenance of hepatic inflammatory processes through interactions with components of the tumor microenvironment including tumor cells and the surrounding peritumoral stroma. The complex interactions between HBx and this microenvironment are thought to regulate tumor growth, progression, invasion, metastasis, and angiogenesis. In this review, we have summarized the current evidence evaluating the function of HBx and its contribution to the inflammatory liver tumor microenvironment.
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Affiliation(s)
- Sha Fu
- Department of Infectious Diseases, Key Laboratory of Viral Hepatitis of Hunan Province, Xiangya Hospital, Central South University, P. O. Box: 410008, Changsha, China
| | - Rong-Rong Zhou
- Department of Infectious Diseases, Key Laboratory of Viral Hepatitis of Hunan Province, Xiangya Hospital, Central South University, P. O. Box: 410008, Changsha, China.
| | - Ning Li
- Department of Blood Transfusion, Xiangya Hospital, Central South University, Changsha, China
| | - Yan Huang
- Department of Infectious Diseases, Key Laboratory of Viral Hepatitis of Hunan Province, Xiangya Hospital, Central South University, P. O. Box: 410008, Changsha, China
| | - Xue-Gong Fan
- Department of Infectious Diseases, Key Laboratory of Viral Hepatitis of Hunan Province, Xiangya Hospital, Central South University, P. O. Box: 410008, Changsha, China.
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22
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Fu S, Fan XG. Pathophysiological implications of hepatitis B X protein in tumor microenvironment of hepatocellular carcinoma. Shijie Huaren Xiaohua Zazhi 2016; 24:1477-1484. [DOI: 10.11569/wcjd.v24.i10.1477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Hepatitis B X protein (HBx), encoded by hepatitis B virus (HBV), is a multifunctional and potentially oncogenic protein that has significant functions during the progression from chronic hepatitis B to cirrhosis and eventually to hepatocellular carcinoma (HCC). Over the past decades, it has been widely established that chronic inflammation orchestrates a tumor-supporting microenvironment. HCC is a typical chronic inflammation-related cancer and inflammation is the main risk factor for the progression of HCC. As a major viral transactivator, HBx is thought to play a pivotal role in the activation and maintenance of hepatic inflammatory process through interaction with various components of the tumor microenvironment including tumor cell and surrounding peritumoral stroma. Complex interactions between HBx and these cell types in this microenvironment will regulate tumor growth, progression, metastasis, and angiogenesis. In this review, we mainly summarize the current understanding of HBx and its contribution to the inflammatory tumor microenvironment of HBV-related HCC.
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23
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Hu Y, Ge W, Wang X, Sutendra G, Zhao K, Dedeić Z, Slee EA, Baer C, Lu X. Caspase cleavage of iASPP potentiates its ability to inhibit p53 and NF-κB. Oncotarget 2015; 6:42478-90. [PMID: 26646590 PMCID: PMC4767446 DOI: 10.18632/oncotarget.6478] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 11/25/2015] [Indexed: 12/14/2022] Open
Abstract
An intriguing biological question relating to cell signaling is how the inflammatory mediator NF-kB and the tumour suppressor protein p53 can be induced by similar triggers, like DNA damage or infection, yet have seemingly opposing or sometimes cooperative biological functions. For example, the NF-κB subunit RelA/p65 has been shown to inhibit apoptosis, whereas p53 induces apoptosis. One potential explanation may be their co-regulation by common cellular factors: inhibitor of Apoptosis Stimulating p53 Protein (iASPP) is one such common regulator of both RelA/p65 and p53. Here we show that iASPP is a novel substrate of caspases in response to apoptotic stimuli. Caspase cleaves the N-terminal region of iASPP at SSLD294 resulting in a prominent 80kDa fragment of iASPP. This caspase cleavage site is conserved in various species from zebrafish to Homo sapiens. The 80kDa fragment of iASPP translocates from the cytoplasm to the nucleus via the RaDAR nuclear import pathway, independent of p53. The 80kDa iASPP fragment can bind and inhibit p53 or RelA/p65 more efficiently than full-length iASPP. Overall, these data reveal a potential novel regulation of p53 and RelA/p65 activities in response to apoptotic stimuli.
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Affiliation(s)
- Ying Hu
- The School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
- Ludwig Institute for Cancer Research Ltd., Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - Wenjie Ge
- The School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Xingwen Wang
- The School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Gopinath Sutendra
- Ludwig Institute for Cancer Research Ltd., Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - Kunming Zhao
- The School of Life Science and Technology, Harbin Institute of Technology, Harbin, China
| | - Zinaida Dedeić
- Ludwig Institute for Cancer Research Ltd., Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - Elizabeth A. Slee
- Ludwig Institute for Cancer Research Ltd., Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - Caroline Baer
- Ludwig Institute for Cancer Research Ltd., Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - Xin Lu
- Ludwig Institute for Cancer Research Ltd., Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
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Dong P, Ihira K, Hamada J, Watari H, Yamada T, Hosaka M, Hanley SJ, Kudo M, Sakuragi N. Reactivating p53 functions by suppressing its novel inhibitor iASPP: a potential therapeutic opportunity in p53 wild-type tumors. Oncotarget 2015; 6:19968-75. [PMID: 26343523 PMCID: PMC4652980 DOI: 10.18632/oncotarget.4847] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 06/28/2015] [Indexed: 12/22/2022] Open
Abstract
Although mutational inactivation of p53 is found in 50% of all human tumors, a subset of tumors display defective p53 function, but retain wild-type (WT) p53. Here, direct and indirect mechanisms leading to the loss of WT p53 activities are discussed. We summarize the oncogenic roles of iASPP, an inhibitor of WT p53, in promoting proliferation, invasion, drug or radiation-resistance and metastasis. From the therapeutic view, we highlight promising perspectives of microRNA-124, peptide and small molecules that reduce or block iASPP for the treatment of cancer. High iASPP expression enhances proliferation, aggressive behavior, the resistance to radiation/chemotherapy and correlates with poor prognosis in a range of human tumors. Overexpression of iASPP accelerates tumorigenesis and invasion through p53-dependent and p53-independent mechanisms. MicroRNA-124 directly targets iASPP and represses the growth and invasiveness of cancer cells. The disruption of iASPP-p53 interaction by a p53-derived peptide A34 restores p53 function in cancer cells. The inhibition of iASPP phosphorylation with small molecules induces p53-dependent apoptosis and growth suppression. The mechanisms underlying aberrant expression of iASPP in human tumors should be further investigated. Reactivating WT p53 functions by targeting its novel inhibitor iASPP holds promise for potential therapeutic interventions in the treatment of WT p53-containing tumors.
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Affiliation(s)
- Peixin Dong
- Department of Women's Health Educational System, Hokkaido University School of Medicine, Hokkaido University, Sapporo, Japan
| | - Kei Ihira
- Department of Gynecology, Hokkaido University School of Medicine, Hokkaido University, Sapporo, Japan
| | - Junichi Hamada
- Department of Stem Cell Biology, Hokkaido University Graduate School of Medicine, Kita-Ku, Sapporo, Japan
| | - Hidemichi Watari
- Department of Gynecology, Hokkaido University School of Medicine, Hokkaido University, Sapporo, Japan
| | - Takahiro Yamada
- Department of Women's Health Educational System, Hokkaido University School of Medicine, Hokkaido University, Sapporo, Japan
| | - Masayoshi Hosaka
- Department of Gynecology, Hokkaido University School of Medicine, Hokkaido University, Sapporo, Japan
| | - Sharon J.B. Hanley
- Department of Women's Health Educational System, Hokkaido University School of Medicine, Hokkaido University, Sapporo, Japan
| | - Masataka Kudo
- Department of Gynecology, Hokkaido University School of Medicine, Hokkaido University, Sapporo, Japan
| | - Noriaki Sakuragi
- Department of Women's Health Educational System, Hokkaido University School of Medicine, Hokkaido University, Sapporo, Japan
- Department of Gynecology, Hokkaido University School of Medicine, Hokkaido University, Sapporo, Japan
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25
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Kong F, Qi Y, Liu H, Gao F, Yang P, Li Y, Jia Y. Surgery combined with chemotherapy for recurrent gastric cancer achieves better long-term prognosis. Clin Transl Oncol 2015; 17:917-24. [PMID: 26088414 DOI: 10.1007/s12094-015-1327-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 06/09/2015] [Indexed: 01/13/2023]
Abstract
BACKGROUNDS Recurrence is the most important factor associated with death of gastric cancer patients after surgery. The aim of this study was to explore the prognosis factors and the effective therapy for recurrent gastric cancer (RGC) patients after radical resection. METHODS The clinical data of 144 RGC patients who underwent radical resection from January 1999 to March 2004 were reviewed. The 15 clinicopathological factors and treatment modalities on the survival were analyzed. Univariate and multivariate analyses were performed to investigate the prognostic significance of these factors for RGC. RESULTS The early recurrence (<2 years) was found in 90 patients, while late recurrence (≥2 years) occurred in 54 patients. The 2-year cumulative survival rates were 23.8 % for recurrent patients receiving chemotherapy plus surgery vs. 1.2 % in patients having chemotherapy only (p < 0.001), while the median survival time was 11.0 months vs. 6.0 months (p < 0.001). Multivariate analysis indicated TNM stage after the first operation (p = 0.048), iASPP overexpression (p = 0.013), time to recurrence (p < 0.001) and treatment of recurrence (p < 0.001) as independent prognostic factors. CONCLUSIONS Surgery combined with chemotherapy for recurrent gastric cancer patients achieves ideal long-term prognosis, which should perform actively.
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Affiliation(s)
- F Kong
- Department of Oncology, First Teaching Hospital of Tianjin University of TCM, Anshanxi Road, Nankai District, Tianjin, 300193, China.
| | - Y Qi
- Department of Hematology, Tianjin First Center Hospital, Fukang Road, Tianjin, 300192, China
| | - H Liu
- Department of Oncology, First Teaching Hospital of Tianjin University of TCM, Anshanxi Road, Nankai District, Tianjin, 300193, China
| | - F Gao
- Department of Pediatrics, Tianjin Medical University General Hospital, Anshan Road, Tianjin, 300052, China
| | - P Yang
- Department of Oncology, First Teaching Hospital of Tianjin University of TCM, Anshanxi Road, Nankai District, Tianjin, 300193, China
| | - Y Li
- Department of Hematology, Tianjin First Center Hospital, Fukang Road, Tianjin, 300192, China.
| | - Y Jia
- Department of Oncology, First Teaching Hospital of Tianjin University of TCM, Anshanxi Road, Nankai District, Tianjin, 300193, China.
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26
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Wang LL, Xu Z, Peng Y, Li LC, Wu XL. Downregulation of inhibitor of apoptosis‑stimulating protein of p53 inhibits proliferation and promotes apoptosis of gastric cancer cells. Mol Med Rep 2015; 12:1653-8. [PMID: 25846425 PMCID: PMC4464437 DOI: 10.3892/mmr.2015.3587] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Accepted: 02/09/2015] [Indexed: 12/13/2022] Open
Abstract
Gastric cancer (GC) remains one of the leading causes of cancer-associated mortality. Inhibitor of apoptosis-stimulating protein of p53 (iASPP) is a member of the inhibitory apoptosis-stimulating protein p53 family. The overexpression of iASPP has been detected in several types of tumor in humans. However, the role of iASPP in GC remains to be elucidated. The objectives of the present study were to detect the expression of iASPP in GC and examine the potential role of iASPP in GC cell lines. Using reverse transcription-quantitative polymerase chain reaction and western blot analyses, it was identified that the expression of iASPP in GC tissues and GC cell lines was higher compared with that in adjacent normal tissues and in a normal gastric mucosa cell line (GES-1). To examine the role of iASPP in GC cells, the expression of iASPP was inhibited using a small interfering (si)RNA against iASPP and it was observed that iASPP expression was significantly downregulated. Using MTT assays, colony-formation assays and flow cytometry, it was identified that the inhibition of iASPP was able to significantly inhibit the proliferation and colony forming ability and promote apoptosis in GC cells. To examine the role of iASPP in GC cells in vivo, GC cells, which were infected with iASPP-siRNA or control-siRNA were subcutaneously injected into nude mice. It was identified that downregulation of iASPP significantly inhibited tumor growth in vivo. Thus, iASPP may be a potential molecular target in GC therapy.
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Affiliation(s)
- Lu-Lu Wang
- Department of Gastroenterology, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
| | - Zhong Xu
- Department of Gastroenterology, Guizhou Provincial People's Hospital, The Affiliated People's Hospital of Guiyang Medical University, Guiyang, Guizhou 550002, P.R. China
| | - Yang Peng
- Department of Gastroenterology, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
| | - Lu-Chun Li
- Department of Gastroenterology, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
| | - Xiao-Ling Wu
- Department of Gastroenterology, Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, P.R. China
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27
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Lu X, Ma P, Shi Y, Yao M, Hou L, Zhang P, Jiang L. NF-κB increased expression of 17β-hydroxysteroid dehydrogenase 4 promotes HepG2 proliferation via inactivating estradiol. Mol Cell Endocrinol 2015; 401:1-11. [PMID: 25448063 DOI: 10.1016/j.mce.2014.11.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 11/15/2014] [Accepted: 11/20/2014] [Indexed: 01/27/2023]
Abstract
Hepatocellular carcinoma (HCC) arises in a setting of chronic inflammation induced by inflammatory cytokines, such as nuclear factor-kappaB (NF-κB). HCC is a male-predominant cancer that can be attenuated by estradiol (E2) in vitro and in vivo. Although 17β-hydroxysteroid dehydrogenase 4 (HSD17B4) has been implicated as an estradiol-inactivating enzyme, and its promoter sequence contains two putative NF-κB elements: it is currently unknown whether HSD17B4 is the link between inflammation, estradiol and proliferation in hepatoma cells. In this study, HepG2 cells were used to investigate the role of HSD17B4 in the proliferation of liver cancer cells treated with the NF-κB activator, tumor necrosis factor-alpha (TNF-α), with the inhibitor of NF-κB activation, pyrrolidinedithiocarbamate (PDTC), or with a related specific siRNA. We demonstrated that the human HSD17B4 gene is a target for NF-κB activation in inflammation-stimulated HepG2 cells. HSD17B4 is up-regulated via the binding of activated NF-κB to the distal NF-κB-responsive element via TNF-α stimulation, which then promotes cell proliferation by decreasing the levels of E2 and enhancing the expression of interleukin 6 (IL-6), cyclin D1 and proliferating cell nuclear antigen (PCAN). These results from HepG2 cells are consistent with the observation that HSD17B4 is highly expressed and activated NF-κB is highly co-localized with the NF-κB-responsive element of HSD17B4 in liver tumor tissues from HCC patients. Our findings indicate for the first time that HSD17B4 plays an important role in aggravated HCC progression and provides a novel therapeutic target for HCC.
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Affiliation(s)
- Xin Lu
- Department of Biochemistry and Molecular Biology, The Key Laboratory of Neurobiology and Vascular Biology, China Administration of Education, Hebei Medical University, No. 361 Zhongshan East Road, Shijiazhuang 050017, China
| | - Panpan Ma
- Department of Biochemistry and Molecular Biology, The Key Laboratory of Neurobiology and Vascular Biology, China Administration of Education, Hebei Medical University, No. 361 Zhongshan East Road, Shijiazhuang 050017, China
| | - Yun Shi
- Department of Biochemistry and Molecular Biology, The Key Laboratory of Neurobiology and Vascular Biology, China Administration of Education, Hebei Medical University, No. 361 Zhongshan East Road, Shijiazhuang 050017, China
| | - Min Yao
- Department of Biochemistry and Molecular Biology, The Key Laboratory of Neurobiology and Vascular Biology, China Administration of Education, Hebei Medical University, No. 361 Zhongshan East Road, Shijiazhuang 050017, China
| | - Lianguo Hou
- Department of Biochemistry and Molecular Biology, The Key Laboratory of Neurobiology and Vascular Biology, China Administration of Education, Hebei Medical University, No. 361 Zhongshan East Road, Shijiazhuang 050017, China
| | - Pingping Zhang
- Department of Biochemistry and Molecular Biology, The Key Laboratory of Neurobiology and Vascular Biology, China Administration of Education, Hebei Medical University, No. 361 Zhongshan East Road, Shijiazhuang 050017, China
| | - Lingling Jiang
- Department of Biochemistry and Molecular Biology, The Key Laboratory of Neurobiology and Vascular Biology, China Administration of Education, Hebei Medical University, No. 361 Zhongshan East Road, Shijiazhuang 050017, China.
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28
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Chen Y, Yan W, He S, Chen J, Chen D, Zhang Z, Liu Z, Ding X, Wang A. In vitro effect of iASPP on cell growth of oral tongue squamous cell carcinoma. Chin J Cancer Res 2014; 26:382-90. [PMID: 25232209 DOI: 10.3978/j.issn.1000-9604.2014.07.05] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2014] [Accepted: 07/24/2014] [Indexed: 01/28/2023] Open
Abstract
iASPP is an inhibitory member of the apoptosis-stimulating proteins of P53 (ASPP) family. iASPP is over expressed in several malignant tumors and potentially affects cancer progression. However, the expression and potential role of iASPP in oral tongue squamous cell carcinoma (OTSCC) have not been addressed. In our study, we detected iASPP expression in OTSCC by immunohistochemistry. iASPP expression is up-regulated in OTSCC tissues. Moreover, in clinical pathology specimens, we found that increased iASPP expression correlates with poor differentiation and lymph node metastasis. Using multicellular tumor spheroids (MTS) and flow cytometry, we demonstrated that iASPP down-regulation arrests OTSCC cells at the G0/G1 phase, induces OTSCC cell apoptosis and inhibits OTSCC cell proliferation. These results indicate that iASPP plays a significant role in the progression of OTSCC and may serve as a biomarker or therapeutic target for OTSCC patients.
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Affiliation(s)
- Yu Chen
- 1 Department of Oral & Maxillofacial Surgery, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China, 2 Department of Stomatology, First Affiliated Hospital of Jinan University, Guangzhou 510630, China ; 3 Operation Room, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China ; 4 Department of Stomatology, Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China
| | - Wangxiang Yan
- 1 Department of Oral & Maxillofacial Surgery, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China, 2 Department of Stomatology, First Affiliated Hospital of Jinan University, Guangzhou 510630, China ; 3 Operation Room, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China ; 4 Department of Stomatology, Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China
| | - Shuqi He
- 1 Department of Oral & Maxillofacial Surgery, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China, 2 Department of Stomatology, First Affiliated Hospital of Jinan University, Guangzhou 510630, China ; 3 Operation Room, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China ; 4 Department of Stomatology, Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China
| | - Jiechun Chen
- 1 Department of Oral & Maxillofacial Surgery, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China, 2 Department of Stomatology, First Affiliated Hospital of Jinan University, Guangzhou 510630, China ; 3 Operation Room, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China ; 4 Department of Stomatology, Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China
| | - Dan Chen
- 1 Department of Oral & Maxillofacial Surgery, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China, 2 Department of Stomatology, First Affiliated Hospital of Jinan University, Guangzhou 510630, China ; 3 Operation Room, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China ; 4 Department of Stomatology, Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China
| | - Zhaoqiang Zhang
- 1 Department of Oral & Maxillofacial Surgery, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China, 2 Department of Stomatology, First Affiliated Hospital of Jinan University, Guangzhou 510630, China ; 3 Operation Room, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China ; 4 Department of Stomatology, Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China
| | - Zhiguo Liu
- 1 Department of Oral & Maxillofacial Surgery, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China, 2 Department of Stomatology, First Affiliated Hospital of Jinan University, Guangzhou 510630, China ; 3 Operation Room, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China ; 4 Department of Stomatology, Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China
| | - Xueqiang Ding
- 1 Department of Oral & Maxillofacial Surgery, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China, 2 Department of Stomatology, First Affiliated Hospital of Jinan University, Guangzhou 510630, China ; 3 Operation Room, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China ; 4 Department of Stomatology, Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China
| | - Anxun Wang
- 1 Department of Oral & Maxillofacial Surgery, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China, 2 Department of Stomatology, First Affiliated Hospital of Jinan University, Guangzhou 510630, China ; 3 Operation Room, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China ; 4 Department of Stomatology, Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China
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29
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Robertson CL, Srivastava J, Siddiq A, Gredler R, Emdad L, Rajasekaran D, Akiel M, Shen XN, Guo C, Giashuddin S, Wang XY, Ghosh S, Subler MA, Windle JJ, Fisher PB, Sarkar D. Genetic deletion of AEG-1 prevents hepatocarcinogenesis. Cancer Res 2014; 74:6184-93. [PMID: 25193383 DOI: 10.1158/0008-5472.can-14-1357] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Activation of the oncogene AEG-1 (MTDH, LYRIC) has been implicated recently in the development of hepatocellular carcinoma (HCC). In mice, HCC can be initiated by exposure to the carcinogen DEN, which has been shown to rely upon activation of NF-κB in liver macrophages. Because AEG-1 is an essential component of NF-κB activation, we interrogated the susceptibility of mice lacking the AEG-1 gene to DEN-induced hepatocarcinogenesis. AEG-1-deficient mice displayed resistance to DEN-induced HCC and lung metastasis. No difference was observed in the response to growth factor signaling or activation of AKT, ERK, and β-catenin, compared with wild-type control animals. However, AEG-1-deficient hepatocytes and macrophages exhibited a relative defect in NF-κB activation. Mechanistic investigations showed that IL6 production and STAT3 activation, two key mediators of HCC development, were also deficient along with other biologic and epigenetics findings in the tumor microenvironment, confirming that AEG-1 supports an NF-κB-mediated inflammatory state that drives HCC development. Overall, our findings offer in vivo proofs that AEG-1 is essential for NF-κB activation and hepatocarcinogenesis, and they reveal new roles for AEG-1 in shaping the tumor microenvironment for HCC development.
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Affiliation(s)
- Chadia L Robertson
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia. Department of Biochemistry, Virginia Commonwealth University, Richmond, Virginia
| | - Jyoti Srivastava
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Ayesha Siddiq
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Rachel Gredler
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Luni Emdad
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Devaraja Rajasekaran
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Maaged Akiel
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Xue-Ning Shen
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Chunqing Guo
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Shah Giashuddin
- Department of Pathology, New York Hospital Medical Center, Flushing, New York, New York
| | - Xiang-Yang Wang
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Shobha Ghosh
- Department of Internal Medicine, Virginia Commonwealth University, Richmond, Virginia
| | - Mark A Subler
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia
| | - Jolene J Windle
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia. Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia
| | - Paul B Fisher
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia. Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia. VCU Institute of Molecular Medicine, Virginia Commonwealth University, Richmond, Virginia
| | - Devanand Sarkar
- Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, Virginia. Massey Cancer Center, Virginia Commonwealth University, Richmond, Virginia. VCU Institute of Molecular Medicine, Virginia Commonwealth University, Richmond, Virginia.
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30
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Chang KC, Chang Y, Wang LHC, Tsai HW, Huang W, Su IJ. Pathogenesis of virus-associated human cancers: Epstein–Barr virus and hepatitis B virus as two examples. J Formos Med Assoc 2014; 113:581-90. [DOI: 10.1016/j.jfma.2013.09.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Revised: 08/02/2013] [Accepted: 09/02/2013] [Indexed: 12/12/2022] Open
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31
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Kim JW, Roh JL, Park Y, Cho KJ, Choi SH, Nam SY, Kim SY. Cytoplasmic iASPP expression as a novel prognostic indicator in oral cavity squamous cell carcinoma. Ann Surg Oncol 2014; 22:662-9. [PMID: 25149434 DOI: 10.1245/s10434-014-4003-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Indexed: 02/06/2023]
Abstract
BACKGROUND Inhibitor of apoptosis-stimulating protein of p53 (iASPP) is a key inhibitor of tumor suppressor p53 that is overexpressed in several human cancers; however, its role in oral cavity squamous cell carcinomas (OSCC) remains unknown. The present study investigated the prognostic role of iASPP in patients with OSCC. METHODS This study included 186 OSCC patients who underwent curative surgery at our institution between 2000 and 2011. Cytoplasmic and nuclear iASPP expression were examined separately by immunohistochemistry, and dichotomized to low and high. Clinicopathological variables associated with locoregional control (LRC), disease-free survival (DFS), and overall survival (OS) were identified by univariate and multivariate analyses. RESULTS Patients were followed-up for a median period of 74 months (range 16-166 months), and 5-year LRC, DFS, and OS was 73.6, 70.2, and 75.3 %, respectively. High iASPP immunostaining reactivity was detected in the cytoplasm and nucleus in 132 (71.0 %) and 93 (50.0 %) patients, respectively. In univariate analysis, pathologic nodal metastasis, advanced overall stage III-IV, lymphovascular invasion, and cytoplasmic iASPP were significantly associated with poor LRC, DFS, and OS (p < 0.05). High-grade and positive resection margins were significant factors associated with poor DFS and OS (p < 0.02). In multivariate analysis, N classification, lymphovascular invasion, and cytoplasmic iASPP expression remained independent variables for LRC, DFS, and OS (p < 0.05). CONCLUSION High iASPP expression in the tumor cell cytoplasm is associated with poor outcomes of OSCC patients in terms of recurrence and survival, suggesting a role for iASPP as a novel biomarker and therapeutic target for OSCC.
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Affiliation(s)
- Ji Won Kim
- Department of Otolaryngology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
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32
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Generation of a monoclonal antibody specific to a new candidate tumor suppressor, cell adhesion molecule 2. Tumour Biol 2014; 35:7415-22. [DOI: 10.1007/s13277-014-1980-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 04/15/2014] [Indexed: 10/25/2022] Open
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33
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Chikh A, Sanzà P, Raimondi C, Akinduro O, Warnes G, Chiorino G, Byrne C, Harwood CA, Bergamaschi D. iASPP is a novel autophagy inhibitor in keratinocytes. J Cell Sci 2014; 127:3079-93. [PMID: 24777476 DOI: 10.1242/jcs.144816] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The protein iASPP (encoded by PPP1R13L) is an evolutionarily conserved p53 inhibitor, the expression of which is often upregulated in human cancers. We have recently shown that iASPP is a crucial regulator of epidermal homeostasis. Here, we report that iASPP also acts as autophagy inhibitor in keratinocytes. Our data show that depletion of iASPP protects keratinocytes from apoptosis by modulating the expression of Noxa (also known as PMAIP1). In our model, iASPP expression can affect the fission-fusion cycle, mass and shape of mitochondria. iASPP-silenced keratinocytes display disorganization of cytosolic compartments and increased metabolic stress caused by deregulation of mTORC1 signaling. Moreover, increased levels of lipidated LC3 protein confirmed the activation of autophagy in iASPP-depleted cells. We have identified a novel mechanism modulating autophagy in keratinocytes that relies upon iASPP expression specifically reducing the interaction of Atg5-Atg12 with Atg16L1, an interaction that is essential for autophagosome formation or maturation. Using organotypic culture, we further explored the link between autophagy and differentiation, and we showed that impairing autophagy affects epidermal terminal differentiation. Our data provide an alternative mechanism to explain how epithelial integrity is maintained against environmental stressors and might also improve the understanding of the etiology of skin diseases that are characterized by defects in differentiation and DNA damage responses.
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Affiliation(s)
- Anissa Chikh
- Centre for Cutaneous Research, Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, UK
| | - Paolo Sanzà
- Centre for Cutaneous Research, Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, UK
| | - Claudio Raimondi
- Centre for Diabetes, Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, UK
| | - Olufolake Akinduro
- Centre for Cutaneous Research, Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, UK
| | - Gary Warnes
- Flow Cytometry Core Facility, Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, UK
| | - Giovanna Chiorino
- Cancer Genomic Laboratory, Edo ed Elvo Tempia Foundation, 13900 Biella, Italy
| | - Carolyn Byrne
- Centre for Cutaneous Research, Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, UK
| | - Catherine A Harwood
- Centre for Cutaneous Research, Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, UK
| | - Daniele Bergamaschi
- Centre for Cutaneous Research, Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AT, UK
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Jia Y, Peng L, Rao Q, Xing H, Huai L, Yu P, Chen Y, Wang C, Wang M, Mi Y, Wang J. Oncogene iASPP enhances self‐renewal of hematopoietic stem cells and facilitates their resistance to chemotherapy and irradiation. FASEB J 2014; 28:2816-27. [DOI: 10.1096/fj.13-244632] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yujiao Jia
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeTianjinChina
| | - Leiwen Peng
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeTianjinChina
| | - Qing Rao
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeTianjinChina
| | - Haiyan Xing
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeTianjinChina
| | - Lei Huai
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeTianjinChina
| | - Pei Yu
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeTianjinChina
| | - Yirui Chen
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeTianjinChina
| | - Cuicui Wang
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeTianjinChina
| | - Min Wang
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeTianjinChina
| | - Yingchang Mi
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeTianjinChina
| | - Jianxiang Wang
- State Key Laboratory of Experimental HematologyInstitute of Hematology and Blood Diseases HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeTianjinChina
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35
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Zhao WH, Wu SQ, Zhang YD. Downregulation of miR-124 promotes the growth and invasiveness of glioblastoma cells involving upregulation of PPP1R13L. Int J Mol Med 2013; 32:101-7. [PMID: 23624869 DOI: 10.3892/ijmm.2013.1365] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 03/12/2013] [Indexed: 12/13/2022] Open
Abstract
microRNA-124 (miR-124) plays an important role in regulating growth, invasiveness, stem-like traits, differentiation and apoptosis of glioblastoma cells. PPP1R3L, an inhibitory member of the apoptosis-stimulating protein of p53 family (IASPP), is also able to affect growth, cell cycle progression, metastasis and apoptosis of various types of cancer. To investigate the regulation of PPP1R13L expression by miR-124 and their effects on proliferation, cell cycle transition and invasion in glioblastoma cells, U251 and U373 glioblastoma cells were transfected with miR-124 mimics, its negative control (NC) or an inhibitor. We found that miR-124 was downregulated in glioblastoma tissues, and inversely regulated PPP1R13L expression in U251 and U373 glioblastoma cells. PPP1R13L was found to be a direct target of miR-124 in glioblastoma cells. Overexpression of miR-124 inhibited proliferation, G1/S transition and invasiveness in glioblastoma cells. miR-124 downregulation-mediated malignant progression of glioblastoma was partly attributed to increased PPP1R13L expression. Consequently, our findings provide a molecular basis for the role of miR-124/PPP1R13L in the progression of human glioblastoma and suggest a novel target for the treatment of glioblastoma.
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Affiliation(s)
- Wei-Hua Zhao
- National Hepatobiliary and Enteric Surgery Research Center, Central South University, Changsha 410008, P.R. China
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36
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Elevated expression of iASPP correlates with poor prognosis and chemoresistance/radioresistance in FIGO Ib1-IIa squamous cell cervical cancer. Cell Tissue Res 2013; 352:361-9. [DOI: 10.1007/s00441-013-1569-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Accepted: 01/16/2013] [Indexed: 02/04/2023]
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37
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Elevated expression of iASPP in head and neck squamous cell carcinoma and its clinical significance. Med Oncol 2012; 29:3381-8. [DOI: 10.1007/s12032-012-0306-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2012] [Accepted: 07/04/2012] [Indexed: 01/24/2023]
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38
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Cai Y, Qiu S, Gao X, Gu SZ, Liu ZJ. iASPP inhibits p53-independent apoptosis by inhibiting transcriptional activity of p63/p73 on promoters of proapoptotic genes. Apoptosis 2012; 17:777-83. [DOI: 10.1007/s10495-012-0728-z] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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39
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Luedde T, Schwabe RF. NF-κB in the liver--linking injury, fibrosis and hepatocellular carcinoma. Nat Rev Gastroenterol Hepatol 2011; 8:108-18. [PMID: 21293511 PMCID: PMC3295539 DOI: 10.1038/nrgastro.2010.213] [Citation(s) in RCA: 972] [Impact Index Per Article: 74.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Hepatic cirrhosis and hepatocellular carcinoma (HCC) are the most common causes of death in patients with chronic liver disease. Chronic liver injury of virtually any etiology triggers inflammatory and wound-healing responses that in the long run promote the development of hepatic fibrosis and HCC. Here, we review the role of the transcription factor nuclear factor-κB (NF-κB), a master regulator of inflammation and cell death, in the development of hepatocellular injury, liver fibrosis and HCC, with a particular focus on the role of NF-κB in different cellular compartments of the liver. We propose that NF-κB acts as a central link between hepatic injury, fibrosis and HCC, and that it may represent a target for the prevention or treatment of liver fibrosis and HCC. However, NF-κB acts as a two-edged sword and inhibition of NF-κB may not only exert beneficial effects but also negatively impact hepatocyte viability, especially when NF-κB inhibition is pronounced. Finding appropriate targets or identifying drugs that either exert only a moderate effect on NF-κB activity or that can be specifically delivered to nonparenchymal cells will be essential to avoid the increase in liver injury associated with complete NF-κB blockade in hepatocytes.
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