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Zambrano-Carrasco J, Zou J, Wang W, Sun X, Li J, Su H. Emerging Roles of Cullin-RING Ubiquitin Ligases in Cardiac Development. Cells 2024; 13:235. [PMID: 38334627 PMCID: PMC10854628 DOI: 10.3390/cells13030235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Revised: 01/18/2024] [Accepted: 01/22/2024] [Indexed: 02/10/2024] Open
Abstract
Heart development is a spatiotemporally regulated process that extends from the embryonic phase to postnatal stages. Disruption of this highly orchestrated process can lead to congenital heart disease or predispose the heart to cardiomyopathy or heart failure. Consequently, gaining an in-depth understanding of the molecular mechanisms governing cardiac development holds considerable promise for the development of innovative therapies for various cardiac ailments. While significant progress in uncovering novel transcriptional and epigenetic regulators of heart development has been made, the exploration of post-translational mechanisms that influence this process has lagged. Culling-RING E3 ubiquitin ligases (CRLs), the largest family of ubiquitin ligases, control the ubiquitination and degradation of ~20% of intracellular proteins. Emerging evidence has uncovered the critical roles of CRLs in the regulation of a wide range of cellular, physiological, and pathological processes. In this review, we summarize current findings on the versatile regulation of cardiac morphogenesis and maturation by CRLs and present future perspectives to advance our comprehensive understanding of how CRLs govern cardiac developmental processes.
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Affiliation(s)
- Josue Zambrano-Carrasco
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (J.Z.-C.); (J.Z.)
| | - Jianqiu Zou
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (J.Z.-C.); (J.Z.)
| | - Wenjuan Wang
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (J.Z.-C.); (J.Z.)
| | - Xinghui Sun
- Department of Biochemistry, University of Nebraska-Lincoln, Lincoln, NE 68588, USA;
| | - Jie Li
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (J.Z.-C.); (J.Z.)
| | - Huabo Su
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA; (J.Z.-C.); (J.Z.)
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
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Jin J, He J, Li X, Ni X, Jin X. The role of ubiquitination and deubiquitination in PI3K/AKT/mTOR pathway: A potential target for cancer therapy. Gene 2023; 889:147807. [PMID: 37722609 DOI: 10.1016/j.gene.2023.147807] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 09/12/2023] [Accepted: 09/15/2023] [Indexed: 09/20/2023]
Abstract
The PI3K/AKT/mTOR pathway controls key cellular processes, including proliferation and tumor progression, and abnormally high activation of this pathway is a hallmark in human cancers. The post-translational modification, such as Ubiquitination and deubiquitination, fine-tuning the protein level and the activity of members in this pathway play a pivotal role in maintaining normal physiological process. Emerging evidence show that the unbalanced ubiquitination/deubiquitination modification leads to human diseases via PI3K/AKT/mTOR pathway. Therefore, a comprehensive understanding of the ubiquitination/deubiquitination regulation of PI3K/AKT/mTOR pathway may be helpful to uncover the underlying mechanism and improve the potential treatment of cancer via targeting this pathway. Herein, we summarize the latest research progress of ubiquitination and deubiquitination of PI3K/AKT/mTOR pathway, systematically discuss the associated crosstalk between them, as well as focus the clinical transformation via targeting ubiquitination process.
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Affiliation(s)
- Jiabei Jin
- Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Health Science Center, Ningbo University, Ningbo, Zhejiang 315211, China
| | - Jian He
- Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Health Science Center, Ningbo University, Ningbo, Zhejiang 315211, China
| | - Xinming Li
- Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Health Science Center, Ningbo University, Ningbo, Zhejiang 315211, China
| | - Xiaoqi Ni
- Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Health Science Center, Ningbo University, Ningbo, Zhejiang 315211, China
| | - Xiaofeng Jin
- Department of Biochemistry and Molecular Biology, Zhejiang Key Laboratory of Pathophysiology, Health Science Center, Ningbo University, Ningbo, Zhejiang 315211, China.
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Sun Z, Chung D, Neelon B, Millar-Wilson A, Ethier SP, Xiao F, Zheng Y, Wallace K, Hardiman G. A Bayesian framework for pathway-guided identification of cancer subgroups by integrating multiple types of genomic data. Stat Med 2023; 42:5266-5284. [PMID: 37715500 DOI: 10.1002/sim.9911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 07/15/2023] [Accepted: 09/05/2023] [Indexed: 09/17/2023]
Abstract
In recent years, comprehensive cancer genomics platforms, such as The Cancer Genome Atlas (TCGA), provide access to an enormous amount of high throughput genomic datasets for each patient, including gene expression, DNA copy number alterations, DNA methylation, and somatic mutation. While the integration of these multi-omics datasets has the potential to provide novel insights that can lead to personalized medicine, most existing approaches only focus on gene-level analysis and lack the ability to facilitate biological findings at the pathway-level. In this article, we propose Bayes-InGRiD (Bayesian Integrative Genomics Robust iDentification of cancer subgroups), a novel pathway-guided Bayesian sparse latent factor model for the simultaneous identification of cancer patient subgroups (clustering) and key molecular features (variable selection) within a unified framework, based on the joint analysis of continuous, binary, and count data. By utilizing pathway (gene set) information, Bayes-InGRiD does not only enhance the accuracy and robustness of cancer patient subgroup and key molecular feature identification, but also promotes biological understanding and interpretation. Finally, to facilitate an efficient posterior sampling, an alternative Gibbs sampler for logistic and negative binomial models is proposed using Pólya-Gamma mixtures of normal to represent latent variables for binary and count data, which yields a conditionally Gaussian representation of the posterior. The R package "INGRID" implementing the proposed approach is currently available in our research group GitHub webpage (https://dongjunchung.github.io/INGRID/).
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Affiliation(s)
- Zequn Sun
- Department of Preventive Medicine, Northwestern University, Chicago, Illinois
| | - Dongjun Chung
- Department of Biomedical Informatics, The Ohio State University, Columbus, Ohio
- The Pelotonia Institute for Immuno-Oncology, The Ohio State University Comprehensive Cancer Center, Columbus, Ohio
| | - Brian Neelon
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, South Carolina
| | | | - Stephen P Ethier
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, South Carolina
| | - Feifei Xiao
- Department of Biostatistics, University of Florida, Gainesville, Florida
| | - Yinan Zheng
- Department of Preventive Medicine, Northwestern University, Chicago, Illinois
| | - Kristin Wallace
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, South Carolina
| | - Gary Hardiman
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, South Carolina
- Faculty of Medicine, Health and Life Sciences, School of Biological Sciences and Institute for Global Food Security, Queen's University Belfast, Belfast, UK
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Taghehchian N, Maharati A, Akhlaghipour I, Zangouei AS, Moghbeli M. PRC2 mediated KLF2 down regulation: a therapeutic and diagnostic axis during tumor progression. Cancer Cell Int 2023; 23:233. [PMID: 37807067 PMCID: PMC10561470 DOI: 10.1186/s12935-023-03086-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 09/29/2023] [Indexed: 10/10/2023] Open
Abstract
Surgery and chemo-radiotherapy are used as the common first-line treatment options in many cancers. However, tumor relapse is observed in many cancer patients following such first-line treatments. Therefore, targeted therapy according to the molecular cancer biology can be very important in reducing tumor recurrence. In this regard, a wide range of monoclonal antibodies against the growth factors and their receptors can offer more targeted treatment in cancer patients. However, due to the importance of growth factors in the normal biology of body cells, side effects can also be observed following the application of growth factor inhibitors. Therefore, more specific factors should be introduced as therapeutic targets with less side effects. Krüppel-like factors 2 (KLF2) belongs to the KLF family of transcription factors that are involved in the regulation of many cellular processes. KLF2 deregulations have been also reported during the progression of many tumors. In the present review we discussed the molecular mechanisms of KLF2 during tumor growth and invasion. It has been shown that the KLF2 as a tumor suppressor is mainly inhibited by the non-coding RNAs (ncRNAs) through the polycomb repressive complex 2 (PRC2) recruitment. This review is an effective step towards introducing the KLF2 as a suitable diagnostic and therapeutic target in cancer patients.
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Affiliation(s)
- Negin Taghehchian
- Medical Genetics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Amirhosein Maharati
- Medical Genetics Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Iman Akhlaghipour
- Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Amir Sadra Zangouei
- Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Meysam Moghbeli
- Department of Medical Genetics and Molecular Medicine, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
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Kreienbühl J, Changkhong S, Orlowski V, Kirschner MB, Opitz I, Meerang M. Cullin 4B Ubiquitin Ligase Is Important for Cell Survival and Regulates TGF-β1 Expression in Pleural Mesothelioma. Int J Mol Sci 2023; 24:13410. [PMID: 37686215 PMCID: PMC10487616 DOI: 10.3390/ijms241713410] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 08/22/2023] [Accepted: 08/26/2023] [Indexed: 09/10/2023] Open
Abstract
We previously demonstrated that cullin 4B (CUL4B) upregulation was associated with worse outcomes of pleural mesothelioma (PM) patients, while the overexpression of its paralog CUL4A was not associated with clinical outcomes. Here, we aimed to identify the distinct roles of CUL4B and CUL4A in PM using an siRNA approach in PM cell lines (ACC Meso-1 and Mero82) and primary culture. The knockdown of CUL4B and CUL4A resulted in significantly reduced colony formation, increased cell death, and delayed cell proliferation. Furthermore, similar to the effect of CUL4A knockdown, downregulation of CUL4B led to reduced expression of Hippo pathway genes including YAP1, CTGF, and survivin. Interestingly, CUL4B and not CUL4A knockdown reduced TGF-β1 and MMP2 expression, suggesting a unique association of CUL4B with this pathway. However, the treatment of PM cells with exogenous TGF-β1 following CUL4B knockdown did not rescue PM cell growth. We further analyzed ACC Meso-1 xenograft tumor tissues treated with the cullin inhibitor, pevonedistat, which targets protein neddylation, and observed the downregulation of human TGF-β1 and MMP2. In summary, our data suggest that CUL4B overexpression is important for tumor cell growth and survival and may drive PM aggressiveness via the regulation of TGF-β1 expression and, furthermore, reveal a new mechanism of action of pevonedistat.
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Affiliation(s)
| | | | | | | | | | - Mayura Meerang
- Department of Thoracic Surgery, University Hospital Zürich, 8091 Zürich, Switzerland (V.O.); (M.B.K.); (I.O.)
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Jin W, Zhang J, Chen X, Yin S, Yu H, Gao F, Yao D. Unraveling the complexity of histone-arginine methyltransferase CARM1 in cancer: From underlying mechanisms to targeted therapeutics. Biochim Biophys Acta Rev Cancer 2023; 1878:188916. [PMID: 37196782 DOI: 10.1016/j.bbcan.2023.188916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/28/2023] [Accepted: 05/12/2023] [Indexed: 05/19/2023]
Abstract
Coactivator-associated arginine methyltransferase 1 (CARM1), a type I protein arginine methyltransferase (PRMT), has been widely reported to catalyze arginine methylation of histone and non-histone substrates, which is closely associated with the occurrence and progression of cancer. Recently, accumulating studies have demonstrated the oncogenic role of CARM1 in many types of human cancers. More importantly, CARM1 has been emerging as an attractive therapeutic target for discovery of new candidate anti-tumor drugs. Therefore, in this review, we summarize the molecular structure of CARM1 and its key regulatory pathways, as well as further discuss the rapid progress in better understanding of the oncogenic functions of CARM1. Moreover, we further demonstrate several representative targeted CARM1 inhibitors, especially focusing on demonstrating their designing strategies and potential therapeutic applications. Together, these inspiring findings would shed new light on elucidating the underlying mechanisms of CARM1 and provide a clue on discovery of more potent and selective CARM1 inhibitors for the future targeted cancer therapy.
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Affiliation(s)
- Wenke Jin
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China; School of Pharmaceutical Sciences, Shenzhen Technology University, Shenzhen 518118, China; Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae, Ministry of Education, and State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Jin Zhang
- School of Pharmacy, Shenzhen University Medical School, Shenzhen University, Shenzhen, Guangdong 518055, China
| | - Xiya Chen
- School of Pharmaceutical Sciences, Shenzhen Technology University, Shenzhen 518118, China; School of Pharmacy, Shenzhen University Medical School, Shenzhen University, Shenzhen, Guangdong 518055, China
| | - Siwen Yin
- School of Nursing, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Haiyang Yu
- Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae, Ministry of Education, and State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China.
| | - Feng Gao
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
| | - Dahong Yao
- School of Pharmaceutical Sciences, Shenzhen Technology University, Shenzhen 518118, China.
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7
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Atri Y, Bharti H, Sahani N, Sarkar DP, Nag A. CUL4A silencing attenuates cervical carcinogenesis and improves Cisplatin sensitivity. Mol Cell Biochem 2023:10.1007/s11010-023-04776-2. [PMID: 37285039 DOI: 10.1007/s11010-023-04776-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 05/21/2023] [Indexed: 06/08/2023]
Abstract
CUL4A is an ubiquitin ligase deregulated in numerous pathologies including cancer and even hijacked by viruses for facilitating their survival and propagation. However, its role in Human papilloma virus (HPV)-mediated cervical carcinogenesis remains elusive. The UALCAN and GEPIA datasets were analyzed to ascertain the transcript levels of CUL4A in cervical squamous cell carcinoma and endocervical adenocarcinoma (CESC) patients. Subsequently, various biochemical assays were employed to explore the functional contribution of CUL4A in cervical carcinogenesis and to shed some light on its involvement in Cisplatin resistance in cervical cancer. Our UALCAN and GEPIA datasets analyses reveal elevated CUL4A transcript levels in cervical squamous cell carcinoma and endocervical adenocarcinoma (CESC) patients that correlate with adverse clinicopathological parameters such as tumor stage and lymph node metastasis. Kaplan-Meier plot and GEPIA assessment depict poor prognosis of CESC patients having high CUL4A expression. Varied biochemical assays illustrate that CUL4A inhibition severely curtails hallmark malignant properties such as cellular proliferation, migration, and invasion of cervical cancer cells. We also show that CUL4A knockdown in HeLa cells causes increased susceptibility and better apoptotic induction toward Cisplatin, a mainstay drug used in cervical cancer treatment. More interestingly, we find reversion of Cisplatin-resistant phenotype of HeLa cells and an augmented cytotoxicity towards the platinum compound upon CUL4A downregulation. Taken together, our study underscores CUL4A as a cervical cancer oncogene and illustrates its potential as a prognosis indicator. Our investigation provides a novel avenue in improving current anti-cervical cancer therapy and overcoming the bottle-neck of Cisplatin resistance.
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Affiliation(s)
- Yama Atri
- Department of Biochemistry, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Hina Bharti
- Department of Biochemistry, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Nandini Sahani
- Department of Biochemistry, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Debi P Sarkar
- Department of Biochemistry, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Alo Nag
- Department of Biochemistry, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India.
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Schindler N, Tonn M, Kellner V, Fung JJ, Lockhart A, Vydzhak O, Juretschke T, Möckel S, Beli P, Khmelinskii A, Luke B. Genetic requirements for repair of lesions caused by single genomic ribonucleotides in S phase. Nat Commun 2023; 14:1227. [PMID: 36869098 PMCID: PMC9984532 DOI: 10.1038/s41467-023-36866-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Accepted: 02/21/2023] [Indexed: 03/05/2023] Open
Abstract
Single ribonucleoside monophosphates (rNMPs) are transiently present in eukaryotic genomes. The RNase H2-dependent ribonucleotide excision repair (RER) pathway ensures error-free rNMP removal. In some pathological conditions, rNMP removal is impaired. If these rNMPs hydrolyze during, or prior to, S phase, toxic single-ended double-strand breaks (seDSBs) can occur upon an encounter with replication forks. How such rNMP-derived seDSB lesions are repaired is unclear. We expressed a cell cycle phase restricted allele of RNase H2 to nick at rNMPs in S phase and study their repair. Although Top1 is dispensable, the RAD52 epistasis group and Rtt101Mms1-Mms22 dependent ubiquitylation of histone H3 become essential for rNMP-derived lesion tolerance. Consistently, loss of Rtt101Mms1-Mms22 combined with RNase H2 dysfunction leads to compromised cellular fitness. We refer to this repair pathway as nick lesion repair (NLR). The NLR genetic network may have important implications in the context of human pathologies.
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Affiliation(s)
- Natalie Schindler
- Johannes Gutenberg University Mainz, Institute for Developmental Neurology (IDN), Biozentrum 1, Hanns-Dieter-Hüsch-Weg 15, 55128, Mainz, Germany.
| | - Matthias Tonn
- Johannes Gutenberg University Mainz, Institute for Developmental Neurology (IDN), Biozentrum 1, Hanns-Dieter-Hüsch-Weg 15, 55128, Mainz, Germany
| | - Vanessa Kellner
- Institute of Molecular Biology (IMB), Ackermannweg 4, 55128, Mainz, Germany.,Department of Biology, New York University, New York, NY, USA
| | - Jia Jun Fung
- Institute of Molecular Biology (IMB), Ackermannweg 4, 55128, Mainz, Germany
| | - Arianna Lockhart
- Institute of Molecular Biology (IMB), Ackermannweg 4, 55128, Mainz, Germany
| | - Olga Vydzhak
- Johannes Gutenberg University Mainz, Institute for Developmental Neurology (IDN), Biozentrum 1, Hanns-Dieter-Hüsch-Weg 15, 55128, Mainz, Germany
| | - Thomas Juretschke
- Institute of Molecular Biology (IMB), Ackermannweg 4, 55128, Mainz, Germany
| | - Stefanie Möckel
- Institute of Molecular Biology (IMB), Ackermannweg 4, 55128, Mainz, Germany
| | - Petra Beli
- Institute of Molecular Biology (IMB), Ackermannweg 4, 55128, Mainz, Germany
| | - Anton Khmelinskii
- Institute of Molecular Biology (IMB), Ackermannweg 4, 55128, Mainz, Germany
| | - Brian Luke
- Johannes Gutenberg University Mainz, Institute for Developmental Neurology (IDN), Biozentrum 1, Hanns-Dieter-Hüsch-Weg 15, 55128, Mainz, Germany. .,Institute of Molecular Biology (IMB), Ackermannweg 4, 55128, Mainz, Germany.
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Zhang L, Li L, Chen X, Yuan S, Xu T, Zhao W, Li M, Wang F, Hoffman RM, Jia L. Evodiamine inhibits ESCC by inducing M-phase cell-cycle arrest via CUL4A/p53/p21 axis and activating noxa-dependent intrinsic and DR4-dependent extrinsic apoptosis. Phytomedicine 2023; 108:154493. [PMID: 36265256 DOI: 10.1016/j.phymed.2022.154493] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 09/17/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Esophageal squamous cell carcinoma (ESCC) is a malignancy with high incidence in several regions of China, and the prognosis of patients with ESCC is unfavorable. Evodiamine (Evo), a small molecule derived from the traditional Chinese herb Evodia rutaecarpa, has shown anti-cancer efficacy in numerous human malignancies but not in ESCC. PURPOSE To determine whether Evo induces cell-cycle arrest and apoptosis in ESCC in vitro and in vivo and elucidate the underlying mechanisms. METHODS ATPlite and colony formation assay were used to validate the inhibiting effect of Evo on three ESCC cells in vitro; Two subcutaneous tumor models of ESCC cells were used to evaluate the anti-ESCC effect of Evo and assess the biosafety of Evo in vivo; RNAseq and Database of KEGG pathway analysis provided a direction for the mechanistic study of Evo; FACS was used to detect Evo-induced cell cycle arrest and cell apoptosis in ESCC cells; Western blot and QPCR were respectively used to detect the level of related genes and proteins in Evo-treated ESCC cells; SiRNA and other experimental techniques were used to identify the molecular mechanism of Evo-induced ESCC cell cycle arrest and cell apoptosis. RESULTS Evo significantly suppressed the growth of ESCC both in vitro and in vivo. Mechanistically, Evo induced M-phase cell-cycle arrest by inactivation of CUL4A E3 ligase, which mediates degradation blockage of p53 and transcriptional activation of p21. With the prolonged treatment time, Evo triggered both Noxa-dependent intrinsic and DR4-dependent extrinsic cell apoptosis in two ESCC cell lines. CONCLUSION Our findings revealed the anti-tumor efficacy and mechanisms of Evo, providing a solid scientific basis for Evo as an attractive choice for ESCC treatment.
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Affiliation(s)
- Li Zhang
- Cancer Institute of Traditional Chinese Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Lihui Li
- Cancer Institute of Traditional Chinese Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xihui Chen
- Cancer Institute of Traditional Chinese Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Shuying Yuan
- Cancer Institute of Traditional Chinese Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Tong Xu
- Cancer Institute of Traditional Chinese Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Weili Zhao
- Cancer Institute of Traditional Chinese Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Meng Li
- Cancer Institute of Traditional Chinese Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Fengying Wang
- Cancer Institute of Traditional Chinese Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Robert M Hoffman
- Department of Surgery, University of California, La Jolla, San Diego, CA, United States; AntiCancer Inc., San Diego, CA, United States
| | - Lijun Jia
- Cancer Institute of Traditional Chinese Medicine, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China.
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Li Y, Fan C, Wang C, Wang L, Yi Y, Mao X, Chen X, Lan T, Wang W, Yu SY. Stress-induced reduction of Na +/H + exchanger isoform 1 promotes maladaptation of neuroplasticity and exacerbates depressive behaviors. Sci Adv 2022; 8:eadd7063. [PMID: 36367929 PMCID: PMC9651740 DOI: 10.1126/sciadv.add7063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 09/23/2022] [Indexed: 05/29/2023]
Abstract
Major depression disorder (MDD) is a neuropsychiatric disorder characterized by abnormal neuronal activity in specific brain regions. A factor that is crucial in maintaining normal neuronal functioning is intracellular pH (pHi) homeostasis. In this study, we show that chronic stress, which induces depression-like behaviors in animal models, down-regulates the expression of the hippocampal Na+/H+ exchanger isoform 1, NHE1, a major determinant of pHi in neurons. Knockdown of NHE1 in CA1 hippocampal pyramidal neurons leads to intracellular acidification, promotes dendritic spine loss, lowers excitatory synaptic transmission, and enhances the susceptibility to stress exposure in rats. Moreover, E3 ubiquitin ligase cullin4A may promote ubiquitination and degradation of NHE1 to induce these effects of an unbalanced pHi on synaptic processes. Electrophysiological data further suggest that the abnormal excitability of hippocampal neurons caused by maladaptation of neuroplasticity may be involved in the pathogenesis of this disease. These findings elucidate a mechanism for pHi homeostasis alteration as related to MDD.
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Affiliation(s)
- Ye Li
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, PR China
| | - Cuiqin Fan
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, PR China
| | - Changmin Wang
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, PR China
| | - Liyan Wang
- Morphological Experimental Center, Shandong University, School of Basic Medical Sciences, 44 Wenhuaxilu Road, Jinan, Shandong 250012, PR China
| | - Yuhang Yi
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, PR China
| | - Xueqin Mao
- Department of Psychology, Qilu Hospital of Shandong University, 107 Wenhuaxilu Road, Jinan, Shandong 250012, PR China
| | - Xiao Chen
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, PR China
| | - Tian Lan
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, PR China
| | - Wenjing Wang
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, PR China
| | - Shu Yan Yu
- Department of Physiology, School of Basic Medical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, PR China
- Shandong Provincial Key Laboratory of Mental Disorders, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, PR China
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Persyn E, Wahlen S, Kiekens L, Taveirne S, Van Loocke W, Van Ammel E, Van Nieuwerburgh F, Taghon T, Vandekerckhove B, Van Vlierberghe P, Leclercq G. TXNIP Promotes Human NK Cell Development but Is Dispensable for NK Cell Functionality. Int J Mol Sci 2022; 23:ijms231911345. [PMID: 36232644 PMCID: PMC9570291 DOI: 10.3390/ijms231911345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 09/13/2022] [Accepted: 09/22/2022] [Indexed: 12/05/2022] Open
Abstract
The ability of natural killer (NK) cells to kill tumor cells without prior sensitization makes them a rising player in immunotherapy. Increased understanding of the development and functioning of NK cells will improve their clinical utilization. As opposed to murine NK cell development, human NK cell development is still less understood. Here, we studied the role of thioredoxin-interacting protein (TXNIP) in human NK cell differentiation by stable TXNIP knockdown or overexpression in cord blood hematopoietic stem cells, followed by in vitro NK cell differentiation. TXNIP overexpression only had marginal effects, indicating that endogenous TXNIP levels are sufficient in this process. TXNIP knockdown, however, reduced proliferation of early differentiation stages and greatly decreased NK cell numbers. Transcriptome analysis and experimental confirmation showed that reduced protein synthesis upon TXNIP knockdown likely caused this low proliferation. Contrary to its profound effects on the early differentiation stages, TXNIP knockdown led to limited alterations in NK cell phenotype, and it had no effect on NK cell cytotoxicity or cytokine production. Thus, TXNIP promotes human NK cell differentiation by affecting protein synthesis and proliferation of early NK cell differentiation stages, but it is redundant for functional NK cell maturation.
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Affiliation(s)
- Eva Persyn
- Laboratory of Experimental Immunology, Department of Diagnostic Sciences, Ghent University, 9000 Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), 9000 Ghent, Belgium
| | - Sigrid Wahlen
- Laboratory of Experimental Immunology, Department of Diagnostic Sciences, Ghent University, 9000 Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), 9000 Ghent, Belgium
| | - Laura Kiekens
- Laboratory of Experimental Immunology, Department of Diagnostic Sciences, Ghent University, 9000 Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), 9000 Ghent, Belgium
| | - Sylvie Taveirne
- Laboratory of Experimental Immunology, Department of Diagnostic Sciences, Ghent University, 9000 Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), 9000 Ghent, Belgium
| | - Wouter Van Loocke
- Cancer Research Institute Ghent (CRIG), 9000 Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, 9000 Ghent, Belgium
| | - Els Van Ammel
- Laboratory of Experimental Immunology, Department of Diagnostic Sciences, Ghent University, 9000 Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), 9000 Ghent, Belgium
| | | | - Tom Taghon
- Laboratory of Experimental Immunology, Department of Diagnostic Sciences, Ghent University, 9000 Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), 9000 Ghent, Belgium
| | - Bart Vandekerckhove
- Laboratory of Experimental Immunology, Department of Diagnostic Sciences, Ghent University, 9000 Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), 9000 Ghent, Belgium
| | - Pieter Van Vlierberghe
- Cancer Research Institute Ghent (CRIG), 9000 Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, 9000 Ghent, Belgium
| | - Georges Leclercq
- Laboratory of Experimental Immunology, Department of Diagnostic Sciences, Ghent University, 9000 Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), 9000 Ghent, Belgium
- Correspondence: ; Tel.: +32-9-332-37-34
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12
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Pastorino F, Capasso M, Brignole C, Giglio S, Bensa V, Cantalupo S, Lasorsa VA, Tondo A, Mura R, Sementa AR, Garaventa A, Ponzoni M, Amoroso L. Italian Precision Medicine in Pediatric Oncology: Moving beyond Actionable Alterations. Int J Mol Sci 2022; 23:ijms231911236. [PMID: 36232538 PMCID: PMC9570321 DOI: 10.3390/ijms231911236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 09/19/2022] [Accepted: 09/20/2022] [Indexed: 11/16/2022] Open
Abstract
Neuroblastoma (NB) is the most common extracranial solid tumor encountered in childhood. Although there has been significant improvement in the outcomes of patients with high-risk disease, the prognosis for patients with metastatic relapse or refractory disease is poor. Hence, the clinical integration of genome sequencing into standard clinical practice is necessary in order to develop personalized therapy for children with relapsed or refractory disease. The PeRsonalizEdMEdicine (PREME) project focuses on the design of innovative therapeutic strategies for patients suffering from relapsed NB. We performed whole exome sequencing (WES) of patient-matched tumor-normal samples to identify genetic variants amenable to precision medicine. Specifically, two patients were studied (First case: a three-year-old male with early relapsed NB; Second case: a 20-year-old male who relapsed 10 years after the first diagnosis of NB). Results were reviewed by a multi-disciplinary molecular tumor board (MTB) and clinical reports were issued to the ordering physician. WES revealed the mutation c.G320C in the CUL4A gene in case 1 and the mutation c.A484G in the PSMC2 gene in case 2. Both patients were treated according to these actionable alterations, with promising results. The effective treatment of NB is one of the main challenges in pediatric oncology. In the era of precision medicine, the need to design new therapeutic strategies for NB is fundamental. Our results demonstrate the feasibility of incorporating clinical WES into pediatric oncology practice.
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Affiliation(s)
- Fabio Pastorino
- Laboratorio di Terapie Sperimentali in Oncologia, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy
- These authors contributed equally to this work
| | - Mario Capasso
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università degli Studi di Napoli Federico II, 80131 Napoli, Italy
- CEINGE Biotecnologie Avanzate, 80131 Napoli, Italy
- These authors contributed equally to this work
| | - Chiara Brignole
- Laboratorio di Terapie Sperimentali in Oncologia, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy
| | - Serena Giglio
- UOC Oncologia, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy
| | - Veronica Bensa
- Laboratorio di Terapie Sperimentali in Oncologia, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy
| | - Sueva Cantalupo
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università degli Studi di Napoli Federico II, 80131 Napoli, Italy
- CEINGE Biotecnologie Avanzate, 80131 Napoli, Italy
| | | | - Annalisa Tondo
- Dipartimento di Oncoematologia, Ospedale Meyer, 50139 Firenze, Italy
| | - Rossella Mura
- Oncoematologia Pediatrica, Ospedale Pediatrico Microcitemico “Antonio Cao” Azienda Ospedaliera Brotzu, 09121 Cagliari, Italy
| | - Angela Rita Sementa
- Dipartimento di Patologia, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy
| | | | - Mirco Ponzoni
- Laboratorio di Terapie Sperimentali in Oncologia, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy
- Correspondence: ; Tel.: +39-0105-636-3539; Fax: +39-0103-779-820
| | - Loredana Amoroso
- UOC Oncologia, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy
- These authors contributed equally to this work
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13
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Su X, Wu W, Zhu Z, Lin X, Zeng Y. The effects of epithelial-mesenchymal transitions in COPD induced by cigarette smoke: an update. Respir Res 2022; 23:225. [PMID: 36045410 PMCID: PMC9429334 DOI: 10.1186/s12931-022-02153-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 08/25/2022] [Indexed: 12/15/2022] Open
Abstract
Cigarette smoke is a complex aerosol containing a large number of compounds with a variety of toxicity and carcinogenicity. Long-term exposure to cigarette smoke significantly increases the risk of a variety of diseases, including chronic obstructive pulmonary disease (COPD) and lung cancer. Epithelial–mesenchymal transition (EMT) is a unique biological process, that refers to epithelial cells losing their polarity and transforming into mobile mesenchymal cells, playing a crucial role in organ development, fibrosis, and cancer progression. Numerous recent studies have shown that EMT is an important pathophysiological process involved in airway fibrosis, airway remodeling, and malignant transformation of COPD. In this review, we summarized the effects of cigarette smoke on the development and progression of COPD and focus on the specific changes and underlying mechanisms of EMT in COPD induced by cigarette smoke. We spotlighted the signaling pathways involved in EMT induced by cigarette smoke and summarize the current research and treatment approaches for EMT in COPD, aiming to provide ideas for potential new treatment and research directions.
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Affiliation(s)
- Xiaoshan Su
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Fujian Medical University, Respirology Medicine Centre of Fujian Province, Quanzhou, China
| | - Weijing Wu
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Fujian Medical University, Respirology Medicine Centre of Fujian Province, Quanzhou, China
| | - Zhixing Zhu
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Fujian Medical University, Respirology Medicine Centre of Fujian Province, Quanzhou, China
| | - Xiaoping Lin
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Fujian Medical University, Respirology Medicine Centre of Fujian Province, Quanzhou, China
| | - Yiming Zeng
- Department of Pulmonary and Critical Care Medicine, The Second Affiliated Hospital of Fujian Medical University, Respirology Medicine Centre of Fujian Province, Quanzhou, China.
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14
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Bano I, Malhi M, Zhao M, Giurgiulescu L, Sajjad H, Kieliszek M. A review on cullin neddylation and strategies to identify its inhibitors for cancer therapy. 3 Biotech 2022; 12:103. [PMID: 35463041 PMCID: PMC8964847 DOI: 10.1007/s13205-022-03162-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 01/29/2022] [Indexed: 11/01/2022] Open
Abstract
The cullin-RING E3 ligases (CRLs) are the biggest components of the E3 ubiquitin ligase protein family, and they represent an essential role in various diseases that occur because of abnormal activation, particularly in tumors development. Regulation of CRLs needs neddylation, a post-translational modification involving an enzymatic cascade that transfers small, ubiquitin-like NEDD8 protein to CRLs. Many previous studies have confirmed neddylation as an enticing target for anticancer drug discoveries, and few recent studies have also found a significant increase in advancement in protein neddylation, including preclinical and clinical target validation to discover the neddylation inhibitor compound. In the present review, we first presented briefly the essence of CRLs' neddylation and its control, systematic analysis of CRLs, followed by the description of a few recorded chemical inhibitors of CRLs neddylation enzymes with recent examples of preclinical and clinical targets. We have also listed various structure-based pointing of protein-protein dealings in the CRLs' neddylation reaction, and last, the methods available to discover new inhibitors of neddylation are elaborated. This review will offer a concentrated, up-to-date, and detailed description of the discovery of neddylation inhibitors.
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15
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Sharma A, Khan H, Singh TG, Grewal AK, Najda A, Kawecka-Radomska M, Kamel M, Altyar AE, Abdel-Daim MM. Pharmacological Modulation of Ubiquitin-Proteasome Pathways in Oncogenic Signaling. Int J Mol Sci 2021; 22:ijms222111971. [PMID: 34769401 PMCID: PMC8584958 DOI: 10.3390/ijms222111971] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/27/2021] [Accepted: 10/28/2021] [Indexed: 12/20/2022] Open
Abstract
The ubiquitin-proteasome pathway (UPP) is involved in regulating several biological functions, including cell cycle control, apoptosis, DNA damage response, and apoptosis. It is widely known for its role in degrading abnormal protein substrates and maintaining physiological body functions via ubiquitinating enzymes (E1, E2, E3) and the proteasome. Therefore, aberrant expression in these enzymes results in an altered biological process, including transduction signaling for cell death and survival, resulting in cancer. In this review, an overview of profuse enzymes involved as a pro-oncogenic or progressive growth factor in tumors with their downstream signaling pathways has been discussed. A systematic literature review of PubMed, Medline, Bentham, Scopus, and EMBASE (Elsevier) databases was carried out to understand the nature of the extensive work done on modulation of ubiquitin-proteasome pathways in oncogenic signaling. Various in vitro, in vivo studies demonstrating the involvement of ubiquitin-proteasome systems in varied types of cancers and the downstream signaling pathways involved are also discussed in the current review. Several inhibitors of E1, E2, E3, deubiquitinase enzymes and proteasome have been applied for treating cancer. Some of these drugs have exhibited successful outcomes in in vivo studies on different cancer types, so clinical trials are going on for these inhibitors. This review mainly focuses on certain ubiquitin-proteasome enzymes involved in developing cancers and certain enzymes that can be targeted to treat cancer.
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Affiliation(s)
- Anmol Sharma
- Chitkara College of Pharmacy, Chitkara University, Rajpura 140401, India; (A.S.); (H.K.); (A.K.G.)
| | - Heena Khan
- Chitkara College of Pharmacy, Chitkara University, Rajpura 140401, India; (A.S.); (H.K.); (A.K.G.)
| | - Thakur Gurjeet Singh
- Chitkara College of Pharmacy, Chitkara University, Rajpura 140401, India; (A.S.); (H.K.); (A.K.G.)
- Correspondence: or (T.G.S.); (M.M.A.-D.); Tel.: +91-9815951171 (T.G.S.); +966-580192142 (M.M.A.-D.)
| | - Amarjot Kaur Grewal
- Chitkara College of Pharmacy, Chitkara University, Rajpura 140401, India; (A.S.); (H.K.); (A.K.G.)
| | - Agnieszka Najda
- Department of Vegetable Crops and Medicinal Plants, University of Life Sciences in Lublin, 50A Doświadczalna Street, 20-280 Lublin, Poland; (A.N.); (M.K.-R.)
| | - Małgorzata Kawecka-Radomska
- Department of Vegetable Crops and Medicinal Plants, University of Life Sciences in Lublin, 50A Doświadczalna Street, 20-280 Lublin, Poland; (A.N.); (M.K.-R.)
| | - Mohamed Kamel
- Department of Medicine and Infectious Diseases, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt;
| | - Ahmed E. Altyar
- Department of Pharmacy Practice, Faculty of Pharmacy, King Abdulaziz University, P.O. Box 80260, Jeddah 21589, Saudi Arabia;
| | - Mohamed M. Abdel-Daim
- Department of Pharmaceutical Sciences, Pharmacy Program, Batterjee Medical College, P.O. Box 6231, Jeddah 21442, Saudi Arabia
- Pharmacology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia 41522, Egypt
- Correspondence: or (T.G.S.); (M.M.A.-D.); Tel.: +91-9815951171 (T.G.S.); +966-580192142 (M.M.A.-D.)
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16
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Zhao J, Duan Q, Dong C, Cui J. Cul4a attenuates LPS-induced acute kidney injury via blocking NF-κB signaling pathway in sepsis. J Med Biochem 2021; 41:62-70. [PMID: 35611245 PMCID: PMC9069243 DOI: 10.5937/jomb0-33096] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 07/29/2021] [Indexed: 11/24/2022] Open
Abstract
Background Acute kidney injury (AKI) is a common disease that can develop into end-stage kidney disease. Sepsis is one of the main causes of AKI. Currently, there is no satisfactory way to treat septic AKI. Therefore, we have shown the protective function of Cul4a in septic AKI and its molecular mechanism. Methods The cellular and animal models of septic AKI were established by using lipopolysaccharide (LPS). Western blot (WB) was employed to analyze Cul4a expression. RT-qPCR was employed to test the expression of Cul4a, SOD1, SOD2, GPX1, CAT, IL-6, TNF-a, Bcl-2, IL1b, Bax and KIM-1 mRNA. ELISA was performed to detect the contents of inflammatory factors and LDH. CCK-8 was utilized to detect cell viability. Flow cytometry was utilized to analyze the apoptosis. DHE-ROS kit was used to detect the content of ROS. Results Cul4a was down-regulated in cellular and animal models of septic AKI. Oxidative stress is obviously induced by LPS, as well as apoptosis and inflammation. However, these can be significantly inhibited by up-regulating Cul4a. Moreover, LPS induced the activation of the NF-kB pathway, which could also be inhibited by overexpression of Cul4a. Conclusions Cul4awas found to be a protective factor in septic AKI, which could inhibit LPS-induced oxidative stress, apoptosis and inflammation of HK-2 cells by inhibiting the NF-kB pathway.
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Affiliation(s)
- Jing Zhao
- Yantaishan Hospital, Department of Critical Care Medicine, Yantai, China
| | - Qiuxia Duan
- The Third People's Hospital of Qingdao, Department of Critical Care Medicine, Qingdao, China
| | - Cuihong Dong
- Shandong College of Traditional Chinese Medicine, Yantai, China
| | - Jing Cui
- The Third People's Hospital of Qingdao, Department of Emergency, Qingdao, China
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17
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Siswanto FM, Oguro A, Imaoka S. Sp1 is a substrate of Keap1 and regulates the activity of CRL4A WDR23 ubiquitin ligase toward Nrf2. J Biol Chem 2021; 296:100704. [PMID: 33895141 DOI: 10.1016/j.jbc.2021.100704] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 04/14/2021] [Accepted: 04/21/2021] [Indexed: 01/06/2023] Open
Abstract
Nuclear factor erythroid 2–related factor 2 (Nrf2) is a critical transcription factor that orchestrates cellular responses to oxidative stress. Because the dysregulation of Nrf2 has been implicated in many diseases, precise regulation of its protein level is crucial for maintaining homeostasis. Kelch-like-ECH-associated protein 1 (Keap1) and WD40 repeat protein 23 (WDR23) directly regulate Nrf2 levels via similar but distinct proteasome-dependent pathways. WDR23 forms a part of the WDR23-Cullin 4A-RING ubiquitin ligase complex (CRL4AWDR23), whereas Keap1 serves as a substrate adaptor for the Cullin 3–containing ubiquitin ligase complex. However, the mechanisms underlying crosstalk between these Keap1 and WDR23 pathways for the regulation of Nrf2 levels have not been investigated. Here, we showed that knockdown (KD) of Keap1 upregulated the expression of Cullin4A (CUL4A) in a specificity protein 1 (Sp1)–dependent manner. We also revealed that Sp1 interacted with Keap1, leading to ubiquitination of Sp1. Increases in Sp1 by Keap1 KD triggered Sp1 binding to the fourth Sp1 binding site (Sp1_M4) within the −230/+50 region of the CUL4A gene. We also demonstrated that the overexpression and KD of Sp1 reduced and increased Nrf2 protein levels, respectively. These effects were abrogated by the WDR23 KD, suggesting that Sp1 also regulates Nrf2 levels via the ubiquitin ligase complex CRL4AWDR23. In conclusion, we discovered Sp1 as a novel substrate of Keap1 and provided evidence that Sp1 regulates the expression of CUL4A. We revealed a novel role for Sp1 in mediating crosstalk between two independent regulators of Nrf2 protein levels.
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18
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Weng SW, Liu TT, Eng HL, You HL, Huang WT. Autophagy Plays a Role in the CUL4A-Related Poor Prognosis of Intrahepatic Cholangiocarcinoma. Pathol Oncol Res 2021; 27:602714. [PMID: 34257560 PMCID: PMC8262180 DOI: 10.3389/pore.2021.602714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 01/22/2021] [Indexed: 11/13/2022]
Abstract
CUL4A regulate the termination of autophagy in a physical process. However, the relationship between CUL4A and autophagy in cancer is unclear. We retrospectively investigated 99 intrahepatic cholangiocarcinoma (iCCA) cases. Whole sections were used for immunohistochemical analysis for p62, and LC3B expression. Q-score was defined as the sum of the labeling intensity and proportion. The cut-off point for immunoreactivity was set. CUL4A was overexpressed in cell lines and autophagy reflux was compared after manipulation. The iCCA cases with CUL4A overexpression had significantly higher prevalence of intact activated autophagy (42.4 vs. 15.2%; p = 0.003), which was significantly associated with advance tumor stage (34.1% vs. 15.4%; p = 0.032), less extensive necrosis (8.3 vs. 49.3%; p < 0.001), and shortened disease-free survival (mean, 19.6 vs. 65.5 months, p = 0.015). In vitro, iCCA cells with CUL4A overexpression significantly increased LC3II level as compared to the cells under basal condition. Although both cell types showed intact autophagy with increased LC3II expression after bafilomycin A1 treatment, the accumulation of LC3II was higher in CUL4A-overexpressing cells. CUL4A overexpression increased the proliferation of cells as compared with control cells. After treatment with bafilomycin A1, proliferation was inhibited in both cell types, but the effects were more prominent in the cells overexpressing CUL4A. CUL4A promotes autophagy, and exhibits significantly higher autophagic flux which affects the proliferation of iCCA cells; these effects correlated with advance tumor stage and poor prognosis. Thus, targeting autophagy may be potentially therapeutic in iCCA.
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Affiliation(s)
- Shao-Wen Weng
- Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Ting-Ting Liu
- Department of Pathology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan.,Department of Medical Laboratory Science, I-Shou University, Kaohsiung, Taiwan
| | - Hock-Liew Eng
- Department of Pathology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Huey-Ling You
- Department of Laboratory Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan.,Department of Medical Laboratory Sciences and Biotechnology, Fooyin University, Kaohsiung, Taiwan
| | - Wan-Ting Huang
- Department of Pathology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan.,Department of Laboratory Medicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan.,Department of Medical Laboratory Sciences and Biotechnology, Fooyin University, Kaohsiung, Taiwan
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19
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Williams CAC, Soufi A, Pollard SM. Post-translational modification of SOX family proteins: Key biochemical targets in cancer? Semin Cancer Biol 2020; 67:30-38. [PMID: 31539559 PMCID: PMC7703692 DOI: 10.1016/j.semcancer.2019.09.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 08/23/2019] [Accepted: 09/15/2019] [Indexed: 12/15/2022]
Abstract
Sox proteins are a family of lineage-associated transcription factors. They regulate expression of genes involved in control of self-renewal and multipotency in both developmental and adult stem cells. Overexpression of Sox proteins is frequently observed in many different human cancers. Despite their importance as therapeutic targets, Sox proteins are difficult to 'drug' using structure-based design. However, Sox protein localisation, activity and interaction partners are regulated by a plethora of post-translational modifications (PTMs), such as: phosphorylation, acetylation, sumoylation, methylation, and ubiquitylation. Here we review the various reported post-translational modifications of Sox proteins and their potential functional importance in guiding cell fate processes. The enzymes that regulate these PTMs could be useful targets for anti-cancer drug discovery.
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Affiliation(s)
- Charles A C Williams
- MRC Centre for Regenerative Medicine, University of Edinburgh, 5 Little France Drive, EH16 4UU, Edinburgh, United Kingdom
| | - Abdenour Soufi
- MRC Centre for Regenerative Medicine, University of Edinburgh, 5 Little France Drive, EH16 4UU, Edinburgh, United Kingdom
| | - Steven M Pollard
- MRC Centre for Regenerative Medicine, University of Edinburgh, 5 Little France Drive, EH16 4UU, Edinburgh, United Kingdom.
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20
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Meerang M, Kreienbühl J, Orlowski V, Müller SLC, Kirschner MB, Opitz I. Importance of Cullin4 Ubiquitin Ligase in Malignant Pleural Mesothelioma. Cancers (Basel) 2020; 12:cancers12113460. [PMID: 33233664 PMCID: PMC7699720 DOI: 10.3390/cancers12113460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/04/2020] [Accepted: 11/17/2020] [Indexed: 12/26/2022] Open
Abstract
Neurofibromatosis type 2 (NF2), the tumor suppressor frequently lost in malignant pleural mesothelioma (MPM), suppresses tumorigenesis in part by inhibiting the Cullin4 ubiquitin ligase (CUL4) complex in the nucleus. Here, we evaluated the importance of CUL4 in MPM progression and tested the efficacy of cullin inhibition by pevonedistat, a small molecule inhibiting cullin neddylation. CUL4 paralogs (CUL4A and CUL4B) were upregulated in MPM tumor specimens compared to nonmalignant pleural tissues. High gene and protein expressions of CUL4B was associated with a worse progression-free survival of MPM patients. Among 13 MPM cell lines tested, five (38%) were highly sensitive to pevonedistat (half maximal inhibitory concentration of cell survival IC50 < 0.5 µM). This remained true in a 3D spheroid culture. Pevonedistat treatment caused the accumulation of CDT1 and p21 in both sensitive and resistant cell lines. However, the treatment induced S/G2 cell cycle arrest and DNA rereplication predominantly in the sensitive cell lines. In an in vivo mouse model, the pevonedistat treatment significantly prolonged the survival of mice bearing both sensitive and resistant MPM tumors. Pevonedistat treatment reduced growth in sensitive tumors but increased apoptosis in resistant tumors. The mechanism in the resistant tumor model may be mediated by reduced macrophage infiltration, resulting from the suppression of macrophage chemotactic cytokines, C-C motif chemokine ligand 2 (CCL2), expression in tumor cells.
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21
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Wang X, Chen T. CUL4A regulates endometrial cancer cell proliferation, invasion and migration by interacting with CSN6. Mol Med Rep 2020; 23:23. [PMID: 33179082 PMCID: PMC7673334 DOI: 10.3892/mmr.2020.11661] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 10/09/2020] [Indexed: 12/18/2022] Open
Abstract
Endometrial cancer (EC) is a common malignant gynecological tumor arising from the endometrium, with an annually increasing morbidity and mortality. The present study aimed to investigate the functions of cullin 4A (CUL4A) in EC, as well as the underlying mechanisms. CUL4A expression was assessed in several human EC cells and normal human endometrial epithelial cells (hEECs) via reverse transcription‑quantitative polymerase chain reaction and western blotting. Subsequently, short hairpin (sh)RNA‑CULA4 was transfected into cells, and cell proliferation, invasion and migration were detected using Cell Counting kit‑8, Transwell and wound healing assays, respectively. The STRING database identified that CSN6 interacted with CULA4, and immunoprecipitation was performed to verify the interaction. Subsequently, following CUL4A knockdown, pcDNA3.1‑CSN6 was transfected into cells and its effects on cell proliferation, invasion and migration were assessed. The expression levels of matrix metallopeptidase (MMP)2, MMP9 and p53 were evaluated via western blotting. The results indicated that CUL4A was highly expressed in EC cells, compared with hEECs. CULA4‑knockdown notably inhibited EC cell proliferation, invasion and migration. The expression levels of MMP2 and MMP9 were significantly decreased, while p53 expression was enhanced following CUL4A‑knockdown. The immunoprecipitation assay verified that COP9 signalosome subunit 6 (CSN6) interacted with CULA4. Furthermore, CSN6‑overexpression alleviated the inhibitory effects of CUL4A‑knockdown on EC cell proliferation, invasion and migration. Similarly, CSN6 overexpression reversed CUL4A‑knockdown‑mediated effects on the expression of MMP2, MMP9 and p53. In summary, the results demonstrated that CUL4A regulated EC cell proliferation, invasion and migration by interacting with CSN6.
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Affiliation(s)
- Xiangrong Wang
- Nursing Department, Jiangsu Union Technical Institute Nantong Health Branch, Nantong, Jiangsu 226010, P.R. China
| | - Tianquan Chen
- Department of Gynecology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, Jiangsu 225000, P.R. China
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Blondelle J, Biju A, Lange S. The Role of Cullin-RING Ligases in Striated Muscle Development, Function, and Disease. Int J Mol Sci 2020; 21:E7936. [PMID: 33114658 PMCID: PMC7672578 DOI: 10.3390/ijms21217936] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/11/2020] [Accepted: 10/13/2020] [Indexed: 02/07/2023] Open
Abstract
The well-orchestrated turnover of proteins in cross-striated muscles is one of the fundamental processes required for muscle cell function and survival. Dysfunction of the intricate protein degradation machinery is often associated with development of cardiac and skeletal muscle myopathies. Most muscle proteins are degraded by the ubiquitin-proteasome system (UPS). The UPS involves a number of enzymes, including E3-ligases, which tightly control which protein substrates are marked for degradation by the proteasome. Recent data reveal that E3-ligases of the cullin family play more diverse and crucial roles in cross striated muscles than previously anticipated. This review highlights some of the findings on the multifaceted functions of cullin-RING E3-ligases, their substrate adapters, muscle protein substrates, and regulatory proteins, such as the Cop9 signalosome, for the development of cross striated muscles, and their roles in the etiology of myopathies.
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Affiliation(s)
- Jordan Blondelle
- Department of Medicine, University of California, La Jolla, CA 92093, USA
| | - Andrea Biju
- Department of Medicine, University of California, La Jolla, CA 92093, USA
| | - Stephan Lange
- Department of Medicine, University of California, La Jolla, CA 92093, USA
- Department of Molecular and Clinical Medicine, University of Gothenburg, 41345 Gothenburg, Sweden
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Mittenbühler MJ, Saedler K, Nolte H, Kern L, Zhou J, Qian SB, Meder L, Ullrich RT, Brüning JC, Wunderlich FT. Hepatic FTO is dispensable for the regulation of metabolism but counteracts HCC development in vivo. Mol Metab 2020; 42:101085. [PMID: 32956847 DOI: 10.1016/j.molmet.2020.101085] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 09/15/2020] [Accepted: 09/16/2020] [Indexed: 12/21/2022] Open
Abstract
Objective Single-nucleotide polymorphisms in the FTO gene encoding an m6Am and an m6A demethylase are associated with obesity. Moreover, recent studies have linked a dysregulation of m6A modifications and its machinery, including FTO, to the development of several forms of cancers. However, the functional role of hepatic FTO in metabolism and the development and progression of hepatocellular carcinoma (HCC), a proteotypic obesity-associated cancer, remains unclear. Thus, we aimed to reveal the role of hepatic FTO in metabolism and in the initiation and progression of HCC in vivo. Methods We generated mice with hepatic FTO deficiency (FTOL−KO). The effect of hepatic FTO on metabolism was investigated by extensive metabolic phenotyping. To determine the impact of hepatic FTO on HCC development, FTOL−KO and Ctrl mice were subjected to long-term diethylnitrosamine (DEN)-induced HCC-development and the tumor initiation phase was examined via a short-term DEN protocol. Results In long-term DEN experiments, FTOL−KO mice exhibit increased HCC burden compared to Ctrl mice. In the tumor initiation phase, Ctrl mice display a dynamic regulation of FTO upon induction of liver damage, while this response is abrogated in FTO-deficient mice. Proteomic analyses revealed that liver damage-induced increases in FTO expression reduce CUL4A protein abundance. Functionally, simultaneous knockdown of Cul4a reverses the increased hepatocyte proliferation observed upon loss of FTO. Conclusion Collectively, our study demonstrates that hepatic FTO is dispensable for the control of energy homeostasis and glucose metabolism. However, we show a protective function of FTO in liver carcinogenesis and suggest the FTO-dependent dynamic mRNA demethylation of Cul4a in the initiation of HCC development contributes to this effect. Hepatic FTO is dispensable for whole body metabolism. FTO is dynamically regulated upon acute liver damage and controls proliferation. Hepatic FTO function protects against the development of hepatocellular carcinoma (HCC). Cul4a is a downstream target of FTO, and Cul4a knockdown reduces damage-induced proliferation in FTOL−KO livers.
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Minor MM, Hollinger FB, McNees AL, Jung SY, Jain A, Hyser JM, Bissig KD, Slagle BL. Hepatitis B Virus HBx Protein Mediates the Degradation of Host Restriction Factors through the Cullin 4 DDB1 E3 Ubiquitin Ligase Complex. Cells 2020; 9:E834. [PMID: 32235678 PMCID: PMC7226812 DOI: 10.3390/cells9040834] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 03/24/2020] [Accepted: 03/25/2020] [Indexed: 02/06/2023] Open
Abstract
The hepatitis B virus (HBV) regulatory HBx protein is required for infection, and its binding to cellular damaged DNA binding protein 1 (DDB1) is critical for this function. DDB1 is an adaptor protein for the cullin 4A Really Interesting New Gene (RING) E3 ubiquitin ligase (CRL4) complex and functions by binding cellular DDB1 cullin associated factor (DCAF) receptor proteins that recruit substrates for ubiquitination and degradation. We compared the proteins found in the CRL4 complex immunoprecipitated from uninfected versus HBV-infected hepatocytes from human liver chimeric mice for insight into mechanisms by which HBV and the cell interact within the CRL4 complex. Consistent with its role as a viral DCAF, HBx was found in the HBV CRL4 complexes. In tissue culture transfection experiments, we showed that HBx expression led to decreased levels of known restriction factor structural maintenance of chromosomes protein 6 (SMC6) and putative restriction factors stromal interaction molecule 1 (STIM1, zinc finger E-box binding homeobox 2 (ZEB2), and proteasome activator subunit 4 (PSME4). Moreover, silencing of these proteins led to increased HBV replication in the HepG2-sodium taurocholate cotransporting polypeptide (NTCP) infection model. We also identified cellular DCAF receptors in CRL4 complexes from humanized mice. Increasing amounts of HBx did not reveal competitive DCAF binding to cullin4 (CUL4)-DDB1 in plasmid-transfected cells. Our results suggest a model in which HBx benefits virus replication by directly or indirectly degrading multiple cellular restriction factors.
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Affiliation(s)
- Marissa M. Minor
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA; (M.M.M.); (F.B.H.); (A.L.M.); (J.M.H.)
| | - F. Blaine Hollinger
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA; (M.M.M.); (F.B.H.); (A.L.M.); (J.M.H.)
| | - Adrienne L. McNees
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA; (M.M.M.); (F.B.H.); (A.L.M.); (J.M.H.)
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA;
| | - Sung Yun Jung
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA;
- Department of Biochemistry, Baylor College of Medicine, Houston, TX 77030, USA
| | - Antrix Jain
- Mass Spectrometry Proteomics Core, Baylor College of Medicine, Houston, TX 77030, USA;
| | - Joseph M. Hyser
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA; (M.M.M.); (F.B.H.); (A.L.M.); (J.M.H.)
| | - Karl-Dimiter Bissig
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston, TX 77030, USA;
| | - Betty L. Slagle
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA; (M.M.M.); (F.B.H.); (A.L.M.); (J.M.H.)
- Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA;
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Lu W, Yang C, He H, Liu H. The CARM1-p300-c-Myc-Max (CPCM) transcriptional complex regulates the expression of CUL4A/4B and affects the stability of CRL4 E3 ligases in colorectal cancer. Int J Biol Sci 2020; 16:1071-1085. [PMID: 32140074 PMCID: PMC7053342 DOI: 10.7150/ijbs.41230] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 01/02/2020] [Indexed: 02/06/2023] Open
Abstract
The transcription factor c-Myc and two cullin family members CUL4A/4B function as oncogenes in colorectal cancer. Our recent publication reveals that c-Myc specifically activates the expression of CUL4A/4B through binding to their promoters. However, the underlying mechanism of how c-Myc actions in this process is still unknown. Using mass spectrometry and immunoprecipitation assays, we identified c-Myc formed a transcriptional complex with its partner Max (Myc-associated factor X), a histone acetyltransferase p300 and a coactivator associated arginine methyltransferase 1 (CARM1) in the present study. Knockdown or overexpression of the components of CARM1-p300-c-Myc-Max (CPCM) complex resulted in a decrease or increase of CUL4A/4B levels, respectively. Individual knockdown or inhibition of CPCM components decreased cell proliferation, colony formation, and cell invasion. Biochemically, knockdown or inhibition of CPCM components decreased their occupancies on the promoters of CUL4A/4B and resulted in their downregulation. Importantly, inhibition of CPCM components also caused a decrease of CRL4 E3 ligase activities and eventually led to an accumulation of ST7 (suppression of tumorigenicity 7), the specific substrate of CRL4 E3 ligases in colorectal cancer. Moreover, the in vivo tumor formation results indicated that knockdown or inhibition of CPCM components significantly decreased the tumor volumes. Together, our results suggest that the CPCM complex mediates explicitly the expression of CUL4A/4B, and thus affects the stability of CRL4 E3 ligases and the ubiquitination of ST7. These results provide more options by targeting the CPCM components to inhibit tumor growth in the therapy of colorectal cancer.
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Affiliation(s)
- Wenzhu Lu
- Department of Integrated Traditional and Western Medicine, West China Hospital of Sichuan University, Chengdu 610041, Sichuan, China
| | - Chunmei Yang
- Department of Integrated Traditional and Western Medicine, Chengdu Shangjinnanfu Hospital/West China Hospital of Sichuan University, Chengdu 610041, Sichuan, China
| | - Hongbo He
- Department of Integrated Traditional and Western Medicine, West China Hospital of Sichuan University, Chengdu 610041, Sichuan, China
| | - Hong Liu
- Department of Integrated Traditional and Western Medicine, West China Hospital of Sichuan University, Chengdu 610041, Sichuan, China
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Huang X, Chen J, Cao W, Yang L, Chen Q, He J, Yi Q, Huang H, Zhang E, Cai Z. The many substrates and functions of NEDD4-1. Cell Death Dis 2019; 10:904. [PMID: 31787758 DOI: 10.1038/s41419-019-2142-8] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 10/24/2019] [Accepted: 11/12/2019] [Indexed: 01/08/2023]
Abstract
Tumorigenesis, tumor growth, and prognosis are highly related to gene alterations and post-translational modifications (PTMs). Ubiquitination is a critical PTM that governs practically all aspects of cellular function. An increasing number of studies show that E3 ubiquitin ligases (E3s) are important enzymes in the process of ubiquitination that primarily determine substrate specificity and thus need to be tightly controlled. Among E3s, neural precursor cell expressed developmentally downregulated 4-1 (NEDD4-1) has been shown to play a critical role in modulating the proliferation, migration, and invasion of cancer cells and the sensitivity of cancer cells to anticancer therapies via regulating multiple substrates. This review discusses some significant discoveries on NEDD4-1 substrates and the signaling pathways in which NEDD4-1 participates. In addition, we introduce the latest potential therapeutic strategies that inhibit or activate NEDD4-1 activity using small molecules. NEDD4-1 likely acts as a novel drug target or diagnostic marker in the battle against cancer.
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Abstract
Cullin 4A (CUL4A) is a protein of E3 ubiquitin ligase with many cellular processes. CUL4A could regulate cell cycle, development, apoptosis, and genome instability. This study aimed to analyze the expression of CUL4A in nasopharyngeal carcinoma (NPC) tissues and the associations of CUL4A expression with prognostic significance. A total of 115 NPC patients were collected to assess the protein expression of CUL4A by immunohistochemistry, so as to analyze the relationships between CUL4A expression and clinicopathological and prognostic parameters. All patients were followed-up until death or 5 years. The results showed that high expression of CUL4A was significantly associated with larger primary tumor size (P = .026), higher nodal status (P = .013), more distant metastasis (P = .020), and higher TNM stage (P = .005). Kaplan-Meier curves showed that patients with higher CUL4A expression had significantly shorter overall survival (OS) and progression-free survival (PFS) (both P < .001). In multivariate Cox analysis, CUL4A is an independent prognostic factor for OS (P = .016; hazard ratio [HR] = 2.770, 95% CI: 1.208-6.351) and PFS (P = .022; HR = 2.311, 95% CI: 1.126-4.743). In conclusion, high expression of CUL4A was associated with advanced disease status of NPC, and might serve as an independent prognostic factor.
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Gilson P, Drouot G, Witz A, Merlin JL, Becuwe P, Harlé A. Emerging Roles of DDB2 in Cancer. Int J Mol Sci 2019; 20:ijms20205168. [PMID: 31635251 PMCID: PMC6834144 DOI: 10.3390/ijms20205168] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 10/12/2019] [Accepted: 10/15/2019] [Indexed: 01/10/2023] Open
Abstract
Damage-specific DNA-binding protein 2 (DDB2) was originally identified as a DNA damage recognition factor that facilitates global genomic nucleotide excision repair (GG-NER) in human cells. DDB2 also contributes to other essential biological processes such as chromatin remodeling, gene transcription, cell cycle regulation, and protein decay. Recently, the potential of DDB2 in the development and progression of various cancers has been described. DDB2 activity occurs at several stages of carcinogenesis including cancer cell proliferation, survival, epithelial to mesenchymal transition, migration and invasion, angiogenesis, and cancer stem cell formation. In this review, we focus on the current state of scientific knowledge regarding DDB2 biological effects in tumor development and the underlying molecular mechanisms. We also provide insights into the clinical consequences of DDB2 activity in cancers.
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Affiliation(s)
- Pauline Gilson
- Institut de Cancérologie de Lorraine, Service de Biopathologie, Université de Lorraine, CNRS UMR 7039 CRAN, 54519 Vandœuvre-lès-Nancy CEDEX, France.
| | - Guillaume Drouot
- Faculté des Sciences et Technologies, Université de Lorraine, CNRS UMR 7039 CRAN, 54506 Vandœuvre-lès-Nancy CEDEX, France.
| | - Andréa Witz
- Institut de Cancérologie de Lorraine, Service de Biopathologie, Université de Lorraine, CNRS UMR 7039 CRAN, 54519 Vandœuvre-lès-Nancy CEDEX, France.
| | - Jean-Louis Merlin
- Institut de Cancérologie de Lorraine, Service de Biopathologie, Université de Lorraine, CNRS UMR 7039 CRAN, 54519 Vandœuvre-lès-Nancy CEDEX, France.
| | - Philippe Becuwe
- Faculté des Sciences et Technologies, Université de Lorraine, CNRS UMR 7039 CRAN, 54506 Vandœuvre-lès-Nancy CEDEX, France.
| | - Alexandre Harlé
- Institut de Cancérologie de Lorraine, Service de Biopathologie, Université de Lorraine, CNRS UMR 7039 CRAN, 54519 Vandœuvre-lès-Nancy CEDEX, France.
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Nakade H, Migita K, Matsumoto S, Wakatsuki K, Kunishige T, Miyao S, Sho M. Overexpression of Cullin4A correlates with a poor prognosis and tumor progression in esophageal squamous cell carcinoma. Int J Clin Oncol 2019; 25:446-455. [PMID: 31535245 DOI: 10.1007/s10147-019-01547-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 09/10/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Cullin4A (CUL4A), which is a component of E3 ubiquitin ligase, is implicated in many cellular events. Although the altered expression of CUL4A has been reported in several human cancers, the role of CUL4A in esophageal cancer remains unknown. METHODS We investigated the CUL4A expression in primary esophageal squamous cell carcinoma (ESCC) tissue specimens from 120 patients by immunohistochemistry and explored its clinical relevance and prognostic value. Furthermore, the effect of the expression of CUL4A on cancer cell proliferation was analyzed in vitro using an siRNA silencing technique. RESULTS The higher expression of CUL4A was significantly associated with a deeper depth of tumor invasion (P < 0.001) and the presence of venous invasion (P = 0.014). The disease-specific survival (DSS) rate in patients with tumors that showed high CUL4A expression levels was significantly lower than that in patients whose tumors showed low CUL4A expression levels (P = 0.001). Importantly, the CUL4A status was identified as an independent prognostic factor for DSS (P = 0.045). Our results suggested that the CUL4A expression has significant prognostic value in ESCC. Furthermore, CUL4A gene silencing significantly inhibited the proliferation of ESCC cells in vitro. In addition, the knockdown of the CUL4A expression induced G1 phase arrest and increased the p21 and p27 protein levels. CONCLUSIONS CUL4A might play an important role in regulating the proliferation of ESCC cells and promoting the development of postoperative recurrence.
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Affiliation(s)
- Hiroshi Nakade
- Department of Surgery, Nara Medical University, 840 Shijo-Cho, Kashihara, Nara, 634-8521, Japan.
| | - Kazuhiro Migita
- Department of Surgery, Nara Medical University, 840 Shijo-Cho, Kashihara, Nara, 634-8521, Japan
| | - Sohei Matsumoto
- Department of Surgery, Nara Medical University, 840 Shijo-Cho, Kashihara, Nara, 634-8521, Japan
| | - Kohei Wakatsuki
- Department of Surgery, Nara Medical University, 840 Shijo-Cho, Kashihara, Nara, 634-8521, Japan
| | - Tomohiro Kunishige
- Department of Surgery, Nara Medical University, 840 Shijo-Cho, Kashihara, Nara, 634-8521, Japan
| | - Shintaro Miyao
- Department of Surgery, Nara Medical University, 840 Shijo-Cho, Kashihara, Nara, 634-8521, Japan
| | - Masayuki Sho
- Department of Surgery, Nara Medical University, 840 Shijo-Cho, Kashihara, Nara, 634-8521, Japan
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Spatola BN, Lo JY, Wang B, Curran SP. Nuclear and cytoplasmic WDR-23 isoforms mediate differential effects on GEN-1 and SKN-1 substrates. Sci Rep 2019; 9:11783. [PMID: 31409866 DOI: 10.1038/s41598-019-48286-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 08/01/2019] [Indexed: 01/14/2023] Open
Abstract
Maintaining a healthy cellular environment requires the constant control of proteostasis. E3 ubiquitin ligase complexes facilitate the post-translational addition of ubiquitin, which based on the quantity and specific lysine linkages, results in different outcomes. Our studies reveal the CUL4-DDB1 substrate receptor, WDR23, as both a positive and a negative regulator in cellular stress responses. These opposing roles are mediated by two distinct isoforms: WDR-23A in the cytoplasm and WDR-23B in the nucleus. C. elegans expressing only WDR-23A display activation of SKN-1 and enhanced survival to oxidative stress, whereas animals with restricted WDR-23B expression do not. Additionally, we identify GEN-1, a Holliday junction resolvase, as an evolutionarily conserved WDR-23 substrate and find that the nuclear and cytoplasmic isoforms of WDR-23 differentially affect double-strand break repair. Our results suggest that through differential ubiquitination, nuclear WDR-23B inhibits the activity of substrates, most likely by promoting protein turnover, while cytoplasmic WDR-23A performs a proteasome-independent role. Together, our results establish a cooperative role between two spatially distinct isoforms of WDR-23 in ensuring proper regulation of WDR-23 substrates.
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Abstract
Cullin proteins couple with RING-finger proteins, adaptor proteins and substrate recognition receptors to form E3 ubiquitin ligases for recognizing numerous substrates and participating in a variety of cellular processes, especially in genome stability and tumorigenesis. However, the prognostic values of Cullins in breast cancer remain elusive.A "Kaplan-Meier plotter" (KM plotter) online survival analysis tool was used to evaluate the association of individual Cullin members' mRNA expression with overall survival (OS) in breast cancer patients.Our results revealed that elevated mRNA expression of CUL4A and PARC were significantly associated with poor OS for breast cancer patients. While high mRNA expression of CUL2, CUL4B, and CUL5 were correlated with better survival for breast cancers.The associated results suggested that some Cullin members could serve as new predictive prognostic indicators for breast cancer.
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Affiliation(s)
- Aiyu Liu
- Department of Anesthesiology, First Affiliated Hospital, Zhejiang University School of Medicine
| | - Shizhen Zhang
- Institute of Translational Medicine, Zhejiang University School of Medicine
| | - Yanwen Shen
- Institute of Translational Medicine, Zhejiang University School of Medicine
| | - Rui Lei
- Department of Plastic Surgery, First Affiliated Hospital, Zhejiang University School of Medicine
| | - Yannan Wang
- Department of Scientific Research, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, China
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Feng P, Zhang W, Chu Y, Li J, Yang J. Inhibition of CLU4A exhibits a cardioprotective role in hypoxia/reoxygenation-induced injury by an ERK-dependent pathway. Int J Clin Exp Pathol 2019; 12:2157-2165. [PMID: 31934038 PMCID: PMC6949645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 04/19/2019] [Indexed: 06/10/2023]
Abstract
CLU4A is identified as a proto-oncogene in various human cancers. CLU4A was reported to be up-regulated in myocardial ischemia/reperfusion injury, but the precise role of CLU4A played in myocardial ischemia/reperfusion injury remains unknown; and the underlying mechanism of CLU4A in myocardial ischemia/reperfusion injury needs to be investigated. CLU4A expression was measured after myocardial ischemia/reperfusion in mice and in H9C2 cells with hypoxia/reoxygenation treatment by q-PCR and western blotting. The cardioprotective effect of CLU4A inhibition was detected by monitoring the cell viability, cell apoptosis, and LDH activity in vitro and in vivo, and examining the infarct size and cardiac function in vivo. The molecular mechanism was further determined by examining the effects of PD98059, a specific inhibitor of the ERK signaling pathways in H9C2 cells with hypoxia/reoxygenation treatment. CLU4A expression was up-regulated after myocardial ischemia/reperfusion in mice and in H9C2 cells with hypoxia/reoxygenation treatment. Inhibition of CLU4A improved the cell viability, restrained the cell apoptosis, and suppressed LDH activity in vitro. Consistently, knockdown of CLU4A reduced the myocardial infarct size and improved cardiac function in vivo. si-CLU4A treatment increased phosphorylated ERK (p-ERK) in vitro, but the protection role of si-CLU4A was abolished by the ERK inhibitor, PD98059. In conclusion, CLU4A expression was up-regulated in myocardial ischemia/reperfusion. Inhibition of CLU4A exhibited a cardioprotective role by an ERK-dependent pathway.
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Affiliation(s)
- Pin Feng
- Department of Cardiology, The Second Affiliated Hospital of Air Force Medical University Xi'an, Shaanxi, P. R. China
| | - Wei Zhang
- Department of Cardiology, The Second Affiliated Hospital of Air Force Medical University Xi'an, Shaanxi, P. R. China
| | - Yi Chu
- Department of Cardiology, The Second Affiliated Hospital of Air Force Medical University Xi'an, Shaanxi, P. R. China
| | - Jun Li
- Department of Cardiology, The Second Affiliated Hospital of Air Force Medical University Xi'an, Shaanxi, P. R. China
| | - Jingxiao Yang
- Department of Cardiology, The Second Affiliated Hospital of Air Force Medical University Xi'an, Shaanxi, P. R. China
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Ye N, Zhang N, Zhang Y, Qian H, Wu B, Sun Y. Cul4a as a New Interaction Protein of PARP1 Inhibits Oxidative Stress-Induced H9c2 Cell Apoptosis. Oxid Med Cell Longev 2019; 2019:4273261. [PMID: 31178959 DOI: 10.1155/2019/4273261] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 03/10/2019] [Indexed: 12/19/2022]
Abstract
Oxidative stress plays a major part in myocardial reperfusion injury. Cul4a is the core protein of CRLs E3 ubiquitin ligase complex; while it is known that Cul4a is responsible for various cancers, its role in cardiac function remains unclear. Hence, we have shown the protective function of Cul4a and its protection mechanism in oxidative stress-induced H9c2 cardiomyocyte apoptosis. Here, oxidative stress was induced by hydrogen peroxide (H2O2), CCK-8 assay and flow cytometry were used to analyze cell viability and apoptosis rate, western blot and immunofluorescence were used to quantitatively analyze the expression of protein, ROS fluorescence kit was used to detect reactive oxygen species (ROS) formation, and coimmunoprecipitation was used to identify protein interaction. In the results, it was found that Cul4a was involved in oxidative stress-induced H9c2 cell apoptosis and could inhibit H2O2-induced ROS generation and H9c2 cell apoptosis. Furthermore, we identified that when combining with PARP1, Cul4a could reduce its expression, and the interaction was enhanced under oxidative stress. In conclusion, our results indicate that Cul4a is a new protective factor involved in oxidative stress-induced cardiomyocyte injury and functions by tying and decreasing overactivated PARP1.
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Ashok C, Owais S, Srijyothi L, Selvam M, Ponne S, Baluchamy S. A feedback regulation of CREB activation through the CUL4A and ERK signaling. Med Oncol 2019; 36:20. [PMID: 30666499 DOI: 10.1007/s12032-018-1240-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 12/17/2018] [Indexed: 12/24/2022]
Abstract
CUL4A; an E3 ubiquitin ligase is involved in the degradation of negative regulators of cell cycle such as p21, p27, p53, etc., through polyubiquitination-mediated protein degradation. The functional role(s) of CUL4A proteins on their targets are well characterized; however, the transcriptional regulation of CUL4A, particularly at its promoter level is not yet studied. Therefore, in this study, using computational tools, we found cAMP responsive elements (CRE) at the locations of - 926 and - 764 with respect to transcription state site + 1 of CUL4A promoter. Hence, we investigated the role of CREB on the regulation of CUL4A transcription. Our chromatin immunoprecipitation (ChIP) data clearly showed increased levels of promoter occupancy of both CREB and pCREB on both CREs of CUL4A promoter. As expected, the expression of CUL4A increases and decreases upon the overexpression of and knocking down of CREB, respectively. Moreover, the inhibition of ERK pathway by U0126 not only reduces the CREB activation but also the CUL4A levels suggesting that CREB is the upstream activator of CUL4A transcription. The reduction of CUL4A levels upon the knocking down of CREB or by U0126 treatment increases the protein levels of CUL4A substrates such as p21 and p27. It is reported that CUL4A activates the ERK1/2 transcription and ERK1/2 pathway activates the CREB by phosphorylation. Based on our data and earlier findings, we report that CREB regulates the CUL4A levels positively which in turn activates the CREB through ERK1/2 pathway in the form of auto-regulatory looped mechanism.This suggests that CUL4A might be involved in proliferation of cancer cells by regulating the ERK1/2 and CREB signaling.
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Affiliation(s)
- Cheemala Ashok
- Department of Biotechnology, Pondicherry Central University, Pondicherry, 605014, India
| | - Sheikh Owais
- Department of Biotechnology, Pondicherry Central University, Pondicherry, 605014, India
| | - Loudu Srijyothi
- Department of Biotechnology, Pondicherry Central University, Pondicherry, 605014, India
| | - Murugan Selvam
- Department of Biotechnology, Pondicherry Central University, Pondicherry, 605014, India
| | - Saravanaraman Ponne
- Department of Biotechnology, Pondicherry Central University, Pondicherry, 605014, India
| | - Sudhakar Baluchamy
- Department of Biotechnology, Pondicherry Central University, Pondicherry, 605014, India.
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Wakabayashi K, Machitani M, Tachibana M, Sakurai F, Mizuguchi H. A MicroRNA Derived from Adenovirus Virus-Associated RNAII Promotes Virus Infection via Posttranscriptional Gene Silencing. J Virol 2019; 93:e01265-18. [PMID: 30355689 DOI: 10.1128/JVI.01265-18] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 10/11/2018] [Indexed: 12/18/2022] Open
Abstract
The adenovirus (Ad) serotype 5 genome encodes two noncoding small RNAs (virus-associated RNAs I and II [VA-RNAI and -II]), which are approximately 160-nucleotide (nt) RNAs transcribed by RNA polymerase III. It is well known that VA-RNAI supports Ad infection via the inhibition of double-stranded RNA-dependent protein kinase (PKR), which recognizes double-stranded RNA and acts as an antiviral system. Recent studies revealed that VA-RNAs are processed into VA-RNA-derived microRNAs (miRNAs) (mivaRNAI and -II); however, we and another group recently demonstrated that mivaRNAI does not promote Ad replication. On the other hand, the roles of VA-RNAII and mivaRNAII in Ad replication have remained to be clarified. In this study, we demonstrated mivaRNAII-mediated promotion of Ad replication. Transfection with chemically synthesized 3'-mivaRNAII-138, one of the most abundant forms of mivaRNAII, significantly enhanced Ad replication, while the other species of mivaRNAII did not. We identified 8 putative target genes of 3'-mivaRNAII-138 by microarray analysis and in silico analysis. Among the 8 candidates, knockdown of the cullin 4A (CUL4A) gene, which encodes a component of the ubiquitin ligase complex, most significantly enhanced Ad replication. CUL4A expression was significantly suppressed by 3'-mivaRNAII-138 via posttranscriptional gene silencing, indicating that CUL4A is a target gene of 3'-mivaRNAII-138 and mivaRNAII functions as a viral miRNA promoting Ad infection. It has been reported that CUL4A is involved in degradation of c-Jun, which acts as a transcription factor in the Jun-N-terminal kinase (JNK) signaling cascade. Treatment with JNK inhibitors dramatically suppressed Ad replication, suggesting that mivaRNAII-mediated downregulation of CUL4A enhanced JNK signaling and thereby promoted Ad infection.IMPORTANCE Several types of viruses encode viral miRNAs which regulate host and/or viral gene expression via posttranscriptional gene silencing, leading to efficient viral infection. Adenovirus (Ad) expresses miRNAs derived from VA-RNAs (mivaRNAI and -II); however, recent studies have revealed that processing of VA-RNAI into mivaRNAI inhibits Ad replication. Conversely, we demonstrate here that mivaRNAII significantly promotes Ad replication and that mivaRNAII-mediated suppression of CUL4A expression via posttranscriptional gene silencing induces accumulation of c-Jun, leading to promotion of Ad infection. These results exhibited the significance of VA-RNAII for supporting Ad infection through a mechanism complementary to that of VA-RNAI. These observations could provide important clues toward a new perspective on host-virus interaction. Moreover, Ad is widely used as a basic framework for viral vectors and oncolytic viruses. Our findings will help to regulate Ad infection and will promote the development of novel Ad vectors and oncolytic Ad.
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Lian Y, Yan C, Xu H, Yang J, Yu Y, Zhou J, Shi Y, Ren J, Ji G, Wang K. A Novel lncRNA, LINC00460, Affects Cell Proliferation and Apoptosis by Regulating KLF2 and CUL4A Expression in Colorectal Cancer. Mol Ther Nucleic Acids 2018; 12:684-97. [PMID: 30092404 DOI: 10.1016/j.omtn.2018.06.012] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 06/28/2018] [Accepted: 06/29/2018] [Indexed: 12/18/2022]
Abstract
Emerging evidence has proven that long noncoding RNAs (lncRNAs) play important roles in human colorectal cancer (CRC) biology, although few lncRNAs have been characterized in CRC. Therefore, the functional significance of lncRNAs in the malignant progression of CRC still needs to be further explored. In this study, through analyzing TCGA RNA sequencing data and other publicly available microarray data, we found a novel lncRNA, LINC00460, whose expression was significantly upregulated in CRC tissues compared to adjacent normal tissues. Consistently, real-time qPCR results also verified that LINC00460 was overexpressed in CRC tissues and cells. Furthermore, high LINC00460 expression levels in CRC specimens were correlated with larger tumor size, advanced tumor stage, lymph node metastasis and shorter overall survival. In vitro and in vivo assays of LINC00460 alterations revealed a complex integrated phenotype affecting cell growth and apoptosis. Mechanistically, LINC00460 repressed Krüppel-like factor 2 (KLF2) transcription by binding to enhancer of zeste homolog 2 (EZH2). LINC00460 also functioned as a molecular sponge for miR-149-5p, antagonizing its ability to repress cullin 4A (CUL4A) protein translation. Taken together, our findings support a model in which the LINC00460/EZH2/KLF2 and LINC00460/miR-149-5p/CUL4A crosstalk serve as critical effectors in CRC tumorigenesis and progression, suggesting new therapeutic directions in CRC.
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Chen G, Zhao X, Tan Z, Wang D, Luo D, Zhang P, Cao J, Wang F, Liu Q, Li L. Investigation of the role of cullin 4A overexpression in human liver cancer. Mol Med Rep 2018; 18:2531-2540. [PMID: 30015884 PMCID: PMC6102737 DOI: 10.3892/mmr.2018.9233] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 01/09/2018] [Indexed: 01/15/2023] Open
Abstract
Cullin 4A (CUL4A) is the major component of cullin‑RING‑based E3 ubiquitin‑protein ligase complexes, which regulate the ubiquitination of target proteins. The overexpression of CUL4A has been associated with the development and progression of various cancer types. However, a detailed understanding of the role of CUL4A in human liver cancer has not been determined by previous studies. In the present study, the association between human liver cancer and CUL4A expression was investigated. The expression of CUL4A in liver cancer tissues and paracancerous tissues of patients was investigated by reverse transcription‑quantitative polymerase chain reaction, western blotting and immunohistochemical staining. Overexpression and knockdown of CUL4A were induced with an overexpression vector and small interfering RNA transfection, respectively, in human liver cancer cell lines, and the effects on cell proliferation were analyzed by a Cell Counting Kit‑8 assay to investigate the role of CUL4A in human liver cancer. Cell migration, invasion, apoptosis and the cell cycle were also analyzed following transfection. The results of the present study revealed that the mRNA and protein expression of CUL4A was increased in the liver cancer tissues compared with the paracancerous tissues of 3 patients. Additionally, the results demonstrated that downregulation of CUL4A expression inhibited cell proliferation, migration and invasion, and increased the percentage of cell apoptosis, in HEPG2 and MHCC97‑H cells, while CUL4A overexpression led to the opposite effects. Therefore, the results of the current study indicated that CUL4A may serve an important role in the development and progression of human liver cancer, and highlights the potential of CUL4A as a novel target in the diagnosis and treatment of human liver cancer and potentially other cancer types.
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Affiliation(s)
- Gang Chen
- Department of Hepatobiliary Surgery, First People's Hospital of Kunming, Kunming, Yunnan 650032, P.R. China
| | - Xiongqi Zhao
- Department of Hepatobiliary Surgery, First People's Hospital of Kunming, Kunming, Yunnan 650032, P.R. China
| | - Zedan Tan
- Department of Hepatobiliary Surgery, First People's Hospital of Kunming, Kunming, Yunnan 650032, P.R. China
| | - Dongdong Wang
- Department of Hepatobiliary Surgery, First People's Hospital of Kunming, Kunming, Yunnan 650032, P.R. China
| | - Ding Luo
- Department of Hepatobiliary Surgery, First People's Hospital of Kunming, Kunming, Yunnan 650032, P.R. China
| | - Peiyao Zhang
- Department of Hepatobiliary Surgery, First People's Hospital of Kunming, Kunming, Yunnan 650032, P.R. China
| | - Jun Cao
- Department of Hepatobiliary Surgery, First People's Hospital of Kunming, Kunming, Yunnan 650032, P.R. China
| | - Fan Wang
- Department of Hepatobiliary Surgery, First People's Hospital of Kunming, Kunming, Yunnan 650032, P.R. China
| | - Qiyu Liu
- Department of Hepatobiliary Surgery, First People's Hospital of Kunming, Kunming, Yunnan 650032, P.R. China
| | - Li Li
- Department of Hepatobiliary Surgery, First People's Hospital of Kunming, Kunming, Yunnan 650032, P.R. China
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Jang SM, Redon CE, Aladjem MI. Chromatin-Bound Cullin-Ring Ligases: Regulatory Roles in DNA Replication and Potential Targeting for Cancer Therapy. Front Mol Biosci 2018; 5:19. [PMID: 29594129 PMCID: PMC5859106 DOI: 10.3389/fmolb.2018.00019] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 02/12/2018] [Indexed: 12/14/2022] Open
Abstract
Cullin-RING (Really Interesting New Gene) E3 ubiquitin ligases (CRLs), the largest family of E3 ubiquitin ligases, are functional multi-subunit complexes including substrate receptors, adaptors, cullin scaffolds, and RING-box proteins. CRLs are responsible for ubiquitination of ~20% of cellular proteins and are involved in diverse biological processes including cell cycle progression, genome stability, and oncogenesis. Not surprisingly, cullins are deregulated in many diseases and instances of cancer. Recent studies have highlighted the importance of CRL-mediated ubiquitination in the regulation of DNA replication/repair, including specific roles in chromatin assembly and disassembly of the replication machinery. The development of novel therapeutics targeting the CRLs that regulate the replication machinery and chromatin in cancer is now an attractive therapeutic strategy. In this review, we summarize the structure and assembly of CRLs and outline their cellular functions and their diverse roles in cancer, emphasizing the regulatory functions of nuclear CRLs in modulating the DNA replication machinery. Finally, we discuss the current strategies for targeting CRLs against cancer in the clinic.
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Affiliation(s)
- Sang-Min Jang
- Developmental Therapeutics Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, United States
| | - Christophe E Redon
- Developmental Therapeutics Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, United States
| | - Mirit I Aladjem
- Developmental Therapeutics Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, United States
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Zhang C, Chen B, Jiang K, Lao L, Shen H, Chen Z. Activation of TNF-α/NF-κB axis enhances CRL4B DCAF11 E3 ligase activity and regulates cell cycle progression in human osteosarcoma cells. Mol Oncol 2018; 12:476-494. [PMID: 29377600 PMCID: PMC5891038 DOI: 10.1002/1878-0261.12176] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 10/30/2017] [Accepted: 11/20/2017] [Indexed: 12/16/2022] Open
Abstract
Cullin 4B, a member of the Cullins, which serve as scaffolds to facilitate the assembly of E3 ligase complexes, is aberrantly expressed in many cancers, including osteosarcoma. Recently, we observed that CUL4B forms the CRL4BDCAF11 E3 ligase, which specifically ubiquitinates and degrades the cyclin‐dependent kinase (CDK) inhibitor p21Cip1 in human osteosarcoma cells. However, the underlying mechanisms regarding the aberrant expression of CUL4B and the upstream members of this signaling pathway are mostly unknown. In this study, we demonstrate that nuclear factor kappaB (NF‐κB) is a direct modulator of CUL4B expression. The CUL4B promoter is responsive to several NF‐κB subunits, including RelA, RelB, and c‐Rel, but not to p50 or p52. Additional studies reveal that the tumor necrosis factor alpha (TNF‐α)/NF‐κB axis pathway is activated in human osteosarcoma cells. This activation causes both CUL4B and NF‐κB subunits to become abundant in the nucleus of human osteosarcoma cells. The down‐regulation of individual genes, including TNFR1, RelA, RelB, c‐Rel, and CUL4B, or pairs of them, including TNFR1 + RelA,TNFR1 + RelB,TNFR1 + c‐Rel, and RelA+CUL4B, has similar effects on cell growth inhibition, colony formation, cell invasion, and in vivo tumor formation, whereas the overexpression of CUL4B in these knockdown cells significantly reverses their phenotypes. The inhibition of the TNF‐α/NF‐κB pathway greatly attenuates CRL4BDCAF11 E3 ligase activity and causes the accumulation of p21Cip1, thereby leading to cell cycle arrest at the S phase. Taken together, our results support a model in which the activation of the TNF‐α/NF‐κB axis contributes to an increase in CRL4BDCAF11 activity and a decrease in p21Cip1 protein levels, thereby controlling cell cycle progression in human osteosarcoma cells.
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Affiliation(s)
- Caiguo Zhang
- Department of Spine Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, China.,Department of Dermatology, University of Colorado, Aurora, CO, USA
| | - Bin Chen
- Department of Spine Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, China
| | - Kaibiao Jiang
- Department of Spine Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, China
| | - Lifeng Lao
- Department of Spine Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, China
| | - Hongxing Shen
- Department of Spine Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, China
| | - Zhi Chen
- Department of Spine Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, China
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Yang L, Chen J, Han X, Zhang E, Huang X, Guo X, Chen Q, Wu W, Zheng G, He D, Zhao Y, Yang Y, He J, Cai Z. Pirh2 mediates the sensitivity of myeloma cells to bortezomib via canonical NF-κB signaling pathway. Protein Cell 2018; 9:770-784. [PMID: 29441489 PMCID: PMC6107487 DOI: 10.1007/s13238-017-0500-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Accepted: 12/08/2017] [Indexed: 12/22/2022] Open
Abstract
Clinical success of the proteasome inhibitor established bortezomib as one of the most effective drugs in treatment of multiple myeloma (MM). While survival benefit of bortezomib generated new treatment strategies, the primary and secondary resistance of MM cells to bortezomib remains a clinical concern. This study aimed to highlight the role of p53-induced RING-H2 (Pirh2) in the acquisition of bortezomib resistance in MM and to clarify the function and mechanism of action of Pirh2 in MM cell growth and resistance, thereby providing the basis for new therapeutic targets for MM. The proteasome inhibitor bortezomib has been established as one of the most effective drugs for treating MM. We demonstrated that bortezomib resistance in MM cells resulted from a reduction in Pirh2 protein levels. Pirh2 overexpression overcame bortezomib resistance and restored the sensitivity of myeloma cells to bortezomib, while a reduction in Pirh2 levels was correlated with bortezomib resistance. The levels of nuclear factor-kappaB (NF-κB) p65, pp65, pIKBa, and IKKa were higher in bortezomib-resistant cells than those in parental cells. Pirh2 overexpression reduced the levels of pIKBa and IKKa, while the knockdown of Pirh2 via short hairpin RNAs increased the expression of NF-κB p65, pIKBa, and IKKa. Therefore, Pirh2 suppressed the canonical NF-κB signaling pathway by inhibiting the phosphorylation and subsequent degradation of IKBa to overcome acquired bortezomib resistance in MM cells.
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Affiliation(s)
- Li Yang
- Multiple Myeloma Treatment Center & Bone Marrow Transplantation Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Jing Chen
- Multiple Myeloma Treatment Center & Bone Marrow Transplantation Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Xiaoyan Han
- Multiple Myeloma Treatment Center & Bone Marrow Transplantation Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Enfan Zhang
- Multiple Myeloma Treatment Center & Bone Marrow Transplantation Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Xi Huang
- Multiple Myeloma Treatment Center & Bone Marrow Transplantation Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Xing Guo
- Multiple Myeloma Treatment Center & Bone Marrow Transplantation Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Qingxiao Chen
- Multiple Myeloma Treatment Center & Bone Marrow Transplantation Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Wenjun Wu
- Multiple Myeloma Treatment Center & Bone Marrow Transplantation Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Gaofeng Zheng
- Multiple Myeloma Treatment Center & Bone Marrow Transplantation Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Donghua He
- Multiple Myeloma Treatment Center & Bone Marrow Transplantation Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Yi Zhao
- Multiple Myeloma Treatment Center & Bone Marrow Transplantation Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Yang Yang
- Multiple Myeloma Treatment Center & Bone Marrow Transplantation Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Jingsong He
- Multiple Myeloma Treatment Center & Bone Marrow Transplantation Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Zhen Cai
- Multiple Myeloma Treatment Center & Bone Marrow Transplantation Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China.
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Yang L, Chen J, Huang X, Zhang E, He J, Cai Z. Novel Insights Into E3 Ubiquitin Ligase in Cancer Chemoresistance. Am J Med Sci 2018; 355:368-76. [PMID: 29661351 DOI: 10.1016/j.amjms.2017.12.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 12/20/2017] [Accepted: 12/23/2017] [Indexed: 12/18/2022]
Abstract
Drug resistance can obstruct successful cancer chemotherapy. The ubiquitin-proteasome pathway has emerged as a crucial player that controls steady-state protein levels regulating multiple biological processes, such as cell cycle, cellular proliferation, apoptosis, and DNA damage response, which are involved in oncogenesis, cancer development, prognosis, and drug resistance. E3 ligases perform the final step in the ubiquitination cascade, and determine which protein becomes ubiquitylated by specifically binding the substrate protein. They are promising drug targets thanks to their ability to regulate protein stability and functions. Although patient survival has increased in recent years with the availability of novel agents, chemoresistance remains a major problem in cancer management. E3 ligases attract increasing attention with advances in chemoresistance knowledge. To explore the role of E3 ligase in cancer chemotherapy resistance and the underlying mechanism, we summarize the growing number of E3 ligases and their substrate proteins, which have emerged as crucial players in cancer chemoresistance and targeted therapies.
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Lu H, Shamanna RA, de Freitas JK, Okur M, Khadka P, Kulikowicz T, Holland PP, Tian J, Croteau DL, Davis AJ, Bohr VA. Cell cycle-dependent phosphorylation regulates RECQL4 pathway choice and ubiquitination in DNA double-strand break repair. Nat Commun 2017; 8:2039. [PMID: 29229926 DOI: 10.1038/s41467-017-02146-3] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 11/08/2017] [Indexed: 12/29/2022] Open
Abstract
Pathway choice within DNA double-strand break (DSB) repair is a tightly regulated process to maintain genome integrity. RECQL4, deficient in Rothmund-Thomson Syndrome, promotes the two major DSB repair pathways, non-homologous end joining (NHEJ) and homologous recombination (HR). Here we report that RECQL4 promotes and coordinates NHEJ and HR in different cell cycle phases. RECQL4 interacts with Ku70 to promote NHEJ in G1 when overall cyclin-dependent kinase (CDK) activity is low. During S/G2 phases, CDK1 and CDK2 (CDK1/2) phosphorylate RECQL4 on serines 89 and 251, enhancing MRE11/RECQL4 interaction and RECQL4 recruitment to DSBs. After phosphorylation, RECQL4 is ubiquitinated by the DDB1-CUL4A E3 ubiquitin ligase, which facilitates its accumulation at DSBs. Phosphorylation of RECQL4 stimulates its helicase activity, promotes DNA end resection, increases HR and cell survival after ionizing radiation, and prevents cellular senescence. Collectively, we propose that RECQL4 modulates the pathway choice of NHEJ and HR in a cell cycle-dependent manner. DNA double-strand break (DSB) repair is a tightly regulated process that can occur via non-homologous end joining (NHEJ) or homologous recombination (HR). Here, the authors investigate how RECQL4 modulates DSB repair pathway choice by differentially regulating NHEJ and HR in a cell cycle-dependent manner.
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Bandi V, Baluchamy S. miR-181a-2 downregulates the E3 ubiquitin ligase CUL4A transcript and promotes cell proliferation. Med Oncol 2017; 34:146. [PMID: 28730334 DOI: 10.1007/s12032-017-1006-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 07/15/2017] [Indexed: 10/25/2022]
Abstract
MiR-181a-2 plays a major role in cell proliferation both positively and negatively depending on tissue type by targeting several regulators 3'UTR regions. We have predicted several targets for miR-181a-2 through computational approaches and characterized one its interesting target, CUL4A, an E3 ubiquitin ligase. CUL4A regulates diverse functions in the cells including DNA repair, DNA replication, cell cycle, genomic stability through polyubiquitination of target proteins. Deregulation of both miR-181a-2 and CUL4A are reported in many cancerous cells, but the functional link between them is unknown. We show that miR-181a-5p binds to 3'UTR of CUL4A and regulates its transcripts levels in HEK293 cells through overexpression studies. In addition, by using MTT and Neutral red assays, we showed that miR-181a-2 overexpression increased the proliferation in HEK293 cells. Moreover, cell cycle analysis using flow cytometer revealed that an increase in S-phase cells upon the overexpression of miR-181a-2. Though several miRNAs are known to downregulate the CUL4A levels, here we show that miR-181a-2 also participates in the downregulation of CUL4A. Taken together, our data demonstrated that miR-181a-2 increases the cell proliferation in HEK293 cells possibly through the downregulation of CUL4A.
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Huang G-, Liu TT, Weng SW, You HL, Wei YC, Chen CH, Eng HL, Huang WT. CUL4A overexpression as an independent adverse prognosticator in intrahepatic cholangiocarcinoma. BMC Cancer 2017; 17:395. [PMID: 28576144 DOI: 10.1186/s12885-017-3389-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 05/25/2017] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND CUL4A has been known for its oncogenic properties in various human cancers. However, its role in intrahepatic cholangiocarcinoma (iCCA) has not been explored. METHODS We retrospectively investigated 105 iCCA cases from a single medical institution. Tissue microarrays were used for immunohistochemical analysis of CUL4A expression. CUL4A expression vectors were introduced in cell lines. Cell migration and invasion assays were used to compare the mobility potential of iCCA cells under basal conditions and after manipulation. Then we evaluated the effects of CUL4A on the cell growth by proliferation assay, and further checked the susceptibility to cisplatin in iCCA cells with or without CUL4A overexpression. RESULTS CUL4A overexpression was detected in 34 cases (32.4%). Patients with CUL4A-overexpressing tumors exhibited shortened disease-free survival (mean, 27.7 versus 90.4 months; P = 0.011). In the multivariate analysis model, CUL4A overexpression was shown to be an independent unfavorable predictor for disease-free survival (P = 0.045). Moreover, stably transfected CUL4A-overexpressing iCCA cell lines displayed an increased mobility potential and enhanced cell growth without impact on susceptibility to cisplatin. CONCLUSIONS Our data demonstrate that overexpression of CUL4A plays an oncogenic role in iCCA and adversely affects disease-free survival. Thus, it may prove to be a powerful prognostic factor and a potential therapeutic target.
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Cheng L, Yang Q, Li C, Dai L, Yang Y, Wang Q, Ding Y, Zhang J, Liu L, Zhang S, Fan P, Hu X, Xiang R, Yu D, Wei Y, Deng H. DDA1, a novel oncogene, promotes lung cancer progression through regulation of cell cycle. J Cell Mol Med 2017; 21:1532-1544. [PMID: 28211159 PMCID: PMC5542901 DOI: 10.1111/jcmm.13084] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 12/07/2016] [Indexed: 02/05/2023] Open
Abstract
Lung cancer is globally widespread and associated with high morbidity and mortality. DDA1 (DET1 and DDB1 associated 1) was first discovered and registered in the GenBank database by our colleagues. DDA1, an evolutionarily conserved gene, might have significant functions. Recent reports have demonstrated that DDA1 is linked to the ubiquitin–proteasome pathway and facilitates the degradation of target proteins. However, the function of DDA1 in lung cancer was previously unknown. This study aimed to investigate whether DDA1 contributes to tumorigenesis and progression of lung cancer. We found that the expression of DDA1 in normal lung cells and tissue was significantly lower than that in lung cancer and was associated with poor prognosis. DDA1 overexpression promoted proliferation of lung tumour cells and facilitated cell cycle progression in vitro and subcutaneous xenograft tumour progression in vivo. Mechanistically, this was associated with the regulation of S phase and cyclins including cyclin D1/D3/E1. These results indicate that DDA1 promotes lung cancer progression, potentially through promoting cyclins and cell cycle progression. Therefore, DDA1 may be a potential novel target for lung cancer treatment, and a biomarker for tumour prognosis.
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Affiliation(s)
- Lin Cheng
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Qianmei Yang
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Can Li
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Lei Dai
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Yang Yang
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Qingnan Wang
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Yu Ding
- Core Facility of West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Junfeng Zhang
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Lei Liu
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Shuang Zhang
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Ping Fan
- Huaxi Biobank, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Xun Hu
- Huaxi Biobank, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Rong Xiang
- Department of Immunology, Nankai University School of Medicine, Tianjin, China
| | - Dechao Yu
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Yuquan Wei
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Hongxin Deng
- State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China
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Liu C, Rohart F, Simpson PT, Khanna KK, Ragan MA, Lê Cao KA. Integrating Multi-omics Data to Dissect Mechanisms of DNA repair Dysregulation in Breast Cancer. Sci Rep 2016; 6:34000. [PMID: 27666291 PMCID: PMC5036051 DOI: 10.1038/srep34000] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Accepted: 09/01/2016] [Indexed: 12/20/2022] Open
Abstract
DNA repair genes and pathways that are transcriptionally dysregulated in cancer provide the first line of evidence for the altered DNA repair status in tumours, and hence have been explored intensively as a source for biomarker discovery. The molecular mechanisms underlying DNA repair dysregulation, however, have not been systematically investigated in any cancer type. In this study, we performed a statistical analysis to dissect the roles of DNA copy number alteration (CNA), DNA methylation (DM) at gene promoter regions and the expression changes of transcription factors (TFs) in the differential expression of individual DNA repair genes in normal versus tumour breast samples. These gene-level results were summarised at pathway level to assess whether different DNA repair pathways are affected in distinct manners. Our results suggest that CNA and expression changes of TFs are major causes of DNA repair dysregulation in breast cancer, and that a subset of the identified TFs may exert global impacts on the dysregulation of multiple repair pathways. Our work hence provides novel insights into DNA repair dysregulation in breast cancer. These insights improve our understanding of the molecular basis of the DNA repair biomarkers identified thus far, and have potential to inform future biomarker discovery.
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Affiliation(s)
- Chao Liu
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4067, Australia
| | - Florian Rohart
- The University of Queensland Diamantina Institute, The University of Queensland, Woolloongabba, QLD 4102, Australia
| | - Peter T Simpson
- UQ Centre for Clinical Research and School of Medicine, The University of Queensland, Herston, QLD 4101, Australia
| | - Kum Kum Khanna
- QIMR-Berghofer Medical Research Institute, Herston, Brisbane, QLD 4006, Australia
| | - Mark A Ragan
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4067, Australia
| | - Kim-Anh Lê Cao
- The University of Queensland Diamantina Institute, The University of Queensland, Woolloongabba, QLD 4102, Australia
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Hung KH, Su ST, Chen CY, Hsu PH, Huang SY, Wu WJ, Chen MJM, Chen HY, Wu PC, Lin FR, Tsai MD, Lin KI. Aiolos collaborates with Blimp-1 to regulate the survival of multiple myeloma cells. Cell Death Differ 2016; 23:1175-84. [PMID: 26823144 PMCID: PMC4946885 DOI: 10.1038/cdd.2015.167] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 11/01/2015] [Accepted: 11/30/2015] [Indexed: 01/16/2023] Open
Abstract
The transcriptional repressor B lymphocyte-induced maturation protein-1 (Blimp-1) has crucial roles in the control of plasma cell differentiation and in maintaining survival of plasma cells. However, how Blimp-1 ensures the survival of plasma cell malignancy, multiple myeloma (MM), has remained elusive. Here we identified Aiolos, an anti-apoptotic transcription factor of MM cells, as a Blimp-1-interacting protein by mass spectrometry. ChIP coupled with DNA microarray was used to profile the global binding of Aiolos and Blimp-1 to endogenous targets in MM cells, which revealed their co-binding to a large number of genes, including apoptosis-related genes. Accordingly, Blimp-1 and Aiolos regulate similar transcriptomes in MM cells. Analysis of the binding motifs for Blimp-1 and Aiolos uncovered a partial motif that was similar across sites for both proteins. Aiolos promotes the binding of Blimp-1 to target genes and thereby enhances Blimp-1-dependent transcriptional repression. Furthermore, treatment with an anti-MM agent, lenalidomide, caused ubiquitination and proteasomal degradation of Blimp-1, leading to the de-repression of a new Blimp-1 direct target, CULLIN 4A (CUL4A), and reduced Aiolos levels. Accordingly, lenalidomide-induced cell death was partially rescued by reintroduction of Blimp-1 or knockdown of CUL4A. Thus, we demonstrated the functional impacts and underlying mechanisms of the interaction between Aiolos and Blimp-1 in maintaining MM cell survival. We also showed that interruption of Blimp-1/Aiolos regulatory pathways contributes to lenalidomide-mediated anti-MM activity.
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Affiliation(s)
- K-H Hung
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
- Institute and Department of Microbiology and Immunology, National Yang-Ming University, Taipei, Taiwan
| | - S-T Su
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - C-Y Chen
- Department of Bio-Industrial Mechatronics Engineering, National Taiwan University, Taipei, Taiwan
| | - P-H Hsu
- Department of Life Science, National Taiwan Ocean University and Institute of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan
| | - S-Y Huang
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - W-J Wu
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - M-J M Chen
- Genome and Systems Biology Degree Program, National Taiwan University and Academia Sinica, Taipei, Taiwan
| | - H-Y Chen
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - P-C Wu
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, Taiwan
| | - F-R Lin
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
| | - M-D Tsai
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - K-I Lin
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
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Djakbarova U, Marzluff WF, Köseoğlu MM. DDB1 and CUL4 associated factor 11 (DCAF11) mediates degradation of Stem-loop binding protein at the end of S phase. Cell Cycle 2016; 15:1986-96. [PMID: 27254819 DOI: 10.1080/15384101.2016.1191708] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
In eukaryotes, bulk histone expression occurs in the S phase of the cell cycle. This highly conserved system is crucial for genomic stability and proper gene expression. In metazoans, Stem-loop binding protein (SLBP), which binds to 3' ends of canonical histone mRNAs, is a key factor in histone biosynthesis. SLBP is mainly expressed in S phase and this is a major mechanism to limit bulk histone production to the S phase. At the end of S phase, SLBP is rapidly degraded by proteasome, depending on two phosphorylations on Thr 60 and Thr 61. Previously, we showed that SLBP fragment (aa 51-108) fused to GST, is sufficient to mimic the late S phase (S/G2) degradation of SLBP. Here, using this fusion protein as bait, we performed pull-down experiments and found that DCAF11, which is a substrate receptor of CRL4 complexes, binds to the phosphorylated SLBP fragment. We further confirmed the interaction of full-length SLBP with DCAF11 and Cul4A by co-immunoprecipitation experiments. We also showed that DCAF11 cannot bind to the Thr61/Ala mutant SLBP, which is not degraded at the end of S phase. Using ectopic expression and siRNA experiments, we demonstrated that SLBP expression is inversely correlated with DCAF11 levels, consistent with the model that DCAF11 mediates SLBP degradation. Finally, we found that ectopic expression of the S/G2 stable mutant SLBP (Thr61/Ala) is significantly more toxic to the cells, in comparison to wild type SLBP. Overall, we concluded that CRL4-DCAF11 mediates the degradation of SLBP at the end of S phase and this degradation is essential for the viability of cells.
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Affiliation(s)
- Umidahan Djakbarova
- a Department of Genetics and Bioengineering , Fatih University , Istanbul , Turkey.,b Bionanotechnology Center , Fatih University , Istanbul , Turkey
| | - William F Marzluff
- c Department of Biochemistry and Biophysics , University of North Carolina at Chapel Hill , Chapel Hill , NC , USA.,d Program in Molecular Biology and Biotechnology , University of North Carolina at Chapel Hill , Chapel Hill , NC , USA
| | - M Murat Köseoğlu
- a Department of Genetics and Bioengineering , Fatih University , Istanbul , Turkey.,b Bionanotechnology Center , Fatih University , Istanbul , Turkey
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Pfefferle AD, Agrawal YN, Koboldt DC, Kanchi KL, Herschkowitz JI, Mardis ER, Rosen JM, Perou CM. Genomic profiling of murine mammary tumors identifies potential personalized drug targets for p53-deficient mammary cancers. Dis Model Mech 2016; 9:749-57. [PMID: 27149990 PMCID: PMC4958311 DOI: 10.1242/dmm.025239] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2016] [Accepted: 04/27/2016] [Indexed: 12/15/2022] Open
Abstract
Targeted therapies against basal-like breast tumors, which are typically 'triple-negative breast cancers (TNBCs)', remain an important unmet clinical need. Somatic TP53 mutations are the most common genetic event in basal-like breast tumors and TNBC. To identify additional drivers and possible drug targets of this subtype, a comparative study between human and murine tumors was performed by utilizing a murine Trp53-null mammary transplant tumor model. We show that two subsets of murine Trp53-null mammary transplant tumors resemble aspects of the human basal-like subtype. DNA-microarray, whole-genome and exome-based sequencing approaches were used to interrogate the secondary genetic aberrations of these tumors, which were then compared to human basal-like tumors to identify conserved somatic genetic features. DNA copy-number variation produced the largest number of conserved candidate personalized drug targets. These candidates were filtered using a DNA-RNA Pearson correlation cut-off and a requirement that the gene was deemed essential in at least 5% of human breast cancer cell lines from an RNA-mediated interference screen database. Five potential personalized drug target genes, which were spontaneously amplified loci in both murine and human basal-like tumors, were identified: Cul4a, Lamp1, Met, Pnpla6 and Tubgcp3 As a proof of concept, inhibition of Met using crizotinib caused Met-amplified murine tumors to initially undergo complete regression. This study identifies Met as a promising drug target in a subset of murine Trp53-null tumors, thus identifying a potential shared driver with a subset of human basal-like breast cancers. Our results also highlight the importance of comparative genomic studies for discovering personalized drug targets and for providing a preclinical model for further investigations of key tumor signaling pathways.
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Affiliation(s)
- Adam D Pfefferle
- Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, NC 27599, USA Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Yash N Agrawal
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Daniel C Koboldt
- The McDonnell Genome Institute, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Krishna L Kanchi
- The McDonnell Genome Institute, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Jason I Herschkowitz
- Department of Biomedical Sciences, University at Albany, Rensselaer, NY 12144, USA
| | - Elaine R Mardis
- The McDonnell Genome Institute, Washington University School of Medicine, St Louis, MO 63108, USA
| | - Jeffrey M Rosen
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Charles M Perou
- Department of Pathology and Laboratory Medicine, University of North Carolina, Chapel Hill, NC 27599, USA Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC 27599, USA Department of Genetics, University of North Carolina, Chapel Hill, NC 27599, USA
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50
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Badertscher L, Wild T, Montellese C, Alexander L, Bammert L, Sarazova M, Stebler M, Csucs G, Mayer T, Zamboni N, Zemp I, Horvath P, Kutay U. Genome-wide RNAi Screening Identifies Protein Modules Required for 40S Subunit Synthesis in Human Cells. Cell Rep 2015; 13:2879-91. [DOI: 10.1016/j.celrep.2015.11.061] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 10/11/2015] [Accepted: 11/18/2015] [Indexed: 02/08/2023] Open
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