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Wu J, Hu W, Yang W, Long Y, Chen K, Li F, Ma X, Li X. Knockdown of SQLE promotes CD8+ T cell infiltration in the tumor microenvironment. Cell Signal 2024; 114:110983. [PMID: 37993027 DOI: 10.1016/j.cellsig.2023.110983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 11/13/2023] [Accepted: 11/15/2023] [Indexed: 11/24/2023]
Abstract
Cholesterol biosynthesis and metabolism are critical aspects that shape the process of tumor development and associated microenvironmental conditions owing to the ability of cholesterol to drive tumor growth and invasion. Squalene Epoxidase (SQLE) is the second rate-limiting enzyme involved in the synthesis of cholesterol. The functional role of SQLE within the tumor microenvironment, however, has yet to be established. Here we show that SQLE is distinctively expressed across most types of cancer, and the expression level is highly correlated with tumor mutation burden and microsatellite instability. Accordingly, SQLE was identified as a prognostic risk factor in cancer patients. In addition, we observed a negative correlation between SQLE expression and immune cell infiltration across multiple cancers, and murine xenograft model further confirmed that SQLE knockdown was associated with enhanced intratumoral CD8+ T cell infiltration. Using next-generation sequencing, we identified 410 genes distinctively expressed in tumors exhibiting SQLE inhibition. KEGG and GO analysis further verified that SQLE altered the immune response in the tumor microenvironment. Furthermore, we found that the metabolism and translation of proteins is the main binding factor with SQLE. Our findings ascertain that SQLE is a potential target in multiple cancers and suppressing SQLE establishes an essential mechanism for shaping tumor microenvironment.
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Affiliation(s)
- Jun Wu
- Key Laboratory of Brain, Cognition and Education Sciences, Institute for Brain Research and Rehabilitation, Guangdong Key Laboratory of Mental Health and Cognitive Science, Ministry of Education, South China Normal University, Guangzhou 510631, China
| | - Weibin Hu
- Key Laboratory of Brain, Cognition and Education Sciences, Institute for Brain Research and Rehabilitation, Guangdong Key Laboratory of Mental Health and Cognitive Science, Ministry of Education, South China Normal University, Guangzhou 510631, China
| | - Wenhui Yang
- Key Laboratory of Brain, Cognition and Education Sciences, Institute for Brain Research and Rehabilitation, Guangdong Key Laboratory of Mental Health and Cognitive Science, Ministry of Education, South China Normal University, Guangzhou 510631, China
| | - Yihao Long
- Key Laboratory of Brain, Cognition and Education Sciences, Institute for Brain Research and Rehabilitation, Guangdong Key Laboratory of Mental Health and Cognitive Science, Ministry of Education, South China Normal University, Guangzhou 510631, China
| | - Kaizhao Chen
- Key Laboratory of Brain, Cognition and Education Sciences, Institute for Brain Research and Rehabilitation, Guangdong Key Laboratory of Mental Health and Cognitive Science, Ministry of Education, South China Normal University, Guangzhou 510631, China
| | - Fugui Li
- Cancer Research Institute of Zhongshan City, Zhongshan City People's Hospital, Zhongshan 528403, China
| | - Xiaodong Ma
- Key Laboratory of Brain, Cognition and Education Sciences, Institute for Brain Research and Rehabilitation, Guangdong Key Laboratory of Mental Health and Cognitive Science, Ministry of Education, South China Normal University, Guangzhou 510631, China.
| | - Xun Li
- Hubei Key Laboratory of Tumor Microenvironment and Immunotherapy, College of Basic Medical Science, China Three Gorges University, Yichang 443002, China.
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Ma S, Liu JY, Zhang JT. eIF3d: A driver of noncanonical cap-dependent translation of specific mRNAs and a trigger of biological/pathological processes. J Biol Chem 2023; 299:104658. [PMID: 36997088 PMCID: PMC10165153 DOI: 10.1016/j.jbc.2023.104658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 03/20/2023] [Accepted: 03/21/2023] [Indexed: 03/31/2023] Open
Abstract
Eukaryotic initiation factor 3d (eIF3d), a known RNA-binding subunit of the eIF3 complex, is a 66 to 68-kDa protein with an RNA-binding motif and a cap-binding domain. Compared with other eIF3 subunits, eIF3d is relatively understudied. However, recent progress in studying eIF3d has revealed a number of intriguing findings on its role in maintaining eIF3 complex integrity, global protein synthesis, and in biological and pathological processes. It has also been reported that eIF3d has noncanonical functions in regulating translation of a subset of mRNAs by binding to 5'-UTRs or interacting with other proteins independent of the eIF3 complex and additional functions in regulating protein stability. The noncanonical regulation of mRNA translation or protein stability may contribute to the role of eIF3d in biological processes such as metabolic stress adaptation and in disease onset and progression including severe acute respiratory syndrome coronavirus 2 infection, tumorigenesis, and acquired immune deficiency syndrome. In this review, we critically evaluate the recent studies on these aspects of eIF3d and assess prospects in understanding the function of eIF3d in regulating protein synthesis and in biological and pathological processes.
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Affiliation(s)
- Shijie Ma
- Department of Cell and Cancer Biology, The University of Toledo College of Medicine and Life Sciences, Toledo, Ohio, USA
| | - Jing-Yuan Liu
- Department of Medicine, The University of Toledo College of Medicine and Life Sciences, Toledo, Ohio, USA
| | - Jian-Ting Zhang
- Department of Cell and Cancer Biology, The University of Toledo College of Medicine and Life Sciences, Toledo, Ohio, USA.
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Jiao H, Zeng L, Yang S, Zhang J, Lou W. Knockdown EIF3C Suppresses Cell Proliferation and Increases Apoptosis in Pancreatic Cancer Cell. Dose Response 2020; 18:1559325820950061. [PMID: 32973416 PMCID: PMC7493259 DOI: 10.1177/1559325820950061] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 04/02/2020] [Accepted: 05/29/2020] [Indexed: 11/16/2022] Open
Abstract
Increasing evidence shows that eukaryotic initiation factor subunit (EIF3C) plays a crucial role in development of tumors. However, the underlying roles of EIF3Cin the development of pancreatic cancer (PC) remain unknown. In this study, we examined the expression of EIF3C in PC tissues, their adjacent normal tissues and 3 cell lines (SW1990, PANC-1 and AsPC-1). Moreover, the EIF3C-shRNA lentivirus was constructed to suppress EIF3C expression. Following this, the cell colony formation assay was employed to evaluate proliferation ability of PC cells. Meanwhile, the cell cycle and apoptotic assays were also performed by flow cytometry. We found that level of EIF3C in PC tissues was significantly increased compared with that in adjacent normal tissues. Furthermore, the knockdown of EIF3C can significantly reduce cell proliferation, block cell cycle in G2/M and induce apoptosis in both SW1990 and PANC-1 cells. Our findings suggest that EIF3C plays a crucial role in the progression of PC and may be a potential target in the treatment of PC.
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Affiliation(s)
- Heng Jiao
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Lingxiao Zeng
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Shengsheng Yang
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Second Military Medical University, Shanghai, China
| | - Jianpeng Zhang
- Department of Biochemistry and Molecular Biology, College of Basic Medical Sciences, Second Military Medical University, Shanghai, China
| | - Wenhui Lou
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
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4
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Brocca G, Ferraresso S, Zamboni C, Martinez-Merlo EM, Ferro S, Goldschmidt MH, Castagnaro M. Array Comparative Genomic Hybridization Analysis Reveals Significantly Enriched Pathways in Canine Oral Melanoma. Front Oncol 2019; 9:1397. [PMID: 31921654 PMCID: PMC6920211 DOI: 10.3389/fonc.2019.01397] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 11/26/2019] [Indexed: 12/28/2022] Open
Abstract
Human Mucosal Melanoma (hMM) is an aggressive neoplasm of neuroectodermal origin with distinctive features from the more common cutaneous form of malignant melanoma (cMM). At the molecular level, hMMs are characterized by large chromosomal aberrations rather than single-nucleotide mutations, typically observed in cMM. Given the scarcity of available cases, there have been many attempts to establish a reliable animal model. In pet dogs, Canine Oral Melanoma (COM) is the most common malignant tumor of the oral cavity, sharing clinical and histological aspects with hMM. To improve the knowledge about COM's genomic DNA alterations, in the present work, formalin-fixed, paraffin-embedded (FFPE) samples of COM from different European archives were collected to set up an array Comparative Genomic Hybridization (aCGH) analysis to estimate recurrent Copy Number Aberrations (CNAs). DNA was extracted in parallel from tumor and healthy fractions and 19 specimens were successfully submitted to labeling and competitive hybridization. Data were statistically analyzed through GISTIC2.0 and a pathway-enrichment analysis was performed with ClueGO. Recurrent gained regions were detected, affecting chromosomes CFA 10, 13 and 30, while lost regions involved chromosomes CFA 10, 11, 22, and 30. In particular, CFA 13 showed a whole-chromosome gain in 37% of the samples, while CFA 22 showed a whole-chromosome loss in 25%. A distinctive sigmoidal trend was observed in CFA 10 and 30 in 25 and 30% of the samples, respectively. Comparative analysis revealed that COM and hMM share common chromosomal changes in 32 regions. MAPK- and PI3K-related genes were the most frequently involved, while pathway analysis revealed statistically significant perturbation of cancer-related biological processes such as immune response, drug metabolism, melanocytes homeostasis, and neo-angiogenesis. The latter is a new evidence of a significant involvement of neovascularization-related pathways in COMs and can provide the rationale for future application in anti-cancer targeted therapies.
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Affiliation(s)
- Ginevra Brocca
- Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, Italy
| | - Serena Ferraresso
- Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, Italy
| | - Clarissa Zamboni
- Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, Italy
| | | | - Silvia Ferro
- Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, Italy
| | - Michael H Goldschmidt
- School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Massimo Castagnaro
- Department of Comparative Biomedicine and Food Science, University of Padua, Legnaro, Italy
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Overexpression of eIF3D in Lung Adenocarcinoma Is a New Independent Prognostic Marker of Poor Survival. DISEASE MARKERS 2019; 2019:6019637. [PMID: 31885740 PMCID: PMC6925810 DOI: 10.1155/2019/6019637] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 09/02/2019] [Accepted: 09/26/2019] [Indexed: 12/16/2022]
Abstract
The eukaryotic initiation factor 3 (eIF3) is the largest and most complex translation initiation factor in mammalian cells. It consists of 13 subunits and among which several were implicated to have significant prognostic effects on multiple human cancer entities. To examine the expression profiles of eIF3 subunits and determine their prognostic value in patients with lung adenocarcinoma (LUAD), the genomic data, survival data, and related clinical information were obtained from The Cancer Genome Atlas (TCGA) project for a secondary analysis. The results showed that among ten aberrantly expressed eIF3 subunits in tumours compared with adjacent normal counterparts (p < 0.05), only upregulated eIF3D could predict poor overall survival (OS) outcome independent of multiple clinicopathological parameters (HR = 2.043, 95% CI: 1.132-3.689, p = 0.018). Chi-square analysis revealed that the highly expressed eIF3D group had larger ratios of patients with advanced pathological stage (68/40 vs. 184/206, p = 0.0046), residual tumour (13/4 vs. 163/176, p = 0.0257), and targeted molecular therapy (85/65 vs. 138/164, p = 0.0357). In silico analysis demonstrated that the altered expression of eIF3D was at least regulated by both copy number alterations (CNAs) and the hypomethylation of cg14297023 site. In conclusion, high eIF3D expression might serve as a valuable independent prognostic indicator of shorter OS in patients with LUAD.
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Maekawa M, Hiyoshi H, Nakayama J, Kido K, Sawasaki T, Semba K, Kubota E, Joh T, Higashiyama S. Cullin-3/KCTD10 complex is essential for K27-polyubiquitination of EIF3D in human hepatocellular carcinoma HepG2 cells. Biochem Biophys Res Commun 2019; 516:1116-1122. [PMID: 31280863 DOI: 10.1016/j.bbrc.2019.07.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 07/02/2019] [Indexed: 12/17/2022]
Abstract
Eukaryotic translation initiation factor 3 subunit D (EIF3D) binds to the 5'-cap of specific mRNAs, initiating their translation into polypeptides. From a pathological standpoint, EIF3D has been observed to be essential for cell growth in various cancer types, and cancer patients with high EIF3D mRNA levels exhibit poor prognosis, indicating involvement of EIF3D in oncogenesis. In this study, we found, by mass spectrometry, that Cullin-3 (CUL3)/KCTD10 ubiquitin (Ub) ligase forms a complex with EIF3D. We also demonstrated that EIF3D is K27-polyubiquitinated at the lysine 153 and 275 residues in a KCTD10-dependent manner in human hepatocellular carcinoma HepG2 cells. Similar to other cancers, high expression of EIF3D significantly correlated with poor prognosis in hepatocellular carcinoma patients, and depletion of EIF3D drastically suppressed HepG2 cell proliferation. These results indicate that EIF3D is a novel substrate of CUL3/KCTD10 Ub ligase and suggest involvement of K27-polyubiquitinated EIF3D in the development of hepatocellular carcinoma.
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Affiliation(s)
- Masashi Maekawa
- Division of Cell Growth and Tumor Regulation, Proteo-Science Center, Ehime University, Shitsukawa, Toon, Ehime, 791-0295, Japan; Department of Biochemistry and Molecular Genetics, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, 791-0295, Japan.
| | - Hiromi Hiyoshi
- Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan
| | - Jun Nakayama
- Department of Life Science and Medical Bioscience, School of Advanced Science and Engineering, Waseda University, 2-2 Wakamatsucho, Shinjuku-ku, Tokyo, 162-8480, Japan
| | - Kohki Kido
- Division of Cell-Free Science, Proteo-Science Center, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime, 790-8577, Japan
| | - Tatsuya Sawasaki
- Division of Cell-Free Science, Proteo-Science Center, Ehime University, 3 Bunkyo-cho, Matsuyama, Ehime, 790-8577, Japan
| | - Kentaro Semba
- Department of Life Science and Medical Bioscience, School of Advanced Science and Engineering, Waseda University, 2-2 Wakamatsucho, Shinjuku-ku, Tokyo, 162-8480, Japan
| | - Eiji Kubota
- Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan
| | - Takashi Joh
- Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan; Gamagori City Hospital, 1-1 Mukaida, Hirata-Cho, Gamagori, Aichi, 443-8501, Japan
| | - Shigeki Higashiyama
- Division of Cell Growth and Tumor Regulation, Proteo-Science Center, Ehime University, Shitsukawa, Toon, Ehime, 791-0295, Japan; Department of Biochemistry and Molecular Genetics, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, 791-0295, Japan.
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7
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Grafanaki K, Anastasakis D, Kyriakopoulos G, Skeparnias I, Georgiou S, Stathopoulos C. Translation regulation in skin cancer from a tRNA point of view. Epigenomics 2018; 11:215-245. [PMID: 30565492 DOI: 10.2217/epi-2018-0176] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Protein synthesis is a central and dynamic process, frequently deregulated in cancer through aberrant activation or expression of translation initiation factors and tRNAs. The discovery of tRNA-derived fragments, a new class of abundant and, in some cases stress-induced, small Noncoding RNAs has perplexed the epigenomics landscape and highlights the emerging regulatory role of tRNAs in translation and beyond. Skin is the biggest organ in human body, which maintains homeostasis of its multilayers through regulatory networks that induce translational reprogramming, and modulate tRNA transcription, modification and fragmentation, in response to various stress signals, like UV irradiation. In this review, we summarize recent knowledge on the role of translation regulation and tRNA biology in the alarming prevalence of skin cancer.
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Affiliation(s)
- Katerina Grafanaki
- Department of Biochemistry, School of Medicine, University of Patras, 26504 Patras, Greece.,Department of Dermatology, School of Medicine, University of Patras, 26504 Patras, Greece
| | - Dimitrios Anastasakis
- National Institute of Musculoskeletal & Arthritis & Skin, NIH, 50 South Drive, Room 1152, Bethesda, MD 20892, USA
| | - George Kyriakopoulos
- Department of Biochemistry, School of Medicine, University of Patras, 26504 Patras, Greece
| | - Ilias Skeparnias
- Department of Biochemistry, School of Medicine, University of Patras, 26504 Patras, Greece
| | - Sophia Georgiou
- Department of Dermatology, School of Medicine, University of Patras, 26504 Patras, Greece
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hmiR-34c-3p upregulation inhibits the proliferation of colon cancer cells by targeting EIF3D. Anticancer Drugs 2018; 29:975-982. [DOI: 10.1097/cad.0000000000000674] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Yin Y, Long J, Sun Y, Li H, Jiang E, Zeng C, Zhu W. The function and clinical significance of eIF3 in cancer. Gene 2018; 673:130-133. [PMID: 29908282 DOI: 10.1016/j.gene.2018.06.034] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 06/09/2018] [Accepted: 06/11/2018] [Indexed: 11/15/2022]
Abstract
Abnormal regulation of gene expression is essential for tumorigenesis. Several studies indicate that regulation of oncogene expression and neoplastic transformation are controlled by subunits of eukaryotic translation initiation factors (eIFs). Eukaryotic translation initiation factor 3 (eIF3) is the largest (800 kDa) and the most complex mammalian initiation factor. It is composed of 13 non-identical polypeptides designated as eIF3a-m and plays a pivotal role in protein synthesis that bridges the 43S pre-initiation complex and eIF4F-bound mRNA. However, the functional roles of individual subunits are not yet very clear. This review presents on several of aberrant expressed eIF3 subunits which are detected in various human cancers and the associated mechanisms have been acknowledged or are still not sure. Finally, identifying novel targets and biomarkers for caner is of great importance in early diagnosis and treatment of cancer. eIF3 may be a novel target molecule in drug development for cancer treatment and prevention.
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Affiliation(s)
- Yuting Yin
- Department of Pathology, School of Basic Medicine, Guangdong Medical University, Dongguan 523808, Guangdong Province, China
| | - Jiali Long
- Department of Pathology, School of Basic Medicine, Guangdong Medical University, Dongguan 523808, Guangdong Province, China
| | - Yanqin Sun
- Department of Pathology, School of Basic Medicine, Guangdong Medical University, Dongguan 523808, Guangdong Province, China
| | - Hongmei Li
- Department of Pathology, School of Basic Medicine, Guangdong Medical University, Dongguan 523808, Guangdong Province, China
| | - Enping Jiang
- Department of Pathology, School of Basic Medicine, Guangdong Medical University, Dongguan 523808, Guangdong Province, China
| | - Chao Zeng
- Department of Pathology, School of Basic Medicine, Guangdong Medical University, Dongguan 523808, Guangdong Province, China.
| | - Wei Zhu
- Department of Pathology, School of Basic Medicine, Guangdong Medical University, Dongguan 523808, Guangdong Province, China.
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He J, Wang X, Cai J, Wang W, Qin X. High expression of eIF3d is associated with poor prognosis in patients with gastric cancer. Cancer Manag Res 2017; 9:539-544. [PMID: 29123423 PMCID: PMC5661832 DOI: 10.2147/cmar.s142324] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Background Eukaryotic initiation factor 3 subunit d (eIF3d) is the largest subunit of eIF3, which is shown to promote protein synthesis in cancer cells. Increased expression of eIF3d has been shown in some types of cancers, but has not been previously studied in gastric cancer (GC). Thus, the aim of this study was to analyze eIF3d expression in GC. Patients and methods Expression of eIF3d was detected by immunohistochemistry in GC tissues and adjacent noncancerous (ANC) tissues. Samples were obtained from 210 patients with GC who had received curative gastrectomy. Clinicopathological features and survival rate were also analyzed. Results Expression rates of eIF3d in GC and ANC were 45.2% and 21.0%, respectively. High expression of eIF3d protein was significantly related to tumor stage, as determined by lymph node metastasis and depth of invasion (p<0.05). The Kaplan–Meier survival curves showed that patients with high eIF3d expression had a significantly poor overall survival (p=0.005). Multivariate Cox regression analyses showed that the level of eIF3d was an independent predictive factor of poor prognosis for GC (p=0.017). Conclusion Expression of eIF3d was upregulated in GC. High expression of eIF3d was determined as an independent poor prognostic factor in GC. It is suggested that eIF3d could be a good biomarker in GC.
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Affiliation(s)
- Jiaqi He
- Department of General Surgery, Huadong Hospital
| | - Xuefei Wang
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Jianhua Cai
- Department of General Surgery, Huadong Hospital
| | - Wei Wang
- Department of General Surgery, Huadong Hospital
| | - Xinyu Qin
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, People's Republic of China
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Zha S, Yin Y, Wang Y, Huang Y, Li Y, Wang Z. Cloning and functional analysis of farnesyl pyrophosphate synthase (FPPS) gene from Mylabris cichorii. Biotechnol Appl Biochem 2017; 64:667-676. [DOI: 10.1002/bab.1494] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 12/30/2015] [Accepted: 02/28/2016] [Indexed: 01/01/2023]
Affiliation(s)
- Shenfang Zha
- Chongqing Engineering Research Center for Fungal Insecticide; School of Life Science; Chongqing University; Chongqing People's Republic of China
| | - Youping Yin
- Chongqing Engineering Research Center for Fungal Insecticide; School of Life Science; Chongqing University; Chongqing People's Republic of China
| | - Yu Wang
- Chongqing Engineering Research Center for Fungal Insecticide; School of Life Science; Chongqing University; Chongqing People's Republic of China
| | - Yi Huang
- Chongqing Engineering Research Center for Fungal Insecticide; School of Life Science; Chongqing University; Chongqing People's Republic of China
| | - Yan Li
- Chongqing Engineering Research Center for Fungal Insecticide; School of Life Science; Chongqing University; Chongqing People's Republic of China
| | - Zhongkang Wang
- Chongqing Engineering Research Center for Fungal Insecticide; School of Life Science; Chongqing University; Chongqing People's Republic of China
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12
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Knockdown of eukaryotic translation initiation factor 3 subunit D (eIF3D) inhibits proliferation of acute myeloid leukemia cells. Mol Cell Biochem 2017; 438:191-198. [PMID: 28801778 DOI: 10.1007/s11010-017-3127-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Accepted: 07/26/2017] [Indexed: 12/22/2022]
Abstract
Various eukaryotic translation initiation factors (eIFs) have been implicated in carcinoma development. Eukaryotic translation initiation factor 3 subunit D (eIF3D) has recently been shown to regulate the growth of several types of human cancer cells. However, the function of eIF3D in acute myeloid leukemia (AML) remains unclear. In this study, we investigated the expression of eIF3D in three AML cell lines and a lymphoblast cell line, and found that eIF3D was expressed in all four leukemia cell lines. To explore the role of eIF3D in AML cell proliferation, lentivirus-mediated RNA interference was applied to knock down the expression of eIF3D in U937 cells. The expression of eIF3D was significantly downregulated in U937 cells after eIF3D knockdown, as confirmed by quantitative real-time PCR (qRT-PCR) and Western blot analysis. Knockdown of eIF3D significantly inhibited proliferation of U937 cells. Furthermore, flow cytometry analysis revealed that eIF3D silencing induced cell cycle arrest at the G2/M phase, ultimately leading to apoptosis. Our results indicate that eIF3D plays a key role in the proliferation of AML cells, and suggest that eIF3D silencing might be a potential therapeutic strategy for leukemia.
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EIF3D promotes gallbladder cancer development by stabilizing GRK2 kinase and activating PI3K-AKT signaling pathway. Cell Death Dis 2017; 8:e2868. [PMID: 28594409 PMCID: PMC5520919 DOI: 10.1038/cddis.2017.263] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 05/07/2017] [Accepted: 05/08/2017] [Indexed: 02/05/2023]
Abstract
Recent evidence suggests that dysregulated eIF3d expression may be critical in various genetic disorders as well as cancer. In this study, we observed that EIF3d levels increased in gallbladder cancer (GBC) samples compared with non-tumor tissue. High eIF3d levels were associated with advanced tumor stage and metastasis and were correlated with poor prognosis in 92 patients with GBC. Depletion of EIF3d in GBC cell lines inhibited cell proliferation, colony formation and metastasis and induced apoptosis and cell cycle arrest in vitro and in vivo. In contrast, ectopic expression of eIF3d had the opposite effects. Moreover, in this study, we revealed that a novel non-translational factor function of eIF3d mediated its protumoral effects. In details, eIF3d stabilizes GRK2 protein by blocking ubiquitin-mediated degradation, consequently activates PI3K/Akt signaling, and promotes GBC cell proliferation and migration. In conclusion, eIF3d promotes GBC progression mainly via eIF3d-GRK2-AKT axis and it may be used as a prognostic factor. The therapeutic targeting of eIF3d-GRK2 axis may be a potential treatment approach for GBC.
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14
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Proteomics analysis of bladder cancer invasion: Targeting EIF3D for therapeutic intervention. Oncotarget 2017; 8:69435-69455. [PMID: 29050215 PMCID: PMC5642490 DOI: 10.18632/oncotarget.17279] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 04/07/2017] [Indexed: 02/07/2023] Open
Abstract
Patients with advanced bladder cancer have poor outcomes, indicating a need for more efficient therapeutic approaches. This study characterizes proteomic changes underlying bladder cancer invasion aiming for the better understanding of disease pathophysiology and identification of drug targets. High resolution liquid chromatography coupled to tandem mass spectrometry analysis of tissue specimens from patients with non-muscle invasive (NMIBC, stage pTa) and muscle invasive bladder cancer (MIBC, stages pT2+) was conducted. Comparative analysis identified 144 differentially expressed proteins between analyzed groups. These included proteins previously associated with bladder cancer and also additional novel such as PGRMC1, FUCA1, BROX and PSMD12, which were further confirmed by immunohistochemistry. Pathway and interactome analysis predicted strong activation in muscle invasive bladder cancer of pathways associated with protein synthesis e.g. eIF2 and mTOR signaling. Knock-down of eukaryotic translation initiation factor 3 subunit D (EIF3D) (overexpressed in muscle invasive disease) in metastatic T24M bladder cancer cells inhibited cell proliferation, migration, and colony formation in vitro and decreased tumor growth in xenograft models. By contrast, knocking down GTP-binding protein Rheb (which is upstream of EIF3D) recapitulated the effects of EIF3D knockdown in vitro, but not in vivo. Collectively, this study represents a comprehensive analysis of NMIBC and MIBC providing a resource for future studies. The results highlight EIF3D as a potential therapeutic target.
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Lin Y, Zhang R, Zhang P. Eukaryotic translation initiation factor 3 subunit D overexpression is associated with the occurrence and development of ovarian cancer. FEBS Open Bio 2016; 6:1201-1210. [PMID: 28203520 PMCID: PMC5302064 DOI: 10.1002/2211-5463.12137] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 08/29/2016] [Accepted: 09/21/2016] [Indexed: 12/24/2022] Open
Abstract
Ovarian cancer is the most common cause of gynaecological cancer-associated death; thus, promising biomarkers and new therapeutic targets for ovarian cancer must be explored. Here, we report that eukaryotic translation initiation factor 3 subunit D (EIF3D), a member of the EIF3 family, was overexpressed in ovarian cancer clinical tissues. Furthermore, the expression of EIF3D was correlated with the International Federation of Gynecology and Obstetrics stage and pathological differentiation stage. 3-(4,5-dimethylthylthiazol-2-yl)-2 (MTT) and colony formation assays revealed that the lentivirus-mediated knockdown of EIF3D suppresses cell proliferation in the ovarian tumour cell lines CAOV-3 and SKOV-3. Flow cytometry revealed that cells were arrested at the G2/M phase of the cell cycle and that cyclin-dependent kinase 1 was also altered after EIF3D silencing. The results presented here demonstrate that EIF3D may play an important role in the occurrence and development of ovarian cancer.
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Affiliation(s)
- Yaying Lin
- Department of Gynecology Xinhua Hospital Shanghai Jiao Tong University School of Medicine China
| | - Rongrong Zhang
- Department of Gynecology Xinhua Hospital Shanghai Jiao Tong University School of Medicine China
| | - Ping Zhang
- Department of Gynecology Xinhua Hospital Shanghai Jiao Tong University School of Medicine China
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Assembly of eIF3 Mediated by Mutually Dependent Subunit Insertion. Structure 2016; 24:886-96. [PMID: 27210288 DOI: 10.1016/j.str.2016.02.024] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Revised: 02/19/2016] [Accepted: 02/21/2016] [Indexed: 02/05/2023]
Abstract
Eukaryotic initiation factor 3 (eIF3), an essential multi-protein complex involved in translation initiation, is composed of 12 tightly associated subunits in humans. While the overall structure of eIF3 is known, the mechanism of its assembly and structural consequences of dysregulation of eIF3 subunit expression seen in many cancers is largely unknown. Here we show that subunits in eIF3 assemble into eIF3 in an interdependent manner. Assembly of eIF3 is governed primarily by formation of a helical bundle, composed of helices extending C-terminally from PCI-MPN domains in eight subunits. We propose that, while the minimal subcomplex of human-like eIF3 functional for translation initiation in cells consists of subunits a, b, c, f, g, i, and m, numerous other eIF3 subcomplexes exist under circumstances of subunit over- or underexpression. Thus, eIF3 subcomplexes formed or "released" due to dysregulated subunit expression may be determining factors contributing to eIF3-related cancers.
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Pan XW, Chen L, Hong Y, Xu DF, Liu X, Li L, Huang Y, Cui LM, Gan SS, Yang QW, Huang H, Qu FJ, Ye JQ, Wang LH, Cui XG. EIF3D silencing suppresses renal cell carcinoma tumorigenesis via inducing G2/M arrest through downregulation of Cyclin B1/CDK1 signaling. Int J Oncol 2016; 48:2580-90. [PMID: 27035563 DOI: 10.3892/ijo.2016.3459] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 03/10/2016] [Indexed: 11/06/2022] Open
Abstract
There are no effective therapies for advanced renal cell carcinoma (RCC), except for VEGFR inhibitors with only ~50% response rate. To identify novel targets and biomarkers for RCC is of great importance in treating RCC. In this study, we observed that eukaryotic initiation factor 3d (EIF3D) expression was significantly increased in RCC compared with paracarcinoma tissue using immunohistochemistry staining and western blot analysis. Furthermore, bioinformatics meta-analysis using ONCOMINE microarray datasets showed that EIF3D mRNA expressions in CCRCC tissue specimens were significantly higher than that in normal tissue specimens. In addition, RCC tissue microarray demonstrated that elevated EIF3D expression was positively correlated with TNM stage and tumor size. EIF3D silencing in human 786-O and ACHN CCRCC cell lines by RNA interference demonstrated that EIF3D knockdown obviously inhibited cell proliferation and colony formation, caused G2/M arrest through downregulation of Cyclin B1 and Cdk1 and upregulation of p21, and induced apoptosis shown by sub-G1 accumulation and RARP cleavage. Moreover, correlation analysis using ONCOMINE microarray datasets indicated that increased EIF3D mRNA expression was positively correlated to PCNA, Cyclin B1 and CDK1 mRNA expression in RCC. Collectively, these results provide reasonable evidences that EIF3D may function as a potential proto-oncogene that participates in the occurrence and progression of RCC.
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Affiliation(s)
- Xiu-Wu Pan
- Department of Urinary Surgery of Changzheng Hospital, Second Military Medical University, Shanghai 200003, P.R. China
| | - Lu Chen
- Department of Urinary Surgery of Changzheng Hospital, Second Military Medical University, Shanghai 200003, P.R. China
| | - Yi Hong
- Duruo Biotechnologies Inc., Shanghai 200233, P.R. China
| | - Dan-Feng Xu
- Department of Urinary Surgery of Ruijin Hospital, Shanghai Jiaotong University, Shanghai 200025, P.R. China
| | - Xi Liu
- Department of Urinary Surgery of Changzheng Hospital, Second Military Medical University, Shanghai 200003, P.R. China
| | - Lin Li
- Department of Urinary Surgery of Changzheng Hospital, Second Military Medical University, Shanghai 200003, P.R. China
| | - Yi Huang
- Department of Urinary Surgery of Changzheng Hospital, Second Military Medical University, Shanghai 200003, P.R. China
| | - Li-Ming Cui
- Department of Urinary Surgery of Ruijin Hospital, Shanghai Jiaotong University, Shanghai 200025, P.R. China
| | - Si-Shun Gan
- Department of Urinary Surgery of Third Affiliated Hospital, Second Military Medical University, Shanghai 201805, P.R. China
| | - Qi-Wei Yang
- Department of Urinary Surgery of Changzheng Hospital, Second Military Medical University, Shanghai 200003, P.R. China
| | - Hai Huang
- Department of Urinary Surgery of Changzheng Hospital, Second Military Medical University, Shanghai 200003, P.R. China
| | - Fa-Jun Qu
- Department of Urinary Surgery of Third Affiliated Hospital, Second Military Medical University, Shanghai 201805, P.R. China
| | - Jian-Qing Ye
- Department of Urinary Surgery of Third Affiliated Hospital, Second Military Medical University, Shanghai 201805, P.R. China
| | - Lin-Hui Wang
- Department of Urinary Surgery of Changzheng Hospital, Second Military Medical University, Shanghai 200003, P.R. China
| | - Xin-Gang Cui
- Department of Urinary Surgery of Third Affiliated Hospital, Second Military Medical University, Shanghai 201805, P.R. China
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Lin Z, Xiong L, Lin Q. Knockdown of eIF3d inhibits cell proliferation through G2/M phase arrest in non-small cell lung cancer. Med Oncol 2015; 32:183. [PMID: 26008152 DOI: 10.1007/s12032-015-0625-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 04/21/2015] [Indexed: 12/15/2022]
Abstract
Non-small cell lung cancer (NSCLC) is the most common type of lung cancer and remains the leading cause of cancer-related death worldwide. Eukaryotic translation initiation factor 3, subunit d (eIF3d) has been recognized recently in several human cancers. In this paper, we attempt to evaluate the functional role of eIF3d in NSCLC cells. Lentivirus-mediated RNA interference (RNAi) was applied to silence eIF3d in the human NSCLC cell lines A549 and 95D. Cell viability was measured by MTT. Cell colony-forming ability was measured by colony formation. Cell cycle progression was determined by propidium iodide staining and flow cytometry. Intracellular signaling molecules were detected using a PathScan(®) intracellular signaling array kit. In this study, we firstly proved that lentivirus-mediated RNAi specifically suppressed the expression of eIF3d both at the mRNA and protein levels in A549 and 95D cell lines. Further investigations revealed that eIF3d knockdown significantly inhibited cell proliferation and colony formation. Moreover, the cell cycle of A549 cells was arrested at G2/M phase after eIF3d knockdown. Furthermore, the activations of AKT, HSP27 and SAPK/JNK were suppressed by eIF3d knockdown. This study highlights the crucial role of eIF3d in promoting NSCLC cell proliferation, and provides a foundation for further study into the clinical potential of lentiviral-mediated delivery of eIF3d RNAi therapy for treatment of NSCLC.
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Affiliation(s)
- Zhifeng Lin
- Department of Thoracic Surgery, Shanghai First People's Hospital, Shanghai Jiaotong University, No. 100 HaiNing Road, Shanghai, 200080, China
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