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Zhang H, Li X, Sun W, Qin H, Li H, Yan H, Wang H, Zhang X, Zhang S, Wang H. PTEN and P-4E-BP1 might be associated with postoperative recurrence of rectal cancer patients undergoing concurrent radiochemotherapy. BMC Cancer 2024; 24:582. [PMID: 38741069 DOI: 10.1186/s12885-024-12339-x] [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: 10/10/2023] [Accepted: 05/03/2024] [Indexed: 05/16/2024] Open
Abstract
BACKGROUND Local recurrence after surgery and radiochemotherapy seriously affects the prognosis of locally advanced rectal cancer (LARC) patients. Studies on molecular markers related to the radiochemotherapy sensitivity of cancers have been widely carried out, which might provide valued information for clinicians to carry out individual treatment. AIM To find potential biomarkers of tumors for predicting postoperative recurrence. METHODS In this study, LARC patients undergoing surgery and concurrent radiochemotherapy were enrolled. We focused on clinicopathological factors and PTEN, SIRT1, p-4E-BP1, and pS6 protein expression assessed by immunohistochemistry in 73 rectal cancer patients with local recurrence and 76 patients without local recurrence. RESULTS The expression of PTEN was higher, while the expression of p-4E-BP1 was lower in patients without local recurrence than in patients with local recurrence. Moreover, TNM stage, lymphatic vessel invasion (LVI), PTEN and p-4E-BP1 might be independent risk factors for local recurrence after LARC surgery combined with concurrent radiochemotherapy. CONCLUSIONS This study suggests that PTEN and p-4E-BP1 might be potential biomarkers for prognostic prediction and therapeutic targets for LARC.
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Affiliation(s)
- Heng Zhang
- Department of Oncology, Tianjin Union Medical Center, Nankai University, No.190 Jieyuan Road, Hongqiao District, Tianjin, 300121, P. R. China
| | - Xiaofan Li
- Department of Oncology, People's Hospital of Rongcheng, Shandong, Rongcheng, P. R. China
| | - Wanjun Sun
- Department of Oncology, Tianjin Union Medical Center, Nankai University, No.190 Jieyuan Road, Hongqiao District, Tianjin, 300121, P. R. China
| | - Haoren Qin
- Department of Oncology, Tianjin Union Medical Center, Nankai University, No.190 Jieyuan Road, Hongqiao District, Tianjin, 300121, P. R. China
| | - Haipeng Li
- Department of Oncology, Tianjin Union Medical Center, Nankai University, No.190 Jieyuan Road, Hongqiao District, Tianjin, 300121, P. R. China
| | - Hao Yan
- Department of Oncology, Tianjin Union Medical Center, Nankai University, No.190 Jieyuan Road, Hongqiao District, Tianjin, 300121, P. R. China
| | - Huaqing Wang
- Department of Oncology, Tianjin Union Medical Center, Nankai University, No.190 Jieyuan Road, Hongqiao District, Tianjin, 300121, P. R. China
| | - Xipeng Zhang
- Department of Colorectal Surgery, Tianjin Union Medical Center, Nankai University, Tianjin, P. R. China
| | - Shiwu Zhang
- Department of Pathology, Tianjin Union Medical Center, Nankai University, Tianjin, P. R. China
| | - Hui Wang
- Department of Oncology, Tianjin Union Medical Center, Nankai University, No.190 Jieyuan Road, Hongqiao District, Tianjin, 300121, P. R. China.
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2
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Lee GK, Kim HY, Park JH. Inhibiting eukaryotic initiation factor 5A (eIF5A) hypusination attenuated activation of the SIK2 (salt-inducible kinase 2)-p4E-BP1 pathway involved in ovarian cancer cell proliferation and migration. Mol Biol Rep 2023:10.1007/s11033-023-08510-5. [PMID: 37219665 DOI: 10.1007/s11033-023-08510-5] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 05/09/2023] [Indexed: 05/24/2023]
Abstract
BACKGROUND Eukaryotic initiation factor 5A hypusine (eIF5AHyp) stimulates the translation of proline repeat motifs. Salt inducible kinase 2 (SIK2) containing a proline repeat motif is overexpressed in ovarian cancers, in which it promotes cell proliferation, migration, and invasion. METHODS AND RESULTS Western blotting and dual luciferase analyses showed that depletion of eIF5AHyp by GC7 or eIF5A-targeting siRNA downregulated SIK2 level and decreased luciferase activity in cells transfected with a luciferase-based reporter construct containing consecutive proline residues, whereas the activity of the mutant control reporter construct (replacing P825L, P828H, and P831Q) did not change. According to the MTT assay, GC7, which has a potential antiproliferative effect, reduced the viability of several ovarian cancer cell lines by 20-35% at high concentrations (ES2 > CAOV-3 > OVCAR-3 > TOV-112D) but not at low concentrations. In a pull-down assay, we identified eukaryotic translation initiation factor 4E-binding protein 1 (4E-BP1) and 4E-BP1 (p4E-BP1) phosphorylated at Ser 65 as downstream binding partners of SIK2, and we validated that the level of p4E-BP1(Ser 65) was downregulated by SIK2-targeting siRNA. Conversely, in ES2 cells overexpressing SIK2, the p4E-BP1(Ser 65) level was increased but decreased in the presence of GC7 or eIF5A-targeting siRNA. Finally, the migration, clonogenicity, and viability of ES2 ovarian cancer cells were reduced by GC7 treatment as well as by siRNA for eIF5A gene silencing and siRNA for SIK2 and 4E-BP1 gene silencing. Conversely, those activities were increased in cells overexpressing SIK2 or 4E-BP1 and decreased again in the presence of GC7. CONCLUSION The depletion of eIF5AHyp by GC7 or eIF5A-targeting siRNA attenuated activation of the SIK2-p4EBP1 pathway. In that way, eIF5AHyp depletion reduces the migration, clonogenicity, and viability of ES2 ovarian cancer cells.
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Affiliation(s)
- Grace Kelly Lee
- Chingchai Wanidworanun, MD PLLC, 4001 9th St N Suite 228, Arlington, VA, 22203, USA
| | - Hae-Yeong Kim
- Institute of Life Science and Resources and Department of Food Science and Biotechnology, Kyung Hee University, Yongin, 17104, South Korea.
| | - Jong Hwan Park
- Research Institute of Medical Science, School of Medicine, KonKuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul, 05029, South Korea.
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3
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Deng H, Chen Y, Li P, Hang Q, Zhang P, Jin Y, Chen M. PI3K/AKT/mTOR pathway, hypoxia, and glucose metabolism: Potential targets to overcome radioresistance in small cell lung cancer. Cancer Pathog Ther 2023; 1:56-66. [PMID: 38328610 PMCID: PMC10846321 DOI: 10.1016/j.cpt.2022.09.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 09/02/2022] [Accepted: 09/25/2022] [Indexed: 02/09/2024]
Abstract
Small cell lung cancer (SCLC) is a highly aggressive tumor type for which limited therapeutic progress has been made. Platinum-based chemotherapy with or without thoracic radiotherapy remains the backbone of treatment, but most patients with SCLC acquire therapeutic resistance. Given the need for more effective therapies, better elucidation of the molecular pathogenesis of SCLC is imperative. The phosphoinositide 3-kinase (PI3K)/protein kinase B (AKT)/mammalian target of rapamycin (mTOR) pathway is frequently activated in SCLC and strongly associated with resistance to ionizing radiation in many solid tumors. This pathway is an important regulator of cancer cell glucose metabolism, and its activation probably effects radioresistance by influencing bioenergetic processes in SCLC. Glucose metabolism has three main branches-aerobic glycolysis, oxidative phosphorylation, and the pentose phosphate pathway-involved in radioresistance. The interaction between the PI3K/AKT/mTOR pathway and glucose metabolism is largely mediated by hypoxia-inducible factor 1 (HIF-1) signaling. The PI3K/AKT/mTOR pathway also influences glucose metabolism through other mechanisms to participate in radioresistance, including inhibiting the ubiquitination of rate-limiting enzymes of the pentose phosphate pathway. This review summarizes our understanding of links among the PI3K/AKT/mTOR pathway, hypoxia, and glucose metabolism in SCLC radioresistance and highlights promising research directions to promote cancer cell death and improve the clinical outcome of patients with this devastating disease.
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Affiliation(s)
- Huan Deng
- Department of Medical Oncology, The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, Zhejiang 310022, China
- Department of Radiation Oncology, Zhejiang Key Laboratory of Radiation Oncology, Hangzhou, Zhejiang 310022, China
- Department of Radiation Oncology, Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
- College of Life Sciences, University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Yamei Chen
- Department of Medical Oncology, The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, Zhejiang 310022, China
- Department of Radiation Oncology, Zhejiang Key Laboratory of Radiation Oncology, Hangzhou, Zhejiang 310022, China
- Department of Radiation Oncology, Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
| | - Peijing Li
- Department of Medical Oncology, The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, Zhejiang 310022, China
- Department of Radiation Oncology, Zhejiang Key Laboratory of Radiation Oncology, Hangzhou, Zhejiang 310022, China
- Department of Radiation Oncology, Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
| | - Qingqing Hang
- Department of Medical Oncology, The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, Zhejiang 310022, China
- Department of Radiation Oncology, Zhejiang Key Laboratory of Radiation Oncology, Hangzhou, Zhejiang 310022, China
- Department of Radiation Oncology, Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
| | - Peng Zhang
- Department of Medical Oncology, The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, Zhejiang 310022, China
- Department of Radiation Oncology, Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
| | - Ying Jin
- Department of Medical Oncology, The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou, Zhejiang 310022, China
- Department of Radiation Oncology, Zhejiang Key Laboratory of Radiation Oncology, Hangzhou, Zhejiang 310022, China
- Department of Radiation Oncology, Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
| | - Ming Chen
- Department of Radiation Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University, Guangzhou, Guangdong 510060, China
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4
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Yu C, Zhang X, Wang J, Song H, Liu W, Luo B. Molecular mechanism of aquaporin 3 (AQP3) regulating by LMP2A and its crosstalk with 4E-BP1 via ERK signaling pathway in EBV-associated gastric cancer. Virus Res 2022; 322:198947. [PMID: 36181978 DOI: 10.1016/j.virusres.2022.198947] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 09/26/2022] [Accepted: 09/26/2022] [Indexed: 12/24/2022]
Abstract
Aquaporin 3(AQP3) is involved in epithelial-mesenchymal transformation of tumor cells and is closely related to the occurrence and development of tumors. However, the regulatory mechanism and function of AQP3 in EBV-associated gastric cancer (EBVaGC) are still poorly understood. This study aims to explore the regulatory effect of EBV on AQP3 and the cross talk of AQP3 with EIF4E-binding proteins 1(4E-BP1) in EBVaGC. The effect of LMP2A on the expression of AQP3 and 4E-BP1 was analyzed using real-time PCR and western blotting. The biological functions of AQP3 and 4E-BP1 in gastric cancer cells were detected by cell biological experiments. In addition, we examined the role of mTOR and ERK signaling pathways in the LMP2A/AQP3/4E-BP1 regulatory axis. We found that LMP2A could down-regulate AQP3 expression by inhibiting the activation of mTOR signaling pathway, and further promote autophagy and migration of gastric cancer cells. AQP3 up-regulated the expression of 4E-BP1 and its phosphorylated protein by activating ERK signaling pathway, thus promoting the autophagy and proliferation of gastric cancer cells. In conclusion, EBV-encoded LMP2A inhibits AQP3 expression, and further participates in cell proliferation, migration and autophagy through the mTOR/AQP3/ERK/4E-BP1 axis.
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Affiliation(s)
- Caixia Yu
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, No.308 Ningxia Road, Qingdao 266071, China
| | - Xing Zhang
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, No.308 Ningxia Road, Qingdao 266071, China
| | - Jiayi Wang
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, No.308 Ningxia Road, Qingdao 266071, China; Institute of Virology, Hannover Medical School, Hanover, Germany
| | - Hui Song
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, No.308 Ningxia Road, Qingdao 266071, China; Department of Clinical Laboratory, Qingdao Women and Children's Hospital, Qingdao University, No. 6 Tongfu Road, Qingdao 266034, China
| | - Wen Liu
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, No.308 Ningxia Road, Qingdao 266071, China.
| | - Bing Luo
- Department of Pathogenic Biology, School of Basic Medicine, Qingdao University, No.308 Ningxia Road, Qingdao 266071, China.
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5
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Tang Y, Luo J, Yang Y, Liu S, Zheng H, Zhan Y, Fan S, Wen Q. Overexpression of p-4EBP1 associates with p-eIF4E and predicts poor prognosis for non-small cell lung cancer patients with resection. PLoS One 2022; 17:e0265465. [PMID: 35737644 PMCID: PMC9223369 DOI: 10.1371/journal.pone.0265465] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 03/01/2022] [Indexed: 12/09/2022] Open
Abstract
Eukaryotic initiation factor 4E (eIF4E) and its phosphorylated form (p-eIF4E) play a crucial role in the protein synthesis, both are under regulation of eIF4E-binding protein 1 (4EBP1) and mitogen-activated protein kinase (MAPK)-interacting kinases (MNKs). This study aims to explore the potential prognostic significance of p-4EBP1 and p-eIF4E in NSCLC patients. The expression of p-4EBP1 and p-eIF4E in NSCLC patients was detected by immunohistochemistry (IHC) staining in tissue microarrays (TMAs) containing 354 NSCLC and 53 non-cancerous lung tissues (Non-CLT). The overexpression percentage of p-4EBP1 and p-eIF4E in lung squamous cell carcinoma (SCC) and adenocarcinoma (ADC) was significantly higher than that of Non-CLT. P-4EBP1 expression in patients with advanced clinical stage was higher than that in early stage. Expression of p-4EBP1 had a positive relationship with p-eIF4E expression both in lung SCC and ADC. NSCLC patients with high expression of p-4EBP1 and p-eIF4E alone or in combination had a lower survival rate than that of other phenotypes. For NSCLC patients, p-4EBP1 is an independent poor prognostic factor as well as clinical stage, LNM and pathological grade. Overexpression of p-4EBP1 and p-eIF4E might be novel prognostic marker for NSCLC, who possesses potential application value for NSCLC targeted therapy.
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Affiliation(s)
- Yaoxiang Tang
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jiadi Luo
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yang Yang
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Sile Liu
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Hongmei Zheng
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yuting Zhan
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Songqing Fan
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Qiuyuan Wen
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
- * E-mail:
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6
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Abstract
Lung cancer accounts for a large proportion of cancer-related deaths worldwide. Personalized therapeutic medicine based on the genetic characteristics of non-small cell lung cancer (NSCLC) is a promising field, and discovering clinically applicable biomarkers of NSCLC is required. LINC00472 is a long non-coding RNA and has been recently suggested to be a biomarker of NSCLC, but little is known of its mechanism in NSCLC. Thus, the current study was performed to document changes in gene expression after LINC00472 overexpression in NSCLC cells. As a result of cell viability and migration assay, LINC00472 downregulated cell survival, proliferation, and motility. Transcriptome sequencing analysis showed 3,782 genes expression were changed in LINC00472 overexpressing cells. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis showed most genes were associated with intracellular metabolism. The PPP1R12B, RGS5, RBM5, RBL2, LDLR and PTPRM genes were upregulated by LINC00472 overexpression and these genes functioned as tumor suppressors in several cancers. In contrast, SPSB1, PCNA, CD24, CDK5, CDC25A, and EIF4EBP1 were downregulated by LINC00472, and they functioned as oncogenes in various cancers. Consequently, the function of LINC00472 in tumorigenesis might be related to changes in the expressions of other oncogenes and tumor suppressors.
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Affiliation(s)
- Danbi Seo
- Department of Science Education, Korea National University of Education, Cheongju-si, Chungbuk, Republic of Korea.,Department of Science Education, Korea National University of Education, Cheongju-si, Chungbuk, Republic of Korea
| | - Jungwook Roh
- Department of Science Education, Korea National University of Education, Cheongju-si, Chungbuk, Republic of Korea.,Department of Science Education, Korea National University of Education, Cheongju-si, Chungbuk, Republic of Korea
| | - Yeonsoo Chae
- Department of Science Education, Korea National University of Education, Cheongju-si, Chungbuk, Republic of Korea
| | - Wanyeon Kim
- Department of Science Education, Korea National University of Education, Cheongju-si, Chungbuk, Republic of Korea.,Department of Biology Education, Korea National University of Education, Cheongju-si, Chungbuk, Republic of Korea
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7
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Cao P, Liu B, Du F, Li D, Wang Y, Yan X, Li X, Li Y. Scutellarin suppresses proliferation and promotes apoptosis in A549 lung adenocarcinoma cells via AKT/mTOR/4EBP1 and STAT3 pathways. Thorac Cancer 2019; 10:492-500. [PMID: 30666790 PMCID: PMC6397905 DOI: 10.1111/1759-7714.12962] [Citation(s) in RCA: 20] [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: 10/16/2018] [Revised: 12/08/2018] [Accepted: 12/10/2018] [Indexed: 12/25/2022] Open
Abstract
Background Scutellarin (SCU), a flavonoid isolated from Erigeron breviscapus (Vant.) Hand.‐Mazz., increases autophagy and apoptosis in the adenocarcinoma A549 cell line, which is resistant to cisplatin. However, whether SCU alone has antitumor activity against non‐small cell lung cancer (NSCLC) is unknown. Methods Cell Counting Kit‐8, flow cytometry, colony formation, Hoechst 33258 staining, and Western blot analyses were used to examine the proliferation and apoptosis of A549 cells treated with SCU and the possible molecular mechanisms. Results The cell viability assay indicated that SCU markedly suppressed the proliferation of A549 cells in concentration and time‐dependent manners. SCU caused significant G0/G1 phase arrest and apoptosis, as evidenced by flow cytometric analyses, Hoechst 33258 staining, and Western blot analyses of cyclin D1, cyclin E, BCL‐2, cleaved‐caspase‐3, and BAX. Furthermore, SCU treatment reduced the level of pan‐AKT, phosphorylated (p)‐mTOR, mTOR, BCL‐XL, STAT3, and p‐STAT3, and increased the level of 4EBP1. Conclusions SCU can suppress proliferation and promote apoptosis in A549 cells through AKT/mTOR/4EBP1 and STAT3 pathways. This suggests that SCU may be developed into a promising antitumor agent for treating NSCLC.
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Affiliation(s)
- Pikun Cao
- Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Bin Liu
- Department of Interventional Medicine, The Second Hospital of Shandong University, Jinan, China.,Interventional Oncology Institute of Shandong University, Jinan, China
| | - Feng Du
- Department of Radiology, Pingyin County Hospital of Traditional Chinese Medicine, Jinan, China
| | - Dong Li
- Department of Interventional Medicine, The Second Hospital of Shandong University, Jinan, China.,Interventional Oncology Institute of Shandong University, Jinan, China
| | - Yongzheng Wang
- Department of Interventional Medicine, The Second Hospital of Shandong University, Jinan, China.,Interventional Oncology Institute of Shandong University, Jinan, China
| | - Xiaoyan Yan
- Department of Radiology, Pingyin County Hospital of Traditional Chinese Medicine, Jinan, China
| | - Xiao Li
- Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yuliang Li
- Department of Interventional Medicine, The Second Hospital of Shandong University, Jinan, China.,Interventional Oncology Institute of Shandong University, Jinan, China
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8
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Ramon Y Cajal S, Castellvi J, Hümmer S, Peg V, Pelletier J, Sonenberg N. Beyond molecular tumor heterogeneity: protein synthesis takes control. Oncogene 2018; 37:2490-2501. [PMID: 29463861 PMCID: PMC5945578 DOI: 10.1038/s41388-018-0152-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [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: 10/02/2017] [Revised: 12/15/2017] [Accepted: 01/02/2018] [Indexed: 01/04/2023]
Abstract
One of the daunting challenges facing modern medicine lies in the understanding and treatment of tumor heterogeneity. Most tumors show intra-tumor heterogeneity at both genomic and proteomic levels, with marked impacts on the responses of therapeutic targets. Therapeutic target-related gene expression pathways are affected by hypoxia and cellular stress. However, the finding that targets such as eukaryotic initiation factor (eIF) 4E (and its phosphorylated form, p-eIF4E) are generally homogenously expressed throughout tumors, regardless of the presence of hypoxia or other cellular stress conditions, opens the exciting possibility that malignancies could be treated with therapies that combine targeting of eIF4E phosphorylation with immune checkpoint inhibitors or chemotherapy.
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Affiliation(s)
- Santiago Ramon Y Cajal
- Translational Molecular Pathology, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Passeig Vall d'Hebron 119-129, 08035, Barcelona, Spain. .,Pathology Department, Vall d'Hebron Hospital, 08035, Barcelona, Spain. .,Spanish Biomedical Research Network Centre in Oncology (CIBERONC), Madrid, Spain.
| | - Josep Castellvi
- Translational Molecular Pathology, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Passeig Vall d'Hebron 119-129, 08035, Barcelona, Spain.,Pathology Department, Vall d'Hebron Hospital, 08035, Barcelona, Spain.,Spanish Biomedical Research Network Centre in Oncology (CIBERONC), Madrid, Spain
| | - Stefan Hümmer
- Translational Molecular Pathology, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Passeig Vall d'Hebron 119-129, 08035, Barcelona, Spain.,Spanish Biomedical Research Network Centre in Oncology (CIBERONC), Madrid, Spain
| | - Vicente Peg
- Translational Molecular Pathology, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Passeig Vall d'Hebron 119-129, 08035, Barcelona, Spain.,Pathology Department, Vall d'Hebron Hospital, 08035, Barcelona, Spain.,Spanish Biomedical Research Network Centre in Oncology (CIBERONC), Madrid, Spain
| | - Jerry Pelletier
- Department of Biochemistry and Goodman Cancer Research Center, McGill University, Montreal, QC, Canada
| | - Nahum Sonenberg
- Department of Biochemistry and Goodman Cancer Research Center, McGill University, Montreal, QC, Canada
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9
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Elia A, Henry-Grant R, Adiseshiah C, Marboeuf C, Buckley RJ, Clemens MJ, Mudan S, Pyronnet S. Implication of 4E-BP1 protein dephosphorylation and accumulation in pancreatic cancer cell death induced by combined gemcitabine and TRAIL. Cell Death Dis 2017; 8:3204. [PMID: 29233971 DOI: 10.1038/s41419-017-0001-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Revised: 09/22/2017] [Accepted: 09/25/2017] [Indexed: 12/19/2022]
Abstract
Pancreatic cancer cells show varying sensitivity to the anticancer effects of gemcitabine. However, as a chemotherapeutic agent, gemcitabine can cause intolerably high levels of toxicity and patients often develop resistance to the beneficial effects of this drug. Combination studies show that use of gemcitabine with the pro-apoptotic cytokine TRAIL can enhance the inhibition of survival and induction of apoptosis of pancreatic cancer cells. Additionally, following combination treatment there is a dramatic increase in the level of the hypophosphorylated form of the tumour suppressor protein 4E-BP1. This is associated with inhibition of mTOR activity, resulting from caspase-mediated cleavage of the Raptor and Rictor components of mTOR. Use of the pan-caspase inhibitor Z-VAD-FMK indicates that the increase in level of 4E-BP1 is also caspase-mediated. ShRNA-silencing of 4E-BP1 expression renders cells more resistant to cell death induced by the combination treatment. Since the levels of 4E-BP1 are relatively low in untreated pancreatic cancer cells these results suggest that combined therapy with gemcitabine and TRAIL could improve the responsiveness of tumours to treatment by elevating the expression of 4E-BP1.
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10
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Zhang T, Guo J, Li H, Wang J. Meta-analysis of the prognostic value of p-4EBP1 in human malignancies. Oncotarget 2018; 9:2761-9. [PMID: 29416809 DOI: 10.18632/oncotarget.23031] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [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: 07/02/2017] [Accepted: 09/20/2017] [Indexed: 01/16/2023] Open
Abstract
Phosphorylated 4E-binding protein 1 (p-4EBP1) is the inactivated form of 4EBP1, which is a downstream mediator in the mTOR signaling pathway and a vital factor in the synthesis of some oncogenic proteins. This meta-analysis was conducted to assess the predicative value of p-4EBP1 expression in human malignancies. The PubMed and Embase databases were carefully searched. Articles comparing the prognostic worthiness of different p-4EBP1 levels in human malignancies were collected for pooled analyses and methodologically appraised using the Newcastle-Ottawa Scale (NOS). A total of 39 retrospective cohorts with an overall sample size of 3,980 were selected. Patients with lower p-4EBP1 expression had better 3-year (P < 0.00001), 5-year (P < 0.00001), and 10-year (P = 0.03) overall survival and better 3-year (P < 0.0001) and 5-year (P = 0.0005) disease-free survival. Subgroup analyses confirmed the unfavorable prognosis associated with p-4EBP1 overexpression. These findings were further validated by sensitivity analyses. Harbord and Peters tests revealed no publication bias within the included studies. It thus appears higher expression of p-4EBP1 indicates a poor prognosis in human malignancies.
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11
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Chu J, Ramon Y Cajal S, Sonenberg N, Pelletier J. Eukaryotic initiation factor 4F-sidestepping resistance mechanisms arising from expression heterogeneity. Curr Opin Genet Dev 2017; 48:89-96. [PMID: 29169064 DOI: 10.1016/j.gde.2017.11.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 11/01/2017] [Accepted: 11/03/2017] [Indexed: 12/31/2022]
Abstract
There is enormous diversity in the genetic makeup and gene expression profiles between and within tumors. This heterogeneity leads to phenotypic variation and is a major mechanism of resistance to molecular targeted therapies. Here we describe a conceptual framework for targeting eukaryotic initiation factor (eIF) 4F in cancer-an essential complex that drives and promotes multiple Cancer Hallmarks. The unique nature of eIF4F and its druggability bypasses several of the heterogeneity issues that plague molecular targeted drugs developed for cancer therapy.
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Affiliation(s)
- Jennifer Chu
- Departments of Biochemistry and Oncology, McGill University, Montreal, Quebec, Canada
| | - Santiago Ramon Y Cajal
- Pathology Department, Vall d'Hebron Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain; Spanish Biomedical Research Network Centre in Oncology (CIBERONC), Spain
| | - Nahum Sonenberg
- Departments of Biochemistry and Oncology, McGill University, Montreal, Quebec, Canada; Goodman Cancer Research Center, McGill University, Montreal, Quebec, Canada
| | - Jerry Pelletier
- Departments of Biochemistry and Oncology, McGill University, Montreal, Quebec, Canada; Goodman Cancer Research Center, McGill University, Montreal, Quebec, Canada.
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12
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Hao L, Du B, Xi X. TRIM59 is a novel potential prognostic biomarker in patients with non-small cell lung cancer: A research based on bioinformatics analysis. Oncol Lett 2017; 14:2153-2164. [PMID: 28789440 PMCID: PMC5530082 DOI: 10.3892/ol.2017.6467] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [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: 12/08/2016] [Accepted: 06/14/2017] [Indexed: 12/28/2022] Open
Abstract
Lung cancer is the leading cause of cancer-associated mortality worldwide and its prognosis is poor. Few effective biomarkers for non-small cell lung cancer (NSCLC) have been translated into the clinical practice aiming to assist in the treatment plan design and prognosis evaluation. The aim of the present study was to identify novel potential prognostic biomarkers for NSCLC. Tripartite motif 59 (TRIM59) was identified from a microarray dataset of matched-samples and was verified as an aberrantly upregulated gene in NSCLC tissue. The expression level of TRIM59 in NSCLC subtypes was observed to be significantly increased in large cell lung carcinoma and squamous cell carcinoma as compared with that in adenocarcinoma. Its expression correlated with several clinicopathological features, including gender, smoking habits, and unfavorable tumor node and pathological stages. Notably, TRIM59 demonstrated a negative correlation with survival time and its overexpression indicated a poor prognosis in NSCLC. Furthermore, univariate and multivariate Cox's regression analyses indicated that TRIM59 was an independent prognostic factor in tumor tissue as compared with age, gender, tumor stage, node stage, and metastasis. Gene set enrichment analysis and protein-protein interaction network construction revealed that TRIM59 was associated with oncogenic mammalian target of rapamycin (MTOR) and eukaryotic initiation factor 4E (EIF4E) signaling through ubiquitin C binding. In conclusion, it was revealed that TRIM59 is a novel prognostic biomarker modulating oncogenic MTOR and EIF4E signaling pathways in NSCLC. These findings provided a novel insight into the clinical application of TRIM59. Therefore, TRIM59 may serve as an independent predictor for prognosis and a potential therapeutic target for NSCLC.
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Affiliation(s)
- Ling Hao
- School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Boyu Du
- School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
| | - Xueyan Xi
- School of Basic Medical Sciences, Hubei University of Medicine, Shiyan, Hubei 442000, P.R. China
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13
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Chen YT, Tsai HP, Wu CC, Wang JY, Chai CY. Eukaryotic translation initiation factor 4E (eIF-4E) expressions are associated with poor prognosis in colorectal adenocarcinoma. Pathol Res Pract 2017; 213:490-495. [PMID: 28242042 DOI: 10.1016/j.prp.2017.02.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 02/04/2017] [Accepted: 02/05/2017] [Indexed: 10/20/2022]
Abstract
Both phosphorylated 4E binding protein 1 (p-4E-BP1) and eukaryotic translation initiation factor 4E (eIF-4E) play an important role in cancer progression. The aim of this study is to evaluate the expression of p-4E-BP1 and eIF-4E in human colorectal cancer (CRC) and to assess their clinical significance. Expression levels of two markers were analyzed in surgical specimens from 116 CRC cases by immunohistochemical staining. Their clinical significance as well as the two proteins' correlation was also investigated. Western blot was also used to detect the protein expressions in CRC cell lines. High p-4E-BP1 expression was significantly associated with lymphovascular invasion (LVI) (p=0.003), perineural invasion (PNI) (p=0.001), tumor stage (p=0.024), nodal stage (p=0.000), metastatic status (p=0.027), and disease stage (p=0.001). High eIF-4E expression had significant correlations with LVI (p=0.001), PNI (p=0.008), nodal stage (p=0.018), metastatic status (p=0.024) and disease stage (p=0.030). Pearson correlation calculations showed a weakly positive correlation between p-4E-BP1 and eIF-4E immunoreactivity (p=0.037). Patients with low eIF-4E expressions tended to have significantly longer overall survival (p=0.039). Western blot analysis showed higher expression of p-4E-BP1 and eIF-4E proteins in CRC cell lines compared with normal colon tissue. In conclusions, high expressions of eIF-4E are associated with advanced stage and poor prognosis. These data suggest that eIF-4E may provide a helpful therapeutic target in treatment of CRC.
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Affiliation(s)
- Yi-Ting Chen
- Department of Pathology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hung-Pei Tsai
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chun-Chieh Wu
- Department of Pathology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Jaw-Yuan Wang
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Surgery, Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung, Taiwan; Department of Surgery, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Division of Gastroenterology and General Surgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Taiwan; Graduate Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Center for Biomarkers and Biotech Drugs, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chee-Yin Chai
- Department of Pathology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Pathology, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Institute of Biomedical Sciences, National Sun Yat-Sen University, Kaohsiung, Taiwan.
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Martínez-Sáez E, Peg V, Ortega-Aznar A, Martínez-Ricarte F, Camacho J, Hernández-Losa J, Ferreres Piñas JC, Ramón Y Cajal S. peIF4E as an independent prognostic factor and a potential therapeutic target in diffuse infiltrating astrocytomas. Cancer Med 2016; 5:2501-12. [PMID: 27440383 PMCID: PMC5055163 DOI: 10.1002/cam4.817] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [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: 03/14/2016] [Revised: 06/07/2016] [Accepted: 06/13/2016] [Indexed: 12/19/2022] Open
Abstract
Malignant transformation in tumors is a complex process requiring accumulation of numerous oncogenic abnormalities. Brain tumors show considerable phenotypic and genetic heterogeneity. In a series comprising diffuse infiltrating astrocytomas (DIA) and reactive gliosis, we investigated the main factors associated with signaling pathways. We assessed expression levels and their association with tumor progression and survival. We studied 19 grade II astrocytomas, 25 anaplastic astrocytomas (grade III), 60 glioblastomas (grade IV), and 15 cases of reactive gliosis. Epidermal growth factor receptor (EGFR), pMAPK, 4E‐BP1, p4E‐BP1, pS6, eIF4E, and peIF4E expression levels were evaluated using immunohistochemistry. Expression levels were semiquantitatively evaluated using a histoscore. Immunohistochemistry and PCR were used for IDH1 mutations. Statistical analysis was based on the following tests: chi‐square, Student's t, Pearson correlation, Spearman's rho, and Mann–Whitney; ROC and Kaplan–Meier curves were constructed. A significant increase was observed between grades for expression of total and phosphorylated 4E‐BP1 and for eIF4E, Ki67, EGFR, and cyclin D1. Although expression of EGFR, eIF4E, and Ki67 correlated with survival, only peIF4E was an independent predictor of survival in the multivariate analysis. Combining the evaluation of different proteins enables us to generate helpful diagnostic nomograms. In conclusion, cell signaling pathways are activated in DIAs; peIF4E is an independent prognostic factor and a promising therapeutic target. Joint analysis of the expression of 4E‐BP1 and peIF4E could be helpful in the diagnosis of glioblastoma multiforme in small biopsy samples.
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Affiliation(s)
- Elena Martínez-Sáez
- Department of Pathology, Vall d'Hebron University Hospital, Barcelona, Spain. .,Department of Morphological Sciences, Universitat Autònoma de Barcelona, Barcelona, Spain.
| | - Vicente Peg
- Department of Pathology, Vall d'Hebron University Hospital, Barcelona, Spain.,Department of Morphological Sciences, Universitat Autònoma de Barcelona, Barcelona, Spain
| | | | | | - Jessica Camacho
- Department of Pathology, Vall d'Hebron University Hospital, Barcelona, Spain.,Department of Morphological Sciences, Universitat Autònoma de Barcelona, Barcelona, Spain
| | | | | | - Santiago Ramón Y Cajal
- Department of Pathology, Vall d'Hebron University Hospital, Barcelona, Spain. .,Department of Morphological Sciences, Universitat Autònoma de Barcelona, Barcelona, Spain.
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Li J, Huang Y, Gao Y, Wu H, Dong W, Liu L. Antibiotic drug rifabutin is effective against lung cancer cells by targeting the eIF4E-β-catenin axis. Biochem Biophys Res Commun 2016; 472:299-305. [DOI: 10.1016/j.bbrc.2016.02.120] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 02/29/2016] [Indexed: 12/20/2022]
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16
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Musa J, Orth MF, Dallmayer M, Baldauf M, Pardo C, Rotblat B, Kirchner T, Leprivier G, Grünewald TGP. Eukaryotic initiation factor 4E-binding protein 1 (4E-BP1): a master regulator of mRNA translation involved in tumorigenesis. Oncogene 2016; 35:4675-88. [DOI: 10.1038/onc.2015.515] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 12/11/2015] [Accepted: 12/11/2015] [Indexed: 01/17/2023]
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