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Song P, Li Y, Zhang M, Lyu B, Cui Y, Gao S. Comprehensive Analysis of a Dendritic Cell Marker Genes Signature to Predict Prognosis and Immunotherapy Response in Lung Adenocarcinoma. J Immunother 2024:00002371-990000000-00101. [PMID: 38679823 DOI: 10.1097/cji.0000000000000521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 03/12/2024] [Indexed: 05/01/2024]
Abstract
With the development of immune checkpoints inhibitors (ICIs), immunotherapy has recently taken center stage in cancer treatment. Dendritic cells exert complicated and important functions in antitumor immunity. This study aims to construct a novel dendritic cell marker gene signature (DCMGS) to predict the prognosis and immunotherapy response of lung adenocarcinoma (LUAD). DC marker genes in LUAD were identified by analysis of single-cell RNA sequencing data. 6 genes (G0S2, KLF4, ALDH2, IER3, TXN, CD69) were screened as the most prognosis-related genes for constructing DCMGS on a training cohort from TCGA data set. Patients were divided into high-risk and low-risk groups by DCMGS risk score based on overall survival time. Then, the predictive ability of the risk model was validated in 6 independent cohorts. DCMGS was verified to be an independent prognostic factor in multivariate analysis. Furthermore, we performed pathway enrichment analysis to explore possible biological mechanisms of the powerful predictive ability of DCMGS, and immune cell infiltration landscape and inflammatory activities were exhibited to reflect the immune profile. Notably, we bridged DCMGS with expression of immune checkpoints and TCR/BCR repertoire diversity that can inflect immunotherapy response. Finally, the predictive ability of DCMGS in immunotherapy response was also validated by 2 cohorts that had received immunotherapy. As a result, the patients with lower DCMGS risk scores showed a better prognosis and immunotherapy response. In conclusion, DCMGS was suggested to be a promising prognostic indicator for LUAD and a desirable predictor for immunotherapy response.
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Affiliation(s)
- Peng Song
- Department of Thoracic Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Yuan Li
- Department of Thoracic Surgery, National Cancer Center/ National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Moyan Zhang
- Department of Thoracic Surgery, National Cancer Center/ National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Baihan Lyu
- CAS Key Laboratory of Behavioral Science, Institute of Psychology, Chinese Academy of Sciences, Beijing, China
| | - Yong Cui
- Department of Thoracic Surgery, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Shugeng Gao
- Department of Thoracic Surgery, National Cancer Center/ National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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2
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Long F, Zhou X, Zhang J, Di C, Li X, Ye H, Pan J, Si J. The role of lncRNA HCG18 in human diseases. Cell Biochem Funct 2024; 42:e3961. [PMID: 38425124 DOI: 10.1002/cbf.3961] [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: 11/23/2023] [Revised: 01/29/2024] [Accepted: 02/16/2024] [Indexed: 03/02/2024]
Abstract
A substantial number of long noncoding RNAs (lncRNAs) have been identified as potent regulators of human disease. Human leukocyte antigen complex group 18 (HCG18) is a new type of lncRNA that has recently been proven to play an important role in the occurrence and development of various diseases. Studies have found that abnormal expression of HCG18 is closely related to the clinicopathological characteristics of many diseases. More importantly, HCG18 was also found to promote disease progression by affecting a series of cell biological processes. This article mainly discusses the expression characteristics, clinical characteristics, biological effects and related regulatory mechanisms of HCG18 in different human diseases, providing a scientific theoretical basis for its early clinical application.
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Affiliation(s)
- Feng Long
- Key Laboratory of TCM Prevention and Treatment of Chronic Diseases, School of Basic Medicine, Gansu University of Chinese Medicine, Lanzhou, China
| | - Xuan Zhou
- Key Laboratory of TCM Prevention and Treatment of Chronic Diseases, School of Basic Medicine, Gansu University of Chinese Medicine, Lanzhou, China
| | - Jinhua Zhang
- Department of Medical Physics, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Cuixia Di
- Department of Medical Physics, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Xue Li
- Key Laboratory of TCM Prevention and Treatment of Chronic Diseases, School of Basic Medicine, Gansu University of Chinese Medicine, Lanzhou, China
| | - Hailin Ye
- Key Laboratory of TCM Prevention and Treatment of Chronic Diseases, School of Basic Medicine, Gansu University of Chinese Medicine, Lanzhou, China
| | - Jingyu Pan
- Key Laboratory of TCM Prevention and Treatment of Chronic Diseases, School of Basic Medicine, Gansu University of Chinese Medicine, Lanzhou, China
| | - Jing Si
- Department of Medical Physics, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
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3
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Zhang X, Wang W, Lu C, Zhang H. KLF4 suppresses the proliferation of perihilar cholangiocarcinoma by negatively regulating GDF15 and phosphorylating AKT. Oncol Rep 2023; 50:222. [PMID: 37937607 PMCID: PMC10652240 DOI: 10.3892/or.2023.8659] [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: 10/30/2022] [Accepted: 06/07/2023] [Indexed: 11/09/2023] Open
Abstract
Krüppel‑like factor 4 (KLF4) is a transcription factor which functions as a tumor suppressor or an oncogene in numerous types of solid tumors. However, its expression levels and function in perihilar cholangiocarcinoma (pCCA) have yet to be elucidated. In the present study, in order to investigate its roles in pCCA, reverse transcription‑quantitative PCR (RT‑qPCR), western blot analysis and immunohistochemistry were used to detect KLF4 expression in pCCA. The Chi‑squared test was used to analyze the associations between KLF4 and the clinicopathological features of patients with pCCA. Univariate and multivariate analyses were subsequently used to analyze the prognostic significance of KLF4. The tumor suppression of KLF4 was investigated for the purposes of illustrating its biological function both in vitro and in vivo. Furthermore, the association between KLF4 and growth/differentiation factor 15 (GDF15) was determined using pCCA tissue microarray (TMA) analysis and RT‑qPCR. The underlying molecular mechanisms between KLF4 and GDF15 were subsequently investigated in vitro. In pCCA tissues, KLF4 was found to be downregulated, and this was negatively associated with the histological grade and tumor size. The knockdown of KLF4 was also found to be a prognostic indicator of the poorer survival of patients with pCCA. Based on in vitro and in vivo analyses, KLF4 was found to suppress tumor progression and induce cell apoptosis. Furthermore, it was found that KLF4 executed its tumor suppressive effects via the regulation of the GDF15/AKT signaling pathway. Taken together, the findings of the present study demonstrate that KLF4 may be considered as an independent biomarker of a favorable prognosis of patients with pCCA, and the KLF4/GDF15/AKT signaling pathway may potentially be a novel molecular therapeutic target for patients with pCCA.
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Affiliation(s)
- Xiaoming Zhang
- General Surgery Center of Linyi People's Hospital, Linyi, Shandong 276000, P.R. China
| | - Weijia Wang
- General Surgery Center of Linyi People's Hospital, Linyi, Shandong 276000, P.R. China
| | - Chunlei Lu
- General Surgery Center of Linyi People's Hospital, Linyi, Shandong 276000, P.R. China
| | - Haifeng Zhang
- General Surgery Center of Linyi People's Hospital, Linyi, Shandong 276000, P.R. China
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4
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Hwang J, Moon H, Kim H, Kim KY. Identification of a Novel ERK5 (MAPK7) Inhibitor, MHJ-627, and Verification of Its Potent Anticancer Efficacy in Cervical Cancer HeLa Cells. Curr Issues Mol Biol 2023; 45:6154-6169. [PMID: 37504304 PMCID: PMC10377775 DOI: 10.3390/cimb45070388] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 07/19/2023] [Accepted: 07/21/2023] [Indexed: 07/29/2023] Open
Abstract
Extracellular signal-regulated kinase 5 (ERK5), a member of the mitogen-activated protein kinase (MAPK) family, is involved in key cellular processes. However, overexpression and upregulation of ERK5 have been reported in various cancers, and ERK5 is associated with almost every biological characteristic of cancer cells. Accordingly, ERK5 has become a novel target for the development of anticancer drugs as inhibition of ERK5 shows suppressive effects of the deleterious properties of cancer cells. Herein, we report the synthesis and identification of a novel ERK5 inhibitor, MHJ-627, and verify its potent anticancer efficacy in a yeast model and the cervical cancer HeLa cell line. MHJ-627 successfully inhibited the kinase activity of ERK5 (IC50: 0.91 μM) and promoted the mRNA expression of tumor suppressors and anti-metastatic genes. Moreover, we observed significant cancer cell death, accompanied by a reduction in mRNA levels of the cell proliferation marker, proliferating cell nuclear antigen (PCNA), following ERK5 inhibition due to MHJ-627 treatment. We expect this finding to serve as a lead compound for further identification of inhibitors for ERK5-directed novel approaches for oncotherapy with increased specificity.
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Affiliation(s)
- Jeonghye Hwang
- Department of Genetics and Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Hyejin Moon
- Department of Applied Chemistry, Global Center for Pharmaceutical Ingredient Materials, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Hakwon Kim
- Department of Applied Chemistry, Global Center for Pharmaceutical Ingredient Materials, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Ki-Young Kim
- Department of Genetics and Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea
- Graduate School of Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea
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5
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Zeng L, Zhu Y, Moreno CS, Wan Y. New insights into KLFs and SOXs in cancer pathogenesis, stemness, and therapy. Semin Cancer Biol 2023; 90:29-44. [PMID: 36806560 PMCID: PMC10023514 DOI: 10.1016/j.semcancer.2023.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 09/04/2022] [Accepted: 02/08/2023] [Indexed: 02/17/2023]
Abstract
Despite the development of cancer therapies, the success of most treatments has been impeded by drug resistance. The crucial role of tumor cell plasticity has emerged recently in cancer progression, cancer stemness and eventually drug resistance. Cell plasticity drives tumor cells to reversibly convert their cell identity, analogous to differentiation and dedifferentiation, to adapt to drug treatment. This phenotypical switch is driven by alteration of the transcriptome. Several pluripotent factors from the KLF and SOX families are closely associated with cancer pathogenesis and have been revealed to regulate tumor cell plasticity. In this review, we particularly summarize recent studies about KLF4, KLF5 and SOX factors in cancer development and evolution, focusing on their roles in cancer initiation, invasion, tumor hierarchy and heterogeneity, and lineage plasticity. In addition, we discuss the various regulation of these transcription factors and related cutting-edge drug development approaches that could be used to drug "undruggable" transcription factors, such as PROTAC and PPI targeting, for targeted cancer therapy. Advanced knowledge could pave the way for the development of novel drugs that target transcriptional regulation and could improve the outcome of cancer therapy.
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Affiliation(s)
- Lidan Zeng
- Department of Pharmacology and Chemical Biology, Department of Hematology and oncology, Winship Cancer Institute, Emory University School of Medicine, USA
| | - Yueming Zhu
- Department of Pharmacology and Chemical Biology, Department of Hematology and oncology, Winship Cancer Institute, Emory University School of Medicine, USA
| | - Carlos S Moreno
- Department of Pathology and Laboratory Medicine, Department of Biomedical Informatics, Winship Cancer Institute, Emory University School of Medicine, USA.
| | - Yong Wan
- Department of Pharmacology and Chemical Biology, Department of Hematology and oncology, Winship Cancer Institute, Emory University School of Medicine, USA.
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6
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He Z, He J, Xie K. KLF4 transcription factor in tumorigenesis. Cell Death Discov 2023; 9:118. [PMID: 37031197 PMCID: PMC10082813 DOI: 10.1038/s41420-023-01416-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 03/22/2023] [Accepted: 03/24/2023] [Indexed: 04/10/2023] Open
Abstract
Krüppel-like transcriptional factor is important in maintaining cellular functions. Deletion of Krüppel-like transcriptional factor usually causes abnormal embryonic development and even embryonic death. KLF4 is a prominent member of this family, and embryonic deletion of KLF4 leads to alterations in skin permeability and postnatal death. In addition to its important role in embryo development, it also plays a critical role in inflammation and malignancy. It has been investigated that KLF4 has a regulatory role in a variety of cancers, including lung, breast, prostate, colorectal, pancreatic, hepatocellular, ovarian, esophageal, bladder and brain cancer. However, the role of KLF4 in tumorigenesis is complex, which may link to its unique structure with both transcriptional activation and transcriptional repression domains, and to the regulation of its upstream and downstream signaling molecules. In this review, we will summarize the structural and functional aspects of KLF4, with a focus on KLF4 as a clinical biomarker and therapeutic target in different types of tumors.
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Affiliation(s)
- Zhihong He
- Center for Pancreatic Cancer Research, The South China University of Technology School of Medicine, Guangzhou, China
- The South China University of Technology Comprehensive Cancer Center, Guangdong, China
| | - Jie He
- The Second Affiliated Hospital and Guangzhou First People's Hospital, South China University of Technology School of Medicine, Guangdong, China
| | - Keping Xie
- Center for Pancreatic Cancer Research, The South China University of Technology School of Medicine, Guangzhou, China.
- The South China University of Technology Comprehensive Cancer Center, Guangdong, China.
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7
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Otálora-Otálora BA, López-Kleine L, Rojas A. Lung Cancer Gene Regulatory Network of Transcription Factors Related to the Hallmarks of Cancer. Curr Issues Mol Biol 2023; 45:434-464. [PMID: 36661515 PMCID: PMC9857713 DOI: 10.3390/cimb45010029] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 12/13/2022] [Accepted: 12/15/2022] [Indexed: 01/06/2023] Open
Abstract
The transcriptomic analysis of microarray and RNA-Seq datasets followed our own bioinformatic pipeline to identify a transcriptional regulatory network of lung cancer. Twenty-six transcription factors are dysregulated and co-expressed in most of the lung cancer and pulmonary arterial hypertension datasets, which makes them the most frequently dysregulated transcription factors. Co-expression, gene regulatory, coregulatory, and transcriptional regulatory networks, along with fibration symmetries, were constructed to identify common connection patterns, alignments, main regulators, and target genes in order to analyze transcription factor complex formation, as well as its synchronized co-expression patterns in every type of lung cancer. The regulatory function of the most frequently dysregulated transcription factors over lung cancer deregulated genes was validated with ChEA3 enrichment analysis. A Kaplan-Meier plotter analysis linked the dysregulation of the top transcription factors with lung cancer patients' survival. Our results indicate that lung cancer has unique and common deregulated genes and transcription factors with pulmonary arterial hypertension, co-expressed and regulated in a coordinated and cooperative manner by the transcriptional regulatory network that might be associated with critical biological processes and signaling pathways related to the acquisition of the hallmarks of cancer, making them potentially relevant tumor biomarkers for lung cancer early diagnosis and targets for the development of personalized therapies against lung cancer.
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Affiliation(s)
- Beatriz Andrea Otálora-Otálora
- Grupo de Investigación INPAC, Unidad de Investigación, Fundación Universitaria Sanitas, Bogotá 110131, Colombia
- Facultad de Medicina, Universidad Nacional de Colombia, Bogotá 11001, Colombia
| | - Liliana López-Kleine
- Departamento de Estadística, Universidad Nacional de Colombia, Bogotá 11001, Colombia
- Correspondence: (L.L.-K.); (A.R.)
| | - Adriana Rojas
- Facultad de Medicina, Instituto de Genética Humana, Pontificia Universidad Javeriana, Bogotá 110211, Colombia
- Correspondence: (L.L.-K.); (A.R.)
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8
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Li Y, Feng R, Yu X, Li L, Liu Y, Zhang R, Chen X, Zhao Y, Liu Z. SLC35E2 promoter mutation as a prognostic marker of esophageal squamous cell carcinoma. Life Sci 2022; 296:120447. [PMID: 35247439 DOI: 10.1016/j.lfs.2022.120447] [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: 11/19/2021] [Revised: 01/29/2022] [Accepted: 02/26/2022] [Indexed: 12/24/2022]
Abstract
AIMS Esophageal squamous cell carcinoma (ESCC) is one of the deadliest digestive tract cancer with poor prognosis. In our previous comprehensive genomics study, we identified that hotspot mutations in the solute carrier family 35 member E2 (SLC35E2) promoter region was significantly associated with worse prognosis in patients with ESCC. However, the biological function and molecular mechanism of SLC35E2 remains unclear. This study was to investigate the malignant function and mechanism of SLC35E2 in ESCC. MAIN METHODS Western blotting and qRT-PCR were used to assess the expression of SLC35E2 in ESCC cell lines. Luciferase assay and chromatin immunoprecipitation (ChIP) assay were used to assess the transcriptional inhibition of KLF4. Incucyte cell proliferation assay, colony formation assay and subcutaneous tumor formation in nude mice were used to assess the malignant function of SLC35E2. KEY FINDINGS SLC35E2 can promote ESCC cell proliferation in vitro and in vivo. Krüppel-like factor 4 (KLF4), a transcriptional repressor in ESCC, binds to the SLC35E2 promoter and represses the expression of SLC35E2. The transcriptional suppression of KLF4 can be blocked by the mutation at -118 site of the SLC35E2 promoter. Besides, the accumulation of SLC35E2 expression contributes to the malignant phenotype of ESCC. SIGNIFICANCE These results indicate that SLC35E2 may be used as a biomarker for prognosis as well as a therapeutic target for patients with ESCC.
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Affiliation(s)
- Yang Li
- State Key Laboratory of Molecular Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Riyue Feng
- State Key Laboratory of Molecular Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Xiao Yu
- State Key Laboratory of Molecular Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Lei Li
- State Key Laboratory of Molecular Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Yuhao Liu
- State Key Laboratory of Molecular Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Ruixiang Zhang
- State Key Laboratory of Molecular Oncology, Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Xiankai Chen
- State Key Laboratory of Molecular Oncology, Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Yahui Zhao
- State Key Laboratory of Molecular Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Zhihua Liu
- State Key Laboratory of Molecular Oncology, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China.
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9
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Expression and Prognosis Value of the KLF Family Members in Colorectal Cancer. JOURNAL OF ONCOLOGY 2022; 2022:6571272. [PMID: 35345512 PMCID: PMC8957442 DOI: 10.1155/2022/6571272] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 01/03/2022] [Accepted: 01/07/2022] [Indexed: 12/17/2022]
Abstract
Krüppel-like factors (KLFs) are some kind of transcriptional regulator that regulates a broad range of cellular functions and has been linked to the development of certain malignancies. KLF expression patterns and prognostic values in colorectal cancer (CRC) have, however, been investigated rarely. To investigate the differential expression, predictive value, and gene mutations of KLFs in CRC patients, we used various online analytic tools, including ONCOMINE, TCGA, cBioPortal, and the TIMER database. KLF2-6, KLF8-10, KLF12-15, and KLF17 mRNA expression levels were dramatically downregulated in CRC tissues, but KLF1, KLF7, and KLF16 mRNA expression levels were significantly elevated in CRC tissues. According to the findings of Cox regression analysis, upregulation of KLF3, KLF5, and KLF6 and downregulation of KLF15 were linked with a better prognosis in CRC. For functional enrichment, our findings revealed that KLF members are involved in a variety of cancer-related biological processes. In colon cancer and rectal cancer, KLFs were also shown to be associated with a variety of immune cells. The findings of this research reveal that KLF family members' mRNA expression levels are possible prognostic indicators for patients with CRC.
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10
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Ma X, Wang L, Shi G, Sun S. The deubiquitinase
OTUD1
inhibits non‐small cell lung cancer progression by deubiquitinating and stabilizing
KLF4. Thorac Cancer 2022; 13:761-770. [PMID: 35098684 PMCID: PMC8888149 DOI: 10.1111/1759-7714.14320] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/02/2022] [Accepted: 01/03/2022] [Indexed: 12/25/2022] Open
Abstract
Background Lung cancer results in the highest mortality associated with cancer worldwide. Non‐small cell cancer (NSCLC) is the leading subtype of lung cancer. Ovarian tumor protease (OTU) domain‐containing protein 1 (OTUD1) is a member of the OTU subfamily of DUBs, and its function in NSCLC remains unclear. Methods GEPIA database was employed to reveal the expression level of OTUD1 in addition to Krüppel‐ like factor 4 (KLF4) in NSCLC tissue samples and prove the correlation between OTUD1 and KLF4. The protein level was estimated using western blot. Cell counting kit‐8 (CCK‐8) assay was used to detect cell viability and transwell assay was utilized to observe cell migration and invasion. Cycloheximide (CHX) was introduced to measure half‐lives of KLF4 and deubiquitination assay was used to detect deubiquitination ability of OTUD1. Results OTUD1 expression was downregulated in NSCLC tissues and cells. Overexpression of OTUD1 inhibited NSCLC cell progression and it was promoted by knockdown of OTUD1. OTUD1 was positively correlated with KLF4 and stabilized KLF4 at protein level by deubiquitinating KLF4. Overexpressing KLF4 dramatically eliminated the effects of OTUD1 on the development of NSCLC cells. Conclusions Our study revealed that OTUD1 suppresses NSCLC progression by mediating KLF4 stabilization, which suggests a potential gene target for the future treatment of NSCLC.
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Affiliation(s)
- Xiaoyan Ma
- Department of Critical Medicine Weifang People's Hospital Weifang China
| | - Liming Wang
- Department of Critical Medicine Weifang People's Hospital Weifang China
| | - Guifang Shi
- Department of Chinese Medicine Weifang People's Hospital Weifang China
| | - Shuqing Sun
- Department of Critical Medicine Weifang People's Hospital Weifang China
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11
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Salari N, Rasoulpoor S, Rasoulpoor S, Mansouri K, Shohaimi S, Mohammadi M. The Role of Krüppel-like Factor 4 (KLF4) Gene in Breast Cancer Tissue Samples: A Systematic Review and Meta-analysis. INDIAN JOURNAL OF GYNECOLOGIC ONCOLOGY 2022. [DOI: 10.1007/s40944-022-00605-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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12
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Szymonik J, Wala K, Górnicki T, Saczko J, Pencakowski B, Kulbacka J. The Impact of Iron Chelators on the Biology of Cancer Stem Cells. Int J Mol Sci 2021; 23:ijms23010089. [PMID: 35008527 PMCID: PMC8745085 DOI: 10.3390/ijms23010089] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Revised: 12/18/2021] [Accepted: 12/20/2021] [Indexed: 02/06/2023] Open
Abstract
Neoplastic diseases are still a major medical challenge, requiring a constant search for new therapeutic options. A serious problem of many cancers is resistance to anticancer drugs and disease progression in metastases or local recurrence. These characteristics of cancer cells may be related to the specific properties of cancer stem cells (CSC). CSCs are involved in inhibiting cells’ maturation, which is essential for maintaining their self-renewal capacity and pluripotency. They show increased expression of transcription factor proteins, which were defined as stemness-related markers. This group of proteins includes OCT4, SOX2, KLF4, Nanog, and SALL4. It has been noticed that the metabolism of cancer cells is changed, and the demand for iron is significantly increased. Iron chelators have been proven to have antitumor activity and influence the expression of stemness-related markers, thus reducing chemoresistance and the risk of tumor cell progression. This prompts further investigation of these agents as promising anticancer novel drugs. The article presents the characteristics of stemness markers and their influence on the development and course of neoplastic disease. Available iron chelators were also described, and their effects on cancer cells and expression of stemness-related markers were analyzed.
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Affiliation(s)
- Julia Szymonik
- Faculty of Medicine, Wroclaw Medical University, 50-367 Wroclaw, Poland; (J.S.); (K.W.); (T.G.)
| | - Kamila Wala
- Faculty of Medicine, Wroclaw Medical University, 50-367 Wroclaw, Poland; (J.S.); (K.W.); (T.G.)
| | - Tomasz Górnicki
- Faculty of Medicine, Wroclaw Medical University, 50-367 Wroclaw, Poland; (J.S.); (K.W.); (T.G.)
| | - Jolanta Saczko
- Department of Molecular and Cellular Biology, Faculty of Pharmacy, Wroclaw Medical University, 50-556 Wroclaw, Poland;
| | - Bartosz Pencakowski
- Department of Pharmaceutical Biology and Botany, Faculty of Pharmacy, Wroclaw Medical University, 50-367 Wroclaw, Poland;
| | - Julita Kulbacka
- Department of Molecular and Cellular Biology, Faculty of Pharmacy, Wroclaw Medical University, 50-556 Wroclaw, Poland;
- Correspondence: ; Tel.: +48-71-784-06-88
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13
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Pluripotency Stemness and Cancer: More Questions than Answers. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1376:77-100. [PMID: 34725790 DOI: 10.1007/5584_2021_663] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Embryonic stem cells and induced pluripotent stem cells provided us with fascinating new knowledge in recent years. Mechanistic insight into intricate regulatory circuitry governing pluripotency stemness and disclosing parallels between pluripotency stemness and cancer instigated numerous studies focusing on roles of pluripotency transcription factors, including Oct4, Sox2, Klf4, Nanog, Sall4 and Tfcp2L1, in cancer. Although generally well substantiated as tumour-promoting factors, oncogenic roles of pluripotency transcription factors and their clinical impacts are revealing themselves as increasingly complex. In certain tumours, both Oct4 and Sox2 behave as genuine oncogenes, and reporter genes driven by composite regulatory elements jointly recognized by both the factors can identify stem-like cells in a proportion of tumours. On the other hand, cancer stem cells seem to be biologically very heterogeneous both among different tumour types and among and even within individual tumours. Pluripotency transcription factors are certainly implicated in cancer stemness, but do not seem to encompass its entire spectrum. Certain cancer stem cells maintain their stemness by biological mechanisms completely different from pluripotency stemness, sometimes even by engaging signalling pathways that promote differentiation of pluripotent stem cells. Moreover, while these signalling pathways may well be antithetical to stemness in pluripotent stem cells, they may cooperate with pluripotency factors in cancer stem cells - a paradigmatic example is provided by the MAPK-AP-1 pathway. Unexpectedly, forced expression of pluripotency transcription factors in cancer cells frequently results in loss of their tumour-initiating ability, their phenotypic reversion and partial epigenetic normalization. Besides the very different signalling contexts operating in pluripotent and cancer stem cells, respectively, the pronounced dose dependency of reprogramming pluripotency factors may also contribute to the frequent loss of tumorigenicity observed in induced pluripotent cancer cells. Finally, contradictory cell-autonomous and non-cell-autonomous effects of various signalling molecules operate during pluripotency (cancer) reprogramming. The effects of pluripotency transcription factors in cancer are thus best explained within the concept of cancer stem cell heterogeneity.
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Cell Populations Expressing Stemness-Associated Markers in Lung Adenocarcinoma. Life (Basel) 2021; 11:life11101106. [PMID: 34685477 PMCID: PMC8541371 DOI: 10.3390/life11101106] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 10/06/2021] [Accepted: 10/11/2021] [Indexed: 12/09/2022] Open
Abstract
The stemness-associated markers OCT4, NANOG, SOX2, KLF4 and c-MYC are expressed in numerous cancer types suggesting the presence of cancer stem cells (CSCs). Immunohistochemical (IHC) staining performed on 12 lung adenocarcinoma (LA) tissue samples showed protein expression of OCT4, NANOG, SOX2, KLF4 and c-MYC, and the CSC marker CD44. In situ hybridization (ISH) performed on six of the LA tissue samples showed mRNA expression of OCT4, NANOG, SOX2, KLF4 and c-MYC. Immunofluorescence staining performed on three of the tissue samples showed co-expression of OCT4 and c-MYC with NANOG, SOX2 and KLF4 by tumor gland cells, and expression of OCT4 and c-MYC exclusively by cells within the stroma. RT-qPCR performed on five LA-derived primary cell lines showed mRNA expression of all the markers except SOX2. Western blotting performed on four LA-derived primary cell lines demonstrated protein expression of all the markers except SOX2 and NANOG. Initial tumorsphere assays performed on four LA-derived primary cell lines demonstrated 0–80% of tumorspheres surpassing the 50 µm threshold. The expression of the stemness-associated markers OCT4, SOX2, NANOG, KFL4 and c-MYC by LA at the mRNA and protein level, and the unique expression patterns suggest a putative presence of CSC subpopulations within LA, which may be a novel therapeutic target for this cancer. Further functional studies are required to investigate the possession of stemness traits.
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Arora S, Singh P, Ahmad S, Ahmad T, Dohare R, Almatroodi SA, Alrumaihi F, Rahmani AH, Syed MA. Comprehensive Integrative Analysis Reveals the Association of KLF4 with Macrophage Infiltration and Polarization in Lung Cancer Microenvironment. Cells 2021; 10:cells10082091. [PMID: 34440860 PMCID: PMC8392240 DOI: 10.3390/cells10082091] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/07/2021] [Accepted: 08/12/2021] [Indexed: 01/05/2023] Open
Abstract
Macrophage polarization and infiltration to the tumor microenvironment (TME) is a critical determining factor for tumor progression. Macrophages are polarized into two states—M1 (pro-inflammatory, anti-tumorigenic and stimulated by LPS or IFN-γ) and M2 (anti-inflammatory pro-tumorigenic and stimulated by IL-4) phenotypes. Specifically, M2 macrophages enhance tumor cell growth and survival. Recent evidences suggest the pivotal role of microRNAs in macrophage polarization during the development of Non-small cell lung cancer (NSCLC), thus proposing a new therapeutic option to target lung cancer. In silico analysis determined cogent upregulation of KLF4, downregulation of IL-1β and miR-34a-5p in NSCLC tissues, consequently worsening the overall survival of NSCLC patients. We observed a significant association of KLF4 with macrophage infiltration and polarization in NSCLC. We found that KLF4 is critically implicated in M2 polarization of macrophages, which, in turn, promotes tumorigenesis. KLF4 expression correlated with miR-34a-5p and IL-1β in a feed-forward loop (FFL), both of which are implicated in immune regulation. Mechanistic overexpression of miR-34a-5p in macrophages (IL-4 stimulated) inhibits KLF4, along with downregulation of ARG1, REL-1MB (M2 macrophage specific markers), and upregulation of IL-1β, IL-6, (M1 macrophage specific markers), demonstrating macrophage polarization switch from M2 to M1 phenotype. Moreover, co-culture of these macrophages with NSCLC cells reduces their proliferation, wound healing, clonogenic capacity and enhanced NO-mediated apoptosis. Further, transfection of miR-34a-5p in NSCLC cells, also degrades KLF4, but enhances the expression of KLF4 regulated genes—IL-1β, IL-6 (pro-inflammatory mediators), which is further enhanced upon co-culture with IL-4 stimulated macrophages. Additionally, we observed a significant increase in i-NOS/NO content upon co-culture, suggesting polarization reversion of macrophages from M2 to M1, and eventually leading to anti-tumor effects. Our findings thus show a significant role of KLF4 in tumorigenesis and TAM polarization of NSCLC. However, miR-34a-5p mediated targeting of these molecular networks will provide a better therapeutic intervention for NSCLC.
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Affiliation(s)
- Shweta Arora
- Translational Research Lab, Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Prithvi Singh
- Centre for Interdisciplinary Research in Basic Sciences, Srinivasa Ramanujan Block, Jamia Millia Islamia, New Delhi 110025, India
| | - Shaniya Ahmad
- Translational Research Lab, Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi 110025, India
| | - Tanveer Ahmad
- Multidisciplinary Centre for Advance Research and Studies, Jamia Millia Islamia, New Delhi 110025, India
| | - Ravins Dohare
- Centre for Interdisciplinary Research in Basic Sciences, Srinivasa Ramanujan Block, Jamia Millia Islamia, New Delhi 110025, India
| | - Saleh A Almatroodi
- Department of Medical Laboratories, College of Applied Medical Sciences, Qassim University, Buraydah 51452, Saudi Arabia
| | - Faris Alrumaihi
- Department of Medical Laboratories, College of Applied Medical Sciences, Qassim University, Buraydah 51452, Saudi Arabia
| | - Arshad Husain Rahmani
- Department of Medical Laboratories, College of Applied Medical Sciences, Qassim University, Buraydah 51452, Saudi Arabia
| | - Mansoor Ali Syed
- Translational Research Lab, Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi 110025, India
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Blum A, Mostow K, Jackett K, Kelty E, Dakpa T, Ryan C, Hagos E. KLF4 Regulates Metabolic Homeostasis in Response to Stress. Cells 2021; 10:830. [PMID: 33917010 PMCID: PMC8067718 DOI: 10.3390/cells10040830] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 04/03/2021] [Accepted: 04/05/2021] [Indexed: 12/23/2022] Open
Abstract
Cancerous cells are detrimental to the human body and can be incredibly resilient against treatments because of the complexities of molecular carcinogenic pathways. In particular, cancer cells are able to sustain increased growth under metabolic stress due to phenomena like the Warburg effect. Krüppel-like factor 4 (KLF4), a context-dependent transcription factor that can act as both a tumor suppressor and an oncogene, is involved in many molecular pathways that respond to low glucose and increased reactive oxygen species (ROS), raising the question of its role in metabolic stress as a result of increased proliferation of tumor cells. In this study, metabolic assays were performed, showing enhanced efficiency of energy production in cells expressing KLF4. Western blotting showed that KLF4 increases the expression of essential glycolytic proteins. Furthermore, we used immunostaining to show that KLF4 increases the localization of glucose transporter 1 (GLUT1) to the cellular membrane. 2',7'-Dichlorodihydrofluorescein diacetate (H2DCF-DA) was used to analyze the production of ROS, and we found that KLF4 reduces stress-induced ROS within cells. Finally, we demonstrated increased autophagic death in KLF4-expressing cells in response to glucose starvation. Collectively, these results relate KLF4 to non-Warburg metabolic behaviors that support its role as a tumor suppressor and could make KLF4 a target for new cancer treatments.
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Affiliation(s)
| | | | | | | | | | | | - Engda Hagos
- Department of Biology, Colgate University, Hamilton, NY 13346, USA; (A.B.); (K.M.); (K.J.); (E.K.); (T.D.); (C.R.)
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Chen M, Ye AX, Wei J, Wang R, Poon K. Deoxycholic Acid Upregulates the Reprogramming Factors KFL4 and OCT4 Through the IL-6/STAT3 Pathway in Esophageal Adenocarcinoma Cells. Technol Cancer Res Treat 2020; 19:1533033820945302. [PMID: 32869704 PMCID: PMC7469721 DOI: 10.1177/1533033820945302] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Cancer stem cells, a special subgroup of cancer cells, have self-renewal capabilities and multidirectional potential, which may be reprogrammed from the dedifferentiation of cancer cells, contributing to the failure of clinical treatments. Esophageal adenocarcinoma grows in an inflammatory environment stimulated by deoxycholic acid, an important component of gastroesophageal reflux content, contributing to the transformation of esophageal squamous epithelium to the precancerous lesions of esophageal adenocarcinoma, that is, Barrett esophagus. In the present study, deoxycholic acid was used to investigate whether it could induce the expression of reprogramming factors Krüppel-like factor, OCT4, and Nanog; the transformation to cancer stem cells in esophageal adenocarcinoma; and the involvement of the interleukin-6/signal transduction and activation of transcription 3 inflammatory signaling pathway. OE33 cells were treated with deoxycholic acid (250 μM) for 0 hour, 3 hours, 6 hours, and 12 hours before evaluating the messenger RNA expression of Krüppel-like factor, OCT4, Nanog, interleukin-6, and Bcl-xL by reverse transcription-quantitative polymerase chain reaction. Interleukin-6 protein was detected by enzyme linked immunosorbent assay, while signal transduction and activation of transcription 3, phosphorylated signal transduction and activation of transcription 3, Krüppel-like factor, and OCT4 were detected by Western blot. Signal transduction and activation of transcription 3 small interfering RNA and human recombinant interleukin-6 were used to treat OE33 cells and to detect their effects on Krüppel-like factor, OCT4, Nanog, CD44, hypoxia-inducible factor 1-α, and Bcl-xL expression. Results showed that deoxycholic acid promotes the expression of reprogramming factors Krüppel-like factor and OCT4, which are regulated by the interleukin-6/signal transduction and activation of transcription 3 signaling pathway. Deoxycholic acid has a malignancy-inducing effect on the transformation of esophageal adenocarcinoma stem cells, improving the antiapoptotic ability of tumors, and increasing the malignancy of esophageal adenocarcinoma. Deactivating the regulatory signaling pathway of interleukin-6/signal transduction and activation of transcription 3 and neutralizing deoxycholic acid may be novel targets for improving the clinical efficacy of esophageal adenocarcinoma therapy.
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Affiliation(s)
- Mei Chen
- Department of Gastroenterology, Shenzhen Hospital of Southern Medical University, Shenzhen, People's Republic of China
| | - AXiaojun Ye
- Division of Science and Technology, Program of Food Science and Technology, 125809BNU-HKBU United International College, Tangjiawan, Zhuhai, Guangdong, People's Republic of China
| | - Jingxi Wei
- Division of Science and Technology, Program of Food Science and Technology, 125809BNU-HKBU United International College, Tangjiawan, Zhuhai, Guangdong, People's Republic of China
| | - Ruihua Wang
- Department of Gastroenterology, Shenzhen Hospital of Southern Medical University, Shenzhen, People's Republic of China
| | - Karen Poon
- Division of Science and Technology, Program of Food Science and Technology, 125809BNU-HKBU United International College, Tangjiawan, Zhuhai, Guangdong, People's Republic of China
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18
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Wang X, Xia S, Li H, Wang X, Li C, Chao Y, Zhang L, Han C. The deubiquitinase USP10 regulates KLF4 stability and suppresses lung tumorigenesis. Cell Death Differ 2020; 27:1747-1764. [PMID: 31748695 PMCID: PMC7244734 DOI: 10.1038/s41418-019-0458-7] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 11/04/2019] [Accepted: 11/06/2019] [Indexed: 12/30/2022] Open
Abstract
Krüppel-like factor 4 (KLF4), a key transcription factor, acts as a multifunctional player involved in the progression of numerous aggressive cancers. The proteasome-dependent pathway is one of the main modalities in controlling KLF4 abundance at a posttranslational level. Although some of the ubiquitin ligases have been identified, the deubiquitinases of KLF4 and the regulatory function remain unexplored. Here, by screening ubiquitin-specific proteases that may interact with KLF4, we found ubiquitin-specific peptidase 10 (USP10) as a deubiquitinating enzyme for KLF4. Forced expression of USP10 remarkably increases KLF4 protein level by blocking the latter degradation, whereas the depletion of USP10 promotes KLF4 degradation and thus enhances tumorigenesis. Loss of USP10 in mice downregulates KLF4 expression and accelerates KrasG12D-driven lung adenocarcinoma initiation and progression. In addition, our data revealed that KLF4 can facilitate the transcription of tumor suppressor TIMP3 by directly binding to the TIMP3 promoter. Clinically, reduction of USP10 expression, concomitant with decreased KLF4 and TIMP3 abundance in carcinoma tissue, predicts poor prognosis of lung cancer patient. Taken together, our results demonstrate that USP10 is a critical regulator of KLF4, pinpointing USP10-KLF4-TIMP3 axis as a promising therapeutic target in lung cancer.
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Affiliation(s)
- Xingyun Wang
- Institute of Cancer Stem Cell, Dalian Medical University, Dalian, 116044, China
- Women's Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing, 210004, China
| | - Shilin Xia
- Clinical Laboratory of Integrative Medicine, The First Affiliated Hospital of Dalian Medical University, Dalian, 116027, China
| | - Hongchang Li
- State Key Laboratory of Proteomics, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, 100850, Beijing, China
| | - Xiang Wang
- Institute of Cancer Stem Cell, Dalian Medical University, Dalian, 116044, China
| | - Chaonan Li
- State Key Laboratory of Proteomics, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, 100850, Beijing, China
| | - Yulin Chao
- Institute of Cancer Stem Cell, Dalian Medical University, Dalian, 116044, China
| | - Lingqiang Zhang
- State Key Laboratory of Proteomics, National Center for Protein Sciences (Beijing), Beijing Institute of Lifeomics, 100850, Beijing, China.
| | - Chuanchun Han
- Institute of Cancer Stem Cell, Dalian Medical University, Dalian, 116044, China.
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Wang Z, Yin J, Zhou W, Bai J, Xie Y, Xu K, Zheng X, Xiao J, Zhou L, Qi X, Li Y, Li X, Xu J. Complex impact of DNA methylation on transcriptional dysregulation across 22 human cancer types. Nucleic Acids Res 2020; 48:2287-2302. [PMID: 32002550 PMCID: PMC7049702 DOI: 10.1093/nar/gkaa041] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 01/14/2020] [Indexed: 12/18/2022] Open
Abstract
Accumulating evidence has demonstrated that transcriptional regulation is affected by DNA methylation. Understanding the perturbation of DNA methylation-mediated regulation between transcriptional factors (TFs) and targets is crucial for human diseases. However, the global landscape of DNA methylation-mediated transcriptional dysregulation (DMTD) across cancers has not been portrayed. Here, we systematically identified DMTD by integrative analysis of transcriptome, methylome and regulatome across 22 human cancer types. Our results revealed that transcriptional regulation was affected by DNA methylation, involving hundreds of methylation-sensitive TFs (MethTFs). In addition, pan-cancer MethTFs, the regulatory activity of which is generally affected by DNA methylation across cancers, exhibit dominant functional characteristics and regulate several cancer hallmarks. Moreover, pan-cancer MethTFs were found to be affected by DNA methylation in a complex pattern. Finally, we investigated the cooperation among MethTFs and identified a network module that consisted of 43 MethTFs with prognostic potential. In summary, we systematically dissected the transcriptional dysregulation mediated by DNA methylation across cancer types, and our results provide a valuable resource for both epigenetic and transcriptional regulation communities.
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Affiliation(s)
- Zishan Wang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Jiaqi Yin
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Weiwei Zhou
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Jing Bai
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Yunjin Xie
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Kang Xu
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Xiangyi Zheng
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Jun Xiao
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China
| | - Li Zhou
- Department of Nephrology, Affiliated Hospital of Chengde Medical College, Chengde, Hebei Province, China
| | - Xiaolin Qi
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Medical University, Haikou, Hainan 571199, China
| | - Yongsheng Li
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China.,Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Medical University, Haikou, Hainan 571199, China.,College of Biomedical Information and Engineering, Hainan Medical University, Haikou, Hainan 570100, China
| | - Xia Li
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China.,Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Medical University, Haikou, Hainan 571199, China.,College of Biomedical Information and Engineering, Hainan Medical University, Haikou, Hainan 570100, China
| | - Juan Xu
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, China.,Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Medical University, Haikou, Hainan 571199, China.,College of Biomedical Information and Engineering, Hainan Medical University, Haikou, Hainan 570100, China
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20
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KLF4-mediated upregulation of CD9 and CD81 suppresses hepatocellular carcinoma development via JNK signaling. Cell Death Dis 2020; 11:299. [PMID: 32350244 PMCID: PMC7190708 DOI: 10.1038/s41419-020-2479-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 04/08/2020] [Accepted: 04/08/2020] [Indexed: 02/08/2023]
Abstract
Tetraspanins CD9 and CD81 frequently serve as the surface markers of exosomes, which are involved in intercellular communication during tumor progression. KLF4 is a well-known tumor suppressor in various cancers. This study aims to investigate the relationship between KLF4 and CD9/CD81 in hepatocellular carcinoma (HCC). The results showed that CD9 and CD81 were transcriptionally activated by KLF4 in HCC cell lines. Decreased expressions of CD9 and CD81 were found in most HCC tumor tissues and predicted advanced stages. Furthermore, KLF4 expression was positively associated with CD9 and CD81 expression in HCC specimens. Functionally, overexpression of CD9 and CD81 inhibited HCC cell proliferation in vitro and in vivo and silencing CD9 and CD81 displayed opposite phenotypes. Mechanistically, we found that JNK signaling pathway may be involved in the growth suppression mediated by CD9 and CD81. In addition, increased expression of KLF4, CD9 or CD81 had no obvious impact on exosome secretion from HCC cells. Collectively, we identified CD9 and CD81 as new transcriptional targets of KLF4 and the dysregulated KLF4-CD9/CD81-JNK signaling contributes to HCC development. Our findings will provide new promising targets against this disease.
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21
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Wu Y, Lin L, Wang X, Li Y, Liu Z, Ye W, Huang W, Lin G, Liu H, Zhang J, Li T, Zhao B, Lv L, Li J, Wang N, Liu X. Overexpression of Krüppel-Like Factor 4 Suppresses Migration and Invasion of Non-Small Cell Lung Cancer Through c-Jun-NH2-Terminal Kinase/Epithelial-Mesenchymal Transition Signaling Pathway. Front Pharmacol 2020; 10:1512. [PMID: 31969824 PMCID: PMC6960180 DOI: 10.3389/fphar.2019.01512] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 11/21/2019] [Indexed: 01/01/2023] Open
Abstract
Krüppel-like factor 4 (KLF4) is a transcription factor and plays a vital role in cancer initiation and development. However, the role of Krüppel-like factor 4 in the metastasis of non-small cell lung cancer (NSCLC) is not clear. Here, we demonstrated that the expression of Krüppel-like factor 4 was significantly decreased in human non-small cell lung cancer tissues compared with that in normal tissues using Western blot. We performed immunohistochemical staining and observed the decreased expression of Krüppel-like factor 4 in human lung cancer tissues, and metastatic tumor tissues located in the trachea and main bronchus. We also found that the E-cadherin expression was decreased, while vimentin expression was increased in human NSCLC tissues and metastatic tumor tissues located in the trachea and main bronchus. Additionally, enforced expression of Krüppel-like factor 4 in mouse lungs significantly inhibited the metastasis of circulating Lewis lung carcinoma cells to the lungs by attenuating mesenchymal-epithelial transition (MET). Furthermore, cell scratch assays and Matrigel invasion assays revealed that overexpression of Krüppel-like factor 4 inhibited the migration and invasion of non-small cell lung cancer cell lines A549, H1299, H226, and H1650 cells. Moreover, overexpression of Krüppel-like factor 4 attenuated TGF-β1-induced epithelial-mesenchymal transition (EMT) in A549, and inhibited the phosphorylation of c-Jun-NH2-terminal kinase (JNK), an important pathway in metastasis in non-small cell lung cancer. Our in vivo and in vitro findings illustrate that Krüppel-like factor 4 inhibited metastasis and migration of non-small cell lung cancer, and indicate that Krüppel-like factor 4 could be a potential therapeutic target for the treatment of non-small cell lung cancer.
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Affiliation(s)
- Yanping Wu
- Department of Geriatrics, Peking University First Hospital, Beijing, China
| | - Lianjun Lin
- Department of Geriatrics, Peking University First Hospital, Beijing, China
| | - Xiang Wang
- Department of Geriatrics, Peking University First Hospital, Beijing, China
| | - Yong Li
- Department of Geriatrics, Peking University First Hospital, Beijing, China
| | - Zhonghui Liu
- Department of Geriatrics, Peking University First Hospital, Beijing, China
| | - Wei Ye
- Department of Interventional Pulmonary Disease, Anhui Chest Hospital, Hefei, China
| | - Weiming Huang
- Department of Thoracic Surgery, Peking University First Hospital, Beijing, China
| | - Gang Lin
- Department of Thoracic Surgery, Peking University First Hospital, Beijing, China
| | - Haibo Liu
- Department of Thoracic Surgery, Peking University First Hospital, Beijing, China
| | - Jixin Zhang
- Department of Pathology, Peking University First Hospital, Beijing, China
| | - Ting Li
- Department of Pathology, Peking University First Hospital, Beijing, China
| | - Beilei Zhao
- Key Laboratory of Molecular Cardiovascular Science of Ministry of Education, Peking University Health Science Center, Beijing, China
| | - Liping Lv
- Department of Interventional Pulmonary Disease, Anhui Chest Hospital, Hefei, China
| | - Jian Li
- Department of Thoracic Surgery, Peking University First Hospital, Beijing, China
| | - Nanping Wang
- Key Laboratory of Molecular Cardiovascular Science of Ministry of Education, Peking University Health Science Center, Beijing, China
| | - Xinmin Liu
- Department of Geriatrics, Peking University First Hospital, Beijing, China
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22
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Cells deficient for Krüppel-like factor 4 exhibit mitochondrial dysfunction and impaired mitophagy. Eur J Cell Biol 2020; 99:151061. [DOI: 10.1016/j.ejcb.2019.151061] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 11/09/2019] [Accepted: 11/28/2019] [Indexed: 01/19/2023] Open
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Hodges AJ, Hudson NO, Buck-Koehntop BA. Cys 2His 2 Zinc Finger Methyl-CpG Binding Proteins: Getting a Handle on Methylated DNA. J Mol Biol 2019:S0022-2836(19)30567-4. [PMID: 31628952 DOI: 10.1016/j.jmb.2019.09.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 09/13/2019] [Accepted: 09/16/2019] [Indexed: 12/12/2022]
Abstract
DNA methylation is an essential epigenetic modification involved in the maintenance of genomic stability, preservation of cellular identity, and regulation of the transcriptional landscape needed to maintain cellular function. In an increasing number of disease conditions, DNA methylation patterns are inappropriately distributed in a manner that supports the disease phenotype. Methyl-CpG binding proteins (MBPs) are specialized transcription factors that read and translate methylated DNA signals into recruitment of protein assemblies that can alter local chromatin architecture and transcription. MBPs thus play a key intermediary role in gene regulation for both normal and diseased cells. Here, we highlight established and potential structure-function relationships for the best characterized members of the zinc finger (ZF) family of MBPs in propagating DNA methylation signals into downstream cellular responses. Current and future investigations aimed toward expanding our understanding of ZF MBP cellular roles will provide needed mechanistic insight into normal and disease state functions, as well as afford evaluation for the potential of these proteins as epigenetic-based therapeutic targets.
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Affiliation(s)
- Amelia J Hodges
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, UT, 84112, USA
| | - Nicholas O Hudson
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, UT, 84112, USA
| | - Bethany A Buck-Koehntop
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, UT, 84112, USA.
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Tu Z, Schmöllerl J, Cuiffo BG, Karnoub AE. Microenvironmental Regulation of Long Noncoding RNA LINC01133 Promotes Cancer Stem Cell-Like Phenotypic Traits in Triple-Negative Breast Cancers. Stem Cells 2019; 37:1281-1292. [PMID: 31283068 DOI: 10.1002/stem.3055] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 06/06/2019] [Accepted: 06/16/2019] [Indexed: 01/08/2023]
Abstract
The fibrotic tumor microenvironment is a critical player in the pathogenesis of triple-negative breast cancers (TNBCs), with the presence of fibroblastic infiltrates particularly correlating with tumors that are clinically advanced. On this front, we previously demonstrated that TNBCs are highly enriched in fibroblastic stromal progenitor cells called mesenchymal stem/stromal cells (MSCs) and that such cells play critical roles in promoting TNBC initiation and progression. How TNBC cells respond to MSC stimulation, however, is not fully understood, and stands to reveal contextual signals used by TNBC cells during tumor development and provide biomarkers and therapeutic targets of pertinence to TNBC management. Here, we report that MSCs strongly induced the long noncoding RNA (lncRNA) LINC01133 in neighboring TNBC cells. Indeed, although lncRNAs have been tightly associated with cancer development, their contributions to breast cancer in general, and to TNBC pathogenesis in particular, have not been fully elucidated, and we set out to determine if LINC01133 regulated malignant traits in TNBC cells. We establish that LINC01133 is sufficient, on its own, in promoting phenotypic and growth characteristics of cancer stem cell-like cells, and that it is a direct mediator of the MSC-triggered miR-199a-FOXP2 pathway in TNBC models. Furthermore, we show that LINC01133 is a critical regulator of the pluripotency-determining gene Kruppel-Like Factor 4 (KLF4), and that it represents a biomarker and prognosticator of disease outcome in the clinic. Collectively, our findings introduce LINC01133 as a novel functional driver of malignancy and a potential theranostic in TNBC. Stem Cells 2019;37:1281-1292.
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Affiliation(s)
- Zhenbo Tu
- Department of Pathology and Cancer Center, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Johannes Schmöllerl
- Department of Pathology and Cancer Center, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Benjamin G Cuiffo
- Department of Pathology and Cancer Center, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Antoine E Karnoub
- Department of Pathology and Cancer Center, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA.,Harvard Stem Cell Institute, Cambridge, Massachusetts, USA.,Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
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25
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Xu K, Sun G, Li M, Chen H, Zhang Z, Qian X, Li P, Xu L, Huang W, Wang X. Glibenclamide Targets Sulfonylurea Receptor 1 to Inhibit p70S6K Activity and Upregulate KLF4 Expression to Suppress Non-Small Cell Lung Carcinoma. Mol Cancer Ther 2019; 18:2085-2096. [PMID: 31341030 DOI: 10.1158/1535-7163.mct-18-1181] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 03/19/2019] [Accepted: 07/17/2019] [Indexed: 11/16/2022]
Affiliation(s)
- Kexin Xu
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Geng Sun
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Min Li
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Hongling Chen
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Zuhao Zhang
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Xixi Qian
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Ping Li
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Lin Xu
- Department of Thoracic Surgery, Jiangsu Cancer Hospital, Nanjing Medical University Affiliated Cancer Hospital, Nanjing, Jiangsu Province, China
| | - Wenbin Huang
- Department of Pathology, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Xuerong Wang
- Department of Pharmacology, Nanjing Medical University, Nanjing, Jiangsu Province, China.
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26
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Li L, Yu S, Wu Q, Dou N, Li Y, Gao Y. KLF4-Mediated CDH3 Upregulation Suppresses Human Hepatoma Cell Growth and Migration via GSK-3β Signaling. Int J Biol Sci 2019; 15:953-961. [PMID: 31182916 PMCID: PMC6535787 DOI: 10.7150/ijbs.30857] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 02/07/2019] [Indexed: 12/25/2022] Open
Abstract
P-cadherin (CDH3), a classical cell adhesion molecule involved in tissue integrity and cell localization, has been implicated in many types of cancer. However, little is known about its function and regulatory mechanism in hepatocellular carcinoma (HCC). Here we report that CDH3 was positively regulated by kr¨uppel-like transcription factor 4 (KLF4), which is a crucial tumor suppressor gene in HCC, at mRNA level in HCC cell lines. Luciferase reporter assay and chromatin immunoprecipitation assay indicated that KLF4 directly bound to CDH3 promoter and transcriptionally activated CDH3 expression. Consistently, CDH3 expression was closely related with KLF4 expression in patients' samples and both proteins exhibited a downregulated expression pattern in cancer samples. Functionally, enforced CDH3 expression suppressed and silenced CDH3 expression promoted HCC cell growth and migration in vitro. Mechanistically, we observed that GSK-3β was regulated by CDH3 and may function as a possible downstream effector of CDH3. Knockdown of GSK-3β showed a similar phenotype with CDH3 silencing. Taken together, these findings establish the KLF4/CDH3/GSK-3β axis as an important regulatory mechanism in HCC development.
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Affiliation(s)
- Li Li
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Shijun Yu
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Qiong Wu
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Ning Dou
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Yandong Li
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China.,Research Center for Translational Medicine, Shanghai East Hospital, Shanghai 200120, China
| | - Yong Gao
- Department of Oncology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
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27
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Monteiro-Reis S, Lobo J, Henrique R, Jerónimo C. Epigenetic Mechanisms Influencing Epithelial to Mesenchymal Transition in Bladder Cancer. Int J Mol Sci 2019; 20:ijms20020297. [PMID: 30642115 PMCID: PMC6358899 DOI: 10.3390/ijms20020297] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 01/02/2019] [Accepted: 01/09/2019] [Indexed: 12/27/2022] Open
Abstract
Bladder cancer is one of the most incident neoplasms worldwide, and its treatment remains a significant challenge, since the mechanisms underlying disease progression are still poorly understood. The epithelial to mesenchymal transition (EMT) has been proven to play an important role in the tumorigenic process, particularly in cancer cell invasiveness and metastatic potential. Several studies have reported the importance of epigenetic mechanisms and enzymes, which orchestrate them in several features of cancer cells and, specifically, in EMT. In this paper, we discuss the epigenetic enzymes, protein-coding and non-coding genes, and mechanisms altered in the EMT process occurring in bladder cancer cells, as well as its implications, which allows for improved understanding of bladder cancer biology and for the development of novel targeted therapies.
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Affiliation(s)
- Sara Monteiro-Reis
- Cancer Biology and Epigenetics Group, Research Center, Portuguese Oncology Institute of Porto (CI-IPOP), R. Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal.
| | - João Lobo
- Cancer Biology and Epigenetics Group, Research Center, Portuguese Oncology Institute of Porto (CI-IPOP), R. Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal.
- Department of Pathology, Portuguese Oncology Institute of Porto (IPOP), R. Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal.
- Department of Pathology and Molecular Immunology, Institute of Biomedical Sciences Abel Salazar, University of Porto (ICBAS-UP), Rua Jorge Viterbo Ferreira 228, 4050-513 Porto, Portugal.
| | - Rui Henrique
- Cancer Biology and Epigenetics Group, Research Center, Portuguese Oncology Institute of Porto (CI-IPOP), R. Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal.
- Department of Pathology, Portuguese Oncology Institute of Porto (IPOP), R. Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal.
- Department of Pathology and Molecular Immunology, Institute of Biomedical Sciences Abel Salazar, University of Porto (ICBAS-UP), Rua Jorge Viterbo Ferreira 228, 4050-513 Porto, Portugal.
| | - Carmen Jerónimo
- Cancer Biology and Epigenetics Group, Research Center, Portuguese Oncology Institute of Porto (CI-IPOP), R. Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal.
- Department of Pathology and Molecular Immunology, Institute of Biomedical Sciences Abel Salazar, University of Porto (ICBAS-UP), Rua Jorge Viterbo Ferreira 228, 4050-513 Porto, Portugal.
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28
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Li Z, Huang J, Shen S, Ding Z, Luo Q, Chen Z, Lu S. SIRT6 drives epithelial-to-mesenchymal transition and metastasis in non-small cell lung cancer via snail-dependent transrepression of KLF4. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2018; 37:323. [PMID: 30577808 PMCID: PMC6303940 DOI: 10.1186/s13046-018-0984-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Accepted: 11/29/2018] [Indexed: 01/09/2023]
Abstract
BACKGROUND Epithelial-to-mesenchymal transition (EMT) contributes to the invasion and metastasis of epithelial tumors. Sirtuin 6 (SIRT6), an NAD-dependent deacetylase, is known to promote metastasis of non-small cell lung cancer (NSCLC). METHODS In this work, we determined the role of SIRT6 in the EMT of NSCLC cells and identified the key EMT-related genes involved in the oncogenic activity of SIRT6. RESULTS We report that depletion of SIRT6 inhibits transforming growth factor-β1 (TGF-β1)-induced EMT in A549 and H1299 NSCLC cells, which is rescued by ectopic expression of SIRT6. Knockdown of SIRT6 leads to a reduction in Snail protein without affecting the mRNA level. Immunoprecipitation experiments demonstrate a physical association between SIRT6 and Snail. SIRT6 deacetylates Snail and prevents its proteasomal degradation. Silencing of Snail blunts SIRT6-induced NSCLC cell migration and invasion, while overexpression of Snail restores the invasion and EMT in SIRT6-depleted NSCLC cells. SIRT6 depletion leads to an upregulation of kruppel-like factor 4 (KLF4) and reduced Snail binding to the promoter of Klf4 in NSCLC cells. Knockdown of KLF4 rescues the invasive capacity in SIRT6-depleted NSCLC cells. Conversely, co-expression of KLF4 impairs SIRT6-induced aggressive behavior. In vivo data further demonstrate that SIRT6-induced NSCLC metastasis is antagonized by overexpression of KLF4. CONCLUSIONS These findings provide mechanistic insights into the pro-metastatic activity of SIRT6 and highlight the role of the SIRT6/Snail/KLF4 axis in regulating EMT and invasion of NSCLC cells.
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Affiliation(s)
- Ziming Li
- Shanghai Lung Cancer Center, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Jia Huang
- Shanghai Lung Cancer Center, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Shengping Shen
- Shanghai Lung Cancer Center, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Zhenping Ding
- Shanghai Lung Cancer Center, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Qingquan Luo
- Shanghai Lung Cancer Center, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China.
| | - Zhiwei Chen
- Shanghai Lung Cancer Center, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China.
| | - Shun Lu
- Shanghai Lung Cancer Center, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
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29
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Marcos-López M, Calduch-Giner JA, Mirimin L, MacCarthy E, Rodger HD, O'Connor I, Sitjà-Bobadilla A, Pérez-Sánchez J, Piazzon MC. Gene expression analysis of Atlantic salmon gills reveals mucin 5 and interleukin 4/13 as key molecules during amoebic gill disease. Sci Rep 2018; 8:13689. [PMID: 30209326 PMCID: PMC6135806 DOI: 10.1038/s41598-018-32019-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 08/20/2018] [Indexed: 12/19/2022] Open
Abstract
Amoebic gill disease (AGD) is one of the main diseases affecting Atlantic salmon (Salmo salar L.) mariculture. Hallmarks of AGD are hyperplasia of the lamellar epithelium and increased production of gill mucus. This study investigated the expression of genes involved in mucus secretion, cell cycle regulation, immunity and oxidative stress in gills using a targeted 21-gene PCR array. Gill samples were obtained from experimental and natural Neoparamoeba perurans infections, and sampling points included progressive infection stages and post-freshwater treatment. Up-regulation of genes related to mucin secretion and cell proliferation, and down-regulation of pro-inflammatory and pro-apoptotic genes were associated with AGD severity, while partial restoration of the gill homeostasis was detected post-treatment. Mucins and Th2 cytokines accoun ted for most of the variability observed between groups highlighting their key role in AGD. Two mucins (muc5, muc18) showed differential regulation upon disease. Substantial up-regulation of the secreted muc5 was detected in clinical AGD, and the membrane bound muc18 showed an opposite pattern. Th2 cytokines, il4/13a and il4/13b2, were significantly up-regulated from 2 days post-infection onwards, and changes were lesion-specific. Despite the differences between experimental and natural infections, both yielded comparable results that underline the importance of the studied genes in the respiratory organs of fish, and during AGD progression.
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Affiliation(s)
- Mar Marcos-López
- Marine and Freshwater Research Centre, Galway-Mayo Institute of Technology, Dublin Road, Galway, Co., Galway, H91 T8NW, Ireland. .,FishVet Group Ireland, Unit 7b Oranmore Business Park, Oranmore, Co, Galway, H91 XP3F, Ireland.
| | - Josep A Calduch-Giner
- Nutrigenomics and Fish Growth Endocrinology Group, Instituto de Acuicultura Torre de la Sal (IATS-CSIC), Castellón, 12595, Spain
| | - Luca Mirimin
- Marine and Freshwater Research Centre, Galway-Mayo Institute of Technology, Dublin Road, Galway, Co., Galway, H91 T8NW, Ireland
| | - Eugene MacCarthy
- Marine and Freshwater Research Centre, Galway-Mayo Institute of Technology, Dublin Road, Galway, Co., Galway, H91 T8NW, Ireland
| | - Hamish D Rodger
- FishVet Group Ireland, Unit 7b Oranmore Business Park, Oranmore, Co, Galway, H91 XP3F, Ireland
| | - Ian O'Connor
- Marine and Freshwater Research Centre, Galway-Mayo Institute of Technology, Dublin Road, Galway, Co., Galway, H91 T8NW, Ireland
| | - Ariadna Sitjà-Bobadilla
- Fish Pathology Group, Instituto de Acuicultura Torre de la Sal (IATS-CSIC), Castellón, 12595, Spain
| | - Jaume Pérez-Sánchez
- Nutrigenomics and Fish Growth Endocrinology Group, Instituto de Acuicultura Torre de la Sal (IATS-CSIC), Castellón, 12595, Spain
| | - M Carla Piazzon
- Fish Pathology Group, Instituto de Acuicultura Torre de la Sal (IATS-CSIC), Castellón, 12595, Spain.
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30
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Xu H, Wen Q. miR‑3120‑5p acts as a diagnostic biomarker in non‑small cell lung cancer and promotes cancer cell proliferation and invasion by targeting KLF4. Mol Med Rep 2018; 18:4621-4628. [PMID: 30221715 DOI: 10.3892/mmr.2018.9454] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 08/09/2018] [Indexed: 11/06/2022] Open
Abstract
Accumulating evidence indicates that microRNAs (miRs) are important regulators in a number of types of human cancer, including non‑small cell lung cancer (NSCLC). The function of miR‑3120‑5p in NSCLC remains unclear. In the present study, it was demonstrated that miR‑3120‑5p was significantly upregulated in NSCLC tissues. Additionally, miR‑3120‑5p expression level was positively associated with NSCLC metastasis and tumor, node and metastasis stage. Furthermore, it was demonstrated that miR‑3120‑5p exhibited potential as an indicator of NSCLC for use in diagnosis. Through functional experiments, it was demonstrated that overexpression of miR‑3120‑5p promoted the proliferation, colony formation and invasion of NSCLC cells. miR‑3120‑5p overexpression significantly promoted cell cycle progression. Mechanistically, it was demonstrated that Krueppel‑like factor 4 (KLF4) was a target of miR‑3120‑5p in NSCLC cells. Overexpression of miR‑3120‑5p repressed the expression of KLF4 in A549 and H460 cells. Furthermore, it was demonstrated that KLF4 was downregulated in NSCLC tissues and cell lines. Overexpression of KLF4 significantly reversed the effects of miR‑3120‑5p on NSCLC cell proliferation and invasion. In conclusion, the present study demonstrated that miR‑3120‑5p promoted NSCLC progression by directly targeting KLF4.
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Affiliation(s)
- Hongwei Xu
- Clinical Laboratory, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
| | - Quan Wen
- General Internal Medicine Laboratory, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
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31
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Chatterjee B, Ghosh K, Kanade SR. Curcumin‐mediated demethylation of the proximal promoter CpG island enhances the KLF4 recruitment that leads to increased expression of p21Cip1 in vitro. J Cell Biochem 2018; 120:809-820. [DOI: 10.1002/jcb.27442] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 07/16/2018] [Indexed: 12/19/2022]
Affiliation(s)
- Biji Chatterjee
- Department of Biochemistry and Molecular Biology, School of Biological Sciences Central University of Kerala Kasargod India
| | - Krishna Ghosh
- Department of Biochemistry and Molecular Biology, School of Biological Sciences Central University of Kerala Kasargod India
| | - Santosh R. Kanade
- Department of Biochemistry and Molecular Biology, School of Biological Sciences Central University of Kerala Kasargod India
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32
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Yu M, Hao B, Zhan Y, Luo G. Krüppel-like factor 4 expression in solid tumor prognosis: A meta-analysis. Clin Chim Acta 2018; 485:50-59. [PMID: 29940144 DOI: 10.1016/j.cca.2018.06.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 06/19/2018] [Accepted: 06/21/2018] [Indexed: 02/06/2023]
Abstract
BACKGROUND Accumulating studies have demonstrated that Krüppel-like factor 4 (KLF4) can act as a tumor suppressor or oncogene in the carcinogenesis of diverse cancers. The prognostic value of KLF4 in various human solid cancers remains controversial. Thus, the present meta-analysis was conducted to evaluate the prognostic value of KLF4 in solid tumors. METHODS Eligible literature was retrieved by searching the PubMed, Embase, and Cochrane Library. Combined hazard ratios (HRs) for overall survival (OS) and disease-free survival (DFS) were assessed using fixed-effects and random-effects models. Meta-regression and subgroup analyses were performed to identify the source of heterogeneity. In addition, publication bias was assessed using Begg's funnel plot and Egger's regression asymmetry test. RESULTS The 22 eligible studies finally enrolled a total of 2988 patients to assess the prognostic value of KLF4 in solid tumors. Low KLF4 expression was clearly related to worse OS (HR = 1.71, 95% confidence interval [CI] = 1.30-2.24, P < 0.001) and DFS (HR = 1.74, 95% CI = 1.34-2.26, P < 0.001), indicating that low KLF4 expression could be an independent prognostic factor for poor survival in solid cancers. CONCLUSION KLF4 might be a potential marker to predict prognosis in solid cancer patients.
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Affiliation(s)
- Miaomei Yu
- Comprehensive Laboratory, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
| | - Bo Hao
- Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
| | - Yuxia Zhan
- Comprehensive Laboratory, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China
| | - Guanghua Luo
- Comprehensive Laboratory, The Third Affiliated Hospital of Soochow University, Changzhou 213003, China.
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33
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The novel KLF4/PLAC8 signaling pathway regulates lung cancer growth. Cell Death Dis 2018; 9:603. [PMID: 29789534 PMCID: PMC5964121 DOI: 10.1038/s41419-018-0580-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 03/28/2018] [Accepted: 04/06/2018] [Indexed: 12/21/2022]
Abstract
Accumulating evidence suggests that placenta-specific 8 (PLAC8) plays an important role in normal cellular process and human diseases, including multiple types of human tumors, and its role is highly relied upon in cellular and physiologic contexts. However, there are no reports on its expression profile and biological roles during lung cancer development. In the current study, both the clinical implications and biological effects of PLAC8 in lung cancer (LC) progression were investigated, and we identified and described the novel Krüppel-like factor 4 (KLF4)/PLAC8 regulatory pathway in cancer progression. Elevated PLAC8 levels were positively correlated with tumor size, histological grade, and tumor node metasis (TNM) stage, and LC patients with high PLAC8 expression suffered poor outcomes. In vitro and in vivo assays further revealed that endogenous PLAC8 promoted cell proliferation and tumor formation. We also found downregulated PLAC8 protein in several LC cell lines following the induction of KLF4, and immunohistochemistry analysis of LC tissues by microarray indicated a potential inverse correlation between PLAC8 and KLF4 expression. Luciferase reporter analysis and chromatin immunoprecipitation assays determined that KLF4 negatively regulated PLAC8 promoter activity via directly binding to the promoter region. Furthermore, the growth inhibition resulting from KLF4 overexpression was partially rescued by ectopic PLAC8 expression. Together, our data uncovered a previously unidentified role of PLAC8 as a central mediator in LC progression. PLAC8 was transcriptionally repressed by KLF4, and the novel KLF4/PLAC8 axis may act as a promising candidate target for LC diagnosis and therapy.
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34
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MacDonagh L, Gray SG, Breen E, Cuffe S, Finn SP, O'Byrne KJ, Barr MP. BBI608 inhibits cancer stemness and reverses cisplatin resistance in NSCLC. Cancer Lett 2018; 428:117-126. [PMID: 29653268 DOI: 10.1016/j.canlet.2018.04.008] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 03/30/2018] [Accepted: 04/05/2018] [Indexed: 12/15/2022]
Abstract
Non-small cell lung cancer (NSCLC) is the most common cause of cancer-related deaths worldwide. While partial or complete tumor regression can be achieved in patients, particularly with cisplatin-based strategies, these initial responses are frequently short-lived and are followed by tumor relapse and chemoresistance. Identifying the root of cisplatin resistance in NSCLC and elucidating the mechanism(s) of tumor relapse, is of critical importance in order to determine the point of therapeutic failure, which in turn, will aid the discovery of novel therapeutics, new combination strategies and a strategy to enhance the efficacy of current chemotherapeutics. It has been hypothesized that cancer stem cells (CSCs) may be the initiating factor of resistance. We have previously identified and characterized an aldehyde dehydrogenase 1 CSC subpopulation in cisplatin resistant NSCLC. BBI608 is a small molecule STAT3 inhibitor known to suppress cancer relapse, progression and metastasis. Here, we show that BBI608 can inhibit stemness gene expression, deplete CSCs and overcome cisplatin resistance in NSCLC.
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Affiliation(s)
- Lauren MacDonagh
- Thoracic Oncology Research Group, School of Clinical Medicine, Trinity Translational Medicine Institute, Trinity Centre for Health Sciences, St. James's Hospital and Trinity College, Dublin, Ireland
| | - Steven G Gray
- Thoracic Oncology Research Group, School of Clinical Medicine, Trinity Translational Medicine Institute, Trinity Centre for Health Sciences, St. James's Hospital and Trinity College, Dublin, Ireland
| | - Eamon Breen
- Flow Cytometry Facility, Trinity Translational Medicine Institute, Trinity Centre for Health Sciences, St. James's Hospital and Trinity College, Dublin, Ireland
| | - Sinead Cuffe
- Thoracic Oncology Research Group, School of Clinical Medicine, Trinity Translational Medicine Institute, Trinity Centre for Health Sciences, St. James's Hospital and Trinity College, Dublin, Ireland; Medical Oncology, St. James's Hospital, Dublin, Ireland
| | - Stephen P Finn
- Thoracic Oncology Research Group, School of Clinical Medicine, Trinity Translational Medicine Institute, Trinity Centre for Health Sciences, St. James's Hospital and Trinity College, Dublin, Ireland; Department of Histopathology, St. James's Hospital and Trinity College, Dublin, Ireland
| | - Kenneth J O'Byrne
- Thoracic Oncology Research Group, School of Clinical Medicine, Trinity Translational Medicine Institute, Trinity Centre for Health Sciences, St. James's Hospital and Trinity College, Dublin, Ireland; Cancer & Ageing Research Program, Queensland University of Technology, Brisbane, Australia
| | - Martin P Barr
- Thoracic Oncology Research Group, School of Clinical Medicine, Trinity Translational Medicine Institute, Trinity Centre for Health Sciences, St. James's Hospital and Trinity College, Dublin, Ireland.
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35
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Ding X, Zhong T, Jiang L, Huang J, Xia Y, Hu R. miR-25 enhances cell migration and invasion in non-small-cell lung cancer cells via ERK signaling pathway by inhibiting KLF4. Mol Med Rep 2018; 17:7005-7016. [PMID: 29568911 PMCID: PMC5928655 DOI: 10.3892/mmr.2018.8772] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 12/08/2017] [Indexed: 01/10/2023] Open
Abstract
In recent years, microRNAs (miRNAs/miRs) have gained increasing interest in cancer research. Increasing evidences demonstrated that miRNAs are important for tumor early detection and prognosis. The present study aimed to explore the function of miR-25 in non-small-cell lung cancer (NSCLC) and its underlying mechanisms. The expression levels of miR-25 and Krüppel-like factor 4 (KLF4) were assessed in 31 pairs of tissue from patients with NSCLC. In addition, the biological roles of miR-25 in NSCLC were analyzed via a cell wound healing assay, Transwell invasion and migration assays. Target genes of miR-25 were predicted using TargetScan and verified via a dual luciferase activity assay, western blotting and reverse transcription-quantitative polymerase chain reaction. The downstream signaling pathway was confirmed by western blot analysis. In the present study, miR-25 was overexpressed in 31 NSCLC samples compared with in corresponding normal tissues. Overexpression of miR-25 using miR-25 mimics markedly promoted NSCLC cell migration and invasion, while inhibition of miR-25 exerted the opposite effect. KLF4 was suggested to be a novel target gene of miR-25 in NSCLC cells. Knockdown of KLF4 promoted the migration and invasion of NSCLC cells, whereas rescue of KLF4 expression reduced cell motion ability in miR-25-overexpressing NSCLC cells. Furthermore, it was demonstrated that miR-25 activated the extracellular signal-regulated kinase (ERK) signaling pathway, which eventually led to increased vimentin, matrix metalloproteinase 11 and N-cadherin levels, and the downregulation of E-cadherin expression by inhibiting the expression of KLF4. In conclusion, miR-25 was demonstrated to activate the ERK signaling pathway by directly targeting KLF4, promoting cell migration and invasion. The findings of the present study indicated that miR-25 or KLF4 may serve as a therapeutic target for the treatment of NSCLC.
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Affiliation(s)
- Xiaoli Ding
- Department of Laboratory Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
| | - Tianyu Zhong
- Department of Laboratory Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
| | - Lixia Jiang
- Department of Laboratory Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
| | - Junyun Huang
- Department of Laboratory Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
| | - Yu Xia
- Graduate Student Major of Laboratory Medicine of Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
| | - Rong Hu
- Department of Laboratory Medicine, First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi 341000, P.R. China
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Minami K, Taniguchi K, Sugito N, Kuranaga Y, Inamoto T, Takahara K, Takai T, Yoshikawa Y, Kiyama S, Akao Y, Azuma H. MiR-145 negatively regulates Warburg effect by silencing KLF4 and PTBP1 in bladder cancer cells. Oncotarget 2018; 8:33064-33077. [PMID: 28380435 PMCID: PMC5464850 DOI: 10.18632/oncotarget.16524] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 03/15/2017] [Indexed: 11/29/2022] Open
Abstract
The Warburg effect is a well-known feature in cancer-specific metabolism. We previously reported on the role of microRNA (miR)-145 as a tumor-suppressor in human bladder cancer (BC) cells. In this study, we reveal that miR-145 decreases the Warburg effect by silencing KLF4 in BC cells. The expression levels of miR-145 were significantly lower in clinical BC samples and BC cell lines compared to those in normal tissues and HUC cells. Luciferase assay results showed that miR-145 directly bound to 3′UTR of KLF4, which was shown to be overexpressed in the clinical BC samples using Western blot analysis and immunohistochemistry. Remarkable growth inhibition and apoptosis were induced by the ectopic expression of miR-145 or by the gene silencing of KLF4 (siR-KLF4). Also, Warburg effect-related genes such as PTBP1/PKMs were regulated by the transfection of BC cells with miR-145 or siR-KLF4. These results thus indicate that the miR-145/KLF4/PTBP1/PKMs axis is one of the critical pathways that maintain the Warburg effect in BC carcinogenesis. MiR-145 perturbed the Warburg effect by suppressing the KLF4/PTBP1/PKMs pathway in BC cells, resulting in significant cell growth inhibition.
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Affiliation(s)
- Koichiro Minami
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu 501-1193, Japan.,Department of Urology, Osaka Medical College, Takatsuki, Osaka 569-8686, Japan
| | - Kohei Taniguchi
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu 501-1193, Japan.,Department of General and Gastroenterological Surgery, Osaka Medical College, Takatsuki, Osaka 569-8686, Japan
| | - Nobuhiko Sugito
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu 501-1193, Japan
| | - Yuki Kuranaga
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu 501-1193, Japan
| | - Teruo Inamoto
- Department of Urology, Osaka Medical College, Takatsuki, Osaka 569-8686, Japan
| | - Kiyoshi Takahara
- Department of Urology, Osaka Medical College, Takatsuki, Osaka 569-8686, Japan
| | - Tomoaki Takai
- Department of Urology, Osaka Medical College, Takatsuki, Osaka 569-8686, Japan
| | - Yuki Yoshikawa
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu 501-1193, Japan.,Department of Urology, Osaka Medical College, Takatsuki, Osaka 569-8686, Japan
| | - Satoshi Kiyama
- Department of Urology, Osaka Medical College, Takatsuki, Osaka 569-8686, Japan
| | - Yukihiro Akao
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu 501-1193, Japan
| | - Haruhito Azuma
- Department of Urology, Osaka Medical College, Takatsuki, Osaka 569-8686, Japan
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Transcriptional repression of FOXO1 by KLF4 contributes to glioma progression. Oncotarget 2018; 7:81757-81767. [PMID: 27835585 PMCID: PMC5348427 DOI: 10.18632/oncotarget.13184] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Accepted: 10/19/2016] [Indexed: 01/08/2023] Open
Abstract
In this study, our findings indicated that FOXO1 expression frequently decreased in glioma tissues and cells. FOXO1 expression decrease correlated with glioma progression and predicted a worse overall survival of glioma patients. Restored FOXO1 expression inhibited glioma cells invasion and suppressed glioma cells proliferation in vitro and growth in vivo. Additionally, we found that KLF4 expression frequently increased in glioma tissues and negatively correlated with FOXO1 expression. Bioinformatics analysis and experimental results indicated that KLF4 transcriptionally repressed FOXO1 expression in glioma cells. Moreover, KLF4 expression increase correlated with glioma progression and predicted a poorer overall survival of glioma patients. KLF4 knockdown attenuated glioma cells invasion and growth. These data provide a rationale for targeted intervention on KLF4-FOXO1 signaling pathway to suppress glioma progression.
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38
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Chen X, Li S, Ke Y, Wu S, Huang T, Hu W, Fu H, Guo X. KLF16 suppresses human glioma cell proliferation and tumourigenicity by targeting TFAM. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2018; 46:608-615. [PMID: 29374989 DOI: 10.1080/21691401.2018.1431654] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Xiangrong Chen
- Department of Neurosurgery, The Second Affiliated Hospital, Fujian Medical University, Quanzhou, PR China
| | - Shun Li
- Department of Neurosurgery, Affiliated Hospital of North Sichuan Medical College, Nanchong, PR China
| | - Yumin Ke
- Department of Obstetrics and Gynaecology, The Second Affiliated Hospital, Fujian Medical University, Quanzhou, PR China
| | - Shukai Wu
- Department of Neurosurgery, The Second Affiliated Hospital, Fujian Medical University, Quanzhou, PR China
| | - Tianzao Huang
- Department of Neurosurgery, The Second Affiliated Hospital, Fujian Medical University, Quanzhou, PR China
| | - Weipeng Hu
- Department of Neurosurgery, The Second Affiliated Hospital, Fujian Medical University, Quanzhou, PR China
| | - Huangde Fu
- Department of Neurosurgery, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, PR China
| | - Xieli Guo
- Department of Neurosurgery, The Jinjiang Municipal Hospital, Quanzhou, PR China
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39
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Hu W, Jia Y, Xiao X, Lv K, Chen Y, Wang L, Luo X, Liu T, Li W, Li Y, Zhang C, Yu Z, Huang W, Sun B, Deng WG. KLF4 downregulates hTERT expression and telomerase activity to inhibit lung carcinoma growth. Oncotarget 2018; 7:52870-52887. [PMID: 27153563 PMCID: PMC5288155 DOI: 10.18632/oncotarget.9141] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 04/16/2016] [Indexed: 12/12/2022] Open
Abstract
Krüppel-like factor 4 (KLF4) is a transcription factor that contributes to diverse cellular processes and serves as a tumor suppressor or oncogene in various cancers. Previously, we have reported on the tumor suppressive function of KLF4 in lung cancer; however, its precise regulatory mechanism remains elusive. In this study, we found that KLF4 negatively regulated hTERT expression and telomerase activity in lung cancer cell lines and a mouse model. In addition, the KLF4 and hTERT expression levels were significantly related to the clinicopathological features of lung cancer patients. Promoter reporter analyses revealed the decreased hTERT promoter activity in cells infected with Ad-KLF4, and chromatin immunoprecipitation analysis demonstrated that endogenous KLF4 directly bound to the promoter region of hTERT. Furthermore, the MAPK signaling pathway was revealed to be involved in the KLF4/hTERT modulation pathway. Forced expression of KLF4 profoundly attenuated lung cell proliferation and cancer formation in a murine model. Moreover, hTERT overexpression can partially rescue the KLF4-mediated suppressive effect in lung cancer cells. Taken together, these results demonstrate that KLF4 suppresses lung cancer growth by inhibiting hTERT and MAPK signaling. Additionally, the KLF4/hTERT/MAPK pathway is a potential new therapeutic target for human lung cancer.
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Affiliation(s)
- Wenxian Hu
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Yunlu Jia
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Xiangsheng Xiao
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Kezhen Lv
- Department of Breast Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Yongxia Chen
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Linbo Wang
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Xiao Luo
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Tianze Liu
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Wenbin Li
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Yixin Li
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Changlin Zhang
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Zhenglong Yu
- Department of Thoracic Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Wenlin Huang
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China.,State Key Laboratory of Targeted Drug for Tumors of Guangdong Province, Guangzhou Double Bioproduct Inc., Guangzhou, China
| | - Bing Sun
- Department of Thoracic Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Wu-Guo Deng
- Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China.,State Key Laboratory of Targeted Drug for Tumors of Guangdong Province, Guangzhou Double Bioproduct Inc., Guangzhou, China
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40
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Karam J, Fadous-Khalifé MC, Tannous R, Fakhreddine S, Massoud M, Hadchity J, Aftimos G, Hadchity E. Role of Krüppel-like factor 4 and heat shock protein 27 in cancer of the larynx. Mol Clin Oncol 2017; 7:808-814. [PMID: 29181170 DOI: 10.3892/mco.2017.1412] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 06/07/2017] [Indexed: 12/27/2022] Open
Abstract
Late detection and lack of standard treatment strategies in larynx cancer patients result in high levels of mortality and poor prognosis. Prognostic stratification of larynx cancer patients based on molecular prognostic tumor biomarkers may lead to more efficient clinical management. Krüppel-like factor 4 (KLF4) and Heat Shock Protein 27 (HSP27) have an important role in tumorigenesis and are considered promising candidate biomarkers for various types of cancer. However, their role in larynx carcinoma remains to be elucidated. The present study aimed to determine KLF4 and HSP27 expression profiles in laryngeal tumors. The protein and mRNA expression levels of KLF4 and HSP27 were evaluated by immunohistochemical and reverse transcription-polymerase chain reaction analyses in 44 larynx carcinoma samples and 21 normal tissue samples, and then correlated with clinical characteristics. A differential expression of KLF4 and HSP27 was observed between normal and tumor tissues. The protein and mRNA expression levels of KLF4 were significantly decreased in larynx squamous cell carcinoma (LSCC) compared with normal tissue, whereas HSP27 was significantly overexpressed in tumor tissues compared with normal tissues, at the protein and mRNA levels. KLF4 expression decreased gradually with tumor progression whereas HSP27 expression increased. A significant difference was observed between stages I and IV. KLF4 and HSP27 exhibit opposite functions and roles in the carcinogenic process of LSCC. Their role in laryngeal cancer initiation and progression emphasizes their use as potential future targets for prognosis and treatment. KLF4 and HSP27 expression levels may act as potential biomarkers in patients with cancer of the larynx.
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Affiliation(s)
- Jihad Karam
- Anti-Tumor Therapeutic Targeting Laboratory, Faculty of Sciences, Lebanese University, Hadat 1003, Lebanon
| | - Marie Claude Fadous-Khalifé
- Anti-Tumor Therapeutic Targeting Laboratory, Faculty of Sciences, Lebanese University, Hadat 1003, Lebanon.,Notre Dame de Secours University Hospital, Jbeil 1401, Lebanon
| | - Rita Tannous
- Anti-Tumor Therapeutic Targeting Laboratory, Faculty of Sciences, Lebanese University, Hadat 1003, Lebanon
| | - Sally Fakhreddine
- Anti-Tumor Therapeutic Targeting Laboratory, Faculty of Sciences, Lebanese University, Hadat 1003, Lebanon
| | - Marcel Massoud
- Notre Dame de Secours University Hospital, Jbeil 1401, Lebanon
| | - Joseph Hadchity
- Anti-Tumor Therapeutic Targeting Laboratory, Faculty of Sciences, Lebanese University, Hadat 1003, Lebanon.,Department of Surgery, St. Therese Hospital, Hadat 1003, Lebanon
| | | | - Elie Hadchity
- Anti-Tumor Therapeutic Targeting Laboratory, Faculty of Sciences, Lebanese University, Hadat 1003, Lebanon
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41
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Lin L, Han Q, Xiong Y, Li T, Liu Z, Xu H, Wu Y, Wang N, Liu X. Krüpple-like-factor 4 Attenuates Lung Fibrosis via Inhibiting Epithelial-mesenchymal Transition. Sci Rep 2017; 7:15847. [PMID: 29158503 PMCID: PMC5696468 DOI: 10.1038/s41598-017-14602-7] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 09/26/2017] [Indexed: 12/03/2022] Open
Abstract
Epithelial-mesenchymal transition (EMT) plays an important role in the pathogenesis of idiopathic pulmonary fibrosis (IPF). Krüpple-like-factor 4 (KLF4), has been suggested to play an important role in the phenotype transition. However, its function in pulmonary fibrosis and EMT of human alveolar epithelial cells (AECs) remains unclear. This study aimed to examine the role of KLF4 in pulmonary fibrosis and EMT. Decreased expression of KLF4 was first observed in human IPF lung tissues and models of bleomycin-induced pulmonary fibrosis. Transgenic mice with overexpression of KLF4 were subjected to bleomycin-induced pulmonary fibrosis model and showed attenuated lung fibrosis and EMT compared to wild type group. Furthermore, the effects overexpression and knockdown of KLF4 on TGF-β1-induced EMT were examined in AECs. Adenovirus-mediated overexpression of KLF4 attenuated TGF-β1-induced EMT and activation of Smad2/3 and Dvl in AECs. Conversely, knockdown of KLF4 promoted the activation of pathways above mentioned and TGF-β1-induced EMT. Our results demonstrates that KLF4 plays an important role in bleomycin-induced lung fibrosis through suppressing TGFβ1-induced EMT. Thus, it may serve as a potential target for the treatment of pulmonary fibrosis.
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Affiliation(s)
- Lianjun Lin
- The Geriatrics Department, Peking University First Hospital, Beijing, China
| | - Qian Han
- The Geriatrics Department, Peking University First Hospital, Beijing, China
| | - Yan Xiong
- The Pathology Department, Peking University First Hospital, Beijing, China
| | - Ting Li
- The Pathology Department, Peking University First Hospital, Beijing, China
| | - Zhonghui Liu
- The Geriatrics Department, Peking University First Hospital, Beijing, China
| | - Huiying Xu
- The Geriatrics Department, Peking University First Hospital, Beijing, China
| | - Yanping Wu
- The Geriatrics Department, Peking University First Hospital, Beijing, China
| | - Nanping Wang
- Key Laboratory of Molecular Cardiovascular Science of Ministry of Education, Peking University Health Science Center, Beijing, China.
| | - Xinmin Liu
- The Geriatrics Department, Peking University First Hospital, Beijing, China.
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42
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Schagdarsurengin U, Lammert A, Schunk N, Sheridan D, Gattenloehner S, Steger K, Wagenlehner F, Dansranjavin T. Impairment of IGF2 gene expression in prostate cancer is triggered by epigenetic dysregulation of IGF2-DMR0 and its interaction with KLF4. Cell Commun Signal 2017; 15:40. [PMID: 29017567 PMCID: PMC5633889 DOI: 10.1186/s12964-017-0197-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 10/05/2017] [Indexed: 01/29/2023] Open
Abstract
Background Human cancer cells often exhibit impaired IGF2 expression and the underlying mechanisms are multifaceted and complex. Besides the well-known imprinting control region IGF2/H19-ICR, the involvement of a differentially methylated region in the promoter P0 of IGF2 gene (IGF2-DMR0) has been suggested. Here, we evaluate several mechanisms potentially leading to up- and/or down-regulation of IGF2 expression in prostate cancer and present a novel role of Kruppel-like factor 4 (KLF4) as a transcriptional regulator of IGF2 binding in IGF2-DMR0. Methods Putative binding sites for transcription factors were identified in IGF2-DMR0 using JASPAR CORE database. Gene expressions were analyzed by RT-qPCR in prostate carcinoma and adjacent benign prostate hyperplasia samples obtained by radical prostatectomy (86 RP-PCa and 47 RP-BPH) and BPH obtained by transurethral prostate resection (13 TUR-BPH). Pyrosequencing and qMSP were used for DNA methylation studies in IGF2-DMR0, IGF2/H19-ICR and Glutathione-S-transferase-P1 (GSTP1) promoter. Loss of imprinting (LOI) was analyzed by RFLP. Copy number variation (CNV) test was performed using qBiomarker CNV PCR Assay. KLF4-binding and histone-modifications were analyzed by ChIP-qPCR in prostate cancer cell lines exhibiting differentially methylated IGF2-DMR0 (LNCaP hypomethylated and DU145 hypermethylated). KLF4 protein was analyzed by western blot. Statistical associations of gene expression to methylation, IGF2 LOI and CNV were calculated by Mann-Whitney-U-test. Correlations between gene expression and methylation levels were evaluated by Spearman’s-Rank-Correlation-test. Results We found a significant reduction of IGF2 expression in the majority of RP-PCa and RP-BPH in comparison to TUR-BPH. Analyzing potential molecular reasons, we found in RP-PCa and RP-BPH in comparison to TUR-BPH a significant hypomethylation of IGF2-DMR0, which coincided with hypermethylation of GSTP1-promoter, a prominent marker of prostate tumors. In contrast, IGF2 LOI and CNV did not associate significantly with up- and/or down-regulation of IGF2 expression in prostate tumors. By analyzing IGF2-DMR0, we detected a consensus sequence for KLF4 with a z-score of 7.6. Interestingly, we found that KLF4 binds to hypomethylated (17%) IGF2-DMR0 enriched with H3K9me3 and H3K27me3 (LNCaP), but does not bind under hypermethylated (85%) and H3K4me3-enriched conditions (DU145). KLF4 expression was detected in TUR-BPH as well as in RP-BPH and RP-PCa and showed a highly significant correlation to IGF2 expression. Conclusions Our study demonstrated that in human prostate cancer the impairment of IGF2 expression is accompanied by hypomethylation of IGF2-DMR0. We revealed that KLF4 is a putative transcriptional regulator of IGF2, which binds in IGF2-DMR0 in dependence of the prevailing epigenetic state in this region. Herewith we provide complementary new insights into IGF2 dysregulation mechanisms as a critical process in prostate tumorigenesis.
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Affiliation(s)
- Undraga Schagdarsurengin
- Clinic of Urology, Pediatric Urology and Andrology, Justus-Liebig-University Giessen, Rudolf-Buchheim-Str. 7, 35392, Giessen, Germany.,Epigenetics of Urogenital System, Justus-Liebig-University Giessen, Schubertstr. 81, 35392, Giessen, Germany
| | - Angela Lammert
- Department of Signal Transduction of Cellular Motility, Internal Medicine V, Justus-Liebig-University Giessen, Aulweg 128, 35392, Giessen, Germany
| | - Natalie Schunk
- Clinic of Urology, Pediatric Urology and Andrology, Justus-Liebig-University Giessen, Rudolf-Buchheim-Str. 7, 35392, Giessen, Germany
| | - Diana Sheridan
- Institute of Pathology, Justus-Liebig-University Giessen, Langhansstr. 10, 35392, Giessen, Germany
| | - Stefan Gattenloehner
- Institute of Pathology, Justus-Liebig-University Giessen, Langhansstr. 10, 35392, Giessen, Germany
| | - Klaus Steger
- Clinic of Urology, Pediatric Urology and Andrology, Justus-Liebig-University Giessen, Rudolf-Buchheim-Str. 7, 35392, Giessen, Germany.,Molecular Andrology, Justus-Liebig-University Giessen, Schubertstr. 81, 35392, Giessen, Germany
| | - Florian Wagenlehner
- Clinic of Urology, Pediatric Urology and Andrology, Justus-Liebig-University Giessen, Rudolf-Buchheim-Str. 7, 35392, Giessen, Germany
| | - Temuujin Dansranjavin
- Clinic of Urology, Pediatric Urology and Andrology, Justus-Liebig-University Giessen, Rudolf-Buchheim-Str. 7, 35392, Giessen, Germany.
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43
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Jia Y, Zhou J, Luo X, Chen M, Chen Y, Wang J, Xiong H, Ying X, Hu W, Zhao W, Deng W, Wang L. KLF4 overcomes tamoxifen resistance by suppressing MAPK signaling pathway and predicts good prognosis in breast cancer. Cell Signal 2017; 42:165-175. [PMID: 28988130 DOI: 10.1016/j.cellsig.2017.09.025] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 09/19/2017] [Accepted: 09/30/2017] [Indexed: 12/21/2022]
Abstract
Tamoxifen resistance represents a daunting challenge to the successful treatment for breast cancer. Krüppel-like factor 4 has critical roles in the development and progression of breast cancer, but its expression, function and regulation in the efficacy of TAM therapy in breast cancer have yet to be investigated. Here, we examined the clinical significance and biologic effects of KLF4 in breast cancer. Firstly, higher expression of KLF4 correlated with increased TAM sensitivity in breast cancer cells, and analysis of GEO datasets indicated that KLF4 expression was positively correlated with ERα and enhanced expression of KLF4 sensitized breast cancer patients to endocrine therapy. Knockdown of KLF4 in MCF-7 and BCAP37 cells led to increased TAM resistance, while ectopic KLF4 expression promoted the responsiveness to TAM in T47D and TAM-resistant MCF-7/TAM cells. Secondly, ectopic KLF4 overexpression suppressed MCF-7/TAM cell growth, invasion and migration. Moreover, KLF4 expression was down-regulated in breast cancer tumor tissues and high expression of KLF4 was associated with favorable outcomes. Mechanistically, KLF4 may enhance the responsiveness of breast cancer cells to TAM through suppressing mitogen-activated protein kinase (MAPK) signaling pathway. We found that ERK and p38 were more activated in MCF-7/TAM compared with MCF-7, and treatment with MAPK-specific inhibitors significantly suppressed cell viability. Knockdown of KLF4 activated ERK and p38 and drove MCF-7 cells to become resistant to TAM. Conversely, overexpression of KLF4 in MCF-7/TAM cells suppressed ERK and p38 signaling and resulted in increased sensitivity to TAM. Therefore, our findings suggested that KLF4 contributed to TAM sensitivity in breast cancer via phosphorylation modification of ERK and p38 signaling. Collectively, this study highlighted the significance of KLF4/MAPK signal interaction in regulating TAM resistance of breast cancer, and suggested that targeting KLF4/MAPK signaling may be a potential therapeutic strategy for breast cancer treatment, especially for the TAM-resistant patients.
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Affiliation(s)
- Yunlu Jia
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, China
| | - Jichun Zhou
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, China
| | - Xiao Luo
- Department of Radiology, Second Affiliated Hospital, Zhejiang University, Hangzhou, China
| | - Miao Chen
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Yongxia Chen
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, China
| | - Ji Wang
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, China
| | - Hanchu Xiong
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, China
| | - Xiaogang Ying
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, China
| | - Wenxian Hu
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, China
| | - Wenhe Zhao
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, China.
| | - Wuguo Deng
- Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China.
| | - Linbo Wang
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, China.
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Li S, Huang L, Gu J, Wu J, Ou W, Feng J, Liu B, Xu X, Zhou Y. Restoration of KLF4 Inhibits Invasion and Metastases of Lung Adenocarcinoma through Suppressing MMP2. J Cancer 2017; 8:3480-3489. [PMID: 29151932 PMCID: PMC5687162 DOI: 10.7150/jca.21241] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 08/06/2017] [Indexed: 12/16/2022] Open
Abstract
Background: KLF4 is a zin-finger transcription factor that plays roles in differentiation, development, and proliferation. Recent studies show that KLF4 is involved in tumorigenesis and somatic cells reprogramming. Metastasis is the primary cause of death in patients with lung cancer, and its biological mechanisms are poorly understood. Goals: In this study, we aim to explore the expression pattern and biological function of KLF4 in lung adenocarcinoma. Methods: We determined KLF4 in lung adenocarcinoma tissue and cell lines, using immunohistochemistry and western blotting. And we further analyzed the correlation between KLF4 expression and clinicopathologic parameters. We restored KLF4 expression and studied its effect on lung adenocarcinoma cells in vivo and in vitro. Luciferase assay was used to study impact of KLF4 on activity of MMP2 promoter. Results: KLF4 is dramatically down-regulated in lung adenocarcinoma tissue and cell lines. Promoter methylation contributes to the down-regulation of KLF4. Down-regulation of KLF4 in lung adenocarcinoma tissue is significantly associated with reduced survival time. Restoration of KLF4 inhibits migration and invasion of lung adenocarcinoma cells in vitro. Metastases to lungs significantly decrease in mice intravenously injected with tumor cells overexpressing KLF4. KLF4 inhibits invasion and metastasis via suppressing MMP2 promoter activity. Conclusion: The ability of KLF4 to inhibit migration, invasion, and metastasis of lung tumor cells indicates a potential role of KLF4 as therapeutic target in lung adenocarcinoma. KLF4 might be utilized as a favorable biomarker for prognosis of lung adenocarcinoma patients.
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Affiliation(s)
- Shaoli Li
- Department of Respiratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Lixia Huang
- Department of Respiratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jincui Gu
- Department of Respiratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jian Wu
- Department of Respiratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Weijun Ou
- Center of Organ Transplantation, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jinglun Feng
- Department of Respiratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Baomo Liu
- Department of Respiratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xiaoxian Xu
- Department of Respiratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yanbin Zhou
- Department of Respiratory Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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45
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Song X, Xing YM, Wu W, Cheng GH, Xiao F, Jin G, Liu Y, Zhao X. Expression of Krüppel-like factor 4 in breast cancer tissues and its effects on the proliferation of breast cancer MDA-MB-231 cells. Exp Ther Med 2017; 13:2463-2467. [PMID: 28565864 DOI: 10.3892/etm.2017.4262] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 12/09/2016] [Indexed: 01/24/2023] Open
Abstract
The aim of the present study was to detect the expression of Krüppel-like factor 4 (KLF4) in breast cancer tissues and to evaluate the effect on the proliferation of breast cancer MDA-MB-231 cells. The expression of KLF4 protein in 239 breast cancer tissues and 40 paracancerous tissues were detected by an immunohistochemical assay, and its correlation with clinical pathological parameters was analyzed. A eukaryotic expression vector, pcDNA3.1-KLF4, was constructed by transient transfection of breast cancer MDA-MB-231 cells with liposomes (experimental group). The untransfected cells and those transfected with empty plasmid pcDNA3.1 were used as the blank and negative control groups, respectively. The expression of the KLF4 gene and protein in the three groups were detected by reverse transcription polymerase chain reaction and western blotting, respectively. Furthermore, the cell proliferative capacity was detected by an MTT assay. The positive expression rate of KLF4 protein in breast cancer tissues (39.0%, 93/239) was significantly lower than that of paracancerous tissues (77.5%, 31/40) (P<0.05). In addition, KLF4 protein expression in breast cancer tissues was correlated with pathological type, histological grade and lymphatic metastasis (P<0.05). KLF4 mRNA and protein were both expressed by the experimental group, but not by the two control groups. Meanwhile, the proliferative capacity of the experimental group was also significantly decreased. A significant decrease in the positive expression rate of KLF4 protein in breast cancer tissues was correlated with several clinical pathological parameters. In addition, transfection of the KLF4 gene inhibited the proliferation of breast cancer cells, suggesting that this gene is important in the onset and progression of this type of cancer.
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Affiliation(s)
- Xiang Song
- Department of Oncology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
| | - Yue-Ming Xing
- Department of Oncology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
| | - Wei Wu
- Department of Oncology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
| | - Guo-Hua Cheng
- Department of Oncology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
| | - Feng Xiao
- Department of Oncology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
| | - Gang Jin
- Department of Oncology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
| | - Ying Liu
- Department of Oncology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
| | - Xin Zhao
- Department of Oncology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China
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Liu S, Yang H, Chen Y, He B, Chen Q. Krüppel-Like Factor 4 Enhances Sensitivity of Cisplatin to Lung Cancer Cells and Inhibits Regulating Epithelial-to-Mesenchymal Transition. Oncol Res 2017; 24:81-7. [PMID: 27296948 PMCID: PMC7838665 DOI: 10.3727/096504016x14597766487717] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
In order to improve therapeutic efficacy, it is a current emergency to better know the mechanisms underlying cisplatin resistance in lung cancer cells. In this study, we aim to investigate the role of Krüppel-like factor 4 (KLF4) in cisplatin-resistant lung cancer cells. We developed cisplatin-resistant lung cancer cell line A549/DDP, and then a battery of experiments was used to analyze the effects of KLF4 in cisplatin resistance of lung cancer. We found that KLF4 was significantly downregulated in cisplatin-resistant A549 cells and forced KLF4 expression inhibited cell growth and induced apoptosis. Further, we found that overexpression of KLF4 was able to inhibit cell migration and invasion, to inhibit the expression of Slug, Twist, and vimentin, and to increase the expression of E-cadherin and subsequent inhibition of the EMT process. Thus, overexpression of KLF4 may be a potential strategy for lung cancer treatment, especially for cisplatin-resistant cases.
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Affiliation(s)
- Shenggang Liu
- Department of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China
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Li XY, Geng LY, Zhou XX, Wei N, Fang XS, Li Y, Wang X. Krüppel-like factor 4 contributes to the pathogenesis of mantle cell lymphoma. Leuk Lymphoma 2017; 58:2460-2469. [PMID: 28278702 DOI: 10.1080/10428194.2017.1292354] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Mantle cell lymphoma (MCL) is an aggressive subtype of B-cell non-Hodgkin lymphoma (NHL) with poor prognosis. Krüppel-like factor 4 (KLF4) has been reported as a bi-regulator in malignancies, but little is known about its role in MCL. Here, we showed that KLF4 was downregulated in three MCL cell lines and lymph nodes from MCL patients, which resulted in a negative prognosis. We also found that the regulation of KLF4 could inhibit the proliferation and induce apoptosis of Jeko-1 cells. The lentivirally over-expressed KLF4 protein was found bind to β-catenin and could inhibit downstream molecules such as cyclinD1 and c-Myc. Furthermore, 5-azacytidine could decrease the expression of methyltransferase-1 (DNMT-1) and restore the KLF4 expression in MCL cell lines, indicating that methylation might play an important role in the downregulation of KLF4. KLF4 may be a potential therapeutic target as a tumor suppressor in MCL.
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Affiliation(s)
- Xin-Yu Li
- a Department of Hematology , Shandong Provincial Hospital affiliated to Shandong University , Jinan , P.R. China
| | - Ling-Yun Geng
- a Department of Hematology , Shandong Provincial Hospital affiliated to Shandong University , Jinan , P.R. China
| | - Xiang-Xiang Zhou
- a Department of Hematology , Shandong Provincial Hospital affiliated to Shandong University , Jinan , P.R. China
| | - Na Wei
- a Department of Hematology , Shandong Provincial Hospital affiliated to Shandong University , Jinan , P.R. China
| | - Xiao-Sheng Fang
- a Department of Hematology , Shandong Provincial Hospital affiliated to Shandong University , Jinan , P.R. China
| | - Ying Li
- a Department of Hematology , Shandong Provincial Hospital affiliated to Shandong University , Jinan , P.R. China
| | - Xin Wang
- a Department of Hematology , Shandong Provincial Hospital affiliated to Shandong University , Jinan , P.R. China
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Yang Z, Li D, Liu Z, Miao X, Yang L, Zou Q, Yuan Y. BIRC7 and KLF4 expression in benign and malignant lesions of pancreas and their clinicopathological significance. Cancer Biomark 2017; 17:437-444. [PMID: 27802195 DOI: 10.3233/cbm-160660] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This study investigated the KLF4 and BIRC7 protein expression in malignant and benign pancreatic tissues by immunohistochemical staining and the clinical and pathological significance of KLF4 and BIRC7 expression in PDAC. KLF4 expression was significantly lower, whereas BIRC7 expression was significantly higher in PDAC than that in peritumoral tissue, benign pancreatic lesions, and normal pancreatic tissue (P < 0.01). The percentage of positive BIRC7 and negative KLF4 expression was significantly lower in PDAC patients with well differentiated tumors, maximum tumor size < 3 cm, no lymph node metastasis, no invasion to the surrounding tissues and organs, and TNM stage I/II stage disease than in patients with poorly differentiated tumor, maximum tumor size > 5 cm, lymph node metastasis, invasion to surrounding tissues and organs, and TNM stage III/IV disease (P < 0.05 or P < 0.01). Kaplan-Meier survival analysis showed that the differentiation, maximum tumor size, TNM stage, lymph node metastasis, invasion, negative KLF4 expression, and positive BIRC7 expression were significantly associated with the short survival of patients with PDAC (P < 0.05 or P < 0.01). Cox multivariate analysis revealed that positive BIRC7 expression and negative KLF4 expression were independent poor prognosis factors in PDAC patients. In conclusions, positive BIRC7 expression and negative KLF4 expression are associated with the progression of PDAC and poor prognosis in patients with PDAC.
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Affiliation(s)
- Zhulin Yang
- Research Laboratory of Hepatobiliary Diseases, Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Daiqiang Li
- Department of Pathology, Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Ziru Liu
- Research Laboratory of Hepatobiliary Diseases, Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xiongying Miao
- Research Laboratory of Hepatobiliary Diseases, Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Leping Yang
- Research Laboratory of Hepatobiliary Diseases, Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Qiong Zou
- Department of Pathology, Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yuan Yuan
- Department of Pathology, Third Xiangya Hospital, Central South University, Changsha, Hunan, China
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KLF4 expression enhances the efficacy of chemotherapy drugs in ovarian cancer cells. Biochem Biophys Res Commun 2017; 484:486-492. [DOI: 10.1016/j.bbrc.2017.01.062] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2017] [Accepted: 01/13/2017] [Indexed: 12/14/2022]
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