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Kou Y, Zhang Y, Rong X, Yang P, Wang C, Zhou Q, Liu H, Liu B, Li M. Simvastatin inhibits proliferation and promotes apoptosis of oral squamous cell carcinoma through KLF2 signal. J Oral Biosci 2023; 65:347-355. [PMID: 37625505 DOI: 10.1016/j.job.2023.08.006] [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: 07/10/2023] [Revised: 08/18/2023] [Accepted: 08/21/2023] [Indexed: 08/27/2023]
Abstract
OBJECTIVES This study aimed to explore the role and specific mechanism of the cholesterol-lowering drug simvastatin in inhibiting oral squamous cell carcinoma (OSCC). METHODS The proliferation, apoptosis, and migration levels of OSCC cells were detected by CCK8, quantitative real-time polymerase chain reaction, Western blot, colony formation, TdT-mediated dUTP Nick-End Labeling assay, and wound healing assay. The inhibitory effect of simvastatin in vivo was detected by a mouse xenograft tumor model. Immunohistochemistry and immunofluorescence staining were used to assess the KLF2 and β-catenin expressions in cells and tissues. RESULTS KLF2 expression in OSCC cells and tissues was downregulated. The addition of KLF2 inducer, GGTI298, inhibited the proliferation and migration of OSCC cells. Simvastatin played a role in inhibiting the proliferation and promoting the apoptosis of OSCC cells. Moreover, it inhibited β-catenin expression and promoted KLF2 expression in OSCC cells. KLF2 siRNA reversed the effect of simvastatin on the proliferation and apoptosis of OSCC cells. CONCLUSIONS KLF2, as a tumor suppressor gene, may be an important marker for diagnosing and treating OSCC. Simvastatin inhibits the progression of OSCC by regulating the KLF2 signal.
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Affiliation(s)
- Yuying Kou
- Department of Bone Metabolism, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan, China; Center of Osteoporosis and Bone Mineral Research, Shandong University, Jinan, China
| | - Yuan Zhang
- Department of Bone Metabolism, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan, China; Center of Osteoporosis and Bone Mineral Research, Shandong University, Jinan, China
| | - Xing Rong
- Department of Bone Metabolism, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan, China; Center of Osteoporosis and Bone Mineral Research, Shandong University, Jinan, China
| | - Panpan Yang
- Department of Bone Metabolism, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan, China; Center of Osteoporosis and Bone Mineral Research, Shandong University, Jinan, China
| | - Caijiao Wang
- Department of Bone Metabolism, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan, China; Center of Osteoporosis and Bone Mineral Research, Shandong University, Jinan, China
| | - Qin Zhou
- Department of Bone Metabolism, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan, China; Center of Osteoporosis and Bone Mineral Research, Shandong University, Jinan, China
| | - Hongrui Liu
- Department of Bone Metabolism, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan, China; Center of Osteoporosis and Bone Mineral Research, Shandong University, Jinan, China
| | - Bo Liu
- School of Clinical Medicine, Jining Medical University, Jining, China; Center of Osteoporosis and Bone Mineral Research, Shandong University, Jinan, China.
| | - Minqi Li
- Department of Bone Metabolism, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, Jinan, China; School of Clinical Medicine, Jining Medical University, Jining, China; Center of Osteoporosis and Bone Mineral Research, Shandong University, Jinan, China.
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2
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Chen XQ, Ma J, Xu D, Xiang ZL. Comprehensive analysis of KLF2 as a prognostic biomarker associated with fibrosis and immune infiltration in advanced hepatocellular carcinoma. BMC Bioinformatics 2023; 24:270. [PMID: 37386390 PMCID: PMC10308631 DOI: 10.1186/s12859-023-05391-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 06/17/2023] [Indexed: 07/01/2023] Open
Abstract
PURPOSE Most Hepatocellular carcinoma (HCC) patients are in advanced or metastatic stage at the time of diagnosis. Prognosis for advanced HCC patients is dismal. This study was based on our previous microarray results, and aimed to explore the promising diagnostic and prognostic markers for advanced HCC by focusing on the important function of KLF2. METHODS The Cancer Genome Atlas (TCGA), Cancer Genome Consortium database (ICGC), and the Gene Expression Comprehensive Database (GEO) provided the raw data of this study research. The cBioPortal platform, CeDR Atlas platform, and the Human Protein Atlas (HPA) website were applied to analyze the mutational landscape and single-cell sequencing data of KLF2. Basing on the results of single-cell sequencing analyses, we further explored the molecular mechanism of KLF2 regulation in the fibrosis and immune infiltration of HCC. RESULTS Decreased KLF2 expression was discovered to be mainly regulated by hypermethylation, and indicated a poor prognosis of HCC. Single-cell level expression analyses revealed KLF2 was highly expressed in immune cells and fibroblasts. The function enrichment analysis of KLF2 targets indicated the crucial association between KLF2 and tumor matrix. 33-genes related with cancer associated fibroblasts (CAFs) were collected to identify the significant association of KLF2 with fibrosis. And SPP1 was validated as a promising prognostic and diagnostic marker for advanced HCC patients. CXCR6 CD8+ T cells were noted as a predominant proportion in the immune microenvironment, and T cell receptor CD3D was discovered to be a potential therapeutic biomarker for HCC immunotherapy. CONCLUSION This study identified that KLF2 is an important factor promoting HCC progression by affecting the fibrosis and immune infiltration, highlighting its great potential as a novel prognostic biomarker for advanced HCC.
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Affiliation(s)
- Xue-Qin Chen
- Department of Radiation Oncology, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, 200120, China
| | - Jie Ma
- Department of Radiation Oncology, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, 200120, China
| | - Di Xu
- Department of Radiation Oncology, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, 200120, China
| | - Zuo-Lin Xiang
- Department of Radiation Oncology, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, 200120, China.
- Department of Radiation Oncology, Shanghai East Hospital Ji'an hospital, Jiangxi, 343000, China.
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3
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Giarrizzo M, LaComb JF, Bialkowska AB. The Role of Krüppel-like Factors in Pancreatic Physiology and Pathophysiology. Int J Mol Sci 2023; 24:ijms24108589. [PMID: 37239940 DOI: 10.3390/ijms24108589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/04/2023] [Accepted: 05/06/2023] [Indexed: 05/28/2023] Open
Abstract
Krüppel-like factors (KLFs) belong to the family of transcription factors with three highly conserved zinc finger domains in the C-terminus. They regulate homeostasis, development, and disease progression in many tissues. It has been shown that KLFs play an essential role in the endocrine and exocrine compartments of the pancreas. They are necessary to maintain glucose homeostasis and have been implicated in the development of diabetes. Furthermore, they can be a vital tool in enabling pancreas regeneration and disease modeling. Finally, the KLF family contains proteins that act as tumor suppressors and oncogenes. A subset of members has a biphasic function, being upregulated in the early stages of oncogenesis and stimulating its progression and downregulated in the late stages to allow for tumor dissemination. Here, we describe KLFs' function in pancreatic physiology and pathophysiology.
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Affiliation(s)
- Michael Giarrizzo
- Department of Medicine, Renaissance School of Medicine at Stony Brook University, Stony Brook, NY 11794, USA
| | - Joseph F LaComb
- Department of Medicine, Renaissance School of Medicine at Stony Brook University, Stony Brook, NY 11794, USA
| | - Agnieszka B Bialkowska
- Department of Medicine, Renaissance School of Medicine at Stony Brook University, Stony Brook, NY 11794, USA
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4
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Hu F, Ren Y, Wang Z, Zhou H, Luo Y, Wang M, Tian F, Zheng J, Du J, Pang G. Bioinformatics analysis of KLF2 as a potential prognostic factor in ccRCC and association with epithelial‑mesenchymal transition. Exp Ther Med 2022; 24:561. [PMID: 35978925 PMCID: PMC9366276 DOI: 10.3892/etm.2022.11498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 06/23/2022] [Indexed: 11/29/2022] Open
Abstract
Clear cell renal cell carcinoma (ccRCC) is a primary pathological subtype of RCC and has poor clinical outcome. Krüppel-like factors (KLFs), which are zinc-finger proteins, may be involved in ccRCC development and progression. KLFs belong to the zinc-finger family of DNA-binding transcription factors and regulate transcription of downstream target genes. KLFs are involved in cancer development. The present study aimed to investigate the role of KLFs in ccRCC prognosis. The Cancer Genome Atlas database and multifactorial analysis showed that KLFs were widely expressed in pan-cancers and KLF2 was an independent protective factor for ccRCC prognosis. Patients with low KLF2 expression had a low survival probability and expression of KLF2 was downregulated in patients with ccRCC with high pathological grade (II + III vs. I). In addition, western blot and reverse transcription-quantitative PCR revealed that KLF2 was expressed at low levels in ccRCC cell lines and overexpression of KLF2 inhibited cell migration. In addition, KLF2 expression was negatively correlated with methylation. KLF2 expression was elevated following treatment of ccRCC cells with DNA methyltransferase inhibitor. A prognostic risk index prediction model was constructed based on multiple Cox regression. The receiver operating characteristic curve was 0.780 (area under curve >0.5). Furthermore, Gene Ontology enrichment analysis showed that ‘cell adhesion’ and ‘junction’ were negatively correlated with KLF2 and that high-risk group exhibited significantly activated ‘epithelial-mesenchymal transition’. Western blot analysis showed that overexpression of KLF2 increased expression of E-cadherin, while decreasing levels of N-cadherin and vimentin. The present study highlighted the role of KLFs in ccRCC prognosis prediction and provides a research base for the search of validated prognostic biological markers for ccRCC.
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Affiliation(s)
- Fangfang Hu
- Department of Physiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Yan Ren
- Department of Human Anatomy, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Zunyun Wang
- The Second Affiliated Hospital, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, P.R. China
| | - Hui Zhou
- Department of Physiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Yumei Luo
- The Second Affiliated Hospital, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, P.R. China
| | - Minghua Wang
- The Second Affiliated Hospital, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, P.R. China
| | - Faqing Tian
- The Second Affiliated Hospital, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, P.R. China
| | - Jian Zheng
- The Second Affiliated Hospital, School of Medicine, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, P.R. China
| | - Juan Du
- Department of Physiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
| | - Gang Pang
- Department of Human Anatomy, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230032, P.R. China
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Wu N, Chen S, Luo Q, Jiang Z, Wang X, Li Y, Qiu J, Yu K, Yang Y, Zhuang J. Kruppel-like factor 2 acts as a tumor suppressor in human retinoblastoma. Exp Eye Res 2022; 216:108955. [DOI: 10.1016/j.exer.2022.108955] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 01/10/2022] [Accepted: 01/18/2022] [Indexed: 12/26/2022]
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Ling L, Wang HF, Li J, Li Y, Gu CD. Downregulated microRNA-92a-3p inhibits apoptosis and promotes proliferation of pancreatic acinar cells in acute pancreatitis by enhancing KLF2 expression. J Cell Biochem 2020; 121:3739-3751. [PMID: 31713921 DOI: 10.1002/jcb.29517] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Accepted: 10/10/2019] [Indexed: 01/24/2023]
Abstract
Acute pancreatitis (AP) is known worldwide as one of the most common gastrointestinal diseases, prospectively leading to hospitalization coupled with increasing incidence. Several microRNAs (miRNAs) have been reported to be potential biomarkers for pancreatitis. In this study, we verified the hypothesis that miR-92a-3p is implicated in the development of AP by controlling the proliferation and apoptosis of pancreatic acinar cells (PACs) through the modulation of the Kruppel-like factor 2 (KLF2) and inflammatory factors in rats. Initially, we established a rat model of AP and extracted the pancreatic tissues. Then, the positive rate of KLF2 was measured using immunohistochemistry, and the expression of the related genes was determined by rReverse transcription quantitative polymerase chain reaction and Western blot analysis. The cell proliferation and apoptosis were measured by 5-ethynyl-2'-deoxyuridine assay and flow cytometry, and the contents of inflammatory factors were measured using enzyme-linked immunosorbent assay. AP rats presented with increased miR-92a-3p expression as well as decreased KLF2 expression in PACs. The downregulation of miR-92a-3p and overexpression of KLF2 led to decline in expression of nuclear factor-κB (NF-κB), survivin, tumor necrosis factor-α, and Bax as well as extent of NF-κB phosphorylation, contents of inflammatory factors, and apoptosis rate of PACs, but to increased KLF2 and B-cell lymphoma-2 levels and proliferation rate of PACs. Collectively, the data obtained from the present study demonstrated that reduced miR-92a-3p expression may relieve AP through its suppressive effects on cell apoptosis, inflammatory factors, and facilitatory effects on cell proliferation by enhancing KLF2 expression.
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Affiliation(s)
- Lan Ling
- Emergency Department, China-Japan Friendship Hospital, Beijing, China
| | - Hai-Feng Wang
- Nephropathy Department, China-Japan Friendship Hospital, Beijing, China
| | - Jing Li
- Nephropathy Department, China-Japan Friendship Hospital, Beijing, China
| | - Yan Li
- Emergency Department, China-Japan Friendship Hospital, Beijing, China
| | - Cheng-Dong Gu
- Emergency Department, China-Japan Friendship Hospital, Beijing, China
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DT-13 induced apoptosis and promoted differentiation of acute myeloid leukemia cells by activating AMPK-KLF2 pathway. Pharmacol Res 2020; 158:104864. [PMID: 32416217 DOI: 10.1016/j.phrs.2020.104864] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 04/08/2020] [Accepted: 04/24/2020] [Indexed: 02/08/2023]
Abstract
Acute myeloid leukemia (AML) is a malignant disease originating from hematopoietic stem cells (HSC). Chemotherapy and/or HSC transplantation is unsatisfactory due to serious side effects, multidrug resistance, and high relapse rate. Thus, alternative strategies are urgently needed to develop more effective therapies. Liriope muscari baily saponins C (DT-13) is a novel compound isolated from Liriope muscari (Decne.) Baily, and exhibited a potent cytotoxicity against several solid tumors. However, the anti-AML activity of DT-13 and the potential mechanisms are still unknown. This study is the first to demonstrate that DT-13 had preferential cytotoxicity against AML cells, and remarkably inhibited proliferation and colony forming ability. Moreover, DT-13 induced the death receptor pathway-dependent apoptosis of HL-60 and Kasumi-1 cells by up-regulating Fas, FasL, DR5 and TRAIL as well as promoted the cleavage of caspase 8, caspase 3 and PARP. Meanwhile, DT-13 induced the differentiation with morphological change related to myeloid differentiation, elevated NBT and α-NAE positive cell rates, differentiation markers CD11b and CD14 as well as level of transcription factors C/EBPα and C/EBPβ. RNA-sequencing analysis revealed that KLF2 may be one of the potential targets regulated by DT-13. Further studies indicated that KLF2 played a critical role in DT-13-induced apoptosis and differentiation. Moreover, activation of AMPK-FOXO was proved to be the upstream of KLF2 pathway that contributed to the induction of apoptosis and differentiation by DT-13. Additionally, restoration of KLF2 by DT-13 was highly correlated with the AMPK-related histone acetylation mechanisms. Finally, DT-13 exhibited an obvious anti-AML effect in NOD/SCID mice with the engraftment of HL-60 cells. Our study suggests that DT-13 may serve as a novel agent for AML by AMPL-KLF2-mediated apoptosis and differentiation.
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8
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Wu L, Gong Y, Yan T, Zhang H. LINP1 promotes the progression of cervical cancer by scaffolding EZH2, LSD1, and DNMT1 to inhibit the expression of KLF2 and PRSS8. Biochem Cell Biol 2020; 98:591-599. [PMID: 32348690 DOI: 10.1139/bcb-2019-0446] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
There is a growing body of evidence indicating that long non-coding RNAs (lncRNAs) are associated with a variety of cancers. LncRNA LINP1 has been shown to be a key factor in tumor malignancy. However, the role of LINP1 in cervical cancer (CC) it is unclear. In our research, we found that the levels of LINP1 were significantly elevated in CC tissues by comparison with adjacent normal tissue. Further, the expression level of LINP1 was upregulated in CC cells compared with healthy human cervical epithelial cell lines (HUCEC). Surprisingly, we found that downregulation of LINP1 significantly reduced the proliferation of CC cells and promoted apoptosis. Additionally, downregulation of LINP1 significantly decreased CC tumor growth in vivo. Further, we observed that LINP1 recruits EZH2, LSD1, and DNMT1, thereby reducing the expression of KLF2 and PRSS8. The results from our qRT-PCR analyses showed that silencing LINP1 uprgulated the expression of KLF2 and PRSS8 in CC cells. The results from our loss-of-function assays showed that upregulation of KLF2 and PRSS8 inhibits cell proliferation and boosts cell apoptosis in CC. We also found that inhibition of KLF2 and PRSS8 reversed the inhibitory effect on cell proliferation associated with silencing LINP1. In short, LINP1 facilitates the progression of CC by suppressing KLF2 and PRSS8, and thus could provide a promising target for CC therapy.
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Affiliation(s)
- Liuli Wu
- Medical College of Guizhou University, Guiyang 550025, Guizhou, P.R. China
| | - Yuan Gong
- Department of Gynaecology, Guizhou Provincial People's Hospital, Guiyang 550002, Guizhou, P.R. China
| | - Ting Yan
- Department of Gynaecology, Guizhou Provincial People's Hospital, Guiyang 550002, Guizhou, P.R. China
| | - Huimin Zhang
- Medical College of Guizhou University, Guiyang 550025, Guizhou, P.R. China.,Department of Gynaecology, Guizhou Provincial People's Hospital, Guiyang 550002, Guizhou, P.R. China
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9
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Yuedi D, Houbao L, Pinxiang L, Hui W, Min T, Dexiang Z. KLF2 induces the senescence of pancreatic cancer cells by cooperating with FOXO4 to upregulate p21. Exp Cell Res 2020; 388:111784. [PMID: 31866399 DOI: 10.1016/j.yexcr.2019.111784] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 12/16/2019] [Accepted: 12/17/2019] [Indexed: 02/02/2023]
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10
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Yoon JH, Min K, Lee SK. Epstein-Barr Virus miR-BART17-5p Promotes Migration and Anchorage-Independent Growth by Targeting Kruppel-Like Factor 2 in Gastric Cancer. Microorganisms 2020; 8:microorganisms8020258. [PMID: 32075248 PMCID: PMC7074886 DOI: 10.3390/microorganisms8020258] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 02/12/2020] [Accepted: 02/13/2020] [Indexed: 12/24/2022] Open
Abstract
Epstein-Barr virus (EBV) infects more than 90% of the global population and is associated with a variety of tumors including nasopharyngeal carcinoma, Hodgkin lymphoma, natural killer/T lymphoma, and gastric carcinoma. In EBV-associated gastric cancer (EBVaGC), highly expressed EBV BamHI A rightward transcripts (BART) miRNAs may contribute to tumorigenesis with limited viral antigens. Despite previous studies on the targets of BART miRNAs, the functions of all 44 BART miRNAs have not been fully clarified. Here, we used RNA sequencing data from the Cancer Genome Atlas to find genes with decreased expression in EBVaGC. Furthermore, we used AGS cells infected with EBV to determine whether expression was reduced by BART miRNA. We showed that the expression of Kruppel-like factor 2 (KLF2) is lower in AGS-EBV cells than in the AGS control. Using bioinformatics analysis, four BART miRNAs were selected to check whether they suppress KLF2 expression. We found that only miR-BART17-5p directly down-regulated KLF2 and promoted gastric carcinoma cell migration and anchorage-independent growth. Our data suggest that KLF2 functions as a tumor suppressor in EBVaGC and that miR-BART17-5p may be a valuable target for effective EBVaGC treatment.
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Affiliation(s)
| | | | - Suk Kyeong Lee
- Correspondence: ; Tel.: +82-2-2258-7480; Fax: +82-504-201-2396
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11
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Lin J, Tan H, Nie Y, Wu D, Zheng W, Lin W, Zhu Z, Yang B, Chen X, Chen T. Krüppel-like factor 2 inhibits hepatocarcinogenesis through negative regulation of the Hedgehog pathway. Cancer Sci 2019; 110:1220-1231. [PMID: 30719823 PMCID: PMC6447955 DOI: 10.1111/cas.13961] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 01/24/2019] [Accepted: 01/30/2019] [Indexed: 12/18/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is one of the most common malignancies worldwide. The most important reason for the occurrence of HCC is hepatitis C or B infection. Moreover, genetic factors play an important role in the tumorigenesis of HCC. Here, we demonstrated that Krüppel-like factor 2 (KLF2) expression was downregulated in HCC samples compared with adjacent tissues. Additionally, KLF2 was shown to inhibit the growth, migration and colony-formation ability of liver cancer cells. Further mechanistic studies revealed that KLF2 can compete with Gli1 for interaction with HDAC1 and restrains Hedgehog signal activation. Together, our results suggest that KLF2 has potential as a diagnostic biomarker and therapeutic target for the treatment of HCC.
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Affiliation(s)
- JinBo Lin
- Longgang Central Hospital of Shenzhen, Affiliated Longgang Hospital of Zunyi Medical University, Shenzhen, China
| | - Huifang Tan
- The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yingjie Nie
- Clinical Research Lab Center, Guizhou Provincial People's Hospital, Guiyang, China
| | - Dongwen Wu
- The Third Xiangya Hospital, Central South University, Changsha, China
| | - Weiji Zheng
- Longgang Central Hospital of Shenzhen, Affiliated Longgang Hospital of Zunyi Medical University, Shenzhen, China
| | - Wensong Lin
- Longgang Central Hospital of Shenzhen, Affiliated Longgang Hospital of Zunyi Medical University, Shenzhen, China
| | - Zheng Zhu
- Longgang Central Hospital of Shenzhen, Affiliated Longgang Hospital of Zunyi Medical University, Shenzhen, China
| | - Bing Yang
- Longgang Central Hospital of Shenzhen, Affiliated Longgang Hospital of Zunyi Medical University, Shenzhen, China
| | - Xiaoliang Chen
- Shenzhen Guangming District Center for Disease Control and Prevention, Guangdong, China
| | - Tao Chen
- The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Clinical Research Lab Center, Guizhou Provincial People's Hospital, Guiyang, China
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12
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Wang B, Liu M, Song Y, Li C, Zhang S, Ma L. KLF2 Inhibits the Migration and Invasion of Prostate Cancer Cells by Downregulating MMP2. Am J Mens Health 2018; 13:1557988318816907. [PMID: 30520325 PMCID: PMC6775556 DOI: 10.1177/1557988318816907] [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] [Indexed: 12/15/2022] Open
Abstract
KLF2, a member of the Kruppel-like factor (KLF) family, is thought to be a tumor suppressor in many kinds of malignant tumors. Its functions in prostate cancer (PCa) are unknown. This study aimed to explore the role of KLF2 in the migration and invasion of PCa cells. The expression of KLF2 was measured by immunohistochemistry in PCa tissues and in paired non-tumor tissues. KLF2 and MMP2 expression in cells was measured by Western blot and RT-qPCR. Adenoviruses and siRNAs were used in cell function tests to investigate the role of KLF2 in regulating MMP2. Interactions between KLF2 and MMP2 were analyzed by a luciferase activity assay. The present study, for the first time, identified that KLF2 was downregulated both in PCa clinical tissue samples and in cancer cell lines. The overexpression of KLF2 inhibited the migration and invasion of PCa cells via the suppression of MMP2.This study demonstrates that KLF2 might act as a tumor suppressor gene in PCa and that the pharmaceutical upregulation of KLF2 may be a potential approach for treatment.
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Affiliation(s)
- Binshuai Wang
- 1 Department of Urology, Peking University Third Hospital, Beijing, China
| | - Mingyuan Liu
- 2 Department of Vascular Surgery, Peking University People's Hospital, Beijing, China
| | - Yimeng Song
- 1 Department of Urology, Peking University Third Hospital, Beijing, China
| | - Changying Li
- 3 Tianjin Institute of Urology, Second Hospital of Tianjin Medical University, Tianjin, China
| | - Shudong Zhang
- 1 Department of Urology, Peking University Third Hospital, Beijing, China
| | - Lulin Ma
- 1 Department of Urology, Peking University Third Hospital, Beijing, China
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Lian Y, Yang J, Lian Y, Xiao C, Hu X, Xu H. DUXAP8, a pseudogene derived lncRNA, promotes growth of pancreatic carcinoma cells by epigenetically silencing CDKN1A and KLF2. Cancer Commun (Lond) 2018; 38:64. [PMID: 30367681 PMCID: PMC6235391 DOI: 10.1186/s40880-018-0333-9] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 10/08/2018] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Recent studies highlight pseudogene derived long non-coding RNAs (lncRNAs) as key regulators of cancer biology. However, few of them have been well characterized in pancreatic cancer. Here, we aimed to identify the association between pseudogene derived lncRNA DUXAP8 and growth of pancreatic cancer cells. METHODS We screened for pseudogene derived lncRNAs associated with human pancreatic cancer by comparative analysis of three independent datasets from GEO. Quantitative real-time reverse transcription polymerase chain reaction was used to assess the relative expression of DUXAP8 in pancreatic cancer tissues and cells. Loss-of-function approaches were used to investigate the potential functional roles of DUXAP8 in pancreatic cancer cell proliferation and apoptosis in vitro and in vivo. RNA immunoprecipitation, chromosome immunoprecipitation assay and rescue experiments were performed to analyze the association of DUXAP8 with target proteins and genes in pancreatic cancer cells. RESULTS Pancreatic cancer tissues had significantly higher DUXAP8 levels than paired adjacent normal tissues. High DUXAP8 expression was associated with a larger tumor size, advanced pathological stage and shorter overall survival of pancreatic cancer patients. Moreover, silencing DUXAP8 expression by siRNA or shRNA inhibited pancreatic cancer cell proliferation and promoted apoptosis in vitro and in vivo. Mechanistic analyses indicated that DUXAP8 regulates PC cell proliferation partly through downregulation of tumor suppressor CDKN1A and KLF2 expression. CONCLUSION Our results suggest that tumor expression of pseudogene derived lncRNA DUXAP8 plays an important role in pancreatic cancer progression. DUXAP8 may serve as a candidate biomarker and represent a novel therapeutic target of pancreatic cancer.
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Affiliation(s)
- Yifan Lian
- Department of Gastroenterology, Zhongshan Hospital, Xiamen University, Xiamen, 361005, Fujian, P. R. China.,Institute for Microbial Ecology, Xiamen University, Xiamen, 361005, Fujian, P. R. China
| | - Jiebin Yang
- Department of Gastroenterology, Zhongshan Hospital, Xiamen University, Xiamen, 361005, Fujian, P. R. China.,Institute for Microbial Ecology, Xiamen University, Xiamen, 361005, Fujian, P. R. China
| | - Yikai Lian
- Department of Gastroenterology, Zhongshan Hospital, Xiamen University, Xiamen, 361005, Fujian, P. R. China.,Institute for Microbial Ecology, Xiamen University, Xiamen, 361005, Fujian, P. R. China
| | - Chuangxing Xiao
- Department of Gastroenterology, Zhongshan Hospital, Xiamen University, Xiamen, 361005, Fujian, P. R. China.,Institute for Microbial Ecology, Xiamen University, Xiamen, 361005, Fujian, P. R. China
| | - Xuezhen Hu
- Jiangsu Province Hospital of TCM, Affiliated Hospital of Nanjing University of TCM, Nanjing, 210029, Jiangsu, P. R. China.
| | - Hongzhi Xu
- Department of Gastroenterology, Zhongshan Hospital, Xiamen University, Xiamen, 361005, Fujian, P. R. China. .,Institute for Microbial Ecology, Xiamen University, Xiamen, 361005, Fujian, P. R. China.
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14
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Xu Y, Yao Y, Jiang X, Zhong X, Wang Z, Li C, Kang P, Leng K, Ji D, Li Z, Huang L, Qin W, Cui Y. SP1-induced upregulation of lncRNA SPRY4-IT1 exerts oncogenic properties by scaffolding EZH2/LSD1/DNMT1 and sponging miR-101-3p in cholangiocarcinoma. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2018; 37:81. [PMID: 29642935 PMCID: PMC5896100 DOI: 10.1186/s13046-018-0747-x] [Citation(s) in RCA: 116] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 04/02/2018] [Indexed: 01/10/2023]
Abstract
Background Accumulating evidence has indicated that long non-coding RNAs (lncRNAs) behave as a novel class of transcription products during multiple cancer processes. However, the mechanisms responsible for their alteration in cholangiocarcinoma (CCA) are not fully understood. Methods The expression of SPRY4-IT1 in CCA tissues and cell lines was determined by RT-qPCR, and the association between SPRY4-IT1 transcription and clinicopathologic features was analyzed. Luciferase reporter and chromatin immunoprecipitation (ChIP) assays were performed to explore whether SP1 could bind to the promoter region of SPRY4-IT1 and activate its transcription. The biological function of SPRY4-IT1 in CCA cells was evaluated both in vitro and in vivo. ChIP, RNA binding protein immunoprecipitation (RIP) and luciferase reporter assays were performed to determine the molecular mechanism of SPRY4-IT1 in cell proliferation, apoptosis and invasion. Results SPRY4-IT1 was abnormally upregulated in CCA tissues and cells, and this upregulation was correlated with tumor stage and tumor node metastasis (TNM) stage in CCA patients. SPRY4-IT1 overexpression was also an unfavorable prognostic factor for patients with CCA. Additionally, SP1 could bind directly to the SPRY4-IT1 promoter region and activate its transcription. Furthermore, SPRY4-IT1 silencing caused tumor suppressive effects via reducing cell proliferation, migration and invasion; inducing cell apoptosis and reversing the epithelial-to-mesenchymal transition (EMT) process in CCA cells. Mechanistically, enhancer of zeste homolog 2 (EZH2) along with the lysine specific demethylase 1 (LSD1) or DNA methyltransferase 1 (DNMT1) were recruited by SPRY4-IT1, which functioned as a scaffold. Importantly, SPRY4-IT1 positively regulated the expression of EZH2 through sponging miR-101-3p. Conclusions Our data illustrate how SPRY4-IT1 plays an oncogenic role in CCA and may offer a potential therapeutic target for treating CCA. Electronic supplementary material The online version of this article (10.1186/s13046-018-0747-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yi Xu
- Department of Hepatopancreatobiliary Surgery, Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, People's Republic of China
| | - Yue Yao
- Department of Endocrinology and Metabolism, Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, People's Republic of China
| | - Xingming Jiang
- Department of Hepatopancreatobiliary Surgery, Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, People's Republic of China
| | - Xiangyu Zhong
- Department of Hepatopancreatobiliary Surgery, Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, People's Republic of China
| | - Zhidong Wang
- Department of Hepatopancreatobiliary Surgery, Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, People's Republic of China
| | - Chunlong Li
- Department of Hepatopancreatobiliary Surgery, Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, People's Republic of China
| | - Pengcheng Kang
- Department of Hepatopancreatobiliary Surgery, Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, People's Republic of China
| | - Kaiming Leng
- Department of Hepatopancreatobiliary Surgery, Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, People's Republic of China
| | - Daolin Ji
- Department of Hepatopancreatobiliary Surgery, Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, People's Republic of China
| | - Zhenglong Li
- Department of Hepatopancreatobiliary Surgery, Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, People's Republic of China
| | - Lining Huang
- Department of Hepatopancreatobiliary Surgery, Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, People's Republic of China
| | - Wei Qin
- Department of Hepatopancreatobiliary Surgery, Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, People's Republic of China
| | - Yunfu Cui
- Department of Hepatopancreatobiliary Surgery, Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, People's Republic of China.
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15
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Wehrkamp CJ, Natarajan SK, Mohr AM, Phillippi MA, Mott JL. miR-106b-responsive gene landscape identifies regulation of Kruppel-like factor family. RNA Biol 2018; 15:391-403. [PMID: 29286255 DOI: 10.1080/15476286.2017.1422471] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
MicroRNA dysregulation is a common feature of cancer and due to the promiscuity of microRNA binding this can result in a wide array of genes whose expression is altered. miR-106b is an oncomiR overexpressed in cholangiocarcinoma and its upregulation in this and other cancers often leads to repression of anti-tumorigenic targets. The goal of this study was to identify the miR-106b-regulated gene landscape in cholangiocarcinoma cells using a genome-wide, unbiased mRNA analysis. Through RNA-Seq we found 112 mRNAs significantly repressed by miR-106b. The majority of these genes contain the specific miR-106b seed-binding site. We have validated 11 genes from this set at the mRNA level and demonstrated regulation by miR-106b of 7 proteins. Combined analysis of our miR-106b-regulated mRNA data set plus published reports indicate that miR-106b binding is anchored by G:C pairing in and near the seed. Novel targets Kruppel-like factor 2 (KLF2) and KLF6 were verified both at the mRNA and at the protein level. Further investigation showed regulation of four other KLF family members by miR-106b. We have discovered coordinated repression of multiple members of the KLF family by miR-106b that may play a role in cholangiocarcinoma tumor biology.
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Affiliation(s)
- Cody J Wehrkamp
- a Department of Biochemistry and Molecular Biology , Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center , Omaha
| | - Sathish Kumar Natarajan
- a Department of Biochemistry and Molecular Biology , Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center , Omaha
| | - Ashley M Mohr
- a Department of Biochemistry and Molecular Biology , Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center , Omaha
| | - Mary Anne Phillippi
- a Department of Biochemistry and Molecular Biology , Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center , Omaha
| | - Justin L Mott
- a Department of Biochemistry and Molecular Biology , Fred & Pamela Buffett Cancer Center, University of Nebraska Medical Center , Omaha
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16
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Abstract
Pancreatic cancers arise through a series of genetic events both inherited and acquired. Inherited genetic changes, both high penetrance and low penetrance, are an important component of pancreatic cancer risk, and may be used to characterize populations who will benefit from early detection. Furthermore, pancreatic cancer patients with inherited mutations may be particularly sensitive to certain targeted agents, providing an opportunity to personalized treatment. Family history of pancreatic cancer is one of the strongest risk factors for the disease, and is associated with an increased risk of caners at other sites, including but not limited to breast, ovarian and colorectal cancer. The goal of this chapter is to discuss the importance of family history of pancreatic cancer, and the known genes that account for a portion of the familial clustering of pancreatic cancer.
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Affiliation(s)
- Fei Chen
- Department of Epidemiology, The Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Nicholas J Roberts
- Department of Pathology, Department of Oncology, The Sol Goldman Pancreatic Cancer Research Center, The Johns Hopkins Medical Institution, Baltimore, MD, USA
| | - Alison P Klein
- Department of Epidemiology, The Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Department of Pathology, Department of Oncology, The Sol Goldman Pancreatic Cancer Research Center, The Johns Hopkins Medical Institution, Baltimore, MD, USA.
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17
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Wang C, Li L, Duan Q, Wang Q, Chen J. Krüppel-like factor 2 suppresses human gastric tumorigenesis through inhibiting PTEN/AKT signaling. Oncotarget 2017; 8:100358-100370. [PMID: 29245984 PMCID: PMC5725026 DOI: 10.18632/oncotarget.22229] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 10/05/2017] [Indexed: 02/06/2023] Open
Abstract
Krüppel-like factors (KLFs) are a large family of DNA-binding transcriptional regulators that affect basic cellular processes such as growth, survival, migration and differentiation and serve a complicated function in cancers. KLF2, one member of the KLF family, is dysregulated in many tumors. However, the specific role of KLF2 in human gastric tumorigenesis is unknown. Here we show that the expression of KLF2 protein was lower in gastric tumors when compared with adjacent normal tissue. Moreover, downregulated KLF2 expression in primary gastric tumor was closely correlated with patients’ survival. Various cell experiments showed that ectopic KLF2 expression suppressed the proliferation, migration and invasion of gastric cancer cells. Moreover, KLF2 overexpression remarkably enhanced cell apoptosis and induced cell cycle arrest. Impaired expression of KLF2 markedly promoted cell growth in vitro and significantly expanded tumor size in vivo. Mechanically, the mRNA and protein level of PTEN was reduced in KLF2 deficient cells and xenograft tumors, suggesting that PTEN/AKT signaling was involved in the gastric tumor inhibitory effect of KLF2. Administration of AKT inhibitor AZD5363 or Insulin-like growth factor-1 (IGF-1) in KLF2 knockdown or ectopic expression cell lines, respectively, substantially reversed the proliferation phenotype. Collectively, our findings provide clinical evidence and a potential mechanism supporting that KLF2 suppresses human gastric tumorigenesis through inhibiting the PTEN/AKT axis.
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Affiliation(s)
- Chunmei Wang
- East China Normal University and Shanghai Fengxian District Central Hospital Joint Center for Translational Medicine, Shanghai 200241, China.,Department of Gastroenterology, Affiliated Fengxian Hospital of Southern Medical University, Shanghai 201499, China.,Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Liang Li
- East China Normal University and Shanghai Fengxian District Central Hospital Joint Center for Translational Medicine, Shanghai 200241, China
| | - Qiuhui Duan
- East China Normal University and Shanghai Fengxian District Central Hospital Joint Center for Translational Medicine, Shanghai 200241, China
| | - Qingqing Wang
- Department of Gastroenterology, Affiliated Fengxian Hospital of Anhui University of Science and Technology, Shanghai 201499, China
| | - Jinlian Chen
- East China Normal University and Shanghai Fengxian District Central Hospital Joint Center for Translational Medicine, Shanghai 200241, China.,Department of Gastroenterology, Affiliated Fengxian Hospital of Southern Medical University, Shanghai 201499, China
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18
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Ma Z, Huang H, Wang J, Zhou Y, Pu F, Zhao Q, Peng P, Hui B, Ji H, Wang K. Long non-coding RNA SNHG15 inhibits P15 and KLF2 expression to promote pancreatic cancer proliferation through EZH2-mediated H3K27me3. Oncotarget 2017; 8:84153-84167. [PMID: 29137412 PMCID: PMC5663584 DOI: 10.18632/oncotarget.20359] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 05/29/2017] [Indexed: 01/17/2023] Open
Abstract
Long non-coding RNA (lncRNA) is emerging as an critical regulator in multiple cancers, including pancreatic cancer (PC). Recently, lncRNA SNHG15 was found to be up-regulated in gastric cancer and hepatocellular carcinoma, exerting oncogenic effects. Nevertheless, the biological function and regulatory mechanism of SNHG15 remain unclear in pancreatic cancer (PC). In this study, we reported that SNHG15 expression was also upregulated in PC tissues, and its overexpression was remarkably associated with tumor size, tumor node metastasis (TNM) stage and lymph node metastasis in patients with PC. SNHG15 knockdown inhibited proliferative capacities and suppressed apoptotic rate of PC cells in vitro, and impaired in-vivo tumorigenicity. Additionally, RNA immunoprecipitation (RIP) assays showed that SNHG15 epigenetically repressed the P15 and Kruppel-like factor 2 (KLF2) expression via binding to enhancer of zeste homolog 2 (EZH2), and chromatin immunoprecipitation assays (CHIP) assays demonstrated that EZH2 was capable of binding to promoter regions of P15 and KLF2 to induce histone H3 lysine 27 trimethylation (H3K27me3). Furthermore, rescue experiments indicated that SNHG15 oncogenic function partially involved P15 and KLF2 repression. Consistently, an inverse correlation between the expression of SNHG15 and traget genes were found in PC tissues. Our results reported that SNHG15 could act as an oncogene in PC, revealing its potential value as a biomarker for early detection and individualized therapy.
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Affiliation(s)
- Zhonghua Ma
- The Second Clinical Medical College of Nanjing Medical University, Nanjing 210000, Jiangsu, People's Republic of China.,Department of Oncology, Second Affiliated Hospital, Nanjing Medical University, Nanjing 210000, Jiangsu, People's Republic of China
| | - Hesuyuan Huang
- Department of Cardiothoracic Surgery, Children's Hospital of Nanjing Medical University, Nanjing 210008, Jiangsu, People's Republic of China.,Department of General Surgery, Second Affiliated Hospital, Nanjing Medical University, Nanjing 210000, Jiangsu, People's Republic of China
| | - Jirong Wang
- Department of Oncology, Second Affiliated Hospital, Nanjing Medical University, Nanjing 210000, Jiangsu, People's Republic of China
| | - Yan Zhou
- Department of Oncology, The Affiliated Yixing Hospital of Jiangsu University, Wuxi 214200, Jiangsu, People's Republic of China
| | - Fuxing Pu
- Department of Medical Center for Digestive Diseases, Second Affiliated Hospital, Nanjing Medical University, Nanjing 210000, Jiangsu, People's Republic of China
| | - Qinghong Zhao
- Department of General Surgery, Second Affiliated Hospital, Nanjing Medical University, Nanjing 210000, Jiangsu, People's Republic of China
| | - Peng Peng
- Department of Oncology, Second Hospital of Nanjing, Nanjing 210000, Jiangsu, People's Republic of China
| | - Bingqing Hui
- The Second Clinical Medical College of Nanjing Medical University, Nanjing 210000, Jiangsu, People's Republic of China.,Department of Oncology, Second Affiliated Hospital, Nanjing Medical University, Nanjing 210000, Jiangsu, People's Republic of China
| | - Hao Ji
- The Second Clinical Medical College of Nanjing Medical University, Nanjing 210000, Jiangsu, People's Republic of China.,Department of Oncology, Second Affiliated Hospital, Nanjing Medical University, Nanjing 210000, Jiangsu, People's Republic of China
| | - Keming Wang
- The Second Clinical Medical College of Nanjing Medical University, Nanjing 210000, Jiangsu, People's Republic of China.,Department of Oncology, Second Affiliated Hospital, Nanjing Medical University, Nanjing 210000, Jiangsu, People's Republic of China
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19
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Kim CK, He P, Bialkowska AB, Yang VW. SP and KLF Transcription Factors in Digestive Physiology and Diseases. Gastroenterology 2017; 152:1845-1875. [PMID: 28366734 PMCID: PMC5815166 DOI: 10.1053/j.gastro.2017.03.035] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 03/21/2017] [Accepted: 03/24/2017] [Indexed: 12/14/2022]
Abstract
Specificity proteins (SPs) and Krüppel-like factors (KLFs) belong to the family of transcription factors that contain conserved zinc finger domains involved in binding to target DNA sequences. Many of these proteins are expressed in different tissues and have distinct tissue-specific activities and functions. Studies have shown that SPs and KLFs regulate not only physiological processes such as growth, development, differentiation, proliferation, and embryogenesis, but pathogenesis of many diseases, including cancer and inflammatory disorders. Consistently, these proteins have been shown to regulate normal functions and pathobiology in the digestive system. We review recent findings on the tissue- and organ-specific functions of SPs and KLFs in the digestive system including the oral cavity, esophagus, stomach, small and large intestines, pancreas, and liver. We provide a list of agents under development to target these proteins.
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Affiliation(s)
- Chang-Kyung Kim
- Department of Medicine, Stony Brook University School of Medicine, Stony Brook, NY
| | - Ping He
- Department of Medicine, Stony Brook University School of Medicine, Stony Brook, NY
| | - Agnieszka B. Bialkowska
- Department of Medicine, Stony Brook University School of Medicine, Stony Brook, NY,Corresponding Authors: Vincent W. Yang & Agnieszka B. Bialkowska, Department of Medicine, Stony Brook University School of Medicine, HSC T-16, Rm. 020; Stony Brook, NY, USA. Tel: (631) 444-2066; Fax: (631) 444-3144; ;
| | - Vincent W. Yang
- Department of Medicine, Stony Brook University School of Medicine, Stony Brook, NY,Department of Physiology and Biophysics, Stony Brook University School of Medicine, Stony Brook, NY,Corresponding Authors: Vincent W. Yang & Agnieszka B. Bialkowska, Department of Medicine, Stony Brook University School of Medicine, HSC T-16, Rm. 020; Stony Brook, NY, USA. Tel: (631) 444-2066; Fax: (631) 444-3144; ;
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20
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Fang R, Xu J, Lin H, Xu X, Tian F. The histone demethylase lysine-specific demethylase-1-mediated epigenetic silence of KLF2 contributes to gastric cancer cell proliferation, migration, and invasion. Tumour Biol 2017; 39:1010428317698356. [PMID: 28381185 DOI: 10.1177/1010428317698356] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Gastric cancer is one of the most common malignancies and leading causes of cancer-related death worldwide. An increasing number of evidence has revealed that gastric tumorigenesis is a multistage pathological state, and epigenetic alterations are considered to play critical roles in the etiology of gastric cancer. Lysine-specific demethylase-1, a histone demethylase, has been linked to malignancy in several human cancers and considered to epigenetically regulate many tumor suppressor genes during tumorigenesis and cancer progression. However, its role and underlying targets in gastric cancer are still unclear. In this study, we detected the lysine-specific demethylase-1 expression level in gastric cancer tissues and cell lines and investigated the function and mechanism of lysine-specific demethylase-1 in the gastric cancer. The in vitro analysis shows that knockdown of lysine-specific demethylase-1 significantly inhibits gastric cancer cell proliferation, migration, and invasion and induces cell cycle G1 phase arrest and cell apoptosis. In vivo assays determine that lysine-specific demethylase-1 downregulation represses gastric cancer cell tumorigenesis. Mechanistic investigation reveals that tumor suppressor KLF2 is a key downstream target of lysine-specific demethylase-1 in gastric cancer. These findings indicate that lysine-specific demethylase-1 is an important oncogene in gastric cancer, and lysine-specific demethylase-1-mediated epigenetic repression of KLF2 plays a critical role in gastric cancer development and progression, which supports lysine-specific demethylase-1 as a potential therapeutic target in this disease.
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Affiliation(s)
- Ruizhong Fang
- 1 Department of Hyperbaric Oxygen, Yishui Central Hospital, Linyi, People's Republic of China
| | - Jian Xu
- 2 Department of Gastroenterology, Yishui Central Hospital, Linyi, People's Republic of China
| | - Hai Lin
- 2 Department of Gastroenterology, Yishui Central Hospital, Linyi, People's Republic of China
| | - Xiaoguang Xu
- 2 Department of Gastroenterology, Yishui Central Hospital, Linyi, People's Republic of China
| | - Feng Tian
- 2 Department of Gastroenterology, Yishui Central Hospital, Linyi, People's Republic of China
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21
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Lian Y, Wang J, Feng J, Ding J, Ma Z, Li J, Peng P, De W, Wang K. Long non-coding RNA IRAIN suppresses apoptosis and promotes proliferation by binding to LSD1 and EZH2 in pancreatic cancer. Tumour Biol 2016; 37:14929-14937. [PMID: 27644252 DOI: 10.1007/s13277-016-5380-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 09/09/2016] [Indexed: 12/23/2022] Open
Abstract
Long non-coding RNA (lncRNA) modulates gene expression, while lncRNA dysregulation is associated with human cancer. Furthermore, while recent studies have shown that lncRNA IRAIN plays an important role in other malignancies, the role of IRAIN in pancreatic cancer (PC) progression remains unclear. In this study, we found that upregulation of lncRNA IRAIN was significantly correlated with tumor size, TNM stage, and lymph node metastasis in a cohort of 37 PC patients. In vitro experiments showed that knockdown of IRAIN by small interfering RNA (siRNA) significantly induced cell apoptosis and inhibited cell proliferation in both BxPC-3 and PANC-1 cells. Further mechanism study showed that, by binding to histone demethylase lysine-specific demethylase 1 (LSD1), an enhancer of zeste homolog 2 (EZH2), IRAIN reduced PC tumor cell apoptosis and induced growth arrest by silencing the expression of Kruppel-like factor 2 (KLF2) and P15. Moreover, IRAIN expression was inversely correlated with that of KLF2 and P15 in PC tissues. To our knowledge, this is the first report elucidating the role and mechanism of IRAIN in PC progression.
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Affiliation(s)
- Yifan Lian
- Department of Oncology, Second Affiliated Hospital, Nanjing Medical University, Nanjing, 210000, Jiangsu, People's Republic of China
| | - Juan Wang
- Department of Oncology, Second Affiliated Hospital, Nanjing Medical University, Nanjing, 210000, Jiangsu, People's Republic of China
| | - Jing Feng
- Department of Oncology, First Affiliated Hospital of Nanjing Medical University, Nanjing, 210000, Jiangsu, People's Republic of China
| | - Jie Ding
- Department of Oncology, Second Affiliated Hospital, Nanjing Medical University, Nanjing, 210000, Jiangsu, People's Republic of China
| | - Zhonghua Ma
- Department of Oncology, Second Affiliated Hospital, Nanjing Medical University, Nanjing, 210000, Jiangsu, People's Republic of China
| | - Juan Li
- Department of Oncology, Second Affiliated Hospital, Nanjing Medical University, Nanjing, 210000, Jiangsu, People's Republic of China
| | - Peng Peng
- Department of Oncology, The Second Hospital of Nanjing, Nanjing, 210000, Jiangsu, People's Republic of China
| | - Wei De
- Department of Biochemistry and Molecular Biology, Nanjing Medical University, Nanjing, 210000, Jiangsu, People's Republic of China
| | - Keming Wang
- Department of Oncology, Second Affiliated Hospital, Nanjing Medical University, Nanjing, 210000, Jiangsu, People's Republic of China.
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