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Kruppel

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https://www.readbyqxmd.com/read/28641818/the-role-of-kr%C3%A3-ppel-like-factor-14-in-the-pathogenesis-of-atherosclerosis
#1
REVIEW
Wei Xie, Liang Li, Xi-Long Zheng, Wei-Dong Yin, Chao-Ke Tang
The Krüppel-like factor (KLF) family, as the SP/XKLF transcription factors, plays important roles in regulating the expression of genes required for the proper execution of important biological and pathological processes. Recent studies have demonstrated that KLF14, a member of the KLF family, participates in the initiation and progression of atherosclerotic cardiovascular disease (CVD). From the molecular function aspect, this review focuses on the impact of KLF14-mediated regulation in major atherosclerosis-related diseases and pathological processes, such as insulin resistance, type 2 diabetes, dyslipidemia, inflammation, obesity, metabolic syndrome, cell proliferation and differentiation...
June 7, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28639905/high-expression-of-kruppel-like-factor-4-as-a-predictor-of-poor-prognosis-for-cervical-cancer-patient-response-to-radiotherapy
#2
Hai-Xia Liu, Na Li, Li Wei, Fu-Xing Zhou, Rui Ma, Feng Xiao, Wei Zhang, Ying Zhang, Yan-Ping Hui, Hui Song, Bi-Liang Chen
PURPOSE: The aim of this study was to explore the associations of Kruppel-like factor 4 expression with sensitivity to radiation therapy in locally advanced cervical squamous cell carcinoma patients. METHODS: The records of 117 locally advanced cervical squamous cell carcinoma patients were retrospectively reviewed, and Kruppel-like factor 4 expression in cervical carcinoma tissues was examined by immunohistochemical staining. The associations of Kruppel-like factor 4 expression with clinicopathological parameters were analyzed...
June 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28638268/klf6-inhibited-oral-cancer-migration-and-invasion-via-downregulation-of-mesenchymal-markers-and-inhibition-of-mmp-9-activities
#3
Li-Sung Hsu, Ren-Hung Huang, Hung-Wen Lai, Hui-Ting Hsu, Wen-Wei Sung, Ming-Ju Hsieh, Chong-Yu Wu, Yueh-Min Lin, Mu-Kuan Chen, Yu-Sheng Lo, Chih-Jung Chen
Krüppel-like factors can bind to specific DNA motifs and regulate various cellular functions, such as metabolism, cell proliferation, and differentiation. Krüppel-like factor 6 (KLF6), a member of this family, is downregulated in human cancers. Oral cancer is a highly prevalent type in Taiwan. Although KLF6 overexpression in human cancer cells inhibits cell proliferation, induces apoptosis, and attenuates cell migration, the effects of KLF6 on oral cancer remains poorly elucidated. This study investigated the role of KLF6 in oral cancer tumorigenesis...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28631556/kruppel-like-factor-4-inhibits-non-small-cell-lung-cancer-cell-growth-and-aggressiveness-by-stimulating-transforming-growth-factor-%C3%AE-1-meidated-erk-jnk-nf-%C3%AE%C2%BAb-signaling-pathways
#4
Renzhi Yu, Lei Han, Xin Ni, Minghuan Wang, Ping Xue, Li Zhang, Mei Yuan
Non-small cell lung cancer is one of the most common epithelial tumors that cause the most common cancer-related mortality due to invasive ability. Research has found that Kruppel-like factor 4, a zinc-finger transcription factor, plays a critical role in the tumor evolution and progression. However, the molecular signal pathways mediated by Kruppel-like factor 4 in the progression of non-small cell lung cancer cells have not been well understood yet. In this study, we investigated the possible role and potential mechanism of Kruppel-like factor 4 in growth and aggressiveness of non-small cell lung cancer cells...
June 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28630282/desumoylation-of-gli1-by-senp1-attenuates-sonic-hedgehog-signaling
#5
Huaize Liu, Sen Yan, Jie Ding, Ting-Ting Yu, Steven Y Cheng
Transcriptional output of the Sonic hedgehog morphogenic pathway is orchestrated by three Krüppel family transcription factors, Gli1-3, which undergo extensive post-translational modifications, including ubiquitination and SUMOylation. Here, we report that sentrin-specific peptidase SENP1 is the specific de-SUMOylation enzyme for Gli1. We show that SUMOylation stabilizes Gli1 by competing with ubiquitination at conserved lysine residues, and SUMOylated Gli1 is enriched in the nucleus, suggesting that SUMOylation is a nuclear localization signal for Gli1...
June 19, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28628187/klf2-inhibits-cell-growth-via-regulating-hif-1%C3%AE-notch-1-signal-pathway-in-human-colorectal-cancer-hct116-cells
#6
Hai-Gang Wang, Bin Cao, Li-Xian Zhang, Nan Song, Hui Li, Wen-Zeng Zhao, Yan-Shu Li, Shun-Mao Ma, Dong-Jian Yin
The transcription factor Krüppel-like factor 2 (KLF2) has been shown to function as a tumor suppressor and regulate biological processes of cancer cells, such as cell growth, cell apoptosis and angiogenesis. However, the function and mechanism of KLF2 in colorectal cancer (CRC) is still unknown. In the present study, we show that the expression of KLF2 is diminished in a cohort of CRC cell lines. Also, KLF2 overexpression remarkably inhibits HCT116 and SW480 cell survival and proliferation. Moreover, cell death detection ELISA plus assay showed that KLF2 overexpression increased HCT116 cell proliferation...
July 2017: Oncology Reports
https://www.readbyqxmd.com/read/28624536/microrna-dependent-regulation-of-metamorphosis-and-identification-of-micrornas-in-the-red-flour-beetle-tribolium-castaneum
#7
Wei Wu, Wenfeng Xiong, Chengjun Li, Mengfan Zhai, Yao Li, Fei Ma, Bin Li
To date, although some microRNAs (miRNAs) have been discovered in the holometabolism insect Tribolium castaneum, large numbers of miRNAs still require investigation. Knocking down Dicer-1 (Dcr-1) and Argonaute-1 (Ago-1) in late larvae impaired miRNA synthesis, affected the juvenile hormone pathway by up-regulating Methoprene-tolerant (Met) and Krüppel-homolog1 (Kr-h1) transcript levels, and resulted in a series of defects in T. castaneum development and metamorphosis. Thus, high-throughput Illumina/Solexa sequencing was performed with a mixed sample of eight key developmental stages of T...
June 14, 2017: Genomics
https://www.readbyqxmd.com/read/28612526/-mir-155-inhibits-the-expression-of-mmps-in-hk2-cells-by-targeting-klf4
#8
Ya-Xian Ning, Jian-Qin Wang, Xiao-Yuan Wang
OBJECTIVES: To determine whether miR -155 inhibits the expression of matrix metalloproteinase 2 (MMP-2) and matrix metalloproteinase 9 (MMP-9) in HK2 cells by targeting Kruppel-like factor 4 (KLF4). METHODS: MiR -155-mimic, miR -155-NC empty plasmid, and culture medium were transfected into renal tubular epithelial cells, respectively. Six hours later, the expression of miR -155 was detected by real time-PCR; the expressions of MMP-2, MMP-9 and KLF4 were detected by Western blot; and the activity of MMP-2 and MMP-9 in the cells was detected by gelatin zymography...
March 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/28611032/genome-wide-dynamics-of-nascent-noncoding-rna-transcription-in-porcine-heart-after-myocardial-infarction
#9
Minna U Kaikkonen, Paavo Halonen, Oscar Hsin-Fu Liu, Tiia A Turunen, Juho Pajula, Pierre Moreau, Ilakya Selvarajan, Tomi Tuomainen, Einari Aavik, Pasi Tavi, Seppo Ylä-Herttuala
BACKGROUND: Microarrays and RNA sequencing are widely used to profile transcriptome remodeling during myocardial ischemia. However, the steady-state RNA analysis lacks in sensitivity to detect all noncoding RNA species and does not provide separation between transcriptional and post-transcriptional regulations. Here, we provide the first comprehensive analysis of nascent RNA profiles of mRNAs, primary micro-RNAs, long noncoding RNAs, and enhancer RNAs in a large animal model of acute infarction...
June 2017: Circulation. Cardiovascular Genetics
https://www.readbyqxmd.com/read/28600522/direct-competition-between-dna-binding-factors-highlights-the-role-of-kr%C3%A3-ppel-like-factor-1-in-the-erythroid-megakaryocyte-switch
#10
Laura J Norton, Samantha Hallal, Elizabeth S Stout, Alister P W Funnell, Richard C M Pearson, Merlin Crossley, Kate G R Quinlan
The Krüppel-like factor (KLF) family of transcription factors play critical roles in haematopoiesis. KLF1, the founding member of the family, has been implicated in the control of both erythropoiesis and megakaryopoiesis. Here we describe a novel system using an artificial dominant negative isoform of KLF1 to investigate the role of KLF1 in the erythroid/megakaryocytic switch in vivo. We developed murine cell lines stably overexpressing a GST-KLF1 DNA binding domain fusion protein (GST-KLF1 DBD), as well as lines expressing GST only as a control...
June 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28599486/knockout-of-kr%C3%A3-ppel-like-factor-10-suppresses-hepatic-cell-proliferation-in-a-partially-hepatectomized-mouse-model
#11
Seung-Ho Heo, Eui-Suk Jeong, Kyoung-Sun Lee, Jin-Hee Seo, Woon-Kyu Lee, Yang-Kyu Choi
The liver has marked regenerative capabilities, and numerous signaling pathways are involved in liver regeneration. The transforming growth factor-β (TGF-β)/Smad pathway, which is also involved in liver regeneration, regulates numerous biological processes. Krüppel-like factor 10 (KLF10) has been reported to activate the TGF-β/Smad signaling pathway; however, the exact functions of KLF10 under various pathophysiological conditions remain unclear. In the present study, the role of KLF10 in liver regeneration following partial hepatectomy (PH) was investigated using KLF10-knockout (KO) mice...
June 2017: Oncology Letters
https://www.readbyqxmd.com/read/28581520/klf10-loss-in-the-pancreas-provokes-activation-of-sdf-1-and-induces-distant-metastases-of-pancreatic-ductal-adenocarcinoma-in-the-kras-g12d-p53-flox-flox-model
#12
C-C Weng, J R Hawse, M Subramaniam, V H S Chang, W C Y Yu, W-C Hung, L-T Chen, K-H Cheng
Krüppel-like transcription factor 10 (KLF10), also named as TIEG1, plays essential roles in mediating transforming growth factor beta (TGFβ) signaling and has been shown to function as a tumor suppressor in multiple cancer types. However, its roles in mediating cancer progression in vivo have yet to be fully characterized. Here, we have employed two well-characterized Pdx-1CreLSL-Kras(G12D) and Pdx-1CreLSL-Kras(G12D)p53(L/L) pancreatic cancer models to ablate KLF10 expression and determine the impact of KLF10 deletion on tumor development and progression...
June 5, 2017: Oncogene
https://www.readbyqxmd.com/read/28578476/lipopolysaccharide-downregulates-kruppel-like-factor-2-klf2-via-inducing-dnmt1-mediated-hypermethylation-in-endothelial-cells
#13
Zhonghai Yan, Yan Deng, Fei Jiao, Junqi Guo, Hailong Ou
KLF2 plays a protective role in antiinflammation and endothelial function, and can be regulated by promoter methylation alteration. Lipopolysaccharide (LPS) is a mediator of inflammatory responses, which causes epigenetic change of certain genes in host cells. We thus aimed to determine whether LPS could control the KLF2 expression by inducing methylation in promoter region. DNA methylation of 16 CpG sites within KLF2 promoter region was detected by bisulfite sequencing PCR. Results showed that methylation at 12 CpG sites were significantly increased in HUVECs after exposure to LPS among the total 16 sites, and the average level was increased by 57%...
June 3, 2017: Inflammation
https://www.readbyqxmd.com/read/28572744/berberine-regulates-the-protein-expression-of-multiple-tumorigenesis-related-genes-in-hepatocellular-carcinoma-cell-lines
#14
Tung-Yueh Chuang, Hsiao-Li Wu, Jie Min, Michael Diamond, Ricardo Azziz, Yen-Hao Chen
BACKGROUND: Hepatocellular carcinoma (HCC) is the seventh most common malignancy and the third leading cause of cancer-related death worldwide with an extremely grim prognosis. Berberine (BBR) has been found to inhibit proliferation of human HCC cells, although the underlying mechanism(s) are unclear. METHODS: Protein expression was detected by Western blots. Cell viability was determined by using the CellTiter Assay kit. RESULTS: We confirm that BBR treatment inhibits HepG2, Hep3B, and SNU-182 cell viability, and suggest that it regulates this proliferation via the modulation of multiple tumorigenesis-related genes protein expression...
2017: Cancer Cell International
https://www.readbyqxmd.com/read/28572540/analysis-of-region-specific-gene-expression-patterns-in-the-heart-and-systemic-responses-after-experimental-myocardial-ischemia
#15
Matthias Zimmermann, Lucian Beer, Robert Ullrich, Dominika Lukovic, Elisabeth Simader, Denise Traxler, Tanja Wagner, Lucas Nemec, Lukas Altenburger, Andreas Zuckermann, Mariann Gyöngyösi, Hendrik Jan Ankersmit, Michael Mildner
AIMS: Ischemic myocardial injury leads to the activation of inflammatory mechanisms and results in ventricular remodeling. Although great efforts have been made to unravel the molecular and cellular processes taking place in the ischemic myocardium, little is known about the effects on the surrounding tissue and other organs. The aim of this study was to determine region specific differences in the myocardium and in distant organs after experimental myocardial infarction by using a bioinformatics approach...
May 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/28565864/expression-of-kr%C3%A3-ppel-like-factor-4-in-breast-cancer-tissues-and-its-effects-on-the-proliferation-of-breast-cancer-mda-mb-231-cells
#16
Xiang Song, Yue-Ming Xing, Wei Wu, Guo-Hua Cheng, Feng Xiao, Gang Jin, Ying Liu, Xin Zhao
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)...
May 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28564646/constitutive-activation-of-smoothened-in-the-renal-collecting-ducts-leads-to-renal-hypoplasia-hydronephrosis-and-hydroureter
#17
Deepak Prasad Gupta, Jae-Won Hwang, Eui-Sic Cho, Won Kim, Chang Ho Song, Ok Hee Chai
Sonic Hedgehog (Shh) signaling plays a major role in and is essential for regulation, patterning, and proliferation during renal development. Smoothened (Smo) plays a pivot role in transducing the Shh-glioma-associated oncogene Kruppel family member. However, the cellular and molecular mechanism underlying the role of sustained Smo activation in postnatal kidney development is still not clearly understood. Using a conditional knockin mouse model that expresses a constitutively activated form of Smo (SmoM2) upon Homeobox-B7-mediated recombination (Hoxb7-Cre), the effects of Shh signaling were determined in postnatal kidney development...
June 1, 2017: Cells, Tissues, Organs
https://www.readbyqxmd.com/read/28564582/microrna-145-protects-follicular-granulosa-cells-against-oxidative-stress-induced-apoptosis-by-targeting-kr%C3%A3-ppel-like-factor-4
#18
Lu Xu, Haixiang Sun, Mei Zhang, Yue Jiang, Chunxue Zhang, Jianjun Zhou, Lijun Ding, Yali Hu, Guijun Yan
Oxidative stress-induced follicular granulosa cell (GC) apoptosis plays an essential role in abnormal follicular atresia, which may trigger ovarian dysfunction. To investigate the role of microRNA (miR)-145 in the regulation of GC apoptosis and modulation of the apoptotic pathway in the setting of oxidative stress, we employed an H2O2-induced in vitro model and a 3-nitropropionic acid (NP)-induced in vivo model of ovarian oxidative stress. We demonstrated in vitro that miR-145 expression was significantly down-regulated in KGN cells and mouse granulosa cells (mGCs) treated with H2O2, whereas miR-145 over-expression attenuated H2O2-induced apoptosis in GCs...
May 28, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28553926/methylated-cis-regulatory-elements-mediate-klf4-dependent-gene-transactivation-and-cell-migration
#19
Jun Wan, Yijing Su, Qifeng Song, Brian Tung, Olutobi Oyinlade, Sheng Liu, Mingyao Ying, Guo-Li Ming, Hongjun Song, Jiang Qian, Heng Zhu, Shuli Xia
Altered DNA methylation status is associated with human diseases and cancer; however, the underlying molecular mechanisms remain elusive. We previously identified many human transcription factors, including Krüppel-like factor 4 (KLF4), as sequence-specific DNA methylation readers that preferentially recognize methylated CpG (mCpG), here we report the biological function of mCpG-dependent gene regulation by KLF4 in glioblastoma cells. We show that KLF4 promotes cell adhesion, migration, and morphological changes, all of which are abolished by R458A mutation...
May 29, 2017: ELife
https://www.readbyqxmd.com/read/28541545/kr%C3%A3-ppel-like-factors-compete-for-promoters-and-enhancers-to-fine-tune-transcription
#20
Melissa D Ilsley, Kevin R Gillinder, Graham W Magor, Stephen Huang, Timothy L Bailey, Merlin Crossley, Andrew C Perkins
Krüppel-like factors (KLFs) are a family of 17 transcription factors characterized by a conserved DNA-binding domain of three zinc fingers and a variable N-terminal domain responsible for recruiting cofactors. KLFs have diverse functions in stem cell biology, embryo patterning, and tissue homoeostasis. KLF1 and related family members function as transcriptional activators via recruitment of co-activators such as EP300, whereas KLF3 and related members act as transcriptional repressors via recruitment of C-terminal Binding Proteins...
May 24, 2017: Nucleic Acids Research
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