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https://www.readbyqxmd.com/read/28315789/involvement-of-epithelial-mesenchymal-transition-afforded-by-activation-of-lox-1-tgf-%C3%AE-1-klf6-signaling-pathway-in-diabetic-pulmonary-fibrosis
#1
Xiao-Zhou Zou, Zhi-Cheng Gong, Ting Liu, Fang He, Tian-Tian Zhu, Dai Li, Wei-Fang Zhang, Jun-Lin Jiang, Chang-Ping Hu
BACKGROUND AND OBJECTIVE: Diabetic pulmonary fibrosis is a severe disease that increases mortality risk of diabetes. However, the molecular mechanisms leading to pulmonary fibrosis in diabetes are poorly understood. This study investigated the roles of epithelial-mesenchymal transition (EMT) and the associated molecular mechanisms in streptozotocin (STZ)-induced rat pulmonary fibrosis. METHODS: The rat model of diabetic pulmonary fibrosis was established by intraperitoneal injection of a single dose of STZ (35 mg/kg)...
March 15, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28306664/kr%C3%A3-ppel-like-factors-in-endothelial-cell-biology
#2
Eugene Chang, Lalitha Nayak, Mukesh K Jain
PURPOSE OF REVIEW: Krüppel-like factors (KLFs) are a family of transcription factors that regulate integral functions of endothelial cells including inflammation, proliferation, growth, apoptosis, cell differentiation and plasticity, and migration. This review will focus on the role of KLFs in physiological activity and their loss in vascular pathology. RECENT FINDINGS: New studies have pointed at the role of microRNAs as repressors of KLFs in atherosclerotic areas providing another level of signaling regulation of KLFs...
March 16, 2017: Current Opinion in Hematology
https://www.readbyqxmd.com/read/28292252/prediction-and-identification-of-kr%C3%A3-ppel-like-transcription-factors-by-machine-learning-method
#3
Zhijun Liao, Xinrui Wang, Xingyong Chend, Quan Zoub
The Krüppel-like factors (KLFs)are a family of containing zinc finger(ZF) motif transcription factors with 18 members in human genome.KLFs possess various physiological functionrelating withnumerous cancers and other diseases. Here we perform a binary-class classification of KLFs and non-KLFs and conserved motifs analysis of human KLFs. We search and cluster the protein sequences andseparate them into training datasetand test dataset(containing only negative samples), after extracting the 188-dimensional(188D) feature vectors we carry out category with four classifiers(GBDT, libSVM, RF, and k-NN), and use 10-fold cross-validation...
March 13, 2017: Combinatorial Chemistry & High Throughput Screening
https://www.readbyqxmd.com/read/28289824/a-mirna-signature-for-an-environmental-heterocyclic-amine-defined-by-a-multi-organ-carcinogenicity-bioassay-in-the-rat
#4
Ying-Shiuan Chen, Rong Wang, Wan-Mohaiza Dashwood, Christiane V Löhr, David E Williams, Emily Ho, Susanne Mertens-Talcott, Roderick H Dashwood
Heterocyclic amines (HCAs) produced during high-temperature cooking have been studied extensively in terms of their genotoxic/genetic effects, but recent work has implicated epigenetic mechanisms involving non-coding RNAs. Colon tumors induced in the rat by 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) have altered microRNA (miRNA) signatures linked to dysregulated pluripotency factors, such as c-Myc and Krüppel-like factor 4 (KLF4). We tested the hypothesis that dysregulated miRNAs from PhIP-induced colon tumors would provide a "PhIP signature" for use in other target organs obtained from a 1-year carcinogenicity bioassay in the rat...
March 13, 2017: Archives of Toxicology
https://www.readbyqxmd.com/read/28289232/transcriptional-landscape-of-the-human-cell-cycle
#5
Yin Liu, Sujun Chen, Su Wang, Fraser Soares, Martin Fischer, Feilong Meng, Zhou Du, Charles Lin, Clifford Meyer, James A DeCaprio, Myles Brown, X Shirley Liu, Housheng Hansen He
Steady-state gene expression across the cell cycle has been studied extensively. However, transcriptional gene regulation and the dynamics of histone modification at different cell-cycle stages are largely unknown. By applying a combination of global nuclear run-on sequencing (GRO-seq), RNA sequencing (RNA-seq), and histone-modification Chip sequencing (ChIP-seq), we depicted a comprehensive transcriptional landscape at the G0/G1, G1/S, and M phases of breast cancer MCF-7 cells. Importantly, GRO-seq and RNA-seq analysis identified different cell-cycle-regulated genes, suggesting a lag between transcription and steady-state expression during the cell cycle...
March 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28278702/kr%C3%A3-ppel-like-factor-4-contributes-to-the-pathogenesis-of-mantle-cell-lymphoma
#6
Xin-Yu Li, Ling-Yun Geng, Xiang-Xiang Zhou, Na Wei, Xiao-Sheng Fang, Ying Li, Xin Wang
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...
February 28, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28273063/krab-zinc-finger-proteins-contribute-to-the-evolution-of-gene-regulatory-networks
#7
Michaël Imbeault, Pierre-Yves Helleboid, Didier Trono
The human genome encodes some 350 Krüppel-associated box (KRAB) domain-containing zinc-finger proteins (KZFPs), the products of a rapidly evolving gene family that has been traced back to early tetrapods. The function of most KZFPs is unknown, but a few have been demonstrated to repress transposable elements in embryonic stem (ES) cells by recruiting the transcriptional regulator TRIM28 and associated mediators of histone H3 Lys9 trimethylation (H3K9me3)-dependent heterochromatin formation and DNA methylation...
March 8, 2017: Nature
https://www.readbyqxmd.com/read/28263788/discovery-of-a-novel-oocyte-specific-kr%C3%A3-ppel-associated-box-domain-containing-zinc-finger-protein-required-for-early-embryogenesis-in-cattle
#8
Jacqelyn M Hand, Kun Zhang, Lei Wang, Prasanthi P Koganti, Kristen Mastrantoni, Sandeep K Rajput, Mohamed Ashry, George W Smith, Jianbo Yao
Zinc finger (ZNF) transcription factors interact with DNA through zinc finger motifs and play important roles in a variety of cellular functions including cell growth, proliferation, development, apoptosis, and intracellular signal transduction. One-third of ZNF proteins in metazoans contain a highly conserved N-terminal motif known as the Krüppel-associated box (KRAB) domain, which acts as a potent, DNA-binding dependent transcriptional repression module. Analysis of RNA-Seq data generated from a bovine oocyte cDNA library identified a novel transcript, which encodes a KRAB-containing ZNF transcription factor (named ZNFO)...
March 2, 2017: Mechanisms of Development
https://www.readbyqxmd.com/read/28263185/laminar-flow-downregulates-notch-activity-to-promote-lymphatic-sprouting
#9
Dongwon Choi, Eunkyung Park, Eunson Jung, Young Jin Seong, Jaehyuk Yoo, Esak Lee, Mingu Hong, Sunju Lee, Hiroaki Ishida, James Burford, Janos Peti-Peterdi, Ralf H Adams, Sonal Srikanth, Yousang Gwack, Christopher S Chen, Hans J Vogel, Chester J Koh, Alex K Wong, Young-Kwon Hong
The major function of the lymphatic system is to drain interstitial fluid from tissue. Functional drainage causes increased fluid flow that triggers lymphatic expansion, which is conceptually similar to hypoxia-triggered angiogenesis. Here, we have identified a mechanotransduction pathway that translates laminar flow-induced shear stress to activation of lymphatic sprouting. While low-rate laminar flow commonly induces the classic shear stress responses in blood endothelial cells and lymphatic endothelial cells (LECs), only LECs display reduced Notch activity and increased sprouting capacity...
March 6, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28261316/defective-lipid-metabolism-associated-with-mutation-in-klf-2-and-klf-3-important-roles-of-essential-dietary-salts-in-fat-storage
#10
Jun Ling, Christopher Brey, Megan Schilling, Farah Lateef, Zenaida P Lopez-Dee, Kristopher Fernandes, Kavita Thiruchelvam, Yi Wang, Kshitij Chandel, Kai Rau, Ranjit Parhar, Futwan Al-Mohanna, Randy Gaugler, Sarwar Hashmi
BACKGROUND: Dietary salts are important factors in metabolic disorders. They are vital components of enzymes, vitamins, hormones, and signal transduction that act synergistically to regulate lipid metabolism. Our previous studies have identified that Krüppel-like factor -3 (KLF-3) is an essential regulator of lipid metabolism. However, it is not known if KLF-2 also regulates lipid metabolism and whether KLF-2 and -3 mediate the effects of dietary salts on lipid metabolism. METHODS: In this study, we used klf mutants [homozygous klf-2 (ok1043) V and klf-3 (ok1975) II mutants] to investigate the role of dietary salts in lipid metabolism...
2017: Nutrition & Metabolism
https://www.readbyqxmd.com/read/28261203/regulation-of-murine-natural-killer-cell-development
#11
REVIEW
Wilford Goh, Nicholas D Huntington
Natural killer (NK) cells are effector lymphocytes of the innate immune system that are known for their ability to kill transformed and virus-infected cells. NK cells originate from hematopoietic stem cells in the bone marrow, and studies on mouse models have revealed that NK cell development is a complex, yet tightly regulated process, which is dependent on both intrinsic and extrinsic factors. The development of NK cells can be broadly categorized into two phases: lineage commitment and maturation. Efforts to better define the developmental framework of NK cells have led to the identification of several murine NK progenitor populations and mature NK cell subsets, each defined by a varied set of cell surface markers...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28260047/induced-pluripotent-stem-cells-from-patients-with-focal-cortical-dysplasia-and-refractory-epilepsy
#12
Daniel Rodrigo Marinowic, Fernanda Majolo, Alessandra Deise Sebben, Vinicius Duval da Silva, Tiago Giuliani Lopes, Eliseu Paglioli, André Palmini, Denise Cantarelli Machado, Jaderson Costa da Costa
Focal cortical dysplasia (FCD) is caused by numerous alterations, which can be divided into abnormalities of the cortical architecture and cytological variations; however, the exact etiology of FCD remains unknown. The generation of induced pluripotent stem cells (iPSCs) from the cells of patients with neurological diseases, and their subsequent tissue‑specific differentiation, serves as an invaluable source for testing and studying the initial development and subsequent progression of diseases associated with the central nervous system...
March 1, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28250026/foxo3-increases-mir-34a-to-cause-palmitate-induced-cholangiocyte-lipoapoptosis
#13
Sathish Kumar Natarajan, Bailey A Stringham, Ashley M Mohr, Cody J Wehrkamp, Sizhao Lu, Mary Anne Phillippi, Dee Harrison-Findik, Justin L Mott
Non-alcoholic steatohepatitis (NASH) patients have elevated plasma saturated free fatty acid levels. These toxic fatty acids can induce liver cell death and our recent results demonstrated that the biliary epithelium may be susceptible to lipotoxicity. Here, we explored the molecular mechanisms of cholangiocyte lipoapoptosis in cell culture and in an animal model of NASH. Treatment of cholangiocytes with palmitate showed increased caspase-3/7 activity, and increased levels of cleaved PARP and cleaved caspase 3 demonstrating cholangiocyte lipoapoptosis...
March 1, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28249899/kr%C3%A3-ppel-like-transcription-factor-klf10-suppresses-tgf%C3%AE-induced-epithelial-to-mesenchymal-transition-via-a-negative-feedback-mechanism
#14
Vivek Kumar Mishra, Malayannan Subramaniam, Vijayalakshmi Kari, Kevin S Pitel, Simon J Baumgart, Ryan M Naylor, Sankari Nagarajan, Florian Wegwitz, Volker Ellenrieder, John R Hawse, Steven A Johnsen
TGFβ-SMAD signaling exerts a contextual effect that suppresses malignant growth early in epithelial tumorigenesis but promotes metastasis at later stages. Longstanding challenges in resolving this functional dichotomy may uncover new strategies to treat advanced carcinomas. The Krüppel-like transcription factor KLF10 is a pivotal effector of TGFβ/SMAD signaling that mediates anti-proliferative effects of TGFβ. In this study, we show how KLF10 opposes the pro-metastatic effects of TGFβ by limiting its ability to induce epithelial-to-mesenchymal transition (EMT)...
March 1, 2017: Cancer Research
https://www.readbyqxmd.com/read/28249048/chloroquine-triggers-epstein-barr-virus-replication-through-phosphorylation-of-kap1-trim28-in-burkitt-lymphoma-cells
#15
Xiaofan Li, Eric M Burton, Sumita Bhaduri-McIntosh
Trials to reintroduce chloroquine into regions of Africa where P. falciparum has regained susceptibility to chloroquine are underway. However, there are long-standing concerns about whether chloroquine increases lytic-replication of Epstein-Barr virus (EBV), thereby contributing to the development of endemic Burkitt lymphoma. We report that chloroquine indeed drives EBV replication by linking the DNA repair machinery to chromatin remodeling-mediated transcriptional repression. Specifically, chloroquine utilizes ataxia telangiectasia mutated (ATM) to phosphorylate the universal transcriptional corepressor Krüppel-associated Box-associated protein 1/tripartite motif-containing protein 28 (KAP1/TRIM28) at serine 824 -a mechanism that typically facilitates repair of double-strand breaks in heterochromatin, to instead activate EBV...
March 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28247282/backbone-1-h-13-c-and-15-n-nmr-resonance-assignments-of-the-kr%C3%A3-ppel-like-factor-4-activation-domain
#16
Brigid S Conroy, Emma R Weiss, Steven P Smith, David N Langelaan
Krüppel-like factor 4 (KLF4) is a transcription factor involved in diverse biological processes, including development, cellular differentiation and proliferation, and maintenance of tissue homeostasis. KLF4 has also been associated with disease states, such as cardiovascular disease and several cancers. KLF4 contains an activation domain, repression domain, and a structurally characterized C-terminal zinc finger domain that mediates its binding to DNA. The structurally uncharacterized KLF4 activation domain is critical for transactivation by KLF4 and mediates its binding to the transcriptional coactivator CBP/p300...
February 28, 2017: Biomolecular NMR Assignments
https://www.readbyqxmd.com/read/28246209/kr%C3%A3-ppel-like-factors-in-mammalian-stem-cells-and-development
#17
REVIEW
Agnieszka B Bialkowska, Vincent W Yang, Sandeep K Mallipattu
Krüppel-like factors (KLFs) are a family of zinc-finger transcription factors that are found in many species. Recent studies have shown that KLFs play a fundamental role in regulating diverse biological processes such as cell proliferation, differentiation, development and regeneration. Of note, several KLFs are also crucial for maintaining pluripotency and, hence, have been linked to reprogramming and regenerative medicine approaches. Here, we review the crucial functions of KLFs in mammalian embryogenesis, stem cell biology and regeneration, as revealed by studies of animal models...
March 1, 2017: Development
https://www.readbyqxmd.com/read/28239300/mir-7-inhibits-progression-of-hepatocarcinoma-by-targeting-klf-4-and-promises-a-novel-diagnostic-biomarker
#18
Weizhong Wu, Sanguang Liu, Yunfei Liang, Zegao Zhou, Xueqing Liu
BACKGROUND: MicroRNAs are 22-24 nt non-coding RNAs that bind to the 3' UTR of target mRNAs, thereby inducing mRNA degradation or inhibiting mRNA translation. Due to their implication in the regulation of post-transcriptional processes, the role of miRNAs in hepatocellular carcinoma (HCC) has been extensively studied. However, the function of miR-7 in HCC remains to be demonstrated. METHODS: 50 paired HCC tissues and matched peritumor tissues from patients were collected...
2017: Cancer Cell International
https://www.readbyqxmd.com/read/28237823/kr%C3%A3-ppel-like-factor-4-klf4-what-we-currently-know
#19
REVIEW
Amr M Ghaleb, Vincent W Yang
Krüppel-like factor 4 (KLF4) is an evolutionarily conserved zinc finger-containing transcription factor that regulates diverse cellular processes such as cell growth, proliferation, and differentiation. Since its discovery in 1996, KLF4 has been gaining a lot of attention, after it was shown in 2006 as one of four factors required for the induction of pluripotent stem cells (iPSCs). Here we review the current knowledge on the different functions and roles of KLF4 in various tissue and organ systems.
February 22, 2017: Gene
https://www.readbyqxmd.com/read/28218782/tumor-suppressive-role-of-kruppel-like-factor-4-klf-4-in-colorectal-cancer
#20
D H Xiu, Y Chen, L Liu, H S Yang, G F Liu
Kruppel-like factors (KLFs) are a group of transcriptional regulators that have recently been identified to exhibit tumor-suppressive function against various gastrointestinal cancers. The present study aims to investigate the expression patterns and prognostic value of KLF-4 in colorectal cancers (CRCs). KLF-4 levels in CRC tissues were examined via immunohistochemistry analysis, real-time quantitative polymerase chain reaction, and western blotting. The chi-square test was performed to evaluate the correlation between KLF-4 expression and the clinicopathological characteristics...
February 16, 2017: Genetics and Molecular Research: GMR
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