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https://www.readbyqxmd.com/read/29164576/potentiation-of-treatment-efficacy-against-colon-cancer-of-dopamine-via-elevating-klf2-expression-in-tumor-vascular-endothelial-cells
#1
S Chen, Y-M Zhang, Y-G Zhang, J Jia, R-W Zhu
OBJECTIVE: To investigate the anti-tumor effect and potential mechanism of dopamine combined with 5-FU in colon cancer. MATERIALS AND METHODS: Babl/c F1 generation male mice (N = 60) were inoculated with mouse C26 colon cancer cells below the pit to construct colon cancer model. Tumor-bearing mice were then divided into 4 groups (N = 8 each): model control group, dopamine group, 5-FU group and dopamine combined with 5-FU group. Dopamine (100 mg/kg/d) was intraperitoneally injected into mice...
November 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29161413/nrf2-regulates-endothelial-glycolysis-and-proliferation-with-mir-93-and-mediates-the-effects-of-oxidized-phospholipids-on-endothelial-activation
#2
Suvi M Kuosmanen, Emilia Kansanen, Minna U Kaikkonen, Virve Sihvola, Kati Pulkkinen, Henna-Kaisa Jyrkkänen, Pauli Tuoresmäki, Juha Hartikainen, Mikko Hippeläinen, Hannu Kokki, Pasi Tavi, Sami Heikkinen, Anna-Liisa Levonen
Phospholipids, such as 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine (PAPC), are the major components of cell membranes. Their exposure to reactive oxygen species creates oxidized phospholipids, which predispose to the development of chronic inflammatory diseases and metabolic disorders through endothelial activation and dysfunction. Although the effects of oxidized PAPC (oxPAPC) on endothelial cells have been previously studied, the underlying molecular mechanisms evoking biological responses remain largely unknown...
November 17, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29150239/tissue-resident-macrophages-are-locally-programmed-for-silent-clearance-of-apoptotic-cells
#3
Allison W Roberts, Bettina L Lee, Jacques Deguine, Shinu John, Mark J Shlomchik, Gregory M Barton
Although apoptotic cells (ACs) contain nucleic acids that can be recognized by Toll-like receptors (TLRs), engulfment of ACs does not initiate inflammation in healthy organisms. Here we identified macrophage populations that continually engulf ACs in distinct tissues and found that these macrophages share characteristics compatible with immunologically silent clearance of ACs; such characteristics include high expression of AC recognition receptors, low expression of TLR9, and reduced TLR responsiveness to nucleic acids...
November 21, 2017: Immunity
https://www.readbyqxmd.com/read/29139562/lncrna-ghet1-predicts-poor-prognosis-in-hepatocellular-carcinoma-and-promotes-cell-proliferation-by-silencing-klf2
#4
Li Jin, Yangke He, Shijia Tang, Shan Huang
BACKGROUND: Hepatocellular carcinoma (HCC) has been identified as one of the leading causes of cancer-related death worldwide. Recently, long non-coding RNAs (lncRNAs) attract much attention of researchers, and they are demonstrated to be dysregulated in a variety of cancers, including HCC. LncRNA gastric carcinoma high expressed transcript 1 lncRNA GHET1 is found to be dysregulated in gastric cancer (GC). However, its clinical value and potential biological function in HCC remains unclear...
November 15, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29137412/long-non-coding-rna-snhg15-inhibits-p15-and-klf2-expression-to-promote-pancreatic-cancer-proliferation-through-ezh2-mediated-h3k27me3
#5
Zhonghua Ma, Hesuyuan Huang, Jirong Wang, Yan Zhou, Fuxing Pu, Qinghong Zhao, Peng Peng, Bingqing Hui, Hao Ji, Keming Wang
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...
October 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/29125549/klf2-in-regulation-of-nf-%C3%AE%C2%BAb-mediated-immune-cell-function-and-inflammation
#6
REVIEW
Prerana Jha, Hiranmoy Das
KLF2 (Kruppel-like factor 2) is a member of the zinc finger transcription factor family, which critically regulates embryonic lung development, function of endothelial cells and maintenance of quiescence in T-cells and monocytes. It is expressed in naïve T-cells and monocytes, however its level of expression decreases during activation and differentiation. KLF2 also plays critical regulatory role in various inflammatory diseases and their pathogenesis. Nuclear factor-kappaB (NF-κB) is an important inducer of inflammation and the inflammation is mediated through the transcription of several proinflammatory cytokines, chemokines and adhesion molecules...
November 10, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29096169/lunasin-abrogates-monocytes-to-endothelial-cells
#7
Yongjun Zhu, Hui Li, Xuezhen Wang
The adherence of monocytes to endothelial cells plays a causal role in the early development of atherosclerosis and is driven by several inflammatory stimuli, which includes oxidized low-density lipoprotein (ox-LDL). Lunasin, a natural peptide identified in soybean seeds, soy-derived food products, other grains and herbal plants, has been found to exert numerous biological activities, including anti-inflammatory and antioxidant properties. However, little is known regarding the mechanism of action of lunasin in ox-LDL-induced endothelial inflammation...
October 30, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/29079188/klf2-attenuates-bleomycin-induced-pulmonary-fibrosis-and-inflammation-with-regulation-of-ap-1
#8
Jian Shi, Li-Rong Zhou, Xiao-Sheng Wang, Jun-Feng Du, Ming-Ming Jiang, Zhan Song, Guang-Chao Han, Zhi-Tao Mai
Pulmonary fibrosis (PF) is a chronic, fibrosing interstitial pneumonia and devastating disease. Here we investigated the potential roles of Kruppel-like factor 2 (KLF2) on pulmonary fibrosis and inflammation response. A mouse model of pulmonary fibrosis was established by intratracheal injection of bleomycin (BLM). The mRNA and protein levels of KLF2 were assayed by RT-PCR and Western blotting respectively. The extent of lung fibrosis was determined using hematoxylin and eosin (HE) staining and Masson's trichrome staining, and the hydroxyproline content was quantified...
October 24, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29056552/hemodynamic-forces-sculpt-developing-heart-valves-through-a-klf2-wnt9b-paracrine-signaling-axis
#9
Lauren M Goddard, Anne-Laure Duchemin, Harini Ramalingan, Bingruo Wu, Mei Chen, Sharika Bamezai, Jisheng Yang, Li Li, Michael P Morley, Tao Wang, Marielle Scherrer-Crosbie, David B Frank, Kurt A Engleka, Stephen C Jameson, Edward E Morrisey, Thomas J Carroll, Bin Zhou, Julien Vermot, Mark L Kahn
Hemodynamic forces play an essential epigenetic role in heart valve development, but how they do so is not known. Here, we show that the shear-responsive transcription factor KLF2 is required in endocardial cells to regulate the mesenchymal cell responses that remodel cardiac cushions to mature valves. Endocardial Klf2 deficiency results in defective valve formation associated with loss of Wnt9b expression and reduced canonical WNT signaling in neighboring mesenchymal cells, a phenotype reproduced by endocardial-specific loss of Wnt9b...
November 6, 2017: Developmental Cell
https://www.readbyqxmd.com/read/29042072/mir-200b-downregulates-kruppel-like-factor-2-klf2-during-acute-hypoxia-in-human-endothelial-cells
#10
Rafal Bartoszewski, Marcin Serocki, Anna Janaszak-Jasiecka, Sylwia Bartoszewska, Kinga Kochan-Jamrozy, Arkadiusz Piotrowski, Jarosław Króliczewski, James F Collawn
The role of microRNAs in controlling angiogenesis is recognized as a promising therapeutic target in both cancer and cardiovascular disorders. However, understanding a miRNA's pleiotropic effects on angiogenesis is a limiting factor for these types of therapeutic approaches. Using genome-wide next-generation sequencing, we examined the role of an antiangiogenic miRNA, miR-200b, in primary human endothelial cells. The results indicate that miR-200b has complex effects on hypoxia-induced angiogenesis in human endothelia and importantly, that many of the reported miR-200b effects using miRNA overexpression may not be representative of the physiological role of this miRNA...
December 2017: European Journal of Cell Biology
https://www.readbyqxmd.com/read/29023738/klf2-mediates-enhanced-chemoreflex-sensitivity-disordered-breathing-and-autonomic-dysregulation-in-heart-failure
#11
Noah J Marcus, Rodrigo Del Rio, Yanfeng Ding, Harold D Schultz
KEY POINTS: Enhanced carotid body chemoreflex activity contributes to development of disordered breathing patterns, autonomic dysregulation and increases in incidence of arrhythmia in animal models of reduced ejection fraction heart failure. Chronic reductions in carotid artery blood flow are associated with increased carotid body chemoreceptor activity. Krüppel-like Factor 2 (KLF2) is a shear stress-sensitive transcription factor that regulates the expression of enzymes which have previously been shown to play a role in increased chemoreflex sensitivity...
September 6, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28978525/ampk-klf2-signaling-pathway-mediates-the-proangiogenic-effect-of-erythropoietin-in-endothelial-colony-forming-cells
#12
Dawei Wang, Yimeng Song, Jianshu Zhang, Wei Pang, Xian Wang, Yi Zhu, Xiaoxia Li
Endothelial colony forming cells (ECFCs) were proved to take part in post-natal vasculogenesis and injury repair. The angiogenic properties of ECFCs could be influenced by various cytokines, chemokines, and growth factors. Erythropoietin (EPO) is a promising cytokine participating in angiogenesis. However, the mechanisms for EPO's proangiogenic effect still remain largely elusive. Here, we investigated the role of AMP-activated protein kinase (AMPK)-Krüppel-like factor 2 (KLF2) signaling pathway in the proangiogenic effect of EPO in ECFCs...
October 4, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/28970240/thrombospondin1-tsp1-replacement-prevents-cerebral-cavernous-malformations
#13
Miguel Alejandro Lopez-Ramirez, Gregory Fonseca, Hussein A Zeineddine, Romuald Girard, Thomas Moore, Angela Pham, Ying Cao, Robert Shenkar, Bart-Jan de Kreuk, Frederic Lagarrigue, Jack Lawler, Christopher K Glass, Issam A Awad, Mark H Ginsberg
KRIT1 mutations are the most common cause of cerebral cavernous malformation (CCM). Acute Krit1 gene inactivation in mouse brain microvascular endothelial cells (BMECs) changes expression of multiple genes involved in vascular development. These changes include suppression of Thbs1, which encodes thrombospondin1 (TSP1) and has been ascribed to KLF2- and KLF4-mediated repression of Thbs1 In vitro reconstitution of TSP1 with either full-length TSP1 or 3TSR, an anti-angiogenic TSP1 fragment, suppresses heightened vascular endothelial growth factor signaling and preserves BMEC tight junctions...
November 6, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28950881/erratum-to-long-non-coding-rna-anril-is-upregulated-in-hepatocellular-carcinoma-and-regulates-cell-proliferation-by-epigenetic-silencing-of-klf2
#14
Ming-de Huang, Wen-Ming Chen, Fu-Zhen Qi, Rui Xia, Ming Sun, Tong-Peng Xu, Li Yin, Er-Bao Zhang, Wei De, Yong-Qian Shu
No abstract text is available yet for this article.
July 27, 2017: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/28941629/diagnostic-accuracy-of-a-selected-signature-gene-set-that-discriminates-active-pulmonary-tuberculosis-and-other-pulmonary-diseases
#15
Ngiambudulu M Francisco, Yi-Min Fang, Li Ding, Siyuan Feng, Yiying Yang, Minhao Wu, Muazzam Jacobs, Bernhard Ryffel, Xi Huang
OBJECTIVE: We validated the accuracy of host selected signature gene set using unstimulated whole blood (WB), and peripheral blood mononuclear cells (PBMC) in the diagnosis of tuberculosis (TB). METHODS: The unstimulated WB and PBMC from 1417 individuals with active pulmonary TB patients, other lung diseases and healthy participants were analyzed using real time polymerase chain reaction (RT-PCR). RESULTS: The WB cohort test demonstrates that the combination of GBP5 and KLF2 can differentiate active TB versus HC with sensitivity and specificity of 77...
September 20, 2017: Journal of Infection
https://www.readbyqxmd.com/read/28938648/a-novel-lncrna-ll22nc03-n64e9-1-represses-klf2-transcription-through-binding-with-ezh2-in-colorectal-cancer
#16
Yifan Lian, Changsheng Yan, Jie Ding, Rui Xia, Zhonghua Ma, Bingqing Hui, Hao Ji, Jing Zhou, Keming Wang
Long noncoding RNAs (lncRNA) have been implicated in variety human cancer but their mechanisms of function are mainly undocumented. In the present study, we investigated lncRNAs alteration that contributed to colorectal cancer (CRC) by utilizing TCGA RNA sequencing data and other publicly available lncRNAs expression profiling data. Here, We screened out the CRC-associated lncRNA LL22NC03-N64E9.1, a key regulator of CRC development and progression. We also revealed that knockdown of LL22NC03-N64E9.1 inhibited cell proliferation, colony formation, tumorigenicity and apoptosis promotion, both in vitro and in vivo...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28892161/a-gene-is-known-by-the-company-it-keeps-enrichment-of-tnfaip3-gene-aberrations-in-malt-lymphomas-expressing-ighv4-34-antigen-receptors
#17
Andreas Agathangelidis, Aliki Xochelli, Kostas Stamatopoulos
Associations between immunoglobulin (IG) receptors with distinctive immunogenetic features and particular gene mutations are a recurring theme in mature B-cell lymphomas. Relevant observations have been made in chronic lymphocytic leukemia (CLL), where gene mutations are distributed asymmetrically in cases bearing or not somatic hypermutations within the clonotypic immunoglobulin heavy chain variable region (IGHV) genes (e.g. TP53 mutations predominate in IG-unmutated CLL, whereas the opposite is seen for MYD88 mutations, enriched in IG-mutated CLL) and in subsets of cases with stereotyped IG (enrichment for SF3B1 mutations in CLL subset #2)...
September 11, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28889080/reprogramming-of-rabbit-induced-pluripotent-stem-cells-toward-epiblast-and-chimeric-competency-using-kr%C3%A3-ppel-like-factors
#18
Yann Tapponnier, Marielle Afanassieff, Irène Aksoy, Maxime Aubry, Anaïs Moulin, Lucas Medjani, Wilhelm Bouchereau, Chloé Mayère, Pierre Osteil, Jazmine Nurse-Francis, Ioannis Oikonomakos, Thierry Joly, Luc Jouneau, Catherine Archilla, Barbara Schmaltz-Panneau, Nathalie Peynot, Harmonie Barasc, Alain Pinton, Jérome Lecardonnel, Elen Gocza, Nathalie Beaujean, Véronique Duranthon, Pierre Savatier
Rabbit induced pluripotent stem cells (rbiPSCs) possess the characteristic features of primed pluripotency as defined in rodents and primates. In the present study, we reprogrammed rbiPSCs using human Krüppel-like factors (KLFs) 2 and 4 and cultured them in a medium supplemented with fetal calf serum and leukemia inhibitory factor. These cells (designated rbEKA) were propagated by enzymatic dissociation for at least 30 passages, during which they maintained a normal karyotype. This new culturing protocol resulted in transcriptional and epigenetic reconfiguration, as substantiated by the expression of transcription factors and the presence of histone modifications associated with naïve pluripotency...
September 5, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28873368/kr%C3%A3-ppel-like-factor-2-regulates-degradation-of-type-ii-collagen-by-suppressing-the-expression-of-matrix-metalloproteinase-mmp-13
#19
Yuan Yuan, Honglue Tan, Pengyi Dai
BACKGROUND/AIMS: Krüppel-like factor 2 (KLF2) plays an essential role in the inhibition of endothelial cell and macrophage activation during the inflammatory process. However, the roles of KLF2 in chondrocytes and the pathological progression of osteoarthritis (OA) remain unknown. The aim of this study was to investigate the function of KLF2 in the inhibition of cartilage matrix destruction in chondrocytes. METHODS: RT-PCR and western blot analysis was used to determine the expression of KLF2 in human chondrocytes...
2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28871944/-effect-of-kruppel-like-factor-2-klf2-over-expression-on-activities-of-chicken-ppar%C3%AE-and-c-ebp%C3%AE-promoters
#20
Yuechan Chen, Chunyan Wu, Zhiwei Zhang
Objective To examine the effect of Kruppel-like factor 2 (KLF2) over-expression on the activities of chicken peroxisome proliferator-activated receptor gamma (PPARγ) and CCAAT/enhancer binding protein alpha (C/EBPα) promoters. Methods Luciferase reporter assay was used to investigate the effect of KLF2 over-expression on reporter activities of 6 kinds of chicken PPARγ promoter construct and 5 kinds of chicken C/EBPα promoter construct in DF1 cells. Results KLF2 over-expression significantly inhibited the reporter activities of 4 kinds of chicken PPARγ promoter construct (-1978/-82, -1513/-82, -1254/-82 and -1019/-82), but had no significant effect on the reporter activities of 2 kinds of PPARγ promoter construct (-513/-82 and -320/-82)...
August 2017: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
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