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Hif1a

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https://www.readbyqxmd.com/read/28437727/new-inter-correlated-genes-targeted-by-diatom-derived-polyunsaturated-aldehydes-in-the-sea-urchin-paracentrotus-lividus
#1
Nadia Ruocco, Anna Maria Fedele, Susan Costantini, Giovanna Romano, Adrianna Ianora, Maria Costantini
The marine environment is continually subjected to the action of stressors (including natural toxins), which represent a constant danger for benthic communities. In the present work using network analysis we identified ten genes on the basis of associated functions (FOXA, FoxG, GFI-1, nodal, JNK, OneCut/Hnf6, TAK1, tcf4, TCF7, VEGF) in the sea urchin Paracentrotus lividus, having key roles in different processes, such as embryonic development and asymmetry, cell fate specification, cell differentiation and morphogenesis, and skeletogenesis...
April 21, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28435028/antagonistic-effects-of-p53-and-hif1a-on-microrna-34a-regulation-of-ppp1r11-and-stat3-and-hypoxia-induced-epithelial-to-mesenchymal-transition-in-colorectal-cancer-cells
#2
Huihui Li, Matjaz Rokavec, Longchang Jiang, David Horst, Heiko Hermeking
BACKGROUND & AIMS: In colorectal tumors, hypoxia causes resistance to therapy and promotes metastasis. Loss of the tumor suppressor p53 (encoded by TP53) provides cancer cells with a selective advantage under conditions of hypoxia, but little is known about the mediators of this effect. METHODS: Isogenic CRC cell lines with different TP53 genotypes were placed under conditions of hypoxia. We examined the effects on levels and activity of microRNA-34 a (MIR34A) in CRC cells...
April 20, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28430666/myc-induced-glutaminolysis-bypasses-hif-driven-glycolysis-in-hypoxic-small-cell-lung-carcinoma-cells
#3
Matilda Munksgaard Thorén, Marica Vaapil, Johan Staaf, Maria Planck, Martin E Johansson, Sofie Mohlin, Sven Påhlman
We previously demonstrated that small cell lung carcinoma (SCLC) cells lack HIF-2α protein expression, whereas HIF-1α in these cells is expressed at both acute and prolonged hypoxia. Here we show that low HIF2A expression correlates with high expression of MYC genes. Knockdown of HIF1A expression had no or limited effect on cell survival and growth in vitro. Unexpectedly, hypoxic ATP levels were not affected by HIF-1α knockdown and SCLC cell viability did not decrease upon glucose deprivation. In line with these in vitro data, xenograft tumor-take and growth were not significantly affected by repressed HIF1A expression...
April 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28423608/anthracyclines-suppress-pheochromocytoma-cell-characteristics-including-metastasis-through-inhibition-of-the-hypoxia-signaling-pathway
#4
Ying Pang, Chunzhang Yang, Jan Schovanek, Herui Wang, Petra Bullova, Veronika Caisova, Garima Gupta, Katherine I Wolf, Gregg L Semenza, Zhengping Zhuang, Karel Pacak
Pheochromocytomas (PHEOs) and paragangliomas (PGLs) are rare, neuroendocrine tumors derived from adrenal or extra-adrenal chromaffin cells, respectively. Metastases are discovered in 3-36% of patients at the time of diagnosis. Currently, only suboptimal treatment options exist. Therefore, new therapeutic compounds targeting metastatic PHEOs/PGLs are urgently needed. Here, we investigated if anthracyclines were able to suppress the progression of metastatic PHEO. We explored their effects on experimental mouse PHEO tumor cells using in vitro and in vivo models, and demonstrated that anthracyclines, particularly idarubicin (IDA), suppressed hypoxia signaling by preventing the binding of hypoxia-inducible factor 1 and 2 (HIF-1 and HIF-2) to the hypoxia response element (HRE) sites on DNA...
April 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28417167/gene-expression-levels-of-gamma-glutamyl-hydrolase-in-tumor-tissues-may-be-a-useful-biomarker-for-the-proper-use-of-s-1-and-tegafur-uracil-leucovorin-in-preoperative-chemoradiotherapy-for-patients-with-rectal-cancer
#5
Sotaro Sadahiro, T Suzuki, A Tanaka, K Okada, G Saito, H Miyakita, T Ogimi, H Nagase
PURPOSE: Preoperative chemoradiotherapy (CRT) using 5-fluorouracil (5-FU)-based chemotherapy is the standard of care for rectal cancer. The effect of additional chemotherapy during the period between the completion of radiotherapy and surgery remains unclear. Predictive factors for CRT may differ between combination chemotherapy with S-1 and with tegafur-uracil/leucovorin (UFT/LV). METHODS: The subjects were 54 patients with locally advanced rectal cancer who received preoperative CRT with S-1 or UFT/LV...
April 17, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28416760/the-histone-demethylase-kdm3a-regulates-the-transcriptional-program-of-the-androgen-receptor-in-prostate-cancer-cells
#6
Stephen Wilson, Lingling Fan, Natasha Sahgal, Jianfei Qi, Fabian V Filipp
The lysine demethylase 3A (KDM3A, JMJD1A or JHDM2A) controls transcriptional networks in a variety of biological processes such as spermatogenesis, metabolism, stem cell activity, and tumor progression. We matched transcriptomic and ChIP-Seq profiles to decipher a genome-wide regulatory network of epigenetic control by KDM3A in prostate cancer cells. ChIP-Seq experiments monitoring histone 3 lysine 9 (H3K9) methylation marks show global histone demethylation effects of KDM3A. Combined assessment of histone demethylation events and gene expression changes presented major transcriptional activation suggesting that distinct oncogenic regulators may synergize with the epigenetic patterns by KDM3A...
March 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/28415653/association-between-hif1a-rs11549465-polymorphism-and-risk-of-prostate-cancer-a-meta-analysis
#7
REVIEW
Xiao-Dong Li, Hao Zi, Cheng Fang, Xian-Tao Zeng
The hypoxia inducible factor 1-alpha (HIF1A) gene has been suggested to play a critical role in cancer progression, and the relationship between HIF1A rs11549465 polymorphism and risk of prostate cancer has been investigated in previous studies. Nevertheless, conflicting results have been obtained. Hence, we reevaluated this issue by means of this meta-analysis, with the purpose of providing more precise conclusion on this issue. The electronic databases of PubMed, EMBASE and Chinese National Knowledge Infrastructure (CNKI) as well as other sources were searched for relevant reports concerning on the role of HIF1A rs11549465 polymorphism in the occurrence of prostate cancer...
March 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28387640/fructose-1-6-bisphosphatase-1-reduces-18-f-fdg-uptake-in-hepatocellular-carcinoma
#8
Ruohua Chen, Jiajin Li, Xiang Zhou, Jianjun Liu, Gang Huang
Purpose To determine whether fructose 1,6-bisphosphatase 1 (FBP1) expression is associated with fluorine 18 ((18)F) fluorodeoxyglucose (FDG) accumulation in patients with hepatocellular carcinoma (HCC) and to investigate how FBP1 expression and (18)F FDG uptake are related to tumor differentiation grade and metabolism and whether the molecular mechanism involves hypoxia-inducible factor 1-α (HIF1A) transcriptional activity. Materials and Methods This retrospective study was approved by the institutional review board with informed consent...
April 6, 2017: Radiology
https://www.readbyqxmd.com/read/28386377/hypoxia-inducible-factor-1%C3%AE-promotes-survival-of-mesenchymal-stem-cells-under-hypoxia
#9
Bingke Lv, Feng Li, Jie Fang, Limin Xu, Chengmei Sun, Jianbang Han, Tian Hua, Zhongfei Zhang, Zhiming Feng, Xiaodan Jiang
Mesenchymal stem cells (MSCs) are ideal materials for cell therapy. Research has indicated that hypoxia benefits MSC survival, but little is known about the underlying mechanism. This study aims to uncover potential mechanisms involving hypoxia inducible factor 1α (HIF1A) to explain the promoted MSC survival under hypoxia. MSCs were obtained from Sprague-Dawley rats and cultured under normoxia or hypoxia condition. The overexpression vector or small interfering RNA of Hif1a gene was transfected to MSCs, after which cell viability, apoptosis and expression of HIF1A were analyzed by MTT assay, flow cytometry, qRT-PCR and Western blot...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28380526/inhibition-of-chemokine-c-x-c-motif-receptor-four-cxcr4-at-the-fetal-maternal-interface-during-early-gestation-in-sheep-alterations-in-expression-of-chemokines-angiogenic-factors-and-their-receptors
#10
K E Quinn, S Z Prosser, K K Kane, R L Ashley
<p>Chemokine (C-X-C motif) ligand 12 (CXCL12) and its receptor, chemokine (C-X-C motif) receptor 4 (CXCR4), are involved in significant biological processes associated with early pregnancy including increasing trophoblast invasion and stimulating placental vascularization. To further elucidate functions of CXCL12-CXCR4 signaling during early gestation, our objective was to inhibit CXCR4 in vivo using a CXCR4 antagonist, AMD3100. We hypothesized that inhibition of CXCR4 would negatively affect chemokine and angiogenic factor regulation imperative for placental development in sheep...
March 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28366537/hif-has-biff-crosstalk-between-hif1a-and-the-family-of-bhlh-pas-proteins
#11
Emily L Button, David C Bersten, Murray L Whitelaw
Two decades of research into functions of the ubiquitous transcription factor HIF have revealed pervasive roles in development, oxygen homeostasis, metabolism, cancer and responses to ischemia. Unsurprisingly, HIF activities impinge on many pathologies, for which underlying molecular mechanisms are actively sought. HIF is a member of the heterodimeric bHLH/PAS family of transcription factors, a set of proteins that commonly function in developmental pathways and adaptive responses to environmental or physiological stress...
March 31, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28344883/acquisition-of-tumor-cell-phenotypic-diversity-along-the-emt-spectrum-under-hypoxic-pressure-consequences-on-susceptibility-to-cell-mediated-cytotoxicity
#12
Stéphane Terry, Stéphanie Buart, Tuan Zea Tan, Gwendoline Gros, Muhammad Zaeem Noman, James B Lorens, Fathia Mami-Chouaib, Jean Paul Thiery, Salem Chouaib
Tumor escape to immunosurveillance and resistance to immune attacks present a major hurdle in cancer therapy, especially in the current era of new cancer immunotherapies. We report here that hypoxia, a hallmark of most solid tumors, orchestrates carcinoma cell heterogeneity through the induction of phenotypic diversity and the acquisition of distinct epithelial-mesenchymal transition (EMT) states. Using lung adenocarcinoma cells derived from a non-metastatic patient, we demonstrated that hypoxic stress induced phenotypic diversity along the EMT spectrum, with induction of EMT transcription factors (EMT-TFs) SNAI1, SNAI2, TWIST1, and ZEB2 in a hypoxia-inducible factor-1α (HIF1A)-dependent or -independent manner...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28322821/genetics-of-the-hypoxia-inducible-factors-in-human-cancers
#13
Keiji Tanimoto
Professor Lorenz Poellinger (Karolinska Institute/Cancer Science Institute of Singapore) passed away in March 2016. Then hypoxic research field lost a noble and unique researcher when he died, since he had contributed very much to this field in a variety of aspects. We had been collaborating on a various research projects of genomic analyses of HIF-signaling pathway for a long time, and recently reported several interesting results with HIF-α genes (HIF1A, EPAS1 and HIF3A). Genomics/Genetics is a still growing field, with new technologies appearing often, and many groups have performed extensive genomic/genetic analyses...
March 17, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28319320/the-endochondral-bone-protein-chm1-sustains-an-undifferentiated-invasive-phenotype-promoting-lung-metastasis-in-ewing-sarcoma
#14
Kristina von Heyking, Julia Calzada-Wack, Stefanie Göllner, Frauke Neff, Oxana Schmidt, Tim Hensel, David Schirmer, Annette Fasan, Irene Esposito, Carsten Müller-Tidow, Poul H Sorensen, Stefan Burdach, Günther H S Richter
Ewing sarcomas (ES) are highly malignant, osteolytic bone or soft tissue tumors, which are characterized by EWS-ETS translocations and early metastasis to lung and bone. In this study, we investigated the role of the BRICHOS chaperone domain-containing endochondral bone protein chondromodulin I (CHM1) in ES pathogenesis. CHM1 is significantly over-expressed in ES, and chromosome immunoprecipitation (ChIP) data demonstrate CHM1 to be directly bound by an EWS-ETS translocation, EWS-FLI1. Using RNA interference we observed that CHM1 promoted chondrogenic differentiation capacity of ES cells but decreased the expression of osteolytic genes such as HIF1A, IL6, JAG1 and VEGF...
March 20, 2017: Molecular Oncology
https://www.readbyqxmd.com/read/28315323/increased-serotonin-signaling-contributes-to-the-warburg-effect-in-pancreatic-tumor-cells-under-metabolic-stress-and-promotes-growth-of-pancreatic-tumors-in-mice
#15
Shu-Heng Jiang, Jun Li, Fang-Yuan Dong, Jian-Yu Yang, De-Jun Liu, Xiao-Mei Yang, Ya-Hui Wang, Min-Wei Yang, Xue-Liang Fu, Xiao-Xin Zhang, Qing Li, Xiu-Feng Pang, Yan-Miao Huo, Jiao Li, Jun-Feng Zhang, Ho-Young Lee, Su-Jae Lee, Wen-Xin Qin, Jian-Ren Gu, Yong-Wei Sun, Zhi-Gang Zhang
BACKGROUND & AIMS: The desmoplasia and poor vascularity cause severe metabolic stress in pancreatic ductal adenocarcinomas (PDACs). Serotonin (5-HT) is a neuromodulator with neurotransmitter and neuroendocrine functions that contributes to tumorigenesis. We investigated the role of 5-HT signaling in the growth of pancreatic tumors. METHODS: We measured the levels of proteins that regulate 5-HT synthesis, packaging, and degradation in pancreata from Kras(G12D/+); Trp53(R172H/+); Pdx1-Cre; (KPC) mice, which develop pancreatic tumors, as well as in PDAC cell lines and a tissue microarray containing 81 human PDAC samples...
March 14, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28302031/hif1a-is-overexpressed-in-medulloblastoma-and-its-inhibition-reduces-proliferation-and-increases-epas1-and-atg16l1-methylation
#16
Gustavo Alencastro Veiga Cruzeiro, Maristella Bergamo Dos Reis, Vanessa Silva Silveira, Régia Caroline Peixoto Lira, Carlos Gilberto Carlotti, Luciano Neder, Ricardo Santos Oliveira, José Andres Yunes, Silvia Regina Brandalise, Simone Aguiar, Agda Karina Eterovic, Luiz Gonzaga Tone, Carlos Alberto Scrideli, Elvis Terci Valera
BACKGROUND: Genetic and epigenetic modifications are closely related to tumor initiation and progression and can provide guidance for understanding tumor functioning, potentially leading to the discovery of new therapies. Studies have associated hypoxia-related genes to tumor progression and chemo/radioresistance in brain tumors. Information on the expression profile of hypoxia-related genes in pediatric medulloblastoma, although scarce, may reveal relevant information that could support treatment decisions...
March 15, 2017: Current Cancer Drug Targets
https://www.readbyqxmd.com/read/28283822/antiproliferative-activity-of-vitexin-2-o-xyloside-and-avenanthramides-on-caco-2-and-hepg2-cancer-cells-occurs-through-apoptosis-induction-and-reduction-of-pro-survival-mechanisms
#17
Emanuele Salvatore Scarpa, Elena Antonini, Francesco Palma, Michele Mari, Paolino Ninfali
PURPOSE: CaCo-2 colon cancer cells and HepG2 liver cancer cells represent two malignant cell lines, which show a high resistance to apoptosis induced by the conventional anticancer drugs. Vitexin-2-O-xyloside (XVX) and avenanthramides (AVNs) are naturally occurring dietary agents from Beta vulgaris var. cicla L. and Avena sativa L., respectively. The aim of this work was to evaluate the antiproliferative effects and the reduction of the pro-survival mechanisms exerted by XVX and AVNs, used individually and in combination, in CaCo-2 and HepG2 cancer cells...
March 10, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28283801/serum-amyloid-a1-is-upregulated-in-human-glioblastoma
#18
Franciele Hinterholz Knebel, Miyuki Uno, Thais F Galatro, Luziane Potrich Bellé, Sueli Mieko Oba-Shinjo, Suely Kazue N Marie, Ana Campa
Serum amyloid A1 (SAA1) is a sensitive acute phase reactant primarily produced by the liver in response to acute inflammation. We have recently shown that SAA affects proliferation, migration, and invasion of glioblastoma cell lines, which suggest its participation in the malignant process. Consistently, levels of SAA have been used as a non-invasive biomarker for the prognosis of many cancers. In this study, we aimed to investigate SAA serum levels and expression of SAA genes in human astrocytomas tissues...
March 11, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28281307/integrated-expression-analysis-identifies-transcription-networks-in-mouse-and-human-gastric-neoplasia
#19
Zheng Chen, Mohammed Soutto, Bushra Rahman, Muhammad W Fazili, DunFa Peng, Maria Blanca Piazuelo, Heidi Chen, M Kay Washington, Yu Shyr, Wael El-Rifai
Gastric cancer (GC) is a leading cause of cancer-related deaths worldwide. The Tff1 knockout (KO) mouse model develops gastric lesions that include low-grade dysplasia (LGD), high-grade dysplasia (HGD), and adenocarcinomas. In this study, we used Affymetrix microarrays gene expression platforms for analysis of molecular signatures in the mouse stomach [Tff1-KO (LGD) and Tff1 wild-type (normal)] and human gastric cancer tissues and their adjacent normal tissue samples. Combined integrated bioinformatics analysis of mouse and human datasets indicated that 172 genes were consistently deregulated in both human gastric cancer samples and Tff1-KO LGD lesions (P < ...
March 9, 2017: Genes, Chromosomes & Cancer
https://www.readbyqxmd.com/read/28257048/vanillin-suppresses-cell-motility-by-inhibiting-stat3-mediated-hif-1%C3%AE-mrna-expression-in-malignant-melanoma-cells
#20
Eun-Ji Park, Yoon-Mi Lee, Taek-In Oh, Byeong Mo Kim, Beong-Ou Lim, Ji-Hong Lim
Recent studies have shown that vanillin has anti-cancer, anti-mutagenic, and anti-metastatic activity; however, the precise molecular mechanism whereby vanillin inhibits metastasis and cancer progression is not fully elucidated. In this study, we examined whether vanillin has anti-cancer and anti-metastatic activities via inhibition of hypoxia-inducible factor-1α (HIF-1α) in A2058 and A375 human malignant melanoma cells. Immunoblotting and quantitative real time (RT)-PCR analysis revealed that vanillin down-regulates HIF-1α protein accumulation and the transcripts of HIF-1α target genes related to cancer metastasis including fibronectin 1 (FN1), lysyl oxidase-like 2 (LOXL2), and urokinase plasminogen activator receptor (uPAR)...
March 1, 2017: International Journal of Molecular Sciences
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