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HIF-1α AND tumor

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https://www.readbyqxmd.com/read/30513863/low-hif-1%C3%AE-and-low-egfr-mrna-expression-significantly-associate-with-poor-survival-in-soft-tissue-sarcoma-patients-the-proteins-react-differently
#1
Swetlana Rot, Helge Taubert, Matthias Bache, Thomas Greither, Peter Würl, Hans-Jürgen Holzhausen, Alexander W Eckert, Dirk Vordermark, Matthias Kappler
In various tumors, the hypoxia inducible factor-1α ( HIF-1α ) and the epidermal growth factor-receptor ( EGFR ) have an impact on survival. Nevertheless, the prognostic impact of both markers for soft tissue sarcoma (STS) is not well studied. We examined 114 frozen tumor samples from adult soft tissue sarcoma patients and 19 frozen normal tissue samples. The mRNA levels of HIF-1α, EGFR, and the reference gene hypoxanthine phosphoribosyltransferase (HPRT) were quantified using a multiplex qPCR technique. In addition, levels of EGFR or HIF-1α protein were determined from 74 corresponding protein samples using ELISA techniques...
December 3, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/30506278/microvesicles-derived-from-human-bone-marrow-mesenchymal-stem-cells-promote-u2os-cell-growth-under-hypoxia-the-role-of-pi3k-akt-and-hif-1%C3%AE
#2
Shanshan Lin, Bo Zhu, Guozhi Huang, Qing Zeng, Chuhuai Wang
Studies have demonstrated that mesenchymal stem cells (MSCs) can promote tumor growth, and MSC microvesicles (MVs) are very important in the tumor microenvironment and information transfer between cells during tumorigenesis and development. However, the potential effects and mechanisms of MSC-MVs on tumor growth are still controversial. Here in this study, we investigated the roles and effects of human bone marrow MSC-MVs (hBMSC-MVs) on human osteosarcoma (U2OS) cell growth under hypoxia in vitro and in vivo...
November 30, 2018: Human Cell
https://www.readbyqxmd.com/read/30504760/hypoxia-inducible-factor-1-%C3%AE-hif-1%C3%AE-induces-apoptosis-of-human-uterosacral-ligament-fibroblasts-through-the-death-receptor-and-mitochondrial-pathways
#3
Xinrui Zhao, Lidong Liu, Rui Li, Xuan Wei, Wenqing Luan, Peishu Liu, Jing Zhao
BACKGROUND Hypoxia induces cell apoptosis in the uterosacral ligaments of patients with pelvic organ prolapse by upregulation of hypoxia-inducible factor-1α (HIF-1α). This study aimed to investigate the effects of HIF-1α on human uterosacral ligament fibroblasts (hUSLFs) following treatment with the chemical inducer of hypoxia, cobalt chloride (CoCl2), and to explore the underlying mechanisms. MATERIAL AND METHODS Ten women who underwent hysterectomy for benign disease provided uterosacral ligament tissue for cell extraction...
December 3, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/30500418/histone-deacetylase-1-as-a-prognostic-factor-and-mediator-of-gastric-cancer-progression-by-enhancing-glycolysis
#4
Zhonghua Jiang, Hongmei Yang, Xiuyun Zhang, Zhendong Wang, Rong Rong, Xiaohong Wang
Histone deacetylase 1 (HDAC1) has been shown to be closely associated with tumor development. We investigated its effects on survival and biological behavior in gastric cancer (GC). HDAC1 expression and glycolysis activity were analyzed in a cohort of 252 samples of primary GC tumors and in vitro study. High HDAC1 (HDAC1High ) staining was seen in 60.7% patients with GCs, which was significantly greater than was seen in normal epithelial cells (19.4%; P<.005). HDAC1High expression was associated with larger tumor size (P=...
November 27, 2018: Human Pathology
https://www.readbyqxmd.com/read/30497328/different-effects-of-long-noncoding-rna-ndrg1-ot1-fragments-on-ndrg1-transcription-in-breast-cancer-cells-under-hypoxia
#5
Ching-Ching Yeh, Jun-Liang Luo, Nam Nhut Phan, Yi-Chun Cheng, Lu-Ping Chow, Mong-Hsun Tsai, Eric Y Chuang, Liang-Chuan Lai
Hypoxia plays a crucial role in the aggressiveness of solid tumors by driving multiple signaling pathways. Recently, long non-coding RNA (lncRNA) has been reported to promote or inhibit tumor aggressiveness by regulating gene expression. Previous studies in our laboratory found that the lncRNA NDRG1-OT1 is significantly up-regulated under hypoxia and inhibits its target gene NDRG1 at both the mRNA and protein levels. At the protein level, NDRG1-OT1 increases NDRG1 degradation via ubiquitin-mediated proteolysis...
November 30, 2018: RNA Biology
https://www.readbyqxmd.com/read/30488478/%C3%AE-trcp-upregulates-hif-1-in-prostate-cancer-cells
#6
Maya Cohen, Sharon Amir, Maya Golan, Yinon Ben-Neriah, Nicola J Mabjeesh
The substantial availability of hypoxia-inducible factor 1 (HIF-1) for pathophysiological states, such as malignancies and ischemia, is primarily regulated post-translationally through the ubiquitin proteolytic system. The balance between degradation and stabilization of HIF-1α protein is determined by specific E3 ligases. In our search for new E3 ligases that might affect HIF-1α protein expression, we studied the effects of beta-transducin repeat-containing protein (β-TrCP) on the hypoxic pathway in cancer cells...
November 28, 2018: Prostate
https://www.readbyqxmd.com/read/30485482/lncrna-nuclear-enriched-abundant-transcript-1-promotes-cell-proliferation-and-invasion-by-targeting-mir-186-5p-hif-1%C3%AE-in-osteosarcoma
#7
Hongyu Tan, Liang Zhao
Increasing evidence shows that the long noncoding RNA nuclear enriched abundant transcript 1 (NEAT1) plays important roles in tumor progression. However, the function and the underlying mechanism of NEAT1 in osteosarcoma (OS) remain unclear. In the present study, we found that NEAT1 expression was significantly upregulated in OS tissues and cell lines. High NEAT1 expression was closely associated with advanced clinicopathologic features and poor overall survival of patients with OS. Using in vitro function assay, we found that NEAT1 could promote the proliferation, invasion, and epithelial-mesenchymal transition (EMT) process of OS cells...
November 28, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/30479372/kr%C3%A3-ppel-like-factor-8-regulates-vegfa-expression-and-angiogenesis-in-hepatocellular-carcinoma
#8
Sanuo Cheng, Xingping Zhang, Yali Xu, Xiaobo Dai, Jiachu Li, Tao Zhang, Xiaopin Chen
Tumor angiogenesis plays a critical role in hepatocellular carcinoma (HCC) development and progression, but its mechanism is unclear. Krüppel-like factor 8 (KLF8) is a transcription factor that plays an important role in HCC progression. Here, we investigated the role of KLF8 in angiogenesis in HCC and its possible mechanism. Immunohistochemistry, quantitative RT-PCR, western blotting, promoter reporter assays, chromatin immunoprecipitation (ChIP), and chicken chorioallantoic membrane (CAM) and nude mouse tumor models were used to show that the mRNA and protein expression levels of KLF8 and VEGFA are highly correlated in HCC tissue samples...
November 27, 2018: Scientific Reports
https://www.readbyqxmd.com/read/30479336/vasculogenic-mimicry-formation-in-ebv-associated-epithelial-malignancies
#9
Tong Xiang, Yu-Xin Lin, Wenlong Ma, Hao-Jiong Zhang, Ke-Ming Chen, Gui-Ping He, Xiao Zhang, Miao Xu, Qi-Sheng Feng, Ming-Yuan Chen, Mu-Sheng Zeng, Yi-Xin Zeng, Lin Feng
Epstein-Barr virus (EBV)-associated epithelial cancers, including nasopharyngeal carcinoma (NPC) and approximately 10% of gastric cancers, termed EBVaGC, represent 80% of all EBV-related malignancies. However, the exact role of EBV in epithelial cancers remains elusive. Here, we report that EBV functions in vasculogenic mimicry (VM). Epithelial cancer cells infected with EBV develop tumor vascular networks that correlate with tumor growth, which is different from endothelial-derived angiogenic vessels and is VEGF-independent...
November 27, 2018: Nature Communications
https://www.readbyqxmd.com/read/30475758/targeted-regulation-by-rock2-on-bladder-carcinoma-via-wnt-signaling-under-hypoxia
#10
Junfeng Luo, Zhengda Lou, Junzheng Zheng
Bladder cancer is frequently occurred in urinary system and has complicated pathogenesis factors including both genetics and environmental factors that have not been fully illustrated. Hypoxia can further induce tumor progression. ROCK2 has abnormal expression in various tumors but its expression or functional role in bladder cancer have not been illustrated. In vitro cultured bladder cancer cell line T24 was randomly assigned into control group, hypoxia group (prepared under hypoxic culture), and ROCK2 siRNA group (transfected with ROCK2 siRNA after hypoxia treatment)...
November 11, 2018: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/30455960/cellular-density-dependent-increases-in-hif-1%C3%AE-compete-with-c-myc-to-down-regulate-human-ep4-receptor-promoter-activity-through-sp-1-binding-region
#11
Naofumi Seira, Kazuyuki Yamagata, Keijo Fukushima, Yumi Araki, Naoki Kurata, Naoki Yanagisawa, Masato Mashimo, Hiroyuki Nakamura, John W Regan, Toshihiko Murayama, Hiromichi Fujino
The up-regulated expression of E-type prostanoid (EP) 4 receptors has been implicated in carcinogenesis; however, the expression of EP4 receptors has also been reported to be weaker in tumor tissues than in normal tissues. Indeed, EP4 receptors have been suggested to play a role in the maintenance of colorectal homeostasis. This study aimed to examine the underlying mechanisms/reasons for why inconsistent findings have been reported regarding EP4 receptor expression levels in homeostasis and carcinogenesis by focusing on cellular densities...
December 2018: Pharmacology Research & Perspectives
https://www.readbyqxmd.com/read/30455857/hyperglycemia-aggravates-microenvironment-hypoxia-and-promotes-the-metastatic-ability-of-pancreatic-cancer
#12
Wei Li, Han Liu, Weikun Qian, Liang Cheng, Bin Yan, Liang Han, Qinhong Xu, Qingyong Ma, Jiguang Ma
Background: Diabetes mellitus and pancreatic cancer are intimately related. Our previous studies showed that high levels of blood glucose promote epithelial-mesenchymal transition of pancreatic cancer. In this study, we evaluated the relationship between hyperglycemia and hypoxic tumor microenvironments. Methods: HIF-1α expression was evaluated by immunohistochemistry in clinical pancreatic cancer tissues with or without diabetes mellitus. Statistcal analysis was performed to explore the relationship between HIF-1α expression and pathological features of patients with pancreatic cancer...
2018: Computational and Structural Biotechnology Journal
https://www.readbyqxmd.com/read/30431439/lactate-inhibits-atp6v0d2-expression-in-tumor-associated-macrophages-to-promote-hif-2%C3%AE-mediated-tumor-progression
#13
Na Liu, Jing Luo, Dong Kuang, Sanpeng Xu, Yaqi Duan, Yu Xia, Zhengping Wei, Xiuxiu Xie, Bingjiao Yin, Fang Chen, Shunqun Luo, Huicheng Liu, Jing Wang, Kan Jiang, Feili Gong, Zhao-Hui Tang, Xiang Cheng, Huabin Li, Zhuoya Li, Arian Laurence, Guoping Wang, Xiang-Ping Yang
Macrophages perform key functions in tissue homeostasis that are influenced by the local tissue environment. Within the tumor microenvironment tumor associated macrophages can be altered to acquire properties that enhance tumor growth. Here, we found lactate, a metabolite found in high concentration within the anaerobic tumor environment, activated mTORC1 that subsequently suppressed TFEB-mediated expression of a macrophage-specific vacuolar ATPase subunit ATP6V0d2. Atp6v0d2-/- mice were more susceptible to tumor growth with enhanced HIF-2α-mediated VEGF production in macrophages that display a more protumoral phenotype...
November 15, 2018: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/30431105/hif-1%C3%AE-contributes-to-tube-malformation-of-human-lymphatic-endothelial-cells-by-upregulating-vegfr-3
#14
Tao Han, Jun Yan, Haini Chen, Yi Ji, Jianbing Chen, Jie Cui, Weimin Shen, Jijun Zou
Hypoxia‑inducible factor‑1α (HIF‑1α) is upregulated in various tumors and associated with lymphangiogenesis and angiogenesis during tumor development and metastasis. However, the role of HIF‑1α in cystic lymphatic malformations (cLM) remains unclear. In the present study, expression of HIF‑1α and vascular endothelial growth factor receptor 3 (VEGFR‑3) was evaluated in 20 pairs of cLM specimens from patients who accepted curative surgery at Children's Hospital of Nanjing Medical University (Nanjing, China)...
January 2019: International Journal of Oncology
https://www.readbyqxmd.com/read/30425242/hypoxia-mediated-mitochondria-apoptosis-inhibition-induces-temozolomide-treatment-resistance-through-mir-26a-bad-bax-axis
#15
Xin Ge, Min-Hong Pan, Lin Wang, Wei Li, Chengfei Jiang, Jun He, Khaled Abouzid, Ling-Zhi Liu, Zhumei Shi, Bing-Hua Jiang
Glioblastoma multiforme (GBM) is one of the most hypoxic tumors of the central nervous system. Although temozolomide (TMZ) is an effective clinical agent in the GBM therapy, the hypoxic microenvironment remains a major barrier in glioma chemotherapy resistance, and the underlying mechanisms are poorly understood. Here, we find hypoxia can induce the protective response to mitochondrion via HIF-1α-mediated miR-26a upregulation which is associated with TMZ resistance in vitro and in vivo. Further, we demonstrated that HIF-1α/miR-26a axis strengthened the acquisition of TMZ resistance through prevention of Bax and Bad in mitochondria dysfunction in GBM...
November 13, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/30424475/the-dilemma-of-cure-and-damage-in-oligodendroglioma-ways-to-tip-the-balance-away-from-the-damage
#16
Ruurd Torensma
Current treatments for oligodendrogliomas are powerful but have a negative impact on the rest of the body. The bone marrow is damaged by the chemotherapeutics, but other parts of the body are also affected. In this paper, the current treatment method and its collateral damage is described. Therefore, therapies are needed that are more effective against the tumor while having less negative effects on the patient's quality of life. Some potential therapies include optimal removal of the tumor by fluorescent-guided surgery (FGS), intraoperative desorption electrospray ionization-mass spectrometry (DESI-MS), better monitoring of the effects of therapy by pseudo-coloring shades of gray of MRI pictures, and using recent data from RNA sequencing of single cells and immunotherapy...
November 12, 2018: Cancers
https://www.readbyqxmd.com/read/30423277/effects-of-simulated-heat-wave-and-ozone-on-high-fat-diet-apoe-deficient-mice
#17
Quan Quan Song, Jing Ping Niu, Shu Yu Zhang, Ting Ting Liang, Ji Zhou, Shan Shan Feng
OBJECTIVE: To discuss the cardiac toxicities of a heat waves and ozone exposure on cardiovascular diseases (CVDs) and explore a possible mechanism. METHODS: The incidence of ozone exposure combined with heat wave was simulated in the Shanghai Meteorological and Environmental Animal Exposure System (Shanghai-METAS). A total of 64 ApoE-/- mice, matched by weight, were randomly divided into 8 groups and exposed to heat wave conditions or ozone. The levels of creatine kinase (CK), D-lactate dehydrogenase (D-LDH), intercellular adhesion molecule 1 (sICAM-1), tumor necrosis factor alpha (TNF-α), nitric oxide (NO), endothelin-1 (ET-1), D-dimer (D2D), plasminogen activator inhibitor-1 (PAI-1) and blood lipid in plasma and heat shock protein-60 (HSP60), hypoxia inducible factor 1 alpha (HIF-1α), interleukin-6 (IL-6), C-reactive protein (CRP), superoxide dismutase (SOD), and malondialdehyde (MDA) in hearts were measured after exposure...
October 2018: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/30415904/hif-1%C3%AE-notch1-adam12-and-hb-egf-are-overexpressed-in-mucoepidermoid-carcinoma
#18
Dimitra Castelo Branco, Natacha Malu Miranda da Costa, Caio Tadashi Saab Abe, Maria Sueli da Silva Kataoka, João de Jesus Viana Pinheiro, Sérgio de Melo Alves Júnior
OBJECTIVE: Intratumoral hypoxia (IH) occurs during cellular proliferation of malignant tumors. This phenomenon is characterized by a decrease in oxygen levels in the neoplastic microenvironment. Throughout this condition, the proteins HIF-1α, NOTCH1, ADAM12, and HB-EGF can be activated, triggering signaling pathways associated with tumor invasiveness through invadopodia formation. This study aimed to evaluate the immunostaining of HIF-1α, NOTCH1, ADAM12, and HBEGF in 19 cases of mucoepidermoid carcinoma (MEC) and 10 samples of salivary glands (control group)...
October 5, 2018: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/30410397/dj-1-promotes-survival-of-human-colon-cancer-cells-under-hypoxia-by-modulating-hif-1%C3%AE-expression-through-the-pi3k-akt-pathway
#19
Hong Zheng, Chao Zhou, Xiao Lu, Quanxing Liu, Minqiang Liu, Guoqing Chen, Weigang Chen, Shuai Wang, Yuan Qiu
Background: Protein/nucleic acid deglycase (DJ-1) and hypoxia-inducible factor-1α (HIF-1α) play significant roles in the progression of various types of cancer and are associated with the phosphatidylinositol 3-kinase (PI3K) pathway. However, their functions in colorectal cancer (CRC) have not been identified. The aim of this study was to analyze the putative signaling pathway encompassing DJ-1, PI3K, and HIF-1α in a series of CRC tissues and cell lines. Purpose: This study aimed at exploring the expression status of DJ-1 in colon cancer and its role in survival of cancer cell lines...
2018: Cancer Management and Research
https://www.readbyqxmd.com/read/30402847/hif-1%C3%AE-restricts-proliferation-and-apoptosis-of-tca8113-cells-through-up-regulation-of-hippo-signaling-pathway-under-hypoxic-conditions
#20
J-Y Chen, Y-G Zhang, J-D Du
OBJECTIVE: The hypoxia-inducible factor-1α (HIF-1α) is a key factor for tumor cells adaptation to hypoxia. Studies have shown that under hypoxic conditions, HIF-1α expression was significantly increased in human tongue squamous cell carcinoma cells (Tca8113). This research aims to determine the exact mechanism of HIF-1α on the proliferation and apoptosis of Tca8113 cells. MATERIALS AND METHODS: Tca8113 cells were cultured under normoxia and hypoxia. Real Time-PCR and Western blot were used to measure the expression levels of HIF-1α and TAZ...
October 2018: European Review for Medical and Pharmacological Sciences
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