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https://www.readbyqxmd.com/read/28810656/hypoxia-inducible-factor-1%C3%AE-participates-in-hypoxia-induced-epithelial-mesenchymal-transition-via-response-gene-to-complement-32
#1
Liang Zhu, Qiu Zhao
The aim of the present study was to explore the function of response gene to complement 32 (RGC-32) in hypoxia-induced epithelial-mesenchymal transition (EMT) in pancreatic cancer. Three kinds of hypoxia-inducible factor 1α (HIF-1α) small interfering (si)RNA were synthesized and the different effects on the expression of HIF-1α were detected by western blotting. In human pancreatic cancer BxPC-3 cells, HIF-1α levels were diminished using siRNA transfection or HIF-1α inhibitor pretreatment, and the expression levels of RGC-32 and EMT-associated proteins were analyzed using reverse transcription-quantitative polymerase chain reaction and western blotting...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28803245/mir-143-5p-deficiency-triggers-emt-and-metastasis-by-targeting-hif-1%C3%AE-in-gallbladder-cancer
#2
Min He, Ming Zhan, Wei Chen, Sunwang Xu, Manmei Long, Hui Shen, Yongheng Shi, Qiang Liu, Man Mohan, Jian Wang
BACKGROUND/AIMS: Early metastasis plays a pivotal role in tumor-caused death in gallbladder cancer (GBC) patients. Increasing evidence suggest that miR-143-5p is an active player involved in cancer metastasis and a potential therapeutic target. However, its role in the development of GBC cells remains unclear. The aim of this study is to reveal the inhibiting effects of miR-143-5p on the proliferation and metastasis in GBC. METHODS: Quantitative real-time PCR were used to investigate miR-143-5p and its target HIF-1α mRNA levels...
August 11, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28798776/protective-effects-of-chronic-intermittent-hypobaric-hypoxia-pretreatment-against-aplastic-anemia-through-improving-the-adhesiveness-and-stress-of-mesenchymal-stem-cells-in-rats
#3
Jing Yang, Li Zhang, Handong Wang, Zan Guo, Yixian Liu, Yi Zhang, Chuan Wang, Quanhai Li
Aplastic anemia (AA) is a common malignant blood disease, and chronic intermittent hypobaric hypoxia (CIHH) has a beneficial effect against different diseases. The aim of the present study was to investigate the protective effect of CIHH against AA and underlying mechanisms. 5-Fluorouracil and busulfan treatment induced AA model in rats with reduction of hematological parameters and bone marrow tissue injury and decrease of the colony numbers of progenitor cells. CIHH pretreatment significantly reduced the incidence rate of AA and alleviated above symptoms in AA model...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28796315/senp1-hif-1%C3%AE-feedback-loop-modulates-hypoxia-induced-cell-proliferation-invasion-and-emt-in-human-osteosarcoma-cells
#4
Xiaowei Wang, Xiaoju Liang, Huan Liang, Bing Wang
Hypoxia is an element intrinsic to most solid-tumor microenvironments, including that of osteosarcoma (OS), and is associated with resistance to therapy, poor survival, and a malignant phenotype. The purpose of the present study was to investigate the role and underlying mechanism of SUMO-specific protease 1 (SENP1)/hypoxia-inducible factor-1α (HIF-1α) feedback loop in hypoxic microenvironment of OS. We observed that the expression of SENP1 was remarkably upregulated in OS cells. Additionally, there was a concomitant high expression of HIF-1α and SENP1 in MG-63 cells under a hypoxic microenvironment...
August 10, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28794399/dec1-promotes-hypoxia-induced-epithelial-mesenchymal-transition-emt-in-human-hepatocellular-carcinoma-cells
#5
Keishu Murakami, Yunyan Wu, Tadaatsu Imaizumi, Yuka Aoki, Qiang Liu, Xu Yan, Hiroko Seino, Tadashi Yoshizawa, Satoko Morohashi, Yukio Kato, Hiroshi Kijima
Differentiated embryonic chondrocyte (DEC) 1 has been reported to be involved in cell differentiation, hypoxia response, and cancer progression. Recent studies have demonstrated that hypoxia-inducible factor (HIF)-1α induces epithelial-mesenchymal transition (EMT) in carcinoma cells to facilitate cell invasiveness and metastasis. However, it remains unclear whether DEC1 participates in hypoxia-mediated EMT processes. In the present study, we reported that hypoxia induced DEC1 expression in hepatocellular carcinoma (HCC) HepG2 cells, and DEC1 negatively regulated expression of HIF-1α and E-cadherin in transcriptional/translational levels...
2017: Biomedical Research
https://www.readbyqxmd.com/read/28767392/melatonin-suppresses-hepatocellular-carcinoma-progression-via-lncrna-cps1-it-mediated-hif-1%C3%AE-inactivation
#6
Tong-Hong Wang, Chi-Hao Wu, Chau-Ting Yeh, Shih-Chi Su, Shih-Min Hsia, Kung-Hao Liang, Chin-Chuan Chen, Chuen Hsueh, Chi-Yuan Chen
Melatonin is the primary pineal hormone that relays light/dark cycle information to the circadian system. It was recently reported to exert intrinsic antitumor activity in various cancers. However, the regulatory mechanisms underlying the antitumor activity of melatonin are poorly understood. Moreover, a limited number of studies have addressed the role of melatonin in hepatocellular carcinoma (HCC), a major life-threatening malignancy in both sexes in Taiwan. In this study, we investigated the antitumor effects of melatonin in HCC and explored the regulatory mechanisms underlying these effects...
July 18, 2017: Oncotarget
https://www.readbyqxmd.com/read/28764862/ferulic-acid-promotes-osteogenesis-of-bone-marrow-derived-mesenchymal-stem-cells-by-inhibiting-microrna-340-to-induce-%C3%AE-catenin-expression-through-hypoxia
#7
Kewei Du, Ziqiang Li, Xuchen Fang, Tingwei Cao, Yaozeng Xu
Osteogenic differentiation is regulated through multiple signaling networks that may include responses to hypoxia. Antioxidant ferulic acid (FA) can promote hypoxia signaling by inducing hypoxic-induced factor (HIF). However, whether FA could affect osteogenesis has not been explored. We examined human bone marrow-derived mesenchymal stem cell (MSC) following FA treatment. The expression of β-catenin was measured, and candidate microRNAs that target β-catenin were studied. The involvement of hypoxia was investigated in miR-340-5p that contains hypoxia response elements (HRE) in the promoter region...
July 22, 2017: European Journal of Cell Biology
https://www.readbyqxmd.com/read/28764685/notch1-signaling-induces-epithelial-mesenchymal-transition-in-lens-epithelium-cells-during-hypoxia
#8
Lei Liu, Wei Xiao
BACKGROUND: Posterior Capsular Opacification (PCO) is one of the most common complications of cataract surgery which can result in severe visual damage. Epithelial-Mesenchymal Transition (EMT) of lens epithelium cells (LEC) is the pathological basis of PCO. Recent research showed that hypoxia acted as an inducer of EMT through a Notch1/Snail1/E-cadherin pathway. However, it remains unclear whether the Notch1/Snail1/E-cadherin pathway is involved in PCO under hypoxia. METHODS: The morphology of SRA01/04 cells treating with Cobalt Chloride (CoCl2) was observed and the markers of EMT and Notch1/Snail1/E-cadherin pathway were analyzed by Western blot and Immunocytochemistry assay...
August 1, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28742200/hypoxia-promotes-epithelial-mesenchymal-transition-of-hepatocellular-carcinoma-cells-via-inducing-twist1-expression
#9
X-D Zhang, X-Q Dong, J-L Xu, S-C Chen, Z Sun
OBJECTIVE: To investigate whether hypoxia microenvironment induced hepatocellular carcinoma cells SMMC-7721 epithelial-mesenchymal transition (EMT) and to explore the underlying molecular mechanism. MATERIALS AND METHODS: In this study, SMMC-7721 cells were cultured under normoxia and hypoxia conditions, respectively. RT-PCR and Western blot were used to monitor the expression level of EMT-related markers, E-cadherin, and vimentin, as well as hypoxia inducible factor-1α (HIF-1α) and Twist1...
July 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28741521/hypoxia-inducible-factors-master-regulators-of-cancer-progression
#10
REVIEW
Luana Schito, Gregg L Semenza
Intratumoral hypoxia (reduced O2 availability) is a common finding in human cancer and leads to increased activity of hypoxia-inducible factors (HIFs), which regulate the expression of genes that contribute to angiogenesis, metabolic reprogramming, extracellular matrix remodeling, epithelial-mesenchymal transition, motility, invasion, metastasis, cancer stem cell maintenance, immune evasion, and resistance to chemotherapy and radiation therapy. Conventional anticancer therapies target well-oxygenated and proliferating cancer cells, whereas there are no approved therapies that target hypoxic cancer cells, despite growing clinical and experimental evidence indicating that intratumoral hypoxia is a critical microenvironmental factor driving cancer progression...
December 2016: Trends in Cancer
https://www.readbyqxmd.com/read/28741069/microrna-100-shuttled-by-mesenchymal-stem-cell-derived-exosomes-suppresses-in-vitro-angiogenesis-through-modulating-the-mtor-hif-1%C3%AE-vegf-signaling-axis-in-breast-cancer-cells
#11
Katayoon Pakravan, Sadegh Babashah, Majid Sadeghizadeh, Seyed Javad Mowla, Majid Mossahebi-Mohammadi, Farangis Ataei, Nasim Dana, Mohammad Javan
BACKGROUND: Human mesenchymal stem cells (MSCs) have been shown to be involved in the formation and modulation of tumor stroma and in interacting with tumor cells, partly through their secretome. Exosomes are nano-sized intraluminal multi-vesicular bodies secreted by most types of cells and have been found to mediate intercellular communication through the transfer of genetic information via coding and non-coding RNAs to recipient cells. Since exosomes are considered as protective and enriched sources of shuttle microRNAs (miRNAs), we hypothesized that exosomal transfer of miRNAs from MSCs may affect tumor cell behavior, particularly angiogenesis...
July 24, 2017: Cellular Oncology (Dordrecht)
https://www.readbyqxmd.com/read/28713928/upregulation-of-wnt-signaling-under-hypoxia-promotes-lung-cancer-progression
#12
Chun-Fu Hong, Wei-You Chen, Cheng-Wen Wu
The hypoxic tumor microenvironment induces epithelial-mesenchymal transition (EMT) in tumor cells and increases tumor cell malignancy. Previous studies indicated that malfunction of Wnt signaling is observed in some lung cancer patients. Athough crosstalk between hypoxia and Wnt signaling in tumor cells has recently been revealed, the detailed underlying mechanisms have not been well defined. In the present study, we demonstrated that hypoxia in lung adenocarcinoma cells can enhance Wnt signaling activity by stabilizing β-catenin and altering its localization into the nucleus...
July 12, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28711911/human-steroid-sulfatase-induces-wnt-%C3%AE-catenin-signaling-and-epithelial-mesenchymal-transition-by-upregulating-twist1-and-hif-1%C3%AE-in-human-prostate-and-cervical-cancer-cells
#13
Sangyun Shin, Hee-Jung Im, Yeo-Jung Kwon, Dong-Jin Ye, Hyoung-Seok Baek, Donghak Kim, Hyung-Kyoon Choi, Young-Jin Chun
Steroid sulfatase (STS) catalyzes the hydrolysis of estrone sulfate and dehydroepiandrosterone sulfate (DHEAS) to their unconjugated biologically active forms. Although STS is considered a therapeutic target for estrogen-dependent diseases, the cellular functions of STS remain unclear. We found that STS induces Wnt/β-catenin s Delete ignaling in PC-3 and HeLa cells. STS increases levels of β-catenin, phospho-β-catenin, and phospho-GSK3β. Enhanced translocation of β-catenin to the nucleus by STS might activate transcription of target genes such as cyclin D1, c-myc, and MMP-7...
June 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28705232/hypoxia-inducible-factor-2%C3%AE-promotes-tumor-progression-and-has-crosstalk-with-wnt-%C3%AE-catenin-signaling-in-pancreatic-cancer
#14
Qi Zhang, Yu Lou, Jingying Zhang, Qihan Fu, Tao Wei, Xu Sun, Qi Chen, Jiaqi Yang, Xueli Bai, Tingbo Liang
BACKGROUND: Pancreatic cancer is a devastating disease that is characterized by persistent hypoxia. The roles of hypoxia-inducible factor-2α (hif-2α) are different to those of hif-1α, although both are critical for tumor cells to adapt to the hypoxic microenvironment. However, unlike the well-studied hif-1α, the role of hif-2α in tumors, including pancreatic cancer, is poorly understood. METHODS: Herein, we used a mutated hif-2α (A530T) to figure out the problem that wild-type hif-2α is quickly degraded which limits the study of its function...
July 14, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/28704917/the-role-of-hypoxia-on-the-acquisition-of-epithelial-mesenchymal-transition-and-cancer-stemness-a-possible-link-to-epigenetic-regulation
#15
REVIEW
Chang Dong Yeo, Nahyeon Kang, Su Yeon Choi, Bit Na Kim, Chan Kwon Park, Jin Woo Kim, Young Kyoon Kim, Seung Joon Kim
A hypoxic microenvironment leads to cancer progression and increases the metastatic potential of cancer cells within tumors via epithelial-mesenchymal transition (EMT) and cancer stemness acquisition. The hypoxic response pathway can occur under oxygen tensions of < 40 mmHg through hypoxia-inducible factors (HIFs), which are considered key mediators in the adaptation to hypoxia. Previous studies have shown that cellular responses to hypoxia are required for EMT and cancer stemness maintenance through HIF-1α and HIF-2α...
July 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/28704726/bnip3-induction-by-hypoxia-stimulates-fasn-dependent-free-fatty-acid-production-enhancing-therapeutic-potential-of-umbilical-cord-blood-derived-human-mesenchymal-stem-cells
#16
Hyun Jik Lee, Young Hyun Jung, Gee Euhn Choi, So Hee Ko, Sei-Jung Lee, Sang Hun Lee, Ho Jae Han
Mitophagy under hypoxia is an important factor for maintaining and regulating stem cell functions. We previously demonstrated that fatty acid synthase (FASN) induced by hypoxia is a critical lipid metabolic factor determining the therapeutic efficacy of umbilical cord blood-derived human mesenchymal stem cells (UCB-hMSCs). Therefore, we investigated the mechanism of a major mitophagy regulator controlling lipid metabolism and therapeutic potential of UCB-hMSCs. This study revealed that Bcl2/adenovirus E1B 19kDa protein-interacting protein 3 (BNIP3)-dependent mitophagy is important for reducing mitochondrial reactive oxygen species accumulation, anti-apoptosis, and migration under hypoxia...
July 4, 2017: Redox Biology
https://www.readbyqxmd.com/read/28699703/a-positive-feedback-loop-promotes-hif-1%C3%AE-stability-through-mir-210-mediated-suppression-of-runx3-in-paraquat-induced-emt
#17
Yong Zhu, Jinfeng Wang, Xiaoxiao Meng, Hui Xie, Jiuting Tan, Xinkun Guo, Peng Han, Ruilan Wang
Irreversible pulmonary fibrosis induced by paraquat (PQ) poisoning is the major cause of death in patients with PQ poisoning. The epithelial-mesenchymal transition (EMT) is postulated to be one of the main mechanisms of pulmonary fibrosis. Here, we investigated the role of miR-210 in PQ-induced EMT and its relationship with hypoxia-inducible factor-1α (HIF-1α). Western blotting, immunofluorescence, immunoprecipitation and other methods were used in this study. We found that miR-210 expression was significantly increased after PQ poisoning, and it may be regulated by HIF-1α...
July 12, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28689812/ibmx-protects-human-proximal-tubular-epithelial-cells-from-hypoxic-stress-through-suppressing-hypoxia-inducible-factor-1%C3%AE-expression
#18
Arif Ul Hasan, Wararat Kittikulsuth, Fuminori Yamaguchi, Tuba Musarrat Ansary, Asadur Rahman, Yuki Shibayama, Daisuke Nakano, Hirofumi Hitomi, Masaaki Tokuda, Akira Nishiyama
Hypoxia predisposes renal fibrosis. This study was conducted to identify novel approaches to ameliorate the pathogenic effect of hypoxia. Using human proximal tubular epithelial cells we showed that a pan-phosphodiesterase (PDE) inhibitor, 3-isobutyl-1-methylxanthine (IBMX) dose and time dependently downregulated hypoxia-inducible factor 1α (HIF-1α) mRNA expression, which was further augmented by addition of a transcriptional inhibitor, actinomycin D. IBMX also increased the cellular cyclic adenosine monophosphate (cAMP) level...
July 6, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28687790/chronic-inflammation-triggered-by-the-nlrp3-inflammasome-in-myeloid-cells-promotes-growth-plate-dysplasia-by-mesenchymal-cells
#19
Chun Wang, Can-Xin Xu, Yael Alippe, Chao Qu, Jianqiu Xiao, Ernestina Schipani, Roberto Civitelli, Yousef Abu-Amer, Gabriel Mbalaviele
Skeletal complications are common features of neonatal-onset multisystem inflammatory disease (NOMID), a disorder caused by NLRP3-activating mutations. NOMID mice in which NLRP3 is activated globally exhibit several characteristics of the human disease, including systemic inflammation and cartilage dysplasia, but the mechanisms of skeletal manifestations remain unknown. In this study, we find that activation of NLRP3 in myeloid cells, but not mesenchymal cells triggers chronic inflammation, which ultimately, causes growth plate and epiphyseal dysplasia in mice...
July 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28684234/roflumilast-treatment-inhibits-lung-carcinogenesis-in-benzo-a-pyrene-induced-murine-lung-cancer-model
#20
Chang Dong Yeo, Young Ae Kim, Hwa Young Lee, Jin Woo Kim, Seung Joon Kim, Sang Haak Lee, Young Kyoon Kim
Roflumilast, a potent and selective inhibitor of phosphodiesterase-4 (PDE4), has been used in treatment of COPD. PDE4 inhibitor is associated with inhibition of chronic airway inflammation, oxidative stress, and mesenchymal markers in B(a)P-induced lung tumors. The aim of this study was to assess whether roflumilast alone or added to inhaled budesonide might have dose-dependent inhibition on lung carcinogenesis induced by carcinogen B(a)P in mice. Female A/J mice were given a single dose of benzo(a)pyrene. Administration of roflumilast (1mg/kg or 5mg/kg) via oral gavage and aerosolized budesonide (2...
July 3, 2017: European Journal of Pharmacology
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