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https://www.readbyqxmd.com/read/28640996/a-polyoxometalate-based-radiosensitization-platform-for-treating-hypoxic-tumor-by-attenuating-radio-resistance-and-enhancing-radiation-response
#1
Yuan Yong, Chunfang Zhang, Zhanjun Gu, Jiangfeng Du, Zhao Guo, Xinghua Dong, Jiani Xie, Guangjin Zhang, Xiangfeng Liu, Yuliang Zhao
Radioresistance is one of the undesirable impediments in hypoxia tumor, which sharply diminishes therapeutic effectiveness of radiotherapy and eventually results in the failure of their treatments. An attractive strategy for attenuating radioresistance is developing an ideal radiosensitization system with admirable radiosensitization capacity to attenuate tumor hypoxia and reinforce radiotherapy response in hypoxia tumor. Therefore, we describe the development of Gd-containing polyoxometalates-conjugated chitosan (GdW10@CS nanosphere) as a radiosensitization system for simultanous extrinsic and intrinsic radiosensitization, by generating overabundance cytotoxic reactive oxygen species (ROS) using high energy X-ray stimulation and mediating the hypoxia-inducible factor-1a (HIF-1a) siRNA to down-regulate HIF-1α expression and suppress the broken double-stranded DNA self-healing...
June 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/28594115/therapeutic-relevance-of-ozone-therapy-in-degenerative-diseases-focus-on-diabetes-and-spinal-pain
#2
REVIEW
Nady Braidy, Morteza Izadi, Antoni Sureda, Nematollah Jonaidi-Jafari, Abdolali Banki, Seyed Fazel Nabavi, Seyed Mohammad Nabavi
Ozone, one of the most important air pollutants, is a triatomic molecule containing three atoms of oxygen that results in an unstable form due to its mesomeric structure. It has been well-known that ozone has potent ability to oxidize organic compounds and can induce respiratory irritation. Although ozone has deleterious effects, many therapeutic effects have also been suggested. Since last decades, the therapeutic potential of ozone has gained much attention through its strong capacity to induce controlled and moderated oxidative stress when administered in precise therapeutic doses...
June 8, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28554272/angiogenesis-in-jak2-v617f-positive-myeloproliferative-neoplasms-and-ruxolitinib-decrease-vegf-hif-1-enesis-in-jak2-v617f-positive-cells
#3
Zhiyong Cheng, Jianzhu Fu, Guimin Liu, Lijun Zhang, Qian Xu, Su-Yun Wang
Angiogenesis and JAK2 V617F mutation are common in BCR-ABL1 negative myeloproliferative neoplasms (MPNs). Ruxolitinib, a JAK inhibitor, is an effective treatment for some MPNs. However, the relationship between angiogenesis and JAK2 V617F and the effects of ruxolitinib on angiogenesis are still unknown. Here, we observed the correlation of JAK2 V617F mutation burden with VEGF, HIF-1a and microvascular density (MVD) in MPNs. We investigate the effect of ruxolitinib on the expression of VEGF and HIF-1α in JAK2 V617F positive cells...
May 30, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28485808/influences-of-rfa-combined-with-tace-on-the-hif-1%C3%AE-and-egr-level-of-patients-with-primary-hepatic-carcinoma
#4
G Yuan, C-L Zeng, D-D Zhu, X-J Shi
OBJECTIVE: To discuss the influences of radiofrequency ablation (RFA) combined with hepatic arterial chemoembolization on the expression level of immunity and hypoxia-inducible factor (HIF-1a) and early growth response protein2 (EGR2) of patients with hepatocarcinoma. PATIENTS AND METHODS: Patients with primary hepatic carcinoma treated in our hospital from 2011 to 2014 were divided into research group (RFA+TACE) and control group (TACE) according to different therapy methods, with 72 patients in each group...
April 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28460338/iron-overload-promotes-erythroid-apoptosis-through-regulating-hif-1a-ros-signaling-pathway-in-patients-with-myelodysplastic-syndrome
#5
Qing-Qing Zheng, You-Shan Zhao, Juan Guo, Si-da Zhao, Lu-Xi Song, Cheng-Ming Fei, Zheng Zhang, Xiao Li, Chun-Kang Chang
Erythroid apoptosis increases significantly in myelodysplastic syndrome (MDS) patients with iron overload, but the underlying mechanism is not fully clear. In this study, we aim to explore the effect of HIF-1a/ROS on erythroid apoptosis in MDS patients with iron overload. We found that iron overload injured cellular functions through up-regulating ROS levels in MDS/AML cells, including inhibited cell viability, increased cell apoptosis and blocked cell cycle at G0/G1 phase. Interestingly, overexpression of hypoxia inducible factor-1a (HIF-1a), which was under-expressed in iron overload models, reduced ROS levels and attenuated cell damage caused by iron overload in MDS/AML cells...
July 2017: Leukemia Research
https://www.readbyqxmd.com/read/28415624/hypoxia-inducible-factor-1a-induces-phenotype-switch-of-human-aortic-vascular-smooth-muscle-cell-through-pi3k-akt-aeg-1-signaling
#6
Kai Liu, Changcun Fang, Yuwen Shen, Zhengqin Liu, Min Zhang, Bingbing Ma, Xinyan Pang
To date, hypoxia-inducible factor 1a (HIF-1a) and astrocyte elevated gene-1 (AEG-1) have been involved in the proliferation, migration and morphological changes of vascular smooth muscle cells. However, the potential relationship of HIF-1a-AEG-1 pathway in human aortic smooth muscle cell (HASMC) has not been reported. In the present study, in-vitro assays were utilized to explore the potential impact of HIF-1a-AEG-1 signaling on HASMC phenotype. Here, we found that HIF-1a expression was up-regulated in the media of thoracic aortic dissection tissues as compared with normal aortic tissues, and was associated with increased apoptotic SMCs and decreased AEG-1 expression...
May 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28404981/characterization-of-the-transcriptional-and-metabolic-responses-of-pediatric-high-grade-gliomas-to-mtor-hif-1a-axis-inhibition
#7
Aurélia Nguyen, François Marie Moussallieh, Alan Mackay, A Ercument Cicek, Andres Coca, Marie Pierre Chenard, Noelle Weingertner, Benoit Lhermitte, Eric Letouzé, Eric Guérin, Erwan Pencreach, Sarah Jannier, Dominique Guenot, Izzie Jacques Namer, Chris Jones, Natacha Entz-Werlé
Pediatric high grade glioma (pHGGs), including sus-tentorial and diffuse intrinsic pontine gliomas, are known to have a very dismal prognosis. For instance, even an increased knowledge on molecular biology driving this brain tumor entity, there is no treatment able to cure those patients. Therefore, we were focusing on a translational pathway able to increase the cell resistance to treatment and to reprogram metabolically tumor cells, which are, then, adapting easily to a hypoxic microenvironment. To establish, the crucial role of the hypoxic pathways in pHGGs, we, first, assessed their protein and transcriptomic deregulations in a pediatric cohort of pHGGs and in pHGG's cell lines, cultured in both normoxic and hypoxic conditions...
March 23, 2017: Oncotarget
https://www.readbyqxmd.com/read/28367097/lyophilized-powder-of-catalpol-and-puerarin-protected-cerebral-vessels-from-ischemia-by-its-anti-apoptosis-on-endothelial-cells
#8
Yang Liu, Qing Tang, Siying Shao, Yi Chen, Weihai Chen, Xiaoyu Xu
Catalpol and puerarin are two monomers of Rehmannia glutinosa and Lobed Kudzuvine Root, which are two herbs commonly used together in ancient prescriptions of traditional Chinese medicine for cerebral ischemia. Our previous study shows that the lyophilized powder of the two monomers improved the outcome of cerebral ischemia excellently in rodents. However, if it protects vessels from ischemia is unknown. The present research studied the protection of lyophilized powder of catalpol and puerarin (CP) on endothelial cells and the relative mechanism in vivo and in vitro...
2017: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/28198519/correlation-of-hypoxia-inducible-transcription-factor-in-breast-cancer-and-suvmax-of-f-18-fdg-pet-ct
#9
COMPARATIVE STUDY
Young-Ju Jeong, Jae-Won Jung, Yoon-Young Cho, Sung-Hwan Park, Hoon-Kyu Oh, Sungmin Kang
BACKGROUND: Tumor hypoxia induces the expression of several genes via the hypoxia-inducible transcription factor-1 alpha (HIF-1a). It is associated with the prognosis of several cancers. We studied the immunohistochemical expression of HIF-1a in patients with invasive ductal cancer (IDC) of the breast and the possible correlation with the maximum standardized uptake value of the primary tumor (pSUVmax) as well as other biological parameters. Prognostic significance of pSUVmax and expression of HIF-1a for the prediction of progression-free survival (PFS) was also assessed...
2017: Nuclear Medicine Review. Central & Eastern Europe
https://www.readbyqxmd.com/read/28187214/what-s-the-remedy-for-the-distal-necrosis-of-diep-flap-better-venous-drain-or-more-arterial-supply
#10
Yi Zhang, Tingliang Wang, Jiao Wei, Jinguang He, Tao Wang, Ying Liu, Hua Xu, Jiasheng Dong
BACKGROUND: We developed a novel pedicled DIEP flap model in rat to explore the possible remedy for the distal necrosis of the flap. METHODS: A deep inferior epigastric perforator (DIEP) flap, based on the second right cranial perforator (P2) as the main pedicle, was elevated in 48 Sprague-Dawley rats. The rats were randomized into 4 groups: group I, the left P2 remaining intact as supercharging; group II, the left P2 artery alone kept as supercharging; group III, the left P2 vein alone kept as supercharging; group IV, no supercharging...
2017: PloS One
https://www.readbyqxmd.com/read/28181420/hypoxia-inducible-factor-1-a-urinary-biomarker-of-kidney-disease
#11
S Movafagh, D Raj, M Sanaei-Ardekani, D Bhatia, K Vo, M Mahmoudieh, R Rahman, E H Kim, A F Harralson
Identifying noninvasive biomarkers of kidney disease is valuable for diagnostic and therapeutic purposes. Hypoxia inducible factor 1 (HIF-1) expression is known to be elevated in the kidneys in several renal disease pathologies. We hypothesized that the urinary HIF-1a mRNA level may be a suitable biomarker for expression of this protein in chronic kidney disease (CKD). We compared HIF-1a mRNA levels from urine pellets of CKD and healthy subjects. To ensure that urinary HIF-1a mRNA is of kidney origin, we examined colocalization of HIF-1a mRNA with two kidney specific markers in urine cells...
May 2017: Clinical and Translational Science
https://www.readbyqxmd.com/read/28089775/degenerative-effects-of-cobalt-chloride-treatment-on-neurons-and-microglia-in-a-porcine-retina-organ-culture-model
#12
S Kuehn, J Hurst, F Rensinghoff, T Tsai, S Grauthoff, Y Satgunarajah, H B Dick, S Schnichels, S C Joachim
In order to understand the pathological processes of retinal diseases, experimental models are necessary. Cobalt, as part of the vitamin B12 complex, is important for neuronal integrity. However, it is known that high quantities of cobalt induce cytotoxic mechanisms via hypoxia mimicry. Therefore, we tested the degenerative effect of cobalt chloride (CoCl2) on neurons and microglia in a porcine retina organ culture model. Organotypic cultures of porcine retinas were cultured and treated with different concentrations of CoCl2 (0, 100, 300 and 500 μM) for 48 h...
February 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28060721/dppiv-promotes-endometrial-carcinoma-cell-proliferation-invasion-and-tumorigenesis
#13
Xiaoqing Yang, Xinhua Zhang, Rongrong Wu, Qicheng Huang, Yao Jiang, Jianbing Qin, Feng Yao, Guohua Jin, Yuquan Zhang
Dipeptidyl peptidase IV (DPPIV), also known as CD26, is a 110-kDa cell surface glycoprotein expressed in various tissues. DPPIV reportedly plays a direct role in the progression of several human malignancies. DPPIV specific inhibitors are employed as antidiabetics and could potentially be repurposed to enhance anti-tumor immunotherapies. In the present study, we investigated the correlation between DPPIV expression and tumor progression in endometrial carcinoma (EC). DPPIV overexpression altered cell morphology and stimulated cell proliferation, invasion and tumorigenesis in vitro and in vivo...
January 31, 2017: Oncotarget
https://www.readbyqxmd.com/read/28051265/the-role-of-hypoxia-inducible-factor-in-nasal-inflammations
#14
K-J Cheng, Y-Y Bao, S-H Zhou
OBJECTIVE: Hypoxia-inducible factor (HIF) is considered an important transcription factor due to its roles in glycolysis, angiogenesis, cell differentiation, apoptosis, and other cellular pathways. It takes the role in various physiological and pathological states, such as solid tumors, vascular injury, and atherosclerotic lesion progression. In recent studies, HIF is found as a master regulator of body inflammation and immunity, not only in hypoxia but also in normoxia. Nasal inflammation has a close relationship with anoxia...
December 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27986626/propofol-attenuates-pancreatic-cancer-malignant-potential-via-inhibition-of-nmda-receptor
#15
Xiangyuan Chen, Qichao Wu, Li You, Sisi Chen, Minmin Zhu, Changhong Miao
Propofol is a commonly used intravenous anesthetic, and could attenuate cancer cells malignant potential via inhibiting hypoxia-inducible factor-1α (HIF-1α) expression. However, the mechanism is still inclusive. In the present study, we mainly focus on the mechanism by which propofol down-regulated HIF-1α expression and malignant potential in pancreatic cancer cells. Human pancreatic cancer cells (Miapaca-2 and Panc-1) in vitro and murine pancreatic cancer cell (Panc02) in vivo were used to assess the effect of propofol on vascular endothelial growth factor (VEGF) expression and migration of pancreatic cancer cells...
January 15, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/27896629/remote-limb-ischemic-preconditioning-protects-rats-against-cerebral-ischemia-via-hif-1%C3%AE-ampk-hsp70-pathway
#16
Ming Xia, Qian Ding, Zhidan Zhang, Qinggen Feng
Remote limb ischemic preconditioning (RIPC) is a clinically feasible strategy to protect against ischemia/reperfusion injury, but the knowledge concerning the mechanism underlying RIPC is scarce. This study was performed to examine the effect of RIPC on brain tissue suffering from ischemia challenge and explore its underlying mechanism in a rat model. The animals were divided into four groups: Sham, middle cerebral artery occlusion (MCAO), RIPC, and MCAO+RIPC. We found that previous exposure to RIPC significantly attenuated neurological dysfunction and lessened brain edema in MCAO+RIPC group...
November 28, 2016: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/27869227/hypoxia-induced-vasculogenic-mimicry-formation-in-human-colorectal-cancer-cells-involvement-of-hif-1a-claudin-4-and-e-cadherin-and-vimentin
#17
Wen Li, ShaoQi Zong, Qi Shi, HongJia Li, Jian Xu, Fenggang Hou
Vasculogenic mimicry (VM) plays an important role in colorectal cancer (CRC) metastasis, and both hypoxia and the epithelial-mesenchymal transition (EMT) are necessary for VM. In this study, HIF-1α expression was upregulated in the VM-positive CRC cell line HCT-116 and thereby affected the expression of the EMT-related markers Claudin-4, E-cadherin (E-cd) and Vimentin(VIM). SB431542 and U0126EtOH, which can inhibit of EMT were used to treat HCT-116 and HCT-8 in these experiments. Both of the inhibitors had significant effect on EMT markers and the formations of VM in CRC cells...
November 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27780920/prognostic-value-of-plasma-levels-of-hif-1a-and-pgc-1a-in-breast-cancer
#18
Feng-Feng Cai, Cheng Xu, Xin Pan, Lu Cai, Xiao-Yan Lin, Su Chen, Ewelina Biskup
Cellular adaptive mechanisms are crucial for tumorigenesis and a common feature in solid tumor progression. Hypoxia-inducible factor-1α (HIF-1α) facilitates the biological response to hypoxia, advancing angiogenesis and metastatic potential of the tumor. The peroxisome proliferator-activated receptor γ coactivators 1α (PGC-1α) enhances mitochondrial biogenesis, favored by migratory/invasive cancer cells. We conducted a prospective, long-term follow up study to determine whether HIF-1α and PGC-1α can be implemented as predictive biomarker in breast cancer...
November 22, 2016: Oncotarget
https://www.readbyqxmd.com/read/27767192/novel-natural-product-like-caged-xanthones-bearing-a-carbamate-moiety-exhibit-antitumor-potency-and-anti-angiogenesis-activity-in-vivo
#19
Xiaoli Xu, Yue Wu, Mingyang Hu, Xiang Li, Qichao Bao, Jinlei Bian, Qidong You, Xiaojin Zhang
DDO-6101, a simplified structure obtained from the Garcinia natural product (NP) gambogic acid (GA), has been previously shown to possess high cytotoxicity to a variety of human tumour cell lines. To improve its physicochemical properties and in vivo cytotoxic potency, a series of novel carbamate-bearing derivatives based on DDO-6101 was synthesized and characterized. The structural modifications revealed that the presence of a carbamate moiety was useful for obtaining comparable cytotoxicity and improved aqueous solubility and permeability...
October 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27698266/houttuynia-cordata-thunb-promotes-activation-of-hif-1a-foxo3-and-mef2a-pathways-to-induce-apoptosis-in-human-hepg2-hepatocellular-carcinoma-cells
#20
Jung Min Kim, In-Hu Hwang, Ik-Soon Jang, Min Kim, In Seok Bang, Soo Jung Park, Yun-Jo Chung, Jong-Cheon Joo, Min-Goo Lee
Houttuynia cordata Thunb (H cordata), a medicinal plant, has anticancer activity, as it inhibits cell growth and induces cell apoptosis in cancer. However, the potential anti-cancer activity and mechanism of H cordata for human liver cancer cells is not well understood. Recently, we identified hypoxia-inducible factor (HIF)-1A, Forkhead box (FOX)O3, and MEF2A as proapoptotic factors induced by H cordata, suggesting that HIF-1A, FOXO3, and MEF2A contribute to the apoptosis of HepG2 hepatocellular carcinoma cells...
October 3, 2016: Integrative Cancer Therapies
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