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https://www.readbyqxmd.com/read/28315493/an-osteogenesis-angiogenesis-stimulation-artificial-ligament-for-anterior-cruciate-ligament-reconstruction
#1
Hong Li, Jinyan Li, Jia Jiang, Fang Lv, Jiang Chang, Shiyi Chen, Chengtie Wu
To solve the poor healing of polyethylene terephthalate (PET) artificial ligament in bone tunnel, copper-containing bioactive glass (Cu-BG) nanocoatings on PET artificial ligaments were successfully prepared by pulsed laser deposition (PLD). It was hypothesized that Cu-BG coated PET (Cu-BG/PET) grafts could enhance the in vitro osteogenic and angiogenic differentiation of rat bone marrow mesenchymal stem cells (rBMSCs) and in vivo graft-bone healing after anterior cruciate ligament (ACL) reconstruction in a goat model...
March 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28315292/hypoxic-culture-promotes-dopaminergic-neuronal-differentiation-of-nasal-olfactory-mucosa-mesenchymal-stem-cells-via-up-regulation-of-hypoxia-inducible-factor-1%C3%AE
#2
Yi Zhuo, Lei Wang, Lite Ge, Xuan Li, Ping Chen, Da Duan, Xiaohua Teng, Miao Jiang, Kai Liu, Ting Yuan, Pei Wu, Hao Wang, Yujia Deng, Huali Xie, Ying Xia, Ming Lu
<p><b>Background</b> Olfactory mucosa mesenchymal stem cells (OM-MSCs) display significant clonogenicactivity and may be easily propagated for Parkinson's disease therapies. Methods of inducing OM-MSCs to differentiate into dopaminergic (DAergic) neurons using olfactory ensheathing cells (OECs) is thus an attractive topic of research.</p><p><b>Methods</b> We designed a hypoxic-induction protocol to generate DAergic neurons from OM-MSCs using a physiological oxygen (O2) level of 3% and OEC-conditioned medium (HI group)...
March 17, 2017: Cell Transplantation
https://www.readbyqxmd.com/read/28302721/involvement-of-notch1-signaling-in-malignant-progression-of-a549-cells-subjected-to-prolonged-cadmium-exposure
#3
Kota Fujiki, Hisako Inamura, Takamitsu Miyayama, Masato Matsuoka
Cadmium exposure is known to increase lung cancer risk, but the underlying molecular mechanisms in cadmium-stimulated progression of malignancy are unclear. Here, we examined the effects of prolonged cadmium exposure on the malignant progression of A549 human lung adenocarcinoma cells and the roles of Notch1, hypoxia-inducible factor 1α (HIF-α), and insulin-like growth factor 1 receptor (IGF-1R)/Akt/extracellular signal-regulated kinase (ERK)/p70 S6 kinase 1 (S6K1) signaling pathways. Exposing A549 cells to 10 or 20 μM cadmium chloride (CdCl2) for 9-15 weeks induced a high proliferative potential, the epithelial-mesenchymal transition (EMT), stress fiber formation, high cell motility, and resistance to anti-tumor drugs...
March 16, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28277581/dietary-flavonoids-luteolin-and-quercetin-inhibit-invasion-of-cervical-cancer-by-reduction-of-ube2s-through-epithelial-mesenchymal-transition-signaling
#4
Tsung-Han Lin, Wen-Hsien Hsu, Pei-Hsun Tsai, Ying-Tang Huang, Cheng-Wei Lin, Ku-Chung Chen, Inn-Ho Tsai, Chithan C Kandaswami, Chang-Jen Huang, Geen-Dong Chang, Ming-Ting Lee, Chia-Hsiung Cheng
We previously reported that the dietary flavonoids, luteolin and quercetin, might inhibit the invasiveness of cervical cancer by reversing epithelial-mesenchymal transition (EMT) signaling. However, the regulatory mechanism exerted by luteolin and quercetin is still unclear. This study analyzed the invasiveness activation by ubiquitin E2S ligase (UBE2S) through EMT signaling and inhibition by luteolin and quercetin. We found that UBE2S expression was significantly higher in highly invasive A431 subgroup III (A431-III) than A431-parental (A431-P) cells...
March 9, 2017: Food & Function
https://www.readbyqxmd.com/read/28261334/twist1-enhances-hypoxia-induced-radioresistance-in-cervical-cancer-cells-by-promoting-nuclear-egfr-localization
#5
Hua Xiong, Xin Nie, Yanmei Zou, Chen Gong, Yang Li, Hua Wu, Hong Qiu, Lin Yang, Liang Zhuang, Peng Zhang, Jing Zhang, Yihua Wang, Huihua Xiong
Twist1 is a crucial transcription factor that regulates epithelial mesenchymal transition and involves in metastasis. Recent evidence suggests that Twist1 plays important role in hypoxia-induced radioresistance, but the underlying mechanism remains elusive. Here we investigated the change of Twist1 expression in human cervical squamous cancer cell line SiHa after hypoxia treatment. We also explored the role of Twist1 in radioresistance by manipulating the expression level of Twist1. We observed that hypoxia treatment elevated the expression of Twist1 in SiHa cells...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28249915/cobalt-chloride-induced-hypoxia-induces-epithelial-mesenchymal-transition-in-renal-carcinoma-cell-lines
#6
Ning Zhang, Baoan Hong, Changhua Zhou, Xin Du, Siqi Chen, Xiaohu Deng, Shayiremu Duoerkun, Qing Li, Yong Yang, Kan Gong
OBJECTIVE: To establish epithelial-mesenchymal transition (EMT) models in renal cell carcinoma (RCC) cell lines. MATERIALS AND METHODS: The RCC cell lines A498 and 786-O were used in the experiment and CoCl2 was used to simulate hypoxia. Cells were cultured with different concentrations of CoCl2. Morphology and changes in cytoactivity were observed. After CoCl2 treatment, the expression of HIF-1α and the changes of EMT-related molecules (E-cadherin, fibronectin) were detected...
January 2017: Annals of Clinical and Laboratory Science
https://www.readbyqxmd.com/read/28244640/mesenchymal-stem-cell-loaded-cardiac-patch-promotes-epicardial-activation-and-repair-of-the-infarcted-myocardium
#7
Qiang-Li Wang, Hai-Jie Wang, Zhi-Hua Li, Yong-Li Wang, Xue-Ping Wu, Yu-Zhen Tan
Cardiac patch is considered a promising strategy for enhancing stem cell therapy of myocardial infarction (MI). However, the underlying mechanisms for cardiac patch repairing infarcted myocardium remain unclear. In this study, we investigated the mechanisms of PCL/gelatin patch loaded with MSCs on activating endogenous cardiac repair. PCL/gelatin patch was fabricated by electrospun. The patch enhanced the survival of the seeded MSCs and their HIF-1α, Tβ4, VEGF and SDF-1 expression and decreased CXCL14 expression in hypoxic and serum-deprived conditions...
February 28, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28182306/effect-of-a-hypoxic-microenvironment-after-radiofrequency-ablation-on-residual-hepatocellular-cell-migration-and-invasion
#8
Yuyang Tong, Haiyun Yang, Xiaolin Xu, Jingliang Ruan, Ming Liang, Jiayi Wu, Baoming Luo
Clinical observations have shown that the boundary of tumor ablation is often less than safe border and that the use of radiofrequency ablation (RFA) in the treatment of hepatocellular carcinoma (HCC) may probably accelerate its recurrence and metastasis. RFA can cause the formation of a transition zone between normal liver tissues and necrotic coagulation, where blood stagnation and thrombosis expose residual cancer cells to a hypoxic microenvironment. As the blocked vessels are slowly reperfused, the oxygen supply is gradually restored...
February 9, 2017: Cancer Science
https://www.readbyqxmd.com/read/28167508/hypoxia-causes-down-regulation-of-dicer-in-hepatocellular-carcinoma-which-is-required-for-up-regulation-of-hypoxia-inducible-factor-1%C3%AE-and-epithelial-mesenchymal-transition
#9
Ahmed Atef Ibrahim, Christian Schmithals, Eric Kowarz, Verena Köberle, Bianca Kakoschky, Thomas Pleli, Otto Kollmar, Scarlett Nitsch, Oliver Waidmann, Fabian Finkelmeier, Stefan Zeuzem, Horst-Werner Korf, Tobias Schmid, Andreas Weigert, Bernd Kronenberger, Rolf Marschalek, Albrecht Piiper
PURPOSE: A role of Dicer, which converts precursor miRNAs to mature miRNAs, in the tumor-promoting effect of hypoxia is currently emerging in some tumor entities. Its role in hepatocellular carcinoma (HCC) is unknown. EXPERIMENTAL DESIGN: HepG2 and Huh-7 cells were stably transfected with an inducible Dicer expression vector and were exposed to hypoxia/normoxia. HepG2-Dicer xenografts were established in nude mice; hypoxic areas and Dicer were detected in HCC xenografts and HCCs from mice with endogenous hepatocarcinogenesis; epithelial mesenchymal transition (EMT) markers were analyzed by immunohistochemistry or by immunoblotting...
February 6, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28165799/the-balance-between-proliferation-and-transcription-of-angiogenic-factors-of-mesenchymal-stem-cells-in-hypoxia
#10
Arina T Buizer, Sjoerd K Bulstra, Albert G Veldhuizen, Roel Kuijer
Bridging large bone defects with mesenchymal stromal cells-seeded scaffolds remains a big challenge in orthopedic surgery, due to the lack of vascularization. Within such a cell-scaffold construct cells are exposed to ischemic conditions. When human mesenchymal stem cells (hMSCs) encounter hypoxic conditions, they show higher cell proliferation than at ambient oxygen levels. However, when hMSCs are exposed to prolonged ischemia, cell proliferation ceases completely. Exposure of hMSCs to hypoxic conditions is known to result in the transcription of angiogenic factors (AGF), which can promote the development of a new blood vessels...
February 6, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/28153790/hif-2-dependent-expression-of-stem-cell-factor-promotes-metastasis-in-hepatocellular-carcinoma
#11
Xiuchao Wang, Jie Dong, Li Jia, Tiansuo Zhao, Mingxiao Lang, Zengxun Li, Chungen Lan, Xin Li, Jihui Hao, Hongwei Wang, Tai Qin, Chongbiao Huang, Shengyu Yang, Ming Yu, He Ren
Stem cell factor (SCF) is a multifunctional cytokine responsible for tumorigenesis and progression. In this study, we report that increased expression of SCF in hepatocellular carcinoma (HCC) patients is highly associated with metastasis and poor prognosis. SCF inhibition with RNAi inhibited HCC cell migration, invasion in vitro, and reduced intrahepatic metastases burden and significantly prolonged survival in a HCC xeograft mouse model. SCF depletion in HCC xeograft decreased the expression of vimentin and increase the expression of E-cadherin, implicating a role for SCF in epithelial-mesenchymal transition...
January 30, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28137309/induction-of-metastasis-cancer-stem-cell-phenotype-and-oncogenic-metabolism-in-cancer-cells-by-ionizing-radiation
#12
REVIEW
Su Yeon Lee, Eui Kyong Jeong, Min Kyung Ju, Hyun Min Jeon, Min Young Kim, Cho Hee Kim, Hye Gyeong Park, Song Iy Han, Ho Sung Kang
Radiation therapy is one of the major tools of cancer treatment, and is widely used for a variety of malignant tumours. Radiotherapy causes DNA damage directly by ionization or indirectly via the generation of reactive oxygen species (ROS), thereby destroying cancer cells. However, ionizing radiation (IR) paradoxically promotes metastasis and invasion of cancer cells by inducing the epithelial-mesenchymal transition (EMT). Metastasis is a major obstacle to successful cancer therapy, and is closely linked to the rates of morbidity and mortality of many cancers...
January 30, 2017: Molecular Cancer
https://www.readbyqxmd.com/read/28101243/mir-199a-5p-regulates-hif-1%C3%AE-and-osgin2-and-its-expression-is-correlated-to-soft-tissue-sarcoma-patients-outcome
#13
Jacqueline Keßler, Swetlana Rot, Matthias Bache, Matthias Kappler, Peter Würl, Dirk Vordermark, Helge Taubert, Thomas Greither
Soft tissue sarcomas are a heterogeneous group of malignant neoplasms of mesenchymal origin. Partly due to hypoxia, an aggressive and radioresistant phenotype frequently develops, resulting in poorer patient outcome. microRNAs (miRNAs) are tiny, non-coding regulators of gene expression and in situations of cellular stress situations may predict clinical progression and patient outcome. In the present study, hypoxia-associated miR-199a-5p expression in 96 soft tissue sarcoma samples was analysed by reverse transcription-quantitative polymerase chain reaction and associations between miR-199a-5p expression and patient clinicopathological characteristics and survival were measured...
December 2016: Oncology Letters
https://www.readbyqxmd.com/read/28089517/hypoxia-induces-a-hif-1-dependent-transition-from-collective-to-amoeboid-dissemination-in-epithelial-cancer-cells
#14
Steffi Lehmann, Veronika Te Boekhorst, Julia Odenthal, Roberta Bianchi, Sjoerd van Helvert, Kristian Ikenberg, Olga Ilina, Szymon Stoma, Jael Xandry, Liying Jiang, Reidar Grenman, Markus Rudin, Peter Friedl
Cancer metastases arise from a multi-step process that requires metastasizing tumor cells to adapt to signaling input from varying tissue environments [1]. As an early metastatic event, cancer cell dissemination occurs through different migration programs, including multicellular, collective, and single-cell mesenchymal or amoeboid migration [2-4]. Migration modes can interconvert based on changes in cell adhesion, cytoskeletal mechanotransduction [5], and/or proteolysis [6], most likely under the control of transcriptional programs such as the epithelial-to-mesenchymal transition (EMT) [7, 8]...
February 6, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28088787/hint2-downregulation-promotes-colorectal-carcinoma-migration-and-metastasis
#15
Weihua Li, Shaoxin Cai, Le Wang, Changshun Yang, Biaohuan Zhou, Huan Wang
Histidine triad nucleotide-binding 2 (HINT2), a member of the histidine triad proteins family, sensitizes cells to apoptosis in hepatocellular carcinoma. Here, we showed that HINT2 expression is lower in primary colorectal cancer (CRC) and metastasis tissues than in normal colorectal tissues, and that HINT2 abundance is inversely correlated with CRC tumor stage. Treating CRC cells with 5-aza-2'-deoxycytidine, a demethylating agent, upregulated HINT2, suggesting HINT2 downregulation is caused by methylation of the gene promoter...
January 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28079892/hif-2%C3%AE-and-oct4-have-synergistic-effects-on-survival-and-myocardial-repair-of-very-small-embryonic-like-mesenchymal-stem-cells-in-infarcted-hearts
#16
Shaoheng Zhang, Lan Zhao, Jiahong Wang, Nannan Chen, Jian Yan, Xin Pan
Poor cell survival and limited functional benefits have restricted mesenchymal stem cell (MSC) efficacy for treating myocardial infarction (MI), suggesting that a better understanding of stem cell biology is needed. The transcription factor HIF-2α is an essential regulator of the transcriptional response to hypoxia, which can interact with embryonic stem cells (ESCs) transcription factor Oct4 and modulate its signaling. Here, we obtained very small embryonic-like mesenchymal stem cells (vselMSCs) from MI patients, which possessed the very small embryonic-like stem cells' (VSELs) morphology as well as ESCs' pluripotency...
January 12, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28077595/long-non-coding-rna-linc00152-promotes-gallbladder-cancer-metastasis-and-epithelial-mesenchymal-transition-by-regulating-hif-1%C3%AE-via-mir-138
#17
Qiang Cai, Zhenqiang Wang, Shouhua Wang, Mingzhe Weng, Di Zhou, Chen Li, Jiandong Wang, Erzhen Chen, Zhiwei Quan
Long non-coding RNA LINC00152 had been reported as an oncogene in gastric and hepatocellular cancer. In this study, we show that LINC00152 is overexpressed in gallbladder cancer (GBC) tissue samples and cell lines. The high LINC00152 levels correlated negatively with the overall survival time in GBC patients. Functionally, LINC00152 dramatically promoted cell migration, invasion and epithelial-mesenchymal transition (EMT) progression in vitro. In vivo, LINC00152 overexpression significantly promoted tumour peritoneal spreading and metastasis...
January 2017: Open Biology
https://www.readbyqxmd.com/read/28076840/hif-1%C3%AE-induces-the-epithelial-mesenchymal-transition-in-gastric-cancer-stem-cells-through-the-snail-pathway
#18
Shi-Wei Yang, Zhi-Gang Zhang, Ying-Xue Hao, Yong-Liang Zhao, Feng Qian, Yan Shi, Ping-Ang Li, Chun-Yang Liu, Pei-Wu Yu
Substantial evidence suggests that the epithelial-mesenchymal transition (EMT) phenotype is associated with the invasive characteristics of cancer stem cells (CSCs),which possess an EMT phenotype that may predominate in tumor invasion and metastasis. However, the mechanisms for the generation and regulation of these CSCs have not been clearly defined. As hypoxia and EMT-related factors may have important functions in EMT-like CSCs, the aim of this study was to investigate the effects of hypoxia on these cells...
February 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28070036/-hypoxic-condition-promotes-olfactory-mucosa-mesenchymal-stem-cells-to-differentiate-into-neurons-and-%C3%A2-underlying-mechanisms
#19
Yi Zhuo, Ting Yuan, Da Duan, Lei Wang, Lite Ge, Pei Wu, Hao Wang, Ming Lu
To explore whether hypoxic condition could promote the olfactory mucosa mesenchymal stem cells (OM-MSCs) to differentiate into neurons with the olfactory ensheathing cells (OECs) supernatant and the potential mechanisms.
 Methods: The OM-MSCs and OECs were isolated and cultured, and they were identified by flow cytometry and immunofluorescence. The OM-MSCs were divided into three groups: a 3%O2+ HIF-1α inhibitors (lificiguat: YC-1) + OECs supernatant group (Group A) , a 3%O2 + OECs supernatant group (Group B) and a 21%O2 + OECs supernatant group (Control group)...
December 28, 2016: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28069592/mir-142-modulates-human-pancreatic-cancer-proliferation-and-invasion-by-targeting-hypoxia-inducible-factor-1-hif-1%C3%AE-in-the-tumor-microenvironments
#20
Yebin Lu, Niandong Ji, Wei Wei, Weijia Sun, Xuejun Gong, Xitao Wang
MicroRNAs regulate most protein-coding genes, including genes important in cancer and other diseases. In this study, we demonstrated that the expression of miR-142 could be significantly suppressed in pancreatic cancer specimens and cell lines compared to their adjacent tissues and normal pancreatic cells. Growth and invasion of PANC-1 and SW1990 cells were attenuated by overexpression of miR-142 in vitro With the help of bioinformatics analysis, hypoxia-inducible factor 1 (HIF-1α) was identified to be a direct target of miR-142, and a luciferase reporter experiment confirmed this discovery...
February 15, 2017: Biology Open
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