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https://www.readbyqxmd.com/read/27915020/multifunctions-of-dual-zn-mg-ion-co-implanted-titanium-on-osteogenesis-angiogenesis-and-bacteria-inhibition-for-dental-implants
#1
Yiqiang Yu, Guodong Jin, Yang Xue, Donghui Wang, Xuanyong Liu, Jiao Sun
In order to improve the osseointegration and long-term survival of dental implants, it is urgent to develop a multifunctional titanium surface which would simultaneously have osteogeneic, angiogeneic and antibacterial properties. In this study, a potential dental implant material-dual Zn/Mg ion co-implanted titanium (Zn/Mg-PIII) was developed via plasma immersion ion implantation (PIII). The Zn/Mg-PIII surfaces were found to promote initial adhesion and spreading of rat bone marrow mesenchymal stem cells (rBMSCs) via the upregulation of the gene expression of integrin α1 and integrin β1...
November 30, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27903985/the-tissue-inhibitor-of-metalloproteinases-1-timp-1-promotes-survival-and-migration-of-acute-myeloid-leukemia-cells-through-cd63-pi3k-akt-p21-signaling
#2
Dorian Forte, Valentina Salvestrini, Giulia Corradi, Lara Rossi, Lucia Catani, Roberto M Lemoli, Michele Cavo, Antonio Curti
We and others have shown that the Tissue Inhibitor of Metalloproteinases-1 (TIMP-1), a member of the inflammatory network exerting pleiotropic effects in the bone marrow (BM) microenvironment, regulates the survival and proliferation of different cell types, including normal hematopoietic progenitor cells. Moreover, TIMP-1 has been shown to be involved in cancer progression. However, its role in leukemic microenvironment has not been addressed. Here, we investigated the activity of TIMP-1 on Acute Myelogenous Leukemia (AML) cell functions...
November 26, 2016: Oncotarget
https://www.readbyqxmd.com/read/27882083/dimethyloxaloylglycine-increases-bone-repair-capacity-of-adipose-derived-stem-cells-in-the-treatment-of-osteonecrosis-of-the-femoral-head
#3
Zhen-Hong Zhu, Wen-Qi Song, Chang-Qing Zhang, Ji-Min Yin
Mesenchymal stem cells have been widely studied to promote local bone regeneration of osteonecrosis of the femoral head (ONFH). Previous studies observed that dimethyloxaloylglycine (DMOG) enhanced the angiogenic and osteogenic activity of mesenchymal stem cells by activating the expression of hypoxia inducible factor-1α (HIF-1α), thereby improving the bone repair capacity of mesenchymal stem cells. In the present study, it was investigated whether DMOG could increase the bone repair capacity of adipose-derived stem cells (ASCs) in the treatment of ONFH...
November 2016: Experimental and Therapeutic Medicine
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
#4
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/27866977/the-anti-hyperplasia-anti-oxidative-and-anti-inflammatory-properties-of-qing-ye-dan-and-swertiamarin-in-testosterone-induced-benign-prostatic-hyperplasia-in-rats
#5
Xinying Wu, Ye Gu, Lun Li
Qing Ye Dan (QYD) is the whole plant of Swertia mileensis and used in Chinese folk medicine for the treatment of prostatitis, benign prostatic hyperplasia (BPH) and so on. This study was to investigate the effects of QYD and its main component swertiamarin on BPH induced by testosterone in rats. The prostatic expressions of vascular endothelial growth factor (VEGF), epidermal growth factor (EGF), basic fibroblast growth factor (βFGF) and proliferating cell nuclear antigen (PCNA) were detected by immunohistochemistry assay...
November 17, 2016: Toxicology Letters
https://www.readbyqxmd.com/read/27862498/all-trans-retinoic-acid-preconditioning-enhances-proliferation-angiogenesis-and-migration-of-mesenchymal-stem-cell-in-vitro-and-enhances-wound-repair-in-vivo
#6
M Pourjafar, M Saidijam, K Mansouri, H Ghasemibasir, F Karimi Dermani, R Najafi
OBJECTIVES: Stem cell therapy is considered to be a suitable alternative in treatment of a number of diseases. However, there are challenges in their clinical application in cell therapy, such as to reduce survival and loss of transplanted stem cells. It seems that chemical and pharmacological preconditioning enhances their therapeutic efficacy. In this study, we investigated effects of all-trans retinoic acid (ATRA) on survival, angiogenesis and migration of mesenchymal stem cells (MSCs) in vitro and in a wound-healing model...
November 10, 2016: Cell Proliferation
https://www.readbyqxmd.com/read/27855169/notch2-signaling-regulates-the-proliferation-of-murine-bone-marrow-derived-mesenchymal-stem-stromal-cells-via-c-myc-expression
#7
Yukio Sato, Yo Mabuchi, Kenichi Miyamoto, Daisuke Araki, Kunimichi Niibe, Diarmaid D Houlihan, Satoru Morikawa, Taneaki Nakagawa, Toshihiro Nakajima, Chihiro Akazawa, Shingo Hori, Hideyuki Okano, Yumi Matsuzaki
Mesenchymal stem/stromal cells (MSCs) reside in the bone marrow and maintain their stemness under hypoxic conditions. However, the mechanism underlying the effects of hypoxia on MSCs remains to be elucidated. This study attempted to uncover the signaling pathway of MSC proliferation. Under low-oxygen culture conditions, MSCs maintained their proliferation and differentiation abilities for a long term. The Notch2 receptor was up-regulated in MSCs under hypoxic conditions. Notch2-knockdown (Notch2-KD) MSCs lost their cellular proliferation ability and showed reduced gene expression of hypoxia-inducible transcription factor (HIF)-1α, HIF-2α, and c-Myc...
2016: PloS One
https://www.readbyqxmd.com/read/27830734/vegf-released-by-deferoxamine-preconditioned-mesenchymal-stem-cells-seeded-on-collagen-gag-substrates-enhances-neovascularization
#8
Elizabeth A Wahl, Thilo L Schenck, Hans-Günther Machens, Elizabeth R Balmayor
Hypoxia preconditioning of mesenchymal stem cells (MSCs) has been shown to promote wound healing through HIF-1α stabilization. Preconditioned MSCs can be applied to three-dimensional biomaterials to further enhance the regenerative properties. While environmentally induced hypoxia has proven difficult in clinical settings, this study compares the wound healing capabilities of adipose derived (Ad) MSCs seeded on a collagen-glycosaminoglycan (GAG) dermal substrate exposed to either environmental hypoxia or FDA approved deferoxamine mesylate (DFO) to stabilize HIF-1α for wound healing...
November 10, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27830012/human-mesenchymal-stromal-cell-derived-extracellular-vesicles-alleviate-renal-ischemic-reperfusion-injury-and-enhance-angiogenesis-in-rats
#9
Xiangyu Zou, Di Gu, Xiaoyu Xing, Zhongliang Cheng, Dongliang Gong, Guangyuan Zhang, Yingjian Zhu
BACKGROUND: Mesenchymal stromal cells (MSCs) derived extracellular vesicles (EVs) were regarded as a potent medium for kidney injury repair and angiogenesis were regarded as an important step in tissue regeneration. However, the pro-angiogenesis effect of MSC-EVs in ischemia-reperfusion induced kidney injury and its potential mechanisms have yet to be determined. METHODS: EVs were isolated from the medium of human umbilical cord-derived MSCs (huMSCs) were injected in rats intravenously after unilateral kidney ischemia...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27826618/valproic-acid-inhibits-irradiation-induced-epithelial-mesenchymal-transition-and-stem-cell-like-characteristics-in-esophageal-squamous-cell-carcinoma
#10
Ayako Kanamoto, Itasu Ninomiya, Shinichi Harada, Tomoya Tsukada, Koichi Okamoto, Shinichi Nakanuma, Seisho Sakai, Isamu Makino, Jun Kinoshita, Hironori Hayashi, Katsunobu Oyama, Tomoharu Miyashita, Hidehiro Tajima, Hiroyuki Takamura, Sachio Fushida, Tetsuo Ohta
Esophageal carcinoma is one of the most aggressive malignancies, and is characterized by poor response to current therapy and a dismal survival rate. In this study we investigated whether irradiation induces epithelial-mesenchymal transition (EMT) in esophageal squamous cell carcinoma (ESCC) TE9 cells and whether the classic histone deacetylase (HDAC) inhibitor valproic acid (VPA) suppresses these changes. First, we showed that 2 Gy irradiation induced spindle cell-like morphologic changes, decreased expression of membranous E-cadherin, upregulated vimentin expression, and altered the localization of β-catenin from its usual membrane-bound location to cytoplasm in TE9 cells...
November 2016: International Journal of Oncology
https://www.readbyqxmd.com/read/27806701/yi-ai-fang-a-traditional-chinese-herbal-formula-impacts-the-vasculogenic-mimicry-formation-of-human-colorectal-cancer-through-hif-1%C3%AE-and-epithelial-mesenchymal-transition
#11
Fenggang Hou, Wen Li, Qi Shi, Hongjia Li, Shanshan Liu, Shaoqi Zong, Jianlin Ren, Jie Chai, Jian Xu
BACKGROUND: Yi Ai Fang (YAF), a traditional Chinese medicine (TCM) formula, has been identified to have anticancer activity in our previously studies. The present study aimed to explore the potential mechanism of YAF suppression of VM on colorectal cancer (CRC) in vitro and in vivo. METHODS: Cell viability was measured by CCK-8 assay. HIF-1α, E-cd(E-cadherin), Claudin-4, and VIM (Vimentin) expressions level in vitro were evaluated by Western blot or RT-PCR. In addition, Human CRC HCT-116 cells were implanted in BALB/c nude mice; mice with xenografted tumors were randomly administrated vehicle (control), 8, 16, or 32 mg/mL YAF, or 1 mg/mL fluorouracil (5-FU)...
November 2, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27783707/pluripotent-and-multipotent-stem-cells-display-distinct-hypoxic-mirna-expression-profiles
#12
Rahul Agrawal, Tina P Dale, Mohammed A Al-Zubaidi, Prit Benny Malgulwar, Nicholas R Forsyth, Ritu Kulshreshtha
MicroRNAs are reported to have a crucial role in the regulation of self-renewal and differentiation of stem cells. Hypoxia has been identified as a key biophysical element of the stem cell culture milieu however, the link between hypoxia and miRNA expression in stem cells remains poorly understood. We therefore explored miRNA expression in hypoxic human embryonic and mesenchymal stem cells (hESCs and hMSCs). A total of 50 and 76 miRNAs were differentially regulated by hypoxia (2% O2) in hESCs and hMSCs, respectively, with a negligible overlap of only three miRNAs...
2016: PloS One
https://www.readbyqxmd.com/read/27765951/hypoxia-inducible-factor-2-alpha-promotes-the-proliferation-of-human-placenta-derived-mesenchymal-stem-cells-through-the-mapk-erk-signaling-pathway
#13
Chengxing Zhu, Jiong Yu, Qiaoling Pan, Jinfeng Yang, Guangshu Hao, Yingjie Wang, Lanjuan Li, Hongcui Cao
Human placenta-derived mesenchymal stem cells (hPMSCs) reside in a physiologically low-oxygen microenvironment. Hypoxia influences a variety of stem cell cellular activities, frequently involving hypoxia-inducible factor-2 alpha (HIF-2α). This research showed that hPMSCs cultured in hypoxic conditions (5% O2) exhibited a more naïve morphology and had a higher proliferative capability and higher HIF-2α expression than hPMSCs cultured in normoxic conditions (21% O2). Similar to the hypoxic cultures, hPMSCs over-expressing HIF-2α showed higher proliferative potential and higher expression of CCND1 (CyclinD1), MYC (c-Myc), POU5F1 (Oct4) and the components of the MAPK/ERK pathway...
October 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27758863/mesenchymal-stromal-cell-derived-extracellular-vesicles-promote-myeloid-biased-multipotent-hematopoietic-progenitor-expansion-via-toll-like-receptor-engagement
#14
Natalya A Goloviznina, Santhosh Chakkaramakkil Verghese, Young Me Yoon, Oleh Taratula, Daniel L Marks, Peter Kurre
Mesenchymal stromal cells (MSC) present in the bone marrow (BM) microenvironment secrete cytokines and angiogenic factors that support the maintenance and regenerative expansion of hematopoietic stem and progenitor cells (HSPC). Here, we tested the hypothesis that extracellular vesicles (EVs) released by MSC contribute to the paracrine crosstalk that shapes hematopoietic function. We systematically characterized EV release by murine stromal cells and demonstrate that MSC-derived EVs prompt a loss of HSPC quiescence with concomitant expansion of murine myeloid progenitors...
October 7, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27697531/pmepa1-a-tgf-%C3%AE-and-hypoxia-inducible-gene-that-participates-in-hypoxic-gene-expression-networks-in-solid-tumors
#15
Masaru Koido, Junko Sakurai, Satomi Tsukahara, Yuri Tani, Akihiro Tomida
Prostate transmembrane protein, androgen induced 1 (PMEPA1) is highly expressed in various solid tumors and is known to play important roles in the transforming growth factor-β (TGF-β) signaling pathway. Here, we demonstrate a novel relationship between PMEPA1 and hypoxia, a common microenvironmental stress condition in solid tumors. We showed that induction of PMEPA1 expression occurred during hypoxia in a manner dependent on both TGF-β signaling and hypoxia-inducible factor-1 (HIF-1) pathways. Furthermore, overexpression and knockdown experiments revealed that PMEPA1 enhanced HIF-1 transcription activity...
October 28, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27693633/hypoxia-induces-twist-activated-epithelial-mesenchymal-transition-and-proliferation-of-pancreatic-cancer-cells-in%C3%A2-vitro-and-in-nude-mice
#16
Shi Chen, Jiang-Zhi Chen, Jia-Qiang Zhang, Hui-Xin Chen, Mao-Lin Yan, Long Huang, Yi-Feng Tian, Yan-Lin Chen, Yao-Dong Wang
The epithelial-mesenchymal transition (EMT) plays a crucial role in pancreatic ductal adenocarcinoma (PDAC) development and progression. TWIST activated by intra-tumoral hypoxia functions to promote the EMT. We hypothesized that TWIST and the downstream gene pathway could mediate PDAC progression under hypoxia. Therefore, 90 PDAC tissue specimens were immunostained for TWIST and other proteins. Pancreatic cancer cell lines were used for in vitro experiments and nude mice were used to confirm the in vivo data...
September 28, 2016: Cancer Letters
https://www.readbyqxmd.com/read/27627895/promigratory-and-proangiogenic-effects-of-adiporon-on-bone-marrow-derived-mesenchymal-stem-cells-an-in-vitro-study
#17
Sara Malih, Massoud Saidijam, Kamran Mansouri, Mona Pourjafar, Maryam Sadat Tafakh, Fahimeh Talebzadeh, Rezvan Najafi
OBJECTIVES: To investigate the effect of AdipoRon on major factors involved in survival, migration and neovascularization of rat bone marrow-derived mesenchymal stem cells. RESULTS: AdipoRon promoted the MSCs viability. Real-time PCR indicated that the expression of cyclooxygenase-2 (COX-2), hypoxia-inducible factor-1 (HIF-1) C-X-C chemokine receptor type 4 (CXCR4), C-C chemokine receptor type 2 (CCR2), vascular endothelial growth factor matrix metalloproteinase-2 (MMP-2) and MMP-9 were upregulated in AdipoRon-treated MSCs compared to control groups...
September 15, 2016: Biotechnology Letters
https://www.readbyqxmd.com/read/27616187/osteoarthritis-from-pathogenic-mechanisms-and-recent-clinical-developments-to-novel-prospective-therapeutic-options
#18
Claire Vinatier, Christophe Merceron, Jerome Guicheux
Osteoarthritis (OA) is a degenerative joint disease that, despite recent progress, has no curative treatment. Considerable research has recently been initiated to identify new potential therapeutic targets. In this review, we will set forth some of the major discoveries in the past 5 years, notably those dealing with the identification of pathogenic factors [hypoxia-inducible factors (HIFs), complement, transforming growth factor (TGF)-β and zinc-ZIP8]. New drugs and concepts currently in clinical development [anti-nerve growth factor (NGF), mesenchymal stromal cells and fibroblast growth factor (FGF)-18] will then be addressed...
September 8, 2016: Drug Discovery Today
https://www.readbyqxmd.com/read/27614812/hypoxia-induced-epithelial-mesenchymal-transition-is-regulated-by-phosphorylation-of-gsk3-%C3%AE-via-pi3-k-akt-signaling-in-oral-squamous-cell-carcinoma
#19
Takeshi Kaneko, Hironari Dehari, Takanori Sasaki, Tomohiro Igarashi, Kazuhiro Ogi, Jun-Ya Okamoto, Mayumi Kawata, Jun-Ichi Kobayashi, Akihiro Miyazaki, Kenji Nakamori, Hiroyoshi Hiratsuka
OBJECTIVE: Epithelial-mesenchymal transition (EMT) plays an important role in cancer invasion and metastasis induced by hypoxia. Here, we examined whether phosphorylation of GSK3-β via phosphoinositide 3-kinase (PI3 K)/Akt signaling is involved in enhancing the hypoxia-induced EMT in oral squamous cell carcinoma (OSCC). STUDY DESIGN: Experiments were performed in OSCC cell lines (HSC-2, HSC-3, HSC-4, SAS, and HO-1-U-1) under normoxic or hypoxic conditions. The EMT was assessed by Matrigel invasion assays and wound healing assays...
June 22, 2016: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/27600018/-role-of-hif-induced-emt-in-invasion-and%C3%A2-metastasis-of-tumor
#20
Yang Chen, Yan Shi, Guanghai Dai
Hypoxia plays a vital role in tumor metabolism, proliferation, apoptosis, invasion and metastasis via hypoxia-inducible factor (HIF). Epithelial to mesenchymal transition (EMT) is a crucial process to metastasis, which could be triggered by hypoxia. EMT could be regulated by HIF via multiple pathways including TGF-β, Notch, and Wnt/β-catenin. It has been shown that anti-HIF drugs combined with anti-EMT therapies could be a promising strategy for tumor therapy.
August 2016: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
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