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https://www.readbyqxmd.com/read/28723624/lncrna-ancr-down-regulation-promotes-tgf-%C3%AE-induced-emt-and-metastasis-in-breast-cancer
#1
Zhongwei Li, Meichen Dong, Dongmei Fan, Pingfu Hou, Hongyuan Li, Lingxia Liu, Cong Lin, Jiwei Liu, Liangping Su, Lan Wu, Xiaoxue Li, Baiqu Huang, Jun Lu, Yu Zhang
Epithelial to mesenchymal transition (EMT) is a progression of cellular plasticity critical for development, differentiation, cancer cells migration and tumor metastasis. As a well-studied factor, TGF-β participates in EMT and involves in physiological and pathological functions of tumor progression. Accumulating evidence indicates that long noncoding RNAs(lncRNAs) play crucial roles in EMT and tumor metastasis. Here, we find that lncRNA ANCR participates in TGF-β1-induced EMT. By our ChIP and Real-time PCR assays, we reveal that TGF-β1 down-regulates ANCR expression by increasing HDAC3 enrichment at ANCR promoter region, which decreases both H3 and H4 acetylation of ANCR promoter...
June 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28722162/cyanidin-suppresses-autophagic-activity-regulating-chondrocyte-hypertrophic-differentiation
#2
Zhen Cao, Song Huang, Ce Dou, Qiang Xiang, Shiwu Dong
Cartilage is a kind of special connective tissue which does not contain neither blood vessels nor lymphatics and nerves. Therefore, the damage in cartilage is difficult to be repaired spontaneously. Constructing tissue engineered cartilage provides a new technique for cartilage repairing. Mesenchymal stem cells (MSCs) possess a unique capability of self-renew and can differentiate into pre-chondrocytes which are frequently applied as seed cells in tissue engineering. However, in regenerated cartilage the chondrocytes derived from MSCs can hardly maintain homeostasis and preferentially present hypertrophic like phenotype...
July 19, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28722044/tripartite-polyionic-complex-pic-micelles-as-non-viral-vectors-for-mesenchymal-stem-cell-sirna-transfection
#3
Sophie Raisin, Marie Morille, Claire Bony, Danièle Noël, Jean-Marie Devoisselle, Emmanuel Belamie
In the context of regenerative medicine, the use of RNA interference mechanisms has already proven its efficiency in targeting specific gene expression with the aim of enhancing, accelerating or, more generally, directing stem cell differentiation. However, achievement of good transfection levels requires the use of a gene vector. For in vivo applications, synthetic vectors are an interesting option to avoid possible issues associated with viral vectors (safety, production costs, etc.). Herein, we report on the design of tripartite polyionic complex micelles as original non-viral polymeric vectors suited for mesenchymal stem cell transfection with siRNA...
July 19, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28715156/neutrophil-mediated-enhancement-of-angiogenesis-and-osteogenesis-in-a-novel-triple-cell-co-culture-model-with-endothelial-cells-and-osteoblasts
#4
T D K Herath, Anis Larbi, Swee Hin Teoh, C James Kirkpatrick, Bee Tin Goh
Repair and regeneration of critical-sized bone defects remain a major challenge in orthopaedic and craniomaxillofacial surgery. Until now, attempts to bioengineer bone tissue have been hindered by the inability to establish proper angiogenesis and osteogenesis in the tissue construct. In the present study, we established a novel triple cell co-culture model consisting of osteoblasts, endothelial cells, and neutrophils and conducted a systematic investigation of the effects of neutrophils on angiogenesis and osteogenesis...
July 17, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28715096/effect-of-avulsion-storage-media-on-periodontal-ligament-fibroblast-differentiation
#5
İrem Bağ, Sibel Yildirim
BACKGROUND/AIM: An avulsed tooth must be stored in a solution which maintains periodontal ligament (PDL) cell viability. The aim of this study was to compare the effects of Hank's Balanced Salt Solution (HBSS) and milk on the differentiation of PDL fibroblasts. MATERIAL AND METHODS: Eighteen extracted third molars, (n = 3 for each group), were immersed in HBSS, milk, and Dulbecco's Modified Eagle Medium-Ham's F12 (DMEM-F12) at 4 °C for 30-60 min or 12 h. The growth dynamics of PDL fibroblasts were evaluated with cell proliferation graphics and population doubling time (PDT) values...
July 17, 2017: Dental Traumatology: Official Publication of International Association for Dental Traumatology
https://www.readbyqxmd.com/read/28713020/pneumolysin-induced-autophagy-contributes-to-inhibition-of-osteoblast-differentiation-through-downregulation-of-sp1-in-human-osteosarcoma-cells
#6
Jinwook Kim, Hee-Weon Lee, Dong Kwon Rhee, James C Paton, Suhkneung Pyo
BACKGROUND INFORMATION: The 53kDa protein pneumolysin (PLY) is the main virulence factor of Streptococcus pneumoniae, a leading cause of invasive pneumococcal diseases. PLY forms pores in cholesterol-containing membranes, thereby interfering with the function of cells. Bone destruction is a serious matter in chronic inflammatory diseases such as septic arthritis and osteomyelitis. S. pneumoniae is increasingly being recognized as a common cause of septic arthritis, but its pathogenesis is poorly defined...
July 13, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28711659/exercise-initiated-after-the-onset-of-insulin-resistance-improves-trabecular-microarchitecture-and-cortical-bone-biomechanics-of-the-tibia-in-hyperphagic-otsuka-long-evans-tokushima-fatty-rats
#7
Laura C Ortinau, Melissa A Linden, Rebecca K Dirkes, R Scott Rector, Pamela S Hinton
The present study extends our previous findings that exercise, which prevents the onset of insulin resistance and type 2 diabetes (T2D), also prevents the detrimental effects of T2D on whole-bone and tissue-level strength. Our objective was to determine whether exercise improves bone's structural and material properties if insulin resistance is already present in the Otsuka Long-Evans Tokushima Fatty (OLETF) rat. The OLETF rat is hyperphagic due to a loss-of-function mutation in cholecystokinin-1 receptor (CCK-1 receptor), which leads to progressive obesity, insulin resistance and T2D after the majority of skeletal growth is complete...
July 12, 2017: Bone
https://www.readbyqxmd.com/read/28708926/comparison-of-two-porcine-collagen-membranes-combined-with-rhbmp-2-and-rhbmp-9-on-osteoblast-behavior-in-vitro
#8
Masako Fujioka-Kobayashi, Benoit Schaler, Yoshinori Shirakata, Toshiaki Nakamura, Kazuyuki Noguchi, Yufeng Zhang, Richard J Miron
PURPOSE: To investigate the bone-inducing properties of two types of collagen membranes in combination with recombinant human bone morphogenetic protein (rhBMP)-2 and rhBMP-9 on osteoblast behavior. MATERIALS AND METHODS: Porcine pericardium collagen membranes (PPCM) and porcine dermis-derived collagen membranes (PDCM) were coated with either rhBMP-2 or rhBMP-9. The adsorption and release abilities were first investigated via enzyme-linked immunosorbent assay up to 10 days...
July 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28707663/-zinc-finger-protein-521-suppresses-osteogenic-differentiation-of-rat-mesenchymal-stem-cells-by-inhibiting-the-wnt-beta-catenin-signaling-pathway
#9
X-T Xie, X-L Zhan, Z-H Hu
Zinc finger protein 521 (Zfp521) is involved in a number of cellular processes in a variety of cells and tissues. In the present study, the effects of Zfp521 on osteogenic differentiation of rat mesenchymal stem cells (MSCs) were investigated. The results showed that, in rat MSCs, knocking down cellular Zfp521 by short hairpin RNA (shRNA) decreases cell proliferation while promoting ALP activity, calcium accumulation, and the expression of mRNA that encodes bone sialoprotein (BSP), osteocalcin (OCN) and Runx2...
May 2017: Molekuliarnaia Biologiia
https://www.readbyqxmd.com/read/28703881/a-novel-runx2-mutation-in-exon-8-g462x-in-a-patient-with-cleidocranial-dysplasia
#10
Yu-Jin Jung, Han-Sol Bae, Hyun-Mo Ryoo, Seung-Hak Baek
OBJECTIVE: To identify a novel mutation of Runx2 gene in cleidocranial dysplasia (CCD) patients and to characterize the functional consequences of this mutation. MATERIALS AND METHODS: The subjects consisted of 12 Korean CCD patients. After oral epithelial cells were collected using a mouthwash technique, genomic DNA was extracted. Screening for Runx2 mutation was performed using direct sequencing of polymerase chain reaction (PCR) products for exons 1 to 8. Restriction fragment length polymorphism (RFLP) analysis was performed to confirm the novel mutation...
July 13, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28698612/eif2%C3%AE-signaling-regulates-ischemic-osteonecrosis-through-endoplasmic-reticulum-stress
#11
Daquan Liu, Yunlong Zhang, Xinle Li, Jie Li, Shuang Yang, Xiaoxue Xing, Guanwei Fan, Hiroki Yokota, Ping Zhang
Osteonecrosis of the femoral head (ONFH) primarily results from ischemia/hypoxia to the femoral head, and one of the cellular manifestations is the endoplasmic reticulum (ER) stress. To understand possible linkage of ischemic osteonecrosis to the ER stress, a surgery-induced animal model was employed and salubrinal was administered to evaluate the role of ER stress. Salubrinal is a synthetic chemical that inhibits de-phosphorylation of eIF2α, and it can suppress cell death from the ER stress at a proper dose...
July 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28697500/cx43-and-smad-mediated-tgf-%C3%AE-bmp-signaling-pathway-promotes-cartilage-differentiation-of-bone-marrow-mesenchymal-stem-cells-and-inhibits-osteoblast-differentiation
#12
Ya-Dong Zhang, Shi-Chang Zhao, Zhong-Sheng Zhu, Yi-Fei Wang, Jian-Xiang Liu, Zhi-Cai Zhang, Feng Xue
BACKGROUND/AIMS: The aim of this study was to investigate the influence of Cx43- and Smad-mediated TGF-β/BMP signaling pathway on the differentiation of bone marrow mesenchymal stem cells (BMSCs) into cartilage and inhibition of ossification. METHODS: BMSCs of Wistar rats were cultured and assigned into 5 groups for transfection with adenoviruses. Quantitative real-time polymerase chain reaction (qRT-PCR) and Western blotting were employed to detect mRNA and protein expressions of target genes...
July 11, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28696091/enhanced-osseointegration-of-porous-titanium-modified-with-zeolitic-imidazolate-framework-8
#13
Xin Zhang, Junyu Chen, Xiang Pei, Jian Wang, Qianbing Wan, Shaokang Jiang, Chao Huang, Xibo Pei
Nanoscale zeolitic imidazolate framework-8 (ZIF-8)-modified titanium (ZIF-8@AHT) can enhance osteogenesis in vitro. In this study, we systematically and quantitatively examined the effects of ZIF-8@AHT on osteogenesis, and investigated its ability to form bone in vivo. First, we coated various quantities of nanoscale ZIF-8 crystals on alkali- and heat-treated titanium (AHT) by controlling the concentration of the synthesis solution. We then characterized the ZIF-8@AHT materials using scanning electron microscopy (SEM), powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FT-IR), and determination of the sessile drop contact angle...
July 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28696014/effect-of-metformin-on-ossification-and-inflammation-of-fibroblasts-in-ankylosing-spondylitis-an-in-vitro-study
#14
Xiong Qin, Tongmeng Jiang, Jiachang Tan, Huayu Wu, Li Zheng, Jinmin Zhao
Ankylosing spondylitis (AS) is an autoimmune disease characterized by fibroblasts ossification. However, effective drug therapy for AS is lacking. As an antidiabetic drug, metformin has demonstrated an anti-osteogenic effect on osteoblasts in vitro. And it is also a kind of specific agonists for AMPK, which is blocked in the process of AS. Given the role in anti-osteogenesis and AMPK activating, metformin was investigated of its effect on fibroblasts harvested from capsular ligament of patients with femoral neck fracture and ankylosing spondylitis...
July 11, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28694469/osteogenic-factor-runx2-marks-a-subset-of-leptin-receptor-positive-cells-that-sit-atop-the-bone-marrow-stromal-cell-hierarchy
#15
Mengyu Yang, Atsushi Arai, Nobuyuki Udagawa, Toru Hiraga, Zhao Lijuan, Susumu Ito, Toshihisa Komori, Takeshi Moriishi, Koichi Matsuo, Kouji Shimoda, Ali H Zahalka, Yasuhiro Kobayashi, Naoyuki Takahashi, Toshihide Mizoguchi
Bone marrow mesenchymal stem and progenitor cells (BM-MSPCs) maintain homeostasis of bone tissue by providing osteoblasts. Although several markers have been identified for labeling of MSPCs, these labeled cells still contain non-BM-MSPC populations. Studies have suggested that MSPCs are observed as leptin receptor (LepR)-positive cells, whereas osteoblasts can be classified as positive for Runx2, a master regulator for osteoblastogenesis. Here, we demonstrate, using Runx2-GFP reporter mice, that the LepR-labeled population contains Runx2-GFP(low) sub-population, which possesses higher fibroblastic colony-forming units (CFUs) and mesensphere capacity, criteria for assessing stem cell activity, than the Runx2-GFP(-) population...
July 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28691403/effects-of-davallia-formosana-hayata-water-and-alcohol-extracts-on-osteoblastic-mc3t3-e1-cells
#16
Chia-Feng Wu, Yeong-Shenn Lin, Sheng-Chi Lee, Cheng-Yu Chen, Ming-Chang Wu, Jen-Shinn Lin
The Taiwanese native fern Davallia formosana Hayata (DFH) is used to treat bone diseases in classical Chinese medicine. We analyzed MC3T3E1 osteoblasts treated with different concentrations of water and ethanol extracts (10, 25, and 50 [both], and 100 μg/mL [DFE only]) using cell viability, expression of osteoblast differentiation markers [bone morphogenetic protein 2 (BMP-2), collagen 1 (CoL-1), alkaline phosphatase (ALP), and Runt-related transcription factor 2 (Runx 2)], and mineralization. These were significantly increased by DFW or DFE after 24-h incubation compared with the untreated controls...
July 10, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28690192/suppression-of-osteogenic-differentiation-in-mesenchymal-stem-cells-from-patients-with-ossification-of-the-posterior-longitudinal-ligament-by-a-histamine-2-receptor-antagonist
#17
Xizhe Liu, Gentaro Kumagai, Kanichiro Wada, Toshihiro Tanaka, Taku Fujita, Ayako Sasaki, Ken-Ichi Furukawa, Yasuyuki Ishibashi
Mesenchymal stem cells (MSCs) in ossification of the posterior longitudinal ligament (OPLL) patients have a high propensity toward osteogenesis. Histamine receptor H2 (H2R) antagonists (H2 blockers) like famotidine decrease ossification in patients, by an unclear mechanism. To confirm that MSCs express H2R and to clarify how H2 blockers suppress osteogenic differentiation, we used spinal-ligament MSCs from patients with OPLL or with cervical spondylotic myelopathy (CSM) (control). The MSCs were treated with 10, 30, or 100nM famotidine for 7 or 21 days...
July 8, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28690010/tailoring-surface-nanoroughness-of-electrospun-scaffolds-for-skeletal-tissue-engineering
#18
Honglin Chen, Xiaobin Huang, Minmin Zhang, Febriyani Damanik, Matthew B Baker, Anne Leferink, Huipin Yuan, Roman Truckenmüller, Clemens van Blitterswijk, Lorenzo Moroni
Electrospun scaffolds provide a promising approach for tissue engineering as they mimic the physical properties of extracellular matrix. Previous studies have demonstrated that electrospun scaffolds with porous features on the surface of single fibers, enhanced cellular attachment and proliferation. Yet, little is known about the effect of such topographical cues on cellular differentiation. Here, we aimed at investigating the influence of surface roughness of electrospun scaffolds on skeletal differentiation of human mesenchymal stromal cells (hMSCs)...
July 6, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28688862/programmable-cells-of-monocytic-origin-as-a-source-of-osteochondroprogenitors-effect-of-growth-factors-on-osteogenic-differentiation
#19
Yahya Açil, Björn Möller, Jörg Wiltfang, Fred Fändrich, Hendrik Ungefroren
We have demonstrated previously that peripheral blood monocytes can be converted in vitro to a multipotent stem cell-like cell termed programmable cell of monocytic origin (PCMO) and subsequently into cells with chondrocyte-like phenotype. Here, we investigated whether PCMO could also be differentiated into osteoblast-like cells using growth factors with known osteoinductive potency. Following stimulation with BMP-2, BMP-7, IGF-1 or TGF-β1 for 7 and 14 days, PCMOs were analyzed for mRNA expression of collagen types I and V, alkaline phosphatase, osteocalcin, runt-related transcription factor-2 (Runx2) and Osterix (Osx) by quantitative RT-PCR (qPCR) and the levels of collagen I in culture supernatants by ELISA...
June 4, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28688217/yes-associated-protein-1-promotes-the-differentiation-and-mineralization-of-cementoblast
#20
Beining Yang, Hualing Sun, Fangfang Song, Yanru Wu, Jiawei Wang
Yes-associated protein 1 (YAP1) transcriptional coactivator is a mediator of mechanosensitive signaling. Cementum, which covers the tooth root surface, continuously senses external mechanical stimulation. Cementoblasts are responsible for the mineralization and maturation of the cementum. However, the effect of YAP1 on cementoblast differentiation remains largely unknown. In this study, we initially demonstrated that YAP1 overexpression enhanced the mineralization ability of cementoblasts. YAP1 upregulated the mRNA and protein expression of several cementogenesis markers, such as alkaline phosphatase (ALP), runt-related transcription factor 2 (Runx2), osteocalcin (OCN), and dentin matrix acidic phosphoprotein 1 (DMP1)...
July 8, 2017: Journal of Cellular Physiology
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