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Osteoblasts cell matrix

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https://www.readbyqxmd.com/read/27909893/osteogain%C3%A2-loaded-onto-an-absorbable-collagen-sponge-induces-attachment-and-osteoblast-differentiation-of-st2-cells-in-vitro
#1
Richard J Miron, Masako Fujioka-Kobayashi, Yufeng Zhang, Anton Sculean, Benjamin Pippenger, Yoshinori Shirakata, Umadevi Kandalam, Maria Hernandez
OBJECTIVES: Dimensional changes of the alveolar bone following tooth extraction are a major challenge in daily dental practice. To limit bone loss, a variety of biomaterials including bone grafts, barrier membranes, and growth factors have been utilized either alone or in combination therapies to increase the speed and quality of new bone formation. The aim of the present in vitro study was to investigate the regenerative potential of Osteogain®, a new liquid carrier system of enamel matrix derivative (EMD) in combination with an absorbable collagen sponge (ACS) specifically designed for extraction socket healing...
December 1, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/27899994/targeting-of-the-leukemia-microenvironment-by-c-rgdfv-overcomes-the-resistance-to-chemotherapy-in-acute-myeloid-leukemia-in-biomimetic-polystyrene-scaffolds
#2
Zhao-Hua Shen, Dong-Feng Zeng, Xiao-Yan Wang, Ying-Ying Ma, Xi Zhang, Pei-Yan Kong
The bone marrow microenvironment provides a relative sanctuary from cytotoxic drugs for leukemia cells. The present niche models concentrate on a two-dimensional (2D) co-culture system in vitro, which does not imitate the in vivo environment, while the 3D scaffolds are more reflective of this. Osteopontin (Opn) secreted by bone marrow osteoblasts, may participate in protecting leukemia cells from apoptosis by binding to its receptor αvβ3, which can be expressed on the surface of the leukemia MV4-11 cell line...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27893988/endothelin-signaling-in-bone
#3
REVIEW
Jasmin Kristianto, Michael G Johnson, Rafia Afzal, Robert D Blank
The endothelin (ET) system includes 3 small peptide hormones and a pair of G protein-coupled receptors. All 3 ETs are secreted as biologically inert precursors that must be activated by proteolytic cleavage after secretion. This reaction can be catalyzed by a pair of specific, membrane-bound extracellular ET converting enzymes or by nonspecific tissue proteases. The ET1/EDNRA axis is essential in development, with knockout mice for either displaying a similar phenotype featuring multiple defects of the craniofacial skeleton and cardiac outflow tract...
November 11, 2016: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/27893752/effect-of-butyrate-on-collagen-expression-cell-viability-cell-cycle-progression-and-related-proteins-expression-of-mg-63-osteoblastic-cells
#4
Mei-Chi Chang, Yi-Ling Tsai, Eric Jein-Wein Liou, Chia-Mei Tang, Tong-Mei Wang, Hsin-Cheng Liu, Ming-Wei Liao, Sin-Yuet Yeung, Chiu-Po Chan, Jiiang-Huei Jeng
AIMS: Butyric acid is one major metabolic product generated by anaerobic Gram-negative bacteria of periodontal and root canal infection. Butyric acid affects the activity of periodontal cells such as osteoblasts. The purposes of this study were to investigate the effects of butyrate on MG-63 osteoblasts. METHODS: MG-63 cells were exposed to butyrate and cell viability was estimated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The mRNA and protein expression of type I collagen and cell cycle-related proteins were measured by reverse-transcriptase polymerase chain reaction (RT-PCR), western blotting or immunofluorescent staining...
2016: PloS One
https://www.readbyqxmd.com/read/27889088/osteoblast-cellular-activity-on-low-elastic-modulus-ti-24nb-4zr-8sn-alloy
#5
K C Nune, R D K Misra, S J Li, Y L Hao, R Yang
OBJECTIVES: Low modulus β-titanium alloys with non-toxic alloying elements are envisaged to provide good biocompatibility and alleviate the undesired stress shielding effect. The objective of this study is to fundamentally elucidate the biological response of novel high strength-low elastic modulus Ti2448 alloy through the study of bioactivity and osteoblast cell functions. METHODS: Characterization techniques such as SEM, EDX, XRD, and fluorescence microscopy were utilized to analyze the microstructure, morphology, chemical composition, and cell adhesion...
November 23, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27888725/functional-response-of-osteoblasts-in-functionally-gradient-titanium-alloy-mesh-arrays-processed-by-3d-additive-manufacturing
#6
K C Nune, A Kumar, R D K Misra, S J Li, Y L Hao, R Yang
We elucidate here the osteoblasts functions and cellular activity in 3D printed interconnected porous architecture of functionally gradient Ti-6Al-4V alloy mesh structures in terms of cell proliferation and growth, distribution of cell nuclei, synthesis of proteins (actin, vinculin, and fibronectin), and calcium deposition. Cell culture studies with pre-osteoblasts indicated that the interconnected porous architecture of functionally gradient mesh arrays was conducive to osteoblast functions. However, there were statistically significant differences in the cellular response depending on the pore size in the functionally gradient structure...
November 18, 2016: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/27885781/cellular-response-of-osteoblasts-to-low-modulus-ti-24nb-4zr-8sn-alloy-mesh-structure
#7
K C Nune, R D K Misra, S J Li, Y L Hao, R Yang
Titanium alloys (Ti-6Al-4V and Ti-6Al-7Nb) are widely used for implants, which are characterized by high elastic modulus (∼110 GPa) with (α + β) structure and that may induce undesirable stress shielding effect and immune responses associated with the presence of toxic elements. In this regard, we have combined the attributes of a new alloy design and the concept of additive manufacturing to fabricate 3D scaffolds with an interconnected porous structure. The new alloy is a β-type Ti-24Nb-4Zr-8Sn (Ti2448) alloy with significantly reduced modulus...
November 25, 2016: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/27885179/-bone-homeostasis-and-mechano-biology
#8
Tomoki Nakashima
The weight-bearing exercises help to build bones and to maintain them strength. Bone is constantly renewed by the balanced action of osteoblastic bone formation and osteoclastic bone resorption both of which mainly occur at the bone surface. This restructuring process called "bone remodeling" is important not only for normal bone mass and strength, but also for mineral homeostasis. Bone remodeling is stringently regulated by communication between bone component cells such as osteoclasts, osteoblasts and osteocytes...
2016: Clinical Calcium
https://www.readbyqxmd.com/read/27884778/expression-of-adipokines-in-osteoarthritis-osteophytes-and-their-effect-on-osteoblasts
#9
Susann Junker, Klaus W Frommer, Grit Krumbholz, Lali Tsiklauri, Rüdiger Gerstberger, Stefan Rehart, Jürgen Steinmeyer, Markus Rickert, Sabine Wenisch, Georg Schett, Ulf Müller-Ladner, Elena Neumann
OBJECTIVE: Osteophyte formation in osteoarthritis (OA) is mediated by increased osteoblast activity, which is -in turn- regulated by the Wnt signaling pathway. Obesity is regarded a risk factor in OA, yet little is known about the interaction between adipose tissue-derived factors, the adipokines, and bone formation, although adipokines are associated with the pathogenesis of OA. Therefore, the effect of adipokines on bone and cartilage forming cells and osteophyte development was analyzed...
November 21, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/27879684/role-of-osteogenic-growth-peptide-ogp-and-ogp-10-14-in-bone-regeneration-a-review
#10
REVIEW
Suzane C Pigossi, Marcell C Medeiros, Sybele Saska, Joni A Cirelli, Raquel M Scarel-Caminaga
Bone regeneration is a process that involves several molecular mediators, such as growth factors, which directly affect the proliferation, migration and differentiation of bone-related cells. The osteogenic growth peptide (OGP) and its C-terminal pentapeptide OGP(10-14) have been shown to stimulate the proliferation, differentiation, alkaline phosphatase activity and matrix mineralization of osteoblastic lineage cells. However, the exact molecular mechanisms that promote osteoblastic proliferation and differentiation are not completely understood...
November 22, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27862226/histone-h4-methyltransferase-suv420h2-maintains-fidelity-of-osteoblast-differentiation
#11
Khani Farzaneh, Roman Thaler, Christopher R Paradise, David R Deyle, Marianne Kruijthof-de Julio, Mario Galindo, Jonathan A Gordon, Gary S Stein, Amel Dudakovic, Andre J van Wijnen
Osteogenic lineage commitment and progression is controlled by multiple signaling pathways (e.g., WNT, BMP, FGF) that converge on bone-related transcription factors. Access of osteogenic transcription factors to chromatin is controlled by epigenetic regulators that generate post-translational modifications of histones ("histone code"), as well as read, edit and/or erase these modifications. Our understanding of the biological role of epigenetic regulators in osteoblast differentiation remains limited. Therefore, we performed next-generation RNA sequencing (RNA-seq) and established which chromatin-related proteins are robustly expressed in mouse bone tissues (e...
November 9, 2016: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/27860335/development-of-a-synthetic-tissue-engineered-3d-printed-bioceramic-based-bone-graft-with-homogenously-distributed-osteoblasts-and-mineralizing-bone-matrix-in-vitro
#12
Doaa Adel-Khattab, Francesca Giacomini, Renate Gildenhaar, Georg Berger, Cynthia Gomes, Ulf Linow, Martin Hardt, Barbara Peleska, Jens Günster, Michael Stiller, Alireza Houshmand, Khaled Abdel Ghaffar, Ahmed Gamal, Mohamed El-Mofty, Christine Knabe
Over the last decade there have been increasing efforts to develop 3D scaffolds for bone tissue engineering from bioactive ceramics with 3D printing emerging as a promising technology. The overall objective of the present study was to generate a tissue engineered synthetic bone graft with homogenously distributed osteoblasts and mineralizing bone matrix in vitro, thereby mimicking the advantageous properties of autogenous bone grafts and facilitating usage for reconstructing segmental discontinuity defects in vivo...
November 15, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27859405/effects-of-bmp9-and-pulsed-electromagnetic-fields-on-the-proliferation-and-osteogenic-differentiation-of-human-periodontal-ligament-stem-cells
#13
Tingting Wang, Pei Wang, Zhizhong Cao, Xingxing Wang, Dalin Wang, Yaxian Shen, Da Jing, Erping Luo, Weizhong Tang
Periodontal ligament stem cells (PDLSCs) have been confirmed to have self-renewal capacity and multidifferentiation potential and are good candidates for periodontal tissue regeneration. Pulsed electromagnetic field (PEMF) has been demonstrated to promote osteogenesis in non-union fractures, partly by regulating mesenchymal stem cells or osteoblast activity. However, there is no report about the osteo-inductive effect of PEMF stimulation on human PDLSCs (hPDLSCs). Thus, we tested the hypothesis that PEMF biophysical stimulation alone has an influence on the proliferation and osteogenic differentiation of hPDLSCs...
November 11, 2016: Bioelectromagnetics
https://www.readbyqxmd.com/read/27856662/therapeutic-implications-of-suppressing-osteoclast-formation-versus-function
#14
REVIEW
Steven L Teitelbaum
Anti-resorptive therapy is the principal means of treating osteoporotic disorders. The two families of presently available anti-resorptive drugs, namely bisphosphonates and denosumab, dampen activity of osteoclasts by reducing their number. In consequence, these agents also arrest bone remodelling eventuating suppressed formation as well as resorption. Evidence exists that osteoclasts recruit osteoblasts to sites of bone remodelling by mobilizing chemotactic proteins from matrix and direct secretion of such proteins that attract osteoblast precursors...
December 2016: Rheumatology
https://www.readbyqxmd.com/read/27856358/p2x7rs-are-involved-in-cell-death-growth-and-cellular-signaling-in-primary-human-osteoblasts
#15
Ankita Agrawal, Zanne Henriksen, Susanne Syberg, Solveig Petersen, Derya Aslan, Marie Solgaard, Nis Nissen, Tommy Korsgaard Larsen, Peter Schwarz, Thomas H Steinberg, Niklas Rye Jørgensen
The ionotropic ATP-gated P2X7 receptor (P2X7R) is involved in the regulation of many physiological functions including bone metabolism. Several studies on osteoblasts from rodents and human osteoblast-like cell lines have addressed the expression and function of P2X7R on these bone-forming cells however; its role in human primary osteoblasts has not yet been reported. The aim of this study was to assess the expression of the P2X7R in bone marrow-derived stromal cells and in primary human trabecular osteoblasts and to determine the function in bone formation and cell signaling...
November 14, 2016: Bone
https://www.readbyqxmd.com/read/27846781/osteoblast-differentiation-and-bone-matrix-formation-in-vivo-and-in-vitro
#16
Harry C Blair, Quitterie C Larrouture, Yanan Li, Hang Lin, Donna Beer Stolz, Li Liu, Rocky Tuan, Lisa J Robinson, Paul H Schlesinger, Deborah J Nelson
We review the characteristics of osteoblast differentiation and bone matrix synthesis. Bone in air breathing vertebrates is a specialized tissue that developmentally replaces simpler solid tissues, usually cartilage. Bone is a living organ bounded by a layer of osteoblasts that, because of transport and compartmentalization requirements, produce bone matrix exclusively as an organized tight epithelium. With matrix growth, osteoblasts are reorganized and incorporated into the matrix as living cells, osteocytes, that communicate with each other and surface epithelium via cell processes within canaliculi in the matrix...
November 16, 2016: Tissue Engineering. Part B, Reviews
https://www.readbyqxmd.com/read/27842921/suppression-of-osteoblast-related-genes-during-osteogenic-differentiation-of-adipose-tissue-derived-stromal-cells
#17
Yahya Açil, Amir Alexander Ghoniem, Aydin Gülses, Tobias Kisch, Felix Stang, Jörg Wiltfang, Matthias Gierloff
Recent studies indicated a lower osteogenic differentiation potential of adipose tissue-derived stromal cells (ASCs) compared to bone marrow derived mesenchymal stromal cells. The aim of this study was to evaluate the effects of potent combinations of highly osteogenic bone morphogenetic proteins (BMPs) in order to enhance the osteogenic differentiation potential of ASCs. Human ASCs were cultured for 10 days in the presence of osteogenic medium consisting of dexamethasone, ß-glycerophosphate and ascorbat-2-phosphate (OM) supplemented with BMP-2, BMP-6, BMP-9+IGF-2 and BMP-2,-6,-9 (day 1+2: 50 ng/ml, days 3-6: 100 ng/ml, days 7-10: 200 ng/ml)...
October 18, 2016: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/27837015/the-role-of-pannexin-3-in-bone-biology
#18
REVIEW
M Ishikawa, Y Yamada
Cell-cell and cell-matrix communications play important roles in both cell proliferation and differentiation. Gap junction proteins mediate signaling communication by exchanging small molecules and dramatically stimulating intracellular signaling pathways to determine cell fate. Vertebrates have 2 gap junction families: pannexins (Panxs) and connexins (Cxs). Unlike Cxs, the functions of Panxs are not fully understood. In skeletal formation, Panx3 and Cx43 are the most abundantly expressed gap junction proteins from each family...
November 11, 2016: Journal of Dental Research
https://www.readbyqxmd.com/read/27818256/eurycoma-longifolia-as-a-potential-alternative-to-testosterone-for-the-treatment-of-osteoporosis-exploring-time-mannered-proliferative-differentiative-and-morphogenic-modulation-in-osteoblasts
#19
Hnin Ei Thu, Isa Naina Mohamed, Zahid Hussain, Ahmad Nazrun Shuid
ETHNOPHARMACOLOGICAL RELEVANCE: Eurycoma longifolia (EL) has been well-studied traditionally as a chief ingredient of many polyherbal formulations for the management of male osteoporosis. It has also been well-recognised to protect against bone calcium loss in orchidectomised rats. AIM OF THE STUDY: To evaluate the effects of EL on the time-mannered sequential proliferative, differentiative, and morphogenic modulation in osteoblasts compared with testosterone. MATERIALS AND METHODS: Cell proliferation was analysed using MTS assay and phase contrast microscopy...
November 3, 2016: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27814695/transcription-factor-znf25-is-associated-with-osteoblast-differentiation-of-human-skeletal-stem-cells
#20
Natalie A Twine, Linda Harkness, Moustapha Kassem, Marc R Wilkins
BACKGROUND: The differentiation of human bone marrow derived skeletal stem cells (known as human bone marrow stromal or mesenchymal stem cells, hMSCs) into osteoblasts involves the activation of a small number of well-described transcription factors. To identify additional osteoblastic transcription factors, we studied gene expression of hMSCs during ex vivo osteoblast differentiation. RESULTS: Clustering of gene expression, and literature investigation, revealed three transcription factors of interest - ZNF25, ZNF608 and ZBTB38...
November 4, 2016: BMC Genomics
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