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https://www.readbyqxmd.com/read/28715143/repetitive-short-span-application-of-extracellular-calcium-is-osteopromotive-to-osteoprogenitor-cells
#1
Hyungjin Jung, Thomas Mbimba, Mustafa Unal, Ozan Akkus
Extracellular calcium ([Ca(2+) ]E ) concentration has been suggested to stimulate osteoblastic activity; thus, calcium can be used to enhance fracture healing. However, systemic administration of calcium at high dose levels may cause physiological problems such as hypercalcemia. Short span application of single or repetitive [Ca(2+) ]E stimulus may be suggested as a novel regimen to reduce such side effects. However, osteopromotive effect of such short term [Ca(2+) ]E stimulus on osteoprogenitor cells has not yet been evaluated yet...
July 17, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28714176/osteogenic-differentiation-of-3d-cultured-mesenchymal-stem-cells-induced-by-bioactive-peptides
#2
Vera Lukasova, Matej Buzgo, Vera Sovkova, Jana Dankova, Michala Rampichova, Evzen Amler
OBJECTIVES: Bioactive peptides derived from receptor binding motifs of native proteins are a potent source of bioactive molecules that can induce signalling pathways. These peptides could substitute for osteogenesis promoting supplements. The work presented here compares three kinds of bioactive peptides derived from collagen III, bone morphogenetic protein 7 (BMP-7) and BMP-2 with their potential osteogenic activity on the model of porcine mesenchymal stem cells (pMSCs). MATERIALS AND METHODS: pMSCs were cultured on electrospun polycaprolactone nanofibrous scaffolds with different concentrations of the bioactive peptides without addition of any osteogenic supplement...
August 2017: Cell Proliferation
https://www.readbyqxmd.com/read/28711495/evidence-for-constitutive-bone-morphogenetic-protein-2-secretion-by-m1-macrophages-constitutive-auto-paracrine-osteogenic-signaling-by-bmp-2-in-m1-macrophages
#3
Prabhatchandra R Dube, Lutz Birnbaumer, Guillermo Vazquez
Mechanisms mediating vascular calcification recapitulate osteogenic processes encompassing bone formation and imply participation of bone related proteins such as bone morphogenetic protein-2 (BMP-2). Macrophages are amongst the cells that contribute to vascular ossification by releasing cytokines that induce an osteogenic program in vascular smooth muscle cells, and also by becoming themselves osteoclast-like cells. In inflammatory vascular disease, the macrophage population in the vascular wall is diverse, with the M1 or inflammatory, and the M2 or anti-inflammatory macrophage types being dominant...
July 12, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28707627/mussel-inspired-nano-building-block-assemblies-for-mimicking-extracellular-matrix-microenvironments-with-multiple-functions
#4
Zhenming Wang, Zhanrong Jia, Yanan Jiang, Pengfei Li, Lu Han, Xiong Lu, Fuzeng Ren, Ke-Feng Wang, Huipin Yuan
The assembly of nano-building blocks is an effective way to produce artificial extracellular matrix microenvironments with hierarchical micro/nano structures. However, it is hard to assemble different types of nano-building blocks, to form composite coatings with multiple functions, by traditional layer-by-layer (LbL) self-assembly methods. Inspired by the mussel adhesion mechanism, we developed polydopamine (PDA)-decorated bovine serum albumin nanoparticles (BSA-NPs) and nano-hydroxyapatite (nano-HA), and assembled them to form bioactive coatings with micro/nano structures encapsulating bone morphogenetic protein-2 (BMP-2)...
July 14, 2017: Biofabrication
https://www.readbyqxmd.com/read/28704392/redifferentiation-of-aged-human-articular-chondrocytes-by-combining-bone-morphogenetic-protein-2-and-melanoma-inhibitory-activity-protein-in-3d-culture
#5
Stephan Payr, Brigitte Tichy, Clemens Atteneder, Marc Michel, Thomas Tiefenboeck, Nikolaus Lang, Sylvia Nuernberger, Stefan Hajdu, Elizabeth Rosado-Balmayor, Stefan Marlovits, Christian Albrecht
Melanoma inhibitory activity (MIA) affects the differentiation to hyaline cartilage and can inhibit the osteogenic potential of bone morphogenetic protein (BMP)-2 in mesenchymal stem cells (MSC). The aim of this study was to investigate if MIA also inhibits the osteogenic potential of BMP-2 in human articular chondrocytes during redifferentiation, which may lead to a higher grade of differentiation without calcification. HAC of four female patients (mean age: 73.75 ±6.98) were seeded into 3D culture for 28 days; after adding the recombinant proteins, four groups were formed (Control, BMP-2, MIA, BMP-2+MIA)...
2017: PloS One
https://www.readbyqxmd.com/read/28692499/would-be-prophylactic-administrations-of-low-concentration-of-alendronate-an-alternative-for-improving-the-craniofacial-bone-repair-a-preliminary-study-focused-in-the-period-of-cellular-differentiation-and-tissue-organization
#6
Isabella Göhringer, Carmem L Storrer Muller, Emanuelle Juliana Cunha, Giuliene Nunes De Souza Passoni, Juliana Souza Vieira, João Cesar Zielak, Rafaela Scariot, Tatiana Miranda Deliberador, Allan Fernando Giovanini
BACKGROUND: Alendronate (ALN) is a nitrogen-bisphosphonate that may induce an anabolic effect on craniofacial bone repair when administrated in low doses. Based on this premise, this study analyzed the influence of prophylactic low doses of ALN on bone healing in defects created in rabbit mandible. METHODS: A 5 × 2-mm diameter deep defect was created in the calvaria of 28 rabbits. Fourteen of these rabbits received previously 50 μg/kg of 1% sodium ALN for 4 weeks, while the other rabbits received only 0...
July 7, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28692113/analysing-the-bioactive-makeup-of-demineralised-dentine-matrix-on-bone-marrow-mesenchymal-stem-cells-for-enhanced-bone-repair
#7
S J Avery, L Sadaghiani, A J Sloan, R J Waddington
Dentine matrix has proposed roles for directing mineralised tissue repair in dentine and bone; however, the range of bioactive components in dentine and specific biological effects on bone-derived mesenchymal stem cells (MSCs) in humans are less well understood. The aims of this study were to further elucidate the biological response of MSCs to demineralised dentine matrix (DDM) in enhancing wound repair responses and ascertain key contributing components. Dentine was obtained from human teeth and DDM proteins solubilised with ethylenediaminetetraacetic acid (EDTA)...
July 10, 2017: European Cells & Materials
https://www.readbyqxmd.com/read/28691403/effects-of-davallia-formosana-hayata-water-and-alcohol-extracts-on-osteoblastic-mc3t3-e1-cells
#8
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/28688862/programmable-cells-of-monocytic-origin-as-a-source-of-osteochondroprogenitors-effect-of-growth-factors-on-osteogenic-differentiation
#9
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/28688288/enhanced-osteogenic-activity-of-poly-ester-urea-scaffolds-using-facile-post-3d-printing-peptide-functionalization-strategies
#10
Shan Li, Yanyi Xu, Jiayi Yu, Matthew L Becker
Additive manufacturing has the potential to revolutionize regenerative medicine, but the harsh thermal or photochemical conditions during the 3D printing process limit the inclusion of drugs, growth factors and other biologics within the resulting scaffolds. Functionalization strategies that enable specific placement of bioactive species on the surface of 3D printed structures following the printing process afford a promising approach to sidestep the harsh conditions and incorporate these valuable bioactive molecules with precise control over concentration...
June 28, 2017: Biomaterials
https://www.readbyqxmd.com/read/28687190/a-synthetic-bmp-2-mimicking-peptide-induces-glioblastoma-stem-cell-differentiation
#11
Elena Rampazzo, Monica Dettin, Francesca Maule, Alessandra Scabello, Luisa Calvanese, Gabriella D'Auria, Lucia Falcigno, Elena Porcù, Annj Zamuner, Alessandro Della Puppa, Daniele Boso, Giuseppe Basso, Luca Persano
BACKGROUND: Glioblastoma (GBM) is the most aggressive type of primary brain tumor, characterized by the intrinsic resistance to chemotherapy due to the presence of a highly aggressive Cancer Stem Cell (CSC) sub-population. In this context, Bone Morphogenetic Proteins (BMPs) have been demonstrated to induce CSC differentiation and to sensitize GBM cells to treatments. METHODS: The BMP-2 mimicking peptide, named GBMP1a, was synthesized on solid-phase by Fmoc chemistry...
July 4, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28682898/heterotopic-ossification-related-to-the-use-of-recombinant-human-bmp-2-in-osteonecrosis-of-femoral-head
#12
Lijun Shi, Wei Sun, Fuqiang Gao, Liming Cheng, Zirong Li
Despite the wide use of recombinant human bone morphogenetic protein-2 (rhBMP-2) in bone defect, its application in treating osteonecrosis of femoral head (ONFH) is yet to be elucidated. The heterotopic ossification (HO) after rhBMP-2 usage in some orthopedic surgeries has been reported previously; however, only a few studies describe this complication in the treatment of ONFH.The present study investigated whether the rhBMP-2 application would increase the risk of HO formation in selected ONFH patients with nonvascularized bone grafting surgery and enhance the surgical results of nonvascularized bone grafting as compared to patients who did not receive intraoperative rhBMP-2...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28681971/growth-plate-expression-profiling-large-and-small-breed-dogs-provide-new-insights-in-endochondral-bone-formation
#13
Michelle Teunissen, Frank M Riemers, Dik van Leenen, Marian J A Groot Koerkamp, Björn P Meij, Jacqueline Alblas, Louis C Penning, Alberto Miranda-Bedate, Marianna A Tryfonidou
The difference in the adult height of mammals, and hence in endochondral bone formation, is not yet fully understood and may serve to identify targets for bone and cartilage regeneration. In line with this hypothesis, the intra-species disparity between the adult height of Great Danes and Miniature Poodles was investigated at a transcriptional level. Microarray analysis of the growth plate of 5 Great Danes and 5 Miniature Poodles revealed 2981 unique genes that were differentially expressed, including many genes with an unknown role in skeletal development...
July 6, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28681967/augmentation-of-fracture-healing-by-hydroxyapatite-collagen-paste-and-bone-morphogenetic-protein-2-evaluated-using-a-rat-femur-osteotomy-model
#14
Xuetao Wei, Satoru Egawa, Renpei Matsumoto, Hiroaki Yasuda, Keigo Hirai, Toshitaka Yoshii, Atsushi Okawa, Takehiko Nakajima, Shinichi Sotome
In fracture treatment, biological bone union generally depends on the bone's natural fracture healing capacity, even in surgically treated cases. Hydroxyapatite/collagen composite (HAp/Col) has high osteoconductivity and stimulates osteogenic progenitors. Furthermore, it has the potent capacity to adsorb bone morphogenetic proteins (BMPs). In this study, we prepared an injectable HAp/Col paste and evaluated its augmentation of bone union. Furthermore, the effect of HAp/Col paste combined with BMP-2 was also evaluated...
July 6, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28680714/characteristics-of-contact-and-distance-osteogenesis-around-modified-implant-surfaces-in-rabbit-tibiae
#15
Jung-Yoo Choi, Jae-Hyuk Sim, In-Sung Luke Yeo
PURPOSE: Contact and distance osteogenesis occur around all endosseous dental implants. However, the mechanisms underlying these processes have not been fully elucidated. We hypothesized that these processes occur independently of each other. To test this, we used titanium (Ti) tubes to physically separate contact and distance osteogenesis, thus allowing contact osteogenesis to be measured in the absence of possible triggers from distance osteogenesis. METHODS: Sandblasted and acid-etched (SLA) and modified SLA (modSLA) implants were used...
June 2017: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/28675146/evaluation-of-the-effectiveness-of-a-bmsc-and-bmp-2-polymeric-trilayer-system-in-cartilage-repair
#16
Raquel Vayas, Ricardo Reyes, María Rodríguez-Évora, Carlos Del Rosario, Araceli Delgado, Carmen Évora
In this study a poly(lactide-co-glycolide) acid (PLGA) tri-layer scaffold is proposed for cartilage repair. The trilayer system consists of a base layer formed by a tablet of PLGA microspheres, a second layer composed of a microsphere suspension placed on top of the tablet, and the third layer, which constitutes an external electrospun PLGA thin polymeric membrane. Combinations of bone morphogenetic protein-2 (BMP-2) encapsulated in the microspheres of the suspension layer, and bone marrow mesenchymal stem cells (bMSC) seeded on the electrospun membrane, are evaluated by histologic analyses and immunohistochemistry in a critical size osteochondral defect in rabbits...
July 4, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28675012/-effect-of-naringin-combined-with-bone-morphogenetic-protein-2-on-the-proliferation-and-differentiation-of-mc3t3-e1-cells
#17
Xu Gaoli, Liu Yi, Wu Lili, Shi Qiutao, Huo Guang, Gu Zhiyuan
OBJECTIVE: This study evaluates the biological effects of naringin (NAR) joint bone morphogenetic protein (BMP)-2 on the proliferation, alkaline phosphatase (ALP) activity, and expression of osteoblastogenic genes, such as Runt-related transcription factor 2 (Runx2), collagen Ⅰ (ColⅠ), ALP, and osteocalcin (OCN) of pre-osteoblasts. METHODS: Three different NAR concentrations (10, 100, and 1 000 μmol·L⁻¹) were applied, alone or combined with BMP-2(50 ng·mL⁻¹), to restore the osteoblastogenesis of pre-osteoblasts (MC3T3-E1 cell line)...
June 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28672942/adenovirus-mediated-bone-morphogenetic-protein-2-promotes-osteogenic-differentiation-in-human-mesenchymal-stem-cells-in-vitro
#18
Hong Cao, Zhi-Bo Sun, Lei Zhang, Wei Qian, Chun-Yang Li, Xiao-Peng Guo, Ying Zhang
Delayed and failed bone union following fracture is a common clinical complication that requires treatment in orthopedics. Cell-based therapies and tissue-engineering approaches are potential therapeutic strategies for bone repair and fracture healing. However, the effect of adenovirus expressing bone morphogenetic protein-2 (Ad-BMP-2) on the osteogenic ability of human mesenchymal stem cells (hMSCs) has remained to be fully elucidated. Therefore, in the present study, hMSCs were transduced using Ad-BMP-2 to assess the effects of its application and to determine whether Ad-BMP-2 promotes the osteogenic differentiation of hMSCs...
July 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28666885/sandwich-type-plla-nanosheets-loaded-with-bmp-2-induce-bone-regeneration-in-critical-sized-mouse-calvarial-defects
#19
Kuo-Chin Huang, Fumiko Yano, Yasutaka Murahashi, Shuta Takano, Yoshiaki Kitaura, Song Ho Chang, Kazuhito Soma, Steve W N Ueng, Sakae Tanaka, Kazuhiko Ishihara, Yosuke Okamura, Toru Moro, Taku Saito
To overcome serious clinical problems caused by large bone defects, various approaches to bone regeneration have been researched, including tissue engineering, biomaterials, stem cells and drug screening. Previously, we developed a free-standing biodegradable polymer nanosheet composed of poly(L-lactic acid) (PLLA) using a simple fabrication process consisting of spin-coating and peeling techniques. Here, we loaded recombinant human bone morphogenetic protein-2 (rhBMP-2) between two 60-nm-thick PLLA nanosheets, and investigated these sandwich-type nanosheets in bone regeneration applications...
June 27, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28665279/modified-methods-for-efficiently-differentiating-human-embryonic-stem-cells-into-chondrocyte-like-cells
#20
Wiktoria Maria Suchorska, Ewelina Augustyniak, Magdalena Richter, Magdalena Łukjanow, Violetta Filas, Jacek Kaczmarczyk, Tomasz Trzeciak
INTRODUCTION: Human articular cartilage has a poor regenerative capacity. This often results in the serious joint disease- osteoarthritis (OA) that is characterized by cartilage degradation. An inability to self-repair provided extensive studies on AC regeneration. The cell-based cartilage tissue engineering is a promising approach for cartilage regeneration. So far, numerous cell types have been reported to show chondrogenic potential, among others human embryonic stem cells (hESCs)...
June 19, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
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