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Generation of optimized preparations of bone morphogenetic proteins for bone regeneration.

Correction of inherited skeletal abnormalities, traumas affecting wide bone areas and non-healing fractures require efficient bone formation and regeneration. Bone morphogenetic proteins (BMPs) are signa­ling molecules that play a crucial role in bone and cartilage formation and regeneration. Osteoinductive properties of existing hydroxyapatite-based osteoplastic materials are frequently insufficient for efficient bone regeneration, thus raising a requirement for novel matrices involving BMPs for highly efficient local induction of bone formation at the area of the bone defect. The aim of this study was conducting in vitro optimization of osteoinductive properties of recombinant BMPs preparations to be used in bone regenerative practice. Recombinant BMPs were produced in human embryonic kidney 293 cells upon their transfection or co-transfection with plasmids expressing BMP2 and BMP7 at different ratios. A quality of BMP preps was validated based on their ability to induce in vitro osteoblast differentiation of C2C12 cells. Alkaline phosphatase that is widely used as a marker of osteoblast differentiation was measured spectrophotometrically. We found that the most effective inducer of osteoblast differentiation was recombinant BMP preparation produced upon cotransfection of 85% of BMP2 and 15% of BMP7 plasmids, that is most likely due to generation of conditions most favorable for formation of BMP2/7 heterodimers. Frozen BMP2/7 preparations stored for 3 h in experimental setup and for several weeks in routine work do not lose their osteoinductive properties compared with freshly prepared BMP2/7 preparations and can be successfully used for generation of highly efficient bone regenerative matrices.

2117 related Products with: Generation of optimized preparations of bone morphogenetic proteins for bone regeneration.

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Functional expression of BMP7 receptors in oral epithelial cells. Interleukin-17F production in response to BMP7.

Bone morphogenetic proteins (BMPs) are members of the transforming growth factor-β (TGF-β) superfamily. Recently, BMP7 has been demonstrated to be produced by salivary glands and contribute to embryonic branching in mice. The BMP7 in saliva is thought to be delivered to the oral cavity and is expected to contact with stratified squamous epithelial cells which line the surface of oral mucosa. In this study, we attempted to investigate the effects of BMP7 on oral epithelial cells.

2365 related Products with: Functional expression of BMP7 receptors in oral epithelial cells. Interleukin-17F production in response to BMP7.

Human Interleukin-17F IL- Mouse Interleukin-17F IL- Recombinant Human Interle Recombinant Human Interle Recombinant Human Interle Recombinant Rat Interleuk Recombinant Human Interle Recombinant Human Interle Recombinant Human Interle Recombinant Rat Interleuk Recombinant Rat Interleuk Rat Interleukin-17F IL-17

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Bone morphogenetic protein 7-transduced human dermal-derived fibroblast cells differentiate into osteoblasts and form bone in vivo.

Human dermal-derived fibroblast cells (hDDFCs) are multipotent. Bone morphogenetic proteins (BMPs) are a group of cytokines that promote different developmental processes, including the formation of bone. BMPs can promote hDDFC osteogenesis, but the role of BMP7 in hDDFC osteogenesis in vitro and bone formation in vivo has not been investigated in depth.

2882 related Products with: Bone morphogenetic protein 7-transduced human dermal-derived fibroblast cells differentiate into osteoblasts and form bone in vivo.

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Pericyte-derived bone morphogenetic protein 4 underlies white matter damage after chronic hypoperfusion.

Subcortical small vessel disease (SVD) is characterized by white matter damage resulting from arteriolosclerosis and chronic hypoperfusion. Transforming growth factor beta 1 (TGFB1) is dysregulated in the hereditary SVD, CARASIL (cerebral autosomal recessive arteriopathy with subcortical infarcts and leukoencephalopathy). However, very little is known about the role of the largest group in the TGFB superfamily - the bone morphogenetic proteins (BMPs) - in SVD pathogenesis. The aim of this study was to characterize signaling abnormalities of BMPs in sporadic SVD. We examined immunostaining of TGFB1 and BMPs (BMP2/BMP4/BMP6/BMP7/BMP9) in a total of 19 post-mortem human brain samples as follows: 7 SVD patients (4 males, 76-90 years old); 6 Alzheimer's disease (AD) patients (2 males, 67-93 years old) and 6 age-matched disease controls (3 males, 68-78 years old). We subsequently investigated the effects of oxygen-glucose deprivation and BMP4 addition on cultured cells. Furthermore, adult mice were subjected to chronic cerebral hypoperfusion using bilateral common carotid artery stenosis, followed by continuous intracerebroventricular infusion of the BMP antagonist, noggin. In the SVD cases, BMP4 was highly expressed in white matter pericytes. Oxygen-glucose deprivation induced BMP4 expression in cultured pericytes in vitro. Recombinant BMP4 increased the number of cultured endothelial cells and pericytes and converted oligodendrocyte precursor cells into astrocytes. Chronic cerebral hypoperfusion in vivo also upregulated BMP4 with concomitant white matter astrogliogenesis and reduced oligodendrocyte lineage cells, both of which were suppressed by intracerebroventricular noggin infusion. Our findings suggest ischemic white matter damage evolves in parallel with BMP4 upregulation in pericytes. BMP4 promotes angiogenesis, but induces astrogliogenesis at the expense of oligodendrocyte precursor cell proliferation and maturation, thereby aggravating white matter damage. This may explain white matter vulnerability to chronic hypoperfusion. The regulation of BMP4 signaling is a potential therapeutic strategy for treating SVD.

1778 related Products with: Pericyte-derived bone morphogenetic protein 4 underlies white matter damage after chronic hypoperfusion.

Bone Morphogenetic Protei Bone Morphogenetic Protei Bone Morphogenetic Protei Bone Morphogenetic Protei Bone Morphogenetic Protei Bone Morphogenetic Protei Human Bone Morphogenetic Polyclonal Antibody Bone Anti-BMPR1A(Bone morphoge Anti-BMPR1B(Bone morphoge Anti BMPR1B(Bone morphoge Anti-Bone Morphogenetic P

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Bone Morphogenetic Proteins in Anterior Cervical Fusion: A Systematic Review and Meta-Analysis.

Bone morphogenetic proteins (BMPs) have been commonly used as a graft substitute in spinal fusion. Although the U.S. Food and Drug Administration issued a warning on life-threatening complications of recombinant human BMPs (rhBMPs) in cervical spine fusion in 2008, their off-label use has been continued. This investigation aimed to review the evidence for the use of rhBMP-2 and rhBMP-7 in anterior cervical spine fusions.

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Calcitonin induces collagen synthesis and osteoblastic differentiation in human periodontal ligament fibroblasts.

Extracellular matrix (ECM) secretion and osteogenic differentiation in periodontal ligament fibroblasts (PDLF) facilitate the neogenesis of alveolar bone, which is the cellular basis for alveolar bone repair. Calcitonin (CT) has been reported to play an important role in promoting ECM expression and inducing osteogenic differentiation in osteoblast, but its effects on PDLFs remain obscure.

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BMP9 a possible alternative drug for the recently withdrawn BMP7? New perspectives for (re-)implementation by personalized medicine.

Promotion of rhBMP2 and rhBMP7 for the routine use to support fracture healing has been hampered by high costs, safety concerns and reasonable failure rates, imposing restrictions in its clinical use. Since there is little debate regarding its treatment potential, there is rising need for a better understanding of the mode of action of these BMPs to overcome its drawbacks and promote more efficacious treatment strategies for bone regeneration. Recently, BMP9, owing to its improved osteogenic potential, is gaining attention as a promising therapeutic alternative. Our study aimed at identifying specific gene expression patterns which may predict and explain individual responses to rhBMP7 and rhBMP9 treatments. Therefore, we investigated the effect of rhBMP7 and rhBMP9 on primary human osteoblasts from 110 donors and corresponding THP-1-derived osteoclasts. This was further compared with each other and our reported data on rhBMP2 response. Based on the individual donor response, we found three donor groups profiting from rhBMP treatment either directly via stimulation of osteoblast function or viability and/or indirectly via inhibition of osteoclasts. The response on rhBMP7 treatment correlated with expression levels of the genes BAMBI, SOST, Noggin, Smad4 and RANKL, while the response of rhBMP9 correlated to the expression levels of Alk6, Endoglin, Smurf1, Smurf2, SOST and RANKL in these donors. Noteworthy, rhBMP9 treatment showed significantly increased osteogenic activity (AP activity and Smad nuclear translocation) when compared to the two clinically used rhBMPs. Based on patient's respective expression profiles, clinical application of rhBMP9 either solely or in combination with rhBMP2 and/or rhBMP7 can become a promising new approach to fit the patient's needs to promote fracture healing.

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BMP-7 attenuates left ventricular remodelling under pressure overload and facilitates reverse remodelling and functional recovery.

TGF-β regulates tissue fibrosis: TGF-β promotes fibrosis, whereas bone morphogenetic protein (BMP)-7 is antifibrotic. To demonstrate that (i) left ventricular (LV) remodelling after pressure overload is associated with disequilibrium in the signalling mediated by these cytokines, and (ii) BMP-7 exerts beneficial effects on LV remodelling and reverse remodelling.

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Transforming Growth Factor-β Family Ligands Can Function as Antagonists by Competing for Type II Receptor Binding.

Transforming growth factor-β (TGF-β) family ligands are pleiotropic cytokines. Their physiological activities are not determined by a simple coupling of stimulus and response, but depend critically on context, i.e. the interplay of receptors, ligands, and regulators that form the TGF-β signal transduction system of a cell or tissue. How these different components combine to regulate signaling activities remains poorly understood. Here, we describe a ligand-mediated mechanism of signaling regulation. Based on the observation that the type II TGF-β family receptors ActRIIA, ActRIIB, and BMPRII interact with a large group of overlapping ligands at overlapping epitopes, we hypothesized high affinity ligands compete with low affinity ligands for receptor binding and signaling. We show activin A and other high affinity ligands directly inhibited signaling by the low affinity ligands BMP-2, BMP-7, and BMP-9. We demonstrate activin A functions as a competitive inhibitor that blocks the ligand binding epitope on type II receptors. We propose binding competition and signaling antagonism are integral functions of the TGF-β signal transduction system. These functions could help explain how activin A modulates physiological signaling during extraordinary cellular responses, such as injury and wound healing, and how activin A could elicit disease phenotypes such as cancer-related muscle wasting and fibrosis.

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[Reconstruction of maxillary sinus superior wall fractures with calcium phosphate cement/recombinant human bonemorphogenetic protein 7 compound implanted material in rabbit].

To evaluate the osteogenetic character and repairing maxillary sinus superior wall fractures capability of calcium phosphate cement (CPC) before and after combined with recombinant human bone morphogenetie protein-7(rhBMP-7).

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