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https://www.readbyqxmd.com/read/28532084/incorporation-of-bmp-2-loaded-collagen-conjugated-bcp-granules-in-calcium-phosphate-cement-based-injectable-bone-substitutes-for-improved-bone-regeneration
#1
Gun Hee Lee, Preeti Makkar, Kallyanshis Paul, ByongTaek Lee
The objective of the present study was to incorporate surface modified porous multichannel BCP granule into CPC to enhance its in vivo biodegradation and bone tissue growth. The multichannel BCP granule (15wt%) was first coated with collagen subsequent to BMP-2 loading (ccMCG-B). It was then embedded into CPC to form CPC-ccMCG-B system. The newly developed CPC-ccMCG-B system was then examined for SEM, EDX, XRD, setting time, compressive strength, injectability, pH change, BMP-2 release, in vitro as well as in vivo studies and further compared with CPC...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28525525/morphological-observation-on-critical-sized-cranial-defect-repaired-by-icariin-and-autologous-concentrate-growth-factors-in-rabbits
#2
Gang Li, Jie Wang, Guiyun Ren, Fuliang Hao, Yanning Zhang, Peikai Shi, Xiao Liu, Fusheng Dong
BACKGROUND Morphological changes repaired by icariin and autologous concentrate growth factors (ACGF) in critical-sized cranial defect were observed and their promoting effects were investigated. MATERIAL AND METHODS Seventy-two New Zealand white rabbits weighing 1.8~2.0kg were used to build a critical-sized cranial defect model and were randomly divided into 3 groups. X-ray, HE staining, general and histological observation, and immunohistochemistry were used to describe the changes caused by normal saline, icariin, and ACGF...
May 19, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28522401/comparison-of-the-osteogenesis-and-fusion-rates-between-activin-a-bmp-2-chimera-ab204-and-rhbmp-2-in-a-beagle-s-posterolateral-lumbar-spine-model
#3
Guang Bin Zheng, Byung-Hak Yoon, Jae Hyup Lee
BACKGROUND CONTEXT: Activin A/BMP-2 chimera (AB204) could promote bone healing more effectively than recombinant bone morphogenetic protein 2 (rhBMP-2) with much lower dose in rodent model, but there is no report about the effectiveness of AB204 in a large animal model. PURPOSE: The purpose of this study was to compare the osteogenesis and fusion rate between AB204 and rhBMP-2 using biphasic calcium phosphate (BCP) as a carrier in beagle's posterolateral lumbar fusion model...
May 15, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28521202/dual-growth-factor-loaded-nonmulberry-silk-fibroin-carbon-nanofiber-composite-3d-scaffolds-for-in%C3%A2-vitro-and-in%C3%A2-vivo-bone-regeneration
#4
Deboki Naskar, Ananta K Ghosh, Mahitosh Mandal, Piyali Das, Samit K Nandi, Subhas C Kundu
In recent years the potential application of nanocomposite biomaterials in tissue engineering field is gaining importance because of the combined features of all the individual components. A bottom-up approach is acquired in this study to recreate the bone microenvironment. The regenerated silk protein fibroin obtained from nonmulberry tropical tasar Antheraea mylitta species is reinforced with functionalized carbon nano fiber (CNF) and the composite sponges are fabricated using facile green aqueous based method...
May 10, 2017: Biomaterials
https://www.readbyqxmd.com/read/28517970/osteoblast-progenitors-enhance-osteogenic-differentiation-of-periodontal-ligament-stem-cells
#5
Miao Yu, Limei Wang, Pengfei Ba, Linxia Li, Long Sun, Xiaoqi Duan, Pishan Yang, Chengzhe Yang, Qinfeng Sun
BACKGROUND: Osteoblasts and periodontal ligament stem cells (PDLSCs) play an important role in maintaining physiological function of periodontal tissues and participating in periodontal regeneration. Elucidation of interactions between osteoblasts and PDLSCs will aid understanding of periodontal regeneration mechanisms. This study aimed to determine whether pre-osteoblasts can promote osteoblastic/cementoblastic differentiation of PDLSCs. METHODS: PDLSCs were cultured alone (control group), or co-cultured indirectly with human gingival fibroblasts (HGFs) (HGFs group) or MC3T3-E1 cells (OB groups)...
May 18, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28514897/biomaterials-and-bioactive-agents-in-spinal-fusion
#6
Rui M Duarte, Pedro Varanda, Rui L Reis, Ana Rita C Duarte, Jorge Correia-Pinto
Management of degenerative spine pathologies frequently leads to the need for spinal fusion, where bone growth is induced towards stabilization of the interventioned spine. Autologous bone graft (ABG) remains the gold standard inducer, while new bone graft substitutes attempt to achieve effective de novo bone formation and solid fusion. Limited fusion outcomes have driven motivation for more sophisticated and multidisciplinary solutions, involving new biomaterials and/or biologics, through innovative delivery platforms...
May 17, 2017: Tissue Engineering. Part B, Reviews
https://www.readbyqxmd.com/read/28514714/calcitonin-protects-chondrocytes-from-lipopolysaccharide-induced-apoptosis-and-inflammatory-response-through-mapk-wnt-nf-%C3%AE%C2%BAb-pathways
#7
Lai-Bo Zhang, Zhen-Tao Man, Wei Li, Wei Zhang, Xian-Quan Wang, Shui Sun
Calcitonin (CT) is an anti-absorbent, which has long been used for treatment of osteoporosis. However, little information is available about the effects of CT on osteoarthritis (OA). This study was mainly aimed to explore the effects of CT on the treatment of OA, as well as the underlying mechanisms. Chondrocytes were isolated from immature mice and then were incubated with lipopolysaccharide (LPS), CT, small interfering (si) RNA against bone morphogenetic protein (BMP)-2, and/or the inhibitors of MAPK/Wnt/NF-κB pathway...
May 14, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28513557/calcium-supplement-derived-from-gallus-gallus-domesticus-promotes-bmp-2-runx2-smad5-and-suppresses-trap-rank-expression-through-mapk-signaling-activation
#8
Han Seok Yoo, Gyung-Ji Kim, Da Hye Song, Kang-Hyun Chung, Kwon-Jai Lee, Dong-Hee Kim, Jeung Hee An
The present study evaluated the effects of a calcium (Ca) supplement derived from Gallus gallus domesticus (GD) on breaking force, microarchitecture, osteogenic differentiation and osteoclast differentiation factor expression in vivo in Ca-deficient ovariectomized (OVX) rats. One percent of Ca supplement significantly improved Ca content and bone strength of the tibia. In micro-computed tomography analysis, 1% Ca supplement attenuated OVX- and low Ca-associated changes in bone mineral density, trabecular thickness, spacing and number...
May 17, 2017: Nutrients
https://www.readbyqxmd.com/read/28500409/physicochemical-and-biological-characteristics-of-bmp-2-igf-1-loaded-three-dimensional-coaxial-electrospun-fibrous-membranes-for-bone-defect-repair
#9
Lihua Yin, Shaohua Yang, Miaomiao He, Yuchen Chang, Kaijuan Wang, Yidan Zhu, Yuhui Liu, Yaoren Chang, Zhanhai Yu
Coaxial electrospun fibrous membranes show favorable mechanical properties for use in guided bone regeneration (GBR). We used coaxial electrospinning technology to fabricate three-dimensional nanofiber membranes loaded with BMP-2 and IGF-1, and assessed the physicochemical and biological properties of these novel membranes in vitro. We fabricated four experimental groups of BMP-2/IGF-1/BSA-loaded membranes with different flow ratios (shell/core). Membrane characteristics were assessed by scanning and transmission electron microscopy, and laser confocal microscopy...
June 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28489849/utilizing-bmp-2-muteins-for-treatment-of-multiple-myeloma
#10
Axel Seher, Charlotte Lagler, Thorsten Stühmer, Urs Dietmar Achim Müller-Richter, Alexander Christian Kübler, Walter Sebald, Thomas Dieter Müller, Joachim Nickel
Multiple myeloma (MM) represents a haematological cancer characterized by the pathological hyper proliferation of antibody-producing B-lymphocytes. Patients typically suffer from kidney malfunction and skeletal disorders. In the context of MM, the transforming growth factor β (TGFβ) member Activin A was recently identified as a promoter of both accompanying symptoms. Because studies have shown that bone morphogenetic protein (BMP)-2-mediated activities are counteracted by Activin A, we analysed whether BMP2, which also binds to the Activin A receptors ActRII and ActRIIB but activates the alternative SMAD-1/5/8 pathway, can be used to antagonize Activin A activities, such as in the context of MM...
2017: PloS One
https://www.readbyqxmd.com/read/28482139/contributions-of-bmps-in-cardiac-repair-cells-in-3d-in-vitro-models-and-angiogenesis
#11
Isabella Pallotta, Bruce Sun, Gregory Lallos, Cecile Terrenoire, Donald O Freytes
One of the main efforts in myocardial tissue engineering consists of designing cardiac tissues able to rescue the reduction in heart function once implanted at the site of myocardial infarction. To date, the efficiency of this approach in pre-clinical applications is limited in part by our incomplete understanding of the inflammatory environment known to be present at the site of myocardial infarct and by poor vascularization. We recently reported that polarized macrophages known to be present at the site of myocardial infarction secrete BMP-2 and BMP-4 proteins causing changes in the expression of cardiac proteins in a 2D in vitro model...
May 8, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28482125/electrical-stimulation-of-adipose-derived-mesenchymal-stem-cells-and-endothelial-cells-co-cultured-in-a-conductive-scaffold-for-potential-orthopedic-applications
#12
Jieyu Zhang, Koon Gee Neoh, En-Tang Kang
Electrical stimulation (ES) has emerged as a useful tool to regulate cell behavior, but the effect of ES on mesenchymal stem cell (MSC)/vasculogenic cell co-culture has not been investigated. Herein, human adipose-derived MSCs (AD-MSCs) and umbilical vein endothelial cells (HUVECs) were co-cultured in an electrically conductive polypyrrole/chitosan scaffold. Compared to AD-MSC monoculture, calcium deposition in the co-culture without and with ES (200 μA for 4 h per day) was 139% and 346% higher, respectively, after seven days...
May 8, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28474578/kuei-lu-er-xian-jiao-extract-enhances-bmp-2-production-in-osteoblasts
#13
Min-Huan Wu, Ting-Hsuan Lee, Hsiang-Ping Lee, Te-Mao Li, I-Tee Lee, Po-Chuen Shieh, Chih-Hsin Tang
Osteoporosis is a common skeletal disorder, resulting from an imbalance in bone resorption relative to formation. Bone morphogenetic protein (BMP) is a key regulator in bone formation and osteoblastic differentiation. Hence, compounds that promote BMP expression may be suitable candidates for osteoporosis treatment. This study examined the effects of the traditional Chinese medicinal agent, Kuei-Lu-Er-Xian-Jiao (KLEXJ), on BMP-2 production in osteoblasts. We found that KLEXJ extract promoted osteoblastic differentiation marker ALP activity and increased BMP-2 production; pretreatment with PI3K and Akt inhibitors, or small interfering RNA (siRNA), reduced these effects...
March 2017: BioMedicine
https://www.readbyqxmd.com/read/28470893/gene-expression-in-peri-implant-crevicular-fluid-of-smokers-and-nonsmokers-1-the-early-phase-of-osseointegration
#14
Shariel Sayardoust, Omar Omar, Peter Thomsen
BACKGROUND: Smoking is a risk factor for dental implants. The mechanisms behind the impact of smoking on osseointegration are not fully understood. PURPOSE: To investigate the initial molecular and clinical course of osseointegration of different titanium implants in smokers and nonsmokers. MATERIALS AND METHODS: Smoker (n = 16) and nonsmoker (n = 16) patients were included. Each patient received three implant types: machined, oxidized and laser-modified surfaces...
May 3, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28469774/effects-of-altered-cxcl12-cxcr4-axis-on-bmp2-smad-runx2-osterix-axis-and-osteogenic-gene-expressions-during-osteogenic-differentiation-of-mscs
#15
Zhanghua Li, Wei Wang, Haijia Xu, Yu Ning, Weijun Fang, Wen Liao, Ji Zou, Yi Yang, Ningsheng Shao
This study investigated the effects of altered CXCL12/CXCR4 axis on the bone morphogenetic protein 2 (BMP-2)/Smad/runt-related transcription factor 2 (Runx2)/Osterix (Osx) signal axis and osteogenic gene expression during osteogenic differentiation of mesenchymal stem cells (MSCs), to gain understanding of the link between migration and osteogenic differentiation signal axis and MSCs osteogenic differentiation mechanisms. The pHBAd-MCMV- CXCL12-GFP vector (Ad-CXCL12) was constructed and quantitative polymerase chain reaction (qPCR)/western blotting used to determine CXCL12 expression in Ad-CXCL12-transfected MSCs...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28464905/the-korean-herbal-formulation-yukmijihwangtang-stimulates-longitudinal-bone-growth-in-animal-models
#16
Sung-Min Cho, Sun Haeng Lee, Donghun Lee, Ji Hong Lee, Gyu Tae Chang, Hocheol Kim, Jin Yong Lee
BACKGROUND: Yukmijihwangtang (YJT) is a traditional Korean medicine that has been used to treat kidney-yin deficiency symptoms such as dizziness and tinnitus. In addition, because it is also thought to nourish kidney-yin, it has been used to treat short stature from congenital deficiency. This study evaluated the effects of YJT on longitudinal bone growth in rats. METHODS: Female adolescent rats were randomly assigned to groups that received distilled water (per os [p...
May 2, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28457634/combined-effects-of-vascular-endothelial-growth-factor-and-bone-morphogenetic-protein-2-on-odonto-osteogenic-differentiation-of-human-dental-pulp-stem-cells-in%C3%A2-vitro
#17
Hacer Aksel, George T-J Huang
INTRODUCTION: The purpose of this study was to investigate whether combined and concerted delivery of vascular endothelial growth factor (VEGF) and bone morphogenetic protein 2 (BMP-2) enhances odonto/osteogenic differentiation of human dental pulp stem cells (DPSCs) in vitro. METHODS: Various concentrations of VEGF and/or BMP-2 with or without the presence of odonto/osteogenic medium (OM) were added into DPSC cultures for 21 days. The mineral formation in cultures was evaluated using alizarin red stain (ARS)...
April 27, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28457207/early-and-marked-enhancement-of-new-bone-quality-by-alendronate-loaded-collagen-sponge-combined-with-bone-morphogenetic-protein-2-at-high-dose-a-long-term-study-in-calvarial-defects-in-a-rat-model
#18
Tae Hyung Cho, In Sook Kim, Beomseok Lee, Si-Nae Park, Jae-Hyung Ko, Soon Jung Hwang
Choice of appropriate biomaterial is a key factor for the success of recombinant human bone morphogenetic protein (rhBMP)-2 therapy. Inspired by the osteogenic cell differentiating and osteoclast suppressing capabilities of alendronate (ALN), we manufactured a composite type of ALN-loaded collagen sponge (ALN-CS) which controls the early detrimental effect of high-dose rhBMP-2. This study aimed to evaluate ALN-CS as a high-dose rhBMP-2 carrier by investigating its initial bio-molecular effect and efficacy on intramembranous ossification at 1, 4, 8 and 24 weeks using a rat calvarial defect model, compared with non-loaded CS...
April 29, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28457199/bone-regeneration-mediated-by-a-bioactive-and-biodegradable-ecm-like-hydrogel-based-on-elastin-like-recombinamers
#19
Dante J Coletta, Arturo Ibáñez-Fonseca, Liliana R Missana, María V Jammal, Ezequiel J Vitelli, Mariangeles Aimone, Facundo Zabalza, João Paulo Mardegan Issa, Matilde Alonso, José Carlos Rodríguez-Cabello, Sara Feldman
The morbidity of bone fractures and defects is steadily increasing due to changes in the age pyramid. As such, novel biomaterials that are able to promote the healing and regeneration of injured bones are needed in order to overcome the limitations of auto-, allo-, and xenografts, while providing a ready-to-use product that may help to minimize surgical invasiveness and duration. In this regard, recombinant biomaterials, such as elastin-like recombinamers (ELRs), are very promising as their design can be tailored by genetic engineering, thus allowing scalable production and batch-to-batch consistency, amongst others...
April 29, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28453878/titanium-implant-functionalization-with-phosphate-containing-polymers-may-favor-in-vivo-osseointegration
#20
Marcio V Cardoso, Judith de Rycker, Amol Chaudhari, Eduardo Coutinho, Yasuhiro Yoshida, Bart Van Meerbeek, Marcelo F Mesquita, Wander J da Silva, Kumiko Yoshihara, Katleen Vandamme, Joke Duyck
AIM: Osseointegration of titanium implants is predictable, but can be improved via surface functionalization. MATERIALS AND METHODS: 120 implants were installed in parietal bone of 12 domestic pigs and left to heal for 1 or 3 months. Five groups were defined according surface treatments: immersion in water (H2O), 10% polyphosphoric acid (PPA10), 1% phosphorylated pullulan (PPL1), 10% phosphorylated pullulan (PPL10), or 10% phosphorylated pullulan + 1 μg BMP-2 (PPL10 BMP)...
April 28, 2017: Journal of Clinical Periodontology
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