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https://www.readbyqxmd.com/read/29917272/enhancing-the-effects-of-exfoliated-carbon-nanofibers-using-bone-morphogenetic-protein-in-a-rat-spinal-fusion-model
#1
Naoki Notani, Masashi Miyazaki, Masahiro Toyoda, Shozo Kanezaki, Toshinobu Ishihara, Hiroshi Tsumura
Exfoliated carbon nanofibers (ExCNFs) are expected to serve as excellent scaffolds for promoting and guiding bone-tissue regeneration. We aimed to enhance the effects of ExCNFs using bone morphogenetic proteins (BMPs) and examined their feasibility and safety in clinical applications using a rat spinal fusion model. Group I (n = 15) animals were implanted with the control carrier; Group II (n = 16) animals were implanted with carrier containing 1 μg ExCNFs; Group III (n = 16) animals were implanted with carrier containing 1 μg recombinant human (rh) BMP-2; and Group IV (n = 17) animals were implanted with carrier containing 1 μg rhBMP-2 and 1 μg ExCNFs...
June 19, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29913119/effect-of-tak1-on-osteogenic-differentiation-of-mesenchymal-stem-cells-by-regulating-bmp-2-via-wnt-%C3%AE-catenin-and-mapk-pathway
#2
Hongpeng Yang, Yue Guo, Dawei Wang, Xiaofei Yang, Chengzhi Ha
Mesenchymal stem cells (MSCs) have the ability to differentiate into osteoblasts and chondrocytes. In vitro osteogenic differentiation is critical but the molecular mechanism has yet to be further clarified. The role of TGF-β activated kinase 1 (TAK1) in MSCs osteogenesis differentiation has not been reported. By adding si-TAK1 and rhTAK1, the osteogenic differentiation of MSCs was measured. Expression levels of the osteoblastic marker genes during osteogenic differentiation of MSCs were checked. As well as molecules involved in BMP and Wnt/β-catenin signaling pathways...
January 2, 2018: Organogenesis
https://www.readbyqxmd.com/read/29907876/in-vitro-evaluation-of-a-lentiviral-two-step-transcriptional-amplification-system-using-gal4ff-transactivator-for-gene-therapy-applications-in-bone-repair
#3
Sofia Bougioukli, Osamu Sugiyama, Ram K Alluri, Robert Yoho, Daniel A Oakes, Jay R Lieberman
In this study, we developed a lentiviral two-step transcriptional amplification (TSTA) system expressing bone morphogenetic protein-2 (BMP-2) under the control of a GAL4FF transactivator to enhance gene expression and limit toxicity for bone repair applications. To this end human MSCs, isolated from bone marrow or adipose tissue, were transduced overnight with a LV-TSTA system (GAL4FF or GAL4vp16) expressing BMP-2 or GFP and evaluated in vitro for transduction efficiency, mean fluorescence intensity, cell viability, and BMP-2 production...
June 15, 2018: Gene Therapy
https://www.readbyqxmd.com/read/29902240/the-effect-of-pulsed-electromagnetic-field-exposure-on-osteoinduction-of-human-mesenchymal-stem-cells-cultured-on-nano-tio2-surfaces
#4
Nora Bloise, Loredana Petecchia, Gabriele Ceccarelli, Lorenzo Fassina, Cesare Usai, Federico Bertoglio, Martina Balli, Massimo Vassalli, Maria Gabriella Cusella De Angelis, Paola Gavazzo, Marcello Imbriani, Livia Visai
Human bone marrow-derived mesenchymal stem cells (hBM-MSCs) are considered a great promise in the repair and regeneration of bone. Considerable efforts have been oriented towards uncovering the best strategy to promote stem cells osteogenic differentiation. In previous studies, hBM-MSCs exposed to physical stimuli such as pulsed electromagnetic fields (PEMFs) or directly seeded on nanostructured titanium surfaces (TiO2) were shown to improve their differentiation to osteoblasts in osteogenic condition. In the present study, the effect of a daily PEMF-exposure on osteogenic differentiation of hBM-MSCs seeded onto nanostructured TiO2 (with clusters under 100 nm of dimension) was investigated...
2018: PloS One
https://www.readbyqxmd.com/read/29896546/abundant-heterotopic-bone-formation-following-use-of-rhbmp-2-in-the-treatment-of-acetabular-bone-defects-during-revision-hip-arthroplasty
#5
Alexander Arzeno, Tim Wang, James I Huddleston
Revision hip arthroplasty in the setting of periacetabular bone loss presents a significant challenge, as options for restoring bone loss are limited. Recombinant human bone morphogenetic protein-2 may offer a solution by promoting bone growth to restore bone stock before implant reimplantation. Here we present a case of a patient with a periprosthetic acetabulum fracture, resulting in pelvic discontinuity as the result of significant periacetabular bone loss. Using a staged approach, periacetabular bone stock was nearly entirely reconstituted using recombinant BMPs and allograft, which resulted in stable fixation, but with abundant heterotopic bone formation...
June 2018: Arthroplasty Today
https://www.readbyqxmd.com/read/29895828/bone-conditioned-medium-contributes-to-initiation-and-progression-of-osteogenesis-by-exhibiting-synergistic-tgf-%C3%AE-1-bmp-2-activity
#6
Maria B Asparuhova, Jordi Caballé-Serrano, Daniel Buser, Vivianne Chappuis
Guided bone regeneration (GBR) often utilizes a combination of autologous bone grafts, deproteinized bovine bone mineral (DBBM), and collagen membranes. DBBM and collagen membranes pre-coated with bone-conditioned medium (BCM) extracted from locally harvested autologous bone chips have shown great regenerative potential in GBR. However, the underlying molecular mechanism remains largely unknown. Here, we investigated the composition of BCM and its activity on the osteogenic potential of mesenchymal stromal cells...
June 12, 2018: International Journal of Oral Science
https://www.readbyqxmd.com/read/29895327/conditioned-medium-from-bone-marrow-derived-mesenchymal-stem-cells-inhibits-vascular-calcification-through-blockade-of-the-bmp2-smad1-5-8-signaling-pathway
#7
Shuangshuang Wang, Siwang Hu, Jian Wang, Yahui Liu, Ruochi Zhao, Maoqing Tong, Hanbin Cui, Nan Wu, Xiaomin Chen
BACKGROUND: Arterial calcification is associated with cardiovascular disease as a complication of advanced atherosclerosis and is a significant contributor to cardiovascular morbidity and mortality. Osteoblastic differentiation of vascular smooth muscle cells (VSMCs) plays an important role in arterial calcification and is characterized by cellular necrosis, inflammation, and lipoprotein and phospholipid complexes, especially in atherosclerotic calcification. The conditioned medium from bone marrow-derived mesenchymal stem cells (MSC-CM) is well known as a rich source of autologous cytokines and is universally used for tissue regeneration in current clinical medicine...
June 13, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29894913/regulation-of-decellularized-tissue-remodeling-via-scaffold-mediated-lentiviral-delivery-in-anatomically-shaped-osteochondral-constructs
#8
Christopher R Rowland, Katherine A Glass, Adarsh R Ettyreddy, Catherine C Gloss, Jared R L Matthews, Nguyen P T Huynh, Farshid Guilak
Cartilage-derived matrix (CDM) has emerged as a promising scaffold material for tissue engineering of cartilage and bone due to its native chondroinductive capacity and its ability to support endochondral ossification. Because it consists of native tissue, CDM can undergo cellular remodeling, which can promote integration with host tissue and enables it to be degraded and replaced by neotissue over time. However, enzymatic degradation of decellularized tissues can occur unpredictably and may not allow sufficient time for mechanically competent tissue to form, especially in the harsh inflammatory environment of a diseased joint...
May 30, 2018: Biomaterials
https://www.readbyqxmd.com/read/29893431/microrna-539-promotes-osteoblast-proliferation-and-differentiation-and-osteoclast-apoptosis-through-the-axna-dependent-wnt-signaling-pathway-in-osteoporotic-rats
#9
Xiong-Bai Zhu, Wen-Jun Lin, Chen Lv, Lu Wang, Zheng-Xiang Huang, Sheng-Wu Yang, Xin Chen
This study aims to explore the effects of miR-539 on osteoblast proliferation and differentiation and osteoclast apoptosis in a rat model of osteoporosis, and its mechanism involving the regulation of the AXIN1-mediated wingless-Int (Wnt) signaling pathway. A rat model of osteoporosis was successfully established by ovariectomy. With osteoblasts and osteoclasts of rats not receiving ovariectomy in the sham group as control, those of osteoporotic rats were treated with miR-539 inhibitor, miR-539 mimic, and AXIN1 shRNA...
June 12, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29885685/preinduction-with-bone-morphogenetic-protein-2-enhances-cardiomyogenic-differentiation-of-c-kit-mesenchymal-stem-cells-and-repair-of-infarcted-myocardium
#10
Yong-Li Wang, Guitao Zhang, Hai-Jie Wang, Yu-Zhen Tan, Xin-Yan Wang
BACKGROUND: Preclinical and clinical trails show that c-kit+ cardiac stem cells can differentiate towards cardiovascular cells and improve cardiac function after myocardial infarction (MI). However, survival and differentiation of the engrafted stem cells within ischemic and inflammatory microenvironment are poor. METHODS: c-Kit+ cells were isolated from mesenchymal stem cells (MSCs) of rat bone marrow. Reliability of preinduction with bone morphogenetic protein-2 (BMP-2) in promotion of survival and differentiation of c-kit+ MSCs was assessed in vitro and after transplantation...
August 15, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29885529/rna-interfering-molecule-delivery-from-in-situ-forming-biodegradable-hydrogels-for-enhancement-of-bone-formation-in-rat-calvarial-bone-defects
#11
Minh K Nguyen, Oju Jeon, Phuong N Dang, Cong T Huynh, Davood Varghai, Hooman Riazi, Alexandra McMillan, Samuel Herberg, Eben Alsberg
RNA interference (RNAi) may be an effective and valuable tool for promoting the growth of functional tissue, as short interfering RNA (siRNA) and microRNA (miRNA) can block the expression of genes that have negative effects on tissue regeneration. Our group has recently reported that the localized and sustained presentation of siRNA against noggin (siNoggin) and miRNA-20a from in situ forming poly(ethylene glycol) (PEG) hydrogels enhanced osteogenic differentiation of encapsulated human bone marrow-derived mesenchymal stem cells (hMSCs)...
June 6, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29863327/sustained-release-of-bmp-2-from-porous-particles-with-leaf-stacked-structure-for-bone-regeneration
#12
Ho Yong Kim, Jin Ho Lee, Han A Reum Lee, Ji-Sung Park, Dong Kyun Woo, Hee-Chun Lee, Gyu-Jin Rho, June-Ho Byun, Se Heang Oh
Sustained release of bioactive molecules from delivery systems is a common strategy for ensuring their prolonged bioactivity and for minimizing safety issues. However, residual toxic reagents, the use of harsh organic solvents, and complex fabrication procedures in conventional delivery systems are considered enormous impediments towards clinical use. Herein, we describe bone morphogenetic protein-2 (BMP-2)-immobilized porous polycaprolactone (PCL) particles with unique leaf-stacked structures (</i>LSS<i> particles) prepared using clinically feasible materials and procedures...
June 4, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29861772/the-role-of-semipurified-fractions-isolated-from-quercus-infectoria-on-bone-metabolism-by-using-hfob-1-19-human-fetal-osteoblast-cell-model
#13
Amira Raudhah Abdullah, Hermizi Hapidin, Hasmah Abdullah
Background. Quercus infectoria (QI) is a plant used in traditional medicines in Asia. The plant was reported to contain various active phytochemical compounds that have potential to stimulate bone formation. However, the precise mechanism of the stimulation effect of QI on osteoblast has not been elucidated. The present study was carried out to isolate QI semipurified fractions from aqueous QI extract and to delineate the molecular mechanism of QI semipurified fraction that enhanced bone formation by using hFOB1...
2018: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/29859350/the-cost-effectiveness-of-minimally-invasive-spine-surgery-in-the-treatment-of-adult-degenerative-scoliosis-a-comparison-of-trans-psoas-and-open-techniques
#14
Ganesh Swamy, Elena Lopatina, Ken C Thomas, Deborah A Marshall, Herman S Johal
INTRODUCTION: Surgical treatment improves quality of life in patients with adult degenerative scoliosis (ADS). However, open ADS surgeries are complex, large magnitude operations associated with a high rate of complications. The lateral trans-psoas interbody fusion technique is a less invasive alternative to open ADS surgery, but less invasive techniques tend to be more expensive. The objective of this study was to evaluate the cost-effectiveness of the trans-psoas technique for patients with ADS over a 12-month time horizon from a public payer perspective...
May 30, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29857981/effect-of-curcumin-on-bone-tissue-in-the-diabetic-rat-repair-of-peri-implant-and-critical-sized-defects
#15
F R Cirano, S P Pimentel, M Z Casati, M G Corrêa, D S Pino, M R Messora, P H F Silva, F V Ribeiro
This study determined the effect of curcumin on bone healing in animals with diabetes mellitus (DM). One hundred rats were divided into five groups: DM+PLAC, DM+CURC, DM+INS, DM+CURC+INS, and non-DM (CURC, curcumin; PLAC, placebo; INS, insulin). Critical calvarial defects were created and titanium implants were inserted into the tibiae. Calvarial defects were analyzed histometrically, and BMP-2, OPN, OPG, RANKL, Runx2, Osx, β-catenin, Lrp-5, and Dkk1 mRNA levels were quantified by PCR. The implants were removed for a torque evaluation, the peri-implant tissue was collected for mRNA quantification of the same bone-related markers, and the tibiae were submitted to micro-computed tomography...
May 29, 2018: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29850574/bone-morphogenetic-proteins-2-4-are-upregulated-during-the-early-development-of-vascular-calcification-in-chronic-kidney-disease
#16
Xiao Wei, Weihua Wu, Li Li, Jiaru Lin, Qi Liu, Linwang Gan, Santao Ou
Vascular calcification is a main cause of increased cardiovascular morbidity and mortality in chronic kidney disease (CKD) patients. This study aimed to investigate the role of the bone morphogenetic protein (BMP) signaling pathway in the early development of vascular calcification in CKD. A CKD vascular calcification rat model was established by providing rats with a 1.8% high-phosphorus diet and an intragastric administration of 2.5% adenine suspension. The kidney and aortic pathologies were analyzed. Blood biochemical indicators, serum BMP-2 and BMP-4 levels, and aortic calcium content were determined...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29849774/bone-morphogenetic-protein-2-exhibits-therapeutic-benefits-for-osteonecrosis-of-the-femoral-head-through-induction-of-cartilage-and-bone-cells
#17
Chunhui Wang, Huimei Zang, Dongsheng Zhou
Osteonecrosis of the femoral head is an orthopedic disease caused by femoral head damage or insufficient blood supply, which leads to the death of bone cells and bone marrow. Osteonecrosis of the femoral head leads to changes in the structure of the femoral head, femoral head collapse and joint dysfunction. Bone morphogenetic protein-2 (BMP-2) exhibits beneficial effects on bone formation, repair and angiogenesis at the femoral head. In the present study, the therapeutic effects of recombinant human BMP-2 containing an Fc fragment (rBMP-2/Fc) were investigated on a steroid induced mouse model of osteonecrosis of the femoral head...
May 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29806345/-effects-of-fty720-p-on-epha2-ephrina2-bidirectional-signaling-in-osteoclasts
#18
Libin Zheng, Dong Huang
Objective: To investigate the effects of FTY720-P on EphA2-EphrinA2 bidirectional signaling in osteoclasts. Methods: Murine RAW264.7 macrophages were induced into osteoclasts by dexamethasone and 1α, 25-dihydroxyvitamin D 3 , and identified by tartrate resistant acid phosphatase (TRAP) staining. Then, the osteoclasts were divided into 2 groups. The osteoclasts were treated with 400 ng/mL FTY720-P in experimental group and without FTY720-P in control group, respectively...
May 1, 2018: Chinese Journal of Reparative and Reconstructive Surgery
https://www.readbyqxmd.com/read/29806303/-osteogenesis-effect-of-dynamic-mechanical-loading-on-mc3t3-e1-cells-in-three-dimensional-printing-biomimetic-composite-scaffolds
#19
Xiugang Song, Hui Li, Ruixin Li, Qingxian Yuan, Yingjie Liu, Wei Cheng, Xizheng Zhang
Objective: To observe the effect of dynamic mechanical loading on the proliferation, differentiation, and specific gene expression of MC3T3-E1 cells that on three-dimensional (3D) biomimetic composite scaffolds prepared by low temperature 3D printing technology combined with freeze-drying. Methods: The silk fibroin, collagen type Ⅰ, and nano-hydroxyapatite (HA) were mixed at a mass ratio of 3∶9∶2 and were used to prepare the 3D biomimetic composite scaffolds via low temperature 3D printing technology combined with freeze-drying...
April 1, 2018: Chinese Journal of Reparative and Reconstructive Surgery
https://www.readbyqxmd.com/read/29803154/potential-of-rhbmp-2-and-dexamethasone-loaded-zein-plla-scaffolds-for-enhanced-in-vitro-osteogenesis-of-mesenchymal-stem-cells
#20
Rongjun Li, Yali Ma, Yan Zhang, Mei Zhang, Dahui Sun
Nanofibers fabricated by electrospinning simulate the extracellular matrix of bone cells and so researchers have taken a keen interest in them for regenerating bone tissue. The aim of this study was to fabricate ideal Zein/PLLA nanofibers by coaxial electrospinning and to load them with bone morphogenetic protein 2 (BMP-2) and dexamethasone (DEX) for dual controlled-release for bone tissue engineering applications. Morphology, surface hydrophilicity and core-shell construction were analyzed by environmental scanning electron microscopy (SEM), water contact angle and transmission electron microscopy (TEM)...
May 19, 2018: Colloids and Surfaces. B, Biointerfaces
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