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https://www.readbyqxmd.com/read/29321139/bmp-smad-pathway-promotes-neurogenesis-of-midbrain-dopaminergic-neurons-in-vivo-and-in-human-induced-pluripotent-and-neural-stem-cells
#1
V M Jovanovic, A Salti, H Tilleman, K Zega, M M Jukic, H Zou, R H Friedel, N Prakash, S Blaess, F Edenhofer, C Brodski
The embryonic formation of midbrain dopaminergic (mDA) neurons in vivo provides critical guidelines for the in vitro differentiation of mDA neurons from stem cells, currently being developed for Parkinson's disease cell replacement therapy. Bone morphogenetic protein (BMP)/SMAD inhibition is routinely used during early steps of stem cell differentiation protocols, including for the generation of mDA neurons. However, the function of the BMP/SMAD pathway for in vivo specification of mammalian mDA neurons is virtually unknown...
January 10, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29310362/wrapping-grafting-for-congenital-pseudarthrosis-of-the-tibia-a-preliminary-report
#2
An Yan, Hai-Bo Mei, Kun Liu, Jiang-Yan Wu, Jin Tang, Guang-Hui Zhu, Wei-Hua Ye
OBJECTIVE: Treatment of congenital pseudarthrosis of the tibia (CPT) remains a challenge. The autogenic iliac bone graft is important consistent of treatment for CPT. The purpose of this study was to investigate the role of wrapping autogenic iliac bone graft in improvement of the curing opportunities of CPT. METHODS: We combined Ilizarov fixator with intramedullary rodding of the tibia and wrapping autogenic iliac bone graft for treatment 51 cases of CPT between 2007 and 2010...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29304115/effects-of-a-self-assembling-peptide-as-a-scaffold-on-bone-formation-in-a-defect
#3
Kei Ando, Shiro Imagama, Kazuyoshi Kobayashi, Kenyu Ito, Mikito Tsushima, Masayoshi Morozumi, Satoshi Tanaka, Masaaki Machino, Kyotaro Ota, Koji Nishida, Yoshihiro Nishida, Naoki Ishiguro
Spinal fusion and bone defect after injuries, removal of bone tumors, and infections need to be repaired by implantation. In an aging society, recovery from these procedures is often difficult. In this study, we found that injection of SPG-178 leads to expression of several bone marker genes and mineralization in vitro, and revealed a significantly higher degree of newly formed bone matrix with use of SPG-178 in vivo. MC3T3-E1 cells were used to evaluate osteoblast differentiation promoted by SPG-178. To analyze gene expression, total RNA was isolated from MC3T3-E1 cells cultured for 7 and 14 days with control medium or SPG-178 medium...
2018: PloS One
https://www.readbyqxmd.com/read/29303122/microarray-analysis-of-the-gene-expression-profile-in-triethylene-glycol-dimethacrylate-treated-human-dental-pulp-cells
#4
D Torun, Z Ö Torun, K Demirkaya, M Sarper, M P Elçi, F Avcu
OBJECTIVE: Triethylene glycol dimethacrylate (TEGDMA) is an important resin monomer commonly used in the structure of dental restorative materials. Recent studies have shown that unpolymerized resin monomers may be released into the oral environment and cause harmful biological effects. We investigated changes in the gene expression profiles of TEGDMA-treated human dental pulp cells (hDPCs) following short- (1-day) and long-term (7-days) exposure. MATERIALS AND METHODS: HDPCs were exposed to a noncytotoxic concentration of TEGDMA, and gene expression profiles were evaluated by microarray analysis...
November 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/29301269/enhancing-of-osseointegration-with-propolis-loaded-tio%C3%A2-nanotubes-in-rat-mandible-for-dental-implants
#5
Nithideth Somsanith, Yu-Kyoung Kim, Young-Seok Jang, Young-Hee Lee, Ho-Keun Yi, Jong-Hwa Jang, Kyoung-A Kim, Tae-Sung Bae, Min-Ho Lee
TiO₂ nanotubes (TNT) formation is beneficial for improving bone cell-material interaction and drug delivery for Ti dental implants. Among the natural drugs to be installed in TNT, selected propolis has antibacterial and anti-inflammatory properties. It is a resinous natural product which is collected by the honeybees from the various types of plants with their salivary enzymes. This study concludes that TNT loaded with a propolis (PL-TNT-Ti) dental implant has the ability to improve osseointegration. The propolis particles were embedded within the TNT or adhered to the top...
January 1, 2018: Materials
https://www.readbyqxmd.com/read/29287161/evaluation-of-equine-synovial-derived-extracellular-matrix-scaffolds-seeded-with-equine-synovial-derived-mesenchymal-stem-cells
#6
Nathalie A Reisbig, Hayam A Hussein, Erin Pinnell, Alicia L Bertone
OBJECTIVE To create a bioactive synovium scaffold by infusing decellularized synovial-derived extracellular matrix (synECM) with synovial-derived mesenchymal stem cells (synMSCs). SAMPLE Synovium from the femoropatellar and medial femorotibial joints of equine cadavers. PROCEDURES The synMSCs were cultured in monolayer and not treated or cotransduced to enhance expression of green fluorescent protein (GFP) and human bone morphogenetic protein (BMP)-2. The synECM was decellularized with 0.1% peracetic acid and then seeded with synMSCs (0...
January 2018: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/29285071/bmp-7-accelerates-the-differentiation-of-rabbit-mesenchymal-stem-cells-into-cartilage-through-the-wnt-%C3%AE-catenin-pathway
#7
Hong-Dan Fu, Hai-Rui Wang, Dai-He Li
Mesenchymal stem cells (MSCs) are able to differentiate into adipocytes, chondroblasts or cartilage under different stimulation conditions. Identifying a mechanism that triggers the differentiation of MSCs into cartilage may help the development of novel therapeutic approaches for heterotopic ossification, the pathological formation of lamellar bone in soft tissue outside the skeleton that may lead to debilitating immobility. Bone morphogenetic proteins (BMPs), including BMP-7, are the most potent growth factors for enhancing bone formation...
December 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29279455/exogenous-bmp-7-facilitates-the-recovery-of-cardiac-function-after-acute-myocardial-infarction-through-counteracting-tgf-%C3%AE-1-signaling-pathway
#8
Yalei Jin, Xinyao Cheng, Jinping Lu, Xia Li
Myocardial fibrosis after acute myocardial infarction (AMI) is one of the main causes of myocardial remodeling and heart function abnormalities. Bone morphogenetic protein-7 (BMP-7) has been reported to play essential roles in anti-fibrosis. In this study, we demonstrated the role of exogenous BMP-7 on myocardial fibrosis and heart function recovery after AMI. A rat model of AMI was established via ligation of the left anterior descending coronary artery (LAD). Twenty rats were grouped into sham group which underwent chest open operation, but did not receive LAD ligation...
2018: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29250330/bbp-functionalized-biomimetic-nanofibrous-scaffold-can-capture-bmp2-and-promote-osteogenic-differentiation
#9
Qingqing Yao, Eric S Sandhurst, Yangxi Liu, Hongli Sun
Bone morphogenetic proteins (BMPs, e.g., BMP2 and 7) are potent mediators for bone repair, however, their clinical use has been limited by their safety and cost-effectiveness. Therefore, innovative strategies that can improve the efficacy of BMPs, and thereby, use a lower dose of exogenous BMPs are highly desired. Inspired by the natural interaction between extracellular matrix (ECM) and growth factors, we hypothesize that bone matrix-mimicking nanofibrous scaffold functionalized with BMP binding moieties can selectively capture and stabilize BMPs, and thereby, promote BMP-induced osteogenic differentiation...
2017: Journal of Materials Chemistry. B, Materials for Biology and Medicine
https://www.readbyqxmd.com/read/29229532/inflammation-and-renal-fibrosis-recent-developments-on-key-signaling-molecules-as-potential-therapeutic-targets
#10
REVIEW
Wenshan Lv, George W Booz, Yangang Wang, Fan Fan, Richard J Roman
Chronic kidney disease (CKD) is a major public health issue. At the histological level, renal fibrosis is the final common pathway of progressive kidney disease irrespective of the initial injury. Considerable evidence now indicates that renal inflammation plays a central role in the initiation and progression of CKD. Some of the inflammatory signaling molecules involved in CKD include: monocyte chemoattractant protein-1 (MCP-1), bradykinin B1 receptor (B1R), nuclear factor κB (NF-κB), tumor necrosis factor-α (TNFα), transforming growth factor β (TGF-β), and platelet-derived growth factor (PDGF)...
February 5, 2018: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29228886/continuous-stimulation-with-differentiation-factors-is-necessary-to-enhance-osteogenic-differentiation-of-human-mesenchymal-stem-cells-in-vitro
#11
Bruno Reible, Gerhard Schmidmaier, Matthäus Prokscha, Arash Moghaddam, Fabian Westhauser
Bone defect treatment belongs to the most challenging fields in orthopedic surgery and requires the well-coordinated application of mesenchymal stem cells (MSC) and differentiation factors. MSC isolated from reaming material (RMSC) and iliac crest (BMSC) in combination with bone morphogenetic protein-7 (BMP-7) and insulin-like growth factor-1 (IGF-1) have been used. The short half-life of both factors limit their applications: a burst release of the factor can probably not induce sustainable differentiation...
October 2017: Growth Factors
https://www.readbyqxmd.com/read/29202447/bone-forming-peptide-3-induces-osteogenic-differentiation-of-bone-marrow-stromal-cells-via-regulation-of-the-erk1-2-and-smad1-5-8-pathways
#12
Jun Sik Lee, Mi Eun Kim, Jong Keun Seon, Ju Yeon Kang, Taek Rim Yoon, Yong-Duk Park, Hyung Keun Kim
A bone-remodeling imbalance induced by increased bone resorption and osteoclast formation causes skeletal diseases such as osteoporosis. Induction of osteogenic differentiation of bone marrow stromal cells (BMSCs) leads to bone regeneration. Many researchers have tried to develop new adjuvants as specific stimulators of bone regeneration for therapeutic use in patients with bone resorption. We tried to develop a new adjuvant that has stronger osteogenic differentiation-promoting activity than bone morphogenetic proteins (BMPs)...
November 22, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/29178320/low-oxygen-conditions-promote-synergistic-increases-in-chondrogenesis-during-co-culture-of-human-osteoarthritic-stem-cells-and-chondrocytes
#13
Susan E Critchley, Rajalakshmanan Eswaramoorthy, Daniel J Kelly
There has been increased interest in co-cultures of stem cells and chondrocytes for cartilage tissue engineering as there are the limitations associated with using either cell type alone. Drawbacks associated with the use of chondrocytes include the limited numbers of cells available for isolation from damaged or diseased joints, their dedifferentiation during in vitro expansion and a diminished capacity to synthesise cartilage-specific extracellular matrix components with age and disease. This has motivated the use of adult stem cells with either freshly isolated or culture expanded chondrocytes for cartilage repair applications, however the ideal combination of cells and environmental conditions for promoting robust chondrogenesis remains unclear...
November 26, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29173997/the-impact-of-different-torques-for-the-insertion-of-immediately-loaded-implants-on-the-peri-implant-levels-of-angiogenesis-and-bone-related-markers
#14
A Verrastro Neto, R Andrade, M G Corrêa, R C V Casarin, M Z Casati, S P Pimentel, F V Ribeiro, F R Cirano
The aim of this split-mouth, randomized, double-blind, controlled clinical trial was to evaluate the influence of different insertion torque values for dental implants on bone- and angiogenesis-related marker profiles. Eighteen edentulous patients received dental implants and fixed complete-arch mandibular prostheses. The implants (n=36) were assigned randomly to two groups: reduced torque (n=18), with insertion torque <30Ncm; and conventional torque (n=18), with insertion torque ≥30Ncm. Levels of vascular endothelial growth factor (VEGF), placental growth factor, bone morphogenetic protein 9 (BMP-9), periostin, osteoprotegerin (OPG), and tartrate-resistant acid phosphatase (TRAP) in the peri-implant fluid were quantified at 7, 14, 30, and 120days after implant placement...
November 22, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29164771/functional-self-assembled-peptide-scaffold-inhibits-tnf-alpha-induced-inflammation-and-apoptosis-in-nucleus-pulposus-cells-by-suppressing-nf-%C3%AE%C2%BAb-signaling
#15
Xiaochuan Li, Shi Cheng, Yaohong Wu, Jingwei Ying, Chaofeng Wang, Tianyong Wen, Xuedong Bai, Wei Ji, Deli Wang, Dike Ruan
Although nucleus pulposus (NP) tissue engineering has achieved tremendous success, researches still face the huge obstacles in maintaining cell survival and function. A novel functional self-assembled peptide RADA-KPSS was constructed by conjugating BMP-7 short active fragment (KPSS) to the C-terminus of RADA16-I that displays anti-inflammatory and anti-apoptosis effects. However, whether this functional self-assembled RADA-KPSS peptide can alleviate inflammation and NPC apoptosis induced by TNF-α has not been studied...
November 22, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29160182/enhanced-bone-regeneration-via-diabetic-cell-based-adenoviral-bmp2-gene-therapy-in-diabetic-animals
#16
Shin-Young Park, Kyoung-Hwa Kim, Chan Ho Park, Seung-Yun Shin, In-Chul Rhuy, Yong-Moo Lee, Yang Jo Seol
The application of bone morphogenetic protein 2 (BMP-2) has been extensively investigated to improve diabetes-impaired bone healing; however, the delivery of BMP-2 via gene therapy for bone regeneration has rarely been investigated in diabetic animals. In this study, we aimed to evaluate which cells induce more new bone formation in diabetic animals when cell-based BMP2 gene therapy is applied. For this purpose, we harvested bone marrow stromal cells (BMSCs) twice in the same animal before (non-diabetic BMSCs; nBMSCs) and after diabetes induction (diabetic BMSCs; dBMSCs) using modified bone marrow ablation methods...
November 21, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29157978/stem-cell-based-gene-delivery-mediated-by-cationic-niosomes-for-bone-regeneration
#17
Noha Attia, Mohamed Mashal, Santiago Grijalvo, Ramon Eritja, Jon Zárate, Gustavo Puras, José Luis Pedraz
Bone morphogenetic protein-7(BMP-7) plays a pivotal role in the transformation of mesenchymal stem cells (MSCs) into bone. However, its impact is hampered due to its short half-life. Therefore, gene therapy may be an interesting approach to deliver BMP-7 gene to D1-MSCs. In this manuscript we prepared and characterized niosomes based on cationic lipid 2,3-di(tetradecyloxy)propan-1-amine, combined with polysorbate 80 for gene delivery purposes. Niosomes were characterized and combined initially with pCMS-EGFP reporter plasmid, and later with pUNO1-hBMP-7 plasmid to evaluate osteogenesis differentiation...
November 17, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29145866/calcium-containing-scaffolds-induce-bone-regeneration-by-regulating-mesenchymal-stem-cell-differentiation-and-migration
#18
Rubén Aquino-Martínez, Alcira P Angelo, Francesc Ventura Pujol
BACKGROUND: Osteoinduction and subsequent bone formation rely on efficient mesenchymal stem cell (MSC) recruitment. It is also known that migration is induced by gradients of growth factors and cytokines. Degradation of Ca2+-containing biomaterials mimics the bone remodeling compartment producing a localized calcium-rich osteoinductive microenvironment. The aim of our study was to determine the effect of calcium sulfate (CaSO4) on MSC migration. In addition, to evaluate the influence of CaSO4 on MSC differentiation and the potential molecular mechanisms involved...
November 16, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29143524/injectable-shear-thinning-caso4-fgf-18-incorporated-chitin-plga-hydrogels-enhances-bone-regeneration-in-mice-cranial-bone-defect-model
#19
Sivashanmugam Amirthalingam, Pornkawee Charoenlarp, Sankar Deepthi, ArunKumar Rajendran, Shantikumar V Nair, Sachiko Iseki, Rangasamy Jayakumar
For craniofacial bone regeneration, shear thinning injectable hydrogels are favoured over conventional scaffolds due to their improved defect margin adaptability, easier handling and ability to be injected manually into deeper tissues. The most accepted method, after autografting, is the use of recombinant human BMP-2; however, complications such as inter-individual variations, edema, and poor cost-efficiency in supraphysiological doses have been reported. The endogenous synthesis of BMP-2 is desirable, and a molecule which induces this is FGF-18 since it can up-regulate the BMP-2 expression and positively modulate other osteogenic genes...
November 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29130392/a-novel-hybrid-multichannel-biphasic-calcium-phosphate-granule-based-composite-scaffold-for-cartilage-tissue-regeneration
#20
Albert Jung, Preeti Makkar, Jhaleh Amirian, Byong-Taek Lee
The objective of the present study was to develop a novel hybrid multichannel biphasic calcium phosphate granule (MCG)-based composite system for cartilage regeneration. First, hyaluronic acid-gelatin (HG) hydrogel was coated onto MCG matrix (MCG-HG). Poly(lactic-co-glycolic acid) (PLGA) microspheres was separately prepared and modified with polydopamine subsequent to BMP-7 loading (B). The surface-modified microspheres were finally embedded into MCG-HG scaffold to develop the novel hybrid (MCG-HG-PLGA-PD-B) composite system...
January 1, 2017: Journal of Biomaterials Applications
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