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https://www.readbyqxmd.com/read/28740783/bone-morphogenetic-protein-7-enhances-degradation-of-osteoinductive-bioceramic-implants-in-an-ectopic-model
#1
J Camilo Roldán, Tim Klünter, Peter Schulz, Ulrike Deisinger, Claudius Diez, Waltraud Waiss, Christian Kirschneck, Torsten E Reichert, Rainer Detsch
BACKGROUND: The aim of the present study was to evaluate the degradation pattern of highly porous bioceramics as well as the bone formation in presence of bone morphogenetic protein 7 (BMP-7) in an ectopic site. METHODS: Novel calcium phosphate ceramic cylinders sintered at 1,300°C with a total porosity of 92-94 vol%, 45 pores per inch, and sized 15 mm (Ø) × 5 mm were grafted on the musculus latissimus dorsi bilaterally in 10 Göttingen minipigs: group I (n = 5): hydroxyapatite (HA) versus biphasic calcium phosphate (BCP), a mixture of HA and tricalcium phosphate (TCP) in a ratio of 60/40 wt%; group II (n = 5): TCP versus BCP...
June 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28736908/bmp-7-ameliorates-cobalt-alloy-particle-induced-inflammation-by-suppressing-th17-responses
#2
Fengrong Chen, Ruisong Chen, Haoyuan Liu, Rupeng Sun, Jianming Huang, Zheyuan Huang, Guojian Jian
Metal wear debris has been shown to activate an aseptic osteolytic process that causes failure in total joint arthroplasty (TJA). This osteolysis is characterized by a proinflammatory, self-propagating immune response involving primarily macrophages, dendritic cells, and activated osteoclasts, as well as T cells and B cells. The human bone morphogenic protein (BMP)-7, on the other hand, was shown to promote osteoblast survival, and reversed the downregulation of anabolic Smad proteins and Runx2 following cobalt injury...
July 24, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28735764/bmp-2-7-heterodimer-strongly-induces-bone-regeneration-in-the-absence-of-increased-soft-tissue-inflammation
#3
Takashi Kaito, Tokimitsu Morimoto, Yuki Mori, Sadaaki Kanayama, Takahiro Makino, Shota Takenaka, Yusuke Sakai, Satoru Otsuru, Yoshichika Yoshioka, Hideki Yoshikawa
BACKGROUND CONTEXT: Bone morphogenetic protein (BMP)-2/7 heterodimer is a stronger inducer of bone regeneration than individual homodimers. However, clinical application of its potent bone induction ability may be hampered if its use is accompanied by excessive inflammatory reactions. PURPOSE: We sought to quantitatively evaluate bone induction and inflammatory reactions by BMP heterodimer and corresponding BMP homodimers using ultra-high resolution magnetic resonance imaging (MRI) and micro-computed tomography...
July 20, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28735626/differentiation-of-hmsc-and-hpdlsc-induced-by-pge2-or-bmp-7-in-3d-models
#4
Christina Ern, Tamara Berger, Iris Frasheri, Richard Heym, Reinhard Hickel, Matthias Folwaczny
Regenerative therapies of pathogenic tissue defects are gaining increasing importance in periodontology. Among others, the osteogenic effect of BMP-7 seems to play a major role in the development of teeth and alveolar bone. Human periodontal ligament stem cells (hPDLSC), as well as human mesenchymal stem cells (hMSC), show the ability to differentiate into various types of tissues. Regarding prostaglandin E2, many studies have confirmed that it is involved in the inflammation associated to periodontitis stimulating osteoclasts, which ultimately leads to resorption of tooth supporting bone...
July 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28730696/cd34-cells-seeded-in-collagen-scaffolds-promote-bone-formation-in-a-mouse-calvarial-defect-model
#5
Jens Hertweck, Ulrike Ritz, Hermann Götz, Patrick C Schottel, Pol Maria Rommens, Alexander Hofmann
Bone tissue engineering (BTE) holds promise for managing the clinical problem of large bone defects. However, clinical adoption of BTE is limited due to limited vascularization of constructs, which could be circumvented by pre-cultivation of osteogenic and endothelial derived cells in natural-based polymer scaffolds. However, until now not many studies compared the effect of mono- and cocultures pre-seeded in collagen before implantation. We utilized a mouse calvarial defect model and compared five groups of collagen scaffolds: a negative control of a collagen scaffold alone, a positive control treated with BMP-7, monocultures of either human osteoblasts (hOBs) or CD34+ cells, and a coculture of hOB and CD34(+) cells...
July 21, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28714176/osteogenic-differentiation-of-3d-cultured-mesenchymal-stem-cells-induced-by-bioactive-peptides
#6
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/28688862/programmable-cells-of-monocytic-origin-as-a-source-of-osteochondroprogenitors-effect-of-growth-factors-on-osteogenic-differentiation
#7
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/28637038/synergic-impact-of-vascular-calcification-and-low-autonomic-tone-in-mortality-of-hemodialysis-patients
#8
Hwee-Yeong Ng, Shu-Kai Hsueh, Yueh-Ting Lee, Terry Ting-Yu Chiou, Pei-Chen Huang, Chien-Te Lee
BACKGROUND: Both cardiovascular calcification and autonomic dysfunction are frequently encountered in hemodialysis patients. We aimed to investigate the relationship between cardiovascular calcification and heart rate variability (HRV) and their influence on long-term outcome. METHODS: Seventy-eight hemodialysis patients underwent echocardiogram and radiography of the pelvis and hands to identify valvular and vascular calcification. HRV was evaluated using a commercial machine...
June 22, 2017: Nephron
https://www.readbyqxmd.com/read/28627680/bmp%C3%A2-7-suppresses-excessive-scar-formation-by-activating-the-bmp%C3%A2-7-smad1-5-8-signaling-pathway
#9
Jingdong Guo, Quan Lin, Ying Shao, Li Rong, Duo Zhang
Scarring is the inevitable consequence of wound repair, which may cause significant physical and mental pain to patients when excessive. Bone morphogenetic protein‑7 (BMP‑7) has been proved to inhibit TGF‑β‑induced fibrosis in various tissues including dermal papilla cells. However, the effect of BMP‑7 on hypertrophic scarring, a common proliferative disorder of dermal fibroblasts, has not been determined. To overcome this problem, the present study established a mouse model of thermal injury to investigate the inhibitory effects of BMP‑7 on scar formation...
August 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28566776/infected-nonunion-of-tibia
#10
Milind Madhav Chaudhary
Infected nonunions of tibia pose many challenges to the treating surgeon and the patient. Challenges include recalcitrant infection, complex deformities, sclerotic bone ends, large bone gaps, shortening, and joint stiffness. They are easy to diagnose and difficult to treat. The ASAMI classification helps decide treatment. The nonunion severity score proposed by Calori measures many parameters to give a prognosis. The infection severity score uses simple clinical signs to grade severity of infection. This determines number of surgeries and allows choice of hardware, either external or internal for definitive treatment...
May 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28537650/tendon-healing-induced-by-chemically-modified-mrnas
#11
K Groth, T Berezhanskyy, M K Aneja, J Geiger, M Schweizer, L Maucksch, T Pasewald, T Brill, B Tigani, E Weber, C Rudolph, G Hasenpusch
Tendon disorders are frequent both in human and veterinary medicine with high re-injury rates and unsatisfactory therapeutic treatments. Application of naked, chemically-modified mRNA (cmRNA), encoding for therapeutic proteins, is an innovative approach to address tendon healing. In the current study, we demonstrated that injection of naked cmRNA, diluted in a glucose-containing solution, into tendons resulted in high protein expression in healthy and experimentally-injured tendons. Injection of bone morphogenetic protein 7 (BMP-7)-encoding cmRNA resulted in a significantly higher expression of BMP-7 protein and reduced formation of collagen type III, compared to vehicle control...
May 24, 2017: European Cells & Materials
https://www.readbyqxmd.com/read/28496198/bone-forming-peptide-2-derived-from-bmp-7-enhances-osteoblast-differentiation-from-multipotent-bone-marrow-stromal-cells-and-bone-formation
#12
Hyung Keun Kim, Jun Sik Lee, Ji Hyun Kim, Jong Keun Seon, Kyung Soon Park, Myung Ho Jeong, Taek Rim Yoon
Strategies for efficient osteogenic differentiation and bone formation from stem cells would have clinical applications in treating nonunion fracture healing. Many researchers have attempted to develop adjuvants as specific stimulators of bone formation for therapeutic use in patients with bone resorption. Therefore, development of specific stimulators of bone formation has therapeutic significance in the treatment of osteoporosis. To date, investigations of the mature forms of bone morphogenetic proteins (BMPs) have focused on regulation of bone generation...
May 12, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/28492349/a-novel-compressive-stress-based-osteoarthritis-like-chondrocyte-system
#13
In-Chi Young, Sung-Ting Chuang, Amit Gefen, Wei-Ting Kuo, Chun-Ting Yang, Chia-Hsien Hsu, Feng-Huei Lin
Mechanical stress damage and insufficient self-repair can contribute to osteoarthritis (OA) in the affected joint. As the effects of stress on chondrocyte metabolism can regulate cartilage homeostasis, the specific stress-response condition is therefore a key to the generation of an OA disease model. We aimed to produce a specific stress- and cell-based OA model after evaluating the metabolic responses of chondrocytes in response to a series of static and cyclic compression stressors. A static load exceeding 40 psi initiated extracellular matrix (ECM) degradation through a decrease in the sulphated-glycosaminoglycan (GAG) content, upregulation of catabolic matrix metalloproteinase (MMP)-13 encoding gene expression, and downregulation of the ECM-related aggrecan and type II collagen encoding genes within 24 h...
May 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28489883/bmp-7-induces-apoptosis-in-human-germinal-center-b-cells-and-is-influenced-by-tgf-%C3%AE-receptor-type-i-alk5
#14
Lise K Bollum, Kanutte Huse, Morten P Oksvold, Baoyan Bai, Vera I Hilden, Lise Forfang, Sun Ok Yoon, Sébastien Wälchli, Erlend B Smeland, June H Myklebust
Selection and maturation of B cells into plasma cells producing high-affinity antibodies occur in germinal centers (GC). GCs form transiently in secondary lymphoid organs upon antigen challenge, and the GC reaction is a highly regulated process. TGF-β is a potent negative regulator, but the influence of other family members including bone morphogenetic proteins (BMPs) is less known. Studies of human peripheral blood B lymphocytes showed that BMP-6 suppressed plasmablast differentiation, whereas BMP-7 induced apoptosis...
2017: PloS One
https://www.readbyqxmd.com/read/28458969/bmp-7-preserves-surface-integrity-of-degradable-ceramic-cranioplasty-in-a-g%C3%A3-ttingen-minipig-model
#15
J Camilo Roldán, Peter Schulz, Tim Klünter, Ulrike Deisinger, Claudius Diez, Waltraud Waiss, Christian Kirschneck, Torsten E Reichert, Rainer Detsch
BACKGROUND: The aim of the study was to evaluate the integrity of a craniotomy grafted site in a minipig model using different highly porous calcium phosphate ceramic scaffolds either loaded or nonloaded with bone morphogenetic protein-7 (BMP-7). METHODS: Four craniotomies with a diameter of 15 mm (critical-size defect) were grafted with different highly porous (92-94 vol%) calcium phosphate ceramics [hydroxyapatite (HA), tricalcium phosphate (TCP), and biphasic calcium phosphate (BCP; a mixture of HA and TCP)] in 10 Göttingen minipigs: (a) group I (n = 5): HA versus BCP; (b) group II (n = 5): TCP versus BCP...
March 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28434979/synergistic-effects-of-bmp-2-bmp-6-or-bmp-7-with-human-plasma-fibronectin-onto-hydroxyapatite-coatings-a-comparative-study
#16
Isabelle Brigaud, Rémy Agniel, Johanne Leroy-Dudal, Sabrina Kellouche, Arnaud Ponche, Tahar Bouceba, Natalia Mihailescu, Mihai Sopronyi, Eric Viguier, Carmen Ristoscu, Felix Sima, Ion N Mihailescu, Ana Claudia O Carreira, Mari Cleide Sogayar, Olivier Gallet, Karine Anselme
Design of new osteoinductive biomaterials to reproduce an optimized physiological environment capable of recruiting stem cells and instructing their fate towards the osteoblastic lineage has become a priority in orthopaedic surgery. This work aims at evaluating the bioactivity of BMP combined with human plasma fibronectin (FN/BMP) delivered in solution or coated onto titanium-hydroxyapatite (TiHA) surfaces. Herein, we focus on the comparison of in vitro osteogenic efficacy in mouse C2C12 pre-osteoblasts of three BMP members, namely: BMP-2, BMP-6 and BMP-7...
April 19, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28415516/acceleration-of-bone-regeneration-in-bioactive-glass-gelatin-composite-scaffolds-seeded-with-bone-marrow-derived-mesenchymal-stem-cells-over-expressing-bone-morphogenetic-protein-7
#17
Saeid Kargozar, Seyed Jafar Hashemian, Mansooreh Soleimani, Peiman Brouki Milan, Mohammad Askari, Vahid Khalaj, Ali Samadikuchaksaraie, Sepideh Hamzehlou, Amir Reza Katebi, Noorahmad Latifi, Masoud Mozafari, Francesco Baino
In this research, the osteoinduction effect of a novel variant of bone morphogenetic protein-7 (BMP-7), delivered through bone marrow mesenchymal stem cells (BM-MSCs) seeded on bioactive glass/gelatin nanocomposite scaffolds, was evaluated in a calvarial critical size defect in rats. After being harvested and characterized in vitro, BM-MSCs were infected by a plasmid vector containing BMP-7 encoding gene enriched with a heparin-binding site (B2BMP-7) to assess its osteogenic effects in vivo. The animals were randomly categorized into three groups receiving the scaffold alone (group I), the scaffold seeded with BM-MSCs (group II), and the scaffold seeded with manipulated BM-MSCs (group III)...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28387228/calcium-oxalate-crystals-and-oxalate-induce-an-epithelial-to-mesenchymal-transition-in-the-proximal-tubular-epithelial-cells-contribution-to-oxalate-kidney-injury
#18
Marcia Bastos Convento, Edson Andrade Pessoa, Edgar Cruz, Maria Aparecida da Glória, Nestor Schor, Fernanda Teixeira Borges
TGF-β1 is the main mediator of epithelial-to-mesenchymal transition (EMT). Hyperoxaluria induces crystalluria, interstitial fibrosis, and progressive renal failure. This study analyzed whether hyperoxaluria is associated with TGF-β1 production and kidney fibrosis in mice and if oxalate or calcium oxalate (CaOx) could induce EMT in proximal tubule cells (HK2) and therefore contribute to the fibrotic process. Hyperoxaluria was induced by adding hydroxyproline and ethylene glycol to the mice's drinking water for up to 60 days...
April 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28385008/use-of-stem-cell-sheets-expressing-bone-morphogenetic-protein-7-in-the-management-of-a-nonunion-radial-fracture-in-a-toy-poodle
#19
Jaeyong Song, Yongsun Kim, Oh-Kyeong Kweon, Byung-Jae Kang
A 12-year-old castrated Toy Poodle was referred to Kangwon National University Animal Hospital with an oligotrophic nonunion fracture in the left distal 1/3 of the radius and an intact ulna. After fixation using a locking plate and screws, adipose-derived mesenchymal stem cell sheets expressing bone morphogenetic protein 7 (BMP-7) were transplanted to the fracture site to enhance the healing activity. The fracture healed at 9 weeks after surgery. In the present case, the mesenchymal stem cell sheets expressing BMP-7 promoted bone regeneration and healing in a nonunion fracture...
April 6, 2017: Journal of Veterinary Science
https://www.readbyqxmd.com/read/28342056/formulation-delivery-and-stability-of-bone-morphogenetic-proteins-for-effective-bone-regeneration
#20
REVIEW
Inas El Bialy, Wim Jiskoot, M Reza Nejadnik
Bone morphogenetic proteins (BMPs) are responsible for bone formation during embryogenesis and bone regeneration and remodeling. The osteoinductive action of BMPs, especially BMP-2 and BMP-7, has led to their use in a range of insurmountable treatments where intervention is required for effective bone regeneration. Introduction of BMP products to the market, however, was not without reports of multiple complications and side effects. Aiming for optimization of the therapeutic efficacy and safety, efforts have been focused on improving the delivery of BMPs to lower the administered dose, localize the protein, and prolong its retention time at the site of action...
June 2017: Pharmaceutical Research
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