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https://www.readbyqxmd.com/read/29785221/cocrmo-alloy-vs-uhmwpe-particulate-implant-debris-induces-sex-dependent-aseptic-osteolysis-responses-in-vivo-using-a-murine-model
#1
Stefan Landgraeber, Lauryn Samelko, Kyron McAllister, Sebastian Putz, Joshua J Jacobs, Nadim James Hallab
Background: The rate of revision for some designs of total hip replacements due to idiopathic aseptic loosening has been reported as higher for women. However, whether this is environmental or inherently sex-related is not clear. Objective: Can particle induced osteolysis be sex dependent? And if so, is this dependent on the type of implant debris ( e.g . metal vs polymer)? The objective of this study was to test for material dependent inflammatory osteolysis that may be linked to sex using CoCrMo and implant grade conventional polyethylene (UHMWPE), using an in vivo murine calvaria model...
2018: Open Orthopaedics Journal
https://www.readbyqxmd.com/read/29781925/osteo-odonto-keratoprosthesis-in-severe-thermal-and-chemical-injuries
#2
Alfonso Vasquez-Perez, Mehran Zarei-Ghanavati, Venkata Avadhanam, Christopher Liu
PURPOSE: To report the results of osteo-odonto-keratoprosthesis (OOKP) surgery in patients who sustained severe chemical and thermal injuries. METHODS: This is a noncomparative retrospective case series of 14 patients who underwent OOKP surgery between 2001 and 2016 at the Sussex Eye Hospital, Brighton, UK, because of severe chemical and thermal injuries RESULTS:: OOKP surgery was performed in 14 eyes of 14 patients. Eight patients (57%) sustained thermal injuries and 6 patients (43%) chemical injuries...
May 16, 2018: Cornea
https://www.readbyqxmd.com/read/29780355/therapeutic-interference-with-vascular-calcification-lessons-from-klotho-hypomorphic-mice-and-beyond
#3
REVIEW
Florian Lang, Christina Leibrock, Lisann Pelzl, Meinrad Gawaz, Burkert Pieske, Ioana Alesutan, Jakob Voelkl
Medial vascular calcification, a major pathophysiological process associated with cardiovascular disease and mortality, involves osteo-/chondrogenic transdifferentiation of vascular smooth muscle cells (VSMCs). In chronic kidney disease (CKD), osteo-/chondrogenic transdifferentiation of VSMCs and, thus, vascular calcification is mainly driven by hyperphosphatemia, resulting from impaired elimination of phosphate by the diseased kidneys. Hyperphosphatemia with subsequent vascular calcification is a hallmark of klotho-hypomorphic mice, which are characterized by rapid development of multiple age-related disorders and early death...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29780198/sva-shape-variation-analyzer
#4
Priscille de Dumast, Clement Mirabel, Beatriz Paniagua, Marilia Yatabe, Antonio Ruellas, Nina Tubau, Martin Styner, Lucia Cevidanes, Juan C Prieto
Temporo-mandibular osteo arthritis (TMJ OA) is characterized by progressive cartilage degradation and subchondral bone remodeling. The causes of this pathology remain unclear. Current research efforts are concentrated in finding new biomarkers that will help us understand disease progression and ultimately improve the treatment of the disease. In this work, we present Shape Variation Analyzer (SVA), the goal is to develop a noninvasive technique to provide information about shape changes in TMJ OA. SVA uses neural networks to classify morphological variations of 3D models of the mandibular condyle...
February 2018: Proceedings of SPIE
https://www.readbyqxmd.com/read/29778409/extensive-periosteal-new-bone-formation-in-a-skeleton-from-post-medieval-chichester-england-a-probable-case-of-metastatic-prostatic-carcinoma
#5
Carolyn Rando, Tony Waldron
An elderly male skeleton from a site in Chichester, UK, was found with a widespread periosteal reaction, principally affecting the axial skeleton and the pelvis. Radiography showed the presence of sclerosing infiltrates, mainly involving the lumbar vertebrae and pelvis. The differential diagnosis is discussed, reaching the conclusion that hypertrophic osteo-arthopathy (HOA) is the only reasonable alternative condition likely to produce such a widespread periosteal reaction as found here. HOA does not produce secondary deposits in the skeleton, however, and we conclude that his is most likely a case of prostatic carcinoma...
July 29, 2017: International Journal of Paleopathology
https://www.readbyqxmd.com/read/29773237/application-of-a-resin-handle-for-preparation-of-lamina-for-osteo-odontokeratoprosthesis
#6
A Enomoto, K Matsunaga, M Fukuda, Y Shimomura, S Hamada
No abstract text is available yet for this article.
May 14, 2018: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/29767832/cancer-survivors-exhibit-a-different-relationship-between-muscle-strength-and-health-related-quality-of-life-fatigue-compared-to-healthy-subjects
#7
S Morishita, A Tsubaki, J B Fu, Y Mitobe, H Onishi, T Tsuji
We investigated the difference in relationship between muscle strength and quality of life (QOL)/fatigue in long-term cancer survivors and healthy subjects. Thirty-six cancer survivors and 29 healthy subjects were assessed for body composition and bone status at the calcaneus using the Osteo Sono Assessment Index. Muscle strength was evaluated via handgrip and knee extensor strength. Health-related QOL was assessed using the Medical Outcome Study 36-item Short-Form Health Survey. Fatigue was measured using the brief fatigue inventory...
May 16, 2018: European Journal of Cancer Care
https://www.readbyqxmd.com/read/29760957/simulated-microgravity-induces-a-cellular-regression-of-the-mature-phenotype-in-human-primary-osteoblasts
#8
Magda Gioia, Anna Michaletti, Manuel Scimeca, Mario Marini, Umberto Tarantino, Lello Zolla, Massimo Coletta
Decreased mechanical loading on bones, such as prolonged bed rest and microgravity during space flights, leads to the development of an osteoporotic-like phenotype. Although osteoblast hypo-functionality is reported to be involved in the progression of bone pathological conditions, the cellular mechanisms of this process remain largely unknown. The combined application of mass spectrometry "-omics" and histochemical and ultrastructural approaches have been employed to investigate the effects of the gravitational unloading on human bone-cell biology...
2018: Cell Death Discovery
https://www.readbyqxmd.com/read/29757956/osteogenic-differentiation-modulates-the-cytokine-chemokine-and-growth-factor-profile-of-ascs-and-shed
#9
Federico Mussano, Tullio Genova, Sara Petrillo, Ilaria Roato, Riccardo Ferracini, Luca Munaron
Great efforts have been made to improve bone regeneration techniques owing to a growing variety of sources of stem cells suitable for autologous transplants. Specifically, adipose-derived stem cells (ASCs) and stems cells from human exfoliated deciduous teeth (SHED) hold great potential for bone tissue engineering and cell therapy. After a preliminary characterization of the main biomolecules ASCs and SHED released in their conditioned media, cells were kept both in normal and osteo-inducing conditions. Conventional assays were performed to prove their osteogenic potential such as quantitative real-time polymerase chain reaction (qRT-PCR) (for RUNX-2, collagen type I, osteopontin and osteonectin), alkaline phosphatase activity, osteocalcin production, and von Kossa staining...
May 14, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29753194/targeting-wnt-signaling-in-the-treatment-of-osteoporosis
#10
REVIEW
Roland Baron, Francesca Gori
Osteoporosis is a widespread chronic disease characterized by low bone density, altered microstructure and bone fragility, leading to low impact fractures in affected individuals. The discovery of a few mutations that cause extremely rare human diseases has identified the WNT signaling pathway as a candidate for therapeutic intervention aimed at increasing bone mass and strength. In particular, inhibition of sclerostin, a WNT antagonist secreted by osteocytes, has proven in clinical trials to be a very efficient osteo-anabolic approach...
May 9, 2018: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/29750603/differential-gene-expression-patterns-in-vein-regions-susceptible-versus-resistant-to-neointimal-hyperplasia
#11
Sun Hyung Kwon, Li Li, Christi M Terry, Yan-Ting Shiu, Philip J Moos, Brett A Milash, Alfred K Cheung, Donald K Blumenthal
Arteriovenous hemodialysis graft (AVG) stenosis results in thrombosis and AVG failure, and develops chiefly as a consequence of localized neointimal hyperplasia (NH) formation in the vein-graft anastomosis region. The vein region just downstream of the vein-graft anastomosis (herein termed proximal vein region) is relatively resistant to NH. Prevention of AVG stenosis has been ineffective due in part to our limited understanding of the molecular processes involved in NH formation. We hypothesized that the gene expression profiles of the NH-prone and NH-resistant regions will be different from each other after graft placement, and analysis of their genomic profiles may yield therapeutic targets to prevent AVG stenosis...
May 11, 2018: Physiological Genomics
https://www.readbyqxmd.com/read/29747030/the-osteogenic-inflammatory-and-osteo-immunomodulatory-performances-of-biomedical-ti-ta-metal-metal-composite-with-ca-and-si-containing-bioceramic-coatings
#12
Qianli Huang, Xuezhong Li, Tarek A Elkhooly, Shenghang Xu, Xujie Liu, Qingling Feng, Hong Wu, Yong Liu
It is known that good mechanical properties, low modulus to reduce stress-shielding effect, favorable osteogenic activity and limited inflammatory response are critical factors for orthopedic implants to induce excellent osteointegration. In this study, Ti-20% Ta metal-metal composite (referred as Ti-Ta) which consisted of Ti- and Ta-rich phases was fabricated via the strategy of powder metallurgy. Micro-arc oxidation (MAO) was employed to modify the surface of Ti-Ta composite. The surfaces of Ti-Ta composite after MAO treatment at an applied voltage of 250 (referred as MAO-250 V) or 300 V (referred as MAO-300 V) exhibited three distinct zones with significantly different morphological features and surface chemistry...
May 5, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29746183/msx2-marks-spatially-restricted-populations-of-mesenchymal-precursors
#13
N Sakagami, Y Matsushita, S Syklawer-Howle, H M Kronenberg, W Ono, N Ono
Craniofacial development requires a set of patterning codes that define the identities of postmigratory mesenchymal cells in a region-specific manner, in which locally expressed morphogens, including fibroblast growth factors (FGFs) and bone morphogenetic proteins (BMPs), provide instructive cues. Msx2, a bona fide target of BMP signaling, is a transcription factor regulating Runx2 and osterix (Osx), whose mutations are associated with cranial deformities in humans. Here we show that Msx2 defines osteo-chondro precursor cells in specific regions of the craniofacial mesenchyme at the postmigratory stage, particularly in the mandibular process and the posterior cranial vault...
May 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29740080/interleukin-17-enhances-bone-morphogenetic-protein-2-induced-ectopic-bone-formation
#14
M Croes, M C Kruyt, W M Groen, K M A van Dorenmalen, W J A Dhert, F C Öner, J Alblas
Interleukin 17 (IL-17) stimulates the osteogenic differentiation of progenitor cells in vitro through a synergy with bone morphogenetic protein (BMP)-2. This study investigates whether the diverse responses mediated by IL-17 in vivo also lead to enhanced BMP-2-induced bone formation. Since IL-17 is known to induce osteoclastogenesis, we studied the interactions between IL-17 and BMP-2 in ceramic scaffolds either or not carrying a coating with the bisphosphonate zoledronic acid (ZOL). Histological evaluation revealed that IL-17 alone did not induce any osteoclasts at day 10...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29736776/3d-fiber-deposited-polymeric-scaffolds-for-external-auditory-canal-wall
#15
Carlos Mota, Mario Milazzo, Daniele Panetta, Luisa Trombi, Vera Gramigna, Piero A Salvadori, Stefano Giannotti, Luca Bruschini, Cesare Stefanini, Lorenzo Moroni, Stefano Berrettini, Serena Danti
The external auditory canal (EAC) is an osseocartilaginous structure extending from the auricle to the eardrum, which can be affected by congenital, inflammatory, and neoplastic diseases, thus reconstructive materials are needed. Current biomaterial-based approaches for the surgical reconstruction of EAC posterior wall still suffer from resorption (biological) and extrusion (synthetic). In this study, 3D fiber deposited scaffolds based on poly(ethylene oxide terephthalate)/poly(butylene terephthalate) were designed and fabricated to replace the EAC wall...
May 7, 2018: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/29732529/osteostimulation-scaffolds-of-stem-cells-bmp-7-derived-peptide-decorated-alginate-porous-scaffolds-promote-the-aggregation-and-osteo-differentiation-of-human-mesenchymal-stem-cells
#16
Yue Yang, Zuyuan Luo, Ying Zhao
The scaffolds for stem cell-based bone tissue engineering should hold the ability to guide stem cells osteo-differentiating. Otherwise, stem cells will differentiate into unwanted cell types or will form tumors in vivo. Alginate, a natural polysaccharide with great biocompatibility, was widely used in biomedical applications. However, the limited bioactivity and poor osteogenesis capability of pristine alginate hampered its further application in tissue engineering. In this work, a bone forming peptide-1 (BFP-1), derived from bone morphogenetic protein-7, was grafted to alginate polymer chains to prepare peptide-decorated alginate porous scaffolds (pep-APS) for promoting osteo-differentiation of human mesenchymal stem cells (hMSCs)...
May 6, 2018: Biopolymers
https://www.readbyqxmd.com/read/29731871/co-implantation-of-bone-marrow-mesenchymal-stem-cells-and-chondrocytes-increase-the-viability-of-chondrocytes-in-rat-osteo-chondral-defects
#17
Zhi Zhao, Xinshe Zhou, Jianzhong Guan, Min Wu, Jiansheng Zhou
Replacement of chondrocytes by adult stem cells was believed to improve the performance of autologous chondrocytes transplantation, since less chondrocytes were needed. Previous studies have demonstrated that the increased cartilage production in pellet co-cultures of chondrocytes and bone marrow mesenchymal stem cells (BMSCs) is due to the trophic effects of the MSC by stimulating chondrocyte proliferation and matrix production. However, the destination of MSCs or chondrocytes after implanted in osteo-chondral defects is not clear...
May 2018: Oncology Letters
https://www.readbyqxmd.com/read/29705535/associations-of-myeloid-hematological-diseases-of-the-elderly-with-osteoporosis-a-longitudinal-analysis-of-routine-health-care-data
#18
Thomas Datzmann, Freya Trautmann, Falko Tesch, Anna Mies, Lorenz C Hofbauer, Uwe Platzbecker, Jochen Schmitt
BACKGROUND: Myelodysplastic Syndromes (MDS) and Acute Myeloid Leukemia (AML) are hematological stem cell diseases mainly of the elderly. Studies indicate a close relationship between bone metabolism and hematopoietic stem cells within the osteo-hematopoietic niche. However, it remains unclear how the disturbed interaction within the osteo-hematopoietic niche affects bone homeostasis in MDS and AML patients. METHODS: We utilized data of a large German statutory health insurance of approximately 2 million persons living in the German federal state of Saxony...
April 21, 2018: Leukemia Research
https://www.readbyqxmd.com/read/29692560/osteo-odonto-keratoprosthesis-innovative-dental-and-ophthalmic-blending
#19
REVIEW
Jaswinder Kaur
Corneal diseases are among the major causes of global blindness, secondary to cataract. osteo-odonto keratoprosthesis (OOKP) is the ideal treatment for patients with end-stage inflammatory corneal diseases where a portion of tooth along with bone is used to support an optical cylinder to restore vision in such patients. OOKP surgery requires multidisciplinary approach involving dentists, ophthalmologists, and radiologists. Very less is known in dentistry about the role of the periodontium in the field of ophthalmology...
April 2018: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/29689558/fibulin-3-attenuates-phosphate-induced-vascular-smooth-muscle-cell-calcification-by-inhibition-of-oxidative-stress
#20
Trang T D Luong, Nadeshda Schelski, Beate Boehme, Manousos Makridakis, Antonia Vlahou, Florian Lang, Burkert Pieske, Ioana Alesutan, Jakob Voelkl
BACKGROUND/AIMS: Fibulin-3, an extracellular matrix glycoprotein, inhibits vascular oxidative stress and remodeling in hypertension. Oxidative stress is prevalent in chronic kidney disease (CKD) patients and is an important mediator of osteo-/chondrogenic transdifferentiation and calcification of vascular smooth muscle cells (VSMCs) during hyperphosphatemia. Therefore, the present study explored the effects of Fibulin-3 on phosphate-induced vascular calcification. METHODS: Experiments were performed in primary human aortic smooth muscle cells (HAoSMCs) treated with control or with phosphate without or with additional treatment with recombinant human Fibulin-3 protein or with hydrogen peroxide as an exogenous source of oxidative stress...
April 18, 2018: Cellular Physiology and Biochemistry
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