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Bone Harvesting

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https://www.readbyqxmd.com/read/29346436/bone-marrow-concentrate-promotes-bone-regeneration-with-a-suboptimal-dose-of-rhbmp-2
#1
Kazuhiro Egashira, Yoshinori Sumita, Weijian Zhong, Takashi I, Seigo Ohba, Kazuhiro Nagai, Izumi Asahina
Bone marrow concentrate (BMC), which is enriched in mononuclear cells (MNCs) and platelets, has recently attracted the attention of clinicians as a new optional means for bone engineering. We previously reported that the osteoinductive effect of bone morphogenetic protein-2 (BMP-2) could be enhanced synergistically by co-transplantation of peripheral blood (PB)-derived platelet-rich plasma (PRP). This study aims to investigate whether BMC can effectively promote bone formation induced by low-dose BMP-2, thereby reducing the undesirable side-effects of BMP-2, compared to PRP...
2018: PloS One
https://www.readbyqxmd.com/read/29343888/medial-femoral-condyle-vascularised-corticoperiosteal-graft-a-suitable-choice-for-scaphoid-non-union
#2
Samir Kumta, Sudhir Warrier, Leena Jain, Rani Ummal, Manik Menezes, Shrirang Purohit
Introduction: Scaphoid fractures are not very common and frequently remain undiagnosed, presenting in non-union and persistent wrist pain. Options for scaphoid fracture treatment have been described over several decades, however, none with an optimal solution to achieve union along with good hand function. We describe here, the use of vascularised corticoperiosteal bone grafts from the medial femoral condyle (MFC) as a solution for the difficult problem of scaphoid fracture non-union...
May 2017: Indian Journal of Plastic Surgery: Official Publication of the Association of Plastic Surgeons of India
https://www.readbyqxmd.com/read/29343155/carboxymethyl-chitosan-zinc-coating-for-prevention-of-pin-tract-infection-an-animal-model
#3
Vidmi Taolam Martin, Lei Wang, Rong Zeng, DeQiang You, XianRong Zhang, Welera Haissou Elodie, Bin Yu
BACKGROUND: Pin tract infection is a common problem in orthopedic and traumatology surgery. The aim of this study was to investigate the efficacy of an implant coated with carboxymethyl chitosan-zinc (CMC-Zn2+) in prevention of pin tract infection. MATERIALS AND METHODS: Twenty-four male New Zealand White rabbits were randomized into two equal groups ( n = 12, uncoated and CMC-Zn2+). The implants were colonized with 1 × 106 colony forming units of Staphylococcus aureus and inserted into the lateral right proximal tibia in each rabbit...
January 2018: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/29342321/contributions-of-material-properties-and-structure-to-increased-bone-fragility-for-a-given-bone-mass-in-the-ucd-t2dm-rat-model-of-type-2-diabetes
#4
Claire Acevedo, Meghan Sylvia, Eric Schaible, James L Graham, Kimber L Stanhope, Lionel N Metz, Bernd Gludovatz, Ann V Schwartz, Robert O Ritchie, Tamara N Alliston, Peter J Havel, Aaron J Fields
Adults with type 2 diabetes (T2D) have a higher fracture risk for a given bone quantity, but the mechanisms remain unclear. Using a rat model of polygenic obese T2D, we demonstrate that diabetes significantly reduces whole-bone strength for a given bone mass (micro-CT-derived BMC), and we quantify the roles of T2D-induced deficits in material properties versus bone structure, i.e., geometry and microarchitecture. Lumbar vertebrae and ulnae were harvested from 6-month-old lean Sprague-Dawley rats, obese Sprague-Dawley rats, and diabetic obese UCD-T2DM rats (diabetic for 69 ± 7 days; blood glucose >200 mg/dl)...
January 17, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29339080/prostate-cancer-disseminated-tumor-cells-are-rarely-detected-in-the-bone-marrow-of-localized-patients-undergoing-radical-prostatectomy-across-multiple-rare-cell-detection-platforms
#5
Heather J Chalfin, Stephanie A Glavaris, Paymaneh D Malihi, Jamie M Sperger, Michael A Gorin, Changxue Lu, C Rory Goodwin, Yan Chen, Emily A Caruso, Ruth Dumpit, Peter Kuhn, Joshua M Lang, Peter S Nelson, Jun Luo, Kenneth J Pienta
PURPOSE: Prostate circulating tumor cells escape into the peripheral blood and enter the bone marrow as disseminated tumor cells, representing an early step before conventionally detectable metastasis. It is unclear how frequently this occurs in localized disease, and existing detection methods rely on epithelial markers with low specificity and sensitivity. Here we employed multiple methodologies of disseminated tumor cell detection in bone marrow harvested at radical prostatectomy. MATERIALS AND METHODS: Bone marrow was harvested from 208 clinically localized patients, 16 controls, and 5 metastatic patients, with peripheral blood from 37 metastatic patients...
January 12, 2018: Journal of Urology
https://www.readbyqxmd.com/read/29338084/importance-of-b-cells-to-development-of-tregs-and-prolongation-of-tissue-allograft-survival-in-recipients-receiving-autologous-bone-marrow-transplantation
#6
Reginald M Gorczynski, Kaveh Farrokhi, Christopher Gorczynski, Hassan Sadozai, Fang Zhu, Ismat Khatri
We previously showed that congenic bone marrow transplantation (BMTx) post myeloablation augmented tissue allograft survival in association with increased Tregs of both host and bone marrow donor origin. Regulatory B cells (Bregs) can also modulate T cell immunity and B cells may be implicated in the development of Tregs. Accordingly, we explored the effect of B cell depletion in vivo on augmented graft survival post BMTx. C57BL/6 mice received BALB/c skin allografts followed 7d later by myeloablation using cyclophosphamide and busulphan...
January 16, 2018: Immunology
https://www.readbyqxmd.com/read/29334405/high-resolution-dental-mri-for-planning-palatal-graft-surgery-a-clinical-pilot-study
#7
Tim Hilgenfeld, Thorsten Kästel, Alexander Heil, Peter Rammelsberg, Sabine Heiland, Martin Bendszus, Franz Sebastian Schwindling
AIM: To evaluate whether high-resolution, non-contrast-enhanced dental MRI can be used for accurate determination of palatal-masticatory-mucosa-thickness (PMMT) and to locate the greater palatal artery (GPA). MATERIALS AND METHODS: In five volunteers (4 males, 1 female; mean age 30.2±0.4 years) two independent raters measured PMMT by use of dental MRI in 180 positions. For comparison, clinical bone sounding was performed. The GPA was identified in time-of-flight (TOF) angiography and MSVAT-SPACE-prototype sequence...
January 15, 2018: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/29328886/osteochondral-graft-size-is-significantly-associated-with-increased-force-and-decreased-chondrocyte-viability
#8
Brian E Walczak, Matthew S Nies, Darrin J Trask, Scott Hetzel, Patrick J Roney, Matthew W Squire, Geoffrey S Baer
BACKGROUND: Insertion force has been shown to significantly reduce chondrocyte viability during osteochondral allograft transplantation. How graft size influences the required insertion force and chondrocyte viability has yet to be determined. Hypothesis/Purpose: The purpose was to characterize how graft size influences insertion force requirements and chondrocyte viability during osteochondral transplantation. The hypothesis was that larger grafts would require greater force and reduce chondrocyte viability...
January 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29324934/stem-cells-therapy-the-future-in-the-management-of-systemic-sclerosis-a-case-report
#9
Jung In Song, Silvanie Volz, Maria Eirini Liodaki, Peter Mailänder, Konstantinos Kalousis
OBJECTIVE: Systemic sclerosis (SSc) is a connective tissue disorder of unknown etiology, with heterogeneous clinical manifestations and chronic and often progressive course. The diffuse cutaneous form of SSc (dcSSc) is characterized by thickening of the skin (scleroderma) and distinctive involvement of multiple internal organs. Patients with limited cutaneous SSc (lcSSc) generally have long-standing Raynaud's phenomenon before other manifestations of SSc appear. Over the last decade the Interest of adipose-derived cell therapy in regenerative medicine has increased continuously...
September 2017: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/29321630/engineered-mesenchymal-stem-cell-sheets-patches-prevents-postoperative-pancreatic-leakage-in-a-rat-model
#10
Seong-Ryong Kim, Hye-Jin Yi, Yu Na Lee, Ji Yoon Park, Robert M Hoffman, Teruo Okano, In Kyong Shim, Song Cheol Kim
Post-operative pancreatic fistula (POPF) following pancreatic resection is a life-threatening surgical complication. Cell sheets were prepared and harvested using temperature-responsive culture dishes and transplanted as patches to seal POPF. Two different mesenchymal stem cell (MSC) sheets were compared in terms of the preventative ability for pancreatic leakage in a rat model. Both rat adipose-derived stem cell (rADSC) and bone marrow-derived stem cell (rBMSC) sheets were transplanted. Those rADSC and rBMSC sheets are created without enzymes and thus maintained their cell-cell junctions and adhesion proteins with intact fibronectin on the basal side, as well as characteristics of MSCs...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29319733/biomechanic-and-histologic-analysis-of-fibroblastic-effects-of-tendon-to-bone-healing-by-transforming-growth-factor-%C3%AE-1-tgf-%C3%AE-1-in-rotator-cuff-tears
#11
Chong Zhang, Yu-Jie Liu
PURPOSE: To evaluate the effect of transforming growth factor β1 (TGF-β1) on tendon-to-bone reconstruction of rotator cuff tears. METHODS: Seventy-two rat supraspinatus tendons were transected and reconstructed in situ. At 8 and 16 weeks, specimens of three groups; that is control, L-dose (low dose), and H-dose (high dose) were harvested and underwent a biomechanical test to evaluate the maximum load and stiffness values. Histology sections of the tendon-to-bone interface were identified by hematoxylin-eosin or Masson trichrome stain...
December 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/29317369/mesenchymal-stem-cell-derived-extracellular-matrix-enhances-chondrogenic-phenotype-of-and-cartilage-formation-by-encapsulated-chondrocytes-in-vitro-and-in-vivo
#12
Yuanheng Yang, Hang Lin, He Shen, Bing Wang, Guanghua Lei, Rocky S Tuan
Mesenchymal stem cell derived extracellular matrix (MSC-ECM) is a natural biomaterial with robust bioactivity and good biocompatibility, and has been studied as a scaffold for tissue engineering. In this investigation, we tested the applicability of using decellularized human bone marrow derived MSC-ECM (hBMSC-ECM) as a culture substrate for chondrocyte expansion in vitro, as well as a scaffold for chondrocyte-based cartilage repair. hBMSC-ECM deposited by hBMSCs cultured on tissue culture plastic (TCP) was harvested, and then subjected to a decellularization process to remove hBMSCs...
January 6, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29317360/autologous-bone-harvest-in-anterior-cervical-spine-surgery-a-quantitative-and-qualitative-in-vitro-analysis-of-cadaveric-tissue
#13
Emre Yilmaz
No abstract text is available yet for this article.
January 6, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29311696/reliable-landmarks-for-precise-topographical-analyses-of-pathological-structural-changes-of-the-ovine-tibial-plateau-in-2-d-and-3-d-subspaces
#14
Tamás Oláh, Jan Reinhard, Liang Gao, Lars K H Goebel, Henning Madry
Selecting identical topographical locations to analyse pathological structural changes of the osteochondral unit in translational models remains difficult. The specific aim of the study was to provide objectively defined reference points on the ovine tibial plateau based on 2-D sections of micro-CT images useful for reproducible sample harvesting and as standardized landmarks for landmark-based 3-D image registration. We propose 5 reference points, 11 reference lines and 12 subregions that are detectable macroscopically and on 2-D micro-CT sections...
January 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29304874/total-arterial-revascularization-in-patients-with-acute-myocardial-infarction-feasibility-and-outcomes
#15
Philippe Grieshaber, Lukas Oster, Tobias Schneider, Victoria Johnson, Coskun Orhan, Peter Roth, Bernd Niemann, Andreas Böning
BACKGROUND: In acute situations such as acute myocardial infarction (AMI) with indication for coronary artery bypass grafting (CABG), total arterial revascularization (TAR) is often rejected in favour of saphenous vein (SV) grafting, which is assumed to allow for quicker vessel harvesting, a simpler anastomosis technique, and thus quicker revascularization and fewer bleeding complications. The aim of this study was to evaluate whether reluctance to apply TAR in AMI is still justified from a technical point of view in the current era and whether superiority of TAR results is also evident in emergency patients with AMI undergoing CABG...
January 5, 2018: Journal of Cardiothoracic Surgery
https://www.readbyqxmd.com/read/29303912/transforming-growth-factor-%C3%AE-and-bone-morphogenetic-protein-2-regulation-of-microrna-200-family-in-chronic-pancreatitis
#16
Peter Yu, Ka Liu, Xuxia Gao, Harry Karmouty-Quintana, Jennifer M Bailey, Yanna Cao, Tien C Ko
OBJECTIVES: To investigate regulation of microRNA (miR)-200 family (a, b, c, 141, and 429) in chronic pancreatitis (CP). This was accomplished by examining miR-200 family levels in a mouse model in vivo and their regulation in pancreatic cells in vitro. METHODS: Chronic pancreatitis was induced by cerulein for 4 weeks (50 μg/kg, 5 hourly intraperitoneal injections/day, and 3 days/week). Control mice received normal saline. The pancreata were harvested for fibrosis assessment by Sirius red staining and for miRNA, collagen, and fibronectin levels by quantitative PCR...
January 5, 2018: Pancreas
https://www.readbyqxmd.com/read/29301014/pedicled-vascularized-bone-grafts-for-posterior-occipitocervical-and-cervicothoracic-fusion-a-cadaveric-feasibility-study
#17
Michael A Bohl, Michael A Mooney, Joshua S Catapano, Kaith K Almefty, Jay D Turner, Steve W Chang, Mark C Preul, Edward M Reece, U Kumar Kakarla
BACKGROUND: Arthrodesis is critical for achieving favorable outcomes in reconstructive spine surgery. Vascularized bone grafts (VBGs) have been successfully used to augment fusion rates in a variety of skeletal pathologies, and pedicled VBG has numerous advantages over free transfer VBG. Pedicled VBG has not previously been described for the posterior occipitocervicothoracic spine. OBJECTIVE: To identify, describe, and assess potential donor sites for pedicled VBGs from occiput to T12 using a cadaver model and to describe important technical considerations for graft harvest and placement...
December 30, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29298566/osteochondral-interface-stiffening-in-mandibular-condylar-osteoarthritis
#18
J Zhang, L Liao, J Zhu, X Wan, M Xie, H Zhang, M Zhang, L Lu, H Yang, D Jing, X Liu, S Yu, X L Lu, C Chen, Z Shan, M Wang
Osteoarthritis (OA) of the temporomandibular joint (TMJ) is associated with dental biomechanics. A major change during OA progression is the ossification of the osteochondral interface. This study investigated the formation, radiological detectability, and mechanical property of the osteochondral interface at an early stage, the pathogenesis significance of which in OA progression is of clinical interest and remains elusive for the TMJ. Unilateral anterior crossbite (UAC) was performed on 6-wk-old rats as we previously reported...
December 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/29297832/detection-of-ranavirus-using-bone-marrow-harvested-from-mortality-events-in-eastern-box-turtles-terrapene-carolina-carolina
#19
Claire E Butkus, Matthew C Allender, Christopher A Phillips, Laura A Adamovicz
The causes of free-living chelonian mortality events are often unknown because of infrequent recovery of remains and rapid postmortem decomposition. This study describes a technique to harvest bone marrow and detect frog virus 3-like ranavirus (FV3) using quantitative polymerase chain reaction in skeletonized eastern box turtles ( Terrapene carolina carolina) ( N = 87), and assesses agreement with concurrent perimortem samples ( N = 14). FV3 was detected in bone marrow samples from 12 turtle shells (14%). Three of 14 turtles had detectable FV3 loads in both bone marrow and perimortem samples, two turtles had detectable FV3 in bone marrow only, and nine turtles tested FV3 negative in both bone marrow and concurrent perimortem samples...
December 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/29296840/two-distinct-cxcr4-antagonists-mobilize-progenitor-cells-in-mice-by-different-mechanisms
#20
Andia N Redpath, Moïra François, Suet-Ping Wong, Dominique Bonnet, Sara M Rankin
Pharmacological mobilization of hematopoietic progenitor cells (HPCs) is used clinically to harvest HPCs for bone marrow transplants. It is now widely accepted that the CXCR4:CXCL12 chemokine axis plays a critical role in the retention of HPCs in the bone marrow, and CXCR4 antagonists have been developed for their mobilization. The first of this class of drugs to be US Food and Drug Administration-approved was the bicyclam AMD3100. In addition to mobilizing HPCs and leukocytes in naïve mice, AMD3100 has been shown to mobilize mesenchymal progenitor cells (MPCs) in vascular endothelial growth factor (VEGF-A) pretreated mice...
October 10, 2017: Blood Advances
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