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composite tissue allograft

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https://www.readbyqxmd.com/read/29762195/functional-outcomes-and-complications-after-oncologic-reconstruction-of-the-proximal-humerus
#1
Sjoerd Nota, Teun Teunis, Joost Kortlever, Marco Ferrone, John Ready, Mark Gebhardt, Kevin Raskin, Francis Hornicek, Joseph Schwab, Santiago Lozano Calderon
BACKGROUND: No consensus exists on the best method of articular reconstruction in patients who require proximal humerus resection for the management of primary bone sarcomas, soft-tissue sarcomas extending into the bone, benign and locally aggressive primary bone tumors, and metastatic disease. METHODS: We identified patients from two institutions who underwent wide resection of the proximal humerus along with oncologic reconstruction using osteoarticular allografts (OAs), endoprostheses, or allograft-prosthesis composites...
June 1, 2018: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/29754071/aging-increases-susceptibility-to-ovarian-cancer-metastasis-in-murine-allograft-models-and-alters-immune-composition-of-peritoneal-adipose-tissue
#2
Elizabeth A Loughran, Annemarie K Leonard, Tyvette S Hilliard, Ryan C Phan, Madeleine G Yemc, Elizabeth Harper, Emma Sheedy, Yuliya Klymenko, Marwa Asem, Yueying Liu, Jing Yang, Jeff Johnson, Laura Tarwater, Zonggao Shi, Matthew Leevy, Matthew J Ravosa, M Sharon Stack
Ovarian cancer, the most deadly gynecological malignancy in U.S. women, metastasizes uniquely, spreading through the peritoneal cavity and often generating widespread metastatic sites before diagnosis. The vast majority of ovarian cancer cases occur in women over 40 and the median age at diagnosis is 63. Additionally, elderly women receive poorer prognoses when diagnosed with ovarian cancer. Despite age being a significant risk factor for the development of this cancer, there are little published data which address the impact of aging on ovarian cancer metastasis...
May 10, 2018: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/29746324/extracorporeal-perfusion-in-vascularized-composite-allotransplantation-current-concepts-and-future-prospects
#3
Maximilian Kueckelhaus, Flemming Puscz, Alexander Dermietzel, Mehran Dadras, Sebastian Fischer, Nicco Krezdorn, Bohdan Pomahac, Tobias Hirsch
Severe injuries of the face and limbs remain a major challenge in today's reconstructive surgery. Vascularized composite allotransplantation (VCA) has emerged as a promising approach to restore these defects. Yet, there are major obstacles preventing VCA from broad clinical application. Two key restrictions are (1) the graft's limited possible ischemia time, keeping the potential donor radius extremely small, and (2) the graft's immunogenicity, making extensive lifelong monitoring and immunosuppressive treatment mandatory...
June 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29722119/development-of-mesoporous-bioactive-glass-nanoparticles-and-its-use-in-bone-tissue-engineering
#4
REVIEW
Chee Hoe Kong, Chris Steffi, Zhilong Shi, Wilson Wang
The incidence of bone disorders, from trauma, tissue degeneration due to ageing, pathological conditions to cancer, has been increasing. The pursuit for bone graft substitutes to assist in regenerating large bone defects is ever growing as a result of the shortage in conventional autografts and allografts, in addition to the associated risks of disease transmission. However, the use of alloplastic biomaterials is limited in clinical settings, as further investigations are required to address the properties of synthetic grafts to mimic the native bone tissue and deliver desirable biomolecules to facilitate bone regeneration...
May 2, 2018: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29649641/hydrogel-derived-from-porcine-decellularized-nerve-tissue-as-a-promising-biomaterial-for-repairing-peripheral-nerve-defects
#5
Tao Lin, Sheng Liu, Shihao Chen, Shuai Qiu, Zilong Rao, Jianghui Liu, Shuang Zhu, Liwei Yan, Haiquan Mao, Qingtang Zhu, Daping Quan, Xiaolin Liu
Decellularized matrix hydrogels derived from tissues or organs have been used for tissue repair due to their biocompatibility, tunability, and tissue-specific extracellular matrix (ECM) components. However, the preparation of decellularized peripheral nerve matrix hydrogels and their use to repair nerve defects have not been reported. Here, we developed a hydrogel from porcine decellularized nerve matrix (pDNM-G), which was confirmed to have minimal DNA content and retain collagen and glycosaminoglycans content, thereby allowing gelatinization...
April 9, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29628687/megaprosthesis-versus-allograft-prosthesis-composite-for-massive-skeletal-defects
#6
REVIEW
Deepak Gautam, Rajesh Malhotra
Massive skeletal defects are encountered in the setting of tumors necessitating excision, failed total hip arthroplasty with periprosthetic bone loss, periprosthetic fracture, complex trauma, multiple failed osteosynthesis and infection. Reconstruction of the segmental defects poses a tremendous challenge to the orthopaedic surgeons. The goal of osseous reconstruction of these defects is to restore the bone length and function. Currently the most commonly employed methods for reconstruction are either a megaprosthesis or an Allograft Prosthesis Composite (APC)...
January 2018: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/29595532/development-of-an-ex-situ-limb-perfusion-system-for-a-rodent-model
#7
Emre Gok, Fares Alghanem, Ruth Moon, Erin Guy, Alvaro Rojas-Pena, Robert H Bartlett, Kagan Ozer
Ex-situ perfusion (ESP) is a promising method in preserving vascularized composite tissue allografts (VCAs) with potential to widen donor procurement to larger geographic areas. To optimize the method of preservation, we developed a small animal model to conduct biomolecular investigations. Twenty rat hind limbs (18.2 ± 1.3 g) were procured and connected to our custom-made ESP system. Perfusion pressure and flow parameters were measured with hourly blood gas analysis under near-normothermic (30-35˚C) conditions...
March 26, 2018: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29561493/lacrimal-apparatus-procurement-in-face-transplantation
#8
Asif Hasan, Colin Maciver, Gaoussou Toure, Jean-Paul Meningaud
The aesthetic outcome of a well-planned and executed vascularized composite tissue face allotransplant is unquestionable; however, complete functional restoration is necessary. The authors studied the possibility of restoring tear duct function in face transplant recipients. They also examined the technical specifics and feasibility of incorporating a lacrimal drainage apparatus into facial allografting. The authors performed a standardized face vascularized composite allograft on 4 hemi-faces (2 fresh cadavers)...
March 20, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29551486/parathyroid-hormone-gene-activated-matrix-with-dfdba-collagen-composite-matrix-enhances-bone-regeneration-in-rat-calvarial-bone-defects
#9
Po-Hui Lee, Tu-Lai Yew, Yu-Lin Lai, Shyh-Yuan Lee, Hen-Li Chen
BACKGROUND: Gene-activated matrix (GAM) induces sustained local production of growth factors to promote tissue regeneration. GAM contains a plasmid DNA (pDNA) encoding target proteins that is physically entrapped within a biodegradable matrix carrier. GAM with a pDNA encoding the first 34 amino acids of parathyroid hormone (PTH 1-34) and a collagen matrix enhances bone regeneration in long bone defects. Demineralized freeze-dried bone allograft (DFDBA) is a widely used osteoinductive bone graft...
March 15, 2018: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29444919/tracheal-replacement
#10
REVIEW
Harry Etienne, Dominique Fabre, Abel Gomez Caro, Frederic Kolb, Sacha Mussot, Olaf Mercier, Delphine Mitilian, Francois Stephan, Elie Fadel, Philippe Dartevelle
Tracheal reconstruction is one of the greatest challenges in thoracic surgery when direct end-to-end anastomosis is impossible or after this procedure has failed. The main indications for tracheal reconstruction include malignant tumours (squamous cell carcinoma, adenoid cystic carcinoma), tracheoesophageal fistula, trauma, unsuccessful surgical results for benign diseases and congenital stenosis. Tracheal substitutes can be classified into five types: 1) synthetic prosthesis; 2) allografts; 3) tracheal transplantation; 4) tissue engineering; and 5) autologous tissue composite...
February 2018: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/29355742/intraarticular-synovial-sarcoma-of-the-knee-rising-from-a-lateral-meniscus-a-case-report
#11
M Bergovec, M Smerdelj, F Bacan, S Seiwerth, D Herceg, M Prutki
Synovial sarcoma (SS) is a rare mesenchymal tumor, accounting less than 10% of soft tissue sarcomas. We report a case of intraarticular SS mimicking nodular synovitis and lateral meniscus rupture. Due to clinical and radiological presentation, arthroscopic synovectomy was performed, and histology confirmed nodular synovitis. After four years the lesion recurred and new arthroscopic biopsy was performed, revealing a monophasic SS with SYT/SSX1 translocation. Repeated histology of the first specimen confirmed appearance of a nodular synovitis microscopically, with no morphological criteria for a sarcoma, but molecular analysis showed positive SYT/SSX1 translocation...
April 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29338185/injectable-and-thermosensitive-hydrogel-and-pdlla-electrospun-nanofiber-membrane-composites-for-guided-spinal-fusion
#12
Ying Qu, BeiYu Wang, BingYang Chu, ChenLu Liu, Xin Rong, Hua Chen, JinRong Peng, ZhiYong Qian
Spinal fusion is the classic treatment to achieve spinal stability for the treatment of the spinal disease. Generally, spinal fusion still has to combine a certain of bone matrix for promoting bone formation to achieve the desired fusion effect based on the surgery, including the traditional bone matrix, such as the autologous bone, allografts and xenografts. Nevertheless, some problems still existed such as the immunogenic problems, the secondary wound, and pathogenic transfer and so on. Here the injectable thermosensitive hydrogel could substitute to avoid the problems as a potential biological scaffold for tissue engineering...
February 7, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29323942/comparison-of-juvenile-allogenous-articular-cartilage-and-bone-marrow-aspirate-concentrate-versus-microfracture-with-and-without-bone-marrow-aspirate-concentrate-in-arthroscopic-treatment-of-talar-osteochondral-lesions
#13
Sydney C Karnovsky, Bridget DeSandis, Amgad M Haleem, Carolyn M Sofka, Martin O'Malley, Mark C Drakos
BACKGROUND: The purpose of this study was to compare the functional and radiographic outcomes of patients who received juvenile allogenic chondrocyte implantation with autologous bone marrow aspirate (JACI-BMAC) for treatment of talar osteochondral lesions with those of patients who underwent microfracture (MF). METHODS: A total of 30 patients who underwent MF and 20 who received DeNovo NT for JACI-BMAC treatment between 2006 and 2014 were included. Additionally, 17 MF patients received supplemental BMAC treatment...
April 2018: Foot & Ankle International
https://www.readbyqxmd.com/read/29319572/vascularized-composite-allotransplantation-of-the-elbow-joint-a-cadaveric-study
#14
Mitchell A Pet, Angelo B Lipira, Yusha Liu, Dennis Kao, Jason H Ko
BACKGROUND: Surgical options for the unreconstructable elbow are limited to arthrodesis, total arthroplasty, or osteoarticular allograft reconstruction. Each of these options is limited by severe functional impairment and/or high complication rates. Vascularized allotransplantation of the elbow joint has the potential to mitigate these complications. In this study, we describe our technique for harvesting the elbow for vascularized joint transplantation and demonstrate the flap's vascularity using contrast angiography...
April 2018: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/29316256/immunosuppressive-effect-of-the-gut-microbiome-altered-by-high-dose-tacrolimus-in-mice
#15
Z Zhang, L Liu, H Tang, W Jiao, S Zeng, Y Xu, Q Zhang, Z Sun, A Mukherjee, X Zhang, X Hu
The alterations induced in gut microbiota by tacrolimus may affect immune function and organ transplantation. Mice were treated with high-dose tacrolimus for 14 days. The fecal microbiota were analyzed by pyrosequencing the 16S rRNA genes, and the effect on metabolism was predicted using the sequence data. The subgroups of T cells in the serum, gut-associated lymphoid tissue, and draining lymph nodes were determined by flow cytometry. Tacrolimus treatment significantly altered the relative abundance of Allobaculum, Bacteroides, and Lactobacillus and CD4+ CD25hi FoxP3+ regulatory T cells in the colonic mucosa and the circulation...
January 9, 2018: American Journal of Transplantation
https://www.readbyqxmd.com/read/29305041/arthroscopic-treatment-of-osteochondral-lesions-of-the-talus-using-juvenile-articular-cartilage-allograft-and-autologous-bone-marrow-aspirate-concentration
#16
Bridget A DeSandis, Amgad M Haleem, Carolyn M Sofka, Martin J O'Malley, Mark C Drakos
Juvenile allogenic chondrocyte implantation (JACI; DeNovo NT Natural Tissue Graft® ; Zimmer, Warsaw, IN) with autologous bone marrow aspirate concentrate (BMAC) is a relatively new all-arthroscopic procedure for treating critical-size osteochondral lesions (OCLs) of the talus. Few studies have investigated the clinical and radiographic outcomes of this procedure. We collected the clinical and radiographic outcomes of patients who had undergone JACI-BMAC for talar OCLs to assess treatment efficacy and cartilage repair tissue quality using magnetic resonance imaging (MRI)...
March 2018: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29244692/reconstruction-of-extended-bone-defects-using-massive-allografts-combined-with-surgical-angiogenesis-a-case-report
#17
Victoria Struckmann, Gerhard Schmidmaier, Thomas Ferbert, Ulrich Kneser, Thomas Kremer
CASE: A 20-year-old patient presented with an extended composite knee defect with destruction of the medial femoral condyle, including the medial collateral ligament. Treatment included using an anterolateral thigh flap for soft-tissue reconstruction, tensor fasciae latae muscle for ligament repair, and a massive allogenic bone graft of the medial femoral condyle that was revascularized with an osteocutaneous composite free flap from the contralateral femur. At 17 months postoperatively, the outcome was evaluated with scores on several established scales and radiographic assessment...
January 2017: JBJS Case Connector
https://www.readbyqxmd.com/read/29244032/evaluation-methods-as-quality-control-in-the-generation-of-decellularized-peripheral-nerve-allografts
#18
Charlot Philips, Maria Cornelissen, Víctor Carriel
Nowadays, the high incidence of peripheral nerve injuries and the low success ratio of surgical treatments are driving research to the generation of novel alternatives to repair critical nerve defects. In this sense, tissue engineering has emerged as a possible alternative with special attention to decellularization techniques. Tissue decellularization offers the possibility to obtain a cell-free, natural extracellular matrix (ECM), characterized by an adequate 3D organization and proper molecular composition to repair different tissues or organs, including peripheral nerves...
April 2018: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29193065/stereological-assessment-of-the-blood-air-barrier-and-the-surfactant-system-after-mesenchymal-stem-cell-pretreatment-in-a-porcine-non-heart-beating-donor-model-for-lung-transplantation
#19
Anke Schnapper, Astrid Christmann, Lars Knudsen, Parwis Rahmanian, Yeong-Hoon Choi, Mohamed Zeriouh, Samira Karavidic, Klaus Neef, Anja Sterner-Kock, Maria Guschlbauer, Florian Hofmaier, Alexandra C Maul, Thorsten Wittwer, Thorsten Wahlers, Christian Mühlfeld, Matthias Ochs
More frequent utilization of non-heart-beating donor (NHBD) organs for lung transplantation has the potential to relieve the shortage of donor organs. In particular with respect to uncontrolled NHBD, concerns exist regarding the risk of ischaemia/reperfusion (IR) injury-related graft damage or dysfunction. Due to their immunomodulating and tissue-remodelling properties, bone-marrow-derived mesenchymal stem cells (MSCs) have been suspected of playing a beneficial role regarding short- and long-term survival and function of the allograft...
February 2018: Journal of Anatomy
https://www.readbyqxmd.com/read/29115567/preparation-and-characterization-of-acellular-adipose-tissue-matrix-using-a-combination-of-physical-and-chemical-treatments
#20
Mei Song, Yi Liu, Ling Hui
Decellularized adipose extracellular matrix (ECM) has been used in the clinic to support the regeneration of adipose tissues. The methods used to produce adipose tissue ECM scaffolds exhibit distinct effects upon the structural and functional components of the resultant scaffold material. The current study presents an acellular ECM scaffold from human adipose tissues derived using successive physical and chemical treatments, including repeated freeze‑thaw cycles followed by centrifugation, polar solvent extraction and enzymatic digestion...
January 2018: Molecular Medicine Reports
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