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Composite tissue transplantation

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https://www.readbyqxmd.com/read/28639839/biocompatible-agarose-chitosan-coated-silver-nanoparticle-composite-for-soft-tissue-engineering-applications
#1
Nupur Kumar, Dayananda Desagani, Girish Chandran, Narendra Nath Ghosh, Ganesh Karthikeyan, Sachin Waigaonkar, Anasuya Ganguly
With increasing gap in the demand and supply of vital organs for transplantation there is a pressing need to bridge the gap with substitutes. One way to make substitutes is by tissue engineering which involves combining several types of synthetic or biomaterials, cells and growth factors cross-linked together to synthesize a functional scaffold for repair or replacement of non-functional organs. Nanoparticle based composites are gaining importance in tissue engineering due to their ability to enhance cell attachment and proliferation...
June 22, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28621916/construction-of-anterior-hemi-corneal-equivalents-using-nontransfected-human-corneal-cells-and-transplantation-in-dog-models
#2
Bin Xu, Zhan Song, Tingjun Fan
Tissue-engineered human anterior hemi-cornea (TE-aHC) is a promising equivalent for treating anterior lamellar keratopathy to surmount the severe shortage of donated corneas. This study was intended to construct a functional TE-aHC with nontransfected human corneal stromal (ntHCS) and epithelial (ntHCEP) cells using acellular porcine corneal stromata (aPCS) as a carrier scaffold, and evaluate its biological functions in a dog model. To construct a TE-aHC, ntHCS cells were injected into an aPCS scaffold and cultured for 3 days; then, ntHCEP cells were inoculated onto the Bowman's membrane of the scaffold and cultured for 5 days under air-liquid interface condition...
June 16, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28594678/transplantation-of-bioprinted-tissues-and-organs-technical-and-clinical-challenges-and-future-perspectives
#3
Dino J Ravnic, Ashley N Leberfinger, Srinivas V Koduru, Monika Hospodiuk, Kazim K Moncal, Pallab Datta, Madhuri Dey, Elias Rizk, Ibrahim T Ozbolat
: Three-dimensional (3D) bioprinting is a revolutionary technology in building living tissues and organs with precise anatomic control and cellular composition. Despite the great progress in bioprinting research, there has yet to be any clinical translation due to current limitations in building human-scale constructs, which are vascularized and readily implantable. In this article, we review the current limitations and challenges in 3D bioprinting, including in situ techniques, which are one of several clinical translational models to facilitate the application of this technology from bench to bedside...
July 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28587468/human-platelet-vesicles-exhibit-distinct-size-and-proteome
#4
Bhanu P Jena, Paul M Stemmer, Sunxi Wang, Guangzhao Mao, Kenneth T Lewis, Daniel A Walz
In the past 50 years, isolated blood platelets have had restricted use in wound healing, cancer therapy, and organ and tissue transplant, to name a few. The major obstacle for its unrestricted use has been, among others, the presence of ultrahigh concentrations of growth factors and the presence of both pro-angiogenic and anti-angiogenic proteins. To overcome this problem requires the isolation and separation of the membrane bound secretory vesicles containing the different factors. In the current study, high-resolution imaging of isolated secretory vesicles from human platelets using atomic force microscopy (AFM) and mass spectrometry enabled characterization of the remaining vesicles size and composition following their immunoseparation...
June 9, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28576023/bioengineered-porous-composite-curcumin-silk-scaffolds-for-cartilage-regeneration
#5
Do Kyung Kim, Jeong In Kim, Bo Ra Sim, Gilson Khang
Articular cartilage repair is a challenge due to its limited self-repair capacity. Cartilage tissue engineering supports to overcome following injuries or degenerative diseases. Herein, we fabricated the scaffold composed of curcumin and silk fibroin as an appropriate clinical replacement for defected cartilage. The scaffolds were designed to have adequate pore size and mechanical strength for cartilage repair. Cell proliferation, sulfated glycosaminoglycan (sGAG) content and mRNA expression analysis indicated that chondrocytes remained viable and showed its growth ability in the curcumin/silk scaffolds...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28574951/single-artery-human-ear-graft-procurement-a-simplified-approach
#6
Jérôme Duisit, Hadrien Amiel, Donovan Debluts, Louis Maistriaux, Alexander Gerdom, Anne Bol, Pierre Gianello, Catherine Behets, Benoit Lengelé
BACKGROUND: In the field of experimental facial vascularized composite tissue allotransplantation (VCA), a human auricular subunit model, pedicled on both superficial temporal (STA) and posterior auricular (PAA) arteries was described. Clinical cases of extensive auricular replantation however, suggested that a single artery could perfuse the entire flap. In our study, variants of this single pedicle approach have been studied, aiming to develop a more versatile replantation technique, in which the question of venous drainage has also been addressed...
May 31, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28560817/outcomes-of-pulmonary-arterial-hypertension-therapy-in-australia-is-monotherapy-adequate
#7
Avalon Moonen, Roger Garsia, Peter Youssef, Paul Torzillo, Tamera Corte, Christiane Boehm, Rachael Cordina, David Celermajer, Edmund Lau
BACKGROUND: In Australia, government-subsidised treatment of pulmonary arterial hypertension (PAH) is limited to monotherapy. Recent international guidelines advocate that initial combination therapy be considered for all symptomatic PAH patients. We sought to characterise "real-life" outcomes in PAH patients initiated on monotherapy. METHODS: We performed a retrospective analysis of 100 consecutive PAH patients at a single centre, who were commenced on monotherapy for PAH between 2004 and 2015...
May 31, 2017: Internal Medicine Journal
https://www.readbyqxmd.com/read/28554010/a-bilaminated-decellularized-scaffold-for-islet-transplantation-structure-properties-and-functions-in-diabetic-mice
#8
Xi Wang, Kai Wang, Wei Zhang, Ming Qiang, Ying Luo
Ectopic transplantation of islets provides a beta cell-replacement approach that may allow the recovery of physiological regulation of the blood sugar level in patients with Type I diabetes (T1D). In development of new extrahepatic islet transplantation protocols in support of the islet engraftment, it is pivotal to develop scaffold materials with multifaceted functions to provide beneficial microenvironment, mediate host response in favor of vascularization/islet integration and maintain long-term islet function at the transplantation site...
May 22, 2017: Biomaterials
https://www.readbyqxmd.com/read/28543403/decellularized-human-liver-is-too-heterogeneous-for-designing-a-generic-extracellular-matrix-mimic-hepatic-scaffold
#9
Giorgio Mattei, Chiara Magliaro, Andrea Pirone, Arti Ahluwalia
Decellularized human livers are considered the perfect extracellular matrix (ECM) surrogate because both three-dimensional architecture and biological features of the hepatic microenvironment are thought to be preserved. However, donor human livers are in chronically short supply, both for transplantation or as decellularized scaffolds, and will become even scarcer as life expectancy increases. It is hence of interest to determine the structural and biochemical properties of human hepatic ECM to derive design criteria for engineering biomimetic scaffolds...
May 23, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28540229/ushering-in-the-era-of-penile-transplantation
#10
REVIEW
Alison M Rasper, Ryan P Terlecki
Penile transplantation is a novel approach to management of penile loss in the developing field of composite tissue allotransplantation (CTA). Prior management for significant penile loss has been free flap phalloplasty with issues related to function, cosmesis, and functional loss from the location of flap harvest. Transplantation has been an evolving field with advancement in CTA over the past several decades leading to the option of penile transplant. Management of penile injury with replantation provided some preliminary groundwork on the technical aspects for penile transplantation...
April 2017: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28538571/angiosome-based-allografts-vascularized-composite-allotransplantation-for-tailored-subunit-reconstruction-with-volkmann-ischemic-contracture-as-a-case-in-point
#11
G Ian Taylor, David S Sparks, Adam C Gascoigne, Russell J Corlett, Mark W Ashton
BACKGROUND: As we enter an age with new approaches to tissue reconstruction, the emphasis on the adage "like for like" has become even more relevant. This study illustrates the potential for several tailored vascularized composite allotransplantation reconstructive techniques and, in particular, for the management of Volkmann contracture. METHODS: Twenty fresh cadaver dissections and 30 archival lead oxide radiographic studies were examined to (1) identify potential upper limb vascularized composite allotransplantation donor sites (i...
June 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28509699/penis-transplantation-first-us-experience
#12
Curtis L Cetrulo, Kai Li, Harry M Salinas, Matthew D Treiser, Ilse Schol, Glen W Barrisford, Francis J McGovern, Adam S Feldman, Michael T Grant, Cigdem Tanrikut, Jeffrey H Lee, Richard J Ehrlichman, Paul W Holzer, Garry M Choy, Raymond W Liu, Zhi Yang Ng, Alexandre G Lellouch, Josef M Kurtz, William G Austen, Jonathan M Winograd, Branko Bojovic, Kyle R Eberlin, Ivy A Rosales, Robert B Colvin, Dicken S C Ko
OBJECTIVE: We describe the first successful penis transplant in the United States in a patient with a history of subtotal penectomy for penile cancer. BACKGROUND: Penis transplantation represents a new paradigm in restoring anatomic appearance, urine conduit, and sexual function after genitourinary tissue loss. To date, only 2 penis transplants have been performed worldwide. METHODS: After institutional review board approval, extensive medical, surgical, and radiological evaluations of the patient were performed...
May 15, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28506774/immunomodulatory-and-protective-effects-of-adipose-tissue-derived-mesenchymal-stem-cells-in-an-allograft-islet-composite-transplantation-for-experimental-autoimmune-type-1-diabetes
#13
Jamal Mohammadi Ayenehdeh, Bahare Niknam, Shima Rasouli, Seyed Mahmoud Hashemi, Hossein Rahavi, Nima Rezaei, Masoud Soleimani, Ali Liaeiha, Mohammad Hossein Niknam, Nader Tajik
BACKGROUND: Allogeneic islet transplantation could be an ideal alternative therapy for Type 1 Diabetes Mellitus (T1DM). Adipose Tissue-derived Mesenchymal Stem Cells (AT-MSCs) characterized by immunomodulatory and protective effects may have the potential to improve the outcome of this highly immunogenic transplant. METHODS: Syngenic AT-MSCs along with allograft islets embedded in hydrogelic composite and transplanted intraperitoneally in Streptozotocin (STZ) induced diabetic C57BL/6 mice...
May 12, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28462693/sarcopenia-in-patients-with-advanced-liver-disease
#14
Francesca Romana Ponziani, Antonio Gasbarrini
Sarcopenia is the loss of muscle mass and function, affecting up to 70% of patients with advanced liver disease. Liver cirrhosis is characterized by an altered glucose metabolism, lipid oxidation, ketogenesis and protein catabolism, leading to the loss of adipose and muscle tissue. The gastrointestinal dysfunction of cirrhotic patients results in inadequate nutrients intake and is responsible for muscle weakness thus limiting physical exercise and perpetuating the reduction of muscle mass. Recently, alterations of hormonal pathways involved in muscle growth, increased intestinal permeability and changes in the gut microbiota composition have been reported in cirrhotic patients...
April 28, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28445487/bmt-decreases-hfd-induced-weight-gain-associated-with-decreased-preadipocyte-number-and-insulin-secretion
#15
Saeed Katiraei, Lisa R Hoving, Lianne van Beek, Sharida Mohamedhoesein, Françoise Carlotti, Janna A van Diepen, Patrick C N Rensen, Mihai G Netea, Ko Willems van Dijk, Jimmy F P Berbée, Vanessa van Harmelen
Experimental bone marrow transplantation (BMT) in mice is commonly used to assess the role of immune cell-specific genes in various pathophysiological settings. The application of BMT in obesity research is hampered by the significant reduction in high-fat diet (HFD)-induced obesity. We set out to characterize metabolic tissues that may be affected by the BMT procedure and impair the HFD-induced response. Male C57BL/6 mice underwent syngeneic BMT using lethal irradiation. After a recovery period of 8 weeks they were fed a low-fat diet (LFD) or HFD for 16 weeks...
2017: PloS One
https://www.readbyqxmd.com/read/28429072/kidney-development-and-perspectives-for-organ-engineering
#16
REVIEW
Ganna Reint, Aleksandra Rak-Raszewska, Seppo J Vainio
Organ transplantation is currently the best strategy for treating end stage renal disease (ESRD) but the numbers of donor kidneys available are not sufficient to meet the needs of the ever-increasing ESRD population. Therefore, developments in the field of tissue engineering are necessary to provide alternative treatments. Decellularization and three-dimensional (3D) bioprinting strategies may serve as attractive novel options. Since successful tissue engineering requires an in -depth understanding of organ development and regulatory pathways, we discuss signaling in renal development and the composition of the renal extracellular matrix before presenting progress in the decellularization and 3D bioprinting fields...
July 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28422434/rat-hindlimb-cryopreservation-and-transplantation-a-step-toward-organ-banking
#17
A Arav, O Friedman, Y Natan, E Gur, N Shani
In 2016, over 5 million reconstructive procedures were performed in the United States. The recent successes of clinical vascularized composite allotransplantations, hand and face transplantations included, established the tremendous potential of these life-enhancing reconstructions. Nevertheless, due to limited availability and lifelong immunosuppression, application is limited. Long-term banking of composite transplants may increase the availability of esthetically compatible parts with partial or complete HLA matching, reducing the risk of rejection and the immunosuppressive burden...
April 19, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28419733/interphotoreceptor-matrix-based-biomaterial-impact-on-human-retinal-progenitor-cell-attachment-and-differentiation
#18
Joydip Kundu, Andrew Michaelson, Petr Baranov, Marco Chiumiento, Tom Nigl, Michael J Young, Rebecca L Carrier
While cell transplantation therapies show great promise as treatments for retinal degeneration, the challenge of low cell survival upon transplantation motivates exploration of materials that may serve as cell delivery vehicles and promote survival and differentiation. In this study, we explored the native matrix that surrounds the outer segments of photoreceptors and promotes their homeostasis, interphotoreceptor matrix (IPM), as a substrate for human retinal progenitor cells (hRPCs). Bovine IPM was characterized to determine its structure and biochemical composition, and processed to develop substrates for cells...
April 18, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28395520/ischemic-conditioning-in-kidney-transplantation
#19
Kristin Veighey, Raymond MacAllister
Ischemia-reperfusion injury is a composite of the injury sustained during a period of reduced or absent blood flow to a tissue or organ and the additional insult sustained on reperfusion, which limits the amount of tissue that can be salvaged. Ischemia-reperfusion injury is the predominant insult during kidney transplantation, contributing to graft dysfunction, increased rates of acute rejection, and reduced rejection-free graft survival. In this review, we discuss the potential therapeutic benefits of a cost-effective and low-risk intervention, ischemic preconditioning, and its potential for improving kidney function following transplantation...
July 2017: Journal of Cardiovascular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28391767/alginate-based-microcapsules-generated-with-the-coaxial-electrospray-method-for-clinical-application
#20
Catherine Barron, Jia-Qiang He
Alginate-based microencapsulation of cells has made a significant impact on the fields of regenerative medicine and tissue engineering mainly because of its ability to provide immunoisolation for the encapsulated material. This characteristic has allowed for the successful transplantation of non-autologous cells in several clinical trials for life threatening conditions, such as diabetes, myocardial infarction, and neurodegenerative disorders. Methods for alginate hydrogel microencapsulation have been well developed for various types of cells and can generate microcapsules of different diameters, degradation time, and composition...
April 20, 2017: Journal of Biomaterials Science. Polymer Edition
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