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Cell and Tissue Banking

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https://www.readbyqxmd.com/read/30008068/single-versus-double-pass-technique-for-preparation-of-ultrathin-descemet-s-stripping-automated-endothelial-keratoplasty-tissues-from-donated-whole-eyes
#1
Mozhgan Rezaei Kanavi, Tahereh Chamani, Bahareh Kheiri, Mohammad Ali Javadi
This study was conducted to analyze the preoperative thickness profile and endothelial rating of ultrathin Descemet's stripping automated endothelial keratoplasty (UT-DSAEK) tissues prepared with a single versus double microkeratome pass from donated whole eyes and corresponding eye bank postoperative results. Microkeratome-assisted UT-DSAEK tissues were prepared from freshly donated whole eyes with single-pass (SP) and double-pass (DP) technique in the Central Eye Bank of Iran. Preoperative thickness profiles and endothelial cell densities of UT-DSAEK tissues were obtained from optical coherence tomography and specular microscopy, respectively, and compared between groups...
July 14, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/30006824/effects-of-supercritical-fluid-co-2-and-25-kgy-gamma-irradiation-on-the-initial-mechanical-properties-and-histological-appearance-of-tendon-allograft
#2
Mazyar Irani, Vedran Lovric, William R Walsh
Tendon allografts, when autograft options are limited or when obtaining an autograft is not aligned with the patients' best interest, play an important role in tendon and ligament reconstruction. To minimize the risk of infectious disease transmission tissue banks perform screening tests and the allografts cleaned are sterilized. The current study examines and compares the initial mechanical properties and histological appearance of supercritical CO2 (SCCO2 )-treated and gamma-irradiated porcine extensor tendons...
July 13, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/30006823/tissue-and-blood-establishments-the-demise-of-mad-hatters-in-a-decade
#3
Michael A Cox
The EU Directives for human tissues and cells (Directive 2004/23/EC) and for blood and blood components (Directive 2002/98/EC, with their related Directives), promotes the principle to minimise or remove potential sources of contamination (e.g. foreign particles, microorganisms, processing agents). Under this framework, mercury thermometers are of interest; as these devices present potential hazards through their use in preparation processes (for the verification of temperature criteria) or temperature monitoring systems (for the preservation of materials and reagents)...
July 13, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29974309/in-vitro-and-in-vivo-evaluation-of-xenogeneic-bone-putty-with-the-carrier-of-hydrogel-derived-from-demineralized-bone-matrix
#4
Naili Zhang, Lina Ma, Xiaowei Liu, Xiaorui Jiang, Zhenhai Yu, Dongmei Zhao, Luping Zhang, Chunlei Zhang, Fei Huang
The demineralized bone matrix (DBM) putty is a traditional bone graft utilized to facilitate the repair and reconstruction of bone. Recent studies indicated the DBM putties with the various carriers were different in bone repairing ability. In order to prepare a kind of DBM putty with a good biocompatibility and bioactivity, the DBM gel was processed from the DBM and the feasibility as a carrier for the DBM putty was evaluated. After the bovine DBM gel was prepared, the BMPs content as well as the ability to promote osteogenic differentiation of MC3T3-E1 cells in vitro were investigated...
July 5, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29934913/radiation-sterilisation-and-tissue-banking
#5
EDITORIAL
Peter Myint
No abstract text is available yet for this article.
June 22, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29911299/overview-on-radiation-and-tissue-banking-in-latin-america
#6
Eulogia Kairiyama, Maria Esther Martínez Pardo, Eddy Sánchez Noda, Isabel Otero
The International Atomic Energy Agency (IAEA) played an important role in the establishment of new tissue banks and the improvement of already existing ones in Latin America. The Agency strongly supported, through regional, interregional and national technical cooperation projects, providing equipment, expert missions and training for the production and application of human tissues for transplantation. From 1999 to 2005 five regional courses were given in Buenos Aires under the modality of 1-year distance learning training courses and 1-week face to face courses...
June 18, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29876883/tsmu-solution-improves-rabbit-osteochondral-allograft-preservation-and-transplantation-outcome
#7
Famin Cao, Jianhong Qi, Hongqiang Song, Di Xie, Lu Zhou, Yunning Han, Hao Li, Qi Wu, Jun Dong, Yanming Zhang
To compare the effects of Tsmu solution with vitrification on chondrocyte viability and examine histological and biomechanical properties of osteochondral allografts (OCAs) after storage, OCAs from femoral condyles of New Zealand rabbits were harvested, stored for 35 days in Tsmu solution or by in vitro vitrification, and subjected to in vivo and in vitro assays. Stored OCAs were transplanted into knee femoral condyle cartilage defects in recipient rabbits. Chondrocyte viability and histological changes of cartilage grafts were assessed in vitro...
June 6, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29858719/multilineage-potential-research-of-beijing-duck-amniotic-mesenchymal-stem-cells
#8
Caiyun Ma, Kunfu Wang, Hongda Ji, Hongliang Wang, Liangcai Guo, Zhiyong Wang, Han Ren, Xishuai Wang, Weijun Guan
Amnion, which is usually discarded as medical waste, is considered as abundant sources for mesenchymal stem cells. In human and veterinary medicine, the multipotency of mesenchymal stem cells derived from amnion (AMSCs) together with their plasticity, self-renewal, low immunogenicity and nontumorigenicity characteristics make AMSCs a promising candidate cell for cell-based therapies and tissue engineering. However, up till now, the multipotential characteristics and therapeutic potential of AMSCs on preclinical studies remain uncertain...
June 1, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29855739/platelet-concentrate-as-an-additive-to-bone-allografts-a-laboratory-study-using-an-uniaxial-compression-test
#9
David Putzer, Markus Dobersberger, Alex Pizzini, Debora Coraça-Huber, Christoph Ammann, Michael Nogler
Chemical cleaning procedures of allografts are destroying viable bone cells and denaturing osteoconductive and osteoinductive proteins present in the graft. The aim of the study was to investigate the mechanical differences of chemical cleaned allografts by adding blood, clotted blood; platelet concentrate and platelet gel using a uniaxial compression test. The allografts were chemically cleaned, dried and standardized according to their grain size distribution. Uniaxial compression test was carried out for the four groups before and after compacting the allografts...
May 31, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29796721/the-emergence-and-pitfalls-of-international-tissue-banking
#10
Glyn O Phillips
The rapid growth of tissue banking and associated international organisations following the fall of the Berlin wall in 1991 is described. This surge in collaboration led to a world-wide constructive movement to use and to produce human tissues. As the years progressed industrialisation, led by the USA, improved the quality of tissue allografts but led higher costs and consolidation within the developing industry. The growth of litigation more than kept pace with the industrial progress. One landmark case is described, the outcome of which could revolutionise the current practices now applied to eliminate possible viral contamination of implanted tissue grafts...
May 23, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29728941/regulatory-aspects-of-tissue-donation-banking-and-transplantation-in-india
#11
Astrid Lobo Gajiwala
Amendments to India's Transplantation of Human Organs Act, 1994, have established the legality of tissue donation and transplantation from deceased donors and the conditions under which they are permitted. The amended Act, now known as The Transplantation of Human Organs and Tissues Act, 1994, seeks to prevent the commercialization of tissue donation and to guarantee the safety of indigenous allografts. Registration of tissue banks, compliance with national standards and the appointment of transplant co-ordinators in hospitals registered under the Act are now mandatory...
May 4, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29700649/the-addition-of-albumin-improves-schwann-cells-viability-in-nerve-cryopreservation
#12
Sara Alicia González Porto, Nieves Domenech, Alba González Rodríguez, Edgar Mauricio Avellaneda Oviedo, Francisco J Blanco, María C Arufe Gonda, Ángel Álvarez Jorge, Jacinto Sánchez Ibañez, Esther Rendal Vázquez
The purpose of the current study was to establish a valid protocol for nerve cryopreservation, and to evaluate if the addition of albumin supposed any advantage in the procedure. We compared a traditional cryopreservation method that uses dimethyl sulfoxide (DMSO) as cryoprotectant, to an alternative method that uses DMSO and albumin. Six Wistar Lewis rats were used to obtain twelve 20 mm fragments of sciatic nerve. In the first group, six fragments were cryopreserved in 199 media with 10% DMSO, with a temperature decreasing rate of 1 °C per minute...
April 26, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29696490/interaction-of-preservation-methods-and-radiation-sterilization-in-human-skin-processing-with-particular-insight-on-the-impact-of-the-final-water-content-and-collagen-disruption-part-i-process-validation-water-activity-and-collagen-changes-in-tissues-cryopreserved
#13
M R Herson, K Hamilton, J White, D Alexander, S Poniatowski, A J O'Connor, J A Werkmeister
Current regulatory requirements demand an in-depth understanding and validation of protocols used in tissue banking. The aim of this work was to characterize the quality of split thickness skin allografts cryopreserved or manufactured using highly concentrated solutions of glycerol (50, 85 or 98%), where tissue water activity (aw ), histology and birefringence changes were chosen as parameters. Consistent aw outcomes validated the proposed processing protocols. While no significant changes in tissue quality were observed under bright-field microscopy or in collagen birefringence, in-process findings can be harnessed to fine-tune and optimize manufacturing outcomes in particular when further radiation sterilization is considered...
April 25, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29696489/tissue-banking-in-asia-pacific-region-past-present-and-future
#14
Aziz Nather, Foong Shi Yun Mandy, Tan Ning, Wang Kaiying
Tissue banking in the Asia Pacific regions is driven by two main forces-firstly the International Atomic Energy Agency (IAEA) via Regional Co-operative Agreement projects and secondly by the Asia Pacific Association of Surgical Tissue Banking (APASTB). This overview is written in three sections: (1) History of tissue banking in individual country in the region. (2) History of APASTB. (3) History of IAEA programme in Asia Pacific region. The current status and future of the tissue banking programme in the region will be discussed...
April 25, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29693226/effect-of-freezing-and-storage-temperature-on-stability-and-antimicrobial-activity-of-an-antibiotic-mixture-used-for-decontamination-of-tissue-allografts
#15
Vicente Mirabet, Ana Melero, M Dolores Ocete, Dimitra Bompou, Miriam Torrecillas, Juan J Carreras, Isabel Valero, Ana I Marqués, Rafael Medina, Luis R Larrea, Cristina Arbona, Teresa M Garrigues, Concepción Gimeno
One of the most important risks to be controlled in tissue banking is the infection associated with the clinical use of auto- and allografts. Thus, tissue disinfection protocols are used, in addition to processing in controlled environments. For this purpose, combinations of antibiotics are designed to ensure a broad spectrum of antimicrobial activity. This type of protocol is usually validated by testing its antimicrobial efficacy. In this work, we have studied the effect of several factors on the potential of an antibiotic mixture: container, freezing, storage at 4 °C, storage at - 30 °C and storage at - 80 °C...
April 24, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29687168/comparison-of-automated-and-conventional-microbiological-examination-of-donated-human-cardiac-tissue-in-heart-valve-banking
#16
Letícia Kraft, Felipe Francisco Tuon, Victoria Stadler Tasca Ribeiro, Luciana Cristina Wollmann, Paula Hansen Suss, Marcelo Pilonetto, Francisco Diniz Affonso da Costa
Most tissue banks use the conventional method; however, the automated method has advantages over the conventional method. The aim of this study was to compare the conventional and automated methods of culture in human cardiac tissue using an artificial contamination model. Myocardial samples were contaminated with sequential concentration (104 to 10-1  CFU/mL) with Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus and Candida albicans. Cultures were obtained from solution were the fragment was immersed and minced tissue, before and after the routine decellularization solution, with automated and conventional culture methods...
April 23, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29556882/bioburden-in-transport-solutions-of-human-cardiovascular-tissues-a-comparative-evaluation-of-direct-inoculation-and-membrane-filter-technique
#17
Letícia Kraft, Victoria Stadler Tasca Ribeiro, Luciana Cristina Wollmann, Paula Hansen Suss, Felipe Francisco Tuon
All cardiac allograft tissues are under potential contamination, requiring a validated terminal sterilization process or a minimal bioburden. The bioburden calculation is important to determine the bacterial burden and further decontamination and disinfection strategies for the valve processing. The aim of this study was to determine the bioburden from transport solution (TS) of heart valves obtained from non-heart-beating and heart-beating donors in different culture methods. The bioburden from TS was determined in 20 hearts donated for valve allograft tissue using membrane filter (MF) and direct inoculation...
March 19, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29511942/the-evaluation-of-the-transport-medium-for-extracted-premolars-prior-to-cryopreservation-a-systematic-literature-review
#18
REVIEW
Noëmi M C De Roo, Laurent A M Thierens, Liesbeth Temmerman, Guy A M De Pauw
Prior to cryopreservation, a tooth is transported from a contaminated oral environment to the tooth bank. Our objective was to identify all studies reporting or investigating a transport protocol prior to the cryopreservation of teeth, in terms of decontamination of the subjects. The systematic literature search (1970-2017) was based on MEDLINE via PubMed, Web of Science and the Cochrane Library. The reference lists of the included studies and the Science Citation Index were used for hand searching (snowballing)...
March 7, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29508105/decellularized-amnion-scaffold-with-activated-prp-a-new-paradigm-dressing-material-for-burn-wound-healing
#19
Jeevitaa Kshersagar, Ravi Kshirsagar, Shashikant Desai, Raghvendra Bohara, Meghnad Joshi
Direct application of amnion has greater risk of immunological rejection and infection. Decellularization is an effective method to lower the risk of immune complications and infections. The bioreactor assembly with multiple cassettes was designed for decellurization of multiple amnions with different cell types simultaneously in single run. A detergent-based protocol was modified to remove all cellular components from amnion and diminish the DNA content to render it non-immunogenic. Amnion (n = 10) were treated with 2% sodium dodecyl sulphate (SDS), 5% dimethyl sulfoxide (DMSO) and 2% sodium deoxycholeate (SD)...
March 5, 2018: Cell and Tissue Banking
https://www.readbyqxmd.com/read/29502254/organization-model-for-allotransplantations-of-cryopreserved-vascular-grafts-in-czech-republic
#20
Miroslav Špaček, Pavel Měřička, Libor Janoušek, Petr Štádler, Miloš Adamec, Robert Vlachovský, Igor Guňka, Pavel Navrátil, Filip Thieme, Petr Mitáš, Rudolf Špunda, Jaroslav Špatenka, Robert Staffa, Petr Němec, Jaroslav Lindner
The transplantation of fresh or cryopreserved vascular allografts in patients with a prosthetic graft infection or critical limb ischemia is necessary for their limb salvage and, in many cases, represents a lifesaving procedure. While transplantation of fresh allografts has a long history in the Czech Republic, the standard use of cryopreserved vascular allografts was introduced into the clinical practice in 2011 as a result of the implementation of EU Directive 2004/23/EC into national legislation (Human Cell and Tissue Act No...
March 3, 2018: Cell and Tissue Banking
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