Cell and Tissue Banking

Full-thickness skin wounds occur in many different clinical cases and the use of biological acellular dermal matrices (ADMs) to reconstruct the damaged area is increasing in the field of plastic and reconstructive surgery. In particular, the ability of ADMs to maintain the structural properties of extracellular matrix as well as to provide a suitable environment for cell growth makes their use suitable for the improvement of wound healing and the reduction of side effects deriving from contracture and scar tissue formation...

The goal of periodontal therapy is to prevent periodontal disease progression and to regenerate lost periodontal tissues. Various bone grafts are used alone or in combination with other treatment modalities for periodontal therapy. In literature no reports are presented with block allografts in the treatment of intrabony defects in periodontitis. Hence the study aimed to evaluate and compare clinically and radiographically freeze dried bone and demineralized freeze dried bone block allografts with chorion membrane in intra-bony defects at 12 months post-surgery...

The contamination of the transport solution used in cardiovascular allografts can occur from different sources. Risk factors associated with positive microbiological test of transport solution have not been reported previously. This study aimed to determine the risk factor for contamination of transport solution used in the heart valve allografts stored in a Brazilian tissue bank. This retrospective study was conducted on all donors of cardiovascular allografts stored in a tissue bank from December 2008 to December 2017...

To investigate the impact of different anticoagulants and coagulants with autologous platelet-rich plasma (PRP) in order to evaluate the clinical application of PRP standardization. Bone marrow stem cells (BMSCs) were seeded into autologous PRP gel scaffolds with different anticoagulants (EDTA, heparin sodium HS, and sodium citrate SC) as well as control group (the whole blood group). Quality of PRP was evaluated and flow cytometric assay was used to detect the activity of the platelet (CD62p, PAC-1). BMSCs were also seeded into PRP with different coagulants (Thrombin, Collagen-I, ADP) as well as PRP un-activated (negative group) and L-DMEM complete culture without PRP (control group)...

Corneal disease is the second cause of blindness in developing countries, where the number of corneal grafts needed by far exceeds the number available. In industrialized countries, although corneas are generally available for keratoplasty, onto inflamed and vascularized host beds they are often rejected despite immune-suppression. A non-immunogenic, transparent, cytocompatible stroma is therefore required, which can be lyophilized for long-term conservation. Decellularization methods were tested on porcine corneal stromas before validation on human corneas...

The aim of this study is to evaluate the beneficial effect of Myoinositol (MYO) supplement in freezing media on the post thaw sperm quality. Semen samples from 40 normozoospermic men were divided into two aliquots and frozen with simple or 2 mg/mL MYO supplemented freezing medium. Post thaw process including, computer-assissted sperm analysis was used to analyze sperm motility and morphology. Reactive oxygen species was evaluated by the fluorometry of DCFH-DA, as well as total antioxidant capacity and lipid peroxidation were measured based on colorimetric assay by ELISA reader...

Simple limbal epithelial transplantation (SLET) is a relatively new treatment for severe limbal stem cell deficiency. Outcomes of treatment are typically determined based on clinical manifestations. In this prospective-multicenter study, we aimed to analyze the epithelial phenotypes of the corneas after SLET using IVCM and IC, and correlated them with clinical findings. Ten eyes of nine patients, who underwent SLET (five autologous SLET and five living-related SLET) were recruited. A set of examinations included slit-lamp biomicroscopy, corneal in vivo confocal microscopy (IVCM), and impression cytology (IC) was performed in all eyes at least twice (≥ 3-month interval) postoperatively...

One of most important issue in the field of regenerative medicine is selection of appropriate cells, scaffolds and bioreactors. The present study aimed to investigate the appropriate method for the isolation of human UC-MSCs cells from explant cultured in alginate scaffold within novel perfusion bioreactor. MSCs were isolated with explant method and CD markers such CD73, CD31, CD90 and CD105 as were analyzed by flow cytometry. The culture chamber of the novel perfusion bioreactor was made from Plexiglas and housed the cell/scaffold constructs in the central part and the medium for the whole culture period...

The goal of repairing rotator cuff injuries is an anatomical procedure without tension repair. Considering the high percentage of re-rupture after large and massive lesions repair, numerous surgical solutions have been proposed. The purpose of this systematic review was to present retears and complication rates following arthroscopic treatment of rotator cuff pathology with scaffolds. A systematic review of the existing literature was performed to identify all studies dealing with arthroscopic rotator cuff repair using scaffolds...

To evaluate the clinical outcome of deep hypothermic preservation of autologous skin in the treatment of large-area skin avulsion. Medium or full thickness-skin slices were harvested from large avulsion flaps between July and November 2017. They were stored in liquid nitrogen by vitrification. After the patient's condition became stable and the growth of the wound granulation tissue was satisfactory, the frozen skin slices were reheated quickly and replanted to the wound. Autologous skin that had been kept by deep cryopreservation had a high survival rate when grafted...

The aim of this trial was to compare the clinical and radiographic outcomes of amnion chorion membrane (ACM) with demineralized bone matrix (DBM) in a putty form in management of periodontal intrabony defects. Twenty-two participants with severe chronic periodontitis and intrabony defects, were randomly assigned in two equal parallel groups. Each group was treated with open flap debridement (OFD) and ACM or OFD and DBM putty. Plaque index, gingival index, pocket depth (PD), clinical attachment level (CAL) and radiographic measurement of bone defect area (BDA) were recorded at baseline, 3 and 6 months postoperatively...

Amniotic membrane is a biological material widely used in plastic and reconstructive surgery and in ophthalmology. Due to its excellent biocompatibility and strength we tried to use it as a scaffold for the in vitro cultivation of different cell types, especially keratinocytes and limbal stem cells. It was possible to cultivate limbal stem cells and keratinocytes without using 3T3 mouse fibroblast feeder cells on deep frozen amniotic membranes. The amniotic membrane can also be used as a carrier for suspensions of different types of cells, allowing a substantial reduction of the cultivation time needed to prepare cell cultures for clinical application to burn patients...

Regenerative medicine as a background of stem cell research and therapy has a long history. A wide variety of diseases including Parkinson's disease, heart diseases, multiple sclerosis, spinal cord injury, diabetes mellitus and etc. are candidate to be treated using different types of stem cells. There are several sources of stem cells such as bone marrow, umbilical cord, peripheral blood, germ cells and the embryo/fetus tissues. Fetal stem cells (FSCs) and embryonic stem cells (ESCs) have been described as the most potent stem cell source...

Cryopreservation of testis tissue is a promising approach to save fertility in prepubertal boys under going gonadotoxic cancer therapies. The using biopolymers as a basis of cryoprotective medium can be effective for the optimization of cryopreservation protocols of immature testicular tissue. The research purpose was to determine morphological parameters and metabolic activity of seminiferous tubules of immature rat testes under exposure to cryoprotective solution (DMSO) based on collagen or fibrin gels (CG or FG) as one of the first stages of developing the cryopreservation protocol...

Microbiological contamination of retrieved tissues has become an issue of key importance and is a critical aspect of allograft safety, especially in the case of multi-tissue donations, which frequently become contaminated during retrieval and handling. We analysed contamination in 11,129 tissues with a longitudinal contamination profile for each individual tissue. Specifically, 10,035 musculoskeletal tissues and 1094 cardiovascular tissues were retrieved from a total of 763 multi-tissue donors, of whom 105 heart-beating organ donors and 658 deceased tissue donors...

Cadaver skin is used for temporary wound covering, but there is insufficient evidence regarding its clinical usefulness in patients with major burns. We aimed to analyze the effect of cadaveric skin allograft on mortality rates in patients with burns involving > 30% of total body surface area (TBSA). Our study included 1282 patients with > 30% of TBSA burned admitted to four hospitals in Korea between June 1, 2008 and December 31, 2016. Of these, 698 patients underwent cadaver skin allograft (cadaver group), and 584 were treated with conventional treatment (non-cadaver group)...

The number of tissue donations decreased in The Netherlands over recent years. The aim of this project was to determine the number of missed tissue donors in the Haaglanden Medical Centre and to develop a strategy to improve the number of tissue donors. We retrospectively analyzed patient files of all deceased patients in 2014 for their potential as tissue donors. Our objectives were to determine the number of missed tissue donors and the percentage of correctly identified tissue donors among all physicians and hospitalists in training...

Sustainable reduction in semen quality due to detrimental effects of primary and secondary peroxidative products was occurred during liquid storage. The objective of the current experiment was to explore the influence of bovine serum albumin conjugated linoleic acid (LA) on the rooster spermatozoa routine tests and lipid peroxidative/antioxidative levels stored at 4 °C over 48 h. For this purpose, collected ejaculates (≥ 80% progressive motile spermatozoa) pooled and extended with the phosphate buffer medium without (control) or enriched with different amounts of LA (0...

The bone auto grafting, isografting, allografting and xenografting are used for defective bone replacement or treatment in almost all living species. The X-ray and Gamma (electromagnetic radiation) sterilization performed on the donor bone graft to prevent toxicity or migration of virus/bacterial infections from donors to reciver. Conversely, X-ray and Gamma radiation deteriorates the bone mechanical properties and bone become more susceptible to fracture. Fracture toughness as well as other mechanical properties of bone change with these radiations...

Umbilical cord blood (UCB) is an important source of stem cells, the heart of regenerative medicine. As the globalization and population of the world continues to increase, we are faced with an inundation of new diseases, affecting millions of people. Research work considering stem cells is essential for developing therapy for various conditions. Reduced availability of UCB serves as a hindrance to promote further research. Hence, India being one of the most densely populated countries in the world, can be considered a potential UCB repository...