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Placental tissue graft

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https://www.readbyqxmd.com/read/27826487/aseptically-processed-placental-membrane-improves-healing-of-diabetic-foot-ulcerations-prospective-randomized-clinical-trial
#1
Lawrence A DiDomenico, Dennis P Orgill, Robert D Galiano, Thomas E Serena, Marissa J Carter, Jarrod P Kaufman, Nathan J Young, Charles M Zelen
BACKGROUND: Allogeneic grafts derived from amnion/chorion are known to be efficacious in healing chronic diabetic foot ulcerations (DFUs). The goal of this study was to compare aseptically processed dehydrated human amnion and chorion allograft (dHACA) versus standard of care (SOC) in facilitating wound closure in nonhealing DFUs. METHODS: Patients with DFUs treated with SOC (off-loading, appropriate debridement, and moist wound care) after a 2-week screening period were randomized to either SOC or wound-size-specific dHACA (AmnioBand, Musculoskeletal Transplant Foundation, Edison, N...
October 2016: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/27681807/viable-intact-cryopreserved-human-placental-membrane-for-a-non-surgical-approach-to-closure-in-complex-wounds
#2
K Suzuki, G Michael, Y Tamire
OBJECTIVE: Advances in wound treatment have yielded successful approaches to complex wound closure through plastic surgery or other staged surgical methods. However, not all patients or wounds are candidates for such increasingly rigorous levels of interventions. The exploration of non-surgical treatment options that promote anatomical and functional tissue replacement on an outpatient basis without donor site morbidity is necessary to maximise opportunities for patient mobility and rehabilitation...
October 2016: Journal of Wound Care
https://www.readbyqxmd.com/read/27649406/comparing-the-efficacy-of-viable-cryopreserved-placental-membrane-for-the-treatment-of-wounds-of-diverse-etiologies
#3
Derek S Anselmo, Marc Karpo, Ebony Love, Tracey Vlahovic
INTRODUCTION AND OBJECTIVES: The benefits of using amniotic tissue in skin regeneration are well documented. Today, cryopreservation technology allows for better availability and maintenance of mesenchymal stem cells. This is of particular interest in treating the diabetic foot ulcer as this population has fewer mesenchymal stem cells. The objective of this case series investigation was to compare the efficacy of cryopreserved human amniotic stem cells in treating foot wounds of different etiologies...
September 2016: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/27177771/hypospadias
#4
N Boudaoud, M Pons, M-A Bouche Pillon Persyn, F Lefebvre, M-L Poli Merol, C Francois
Hypospadias is a hypoplasia of the tissues forming the ventral side of the penis responsible of an ectopic meatus of the urethra. This congenital anomaly results in a fusion defect of the two epithelial surfaces of the urethral groove between the 11th and the 18th weeks of development. The earlier this process arrests, the more the form is proximal and severe. This is the second genital malformation in boys with 1 case per 250 male births. Its origin is often multifactorial (genetic, endocrine, placental and environmental)...
October 2016: Annales de Chirurgie Plastique et Esthétique
https://www.readbyqxmd.com/read/26392541/plasma-dna-tissue-mapping-by-genome-wide-methylation-sequencing-for-noninvasive-prenatal-cancer-and-transplantation-assessments
#5
Kun Sun, Peiyong Jiang, K C Allen Chan, John Wong, Yvonne K Y Cheng, Raymond H S Liang, Wai-kong Chan, Edmond S K Ma, Stephen L Chan, Suk Hang Cheng, Rebecca W Y Chan, Yu K Tong, Simon S M Ng, Raymond S M Wong, David S C Hui, Tse Ngong Leung, Tak Y Leung, Paul B S Lai, Rossa W K Chiu, Yuk Ming Dennis Lo
Plasma consists of DNA released from multiple tissues within the body. Using genome-wide bisulfite sequencing of plasma DNA and deconvolution of the sequencing data with reference to methylation profiles of different tissues, we developed a general approach for studying the major tissue contributors to the circulating DNA pool. We tested this method in pregnant women, patients with hepatocellular carcinoma, and subjects following bone marrow and liver transplantation. In most subjects, white blood cells were the predominant contributors to the circulating DNA pool...
October 6, 2015: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/26192403/different-procoagulant-activity-of-therapeutic-mesenchymal-stromal-cells-derived-from-bone-marrow-and-placental-decidua
#6
Guido Moll, Lech Ignatowicz, Rusan Catar, Christian Luecht, Behnam Sadeghi, Osama Hamad, Philipp Jungebluth, Duska Dragun, Artur Schmidtchen, Olle Ringdén
While therapeutic mesenchymal stromal/stem cells (MSCs) have usually been obtained from bone marrow, perinatal tissues have emerged as promising new sources of cells for stromal cell therapy. In this study, we present a first safety follow-up on our clinical experience with placenta-derived decidual stromal cells (DSCs), used as supportive immunomodulatory and regenerative therapy for patients with severe complications after allogeneic hematopoietic stem cell transplantation (HSCT). We found that DSCs are smaller, almost half the volume of MSCs, which may favor microvascular passage...
October 1, 2015: Stem Cells and Development
https://www.readbyqxmd.com/read/26117290/angiogenic-factors-and-inflammation-in-steroid-refractory-acute-graft-vs-host-disease
#7
REVIEW
Shernan G Holtan, Mukta Arora
Steroid-refractory acute graft-vs-host disease (aGVHD) remains a frequent and often fatal complication of allogeneic hematopoietic cell transplantation. Recent evidence suggests that angiogenic factors-growth factors that contribute to blood vessel development-may be involved in tissue healing and restitution after inflammatory insults such as aGVHD. However, some angiogenic factors may also be involved in inflammation and worsen clinical outcomes. In this review, we summarize the data relevant to angiogenic factors that may contribute to healing after aGVHD (epidermal growth factor and vascular endothelial growth factor A) and angiogenic factors that may promote inflammation after aGVHD (placental growth factor and follistatin)...
January 2016: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/26092352/optimization-of-optical-and-mechanical-properties-of-real-architecture-for-3-dimensional-tissue-equivalents-towards-treatment-of-limbal-epithelial-stem-cell-deficiency
#8
Isobel Massie, Alvena K Kureshi, Stefan Schrader, Alex J Shortt, Julie T Daniels
Limbal epithelial stem cell (LESC) deficiency can cause blindness. Transplantation of cultured human limbal epithelial cells (hLE) on human amniotic membrane (HAM) can restore vision but clinical graft manufacture can be unreliable. We have developed a reliable and robust tissue equivalent (TE) alternative to HAM, Real Architecture for 3D Tissue (RAFT). Here, we aimed to optimize the optical and mechanical properties of RAFT TE for treatment of LESC deficiency in clinical application. The RAFT TE protocol is tunable; varying collagen concentration and volume produces differing RAFT TEs...
September 2015: Acta Biomaterialia
https://www.readbyqxmd.com/read/26080207/evaluation-of-amniotic-multipotential-tissue-matrix-to-augment-healing-of-demineralized-bone-matrix-in-an-animal-calvarial-model
#9
Petros Konofaos, Dana Petersen, Jessica A Jennings, Richard A Smith, Heather Doty, Benjamin T Reves, Teja Guda, Mark R Appleford, Joel D Bumgardner, Robert D Wallace
Amniotic multipotential tissue matrix (AmnioMTM) is a membrane material derived from placental tissues and rich in growth factors that have been reported to have potential in healing bone. This study hypothesized that demineralized bone matrix (DBM) supplemented with AmnioMTM would accelerate healing and bone formation as compared with DBM alone in a critical size (10 mm) rat calvarial bone defect model. Five DBM grafts and 5 DBM supplemented with AmnioMTM grafts were implanted in a 10-mm critical sized defect in 10 rats (1 implant per rat)...
June 2015: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/25965119/efficacy-of-human-chorion-membrane-allograft-for-recession-coverage-a-case-series
#10
Janice Esteves, K M Bhat, Betsy Thomas, M V Jothi, Tanya Jadhav
INTRODUCTION: Human placental membranes have been used in the field of medicine for skin grafts, treatment of burns, ulcerated skin conditions etc. with great success. The use of placental allografts in dentistry is a more recent development, with the first commercial product being made available in 2008. The unique inherent biologic properties enhance wound healing and may propagate regeneration. CASE SERIES: Ten healthy adult patients presenting with twenty-one Millers Class I recession defects (isolated or adjacent multiple) were surgically treated with a modified coronally advanced flap and Chorion membrane for root coverage...
May 12, 2015: Journal of Periodontology
https://www.readbyqxmd.com/read/25961490/prominent-hla-g-expression-in-liver-disease-but-not-after-liver-transplantation
#11
Viviana Moroso, Bram van Cranenbroek, Shanta Mancham, Kostandinos Sideras, Patrick P C Boor, Katharina Biermann, Lisette de Vogel, Robert J de Knegt, Annemiek van der Eijk, Luc J W van der Laan, Jeroen de Jonge, Herold J Metselaar, Irma Joosten, Jaap Kwekkeboom
BACKGROUND: HLA-G is a nonclassical MHC class I molecule and its physiological expression restricted to placental extravillous trophoblasts contributes to maternal tolerance to the semiallogeneic fetus. Aberrant expression of HLA-G in human organ grafts has been proposed to contribute to graft acceptance. METHODS: We studied HLA-G expression in liver tissue and serum of adult liver transplant recipients before, early, and late after transplantation in relation to liver function and operational tolerance...
December 2015: Transplantation
https://www.readbyqxmd.com/read/25759146/circulating-angiogenic-factors-associated-with-response-and-survival-in-patients-with-acute-graft-versus-host-disease-results-from-blood-and-marrow-transplant-clinical-trials-network-0302-and-0802
#12
MULTICENTER STUDY
Shernan G Holtan, Michael R Verneris, Kirk R Schultz, Laura F Newell, Gabrielle Meyers, Fiona He, Todd E DeFor, Gregory M Vercellotti, Arne Slungaard, Margaret L MacMillan, Sarah A Cooley, Bruce R Blazar, Angela Panoskaltsis-Mortari, Daniel J Weisdorf
Circulating angiogenic factors (AF) reflect tissue healing capacity, although some AF can also contribute to inflammation and are indicative of endothelial dysfunction. The AF milieu in acute graft-versus-host disease (aGVHD) has not been broadly characterized. We hypothesized that patients with abundant AF involved in repair/regeneration versus those mediating damage/inflammation would have improved outcomes. Circulating AF known predominantly for repair/regeneration (epidermal growth factor [EGF], fibroblast growth factor-1 and -2, heparin binding-EGF-like growth factor, and vascular endothelial growth factor-A [VEGF-A], -C, and -D) and for damage/inflammation (angiopoietin-2, endothelin-1, soluble endoglin [sEng], follistatin [FS], leptin, and placental growth factor [PlGF]) were measured in a discovery set of hematopoietic cell recipients with grade III and IV aGVHD and compared with controls, then validated in 2 aGVHD cohorts enrolled in Blood and Marrow Transplant Clinical Trials Network (BMT CTN) trials 0302 (n = 105, serum) and 0802 (n = 158, plasma) versus controls without aGVHD (n = 53, serum)...
June 2015: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/25751191/methylation-status-of-the-chromosome-arm-19q-microrna-cluster-in-sporadic-and-androgenetic-biparental-mosaicism-associated-hepatic-mesenchymal-hamartoma
#13
Rachel B Keller, Dina El Demellawy, Alberto Quaglia, Milton Finegold, Raj P Kapur
The C19MC gene on chromosome band 19q13.4 encodes a cluster of 46 microRNAs; those microRNAs are normally only expressed from the paternal allele and in the placenta. Placental expression correlates with selective demethylation of the paternal C19MC promoter, in contrast to methylation of both maternal and paternal alleles in nonplacental tissues. Prior investigations demonstrated "ectopic" activation of this gene in most hepatic mesenchymal hamartomas, including sporadic tumors and others with androgenetic-biparental mosaicism (subset of cells are diploid, but contain only paternally derived chromosomes)...
May 2015: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/25715804/in-vivo-generation-of-a-mature-and-functional-artificial-skeletal-muscle
#14
Claudia Fuoco, Roberto Rizzi, Antonella Biondo, Emanuela Longa, Anna Mascaro, Keren Shapira-Schweitzer, Olga Kossovar, Sara Benedetti, Maria L Salvatori, Sabrina Santoleri, Stefano Testa, Sergio Bernardini, Roberto Bottinelli, Claudia Bearzi, Stefano M Cannata, Dror Seliktar, Giulio Cossu, Cesare Gargioli
Extensive loss of skeletal muscle tissue results in mutilations and severe loss of function. In vitro-generated artificial muscles undergo necrosis when transplanted in vivo before host angiogenesis may provide oxygen for fibre survival. Here, we report a novel strategy based upon the use of mouse or human mesoangioblasts encapsulated inside PEG-fibrinogen hydrogel. Once engineered to express placental-derived growth factor, mesoangioblasts attract host vessels and nerves, contributing to in vivo survival and maturation of newly formed myofibres...
April 2015: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/25395422/boost-and-loss-of-immune-responses-against-tumor-associated-antigens-in-the-course-of-pregnancy-as-a-model-for-allogeneic-immunotherapy
#15
Mathias Lutz, Andrea Worschech, Miriam Alb, Sabine Gahn, Laura Bernhard, Michael Schwab, Stefanie Obermeier, Hermann Einsele, Ulrike Kämmerer, Peter Heuschmann, Erdwine Klinker, Christoph Otto, Stephan Mielke
Donor-derived immunity against tumor-associated antigens (TAAs) may exert selective antileukemic activity reprieving the allogeneic recipient from graft-versus-host disease. As TAAs are highly expressed in placental tissues we hypothesized that pregnancy could drive respective immunity in healthy individuals. Thus, we investigated the frequency and level of immune responses against clinically relevant TAAs in 114 blood donors and 44 women during their first pregnancy. Quantitative reverse-transcription polymerase chain reaction was employed to detect low levels of interferon-γ after primary peptide stimulation of CD8(+) T lymphocytes...
January 8, 2015: Blood
https://www.readbyqxmd.com/read/25095509/injury-induced-allograft-rejection-a-rendezvous-with-evolution
#16
Walter G Land
Modern immunology, in many ways, is based on three major paradigms: the clonal selection theory, the pattern recognition theory, and the danger/injury theory. The last theory holds that any cell stress and tissue injury, including allograft injury, via induction of damage-associated molecular patterns, induces immunity, including alloimmunity, leading to allograft rejection. On the other hand, the concept precludes that non-self per se induces immunity as proposed by the two former theories. Recently, the danger/injury model has gained considerable acceptance by immunologists, in particular as promoted by new insights into the function of the mammalian gut microbiota, representing a huge assemblage of non-self...
2013: Clinical Transplants
https://www.readbyqxmd.com/read/25062621/hematopoietic-stem-and-progenitor-cell-mobilization-in-mice
#17
Jonathan Hoggatt, Tiffany A Tate, Louis M Pelus
Hematopoietic stem cell transplantation (HSCT) can be performed with hematopoietic stem and progenitor cells (HSPC) acquired directly from bone marrow, from umbilical cord blood or placental tissue, or from the peripheral blood after treatment of the donor with agents that enhance egress of HSPC into the circulation, a process known as "mobilization." Mobilized peripheral blood stem cells (PBSC) have become the predominate hematopoietic graft for HSCT, particularly for autologous transplants. Despite the success of PBSC transplant, many patients and donors do not achieve optimal levels of mobilization...
2014: Methods in Molecular Biology
https://www.readbyqxmd.com/read/24817999/angiogenic-properties-of-dehydrated-human-amnion-chorion-allografts-therapeutic-potential-for-soft-tissue-repair-and-regeneration
#18
Thomas J Koob, Jeremy J Lim, Michelle Massee, Nicole Zabek, Robert Rennert, Geoffrey Gurtner, William W Li
BACKGROUND: Chronic wounds are associated with a number of deficiencies in critical wound healing processes, including growth factor signaling and neovascularization. Human-derived placental tissues are rich in regenerative cytokines and have been shown in randomized clinical trials to be effective for healing chronic wounds. In this study, PURION® Processed (MiMedx Group, Marietta, GA) dehydrated human amnion/chorion membrane tissue allografts (dHACM, EpiFix®, MiMedx) were evaluated for properties to support wound angiogenesis...
2014: Vascular Cell
https://www.readbyqxmd.com/read/24676699/substantiation-of-25%C3%A2-kgy-radiation-sterilization-dose-for-banked-air-dried-amniotic-membrane-and-evaluation-of-personnel-skill-in-influencing-finished-product-bioburden
#19
Nagi Marsit, Samira Dwejen, Ibrahim Saad, Sedigh Abdalla, Arej Shaab, Salma Salem, Enas Khanfas, Anas Hasan, Mohamed Mansur, Mohamed Abdul Sammad
Preparation of amniotic membrane (AM) by air drying method followed by radiation sterilization is simple and valuable approach; sterility and quality of the final AM product are depending on the quality management system at the tissue bank. Validation and substantiation of radiation sterilization dose (RSD) for tissue allografts is an essential step for the development and validation of the standard operating procedures (SOP). Application of SOP is perfectly relying on trained staff. Skills differences among personnel involved in AM preparation could have an effect on microbiological quality of the finished product and subsequently on the RSD required...
December 2014: Cell and Tissue Banking
https://www.readbyqxmd.com/read/24664953/properties-of-dehydrated-human-amnion-chorion-composite-grafts-implications-for-wound-repair-and-soft-tissue-regeneration
#20
Thomas J Koob, Jeremy J Lim, Michelle Massee, Nicole Zabek, Guilhem Denozière
PURION(®) processed dehydrated human amnion/chorion membrane (dHACM; MiMedx Group, Marietta, GA) tissue products were analyzed for the effectiveness of the PURION(®) process in retaining the native composition of the amniotic membrane and preserving bioactivity in the resulting products. dHACM was analyzed for extracellular matrix (ECM) composition through histological staining and for growth factor content via multiplex ELISA arrays. Bioactivity was assessed by evaluating endogenous growth factor production by human dermal fibroblasts in response to dHACM and for thermal stability by mechanical tests and in vitro cell proliferation assays...
August 2014: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
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