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https://www.readbyqxmd.com/read/28453437/umbilical-cord-as-human-cell-source-for-mitral-valve-tissue-engineering-venous-vs-arterial-cells
#1
Axel Malischewski, Ricardo Moreira, Luis Hurtado, Valentine Gesché, Thomas Schmitz-Rode, Stefan Jockenhoevel, Petra Mela
Around 2% of the population in developed nations are affected by mitral valve disease and available valvular replacements are not designed for the atrioventricular position. Recently our group developed the first tissue-engineered heart valve (TEHV) specifically designed for the mitral position - the TexMi valve. The valve recapitulates the main components of the native valve, i.e. annulus, asymmetric leaflets and the crucial chordae tendineae. In the present study, we evaluated the human umbilical cord as a clinically applicable cell source for the TexMi valve...
April 28, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28449498/trans-tracheostomy-repair-of-tracheo-esophageal-fistula-under-endoscopic-view-in-a-75-year-old-woman
#2
Francesco Paolo Caronia, Alfonso Reginelli, Mario Santini, Roberto Alfano, Sebastiano Trovato, Ettore Arrigo, Alfonso Fiorelli
Tracheo-esophageal fistula is a life-threatening condition for fatal pulmonary complications. Surgery is the treatment of choice. Unfortunately, the most of patients are unfit for surgery and in these cases there is no a standardized management. Herein, we reported a clinical case of a 75-year-old-woman with a tracheoesophageal fistula related to tracheostomy. The fistula was localized 3.5 cm below the vocal folds and extended 3 cm distally. The patient's poor clinical condition contraindicated surgery while the characteristics of fistula prevented any successfully endoscopic repair with standard methods as application of fibrin glue, clipping, or stenting...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28448728/does-an-injection-of-adipose-derived-mesenchymal-stem-cells-loaded-in-fibrin-glue-influence-rotator-cuff-repair-outcomes-a-clinical-and-magnetic-resonance-imaging-study
#3
Yong Sang Kim, Chang Hun Sung, Sung Hoon Chung, Sang Joon Kwak, Yong Gon Koh
BACKGROUND: The mesenchymal stem cell (MSC)-based tissue engineering approach has been developed to improve the treatment of rotator cuff tears. Hypothesis/Purpose: The purpose was to determine the effect of an injection of adipose-derived MSCs loaded in fibrin glue during arthroscopic rotator cuff repair on clinical outcomes and to evaluate its effect on structural integrity using magnetic resonance imaging (MRI). The hypothesis was that the application of adipose-derived MSCs would improve outcomes after the surgical repair of a rotator cuff tear...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28448053/automated-contraction-analysis-of-human-engineered-heart-tissue-for-cardiac-drug-safety-screening
#4
Ingra Mannhardt, Umber Saleem, Anika Benzin, Thomas Schulze, Birgit Klampe, Thomas Eschenhagen, Arne Hansen
Cardiac tissue engineering describes techniques to constitute three dimensional force-generating engineered tissues. For the implementation of these procedures in basic research and preclinical drug development, it is important to develop protocols for automated generation and analysis under standardized conditions. Here, we present a technique to generate engineered heart tissue (EHT) from cardiomyocytes of different species (rat, mouse, human). The technique relies on the assembly of a fibrin-gel containing dissociated cardiomyocytes between elastic polydimethylsiloxane (PDMS) posts in a 24-well format...
April 15, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28445754/probing-the-dynamics-of-clot-bound-thrombin-at-venous-shear-rates
#5
Laura M Haynes, Thomas Orfeo, Kenneth G Mann, Stephen J Everse, Kathleen E Brummel-Ziedins
In closed system models of fibrin formation, exosite-mediated thrombin binding to fibrin contributes to clot stability and is resistant to inhibition by antithrombin/heparin while still susceptible to small, active-site inhibitors. Each molecule of fibrin can bind ∼1.6 thrombin molecules at low-affinity binding sites (Kd = 2.8 μM) and ∼0.3 molecules of thrombin at high-affinity binding sites (Kd = 0.15 μM). The goal of this study is to assess the stability of fibrin-bound thrombin under venous flow conditions and to determine both its accessibility and susceptibility to inhibition...
April 25, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28445073/plasminogen-activator-inhibitor-1-is-critical-in-alcohol-enhanced-acute-lung-injury-in-mice
#6
Lauren G Poole, Veronica L Massey, Deanna L Siow, Edilson Torres-González, Nikole L Warner, James P Luyendyk, Jeffrey D Ritzenthaler, Jesse Roman, Gavin E Arteel
RATIONALE: Chronic alcohol exposure is a clinically important risk factor for development of acute respiratory distress syndrome, the most severe form of acute lung injury (ALI). However, the mechanisms by which alcohol sensitizes the lung to development of this disease are poorly understood. OBJECTIVES: We determined the role of the anti-fibrinolytic protein plasminogen activator inhibitor-1 (PAI-1) in alcohol enhancement of experimental endotoxin-induced ALI. METHODS: Wild-type (WT), PAI-1(-/-) and Integrin β3(-/-) mice were fed ethanol-containing Lieber-DeCarli liquid or control diet for 6 weeks followed by systemic lipopolysaccharide (LPS) challenge...
April 26, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28443984/antifungal-activity-of-caspofungin-in-experimental-infective-endocarditis-caused-by-candida-albicans
#7
Gerardo Becerra Victorio, Lorena Michele Brennan Bourdon, Leonel García Benavides, Selene G Huerta-Olvera, Arturo Plascencia, José Villanueva, Erika Martinez-Lopez, Iván Isidro Hernández-Cañaveral
BACKGROUND: Infective endocarditis is a disease characterised by heart valve lesions, which exhibit extracellular matrix proteins that act as a physical barrier to prevent the passage of antimicrobial agents. The genus Candida has acquired clinical importance given that it is increasingly being isolated from cases of nosocomial infections. OBJECTIVE: To evaluate the activity of caspofungin compared to that of liposomal amphotericin B against Candida albicans in experimental infective endocarditis...
May 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28443287/brachial-approach-as-an-alternative-technique-of-fibrin-sheath-removal-for-implanted-venous-access-devices
#8
Charalampos Sotiriadis, Steven David Hajdu, Francesco Doenz, Salah D Qanadli
Implanted venous access device (IVAD) late dysfunction is commonly caused by fibrin sheath formation. The standard method of endovascular fibrin sheath removal is performed via the femoral vein. However, it is not always technically feasible and sometimes contraindicated. Moreover, approximately 4-6 h of bed rest is necessary after the procedure. In this article, we describe an alternative method of fibrin sheath removal using the brachial vein approach in a young woman receiving chemotherapy for breast cancer...
2017: Frontiers in Surgery
https://www.readbyqxmd.com/read/28442910/targeted-delivery-of-thymosin-beta-4-to-the-injured-myocardium-using-creka-conjugated-nanoparticles
#9
Zheyong Huang, Yanan Song, Zhiqing Pang, Bo Zhang, Hongbo Yang, Hongtao Shi, Jing Chen, Hui Gong, Juying Qian, Junbo Ge
PURPOSE: Thymosin beta 4 (Tβ4) has multiple beneficial facets for myocardial injury, but its efficiency is limited by the low local concentration within the infarct. Here, we established a Tβ4 delivery system for cardiac repair based on the interaction between the abundant fibrin in the infarct zone and the fibrin-targeting moiety clot-binding peptide cysteine-arginine-glutamic acid-lysine-alanine (CREKA). METHODS AND RESULTS: CREKA and Tβ4 were conjugated to nanoparticles (CNP-Tβ4)...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28442851/acceptance-of-fibrin-glue-fixation-in-lichtenstein-hernia-repair-a-faraway-dream
#10
Debajyoti Mohanty, Nitinkumar Borkar
No abstract text is available yet for this article.
April 2017: Indian Journal of Surgery
https://www.readbyqxmd.com/read/28442165/technical-tips-to-enhance-micrografting-results-in-burn-surgery
#11
Si Jack Chong, Abby Choke, Bien-Keem Tan
The lack of autograft donor site is one of the greatest limiting factors for the treatment of extensive burn. Micrografting is an important revolution in burn surgery where autografts are cut into small pieces for wide and rapid coverage of burn wound. Our early experiences with the current standard micrografting technique were fraught with poor graft take as well being time and labor intensive. We have improvised our technique, where we combined the use of allograft to serve as a carrier for the micrograft...
April 22, 2017: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/28441086/hematopoietic-to-mesenchymal-transition-of-adipose-tissue-macrophages-is-regulated-by-integrin-%C3%AE-1-and-fabricated-fibrin-matrices
#12
Kathleen M Gavin, Susan M Majka, Wendy M Kohrt, Heidi L Miller, Timothy M Sullivan, Dwight J Klemm
Some bona fide adult adipocytes arise de novo from a bone marrow-derived myeloid lineage. These studies further demonstrate that adipose tissue stroma contains a resident population of myeloid cells capable of adipocyte and multilineage mesenchymal differentiation. These resident myeloid cells lack hematopoietic markers and express mesenchymal and progenitor cell markers. Because bone marrow mesenchymal progenitor cells have not been shown to enter the circulation, we hypothesized that myeloid cells acquire mesenchymal differentiation capacity in adipose tissue...
April 3, 2017: Adipocyte
https://www.readbyqxmd.com/read/28439440/a-comparison-of-the-effects-of-20-mannitol-and-3-nacl-on-coagulation-parameters-in-vitro-using-rotem-a-prospective-randomized-crossover-study
#13
Achmet Ali, Bilge Şencan, Pulat Akın Sabancı, Demet Altun, Aylin Tetik, Lerzan Recep Doğan, İbrahim Özkan Akıncı
OBJECTIVE: The aim of the present study is to compare the effect of 20% mannitol and 3% NaCl on blood coagulation in vitro using rotational thromboelastometry (ROTEM). METHODS: Twenty-millilitre blood samples were obtained from 15 volunteers. In each group, 2 mL blood samples were collected into both polypropylene tubes and EDTA tubes for ROTEM and hemogram analysis. After sampling, blood samples were diluted with test solutions. Group C (control): Only blood, Group M (mannitol): 7% vol 20% mannitol concentration in the blood, Group hypertonic saline (HS): 7% vol 3% hypertonic saline (NaCl) in the blood, Group M/H (mannitol and hydroxyethyl starch solutions [HES]): 6% vol 20% mannitol concentration and 8% vol HES in the blood and Group HS/H (hypertonic saline and HES): 6% vol 3% hypertonic saline concentration and 8% vol HES in the blood...
April 2017: Turkish Journal of Anaesthesiology and Reanimation
https://www.readbyqxmd.com/read/28439253/secondary-hematoma-expansion-and-perihemorrhagic-edema-after-intracerebral-hemorrhage-from-bench-work-to-practical-aspects
#14
REVIEW
Krista Lim-Hing, Fred Rincon
Intracerebral hemorrhages (ICH) represent about 10-15% of all strokes per year in the United States alone. Key variables influencing the long-term outcome after ICH are hematoma size and growth. Although death may occur at the time of the hemorrhage, delayed neurologic deterioration frequently occurs with hematoma growth and neuronal injury of the surrounding tissue. Perihematoma edema has also been implicated as a contributing factor for delayed neurologic deterioration after ICH. Cerebral edema results from both blood-brain barrier disruption and local generation of osmotically active substances...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28439062/a-rare-case-of-necrotizing-myopathy-and-fibrinous-and-organizing-pneumonia-with-anti-ej-antisynthetase-syndrome-and-ssa-antibodies
#15
Muhammad Kashif, Divya Arya, Masooma Niazi, Misbahuddin Khaja
BACKGROUND Idiopathic inflammatory myopathies are autoimmune disorders that can involve the skin, joints, muscles, and lungs. The most common of these disorders are dermatomyositis, polymyositis, overlap syndrome, and inclusion body myositis. Necrotizing autoimmune myopathy is an idiopathic inflammatory myopathy that is rarely associated with Sjögren's syndrome. The most common lung findings associated with anti-EJ antisynthetase syndrome are nonspecific interstitial pneumonia and usual interstitial pneumonia; this condition is rarely associated with fibrinous and organizing pneumonia...
April 25, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28438151/effect-of-platelet-rich-fibrin-on-edema-and-pain-following-third-molar-surgery-a-split-mouth-control-study
#16
Uğur Gülşen, Mehmet Fatih Şentürk
BACKGROUND: To evaluate the efficacy of platelet-rich fibrine (PRF) on postoperative edema and pain after impacted mandibular third molar surgery. METHODS: The prospective study was comprised 30 patients who presented for the removal of bilateral impacted mandibular third molar teeth. After extraction, the sockets were filled with PRF or without PRF in the study and control groups, respectively. Postoperative edema was measured with a flexible tape measure by calculating the distance between several facial landmarks on postoperative days two and seven...
April 24, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/28438078/ten-year-follow-up-of-a-case-of-necrotizing-fasciitis-successfully-treated-with-negative-pressure-wound-therapy-dermal-regeneration-template-application-and-split-thickness-skin-autograft
#17
Sagi Martinov, Soccoro Ortiz
INTRODUCTION: Necrotizing fasciitis is a rapidly progressive and often fatal infection of the fasciae and subcutaneous tissues. PATIENT AND METHODS: In this case report, we present the treatment of a 63-year-old patient suffering from diabetes mellitus, who was admitted to the emergency unit for severe right gluteal pain, which had begun 24 hours before admission. Cutaneous symptoms, oliguria, metabolic acidosis, acute renal failure, severe hypotension, and tachycardia occurred, and the patient was admitted to Intensive Care a few hours after initial admission...
April 25, 2017: Acta Chirurgica Belgica
https://www.readbyqxmd.com/read/28437133/the-impact-of-the-centrifuge-characteristics-and-centrifugation-protocols-on-the-cells-growth-factors-and-fibrin-architecture-of-a-leukocyte-and-platelet-rich-fibrin-l-prf-clot-and-membrane
#18
David M Dohan Ehrenfest, Nelson R Pinto, Andrea Pereda, Paula Jiménez, Marco Del Corso, Byung-Soo Kang, Mauricio Nally, Nicole Lanata, Hom-Lay Wang, Marc Quirynen
L-PRF (leukocyte- and platelet-rich fibrin) is one of the four families of platelet concentrates for surgical use and is widely used in oral and maxillofacial regenerative therapies. The first objective of this article was to evaluate the mechanical vibrations appearing during centrifugation in four models of commercially available table-top centrifuges used to produce L-PRF and the impact of the centrifuge characteristics on the cell and fibrin architecture of a L-PRF clot and membrane. The second objective of this article was to evaluate how changing some parameters of the L-PRF protocol may influence its biological signature, independently from the characteristics of the centrifuge...
April 24, 2017: Platelets
https://www.readbyqxmd.com/read/28437098/interaction-of-fibrin-with-the-very-low-density-lipoprotein-receptor-further-characterization-and-localization-of-the-vldl-receptor-binding-site-in-fibrin-%C3%AE-n-domains
#19
Sergiy Yakovlev, Leonid Medved
Our recent study revealed that fibrin and the VLDL receptor (VLDLR) interact with each other through a pair of fibrin βN-domains and CR domains of the receptor and this interaction promotes transendothelial migration of leukocytes and thereby inflammation. The major objectives of the present study were to further clarify the molecular mechanism of fibrin-VLDLR interaction and to identify amino acid residues in the βN-domains involved in this interaction. Our binding experiments with the (β15-66)2 fragment, which corresponds to a pair of fibrin βN-domains, and the VLDLR(1-8) fragment consisting of eight CR domains of VLDLR, revealed that interaction between them strongly depends on ionic strength and chemical modification of all Lys or Arg residues in (β15-66)2 results in abrogation of this interaction...
April 24, 2017: Biochemistry
https://www.readbyqxmd.com/read/28436361/robotic-repair-of-vesicovaginal-fistulas-using-fibrin-sealant
#20
G Luke Machen, Leah R Chiles, John Joyce, Kristofer R Wagner
INTRODUCTION: Although infrequent, when encountered vesicovaginal fistulas (VVF) are a difficult condition for both patients and physicians alike. After the first robotic repair was described in 2005, this has been an increasingly common treatment modality. At our institution between 2009 and 2014, eleven of these patients were evaluated and treated with robotic repair. However, fibrin sealant was used in place of the traditional tissue flap. Included are six patients who had previously undergone operative repair...
April 2017: Canadian Journal of Urology
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