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Amniotic membranes

A V Petrayevsky, K S Trishkin
Pterygium is one of the modern problems of ophthalmology. The exact etiology and pathogenesis of this disease has not been reliably established and, as a result, there is no universal method for its recurrence-free treatment. The literature data on various methods of pterygium surgical treatment such as 'bare sclera', conjunctival autograft, limbal stem cells transplantation techniques, amniotic membrane plasty and other methods was analyzed. The advantages and disadvantages of those surgery methods were identified...
2018: Vestnik Oftalmologii
Sonja Frimmel, J Tjeerd de Faber, Rene J Wubbels, Christoph Kniestedt, Dion Paridaens
PURPOSE: To study the type, severity, management and outcome of firework-related adnexal and ocular injuries during New Year's Eve festivities. METHODS: A retrospective analysis of 123 injured patients (143 eyes) treated at the Rotterdam Eye Hospital between 2009 and 2013. All ages were included and analysed according to age, gender, active participant or bystander, laterality, location, dimension and severity of injury. Outcome parameter was the final best-corrected visual acuity...
March 13, 2018: Acta Ophthalmologica
M Garrido, C Escobar, C Zamora, C Rejas, J Varas, C Córdova, C Papuzinski, M Párraga, S San Martín, S Montedonico
Purpose: Biliary atresia precedes liver cirrhosis and liver transplantation. Amniotic membrane (AM) promotes tissue regeneration, inhibits fibrosis, and reduces inflammation. Here, we test amniotic membrane potential as a therapeutic tool against cholestatic liver fibrosis. Methods: Three groups of rats were used: sham surgery (SS), bile duct ligature (BDL), and bile duct ligature plus human amniotic membrane (BDL + AM). After surgery, animals were sacrificed at different weeks...
2018: Stem Cells International
Annalucia Carbone, Roberto Zefferino, Elisa Beccia, Valeria Casavola, Stefano Castellani, Sante Di Gioia, Valentina Giannone, Manuela Seia, Antonella Angiolillo, Carla Colombo, Maria Favia, Massimo Conese
We previously found that human amniotic mesenchymal stem cells (hAMSCs) in coculture with CF immortalised airway epithelial cells (CFBE41o- line, CFBE) on Transwell® filters acquired an epithelial phenotype and led to the expression of a mature and functional CFTR protein. In order to explore the role of gap junction- (GJ-) mediated intercellular communication (GJIC) in this rescue, cocultures (hAMSC : CFBE, 1 : 5 ratio) were studied for the formation of GJIC, before and after silencing connexin 43 (Cx43), a major component of GJs...
2018: Stem Cells International
Mazaher Gholipourmalekabadi, Alexander M Seifalian, Aleksandra M Urbanska, Mir Davood Omrani, John G Hardy, Zahra Madjd, Seyed Mahmoud Hashemi, Hossein Ghanbarian, Peiman Brouki Milan, Masoud Mozafari, Rui L Reis, Subhas C Kundu, Ali Samadikuchaksaraei
Severe burn injuries can lead to delay in healing and devastating scar formation. Attempts are made to develop a suitable skin substitute for scarless healing of such skin wounds. Currently, there is no effective strategy yet for a complete scarless healing after the thermal injuries. In our recent work we fabricate and evaluated a 3D protein-based artificial skin made from decellularized human amniotic membrane (AM) and electrospun nanofibrous silk fibroin (ESF) in vitro. We also characterize both biophysical and cell culture investigation to establish in vitro performance of the developed bilayer scaffolds...
March 12, 2018: Biomacromolecules
Kyle K Jensen, Karen Y Oh, Anne M Kennedy, Roya Sohaey
Intrauterine linear echogenicity (ILE) is a common ultrasonographic finding in the gravid uterus and has variable causes and variable maternal and fetal outcomes. Correctly categorizing ILE during pregnancy is crucial for guiding surveillance and advanced imaging strategies. Common causes of ILE include membranes in multiple gestations, uterine synechiae with amniotic sheets, and uterine duplication anomalies. Less common causes include circumvallate placenta, chorioamniotic separation, and hemorrhage between membranes...
March 2018: Radiographics: a Review Publication of the Radiological Society of North America, Inc
Nathalia Mayumi Noda-Nicolau, Jossimara Polettini, Márcia Guimarães da Silva, Morgan R Peltier, Ramkumar Menon
The polybacterial invasion of the amniotic cavity and risk of preterm birth is often due to cervicovaginal bacteria such as genital mycoplasmas (Mycoplasma hominis and Ureaplasma urealyticum) and Gardnerella vaginalis. The most studied biomarker associated with preterm birth is interleukin-6 (IL-6), a pleiotropic cytokine that performs different functions based on classical or trans-signaling mechanisms. This study evaluated the changes in IL-6 and IL-6 function associated accessory molecules by human fetal membranes to determine the functional availability of IL-6 assessment in an in vitro model of polybacterial infection...
March 2, 2018: Journal of Reproductive Immunology
Sahar Ghanmi, Moez Trigui, Walid Baya, Zoubaier Ellouz, Abdelfatteh Elfeki, Slim Charfi, Jean Christophe Fricain, Hassib Keskes
OBJECTIVE: The purpose of this study was to investigate the effect of fresh human amniotic membrane (FHAM) as a substitute of periosteum to enhance bone regeneration in critical-sized defects. METHODS: Tibial diaphyseal bone defects were created in forty New Zealand white rabbits and treated with FHAM or left empty. Treatment groups consisted of: FHAM implanted in the place of removed periosteum (FHAMP group); FHFAM implanted to fill the entire defect (FHAMF group) compared to negative control group; empty defect with removing the periosteum (NC group) and positive control group; and empty defect without removing the periosteum (PC group)...
March 7, 2018: Bone
John P Kuckelman, Joseph Kononchik, Joshua Smith, Kevin R Kniery, Jeffrey T Kay, Zachary S Hoffer, Scott R Steele, Vance Sohn
BACKGROUND: Complications from adhesions after intra-abdominal surgery accounts for ~6% of hospital admissions. Currently, hyaluronate/carboxymethylcellulose represents the main option to prevent postoperative adhesion formation. Human amniotic membrane contains inherent anti-inflammatory properties that mitigate adhesion formation. OBJECTIVE: This study aimed to evaluate adhesion generation after surgical trauma with amniotic membranes compared with standard intraperitoneal adhesion barriers...
April 2018: Diseases of the Colon and Rectum
Mariana Barbosa Dias Campelo, Joelita de Alencar Fonseca Santos, Antonio Luiz Martins Maia Filho, Daniel Cabral Leão Ferreira, Luciana Barros Sant'Anna, Rauirys Alencar de Oliveira, Leonardo Fonseca Maia, Emilia Ângela Loschiavo Arisawa
PURPOSE: To evaluate the efficacy of the application of the human amniotic membrane (HAM) on the inflammatory process, fibroblast proliferation, formation of collagenand reduction of skin wound areas in rats. METHODS: Thirty six rats were submitted to a surgical injury induction and divided into two groups (n = 18): group C (control) and T (treated with the HAM). The macroscopic evolution in the wound area and the histological characteristics of the skin samples were evaluated...
February 2018: Acta Cirúrgica Brasileira
Tobias Röck, Karl Ulrich Bartz-Schmidt, Johanna Landenberger, Matthias Bramkamp, Daniel Röck
BACKGROUND The goal of this study was to investigate numbers, indications, surgical techniques, and experiences of amniotic membrane transplantation at the University Eye Hospital Tübingen over the last 16 years. MATERIAL AND METHODS Data from all amniotic membrane transplantations from January 2001 to December 2016 were retrospectively analyzed. Data was accessed from the electronic database and the annual reports of the Eye Bank at the University Eye Hospital Tübingen. RESULTS A total of 771 amniotic membrane transplantations were performed between 2001 and 2016 at the University Eye Hospital Tübingen...
March 6, 2018: Annals of Transplantation: Quarterly of the Polish Transplantation Society
Farzaneh Chehelcheraghi, Abolfazl Abbaszadeh, Magid Tavafi
Background: Skin flap procedures are employed in plastic surgery, but failure can lead to necrosis of the flap. Studies have used bone marrow mesenchymal stem cells (BM-MSCs) to improve flap viability. BM-MSCs and acellular amniotic membrane (AAM) have been introduced as alternatives. The objective of this study was to evaluate the effect of BM-MSCs and AAM on mast cells of random skin flaps (RSF) in rats. Methods: RSFs (80 × 30 mm) were created on 40 rats that were randomly assigned to one of four groups, including (I) AAM, (II) BM-MSCs, (III) BM-MSCs/AAM, and (IV) saline (control)...
March 6, 2018: Iranian Biomedical Journal
Emma C Davies, Mary K Daly, Donna Siracuse-Lee
Purpose: We report a rare case of Phialemonium obovatum fungal keratitis in a patient sustaining a corneal laceration from impact with a piece of moldy plaster. Observations: The patient was treated with topical voriconazole with resolution of active keratitis and formation of a stromal scar. The patient's final visual acuity was 20/20 in the affected eye. Conclusions and importance: There is only one other case of Phialemonium obovatum keratitis reported in the literature...
April 2017: American Journal of Ophthalmology Case Reports
Wael Seliem, Amira M Sultan
BACKGROUND: The aim of our study is to use presepsin level in umbilical cord blood as a predictor of EONS in preterm labor with premature rupture of membranes allowing rational use of antibiotics. METHODS: All preterm infants between 24+0 and 36+6 weeks of gestation born to pregnant women with a PROM were enrolled in our study. Blood samples were obtained from clamped umbilical cords after delivery of the neonates and prior to the delivery of the placenta for CRP and presepsin detection...
March 1, 2018: Pediatrics International: Official Journal of the Japan Pediatric Society
Tian Loon Lee, Hwei Yee Lee, Johnson Choon Hwai Tan
PURPOSE: To describe a case of inflammatory Terrien's marginal degeneration (TMD) in a young Chinese girl complicated by a corneoscleral cyst who ultimately underwent surgical treatment with cyst excision, corneal patch graft and amniotic membrane graft. METHODS: Case report. RESULTS: A 12-year-old Chinese female presented initially with redness and discharge from her right eye with bilateral superior corneal thinning. The patient was diagnosed with TMD...
February 27, 2018: Cornea
Jun-Yi Wang, Dian-Qiang Wang, Xiao-Lin Qi, Jun Cheng, Li-Xin Xie
AIM: To evaluate the efficacy of modified corneal ulcer debridement in superficial fungal keratitis unresponsive to medications. METHODS: A total of 209 patients (209 eyes) with fungal keratitis, involving no more than 50% of the stromal depth and not responding to antifungal agents for 2wk, were recruited in this retrospective, noncomparative study. The patients were treated with modified corneal ulcer debridement. All visible corneal infiltrates were removed under an operating microscope to obtain a clean stromal bed and smooth incised edges...
2018: International Journal of Ophthalmology
Jossimara Polettini, Lauren S Richardson, Ramkumar Menon
OBJECTIVE: A physiologic increase of reactive oxygen species (ROS) is observed through pregnancy. ROS-induced damage to major cellular elements, specifically protein peroxidation, can lead to fetal and placental tissue senescence and inflammation often associated with normal parturition. The purpose of this study was to examine the effects of oxidative stress (OS) in inducing changes in proteins, senescence, and sterile inflammation in pregnant mice. METHODS: CD-1 mice (n = 5/group) on day 14 of gestation were subjected to minilaparotomy and the uterine horn between gestational sacs was injected with the following: saline (control), cigarette smoke extract (CSE) CSE diluted in saline and CSE + SB 203580 (SB) (a p38 mitogen-activated protein kinase (MAPK) inhibitor)...
March 2018: Placenta
C Randall Harrell, Valentin Djonov, Crissy Fellabaum, Vladislav Volarevic
The standard sterilization method for most medical devices over the past 40 years involves gamma irradiation. During sterilization, gamma rays efficiently eliminate microorganisms from the medical devices and tissue allografts, but also significantly change molecular structure of irradiated products, particularly fragile biologics such as cytokines, chemokines and growth factors. Accordingly, gamma radiation significantly alters biomechanical properties of bone, tendon, tracheal, skin, amnion tissue grafts and micronized amniotic membrane injectable products...
2018: International Journal of Medical Sciences
Louise O'Leary, Andrew Specht, Natalie Isaza, Maria Kallberg, Kathleen Barrie, Deborah Cottrell, Caryn Plummer
An approximately 2-year-old female Doberman Pinscher was referred for the evaluation of bilateral, chronic proliferative conjunctivitis. Ophthalmic examination revealed bilateral thick, opaque pseudomembranes originating from the conjunctivae that prevented visualization of the cornea and interior structures of the eye. Histopathological findings of biopsies of the pseudomembranes were consistent with ligneous conjunctivitis. Serum plasminogen activity levels were within the normal range. Treatment with topical and systemic anti-inflammatory and immunosuppressive drugs did not improve the conjunctival lesions...
February 26, 2018: Veterinary Ophthalmology
Corey T Walker, Jakub Godzik, U Kumar Kakarla, Jay D Turner, Alexander C Whiting, Peter Nakaji
BACKGROUND: Tethering after spinal surgery is caused by adhesions that arise from intradural tissue manipulation. Microsurgical detethering is the only treatment for symptomatic patients, but retethering occurs commonly and no treatment is widely available to prevent this complication. OBJECTIVE: To apply human amniotic membrane (HAM) grafts, which are immune-privileged and known to possess antifibrogenic properties, in patients requiring microsurgical detethering...
February 22, 2018: Neurosurgery
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