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Amniotic membranes

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https://www.readbyqxmd.com/read/28080168/corneal-melt-after-boston-keratoprosthesis-clinical-presentation-management-outcomes-and-risk-factor-analysis
#1
Soumaya Bouhout, Marie-Claude Robert, Sousans Deli, Mona Harissi-Dagher
PURPOSE: To determine the presentation, risk factors, and outcomes of keratolysis after Boston type I keratoprosthesis (B-KPro). METHODS: Retrospective chart review. RESULTS: A total of 16 (14%) of the 110 eyes (96 patients) which underwent B-KPro implantation developed keratolysis at an average 20 ± 11 months. Retroprosthetic membrane (RPM), infectious keratitis, and corneal dellen were identified in 31%, 25%, and 13% of corneal melts, respectively...
January 12, 2017: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/28079693/conjunctival-autograft-versus-amniotic-membrane-transplantation-following-double-pterygium-excision-a-randomized-trial
#2
Venkatesh N Prajna, Lumbini Devi, Suganya K Seeniraj, Jeremy D Keenan
No abstract text is available yet for this article.
January 11, 2017: Cornea
https://www.readbyqxmd.com/read/28079552/clinical-experience-using-dehydrated-human-amnion-chorion-membrane-allografts-for-acute-and-reconstructive-burn-care
#3
Debra Ann Reilly, Sean Hickey, Paul Glat, William C Lineaweaver, Jeremy Goverman
Amniotic membrane is immunologically privileged and is a reservoir of growth factors and cytokines known to modulate inflammation and enhance the healing process, while also possessing antimicrobial, antifibrosis, and antiscarring properties. These properties establish a strong argument for using amniotic membrane derived products as a treatment for burns. The purpose of this article is to describe the use of commercially available dehydrated human amnion/chorion membrane allografts in patients with partial-thickness and full-thickness burns...
February 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28079550/the-use-of-dehydrated-human-amnion-chorion-membranes-in-the-treatment-of-burns-and-complex-wounds-current-and-future-applications
#4
Mayer Tenenhaus
Historically, biologic materials found in nature have been used for a wide variety of medicinal purposes, although their widespread use may be limited due to challenges in obtaining and properly preparing the material for safe clinical use. Amniotic membrane has long been recognized to possess unique properties favorable for healing. Dehydrated human amnion/chorion membrane allografts are commercially available for use in multiple sizes and configurations applicable for a variety of clinical settings and presentations...
February 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28079549/contemporary-methods-allowing-for-safe-and-convenient-use-of-amniotic-membrane-as-a-biologic-wound-dressing-for-burns
#5
David N Herndon, Ludwik K Branski
Partial-thickness burns involve damage to the upper layer of skin, which leaves nerve endings exposed, and therefore represent the most painful of several categories of thermal injuries. Historically, partial-thickness burns were treated conservatively by debriding the blisters, by daily tubbing and washing, and the application of new bandages with topical medications. Human amniotic membrane has been used for centuries as a biological wound dressing. In the past 20 years, there has been an increasing body of literature addressing the use of amniotic tissue in chronic wounds and burns...
February 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28073305/human-amniotic-mesenchymal-stromal-cells-as-favourable-source-for-cartilage-repair
#6
Emma Muinos-López, Tamara Hermida-Gómez, Isaac Fuentes-Boquete, Francisco Javier de Toro-Santos, Francisco J Blanco, Silvia María Díaz-Prado
INTRODUCTION: Localized trauma-derived breakdown of the hyaline articular cartilage may progress towards osteoarthritis, a degenerative condition characterized by total loss of articular cartilage and joint function. Tissue engineering technologies encompass several promising approaches with high therapeutic potential for the treatment of these focal defects. However, most of the research in tissue engineering is focused on potential materials and structural cues, while little attention is directed to the most appropriate source of cells endowing these materials...
January 10, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28045214/neutrophil-extracellular-traps-in-acute-chorioamnionitis-a%C3%A2-mechanism-of-host-defense
#7
Nardhy Gomez-Lopez, Roberto Romero, Yaozhu Leng, Valeria Garcia-Flores, Yi Xu, Derek Miller, Sonia S Hassan
PROBLEM: Neutrophil extracellular traps (NETs) were recently described as a mechanism for microbial killing in the amniotic cavity of women with intra-amniotic infection. Such a clinical condition can result in acute chorioamnionitis, a placental lesion characterized by the infiltration of maternal neutrophils in the chorioamniotic membranes. Herein, we investigated whether these infiltrating neutrophils form NETs in the chorioamniotic membranes from women who underwent spontaneous term or preterm labor with acute chorioamnionitis...
January 3, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28039853/the-presence-of-vaginal-lactobacillus-species-does-not-contribute-to-a-measureable-difference-in-amniotic-fluid-lactate-levels-collected-from-the-vaginal-tract-of-laboring-women
#8
Beverley Hall, Diana Wong, Clare Healy, Mark B Tracy, Sally K Tracy, William D Rawlinson
Amniotic fluid lactate research is based on the hypothesis that a relationship exists between fatigued uterine muscles and raised concentrations of the metabolite lactate, which is excreted into the amniotic fluid during labor. To assess potentially confounding effects of lactate producing organisms on amniotic fluid lactate measurements, we aimed to determine if the presence of vaginal Lactobacillus species was associated with elevated levels of amniotic fluid lactate, measured from the vaginal tract of women in labor MATERIAL AND METHODS: Results from this study contribute to a large prospective longitudinal study of amniotic fluid lactate at a teaching hospital in Sydney, Australia...
December 31, 2016: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/28025631/amniotic-band-syndrome-perinatal-hospice-and-palliative-care-versus-active-management
#9
Shadi Rezai, Justin Faye, Annika Chadee, Sri Gottimukkala, Ruchi Upadhyay, Carla Lara, Benamanahalli H Rajegowda, Andrew D Corwin, Rasila V Lala, Jessica Vernon, Dilfuza Nuritdinova, Stephen Chasen, Cassandra E Henderson
Introduction. Amniotic band syndrome and sequence are a relatively rare condition in which congenital anomalies occur as a result of the adherence and entrapment of fetal parts with coarse fibrous bands of the amniotic membrane. A large percentage of reported cases have an atypical gestational history. The frequency of this obstetric complication is not affected by fetal gender, genetic abnormality, or prenatal infection. Case. A 21-year-old, G1P0 female parturient at 18 weeks and 5 days with a single intrauterine gestation during a routine ultrasound evaluation was noted to have amniotic band sequence...
2016: Case Reports in Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28018719/supra-organization-and-optical-anisotropies-of-the-extracellular-matrix-in-the-amniotic-membrane-and-limbal-stroma-before-and-after-explant-culture
#10
Gisele P Valdetaro, Marcela Aldrovani, Ivan R M Padua, Priscila C Cristovam, José A P Gomes, José L Laus
In this research we evaluated the supramolecular organizations and the optical anisotropical properties of the de-epithelialized human amniotic membrane and rabbit limbal stroma, before and after explant culture. Birefringence, monochromatic light spectral absorption and linear dichroism of the main extracellular matrix biopolymers, that is, the fibrillar collagens and proteoglycans, were investigated by polarized light microscopy combined with image analysis. Our results demonstrated that the culture procedure-induced stimuli altered the supra-organizational characteristics (in terms of collagens/proteoglycans spatial orientation and ordered-aggregational state) of the amniotic and limbal extracellular matrix, which led to changes in optical anisotropical properties...
December 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/28007491/a-novel-experimental-method-for-penile-augmentation-urethroplasty-with-a-combination-of-buccal-mucosa-and-amniotic-membrane-in-a-rabbit-model
#11
Mustafa Güneş, Muammer Altok, Özlem Özmen, Mehmet Umul, Alime Güneş, Ercan Baş, Zafer Özyildiz, Tolga Taha Sönmez, Hikmet Orhan
OBJECTIVES: To investigate the results of penile urethral reconstruction using amniotic membrane (AM) and buccal mucosa (BM) grafts, and the simultaneous use of both in a rabbit model. METHODS: A total of 28 male rabbits were divided into 4 groups according to grafting style:Group 1(AM), Group 2(BM), Group 3(BM+AM), and Group 4(sham). A standardized urethral defect was created in the three initial groups. The sham group underwent only a ventral vertical urethral incision and primary re-suturation...
December 19, 2016: Urology
https://www.readbyqxmd.com/read/28005177/-new-approaches-to-ocular-surface-reconstruction-beyond-the-cornea
#12
K Spaniol, C Holtmann, G Geerling, S Schrader
BACKGROUND: Reconstruction of the conjunctiva is an essential part of ocular surface reconstruction. Clinically applied and experimentally tested tissue- and stem-cell-based approaches are presented and evaluated. MATERIALS AND METHODS: Current literature and our own results will be presented. RESULTS: Autologous conjunctiva, mucous membrane of the mouth or nose, and amniotic membrane are routinely used for conjunctival reconstruction. Limitations are limited availability, involvement in autoimmune diseases, donor heterogeneity, and degradation in an inflamed environment...
December 22, 2016: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28003777/correlation-between-practice-location-as-a-surrogate-for-uv-exposure-and-practice-patterns-to-prevent-corneal-haze-after-photorefractive-keratectomy-prk
#13
Eman M Al-Sharif, Donald U Stone
BACKGROUND: PRK is a refractive surgery that reshapes the corneal surface by excimer laser photoablation to correct refractive errors. The effect of increased ultraviolet (UV) exposure on promoting post-PRK corneal haze has been reported in the literature; however, information is lacking regarding the effect of ambient UV exposure on physician practice patterns. The aim of this study was to evaluate the effect of ophthalmologists' practice location on their reported practice patterns to prevent post-PRK corneal haze...
October 2016: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/27999996/fresh-and-in-vitro-osteodifferentiated-human-amniotic-membrane-alone-or-associated-with-an-additional-scaffold-does-not-induce-ectopic-bone-formation-in-balb-c-mice
#14
Romain Laurent, Aurélie Nallet, Benoit de Billy, Laurent Obert, Laurence Nicod, Christophe Meyer, Pierre Layrolle, Narcisse Zwetyenga, Florelle Gindraux
The human amniotic membrane (hAM) has been successfully used as a natural carrier containing amniotic mesenchymal stromal cells, epithelial cells and growth factors. It has a little or no immunogenicity, and possesses useful anti-microbial, anti-inflammatory, anti-fibrotic and analgesic properties. It has been used for many years in several indications for soft tissue repair. We previously reported that hAM represents a natural and preformed sheet containing highly potent stem cells, and could thus be used for bone repair...
December 20, 2016: Cell and Tissue Banking
https://www.readbyqxmd.com/read/27995619/idiopathic-linear-iga-bullous-dermatosis-prognostic-factors-based-on-a-case-series-of-72-adults
#15
J Gottlieb, S Ingen-Housz-Oro, M Alexandre, S Grootenboer-Mignot, F Aucouturier, E Sbidian, E Tancrede, P Schneider, E Regnier, C Picard-Dahan, E Begon, C Pauwels, K Cury, S Hüe, C Bernardeschi, N Ortonne, F Caux, P Wolkenstein, O Chosidow, C Prost-Squarcioni
BACKGROUND: Linear IgA bullous dermatosis (LABD) is a clinically and immunologically heterogeneous, subepidermal, autoimmune blistering disease (AIBD), whose long-term evolution is poorly described. OBJECTIVES: To investigate the clinical and immunological characteristics, follow-up and prognostic factors of adult idiopathic LABD. METHODS: This retrospective study, conducted in our AIBD Referral Center, included adults, diagnosed between 1995 and 2012, with idiopathic LABD, defined as pure or predominant IgA deposits by direct immunofluorescence...
December 20, 2016: British Journal of Dermatology
https://www.readbyqxmd.com/read/27995582/denudation-of-human-amniotic-membrane-by-a-novel-process-and-its-characterisations-for-biomedical-applications
#16
R Sripriya, R Kumar
This study was aimed to investigate the suitability of a modified method to get decellularised human amniotic membrane (DHAM). The obtained membrane was subjected to physico-chemical and biological evaluations to validate its potential for biomedical applications. The human amniotic membrane was processed with detergent and alkali followed by enzymatic treatments. Hematoxylin and eosin (H&E) and Masson's trichrome staining of membrane were in accordance with conjectures: the decellularised membrane stained for extracellular matrix is rich in collagen...
December 2016: Progress in biomaterials
https://www.readbyqxmd.com/read/27995540/high-mobility-group-box-1-and-receptor-for-advanced-glycation-end-products-in-preterm-infants-with-brain-injury
#17
Hong-Yan Lu, Jiang-Lin Ma, Ji-Yan Shan, Jie Zhang, Qiu-Xia Wang, Qiang Zhang
BACKGROUND: High-mobility group box-1 (HMGB1) protein acts as an important pro-infl ammatory mediator, which is capable of activating inflammation and tissue repair. HMGB1 can bind to its receptor such as advanced glycation end products (RAGE). RAGE, in turn, can promote the production of pro-inflammatory cytokines. Soluble RAGE (sRAGE) is a truncated form of the receptor comprising the extracellular domain of RAGE and can inhibit RAGE-activation. The objective of this study was to investigate whether HMGB1 and RAGE are involved in the development of brain injury in preterm infants...
December 20, 2016: World Journal of Pediatrics: WJP
https://www.readbyqxmd.com/read/27994124/major-evolutionary-transitions-and-innovations-the-tympanic-middle-ear
#18
REVIEW
Abigail S Tucker
One of the most amazing transitions and innovations during the evolution of mammals was the formation of a novel jaw joint and the incorporation of the original jaw joint into the middle ear to create the unique mammalian three bone/ossicle ear. In this review, we look at the key steps that led to this change and other unusual features of the middle ear and how developmental biology has been providing an understanding of the mechanisms involved. This starts with an overview of the tympanic (air-filled) middle ear, and how the ear drum (tympanic membrane) and the cavity itself form during development in amniotes...
February 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/27992249/the-role-of-epithelial-to-mesenchymal-transition-in-human-amniotic-membrane-rupture
#19
Carla Janzen, Suvajit Sen, Margarida Y Y Lei, Marina Gagliardi de Assumpcao, John Challis, Gautam Chaudhuri
CONTEXT: Biochemical weakening of the amnion is a major factor preceding preterm premature rupture of membranes (PPROM), leading to preterm birth. Activation of matrix metalloproteinases (MMPs) is known to play a key role in collagen degradation of the amnion, yet epithelial to mesenchymal transition (EMT) that is also induced by MMP activation, has not been investigated as a mechanism for amnion weakening. OBJECTIVE: To measure amniotic EMT associated with vaginal delivery (VD) as compared to non-labored cesarean sections (CS), and assess changes in amniotic mechanical strength with pharmacologic inhibitors and inducers of EMT, thus testing the hypothesis that EMT is a key biochemical event that promotes amniotic rupture...
December 19, 2016: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27989573/prenatal-morphine-exposure-during-late-embryonic-stage-enhances-the-rewarding-effects-of-morphine-and-induces-the-loss-of-membrane-bound-protein-kinase-c-%C3%AE-in-intermediate-medial-mesopallium-in-the-chick
#20
Ying Wang, Yang Yao, Yuan Li, Han Nie, Xingu He
The susceptibility to drug abuse may be associated with the structural and/or functional changes in the reward-related brain regions induced by drug exposure during sensitive periods of embryonic development. Previously, we have found that prenatal morphine exposure during embryonic days 17-20 may be crucial for developing the susceptibility to morphine reward after hatching. However, the underlying structure and cellular mechanisms need further investigation. In the present study, the chicks of a few days old, which were prenatally exposed to morphine during E17-20, obviously showed higher preference for the morphine-paired chamber and hyperactivity during the expression of morphine conditioned place preference (CPP), and the reduction in membrane-bound of PKCα of the bilateral intermediate medial mesopallium (IMM) assayed immunologically...
December 15, 2016: Neuroscience Letters
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