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Amniotic membrane graft

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https://www.readbyqxmd.com/read/29133658/role-of-amniotic-membrane-and-full-thickness-skin-graft-in-reconstruction-of-kissing-nevus-of-eyelids
#1
Manpreet Singh, Natasha Gautam, Manpreet Kaur, Zoramthara Zadeng
A 20-year-old girl presented with a large pigmented lesion over the temporal aspect of left lateral canthus involving the lateral one-third of both eyelids, since birth. A slow increase in its size had been noticed for the past 2 years. On examination, a hairy nevus measuring 34 mm × 22 mm was noticed involving left eyelid skin, the mucocutaneous junction (MCJ), palpebral conjunctiva, and lateral canthus. The surface was irregularly thick and covered with long, thick, and pigmented hairs. A clinical diagnosis of kissing nevus of eyelids was kept and a surgical resection with reconstruction planned...
November 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29107055/native-and-synthetic-scaffolds-for-limbal-epithelial-stem-cell-transplantation
#2
REVIEW
Kim N Nguyen, Samantha Bobba, Alexander Richardson, Mijeong Park, Stephanie L Watson, Denis Wakefield, Nick Di Girolamo
Limbal stem cell deficiency (LSCD) is a complex blinding disease of the cornea, which cannot be treated with conventional corneal transplants. Instead, a stem cell (SC) graft is required to replenish the limbal epithelial stem cell (LESC) reservoir, which is ultimately responsible for regenerating the corneal epithelium. Current therapies utilize limbal tissue biopsies that harbor LESCs as well as tissue culture expanded cells. Typically, this tissue is placed on a scaffold that supports the formation of corneal epithelial cell sheets, which are then transferred to diseased eyes...
October 26, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29047409/novel-approach-to-gastric-mucosal-defect-repair-using-fresh-amniotic-membrane-allograft-in-dogs-experimental-study
#3
Haithem A Farghali, Naglaa A AbdElKader, Marwa S Khattab, Huda O AbuBakr
BACKGROUND: Gastric mucosal defect could result from several causative factors including the use of nonsteroidal anti-inflammatory drugs, Helicobacter pylori infection, gastrointestinal and spinal cord diseases, and neoplasia. This study was performed to achieve a novel simple, inexpensive, and effective surgical technique for the repair of gastric mucosal defect. METHODS: Six adult male mongrel dogs were divided into two groups (three dogs each). In the control positive group (C + ve), dogs were subjected to surgical induction of gastric mucosal defect and then treated using traditional medicinal treatment for such a condition...
October 18, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28976415/amniotic-membrane-grafts-to-reduce-pterygium-recurrence
#4
Ronald Rosen
PURPOSE: To demonstrate the long-term outcome of pterygium surgery with adjunctive amniotic membrane transplantation (AMT) and intraoperative mitomycin C (MMC) in a large case series. METHODS: Medical records were retrieved for this noncomparative retrospective study of all patients who had pterygium excision with adjunctive AMT and intraoperative MMC, from October 2010 to June 2016 with at least 6 months of follow-up. RESULTS: There were a total of 556 eyes of 535 patients (291 males and 244 females) with average age of 51...
October 2, 2017: Cornea
https://www.readbyqxmd.com/read/28967074/palladium-103-plaque-radiation-therapy-for-ciliary-body-melanoma-through-a-functioning-glaucoma-filtering-bleb
#5
Arif H K Pathan, Alexander Barash, Lawrence B Tena, Paul T Finger
PURPOSE: To provide a clinical description of the long-term outcome of a 103Pd plaque-irradiated ciliary body melanoma with extrascleral extension while attempting to preserve a subadjacent glaucoma filtering bleb. METHODS: A 75-year-old woman with pseudoexfoliative glaucoma for 17 years, 16 years status post argon laser trabeculoplasty, and 15 years status post trabeculectomy in the left eye, was diagnosed with an ipsilateral ciliary body melanoma with visible extrascleral extension...
September 23, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/28947445/a-study-protocol-for-a-multicentre-randomised-clinical-trial-evaluating-the-safety-and-feasibility-of-a-bioengineered-human-allogeneic-nanostructured-anterior-cornea-in-patients-with-advanced-corneal-trophic-ulcers-refractory-to-conventional-treatment
#6
Miguel González-Andrades, Rosario Mata, María Del Carmen González-Gallardo, Santiago Medialdea, Salvador Arias-Santiago, Juliana Martínez-Atienza, Antonio Ruiz-García, Lorena Pérez-Fajardo, Antonio Lizana-Moreno, Ingrid Garzón, Antonio Campos, Miguel Alaminos, Gloria Carmona, Natividad Cuende
INTRODUCTION: There is a need to find alternatives to the use of human donor corneas in transplants because of the limited availability of donor organs, the incidence of graft complications, as well as the inability to successfully perform corneal transplant in patients presenting limbal deficiency, neo-vascularized or thin corneas, etc. We have designed a clinical trial to test a nanostructured fibrin-agarose corneal substitute combining allogeneic cells that mimics the anterior human native cornea in terms of optical, mechanical and biological behaviour...
September 24, 2017: BMJ Open
https://www.readbyqxmd.com/read/28941146/tracheal-repair-with-acellular-human-amniotic-membrane-in-a-rabbit-model
#7
Lianna Ferrari Jorge, Julio C Francisco, Nelson Bergonse, Cristina Baena, Katherine Athayde T Carvalho, Eltyeb Abdelwahid, Jose Rocha Faria Neto, Luiz Felipe Pinho Moreira, Luiz Cesar Guarita-Souza
BACKGROUND: Surgical correction of tracheal stenosis is still a complex and challenging procedure. Acellular human amniotic membranes (AHAM) represent a promising biomaterial source for tissue regeneration. The aim of this study was to evaluate whether AHAM grafts improve tissue regeneration of the trachea in a rabbit model of tracheostomy. METHODS: Twenty rabbits were randomized into two groups. Animals in the control group underwent surgical tracheostomy only and animals in the AHAM group underwent surgical tracheostomy and received an AHAM graft that covered the defect site...
September 22, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28933697/enhanced-skin-regeneration-using-a-novel-amniotic-derived-tissue-graft
#8
Katie C Mowry, Paul P Bonvallet, Susan L Bellis
BACKGROUND: Chronic and recalcitrant wounds present a significant therapeutic challenge. Amniotic tissues contain many regenerative cytokines, growth factors, and extracellular matrix molecules including proteoglycans, hyaluronic acid, and collagens I, III, and IV. Dehydrated amnion/chorion grafts are currently used to treat a variety of wounds such as diabetic foot ulcers and burns. OBJECTIVE: The investigators hypothesized that processing methodologies, dehydration, and hypothermic processing and storage of amniotic tissues would affect overall quality of wound healing; they compared dehydrated amnion/chorion (dHACM) grafts to a novel hypothermically stored amniotic membrane (HSAM) graft in a full-thickness rat wound model...
September 2017: Wounds: a Compendium of Clinical Research and Practice
https://www.readbyqxmd.com/read/28912992/giant-conjunctival-nevus-in-a-12-year-old-child
#9
Edit Tóth-Molnár, Eszter Vizvári, Ákos Skribek, András Vörös
We describe a case of a giant conjunctival nevus presented in a 12-year-old girl with suspicious clinicomorphological appearance. The lesion was noticed by the parents at the age of 3 years as a "fleshy spot" on the bulbar conjunctiva. The lesion remained unchanged until approx. 6 months before recent admission. On slit-lamp examination, a large conjunctival lesion with variegate pigmentation and indistinct margins was detected on the superonasal part of the bulbar conjunctiva of the left eye. Intralesional cysts and vessels were detected with AS-OCT examination...
2017: Case Reports in Ophthalmological Medicine
https://www.readbyqxmd.com/read/28893657/the-effect-of-adjuvant-treatment-to-prevent-and-treat-intrauterine-adhesions-a-network-meta-analysis-of-randomized-controlled-trials
#10
REVIEW
Yu Yan, Dongmei Xu
Intrauterine adhesions (IUA) can lead to partial or complete closure of the uterine cavity, which may result in symptoms including abnormal menstruation, infertility, and pelvic pain. A network meta-analysis was performed to assess the effect of adjuvant therapy on the prevention and treatment of intrauterine adhesions. We searched electronic databases, including PubMed, EmBase, and the Cochrane Library, up to May 5, 2017 without language restrictions. The primary outcomes in the present analysis were the rate of IUAs for prevention and the rate of IUA recurrence for treatment...
September 8, 2017: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/28835428/oral-mucosal-grafting-combined-with-tenonplasty-for-ocular-surface-and-lid-margin-reconstruction-in-an-atypical-sectorial-chemical-burn
#11
Swati Singh, Purvasha Narang, Vikas Mittal
A 46-year-old woman presented with chemical injury in both eyes after the instillation of undefined eye-drops prescribed by quack. She had an atypical presentation in the form of bilateral severe necrosis of both lids and whole palpebral conjunctiva. Extensive debridement with conjunctival epitheliectomy, tenonplasty and amniotic membrane transplantation (AMT) was performed. Characteristic differences from typical chemical injuries were a sectorial involvement of ocular surface and keratinisation over distorted lid margins...
August 23, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28835072/-advances-in-preparation-and-clinical-application-of-amniotic-membrane-graft
#12
S Q Zheng, T S Chen, S Z Ji, P F Luo, S C Xiao
Amniotic membrane has been used as wound dressing for more than 100 years. With the development of the preservation and preparation techniques, amniotic membrane is widely used in ophthalmology, burns, plastic surgery, dentistry, and neurosurgery. In recent years, as more and more amniotic membrane is used in chronic wounds, it will be a new treatment method for wounds. This paper is a brief review about advances in preparation and clinical application of amniotic membrane graft.
August 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28806949/case-report-of-ocular-kaposi-s-sarcoma
#13
Jing Yang, Xiao-Fang Yin, Yong-Ping Li, Shi-You Zhou
BACKGROUND: Kaposi's sarcoma (KS) is generally considered a neoplastic disorder of vascular origin and occurs in patients with acquired immunodeficiency syndrome (AIDS) or who have received immunosuppressive treatments after an organ transplant (Soulier et al., Blood 86(4):1276-80, 1995; Viejo-Borbolla and Schulz, AIDS Rev 5(4):222-9, 2003; Schulz, J Antimicrob Chemother 45(Suppl T3):15-27, 2000; Aversa et al. Crit Rev Oncol Hematol 53(3):253-65, 2005; Mbulaiteye and Engels, Int J Cancer 119(11):2685-91, 2006; Tessari et al...
August 14, 2017: BMC Ophthalmology
https://www.readbyqxmd.com/read/28770884/outcome-of-application-of-amniotic-membrane-graft-in-ocular-surface-disorders
#14
Nargis Nizam Ashraf, Muhammad Idrees Adhi
OBJECTIVE: To determine the outcome of application of amniotic graft in ocular surface disorders. METHODS: This cross-sectional study was conducted at Dow University of Health Sciences, Karachi, from January 2010 to December 2012, and comprised patients with ocular surface disorders. Patients' presenting symptoms and signs were recorded. Previously harvested and frozen amniotic graft was applied in different types of ocular surface disorders, such as corneal ulcers, pterygium, keratomalacia, Steven-Johnson syndrome, etc...
July 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28742619/use-of-topical-insulin-to-treat-refractory-neurotrophic-corneal-ulcers
#15
Angeline L Wang, Eric Weinlander, Brandon M Metcalf, Neal P Barney, David M Gamm, Sarah M Nehls, Michael C Struck
PURPOSE: To report the clinical course of 6 patients with refractory neurotrophic corneal ulcers that were treated with topical insulin drops. METHODS: Retrospective chart review of patients who had neurotrophic corneal ulcers or epithelial defects refractory to standard medical and surgical treatment. Insulin drops, prepared by mixing regular insulin in artificial tears with a polyethylene glycol and propylene glycol base at a concentration of 1 unit per milliliter, were prescribed 2 to 3 times daily...
November 2017: Cornea
https://www.readbyqxmd.com/read/28730219/histological-immunohistochemical-and-clinical-considerations-on-amniotic-membrane-transplant-for-ocular-surface-reconstruction
#16
Elena Şapte, Claudia Florida Costea, Alexandru Cărăuleanu, Cristina Dancă, Gabriela FlorenŢa Dumitrescu, Gabriela Dimitriu, Mădălina Adriana Chihaia, Cătălin Mihai Buzdugă, Andrei Cucu, Mihaela Dana Turliuc
Amniotic membrane (AM) transplantation has been used successfully worldwide in ophthalmology plastic surgery for over 100 years. This review presents the histological and the immunohistochemical features of AM compared to those of the conjunctiva and discusses the techniques of processing and preservation, its mechanism of action in ocular reconstruction, its clinical ophthalmic indications, but also advantages and limitations of grafting with this biomaterial.
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28715585/retinoic-acid-engineered-amniotic-membrane-used-as-graft-or-homogenate-positive-effects-on-corneal-alkali-burns
#17
Romain Joubert, Estelle Daniel, Nicolas Bonnin, Aurélie Comptour, Christelle Gross, Corinne Belville, Frédéric Chiambaretta, Loïc Blanchon, Vincent Sapin
Purpose: Alkali burns are the most common, severe chemical ocular injuries, their functional prognosis depending on corneal wound healing efficiency. The purpose of our study was to compare the benefits of amniotic membrane (AM) grafts and homogenates for wound healing in the presence or absence of previous all-trans retinoic acid (atRA) treatment. Methods: Fifty male CD1 mice with reproducible corneal chemical burn were divided into five groups, as follows: group 1 was treated with saline solution; groups 2 and 3 received untreated AM grafts or grafts treated with atRA, respectively; and groups 4 and 5 received untreated AM homogenates or homogenates treated with atRA, respectively...
July 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28700252/modified-allogenic-simple-limbal-epithelial-transplantation-followed-by-keratoplasty-as-treatment-for-total-limbal-stem-cell-deficiency
#18
Alfonso Vasquez-Perez, Mayank A Nanavaty
PURPOSE: To describe a modified allogenic simple limbal epithelial transplant (SLET) technique with large donor tissue explants followed by keratoplasty. METHODS: A 69-year-old with conjunctival melanoma on her left eye developed total limbal stem cell deficiency (LSCD) after multiple cycles of topical mitomycin. She also had herpes stromal keratitis while on treatment with mitomycin. She underwent modified allogenic SLET with large donor limbal tissue explants glued on the cornea directly and the amniotic membrane placed over the limbal explants...
July 12, 2017: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/28673520/similarities-between-induced-membrane-and-amniotic-membrane-novelty-for-bone-repair
#19
Florelle Gindraux, Thomas Rondot, Benoit de Billy, Narcisse Zwetyenga, Jean-Christophe Fricain, Aurélie Pagnon, Laurent Obert
Previous clinical studies have shown the efficacy of a two-stage surgical procedure - the induced membrane (IM) technique - for reconstruction of large bone defects or bone non-union. The first stage involves radical debridement and insertion of a cement spacer into the bone defect. The second stage, performed weeks to months later, consists of removing the spacer while leaving the foreign body membrane induced by the cement in place, and then filling the cavity with bone autograft. The IM has been shown to (1) act as a protective physical barrier by preventing bone autograft resorption and (2) act as a bioreactor by promoting healing through revascularisation and growth factor secretion, and by concentrating mesenchymal stem cells (MSC) with osteogenic properties...
June 23, 2017: Placenta
https://www.readbyqxmd.com/read/28586928/-biomaterials-or-donor-tissue-what-is-the-future-of-tissue-engenieering-for-cornea-reconstruction
#20
Björn O Bachmann, Stefan Schrader
For the replacement of corneal tissue, corneal grafts or amniotic membrane are still used as a standard material. Since this is biological tissue, there is only a limited standardization regarding preparation, tissue properties and behaviour after transplantation. In addition, there is a risk of disease transmission, and the availability of both human corneas and amniotic membrane is insufficient in many regions of the world, which is why alternative biomaterials have been explored for many years now. Among the natural biomaterials, materials based on collagen or keratin provide characteristics that make them good candidates for corneal tissue replacement...
June 2017: Klinische Monatsblätter Für Augenheilkunde
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