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Pterygia

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https://www.readbyqxmd.com/read/29724886/pyroptosis-in-pterygium-pathogenesis
#1
Naiyu Sun, Hong Zhang
BACKGROUND:   Pterygium is a common ocular disease characterized by proliferating fibrovascular tissue. Pyroptosis, a recently discovered programmed cell death, is known to be associated with oxidative stress, one of the main causes of pterygia. Here, we aimed to study the role of pyroptosis in pterygium pathogenesis. METHODS:  The expression of NLRP3, caspase-1, IL-18 and IL-1β was analyzed in 60 human pterygium tissues and 60 human conjunctival epithelium tissues using qRT-PCR, western blot analysis...
May 3, 2018: Bioscience Reports
https://www.readbyqxmd.com/read/29719637/histopathological-parameters-in-pterygia-and-significant-clinical-correlations
#2
Ahmed Mohamed Reda, Yasmine Maher Mohamed Shaaban, Somaia Ahmad Saad El-Din
Purpose: To evaluate the clinical and histopathological parameters of pterygium to determine significant correlations between parameters that can affect management strategies. Methods: A total of 47 pterygia were clinically examined and excised for histopathological evaluation of epithelial and stromal changes. Some samples were immunostained with P53 (a protein of 53 kilodalton used as dysplastic epithelial marker), CD20 (CD/cluster of differentiation, are group of surface receptors providing targets for cellular immunophenotyping, CD20 as a B lymphocyte marker), CD 3 (as T lymphocyte marker) or vascular endothelial growth factor (VEGF/as vascular marker)...
April 2018: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/29563842/recurrent-pterygium-treatment-using-mitomycin-c-double-amniotic-membrane-transplantation-and-a-large-conjunctival-flap
#3
Yu Monden, Fumi Hotokezaka, Ryoji Yamakawa
Purpose: The aim of this study was to evaluate the clinical outcomes of surgery for recurrent pterygia using mitomycin C (MMC), double amniotic membrane transplantation (AMT), and a large conjunctival flap. Patients and methods: This retrospective case series included 31 eyes in 31 patients with recurrent pterygia. All patients underwent pterygium excision, application of MMC, double AMT, and placement of a large conjunctival flap. Outcome measures were visual acuity, astigmatism, and recurrence...
2018: International Medical Case Reports Journal
https://www.readbyqxmd.com/read/29549462/risk-factors-for-pterygium-recurrence-after-limbal-conjunctival-autografting-a-retrospective-single-centre-investigation
#4
Naser Samadi Aidenloo, Qader Motarjemizadeh, Maryam Heidarpanah
PURPOSE: To determine the risk factors related to recurrence of pterygium after pterygium excision with limbal-conjunctival autograft. STUDY DESIGN: Retrospective, observational case series. METHODS: The current study included 310 patients who underwent surgical removal of pterygium using limbal-conjunctival autografting. All surgery was performed by the same surgeon at a single Hospital from 2006 to 2011. Preoperative and postoperative patient data were collected...
May 2018: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29532273/detection-of-increase-in-corneal-irregularity-due-to-pterygium-using-fourier-series-harmonic-analyses-with-multiple-diameters
#5
Keiichiro Minami, Kazunori Miyata, Atsushi Otani, Tadatoshi Tokunaga, Shouta Tokuda, Shiro Amano
PURPOSE: To determine steep increase of corneal irregularity induced by advancement of pterygium. METHODS: A total of 456 eyes from 456 consecutive patients with primary pterygia were examined for corneal topography and advancement of pterygium with respect to the corneal diameter. Corneal irregularity induced by the pterygium advancement was evaluated by Fourier harmonic analyses of the topographic data that were modified for a series of analysis diameters from 1 mm to 6 mm...
May 2018: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/29443763/epibulbar-complex-cartilaginous-choristoma-a-distinctive-clinicopathological-case-series-and-literature-review
#6
Zongduan Zhang, Zhengwei Yang, Qintuo Pan, Xiaoyi Qin, Yuxuan Deng, Yuehong Cao
To newly describe the clinical and histopathological characteristics of epibulbar complex cartilaginous choristoma incidentally observed in a series of pterygium excision patients.Noncomparative case series with chart review of 8 patients.During a 4-year period, we identified 8 cases of conventional unilateral nasal subpterygial cartilaginous choristoma in 1799 pterygium patients and analyzed their clinicopathological features. The incidence rate of this entity is 0.44% in pterygium patients. All of the cartilaginous choristomas were buried deep in the caruncle, covered by the pterygium, and embedded in tenon facia tissue...
February 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29405795/oral-mucosa-grafting-in-periorbital-reconstruction
#7
Andre Grixti, Raman Malhotra
To provide an extensive literature review on the clinical indications of oral mucosa grafts (OMG) and minor salivary gland grafts (MSGG) in periorbital reconstruction together with safe practice graft harvesting techniques to minimize donor-site morbidity. A literature review was performed by searching the databases of PUBMED, EMBASE, and COCHRANE library using the keywords: minor salivary glands; oral mucosal graft; orbit; and eye. The bibliographies of the pertinent articles were examined for additional papers...
February 6, 2018: Orbit
https://www.readbyqxmd.com/read/29360447/microrna-regulation-of-mdm2-p53-loop-in-pterygium
#8
Yufei Teng, Gary Hin-Fai Yam, Na Li, Shen Wu, Arkasubhra Ghosh, Ningli Wang, Chi-Pui Pang, Vishal Jhanji
PURPOSE: The pathogenesis of pterygium has been linked to limbal stem cell damage, abnormal apoptosis and cellular proliferation. In this study, we investigated the epigenetic regulation through microRNA expression in the pathogenesis of pterygium. METHODS: Human full-length primary pterygia were microdissected into head and body regions. Specific microRNA and mRNA expression was assayed by TaqMan® real-time quantitative polymerase chain reaction (qPCR). Tissue localization of target microRNAs was performed by LNA-based in situ hybridization...
April 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29317263/keratinocyte-specific-ablation-of-ripk4-allows-epidermal-cornification-but-impairs-skin-barrier-formation
#9
Corinne Urwyler-Rösselet, Giel Tanghe, Kirsten Leurs, Barbara Gilbert, Riet De Rycke, Michiel De Bruyne, Saskia Lippens, Sonia Bartunkova, Philippe De Groote, Carien Niessen, Marek Haftek, Peter Vandenabeele, Wim Declercq
In humans, receptor-interacting protein kinase 4 (RIPK4) mutations can lead to the autosomal recessive Bartsocas-Papas and popliteal pterygium syndromes, which are characterized by severe skin defects, pterygia, as well as clefting. We show here that the epithelial fusions observed in RIPK4 full knockout (KO) mice are E-cadherin dependent, as keratinocyte-specific deletion of E-cadherin in RIPK4 full KO mice rescued the tail-to-body fusion and fusion of oral epithelia. To elucidate RIPK4 function in epidermal differentiation and development, we generated epidermis-specific RIPK4 KO mice (RIPK4EKO )...
January 6, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29285278/relationship-between-expression-of-cyclooxygenase-2-and-neovascularization-in-human-pterygia
#10
Dongwei Liu, Chang Peng, Zhengxuan Jiang, Liming Tao
In present study, we are to test the relationship between cyclooxygenase 2 (COX-2) and angiogenesis in pterygium tissues from a group of Chinese patients. Here forty-five primary pterygium tissues and twenty-three normal bulbar conjunctival tissues were obtained during ophthalmologic surgeries. The primary pterygium samples were treated for the immunohistochemical evaluation of COX-2, CD31 and vascular endothelial growth factor (VEGF) antibodies for different tissues. In order to evaluate the relationship between COX-2 and neovascularization, a statistical analysis was performed using the SPSS 13...
December 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/29274205/arthrogryposis-and-pterygia-as-lethal-end-manifestations-of-genetically-defined-congenital-myopathies
#11
Atif A Ahmed, Priya Skaria, Nicole P Safina, Isabelle Thiffault, Alex Kats, Eugenio Taboada, Sultan Habeebu, Carol Saunders
Arthrogryposis multiplex congenita affects approximately 1 in 3,000 individuals of different ethnic backgrounds and displays an equal incidence in males and females. The underlying mechanism for congenital contracture of the joints is decreased fetal movement during intrauterine development. This disorder is associated with over 400 medical conditions and 350 known genes that display considerable variability in phenotypic expression. In this report, four fetal or perinatal autopsy cases of arthrogryposis were studied by gross morphology, microscopic histopathologic examination, and whole genome sequencing of postmortem DNA...
February 2018: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/29178448/expanding-the-clinical-spectrum-of-phenotypes-caused-by-pathogenic-variants-in-plod2
#12
Gabriela Ferraz Leal, Gen Nishimura, Ulrika Voss, Débora Romeo Bertola, Eva Åström, Johan Svensson, Guilherme Lopes Yamamoto, Anna Hammarsjö, Eva Horemuzova, Nikos Papadiogannakis, Erik Iwarsson, Giedre Grigelioniene, Emma Tham
Osteogenesis imperfecta (OI) is a strikingly heterogeneous group of disorders with a broad range of phenotypic variations. It is also one of the differential diagnoses in bent bone dysplasias along with campomelic dysplasia and thanatophoric dysplasia and can usually be distinguished by decreased bone mineralization and bone fractures. Bent bone dysplasias also include syndromes such as kyphomelic dysplasia (MIM:211350) and mesomelic dysplasia Kozlowski-Reardon (MIM249710), both of which have been under debate regarding whether or not they are a real entity or simply a phenotypic manifestation of another dysplasia including OI...
November 27, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29164949/local-pro-inflammatory-cytokine-and-nitric-oxide-responses-are-elevated-in-patients-with-pterygium
#13
S Zidi, F Bediar-Boulaneb, H Belguendouz, M Belkhelfa, O Medjeber, O Laouar, C Henchiri, C Touil-Boukoffa
Pterygium is a common ocular surface disease observed in humans. Chronic ultraviolet (UV) exposure is extensively recognized as an aetiological factor in the pathogenesis of this disease. This hypothesis is sustained by epidemiological and histopathological data in relation to UV injured skin. Although some findings have indicated that genetic factors, anti-apoptotic and immunological mechanisms are involved in the pathogenesis of pterygium, the mechanism by which it develops remains poorly understood. In this study, we analysed the in vivo production of IL-17A, IL-6, IL-10 and nitric oxide (NO) in the tears and sera from Algerian patients...
December 2017: International Journal of Immunopathology and Pharmacology
https://www.readbyqxmd.com/read/29124395/non-invasive-detection-of-hpv-dna-in-exfoliative-samples-from-ophthalmic-pterygium-a-feasibility-study
#14
Αikaterini K Chalkia, Stavros Derdas, Georgios Bontzos, George Sourvinos, Εfstathios T Detorakis
PURPOSE: The evaluation of a non-invasive detection method for human papilloma virus (HPV) in ophthalmic pterygia. METHODS: Cotton swab samples and corresponding tissue specimens were collected from 21 ophthalmic pterygia of 21 patients. HPV detection and typing were performed by real-time PCR. Discrepancies in HPV detection between swab and tissue samples as well as clinical correlations of findings were examined. RESULTS: HPV DNA was detected in 9 (42...
January 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29080063/validity-of-a-new-comprehensive-pterygia-grading-scale-for-use-in-clinical-research-and-clinical-trial
#15
Ping Huang, Jianyan Huang, Tudor Tepelus, Jyotsna Maram, Srinivas Sadda, Olivia L Lee
PURPOSE: To determine the reliability and agreement of a new comprehensive pterygium grading scale for use in clinical research and clinical trials. METHODS: Thirty eyes with pterygia were enrolled in this study. Primary gaze position and lateral gaze position images were taken of each eye with a modified single-lens reflex camera system. Our grading scale includes five parameters: two hyperemia parameters of pterygia on two different gaze position images and three size parameters, quantifying length, width, and area of the cornea encroachment of pterygium, using ImageJ software...
October 27, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28969169/sutureless-glue-less-conjunctival-autograft-versus-conjunctival-autograft-with-sutures-for-primary-advanced-pterygia-an-interventional-pilot-study
#16
Tanie Natung, Avonuo Keditsu, Wakaru Shullai, Prasanta Kumar Goswami
INTRODUCTION: Conjunctival Autograft (CAG) in pterygium surgery can be attached by sutures or fibrin glue or autologous in situ blood coagulum. Recurrence rate and other parameters related to pterygium surgery between CAG with sutures and autologous in situ blood coagulum have not been compared uniformly in advanced pterygia alone. AIM: To compare and evaluate the outcome of sutureless, glue-less CAG with autologous in situ blood coagulum versus CAG with sutures for primary, advanced pterygium...
August 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28938377/long-term-stability-of-keratometry-scheimpflug-derived-true-net-power-and-total-corneal-refractive-power-after-primary-pterygium-excision
#17
Ka Wai Kam, Timothy A Kuan, Michael W Belin, Alvin L Young
PURPOSE: To evaluate long-term changes in mean keratometry, astigmatism, true net power (TNP), and total corneal refractive power (TCRP) of corneas after primary pterygium excision. METHODS: This is a prospective observational series conducted at a tertiary teaching hospital eye center in Hong Kong. A total of 31 eyes of 31 patients with primary pterygium excision were included. Patients with recurrent or double-headed pterygia or a history of corneal scars from previous trauma, infection, or surgery were excluded...
November 2017: Cornea
https://www.readbyqxmd.com/read/28922327/releasable-single-suture-for-primary-pterygium-excision-with-a-conjunctival-autograft
#18
Gautam Singh Parmar, Sachin Arya, Ashok Kumar Meena, Bhushan Ghodke, Elesh Jain, Budhendra Jain
PURPOSE: To evaluate the efficacy of a releasable single suture for pterygium excision with a conjunctival autograft (CAG). METHODS: Retrospective case series at a tertiary eye care center in central India was conducted. Medical records of 150 patients, who underwent primary pterygium excision with a CAG secured by a single releasable 10-0 nylon suture in the last year were reviewed. The surgical duration was noted. The suture was released on the first postoperative day under topical anesthesia...
November 2017: Cornea
https://www.readbyqxmd.com/read/28873177/hypoxia-inducible-factor-dependent-expression-of-angiopoietin-like-4-by-conjunctival-epithelial-cells-promotes-the-angiogenic-phenotype-of-pterygia
#19
Qianli Meng, Yaowu Qin, Monika Deshpande, Fabiana Kashiwabuchi, Murilo Rodrigues, Qiaozhi Lu, Hui Ren, Jennifer H Elisseeff, Gregg L Semenza, Silvia V Montaner, Akrit Sodhi
Purpose: Disappointing results from clinical studies assessing the efficacy of therapies targeting vascular endothelial growth factor (VEGF) for the treatment of pterygia suggest that other angiogenic mediators may also play a role in its development. We therefore explore the relative contribution of VEGF, hypoxia-inducible factor (HIF)-1α (the transcription factor that regulates VEGF expression in ocular neovascular disease), and a second HIF-regulated mediator, angiopoietin-like 4 (ANGPTL4), to the angiogenic phenotype of pterygia...
September 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28844049/pterygia-are-indicators-of-an-increased-risk-of-developing-cutaneous-melanomas
#20
Julie M Crewe, Tim Threlfall, Antony Clark, Paul G Sanfilippo, David A Mackey
AIM: To investigate whether pterygium is an indicator of an increased risk of cutaneous melanoma (CM). METHODS: A matched-cohort study, using linked health administrative data sets to identify all hospital-treated pterygium in Western Australia (WA) between 1979 and 2014. We identified pterygium cases from hospital diagnosis and/or procedure International Classification of Diseases 9th revision (ICD-9) and 10th revision (ICD-10) codes and matched cases by age, sex and residential postcode to WA Electoral Roll controls with no known history of pterygium...
April 2018: British Journal of Ophthalmology
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