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Pterygium

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https://www.readbyqxmd.com/read/28807717/myofibroblast-transdifferentiation-the-dark-force-in-ocular-wound-healing-and-fibrosis
#1
REVIEW
Daisy Y Shu, Frank J Lovicu
Wound healing is one of the most complex biological processes to occur in life. Repair of tissue following injury involves dynamic interactions between multiple cell types, growth factors, inflammatory mediators and components of the extracellular matrix (ECM). Aberrant and uncontrolled wound healing leads to a non-functional mass of fibrotic tissue. In the eye, fibrotic disease disrupts the normally transparent ocular tissues resulting in irreversible loss of vision. A common feature in fibrotic eye disease is the transdifferentiation of cells into myofibroblasts that can occur through a process known as epithelial-mesenchymal transition (EMT)...
August 12, 2017: Progress in Retinal and Eye Research
https://www.readbyqxmd.com/read/28803935/tnf-%C3%AE-upregulates-hif-1%C3%AE-expression-in-pterygium-fibroblasts-and-enhances-their-susceptibility-to-vegf-independent-of-hypoxia
#2
Kyoung Woo Kim, Soo Jin Lee, Jae Chan Kim
The clinical manifestations of pterygium are characterized by rapid growth and postoperative recurrences. We had previously proposed that hypoxia-inducible factor (HIF)-1α recruits progenitor cells during the development and progression of pterygia. Recently, it was reported that various stimuli, including inflammation, could activate HIF-1α even under normoxic conditions. The ocular surface directly faces external environments, and is thus frequently exposed to inflammatory insults. First, we examined the gene expression of HIF-1α, its downstream molecule, vascular endothelial growth factor (VEGF)-A, and VEGF receptor (VEGFR)-2 in corneal and conjunctival cells compared with cultured human umbilical vein endothelial cells...
August 10, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28803895/periderm-life-cycle-and-function-during-orofacial-and-epidermal-development
#3
REVIEW
Nigel L Hammond, Jill Dixon, Michael J Dixon
Development of the secondary palate involves a complex series of embryonic events which, if disrupted, result in the common congenital anomaly cleft palate. The secondary palate forms from paired palatal shelves which grow initially vertically before elevating to a horizontal position above the tongue and fusing together in the midline via the medial edge epithelia. As the epithelia of the vertical palatal shelves are in contact with the mandibular and lingual epithelia, pathological fusions between the palate and the mandible and/or the tongue must be prevented...
August 10, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28791059/risk-factors-for-pterygium-in-ilam-province-iran
#4
Parviz Malekifar, Hamed Esfandiari, Nazanin Behnaz, Fatemeh Javadi, Sima Azish, Mohammad Ali Javadi, Masumeh Kalantarion
PURPOSE: To evaluate the risk factors for pterygium in the dry, high altitude province of Ilam, Iran. METHODS: The study included patients who presented to ophthalmology clinic. The patients were divided into two groups: 210 diagnosed with pterygium or pinguecula (unilateral or bilateral), and 210 healthy controls. Demographic variables, living environment, disease type, disease laterality, family history of pterygium as well as history of smoking, working outdoors, baking, welding, ocular conditions (trachoma keratopathy, glaucoma, refractive error, and dry eye), use of glasses, ultraviolet light exposure, and systemic conditions were collected from both groups and compared for risk assessment...
July 2017: Journal of Ophthalmic & Vision Research
https://www.readbyqxmd.com/read/28779179/mtorc1-regulates-apoptosis-and-cell-proliferation-in-pterygium-via-targeting-autophagy-and-fgfr3
#5
Yanli Liu, Hanchun Xu, Meixia An
Pterygium is one of the most common ocular surface diseases. During the initiation of pterygium, resting epithelial cells are activated and exhibit aberrant apoptosis and cell proliferation. Mechanistic target of rapamycin complex 1 (mTORC1) is a central regulator of cell growth, cell proliferation, protein synthesis, autophagy and transcription. However, the effect of mTORC1 activation in epithelial cells on pterygium development has not yet been reported. Additionally, the roles of mTORC1 in aberrant apoptosis and cell proliferation during the initiation of pterygium, and the underlying mechanisms, are not known...
August 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28770884/outcome-of-application-of-amniotic-membrane-graft-in-ocular-surface-disorders
#6
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/28760128/analysis-of-musculoskeletal-dysmorphic-abnormalities-of-20-fetuses
#7
Mehmet Nuri Konya, Muhsin Elmas, Çiğdem Özdemir
OBJECTIVES: This study aims to report rates of skeletal abnormalities and their risk factors in light of information obtained in a fetal autopsy series. PATIENTS AND METHODS: The study included 20 fetuses (11 males, 8 females and 1 ambiguous genitalia; mean age 19.3±4.0 weeks; range 16 to 32 week) who underwent autopsy in our hospital between January 2013 and March 2015. Fetuses were systematically classified according to age, gender, family history, abortus week, abortus type, and extremity and organ abnormalities...
August 2017: Eklem Hastalıkları Ve Cerrahisi, Joint Diseases & related Surgery
https://www.readbyqxmd.com/read/28757691/cut-and-place-technique-of-pterygium-excision-with-autograft-without-using-sutures-or-glue-our-experience
#8
Jagdish Bhatia, Mathew Varghese, Bindu Narayanadas, Arti Bhatia
BACKGROUND: Conjunctival sutures used in pterygium surgery are not only time-consuming process but also may lead to local complications such as discomfort, scarring, granuloma, or infection. Plasma-derived products such as fibrin glue may produce possible hypersensitivity reactions whereas the risk of viral transmission remains theoretically possible. We describe a simple method of achieving conjunctival autograft adherence during pterygium surgery avoiding potential complications associated with the use of fibrin glue or sutures...
May 2017: Oman Journal of Ophthalmology
https://www.readbyqxmd.com/read/28736686/evaluating-changes-in-ocular-redness-using-a-novel-automated-method
#9
Francisco Amparo, Jia Yin, Antonio Di Zazzo, Tulio Abud, Ula V Jurkunas, Pedram Hamrah, Reza Dana
PURPOSE: To evaluate interobserver concordance in measured ocular redness among a group of raters using an objective computer-assisted method (ocular redness index [ORI]) and a group of clinicians using an ordinal comparative scale. METHODS: We conducted a prospective study to evaluate ocular redness in clinical photographs of 12 patients undergoing pterygium surgery. Photographs were acquired preoperatively, and at 1 week and 1 month postoperatively. One group of clinicians graded conjunctival redness in the photographs using an image-based comparative scale...
July 2017: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/28734814/conjunctival-autograft-versus-amniotic-membrane-transplantation-for-treatment-of-pterygium-findings-from-a-cochrane-systematic-review
#10
Elizabeth Clearfield, Barbara S Hawkins, Irene C Kuo
No abstract text is available yet for this article.
July 19, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28730117/bevacizumab-as-adjuvant-therapy-in-the-management-of-pterygium-a-systematic-review-and-meta-analysis
#11
Jian Liu, Jie-Hui Xu, Wen Xu, Guan-Lu Liang, Ji-Xian Lou, Yi Wang, Ji-Quan Wen, Yong-Bao Cao
AIM: To evaluate the clinical effect of bevacizumab in pterygium treatment. METHODS: A systematic review and quantitative Meta-analysis was performed. PubMed, EMBASE, Web of Science and Cochrane database were searched for eligible literatures published in English until June 2016. The endpoint was recurrence rate and pooled risk ratio (RR) was calculated. RESULTS: Nine eligible studies were included and Meta-analysis results showed no significantly difference in patients treated with bevacizumab in short term follow-up [3mo: RR=0...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28730091/aberrant-expression-of-genes-and-proteins-in-pterygium-and-their-implications-in-the-pathogenesis
#12
REVIEW
Qing-Yang Feng, Zi-Xuan Hu, Xi-Ling Song, Hong-Wei Pan
Pterygium is a common ocular surface disease induced by a variety of factors. The exact pathogenesis of pterygium remains unclear. Numbers of genes and proteins are discovered in pterygium and they function differently in the occurrence and development of this disease. We searched the Web of Science and PubMed throughout history for literatures about the subject. The keywords we used contain pterygium, gene, protein, angiogenesis, fibrosis, proliferation, inflammation, pathogenesis and therapy. In this review, we summarize the aberrant expression of a range of genes and proteins in pterygium compared with normal conjunctiva or cornea, including growth factors, matrix metalloproteinases and tissue inhibitors of metalloproteinases, interleukins, tumor suppressor genes, proliferation related proteins, apoptosis related proteins, cell adhesion molecules, extracellular matrix proteins, heat shock proteins and tight junction proteins...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28730070/inhibition-effect-of-curcumin-on-uvb-induced-secretion-of-pro-inflammatory-cytokines-from-corneal-limbus-epithelial-cells
#13
Shih-Chun Chao, Dan-Ning Hu, Joan Roberts, Xilun Shen, Chia-Yi Lee, Chan-Wei Nien, Hung-Yu Lin
AIM: To study the effects of curcumin on the secretion of interleukin (IL)-6 and IL-8 by corneal limbus epithelial cells. METHODS: Human corneal limbus epithelial cells were isolated and cultured from donor eyes and irradiated by UVB at different dosages with or without curcumin. MTT test was used for studying the effects of UVB and curcumin on the cell viability. The role of mitogen-activated protein kinase (MAPK) and nuclear factor-kappa B (NF-κB) pathways on the UVB-induced secretion of IL-6 and IL-8 were tested by addition of their inhibitors to the culture with or without UVB-radiation...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28715851/paradigm-shifts-peregrinations-and-pixies-in-ophthalmology
#14
REVIEW
A O Minas Coroneo
Defending vision, our highest bandwidth sense, challenges human ingenuity. Replacing or repairing highly specialized but scarce tissue within constraints of transparency, tissue shape and alignment, tissue borders and pressure maintenance, presents special challenges. Many, mostly destructive surgical procedures, were developed prior to an understanding of underlying pathophysiology. For a number of conditions, both reconstructive and destructive procedures co-exist yet there are few guidelines as to the better approach...
July 17, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/28704320/recurrence-rate-and-graft-stability-with-fibrin-glue-compared-with-suture-and-autologous-blood-coagulum-for-conjunctival-autograft-adherence-in-pterygium-surgery-a-meta-analysis
#15
Rituparna Maiti, Somnath Mukherjee, Debasish Hota
PURPOSE: To minimize recurrence and improve graft stability after pterygium surgery, conjunctival autograft adherence is done using fibrin glue (FG) or autologous blood coagulum (ABC). But there are studies that have reported conflicting or inconclusive results. This meta-analysis was conducted to evaluate the postoperative recurrence rate and graft stability after using FG, sutures, and ABC. METHODS: MEDLINE, Cochrane databases, and ICTRP were searched and PRISMA guidelines as well as recommended meta-analysis practices were followed...
July 11, 2017: Cornea
https://www.readbyqxmd.com/read/28695379/expression-of-prostaglandin-e2-receptor-subtypes-in-human-pterygium-and-normal-conjunctiva-immunohistochemical-study
#16
Erdem Dinç, Özer Dursun, Banu Yılmaz, Mustafa Vatansever, A Ayça Sarı, Özlem Yıldırım, Ufuk Adıgüzel
PURPOSE: In the present study, we aimed to evaluate the expression of EP receptors in primary and recurrent human pterygium tissues. METHODS: Pterygium samples were collected from 65 patients with primary pterygium and 16 patients with recurrent pterygium. Normal conjunctival tissues were collected from nasal interpalpebral area from 17 patients without systemic and any other ocular pathology. Expression of EP receptors was evaluated by immunohistochemistry. The median value for each receptor staining score (RSS) was determined in normal conjunctival specimens...
July 10, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28686975/overexpression-of-low-density-lipoprotein-receptors-stimulated-by-vascular-endothelial-growth-factor-in-fibroblasts-from-pterygium
#17
Mengliang Wu, Jiajian Wang, Qianwei Zhang, Yan Wang, Liangliang Niu, Tingting Shao
The activation of subconjunctival fibroblasts is believed to be responsible for the pathogenesis of pterygium. Vascular endothelial growth factor (VEGF) appears to be the most potent stimulator of formation and progression of pterygium. Pterygium excision is a common procedure, although the recurrence rates remain high. Various postoperative adjuvant therapies are now attempted to lower the recurrence rate, with severe side effects. To offer a greater therapeutic effect and lower side effects, it's necessary to discover a constant nanoparticle drug delivery targeting to subconjunctival fibroblasts in pterygium (PSFs)...
September 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28684141/anaesthetic-management-of-a-patient-with-multiple-pterygium-syndrome-for-elective-caesarean-section
#18
V Daga, C Mendonca, F Choksey, J Elton, S Radhakrishna
We report a case of a pregnant woman with multiple pterygium syndrome who presented for elective caesarean section. Neuraxial anaesthesia failed and the backup plan of awake intubation was extremely difficult.
April 12, 2017: International Journal of Obstetric Anesthesia
https://www.readbyqxmd.com/read/28674858/self-made-cryopreservative-fibrin-glue-applied-in-pterygium-surgery-a-novel-practical-technique
#19
Jing-Wen Gong, Jun-Hao Chen, Ting Shen, Jin Jiang
PURPOSE: To introduce a novel practical technique of self-made cryopreservative fibrin glue (SMC) applied in pterygium surgery and to assess its safety and efficacy. METHODS: Forty-eight eyes of 48 patients with nasal primary pterygium were enrolled. The patients were equally assigned to 6 groups. Self-made fibrin glue was subpackaged and, respectively, cryopreserved for 3, 7, 15 days and 1, 2 and 3 months. At each time point, the asepsis of SMC was confirmed by bacterial culture and colony counting...
July 3, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/28664906/identification-of-pterygium-related-mrna-expression-profiling-by-microarray-analysis
#20
J Liu, X Ding, L Yuan, X Zhang
PurposePterygium is a common degenerative and proliferative disease of the ocular surface. In some severe cases, pterygium may lead to irregular corneal astigmatism and corneal stromal scarring with visual impairment. The proliferative capacities of pterygial cells make them appear similar to tumorigenesis. Although considerable progress has been made towards understanding the etiology of the disease, the pathogenesis of pterygium has not been completely understood. In our previous study, we constructed pterygium-related lncRNA libraries by using microarray to investigate the potential roles of lncRNAs in pterygium...
June 30, 2017: Eye
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