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Limbal deficiency

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https://www.readbyqxmd.com/read/29700361/human-limbal-niche-cells-are-a-powerful-regenerative-source-for-the-prevention-of-limbal-stem-cell-deficiency-in-a-rabbit-model
#1
Guigang Li, Yuan Zhang, Subo Cai, Ming Sun, Juan Wang, Shen Li, Xinyu Li, Sean Tighe, Shuangling Chen, Huatao Xie, Yingting Zhu
In this article, human limbal niche cells (LNC) or bone marrow derived mesenchymal stem cells (BMMSC) were used to prevent limbal stem cell deficiency (LSCD) in an alkali burn rabbit model and their results were compared. The epithelial cell defect area, corneal neovascularization, and the print cell cytometry were quantified to grade the severity of LSCD. Three months after the alkali burn, a partial LSCD was observed in the control group (no treatment) indicated by chronic corneal epithelial defects, positive corneal fluorescein staining, neovascularization and goblet cell migration...
April 26, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29679460/limbal-niche-cells-are-a-potent-resource-of-adult-mesenchymal-progenitors
#2
REVIEW
Ping Guo, Hong Sun, Yuan Zhang, Sean Tighe, Shuangling Chen, Chen-Wei Su, Yongsong Liu, Hongxia Zhao, Min Hu, Yingting Zhu
Limbal niche cells located in the limbal Palisades of Vogt are mesenchymal stem cells that reside next to limbal basal epithelial cells. Limbal niche cells are progenitors that express embryonic stem cell markers such as Nanog, Nestin, Oct4, Rex1, Sox2 and SSEA4, mesenchymal cell markers such as CD73, CD90 and CD105, and angiogenesis markers such as Flk-1, CD31, CD34, VWF, PDGFRβ and α-SMA, but negative for CD45. In addition, the stemness of limbal niche cells can be maintained during their cell culture in a three-dimension environment...
April 20, 2018: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/29649838/-limbokeratoplasty-to-treat-lattice-and-granular-corneal-dystrophies
#3
Thabo Lapp, Philip Maier, Daniel Böhringer, Thomas Reinhard
The surgical technique of limbokeratoplasty (limbo-KP) was initially established for the treatment of severe limbal deficiencies. Besides improving visual acuity, surgery is aimed at ensuring complete, long-lasting epithelialization of the ocular surface. Due to the extension of the indication spectrum, limbo-KPs are also used in various forms of epithelial/stromal corneal dystrophies such as lattice and granular (transforming growth factor beta-induced [TGFBI] gene mutation associated) dystrophies. The objective of limbo-KP is to ensure prolonged clear graft survival without a recurrence of the dystrophy as otherwise observed after conventional keratoplasty...
April 12, 2018: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/29648915/response-to-modabber-and-harissi-dagher-s-letter-type-1-boston-keratoprosthesis-for-limbal-stem-cell-deficiency-in-epidermolysis-bullosa
#4
N Geetha Sravani, Ashik Mohamed, Virender S Sangwan
No abstract text is available yet for this article.
April 12, 2018: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/29625489/visualizing-the-fate-of-transplanted-k14-confetti-corneal-epithelia-in-a-mouse-model-of-limbal-stem-cell-deficiency
#5
Alexander Richardson, Mijeong Park, Stephanie L Watson, Denis Wakefield, Nick Di Girolamo
Purpose: Therapies for limbal stem cell deficiency (LSCD) include stem cell (SC) grafts that regenerate the damaged ocular surface. However, the fate of transplanted cells is ill-defined. We addressed this limitation using primary corneal epithelial cells from K14-Confetti mice. Methods: Cultures of primary corneo-limbal epithelia were generated from K14-Confetti (n = 6) and wild-type (WT) (n = 3) mice. Cell phenotype and function was ascertained by immunofluorescence, flow cytometry, quantitative PCR and colony formation...
March 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29621511/spectral-domain-optical-coherence-tomography-in-limbal-stem-cell-deficiency-a-case-control-study
#6
Nilly Banayan, Cristina Georgeon, Kate Grieve, Vincent M Borderie
PURPOSE: To evaluate the efficacy of optical coherence tomography as a non-contact method for imaging the ocular surface in limbal stem cell deficiency (LSCD) and normal eyes. DESIGN: Retrospective case-control study. METHODS: SETTING: Institutional. STUDY POPULATION: 22 eyes with LSCD (study group, 22 patients) and 10 normal eyes (control group, 10 patients). OBSERVATION PROCEDURES: SD-OCT and confocal microscopy in both the limbal and central corneal zones...
April 2, 2018: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29613762/synthetic-nanofiber-reinforced-amniotic-membrane-via-interfacial-bonding
#7
Huanhuan Liu, Zhengbing Zhou, Hui Lin, Juan Wu, Brian Ginn, Ji Suk Choi, Xuesong Jiang, Liam Chung, Jennifer H Elisseeff, Samuel Yiu, Hai-Quan Mao
Severe damage to the ocular surface can result in limbal stem cell (LSC) deficiency, which contributes to loss of corneal clarity, potential vision loss, chronic pain, photophobia, and keratoplasty failure. Human amniotic membrane (AM) is the most effective substrate for LSC transplantation to treat patients with LSC deficiency. However, the widespread use of the AM in the clinic remains a challenge because of the high cost for preserving freshly prepared AM and the weak mechanical strength of lyophilized AM...
April 19, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29597010/boston-keratoprosthesis-type-1-for-limbal-stem-cell-deficiency-after-severe-chemical-corneal-injury-a-systematic-review
#8
REVIEW
Swapna S Shanbhag, Hajirah N Saeed, Eleftherios I Paschalis, James Chodosh
PURPOSE: To systematically review the published literature on outcomes of Boston keratoprosthesis type 1 for the treatment of limbal stem cell deficiency secondary to severe chemical corneal injury. METHODS: Literature searches were conducted in MEDLINE (Ovid), Embase, Web of Science, and the Cochrane Central Register. The main outcome measures assessed were the proportion of eyes with best-corrected visual acuity (BCVA) ≥ 20/200 and the proportion retaining their original keratoprosthesis, both at the last recorded visit...
March 26, 2018: Ocular Surface
https://www.readbyqxmd.com/read/29576892/amniotic-membrane-transplantation-in-surgical-treatment-of-conjunctival-melanoma-long-term-results
#9
Melis Palamar, Banu Yaman, Taner Akalın, Ayse Yağcı
Objectives: To investigate the long-term efficacy and results of surgical management of conjunctival melanoma reconstructed with amniotic membrane transplantation. Materials and Methods: Conjunctival melanoma in 10 patients (5 female, 5 male) was totally excised with adjunctive cryotherapy to the surgical margins, corneal epitheliectomy with absolute alcohol in cases of corneal involvement, lamellar sclerectomy in cases with episcleral involvement, and ocular surface grafting with cryopreserved amniotic membrane...
February 2018: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/29573222/concise-review-altered-versus-unaltered-amniotic-membrane-as-a-substrate-for-limbal-epithelial-cells
#10
REVIEW
Tor Paaske Utheim, Øygunn Aass Utheim, Panagiotis Salvanos, Catherine J Jackson, Stefan Schrader, Gerd Geerling, Amer Sehic
Limbal stem cell deficiency (LSCD) can result from a variety of corneal disorders, including chemical and thermal burns, infections, and autoimmune diseases. The symptoms of LSCD may include irritation, epiphora, blepharospasms, photophobia, pain, and decreased vision. There are a number of treatment options, ranging from nonsurgical treatments for mild LSCD to various forms of surgery that involve different cell types cultured on various substrates. Ex vivo expansion of limbal epithelial cells (LEC) involves the culture of LEC harvested either from the patient, a living relative, or a cadaver on a substrate in the laboratory...
March 23, 2018: Stem Cells Translational Medicine
https://www.readbyqxmd.com/read/29572164/surgical-management-of-severe-ocular-surface-injury-due-to-roman-candle-explosion-accidents
#11
Albert Y Cheung, Brad M Genereux, Brittney Dautremont, Amit Govil, Edward J Holland
PURPOSE: To report the clinical features, management, and outcomes of patients with ocular surface damage secondary to Roman candle explosion accidents. METHODS: Retrospective, noncomparative, interventional case series of 11 patients with Roman candle explosion-related ocular surface injuries referred to the Cincinnati Eye Institute between 2007 and 2016. RESULTS: Eleven patients (10 male, 1 female, mean age 22.4 years) sustained unilateral ocular surface injuries with presenting visual acuity ranging from count fingers to light perception...
March 20, 2018: Ocular Surface
https://www.readbyqxmd.com/read/29552666/improvement-of-chronic-corneal-opacity-in-ocular-surface-disease-with-prosthetic-replacement-of-the-ocular-surface-ecosystem-prose-treatment
#12
Anna Cressey, Deborah S Jacobs, Crystal Remington, Karen G Carrasquillo
Purpose: To demonstrate clearing of chronic corneal opacities and improvement of visual acuity with the use of BostonSight prosthetic replacement of the ocular surface ecosystem (PROSE) treatment in ocular surface disease. Observations: We undertook retrospective analysis of the medical records of a series of patients who underwent PROSE treatment from August 2006 to December 2014. Patients were referred for ocular surface disease of various etiologies. Primary inclusion criterion was corneal opacity that improved with PROSE treatment...
June 2018: American Journal of Ophthalmology Case Reports
https://www.readbyqxmd.com/read/29543561/letter-to-the-editor-type-1-boston-keratoprosthesis-for-limbal-stem-cell-deficiency-in-epidermolysis-bullosa
#13
Milad Modabber, Mona Harissi-Dagher
No abstract text is available yet for this article.
March 15, 2018: Ocular Immunology and Inflammation
https://www.readbyqxmd.com/read/29516041/stem-cells-treatment-in-the-ocular-surface-regeneration
#14
REVIEW
Cristina Nicula, Izabela Szabo, Ozana Ivan
The article presents the modern treatment with stem cells in the reconstruction of ocular surface. The turnover of the stem cells, the location in the limbus areas, the importance of limbal stem cells presence, the clinical appearance of stem cell deficiency, investigations method for this illness and the management of stem cell deficiency (artificial lacrimal tear drops, mini scleral contact lenses and the surgical treatment with allografts and autografts of stem cells) were taken into account.
October 2017: Romanian Journal of Ophthalmology
https://www.readbyqxmd.com/read/29473525/oral-mucosal-stem-cells-human-immature-dental-pulp-stem-cells-and-hair-follicle-bulge-stem-cells-as-adult-stem-cells-able-to-correct-limbal-stem-cell-deficiency
#15
Nada Tarek Hassan, Neveen Ahmed AbdelAziz
Adult stem cells are somatic stem cells distributed all over the body. They represent a promising future for regenera-tive medicine because of their multiple advantages as they are widely available, accessible, easily stored and manipulated to a wide range of cells and with minimal invasive extraction. This review describes three examples of adult stem cells: oral mucosal epithelial stem cells, human immature dental pulp stem cells and hair follicle bulge stem cells that show an ability to correct limbal stem cell deficiency, their isolation and cultivation methods, feeder layers, carriers, markers expressed, successfulness to regenerate the ocular surface and mimic the corneal function in LSCD...
February 23, 2018: Current Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29471701/repairing-the-corneal-epithelium-using-limbal-stem-cells-or-alternative-cell-based-therapies
#16
Yuzuru Sasamoto, Bruce R Ksander, Markus H Frank, Natasha Y Frank
The corneal epithelium is maintained by limbal stem cells (LSCs) that reside in the basal epithelial layer of the tissue surrounding the cornea termed the limbus. Loss of LSCs results in limbal stem cell deficiency (LSCD) that can cause severe visual impairment. Patients with partial LSCD may respond to conservative therapies designed to rehabilitate the remaining LSCs. However, if these conservative approaches fail or, if complete loss of LSCs occurs, transplantation of LSCs or their alternatives is the only option...
March 6, 2018: Expert Opinion on Biological Therapy
https://www.readbyqxmd.com/read/29453224/simple-limbal-epithelial-transplantation-slet-in-failed-cultivated-limbal-epithelial-transplantation-clet-for-unilateral-chronic-ocular-burns
#17
Sayan Basu, Sashwanthi Mohan, Swapnil Bhalekar, Vivek Singh, Virender Sangwan
AIMS: Cultivated limbal epithelial transplantation (CLET) fails in around 20%-30% of cases. This study aimed to report the clinical outcomes of autologous simple limbal epithelial transplantation (SLET) in eyes with recurrent unilateral limbal stem cell deficiency (LSCD) due to failure of CLET. METHODS: This was a prospective case series which included 30 eyes of 30 patients who underwent SLET between 2010 and 2016 after failure of one (n=24) or two (n=6) previous CLET procedures for chronic unilateral ocular burns...
February 16, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29436059/outcomes-of-penetrating-keratoplasty-following-autologous-cultivated-limbal-epithelial-stem-cell-transplantation
#18
Gustavo S Figueiredo, Borja Salvador-Culla, Oliver J Baylis, Hardeep S Mudhar, Majlinda Lako, Francisco C Figueiredo
The purpose of this study is to investigate the outcomes of penetrating keratoplasty (PKP) following autologous cultivated limbal epithelial stem cell transplantation (CLET). A prospective, single center, interventional cohort study investigating patients with unilateral total limbal stem cell deficiency (LSCD) treated with CLET who underwent PKP. Patients with confirmed corneal re-epithelialization > 6 months post-CLET, and with best-corrected visual acuity (BCVA) <0.3 logMAR were offered PKP. CLET survival assessed by slit lamp, corneal impression cytology (CIC), and in vivo confocal microscopy...
February 13, 2018: Stem Cells
https://www.readbyqxmd.com/read/29434727/differentiation-of-rat-adipose-derived-mesenchymal-stem-cells-into-corneal-like-epithelial-cells-driven-by-pax6
#19
Jing Sun, Wei-Hua Liu, Feng-Mei Deng, Yong-Hui Luo, Ke Wen, Hong Zhang, Hai-Rong Liu, Jiang Wu, Bing-Yin Su, Yi-Lun Liu
Corneal integrity, transparency and vision acuity are maintained by corneal epithelial cells (CECs), which are continuously renewed by corneal limbal stem cells (LSCs). Deficiency of CECs and/or LSCs is associated with numerous ocular diseases. Paired box (PAX)6 is an eye development-associated transcription factor that is necessary for cell fate determination and differentiation of LSCs and CECs. In the present study, the PAX6 gene was introduced into adipose-derived rat mesenchymal stem cells (ADMSCs) to investigate whether PAX6-transfected cells were able to transdifferentiate into corneal-like epithelial cells and to further verify whether the cells were suitable as a cell source for corneal transplantation...
February 2018: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29426444/eyeprintpro-therapeutic-scleral-contact-lens-indications-and-outcomes
#20
Michael T B Nguyen, Vishakha Thakrar, Clara C Chan
OBJECTIVE: To describe indications and outcomes of patients fitted with the EyePrintPRO therapeutic scleral lens. METHODS: A database search of patients fitted with the EyePrintPRO from 2014 to 2016. Fourteen eyes of 10 patients were reviewed retrospectively. Patient demographics, medical and ocular history, indications for fitting, duration of wear, symptoms, and best-corrected visual acuity (BCVA) were analyzed. RESULTS: Mean age at lens fitting was 49 years (range, 21-67 years)...
February 2018: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
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