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Limbal stem cell deficiency

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https://www.readbyqxmd.com/read/28538612/scleral-contact-lenses-in-an-academic-oculoplastics-clinic-epidemiology-and-emerging-considerations
#1
Harinder S Chahal, Marcela Estrada, Christine W Sindt, Jacob A Boehme, Mark A Greiner, Jeffrey A Nerad, Keith D Carter, Richard C Allen, Erin M Shriver
PURPOSE: To describe the role and efficacy of scleral contact lenses (SCLs) in the treatment of progressive keratopathy in patients who have undergone periocular surgical procedures, to investigate the financial impact of these surgical interventions, and to demonstrate the role of oculoplastic surgery in improving scleral contact lens fit. METHODS: A retrospective medical record review was performed to identify patients who both received SCLs and were examined by the oculoplastics service at the University of Iowa between January 1990 and December 2015...
May 22, 2017: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28528957/proteasomes-in-corneal-epithelial-cells-and-cultured-autologous-oral-mucosal-epithelial-cell-sheet-caomecs-graft-used-for-the-ocular-surface-regeneration
#2
Fawzia Bardag-Gorce, Richard Hoft, Imara Meepe, Julio Garcia, Kumar Tiger, Andrew Wood, Amanda Laporte, Derek Pan, Andrew Makalinao, Robert Niihara, Joan Oliva, Arjie Florentino, Amber M Gorce, Jeremy Stark, Daileen Cortez, Samuel W French, Yutaka Niihara
PURPOSE: This study focuses on characterizing proteasomes in corneal epithelial cells (CEC) and in cultured autologous oral mucosal epithelial cell sheets (CAOMECS) used to regenerate the ocular surface. METHODS: Limbal stem cell deficiency (LSCD) was surgically induced in rabbit corneas. CAOMECS was engineered and grafted onto corneas with LSCD to regenerate the ocular surface. RESULTS: LSCD caused an increase in inflammatory cells in the ocular surface, an increase in the formation of immunoproteasomes (IPR), and a decrease in the formation of constitutive proteasome (CPR)...
May 18, 2017: Ocular Surface
https://www.readbyqxmd.com/read/28510772/prevalence-incidence-and-risk-factors-for-the-development-of-glaucoma-in-patients-with-aniridia
#3
Shantha Balekudaru, Nandhini Sankaranarayanan, Sumita Agarkar
PURPOSE: To assess the prevalence, incidence, and risk factors for the development of glaucoma in patients with aniridia. METHODS: Retrospective analysis of case records of patients diagnosed as having congenital aniridia between January 1986 and December 2011 was performed. Patients with a follow-up of more than 12 months were included. RESULTS: Ninety-one patients (180 eyes) with the diagnosis of aniridia were identified from the case records...
May 15, 2017: Journal of Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28484851/-long-term-outcome-of-keratoprosthesis-with-biological-support
#4
K Hille
BACKGROUND: In severe Sicca syndrome and limbal stem cell deficiency, vision can be restored by an artificial optical implant into the cornea (keratoprosthesis, KPro). After multiple efforts to achieve long-lasting corneal fixation of such an optical implant, two methods have become established: KPro with biological support, such as osteo-odonto-keratoprosthesis (OOKP) made from the root of patient's own tooth or osteo-keratoprosthesis (OKP), made from cortical bone of the patient's tibia; and the Boston KPro...
May 8, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28465692/safety-of-cultivated-limbal-epithelial-stem-cell-transplantation-for-human-corneal-regeneration
#5
REVIEW
J Behaegel, S Ní Dhubhghaill, C Koppen, N Zakaria
Ex vivo cultivated limbal stem cell transplantation is a promising technique for the treatment of limbal stem cell deficiency. While the results of the clinical trials have been extensively reported since the introduction of the technique in 1997, little has been reported regarding the potential health risks associated with production processes and transplantation techniques. Culture procedures require the use of animal and/or human-derived products, which carry the potential of introducing toxic or infectious agents through contamination with known or unknown additives...
2017: Stem Cells International
https://www.readbyqxmd.com/read/28440250/outcomes-of-deep-anterior-lamellar-keratoplasty-following-autologous-simple-limbal-epithelial-transplant-in-pediatric-unilateral-severe-chemical-injury
#6
Divya Singh, M Vanathi, Chanchal Gupta, Noopur Gupta, Radhika Tandon
AIMS: To evaluate outcomes of deep anterior lamellar keratoplasty (DALK) in pediatric eyes with unilateral severe chemical injury which have undergone autologous simple limbal epithelial transplant (SLET). SETTINGS AND DESIGN: The study design was a retrospective case series. MATERIALS AND METHODS: This retrospective, case series of all children <16 years of age that have undergone DALK following autologous SLET procedure in unilateral severe chemical injury evaluates the outcomes and complications in the setting of a tertiary care center in North India...
March 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28426442/amniotic-membrane-use-for-management-of-corneal-limbal-stem-cell-deficiency
#7
Alfonso L Sabater, Victor L Perez
PURPOSE OF REVIEW: The current article reviews the most recent surgical techniques for management of corneal limbal stem cell deficiency (LSCD) using amniotic membrane tissue. RECENT FINDINGS: Early successes with amniotic membrane transplantation (AMT) for the treatment of ocular surface disorders have encouraged clinicians to investigate new applications. The use of AMT as a temporary patch in emergency cases in which LSCD may develop has considerably improved the prognosis of these patients...
April 19, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28426441/diagnosis-of-corneal-limbal-stem-cell-deficiency
#8
Kyeong Hwan Kim, Shahzad I Mian
PURPOSE OF REVIEW: A state of limbal stem cell deficiency (LSCD) can be secondary to a number of etiologies, resulting in either a reduction in the total number of limbal stem cells or an abnormality in stem cell function. Initially, the epithelium becomes irregular and hazy; however, this condition may progress to persistent corneal epithelial defects, stromal scarring, ulceration, and even perforation. Since LSCD secondary to a variety of etiologies may be reversible, and various factors are prognostic of disease progression, timely diagnosis is important...
April 19, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28406800/simple-limbal-epithelial-transplantation
#9
Virender S Sangwan, John A H Sharp
PURPOSE OF REVIEW: Simple limbal epithelial transplant (SLET) is a technique for addressing limbal stem cell deficiency. Limbal tissue from a donor eye, typically the patient's fellow healthy eye, is transplanted onto an amniotic membrane attached to the surface of the diseased eye. SLET was developed to address limitations of other techniques. Specifically, the technical difficulty of ex-vivo expansion of cells required in some techniques and the larger amount of valuable limbal tissue harvested in techniques not relying on ex-vivo expansion...
April 12, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28399069/conjunctival-limbal-autograft
#10
Sheraz M Daya
PURPOSE OF REVIEW: To provide an overview of conjunctival-limbal autografting (CLAU) for ocular surface rehabilitation with emphasis on more recent literature detailing outcomes of the procedure over the last 2 decades as well as technique variations and adjuvant techniques. RECENT FINDINGS: Limbal autografting initially described in 1964 by Barraquer and Strampelli and later popularized by Kenyon and Tseng is considered the best option for restoration of corneal phenotype in unilateral limbal stem-cell deficiency...
April 8, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28399066/limbal-and-corneal-epithelial-homeostasis
#11
Ghasem Yazdanpanah, Sayena Jabbehdari, Ali R Djalilian
PURPOSE OF REVIEW: The aim of this review is to describe the underlying mechanisms of corneal epithelial homeostasis in addition to illustrating the vital role of the limbal epithelial stem cells (LESCs) and the limbal niche in epithelial regeneration and wound healing. RECENT FINDINGS: The shedded corneal epithelial cells are constantly replenished by the LESCs which give rise to epithelial cells that proliferate, differentiate, and migrate centripetally. While some recent studies have proposed that epithelial stem cells may also be present in the central cornea, the predominant location for the stem cells is the limbus...
April 8, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28386069/tissue-harvesting-site-and-culture-medium-affect-attachment-growth-and-phenotype-of-ex-vivo-expanded-oral-mucosal-epithelial-cells
#12
Rakibul Islam, Jon Roger Eidet, Reza A Badian, Marit Lippestad, Edward Messelt, May Griffith, Darlene A Dartt, Tor Paaske Utheim
Transplantation of cultured oral mucosal epithelial cells (OMECs) is a promising treatment strategy for limbal stem cell deficiency. In order to improve the culture method, we investigated the effects of four culture media and tissue harvesting sites on explant attachment, growth, and phenotype of OMECs cultured from Sprague-Dawley rats. Neither choice of media or harvesting site impacted the ability of the explants to attach to the culture well. Dulbecco's modified Eagle's medium/Ham's F12 (DMEM) and Roswell Park Memorial Institute 1640 medium (RPMI) supported the largest cellular outgrowth...
April 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28379858/keratolimbal-allograft
#13
Albert Y Cheung, Edward J Holland
PURPOSE OF REVIEW: Keratolimbal allograft (KLAL) transplants limbal tissue attached to a corneoscleral carrier from a cadaveric donor to deliver a large number of stem cells to the recipient. The present article will provide a review of KLAL focusing on the recent literature. RECENT FINDINGS: Recent findings pertain to tissue selection, immunosuppression and adverse event profiles, and postoperative complications (particularly related to immunologic rejection). SUMMARY: KLAL permits the treatment of limbal stem cell deficiency eyes when there is no available living-related or autograft tissue with minimal risk of irreversible toxicity from modern systemic immunosuppression...
April 4, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28376025/simultaneous-keratolimbal-autograft-and-penetrating-autokeratoplasty-a-single-stage-procedure-to-restore-monocular-vision-of-a-blind-patient-with-limbal-stem-cell-deficiency
#14
Elias Jarade, Mazen Amro, Ali A Haydar, Adib Hemade
PURPOSE: To describe the technique of simultaneous keratolimbal autograft and penetrating autokeratoplasty to restore monocular vision of a blind patient with limbal stem cell deficiency (LSCD). METHODS: A patient with acquired monocular vision due to loss of the left eye owing to LSCD postblast injury presented with acute loss of vision in the right eye due to central retinal artery occlusion. Simultaneous keratolimbal autograft and penetrating autokeratoplasty were performed in attempt to restore his vision in the left eye...
June 2017: Cornea
https://www.readbyqxmd.com/read/28366677/change-in-vault-during-scleral-lens-trials-assessed-with-anterior-segment-optical-coherence-tomography
#15
Varsha M Rathi, Preeji S Mandathara, Srikanth Dumpati, Virender S Sangwan
PURPOSE: To assess the change in vault during scleral lens fitting with anterior segment optical coherence tomography (AS-OCT). METHODS: This study comprised of patients who had AS-OCT performed after 1h and 4h of scleral lens wear (PROSE, prosthetic replacement of the ocular surface ecosystem, Boston Foundation for Sight, Needham Heights, MA, USA). Vault was measured on AS-OCT as the distance between the front surface of the cornea in the center and the back surface of the scleral lens...
March 30, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28347855/role-of-high-resolution-optical-coherence-tomography-in-diagnosing-ocular-surface-squamous-neoplasia-with-coexisting-ocular-surface-diseases
#16
Marwan Atallah, Madhura Joag, Anat Galor, Guillermo Amescua, Afshan Nanji, Jianhua Wang, Victor L Perez, Sander Dubovy, Carol L Karp
PURPOSE: Coexistence of an ocular surface disease can mask the typical features of ocular surface squamous neoplasia (OSSN). The purpose of this study was to evaluate high resolution optical coherence tomography (HR-OCT) as an adjunct in the detection and differentiation of OSSN within coexisting ocular surface pathologies. METHODS: Retrospective study of 16 patients with ocular surface disease and lesions suspicious for OSSN that were evaluated with HR-OCT. HR-OCT images of the lesions were taken to look for evidence of OSSN...
March 24, 2017: Ocular Surface
https://www.readbyqxmd.com/read/28339301/cultivation-of-human-oral-mucosal-explants-on-contact-lenses
#17
Barbara Zsebik, László Ujlaky-Nagy, Gergely Losonczy, György Vereb, Lili Takács
Purpose/Aim: Autologous cultivated oral mucosal (OM) epithelial transplantation has been successfully used as corneal epithelial replacement in bilateral limbal stem cell deficiency. Recently, lotrafilcon A contact lens (CL) surface was described as a suitable carrier for cultured stem cells in corneal epithelial transplantation. Our aim was to establish explant cultures from human OM on CL carriers that are free of animal-derived materials and feeder cells. MATERIALS AND METHODS: Human cadaveric 2 mm OM explants were sutured onto CL surfaces and cultivated with fetal calf serum (FCS) or human serum (HS) supplemented culture medium without feeder cells...
March 24, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28336223/paediatric-idiopathic-limbal-stem-cell-deficiency
#18
Stephen J Vincent, Graham A Lee
Acquired limbal stem cell deficiency (LSCD) describes a condition in which the corneal limbal stem cells are altered or destroyed, typically due to ocular trauma, chronic allergy or inflammation. Idiopathic LSCD is a term used to describe limbal stem cell failure in the absence of any identifiable causative factor. While several cases of adult-onset LSCD have been identified previously, this case report describes a rare presentation of bilateral asymmetric idiopathic paediatric limbal stem cell deficiency in a sixteen-year-old male with an otherwise unremarkable ocular history...
March 20, 2017: Contact Lens & Anterior Eye: the Journal of the British Contact Lens Association
https://www.readbyqxmd.com/read/28300738/preliminary-results-from-the-comparison-of-simple-limbal-epithelial-transplantation-with-conjunctival-limbal-autologous-transplantation-in-severe-unilateral-chronic-ocular-burns
#19
Ritu Arora, Pallavi Dokania, Aditi Manudhane, Jawahar Lal Goyal
PURPOSE: To compare the safety, efficacy, and clinical outcomes of simple limbal epithelial transplantation (SLET) with conjunctival-limbal autologous transplantation (CLAU) in severe unilateral ocular chemical burns. MATERIALS AND METHODS: Twenty patients of unilateral chronic ocular burns with more than 270° limbal stem cell deficiency and a healthy fellow eye were divided into two groups - ten patients of Group A underwent SLET while ten patients of Group B were operated for CLAU...
January 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28297580/a-human-corneal-epithelial-cell-line-model-for-limbal-stem-cell-biology-and-limbal-immunobiology
#20
Bakiah Shaharuddin, Sajjad Ahmad, Nani Md Latar, Simi Ali, Annette Meeson
Limbal stem cell (LSC) deficiency is a visually debilitating condition caused by abnormal maintenance of LSCs. It is treated by transplantation of donor-derived limbal epithelial cells (LECs), the success of which depends on the presence and quality of LSCs within the transplant. Understanding the immunobiological responses of these cells within the transplants could improve cell engraftment and survival. However, human corneal rings used as a source of LSCs are not always readily available for research purposes...
March 2017: Stem Cells Translational Medicine
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