Limbal Stem Cell Deficiency and Ocular Phenotype in Ectrodactyly-Ectodermal Dysplasia-Clefting Syndrome Caused by p63 Mutations

Autor: Giuseppe Castaldo, Vanessa Barbaro, John A. McGrath, Diego Ponzin, Elisabetta Böhm, Paola Nardiello, Enzo Di Iorio, Stephen B. Kaye, Colin E. Willoughby, Stefano Ferrari
Přispěvatelé: Di Iorio, E, Kaye, Sb, Ponzin, D, Barbaro, V, Ferrari, S, Böhm, E, Nardiello, P, Castaldo, Giuseppe, Mcgrath, Ja, Willoughby, Ce
Rok vydání: 2012
Předmět:
Male
Pathology
Ectodermal dysplasia
Ectrodactyly
genetic structures
DNA Mutational Analysis
Visual Acuity
Meibomian gland
Polymerase Chain Reaction
Corneal Diseases
Ectodermal Dysplasia
Missense mutation
Limbal stem cell
Child
Fluorescent Antibody Technique
Indirect

Stem Cells
Epithelium
Corneal

Middle Aged
Cleft Palate
limbal stem cell deficiency LSCD
Phenotype
medicine.anatomical_structure
Child
Preschool

Immunohistochemistry
Adult
medicine.medical_specialty
Adolescent
Cleft Lip
Mutation
Missense

Vision Disorders
p63 sequence variants
Limbus Corneae
Ophthalmology
medicine
Humans
Retrospective Studies
ectrodactyly ectodermal dysplasia clefting EEC syndrome
business.industry
Tumor Suppressor Proteins
Epithelial Cells
Retrospective cohort study
medicine.disease
eye diseases
stomatognathic diseases
Histopathology
sense organs
business
Keratoplasty
Penetrating

Transcription Factors
Zdroj: Ophthalmology. 119:74-83
ISSN: 0161-6420
DOI: 10.1016/j.ophtha.2011.06.044
Popis: Objective To describe the ocular phenotype in patients with ectrodactyly-ectodermal dysplasia-clefting (EEC) syndrome (MIM#604292) and to determine the pathogenic basis of visual morbidity. Design Retrospective case series. Participants Nineteen families (23 patients) affected by EEC syndrome from the United Kingdom, Ireland, and Italy. Methods General medical examination to fulfill the diagnostic criteria for EEC syndrome and determine the phenotypic severity. Mutational analysis of p63 was performed by polymerase chain reaction–based bidirectional Sanger sequencing. All patients with EEC syndrome underwent a complete ophthalmic examination and ocular surface assessment. Limbal stem cell deficiency (LSCD) was diagnosed clinically on the basis of corneal conjunctivalization and anatomy of the limbal palisades of Vogt. Impression cytology using immunofluorescent antibodies was performed in 1 individual. Histologic and immunohistochemical analyses were performed on a corneal button and corneal pannus from 2 EEC patients. Main Outcome Measures The EEC syndrome phenotypic severity (EEC score), best-corrected Snellen visual acuity (decimal fraction), slit-lamp biomicroscopy, tear function index, tear breakup time, LSCD, p63 DNA sequence variants, impression cytology, and corneal histopathology. Results Eleven heterozygous missense mutations in the DNA binding domain of p63 were identified in all patients with EEC syndrome. All patients had ocular involvement and the commonest was an anomaly of the meibomian glands and lacrimal drainage system defects. The major cause of visual morbidity was progressive LSCD, which was detected in 61% (14/23). Limbal stem cell deficiency was related to advancing age and caused a progressive keratopathy, resulting in a dense vascularized corneal pannus, and eventually leading to visual impairment. Histologic analysis and impression cytology confirmed LSCD. Conclusions Heterozygous p63 mutations cause the EEC syndrome and result in visual impairment owing to progressive LSCD. There was no relationship of limbal stem cell failure with the severity of EEC syndrome, as classified by the EEC score, or the underlying molecular defect in p63 . Financial Disclosure(s) The authors have no proprietary or commercial interest in any of the materials discussed in this article.
Databáze: OpenAIRE