ABSTRACT
Objective To screen the disease-causing genes in an autosomal dominant (AD)Weill-Marchesani syndrome (WMS) family from Henan province in China,and to analyze the relationship between genotypes and phenotypes of the AD WMS.Methods A family with suspected WMS was collected and studied in Henan Eye Hospital from September 2016 to July 2017.Clinical data and genomic DNA of the families were analyzed and genetic variations were screened by whole-exome sequencing (WES) The candidate genes related to ectopia lentis (FBN1,ADAMTSL2,ADAMTSL4,TGFBR2,CBS,ADAMTS10,ADAMTS17) were analyzed,and multiplex ligation dependent probe amplification (MLPA) was applied.Novel variants were further evaluated by sequencing 96 normal individuals.The previous reports with similar genetic characteristics were reviewed and the mutation types and clinical features were summarized.Written informed consent was obtained from the participants or their guardians before the collection of their venous blood and clinical data.Ethical approval was obtained from the Institutional Review Board of Henan Eye Institute.Results The suspicious mutation of the c.5260G＞A was detected in exon 42 of the FBN1 by WES in this family,which was predicted to be pathogenic and cosegregated with the disease;the clinical futures of the patients in the family included proportionate short stature,brachydactyly,joint stiffness,and the ocular problems included microspherophakia,moderate myopia,secondary glaucoma.Four mutations of FBN1 that related to WMS were reported in previous literature,and three of them were located in 41-42 exons and the others were the deletion of exons 9-11.All patients had typical clinical features of microspherophakia,short stature,brachydactyly,joint stiffness.In addition,thick skin was common,heart defects were occasional,protuberant abdomen and umbilical hernia were rarely reported.Conclusions The affected members in this family are in according with the clinical and genetic diagnosis of WMS.A novel mutation (c.5260G＞A) in FBN1 is discovered,which increases the spectrum of WMS mutation.The 41-42 exons of the FBN1 are hotspot of mutation in WMS.
ABSTRACT
El síndrome de Weill-Marchesani es un desorden genético poco frecuente del tejido conectivo con afectación ocular. Desde su descripción por Weill y Marchesani en 1932 y 1939, se han descrito patrones de herencia autosómica dominante y recesiva. En general estos pacientes se caracterizan por baja talla, braquidactilia con rigidez articular, microsferofaquia, miopía lenticular progresiva, luxación cristaliniana, y glaucoma secundario. Se presentan las características oftalmológicas y clínicas de una paciente a quien se le diagnosticó este síndrome genético. Procedía de una familia de 4 miembros donde uno de ellos presentaba similares características (padre), no se detectaron malformaciones cardiovasculares asociadas pero se recogen antecedentes de autoagresión. El desempeño del oftalmólogo en su diagnóstico precoz y manejo, es de vital importancia, de esta forma se podría lograr una rehabilitación visual y la consecuente incorporación a una vida socialmente útil.
Weil Marchesani syndrome is a rare genetic disorder of the connective tissue with ocular effect. Since the description of this disease by Weill and Marchesani in 1932 and 1939 respectively, patterns of autosomal dominant and recessive inheritance have been outlined. In general, these patients are characterized by small size, brachydactilia, joint rigidity, microspherophakia, progressive lenticular myopia, crystalline luxation and secondary glaucoma. This paper presented the ophthalmologic and clinical characteristics of a female patient who was diagnosed with this genetic syndrome. She came from a four-member family in which one of them presented with similar characteristics (father); there were not associated cardiovascular malformations, but self-attack history was included. The ophthalmologist's performance in the early diagnosis and management of the disease is of vital importance, because in this way, visual rehabilitation could be materialized, with subsequent incorporation to socially useful life.
ABSTRACT
PURPOSE: To present a case of Weill-Marchesani syndrome with corneal endothelial dysfunction due to anterior dislocation of a spherophakic lens and corneolenticular contact. METHODS: A 17-year-old woman presented with high myopia and progressive visual disturbance. She was of short stature and had brachydactyly. Her initial Snellen best corrected visual acuity (BCVA) was 20/50 (-sph 20.50 -cyl 3.00 Ax 180) in her right eye and 20/40 (-sph 16.00 -cyl 6.00 Ax 30) in her left eye. Slit lamp examination revealed a dislocated spherophakic lens touching corenal endothelium. A microspherophakic lens, hypoplastic ciliary body, and elongated zonules were confirmed on rotating Scheimpflug camera (Pentacam(R)) and on ultrasound biomicroscopy. Specular microscopy showed corneal endothealial dysfunction. Systemic evaluation was performed, and chromosomal study showed 46, XX, inv (15) (q13qter). The patient was diagnosed with Weill-Marchesani syndrome. RESULTS: Due to impending corneal decompensation, phacoemulsification and suture fixation of the intraocular lens were performed. The operation and postoperative course were uneventful. Three months postoperatively, the visual acuity was 20/30 (OD) and 20/40 (OS) without correction, and BCVA was 20/20 (+sph 0.50 -cyl 2.00 Ax 160 : OD) and 20/25 (+sph 1.50 -cyl 3.00 Ax 30 : OS). During the follow-up period, increased corneal endothelial counts, hexagonality, and decreased corneal thickness were achieved. CONCLUSIONS: In Weill-Marchesani syndrome with a chromosomal anomaly, a dislocated spherophakic lens may cause severe corneal endothelial dysfunction due to corneolenticular contact, and prompt lensectomy is important to prevent such complications.