Abstract:
PURPOSE:To identify the mutation in the RB1 gene in a Syrian family showing incomplete penetrance of retinoblastoma (RB). METHODS:Genomic DNA was used as a template for the PCR reaction to amplify all exons as well as the promoter region of RB1 gene. These PCR products were screened by conformational sensitive gel electrophoresis and the 331-bp product containing exon 21 showing anomalous migration was sequenced directly to identify the mutation. RESULTS:We identified the missense point mutation in exon 21 of the RB1 gene converting a Cys-->Arg (codon 712) in one family with a low penetrant phenotype. The proband was unilaterally affected, whereas the paternal uncle was bilaterally affected and the mutation carrier father was unaffected. The T-->C substitution abolished a cleavage site for the Nde I restriction enzyme, enabling rapid detection of the mutant allele. CONCLUSION:Phenotypically, this family is different from the previously described low penetrant phenotype pedigree with the same mutation whose affected members all had unilateral tumors. These results suggest that codon 712 may represent a mutational 'hot spot' for the low penetrant phenotypes and that the mutation codes for retinoblastoma protein with an apparently residual tumor-suppressive function give rise to low penetrance. These results also raise the interesting question: what other factors influence the phenotype of mutation carriers in addition to the predisposing missense mutation.
journal_name
Ophthalmic Genetjournal_title
Ophthalmic geneticsauthors
Ahmad NN,Melo MB,Singh AD,Donoso LA,Shields JAdoi
10.1076/opge.20.4.225.2269subject
Has Abstractpub_date
1999-12-01 00:00:00pages
225-31issue
4eissn
1381-6810issn
1744-5094journal_volume
20pub_type
杂志文章abstract::One of the treatment options for intraocular retinoblastoma is thermochemotherapy with diode laser combined with chemotherapy. Very little is known about the evolution of laser scars resulting from diode laser treatment for retinoblastoma. We report a case of atrophic chorioretinal scar and focal scleral bowing after ...
journal_title:Ophthalmic genetics
pub_type: 信件
doi:10.1080/13816810500481907
更新日期:2006-03-01 00:00:00
abstract:PURPOSE:Phototherapeutic keratectomy (PTK) with 193-nm excimer laser is a safe and effective procedure for the treatment of superficial corneal pathology. We aimed to review the use of PTK for the treatment of corneal macular dystrophy (MCD). METHODS:Case report and literature review. RESULTS:A 16-year-old boy presen...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2020.1776335
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abstract::Purposes: To describe the long-term follow-up of a patient affected by Pseudoxanthoma Elasticum (PXE) and acquired macular vitelliform lesions in both eyes. Material and methods: Case report Results: We reported the 9-year follow-up of a patient affected by PXE. We described the onset and the resolution of the vitelli...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2019.1666882
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abstract::Clinical findings of a 2.5-year-old girl presenting with barely detectable horizontal nystagmus and high hypermetropia are described. Despite the normal appearing anterior segments, the child had posterior microphthalmus and bilateral papillomacular retinal folds, conforming to a recently described, rare congenital di...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:
更新日期:2000-09-01 00:00:00
abstract:PURPOSE:Retinoblastoma (Rb) tumor recurrence in the papillary or macular region is a threat to life and visual prognosis respectively, making early detection indispensable. This study demonstrates the value of optical coherence tomography (OCT) in the early detection of subclinical tumor recurrence. METHODS:Since June...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2018.1436183
更新日期:2018-06-01 00:00:00
abstract::DNA samples are the fundamental research substrate in genetics. Although methodology and cost-effectiveness in molecular biology have improved dramatically, collecting biological samples and extracting DNA continue to be expensive and time-consuming steps of genetic research. This article reviews the issues surroundin...
journal_title:Ophthalmic genetics
pub_type: 杂志文章,评审
doi:10.1076/opge.22.1.49.2240
更新日期:2001-03-01 00:00:00
abstract::Background: Classical MMA, caused by methylmalonyl-CoA mutase deficiency, may result in late-onset dysfunction in several organ systems. To date, 10 cases of optic neuropathy have been reported. The prevalence of optic neuropathy in visually asymptomatic patients has not been determined. This study sought to identify ...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2019.1634740
更新日期:2019-08-01 00:00:00
abstract:BACKGROUND:Although the pathogenicity of the prominin-1 (PROM1) gene has already been described as associated with autosomal dominant Stargardt disease, little is known about sequence variations in this gene. PURPOSE:The aim of this study was to evaluate PROM1 gene sequence variations in patients with macular dystroph...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2016.1275022
更新日期:2017-01-01 00:00:00
abstract:PURPOSE:To report on a novel translocation related to a suprasellar primitive neuroectodermal tumor (sPNET) and retinoblastoma. DESIGN:Case report. METHODS:A 6-year-old girl underwent genetic testing after developing unilateral retinoblastoma subsequent to treatment (surgery, chemotherapy, and stem-cell rescue) for a...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816810.2012.719058
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abstract:BACKGROUND:A Chinese family with X-linked juvenile retinoschisis (XLRS) was identified. The purpose of this study was to identify genetic defects in this family and to investigate the visual function during the progression of the disease in the proband from childhood to adulthood. METHODS:The family history was collec...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816810.2011.628359
更新日期:2012-06-01 00:00:00
abstract::When encountering patients with markedly dilated and tortuous retinal vessels, Wyburn-Mason syndrome (WMS) or racemous angiomatosis (phacomatosis) is commonly thought of as the archetypal entity that can produce these findings. We describe a patient with Cantu syndrome with phenotypical findings identical to those see...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2019.1666415
更新日期:2019-10-01 00:00:00
abstract::Objectives: Optic neuritis (ON) is defined as inflammation of the optic nerve, which is mostly idiopathic. However, it can be associated with various causes (demyelinating lesions, autoimmune disorders, infectious and inflammatory conditions). Inflammatory demyelinating disorder of the optic nerve can be associated wi...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2019.1622022
更新日期:2019-06-01 00:00:00
abstract:BACKGROUND:Mutation in eye developmental genes has been reported to cause anophthalmia and microphthalmia. However, in India, especially in the Western Indian population, such reports are scarce. Hence, the present study aims to investigate mutations in 15 ocular developmental genes in patients with anophthalmia and mi...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2018.1436184
更新日期:2018-06-01 00:00:00
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journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1076/opge.19.1.55.2177
更新日期:1998-03-01 00:00:00
abstract:PURPOSE:In this study, we aimed to detect mutations in the SLC7A14 cationic transporter gene, which has recently been reported as a causative gene for retinitis pigmentosa (RP), in Japanese patients with autosomal recessive (AR) or sporadic RP. MATERIALS AND METHODS:We included 146 unrelated Japanese patients with AR ...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816810.2015.1136336
更新日期:2017-01-01 00:00:00
abstract:PURPOSE:To present a boy with unilateral duplication of the eye. METHOD:The case history is described from the first visit at birth to the age of 14 years. RESULTS:A review of the literature shows that this malformation is compatible with life although malformations of the brain and epilepsy have been reported in all...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810701209479
更新日期:2007-06-01 00:00:00
abstract:BACKGROUND:Functional polymorphisms in genes encoding antioxidant enzymes may result in reduced enzyme activity and increased levels of reactive oxygen species, such as superoxide radicals, which in turn may contribute to increased risk of age-related disorders. Copper-zinc superoxide dismutases, SOD-1 and SOD-3, and m...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816810.2012.746377
更新日期:2013-09-01 00:00:00
abstract::A genetic register for inherited retinal degenerative disorders (RDDs) has been established at the Division of Human Genetics, UCT Medical School, Cape Town, South Africa. The primary role of the register is to monitor the progress of molecular research and to facilitate the efficient delivery of services, including g...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1076/opge.23.1.61.2207
更新日期:2002-03-01 00:00:00
abstract::Photoaversion is a prominent symptom of a number of infantile genetic ocular disorder such as congenital glaucoma, aniridia, albinism, and cone dystrophies including achromatopsia. Photoaversion has not been widely recognized as a clinical feature of Leber's congenital amaurosis. We present two patients who were diagn...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816819509057851
更新日期:1995-03-01 00:00:00
abstract::The identification by fundus examination of those females carrying an X-linked retinitis pigmentosa (RP) gene can reportedly be as high as 87%. In genetic counselling sessions with young females with a 50% risk of being a carrier who wished to know their status, it has not been possible to achieve such a level of succ...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816819509059970
更新日期:1995-09-01 00:00:00
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journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810500229025
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journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2019.1660382
更新日期:2019-08-01 00:00:00
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journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816810.2014.921314
更新日期:2014-09-01 00:00:00
abstract:BACKGROUND:Posterior column ataxia retinitis pigmentosa (PCARP) with feline leukemia virus subgroup C cellular receptor 1 (FLVCR1) gene mutation is a rare disorder with significant ophthalmic features. MATERIALS AND METHODS:We conducted a retrospective case series study of patients diagnosed with PCARP and genetic tes...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2018.1547913
更新日期:2018-12-01 00:00:00
abstract::Background: Chromosomal deletion involving the 6p25 region results in a clinically recognizable syndrome characterized by anterior eye chamber anomalies with risk of glaucoma and non-ocular malformations (6p25 deletion syndrome). We report a newborn infant case of childhood glaucoma with a combination of partial monos...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2020.1744019
更新日期:2020-04-01 00:00:00
abstract:BACKGROUND:A number of mutations in the VSX1 and SOD1 genes have been reported to be associated with keratoconus (KC), however the results from different studies are controversial. In this study, we conducted the genotyping of common polymorphisms [VSX1: D144E, H244R, R166W, G160D; SOD1: intronic 7-base deletion (c.169...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816810.2013.843712
更新日期:2015-01-01 00:00:00
abstract:BACKGROUND:Senior-Løken syndrome (SLS) is a rare autosomal recessive disease characterised by nephronophthisis and retinal degeneration, and belongs to a group of genetically heterogeneous disorders known as the ciliopathies. MATERIALS AND METHODS:Case report of a patient with genetically proven SLS presenting with h...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2020.1766086
更新日期:2020-08-01 00:00:00
abstract:PURPOSE:To perform genotype-phenotype correlations in a family with choroideremia. METHODS:A three-generation family with two affected males and five carriers was the subject of the study. Molecular genetic analysis using single-strand conformation polymorphism analysis (SSCP) was conducted in all subjects, while elec...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1076/opge.24.4.203.17232
更新日期:2003-12-01 00:00:00
abstract:PURPOSE:Genetic factors are shown to have a role in the development of primary open-angle glaucoma (POAG). The aim of this study was to determine the effects of genetic polymorphisms of Rho-kinase (ROCK) genes on the risk of POAG in a Turkish population. METHODS:Genomic DNA was extracted from leukocytes of the periphe...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.3109/13816810.2014.895016
更新日期:2016-01-01 00:00:00
abstract::Background: Retinitis punctate albescens (RPA) is a rare form of retinal dystrophy characterized by congenital stationary night blindness and a characteristic fundus appearance. Missense or nonsense mutations in RDH5 in homozygous or heterozygous state have been implicated in RPA.Material and methods: Two consanguineo...
journal_title:Ophthalmic genetics
pub_type: 杂志文章
doi:10.1080/13816810.2019.1709124
更新日期:2020-02-01 00:00:00