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Ophthalmic Genetics

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https://www.readbyqxmd.com/read/29757052/multimodal-characterization-of-a-novel-mutation-causing-vitamin-b6-responsive-gyrate-atrophy
#1
Xuan Cui, Ruben Jauregui, Karen Sophia Park, Stephen H Tsang
PURPOSE: Gyrate atrophy (GA) is a rare chorioretinal degeneration that results in the deterioration of night and peripheral vision, eventually leading to blindness. The disorder is caused by mutations in the gene encoding ornithine aminotransferase (OAT), causing increased levels of plasma ornithine. Treatment revolves around lowering plasma ornithine levels, with vitamin B6 supplementation being the preferred treatment. Nevertheless, most patients do not respond to this therapy. Here, we report a rare case of vitamin B6-responsive GA caused by a novel mutation in OAT and characterize the presentation with multimodal imaging...
May 14, 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29718797/cep250-mutations-associated-with-mild-cone-rod-dystrophy-and-sensorineural-hearing-loss-in-a-japanese-family
#2
Daiki Kubota, Kiyoko Gocho, Sachiko Kikuchi, Keiichiro Akeo, Masahiro Miura, Kunihiko Yamaki, Hiroshi Takahashi, Shuhei Kameya
BACKGROUND: CEP250 encodes the C-Nap1 protein which belongs to the CEP family of proteins. C-Nap1 has been reported to be expressed in the photoreceptor cilia and is known to interact with other ciliary proteins. Mutations of CEP250 cause atypical Usher syndrome which is characterized by early-onset sensorineural hearing loss (SNHL) and a relatively mild retinitis pigmentosa. This study tested the hypothesis that the mild cone-rod dystrophy (CRD) and SNHL in a non-consanguineous Japanese family was caused by CEP250 mutations...
May 2, 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29718750/moniliform-blepharosis-in-lipoid-proteinosis-with-a-homozygous-ecm1-gene-mutation
#3
Ozlem Barut Selver, Melis Palamar, Huseyin Onay, Onur Furundaoturan, Taner Akalın, Mukaddes Aysin Noyan
No abstract text is available yet for this article.
May 2, 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29693493/targeted-next-generation-sequencing-reveals-that-a-compound-heterozygous-mutation-in-phosphodiesterase-6a-gene-leads-to-retinitis-pigmentosa-in-a-chinese-family
#4
Shanshan Zhang, Jie Li, Shujin Li, Yeming Yang, Mu Yang, Zhenglin Yang, Xianjun Zhu, Lin Zhang
PURPOSE: Retinitis pigmentosa (RP) is a genetically heterogeneous disease with over 70 causative genes identified to date. However, approximately 40% of RP cases remain genetically unsolved, suggesting that many novel disease-causing mutations are yet to be identified. The purpose of this study is to identify the causative mutations of a Chinese RP family. METHODS: Targeted next-generation sequencing (NGS) for a total of 163 genes which involved in inherited retinal disorders were used to screen the possible causative mutations...
April 25, 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29671671/progressive-expansion-of-the-hyperautofluorescent-ring-in-cone-rod-dystrophy-patients
#5
Luiz H Lima, Claudio Zett, Vinícius Kniggendorf, Bruna Marianelli, Ricardo A P de Carvalho, Michel E Farah, Juliana M F Sallum
PURPOSE: To evaluate the expansion of the hyperautofluorescent ring and the retinal structure changes over time in cone-rod dystrophy (CRD) patients, using fundus autofluorescence (FAF) and spectral-domain optical coherence tomography (SD-OCT). METHODS: Retrospective case series study. Six eyes of three CRD patients with a parafoveal hyperautofluorescent ring were studied. The diagnosis of CRD was established by the presence of the implicit time shift at 30-Hz flicker and prevalent decrease of photopic over scotopic responses on electroretinography...
April 19, 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29671669/confirmation-and-refinement-of-the-heterozygous-deletion-of-the-small-leucine-rich-proteoglycans-associated-with-posterior-amorphous-corneal-dystrophy
#6
Aleck E Cervantes, Katherine M Gee, Martha F Whiting, Ricardo F Frausto, Anthony J Aldave
PURPOSE: To present the clinical and cytogenetic features of a previously unreported family with posterior amorphous corneal dystrophy (PACD) associated with a heterozygous deletion of the small leucine-rich proteoglycan (SRLP) genes on chromosome 12. METHODS: Clinical characterization was performed using slit lamp biomicroscopic and optical coherence tomography (OCT) imaging. Genomic DNA was collected from affected and unaffected family members, and a cytogenomic array was used to identify copy number variations (CNV) present in the PACD locus...
April 19, 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29671668/pediatric-primary-calcific-band-keratopathy-with-or-without-glaucoma-from-biallelic-slc4a4-mutations
#7
Arif O Khan, Omar S Basamh
Biallelic mutations in the gene SLC4A4 (Solute Carrier Family 4 Member 4) cause protean manifestations in children that include proximal retinal tubular acidosis, developmental delay, band keratopathy, and glaucoma. A unique SLC4A4 mutation causes an ocular-only phenotype. In this retrospective case series, we highlight our experience with children referred to a pediatric ophthalmologist who were found to harbor underlying biallelic SLC4A4 mutations.
April 19, 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29634382/early-photoreceptor-outer-segment-loss-and-retinoschisis-in-cohen-syndrome
#8
Katherine E Uyhazi, Gil Binenbaum, Nicholas Carducci, Elaine H Zackai, Tomas S Aleman
PURPOSE: To describe early structural and functional retinal changes in a patient with Cohen syndrome. METHODS: A 13-month-old Caucasian girl of Irish and Spanish ancestry was noted to have micrognathia and laryngomalacia at birth, which prompted a genetic evaluation that revealed biallelic deletions in COH1 (VPS13B) (a maternally inherited 60-kb deletion involving exons 26-32 and a paternally inherited 3.5-kb deletion within exon 17) consistent with Cohen syndrome...
April 10, 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29630435/autosomal-dominant-retinitis-pigmentosa-with-macular-involvement-associated-with-a-disease-haplotype-that-included-a-novel-prph2-variant-p-cys250gly
#9
Satoshi Katagiri, Takaaki Hayashi, Kei Mizobuchi, Kazutoshi Yoshitake, Takeshi Iwata, Tadashi Nakano
BACKGROUND: It is known that PRPH2 variants appear to be rare causes of retinitis pigmentosa (RP) in the Japanese population. The purpose of this study was to describe clinical and genetic features in autosomal dominant RP (adRP) patients with a novel disease-causing variant in the PRHP2 gene. MATERIALS AND METHODS: A total of 57 unrelated Japanese probands with adRP were investigated in this study. Comprehensive ophthalmic examinations include fundus photography, fundus autofluorescence imaging, spectral-domain optical coherence tomography, and electroretinography...
April 9, 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29617172/a-case-of-exudative-vitreoretinopathy-and-chorioretinal-coloboma-associated-with-microcephaly-in-a-female-with-contiguous-xp11-3-11-4-deletion
#10
Anne-Marie Hinds, Elisabeth Rosser, M Ashwin Reddy
The constellation of signs including microcephaly, retinal colobomas, and exudative vitreo-retinopathy suggests a mutation of the KIF-11 gene on chromosome 10q. We report a female infant with these features but due, instead, to a contiguous gene deletion on chromosome Xp including the OMIM morbid genes CASK, KDM6A, NDP, MAOA, NYX, and DDX3X. The NDP deletion could account for the exudative retinopathy and the CASK deletion for the microcephaly, while CASK and KDM6A have both been associated with coloboma. This case highlights genetic heterogeneity for the clustering of these signs...
April 4, 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29578815/response-to-khetan-and-maitray-s-comment-conservative-management-of-massive-choroidal-relapse-in-retinoblastoma-patients
#11
Christina Stathopoulos, Marie-Claire Gaillard, Francesco Puccinelli, Philippe Maeder, Doris Hadjistilianou, Maja Beck-Popovic, Francis Munier
No abstract text is available yet for this article.
March 26, 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29578813/comment-conservative-management-of-massive-choroidal-relapse-in-retinoblastoma-patients
#12
Vikas Khetan, Aditya Maitray
No abstract text is available yet for this article.
March 26, 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29676688/ophthalmic-manifestations-of-heimler-syndrome-due-to-pex6-mutations
#13
Nutsuchar Wangtiraumnuay, Waleed Abed Alnabi, Mai Tsukikawa, Avrey Thau, Jenina Capasso, Reuven Sharony, Chris F Inglehearn, Alex V Levin
BACKGROUND/AIMS: Pigmentary retinal dystrophy and macular dystrophy have been previously reported in Heimler syndrome due to mutations in PEX1. Here we reported the ocular manifestations in Heimler syndrome due to mutations in PEX6. MATERIALS AND METHODS: Medical records were reviewed to identify patient demographics, ophthalmic and systemic findings, and results of diagnostic testing including whole genome sequencing. RESULTS: Patient 1 is 12-year-old boy with a novel mutation c...
June 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29513055/intravitreal-chemotherapy-and-laser-for-newly-visible-subretinal-seeds-in-retinoblastoma
#14
David H Abramson, Federica Catalanotti, Scott E Brodie, Michael G Kellick, Jasmine H Francis
BACKGROUND: There has been no effective method for treating newly visible ("new") subretinal seeding in retinoblastoma except enucleation. The objective of this report is to determine whether intravitreal chemotherapy combined with 810 nm indirect laser can successfully treat retinoblastoma eyes with "new" subretinal seeding which appeared after intra-arterial chemotherapy (ophthalmic arterial chemosurgery: OAC). MATERIAL AND METHODS: Single center retrospective study from a tertiary cancer hospital of a case series of 14 eyes treated with combined intravitreal chemotherapy and laser from 2012 to 2017...
June 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29465286/genetic-association-of-single-nucleotide-polymorphisms-of-fzd4-and-bdnf-genes-with-retinopathy-of-prematurity
#15
Zora Lasabova, Andrea Stanclova, Marian Grendar, Silvia Mikolajcikova, Andrea Calkovska, Nina Lenhartova, Peter Ziak, Katarina Matasova, Martin Caprnda, Peter Kruzliak, Mirko Zibolen
BACKGROUND: Retinopathy of prematurity (ROP) is a multifactorial disease occurring in preterm neonates, caused by incorrect development of retinal blood vessels. It has been suggested that, in addition to gestational age, weight, and oxygen supplementation, genetic factors can play a role in the pathogenesis of ROP. METHODS: In the present prospective study, 97 neonates were enrolled based on the gestational age and weight, and genomic DNA from patients diagnosed with ROP and premature newborns without ROP was collected...
June 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29461140/genetic-investigation-of-ocular-developmental-genes-in-52-patients-with-anophthalmia-microphthalmia
#16
Nair Gopinathan Vidya, Sankaranarayanan Rajkumar, Abhay R Vasavada
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 microphthalmia in the western region of India. MATERIALS AND METHODS: Genomic DNA was isolated from the blood of 52 individuals affected with microphthalmia and anophthalmia, and 50 healthy normal controls...
June 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29424610/oct-guided-management-of-subclinical-recurrent-retinoblastoma
#17
Marie-Claire Gaillard, Susan Houghton, Christina Stathopoulos, Francis L Munier
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 2012, hand-held SD-OCT (spectral domain Optical Coherence Tomography) of retro-equatorial foci, the optic head nerve and macula, is systematically performed under anesthesia in children treated and followed for Rb...
June 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29419336/case-report-of-four-siblings-in-southeast-turkey-with-a-novel-rab3gap2-splice-site-mutation-warburg-micro-syndrome-or-martsolf-syndrome
#18
Evren Gumus
BACKGROUND: Warburg micro syndrome is a very rare autosomal recessive disorder characterized by a mutation in the RAB3GAP1, RAB3GAP2, RAB18, and TBC1D20 genes. Warburg Micro syndrome 2 and Martsolf syndrome are clinically overlapping conditions characterized by variable clinical signs counting postnatal growth retardation, cataract, intellectual deficiency, contractures, and central nervous system abnormalities due to RAB3GAP2 gene mutations. The RAB3GAP2 gene encodes a member of the Rab3 protein family, which is involved in regulated exocytosis of neurotransmitters and hormones...
June 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29405792/identification-and-genotype-phenotype-correlation-of-novel-mutations-in-six6-gene-in-primary-open-angle-glaucoma
#19
Kuldeep Mohanty, Rima Dada, Tanuj Dada
BACKGROUND: Recently SIX1 and SIX6 genes have been associated with primary open angle glaucoma (POAG). This study was planned to do mutation screening in SIX1 and SIX6 genes in North Indian POAG patients and correlate with clinical phenotypes. MATERIALS AND METHODS: SIX1 and SIX6 genes were amplified by PCR and sequenced in 115 POAG cases and 105 controls. Four pathogenecity prediction tools (MutationTaster, PolyPhen-2 HumDiv, PolyPhen-2 HumVar and SIFT) were used to predict the pathogenicity of the missense mutations...
June 2018: Ophthalmic Genetics
https://www.readbyqxmd.com/read/29405783/identification-of-pitx3-mutations-in-individuals-with-various-ocular-developmental-defects
#20
Celia Zazo Seco, Julie Plaisancié, Tatiana Lupasco, Caroline Michot, Jacmine Pechmeja, Julian Delanne, Edouard Cottereau, Carmen Ayuso, Marta Corton, Patrick Calvas, Nicola Ragge, Nicolas Chassaing
BACKGROUND: Congenital cataract displays large phenotypic (syndromic and isolated cataracts) and genetic heterogeneity. Mutations in several transcription factors involved in eye development, like PITX3, have been associated with congenital cataracts and anterior segment mesenchymal disorders. MATERIALS AND METHODS: Targeted sequencing of 187 genes involved in ocular development was performed in 96 patients with mainly anophthalmia and microphthalmia. Additionally, Sanger sequencing analysis of PITX3 was performed on a second cohort of 32 index cases with congenital cataract and Peters anomaly and/or sclereocornea...
June 2018: Ophthalmic Genetics
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