@article {1956, title = {A novel CRYBB2 missense mutation causing congenital autosomal dominant cataract in an Italian family.}, journal = {Ophthalmic Genet}, volume = {34}, year = {2013}, month = {2013 Mar-Jun}, pages = {115-7}, abstract = {

Congenital cataract is a leading cause of visual impairment in children and brings approximately 10\% of childhood blindness worldwide. Molecular analysis revealed ~60 loci to be associated with several phenotypes of childhood cataracts. Until now, more than 30 loci and 18 genes on different chromosomes have been associated with autosomal dominant congenital cataract (ADCC). Here, we present a three-generation Italian family with a non syndromic ADCC. A linkage analysis carried out using HumanCytoSNP-12 DNA Analysis BeadChip led us to identify ten genomic regions virtually involved in the disease. All the genes located in these regions were scored for possible relationship with ADCC and, according to a strict clinical and genetic selection, 4 genes have been analyzed. A novel sequence variant was found in the CRYBB2 gene (p.Ser143Phe). This variant affects a conserved aminoacid in the third Greek key motif of the protein, cosegregates with the disease phenotype in all affected individuals and is not present both in the unaffected family members and 100 healthy control subjects. Finally, we identified the first CRYBB2 mutation in an Italian family causing a clinical picture of ADCC.

}, keywords = {Amino Acid Sequence, beta-Crystallin B Chain, Cataract, DNA Mutational Analysis, Female, Genes, Dominant, Genetic Linkage, Genotype, Humans, Italy, Male, Molecular Sequence Data, Mutation, Missense, Pedigree, Phenotype}, issn = {1744-5094}, doi = {10.3109/13816810.2012.707273}, author = {Faletra, Flavio and d{\textquoteright}Adamo, Adamo Pio and Pensiero, Stefano and Athanasakis, Emmanouil and Catalano, Dario and Bruno, Irene and Gasparini, Paolo} } @article {1720, title = {Horizontal gaze palsy and progressive scoliosis without ROBO3 mutations.}, journal = {Ophthalmic Genet}, volume = {32}, year = {2011}, month = {2011 Nov}, pages = {212-6}, abstract = {

BACKGROUND: To describe clinical and genetic observations in a patient with horizontal gaze palsy and progressive scoliosis (HGPPS) without identified mutations in the ROBO3 gene.

MATERIALS AND METHODS: Neurologic and orthopedic evaluation of the proband; sequencing all exons, exon-intron boundaries, and promoter region of ROBO3 in the proband and his mother. Array CGH was also carried out in the proband and his mother to evaluate possible chromosomal deletion(s) and/or duplication(s).

RESULTS: The proband had complete horizontal gaze restriction with full vertical gaze and small amplitude horizontal pendular nystagmus. He also had severe scoliosis and brainstem hypoplasia pathognomonic of HGPPS. However, complete sequencing of ROBO3 twice in both forward and reverse directions did not reveal any mutations. Array CGH investigation revealed no chromosomal abnormalities.

CONCLUSIONS: This patient had clinical and neuroimaging characteristics considered pathognomonic of HGPPS and yet did not have ROBO3 mutations. A clinical misdiagnosis is unlikely in the absence of facial weakness (typical of Moebius syndrome), deafness (typical of the HOXA1 spectrum), or mental retardation (typical of other central decussation abnormalities). It is perhaps more likely that a phenotype identical to HGPPS can be caused by abnormalities in ROBO3 splice variant expression, by mutations of a gene other than ROBO3, or by some environmental or epigenetic factor(s) inhibiting the action of ROBO3 or its protein product in the developing brainstem.

}, keywords = {Child, Humans, Kyphosis, Magnetic Resonance Imaging, Male, Mutation, Ocular Motility Disorders, Oculomotor Nerve Diseases, Pedigree, Receptors, Immunologic, Scoliosis}, issn = {1744-5094}, doi = {10.3109/13816810.2011.574186}, author = {Abu-Amero, Khaled K and Faletra, Flavio and Gasparini, Paolo and Parentin, Fulvio and Pensiero, Stefano and Alorainy, Ibrahim A and Hellani, Ali M and Catalano, Dario and Bosley, Thomas M} }