Helaina Klein

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Retinitis pigmentosa belongs to a large group of degenerative diseases of the retina with a hereditary background. It involves loss of retinal photoreceptor cells and consequently peripheral vision. At present there are no satisfactory therapeutic options for this disease. Just recently the use of mesenchymal stem cells has been discussed as one(More)
In a family with two children affected by juvenile neuronal ceroid lipofuscinosis (JNCL) an attempt was made at the prenatal diagnosis of the disorder. The following tissues from the fetus at risk were investigated by electron microscopy and were found to be free of fingerprint profiles and curvilinear bodies, typical for JNCL: uncultivated amniotic fluid(More)
An 11-year-old girl was found to have severely reduced beta-galactocerebrosidase activity as evidence of late-onset globoid cell leukodystrophy, while her mother had almost normal enzyme activity in circulating white blood cells. Clinically, the patient showed a remitting course marked by seizures, ataxia, white-matter disease on computed tomographic scan,(More)
PURPOSE To determine the effect of drusen and geographic atrophy (GA) in dry age-related macular degeneration on retinal sensitivity using an eye tracking scanning laser ophthalmoscope microperimetry. METHODS A total of 44 eyes from 22 patients with dry age-related macular degeneration and drusen and 11 patients with GA were imaged with scanning laser(More)
A 9-year-old boy who had died of infantile neuronal ceroid-lipofuscinosis had experienced retina-derived visual failure. Ophthalmologically and morphologically, his retina was severely atrophic and scarred by a dense fibrillary gliosis while photoreceptor cells had completely disappeared, cells of the bipolar layer had decreased in number and had become(More)
The urinary excretion of catecholamines in 13 close relatives of two distantly related patients with congenital neuroblastoma was investigated. One of these relatives was a child with already known ganglioneuroblastoma. The catecholamines noradrenaline and dopamine were determined. Vanilmandelic acid and homovanillic acid also were determined and numerous(More)
The aim of this work is to study the possible association between retinal nerve fiber layer (NFL) thickness and driving ability. Thirty-eight drivers including 22 HIV-positive (HIV+) and 16 age-matched HIV-negative controls participants underwent a full ophthalmologic evaluation, including assessment of retinal NFL thickness. In the undilated state with(More)
A cytogenetic investigation was performed in a family which included 2 individuals with congenital neuroblastomas of the suprarenal gland confirmed by autopsy and one with a ganglioneuroblastoma of the thoracic wall as well as 3 other individuals with tumors which probably were also neuroblastomas. The lymphocytes of the peripheral blood of 5 healthy(More)