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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

New autosomal-recessive syndrome of Leber congenital amaurosis, short stature, growth hormone insufficiency, mental retardation, hepatic dysfunction, and metabolic acidosis.

We report on a new autosomal-recessive syndrome in 4 Japanese children in 2 families. The key manifestations are Leber congenital amaurosis, short stature, growth hormone insufficiency, mental retardation, hepatic dysfunction, metabolic acidosis, and autosomal-recessive inheritance. There were no consanguineous marriages. Abnormal eye movements were noticed neonatally, and ophthalmological examinations showed no visual acuity, pigmentary retinal degeneration, and nonrecordable electroretinograms in all cases. Inadequate weight gain and short stature gradually became apparent after birth, and at present the height range is -4.6 - -7.2 SD (standard deviations). Developmental delay was noted at age 4 months, and the developmental quotient is 50-70 at present. Deterioration of development and convulsions were not recognized. Elevated serum aminotransferase levels and metabolic acidosis were also found at age 4 months. Proximal renal tubular acidosis was clarified by bicarbonate tolerance tests in 1 case, and may have caused metabolic acidosis. Growth hormone secretion was insufficient by insulin tolerance test in 3 cases. One year of growth hormone therapy in 2 cases did not affect growth velocity. Hepatic dysfunction and metabolic acidosis ameliorated later. No renal cysts were found. A cranial computed tomographic scan and magnetic resonance imaging showed normal findings. Amino acids, organic acids, and very long chain fatty acid levels in plasma were all normal in the 3 cases examined. Histopathological and mitochondrial DNA analyses showed no evidence of mitochondrial disorders.[1]


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