Abstract

HEREDITARY ataxia in rabbits is due to a recessive mutant gene ( ax ). The pathology begins in adolescence and progressively involves lateral brainstem nuclei and deep cerebellar nuclei. The clinical and morphological features have been described by Sawin et al 1 and by O'Leary and his associates. 2 Glycogen deposits in the neuropil of the involved areas have been demonstrated 3 and a study of brain glycogen metabolism has been published by Tourtellotte and his co-workers. 4 Glucose-6-phosphate was found to be significantly elevated with other intermediates at normal levels. Normal also were the amino acid spectra of brain and urine from ataxic rabbits as determined by Weinstein et al. 5 Further biochemical studies were directed toward the lipid composition of the brainstem areas with histological evidence of lesions. A decrease in the concentration of inositolphosphatides was found 6 and the present communication is an extension of these observations with

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