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PubMed1986

Infantile Refsum disease: deficiency of catalase-containing particles (peroxisomes), alkyldihydroxyacetone phosphate synthase and peroxisomal beta-oxidation enzyme proteins.

In recent years a number of biochemical abnormalities have been described in patients with the infantile form of Refsum disease, including the accumulation of very long chain fatty acids, trihydroxycoprostanoic acid and pipecolic acid. In this paper we show that catalase-containing particles (peroxisomes), alkyl dihydroxyacetone phosphate synthase and acyl-CoA oxidase protein are deficient in patients with infantile Refsum disease. These findings suggest that in the infantile form of Refsum disease, as in the cerebro-hepato-renal (Zellweger) syndrome the multiplicity of biochemical abnormalities is due to a deficiency of peroxisomes and hence to a generalized loss of peroxisomal functions. As a consequence the infantile form of Refsum disease can be diagnosed biochemically by methods already available for the prenatal and postnatal diagnosis of the cerebro-hepato-renal (Zellweger) syndrome.

Acatalasia↗
PubMed1985

Steroid sulphatase deficiency disease.

Seventy-six ichthyotic male patients with a biochemically confirmed diagnosis of steroid sulphatase deficiency are reported. Ascertainment was based on either a previous diagnosis of placental steroid sulphatase deficiency (21 probands and 15 secondary cases), or ichthyosis with steroid sulphatase deficiency (29 probands and 11 secondary cases). The ichthyotic phenotype of the first group was indistinguishable from that of the other group, and completely fitting the classic description of recessive X-linked ichthyosis. A prominent skin peeling in early infancy was found to be a characteristic feature of this syndrome. Maldescent of the testis was registered in 9 patients; and testis cancer had been diagnosed in 2 males with normally descended gonads. This high proportion of patients with gonadal abnormalities strongly indicates a relation with the steroid sulphatase deficiency. Corneal opacities, not affecting visual acuity, were seen in 14 out of 28 males by slit-lamp examination.

Adolescent↗
PubMedDate not supplied

[Role of folic-acid deficiency in deficiency diseases of the nervous system. Apropos of 12 cases including an anatomo-clinical case].

The authors report 12 cases of neurological syndromes due to folic acid deficiency, due in 8 cases to chronic alcoholism. In 5 cases there was polyneuritis, 3 cases had cerebellar atrophy, whilst 4 patients had subacute combined degeneration of the cord. Folic acid deficiency occurred alone in five cases out of twelve, as in 3 cases vitamin B1 deficiency was associated, and in four cases there was malabsorption of vitamin B12. A neuropathological study of these cases showed: 1) moderate involvement of the mamillary tubercles as observed in deficiency encephalopathies. 2) severe peripheral nerve involvement especially of axonal type. 3) involvement of the anterior horns of the spinal cord with appearances of central chromatolysis and a few atrophic neurones.

Adult↗
PubMed1986

Zinc and its deficiency diseases.

The pervasive role of zinc in the metabolic function of the body results from its function as a cofactor of a multitude of enzymes. Zinc is found in every tissue in the body, and because zinc metalloenzymes are found in every known class of enzymes, the metal has a function in every conceivable type of biochemical pathway. Symptoms resulting from zinc deficiency are as diverse as the enzymes with which the metal is associated. If chronic, severe, and untreated, zinc deficiency can be fatal. Less drastic symptoms include infections, hypogonadism, weight loss, emotional disturbance, dermatitis, alopecia, impaired taste acuity, night blindness, poor appetite, delayed wound healing, and elevated blood ammonia levels. Many symptoms of zinc deficiency result from poor diet consumption, but often the most severe symptoms result from other factors including excessive alcohol use, liver diseases, malabsorption syndromes, renal disease, enteral or parenteral alimentation, administration of sulfhydryl-containing drugs, and sickle cell disease. The most severe symptoms of zinc deficiency occur in young children affected with the autosomal-recessive trait, acrodermatitis enteropathica. This disease results in decreased synthesis of picolinic acid which causes an impaired ability to utilize zinc from common food. Because simple laboratory analyses are often not reliable in determining zinc nutriture of a patient, those symptoms caused by suspected zinc deficiency are best verified by the oral administration of zinc dipicolinate. This zinc compound is efficacious and safe and would provide an accurate means of identifying symptoms that do result from zinc deficiency.

Humans↗