alexa Metachromatic leukodystrophy | Japan | PDF | PPT| Case Reports | Symptoms | Treatment

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Metachromatic Leukodystrophy

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  • Metachromatic leukodystrophy

    Metachromatic leukodystrophy is an inherited disorder characterized by the accumulation of fats called sulfatides in cells. This accumulation especially affects cells in the nervous system that produce myelin, the substance that insulates and protects nerves. Nerve cells covered by myelin make up a tissue called white matter. Sulfatide accumulation in myelin-producing cells causes progressive destruction of white matter (leukodystrophy) throughout the nervous system, including in the brain and spinal cord.

  • Metachromatic leukodystrophy

    Causes: Metachromatic leukodystrophy (MLD) is usually caused by the lack of an important enzyme called arylsulfatase A. Because this enzyme is missing, chemicals called sulfatides build up in and damage the nervous system, kidneys, gallbladder, and other organs. In particular, the chemicals damage the protective sheaths that surround nerve cells. The disease is passed down through families (inherited). You must get a copy of the defective gene from both your parents to have the disease. 

  • Metachromatic leukodystrophy

    Diagnosis: Tests that may be done include: Blood or skin culture to look for low arylsulfatase A activity, Blood test to look for low arylsulfatase A enzyme levels, CT scan, DNA testing for the ARSA gene, MRI, Nerve biopsy, Nerve signalling studies, Urinalysis, Urine chemistry.
    Treatment: There is no cure for MLD. Care focuses on treating the symptoms and preserving the patient's quality of life with physical and occupational therapy.

  • Metachromatic leukodystrophy

     In Japan, we report two autopsy cases of siblings with adult-onset autosomal dominant leukodystrophy characterized by destruction of cerebral white matter, large numbers of axonal spheroids and pigmented glia in the fronto-temporal lobes. Both patients presented with motor and cognitive symptoms and aphasia, 2-3 years before death. At autopsy, the brain showed brown coloration and decreased volume of white matter in the frontal and temporal lobes as well as corpus callosum.

 

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