Mucolipidosis IV: novel mutation and diverse ultrastructural spectrum in the skin.

Abstract:

:Mucolipidosis IV, a severe neurologic and ophthalmologic progressive disorder has a clinical range of onset between early childhood and adolescence entailing clinically severe, moderate, and mild forms, all of them majorly affecting Ashkenazi Jewish patients in an autosomal-recessive fashion owing to mutations in the MCOLN1 gene which encodes a transmembrane protein called mucolipin 1. We report on one of two affected siblings, the older brother having died of ML IV at the age of 33 years, the younger recently at the age of 37 years. Biopsied skin disclosed several types of lysosomal residual bodies, membrane-bound vacuoles, avacuolar lamellar bodies resembling membraneous cytoplasmic bodies, and a diverse spectrum of lipopigments which include curvilinear and fingerprint profiles. Contrary to earlier reports, disease-specific lysosomal residual bodies could not be identified in circulating lymphocytes of our patient. Mutation analysis revealed a homozygous novel mutation of a 34 bp deletion and 3 bp insertion in exon 2 of the MCOLN1 gene, perhaps the reason for this unusual clinical and morphological phenotype.

journal_name

Neuropediatrics

journal_title

Neuropediatrics

authors

Bargal R,Goebel HH,Latta E,Bach G

doi

10.1055/s-2002-34496

subject

Has Abstract

pub_date

2002-08-01 00:00:00

pages

199-202

issue

4

eissn

0174-304X

issn

1439-1899

journal_volume

33

pub_type

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