| I-cell | A cultured skin fibroblast containing membrane-bound inclusions; characteristic of mucolipidosis II. See: immunocyte. Synonym: inclusion cell. (05 Mar 2000) |
|---|---|
| I-cell disease | <biochemistry> Mucolipidosis of early onset and with severe symptoms like those in Hurler's syndrome but with normal urinary mucopolysaccharides, vacuolated lymphocytes, and inclusion bodies in cultured fibroblasts (I-cells). The lysosomes lack hydrolases but high concentrations of lysosomal enzymes are found in the extracellular fluids such as serum, spinal fluid, and urine. It is associated with a deficiency of N-acetylglucosaminyl-1-phosphotransferase. The gene defect responsible probably prevents the addition of the lysosome recognition marker mannose 6 phosphate) to these enzymes so that they are not directed into the lysosomes but are released. Inheritance: autosomal recessive. Synonym: I-cell disease, inclusion cell disease. (12 Jul 2000) |