Title
I-cell disease I-cell disease
Author
Faculty/Department
Faculty of Medicine and Health Sciences
Publication type
article
Publication
Berlin ,
Subject
Human medicine
Source (journal)
Acta neuropathologica. - Berlin
Volume/pages
64(1984) :3 , p. 234-242
ISSN
0001-6322
Carrier
E
Target language
Dutch (dut)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The results of postmortem examinations in four I-cell disease (ICD) patients, 2 weeks, 8.5 months, 4 and 10 years of age, respectively, are compared and evaluated. The most characteristic histological feature in ICD is the storage of membrane-bound vacuoles with fibrillo-granular contents in fibroblasts and of smaller inclusions with concentric ring-like profiles in endothelial cells. In older patients only, more heterogeneous cell inclusions with osmiophilic lamellar profiles may be found. The morphological lesions in the central nervous system (CNS) are hardly significant. Obvious abnormalities are present in the heart valves of even the very young patients, while alterations in the renal glomeruli are less severe in the long surviving patient. This difference may be viewed as histological confirmation of the proved genetic heterogeneity in ICD. The paradox of cell type-specific morphological findings on the one hand and the generalized deficiency of N-acetylglucosamine-1-phosphotransferase representing the primordial enzyme deficiency in ICD on the other, is resolved by postulating, outside the mannose-6-phosphate recognition marker targeting system, the existence of alternative mechanisms for distribution and processing of lysosomal enzymes in cells other than fibroblasts or endothelial cells.
Handle