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Ultrastructural studies in fetal I-cell disease
Pediatric Research
|July 1, 1976
Summary
Fetal I-cell disease causes abnormal cytoplasmic inclusions in various fetal organs, including the skin, brain, lung, liver, and kidney. These inclusions resemble residual bodies found in phagocytic cells.
Area of Science:
- Cell Biology
- Developmental Biology
- Pathology
Background:
- I-cell disease, also known as mucolipidosis II, is a severe lysosomal storage disorder.
- Prenatal diagnosis is possible via amniocentesis, allowing for early identification of affected fetuses.
Observation:
- Microscopic examination of fetal tissues (skin, brain, lung, liver, kidney) and cultured fibroblasts.
- Light and electron microscopy were used to identify and characterize cytoplasmic inclusions.
Findings:
- Dense cytoplasmic inclusions were prevalent in capillary endothelial cells, kidney tubules, hepatocytes, and brain cells of the fetus.
- Erythropoietic cells and erythrocytes also contained inclusions. Cultured fibroblasts were filled with dense inclusions, distinct from the clear vacuoles in skin fibroblasts.
Implications:
- The findings highlight the widespread cellular pathology in fetal I-cell disease.
- Understanding the nature of these inclusions aids in diagnosing and potentially managing this rare genetic disorder.