Related Experiment Videos
Prenatal diagnosis of type II glycogenosis (Pompe's disease) using microchemical analyses
Abstract:
1. In order to reduce the time interval between amniocentesis and prenatal diagnosis of Pompe's disease microchemical techniques were used for assay of acid alpha-1,4-glucosidase activities in cultured amniotic fluid cells. 2. Microtechniques used on homogenates of cultured amniotic fluid cells enabled the waiting period to be reduced to 2-3 weeks. 3. When dissected lyophilized groups of 200-300 cultured cells were analyzed, a prenatal diagnosis was possible at about 10 days after amniocentesis. 4. The acid alpha-1,4-glucosidase activity in the amniotic fluid supernatant is not informative in prenatal diagnosis of Pompe's disease. 5. Conditions of cell cultivation such as length of time in culture were found to influence markedly the acid alpha-1,4-glucosidase activity in cultured amniotic fluid cells. 6. For a reliable prenatal diagnosis of metabolic disorders primary cultures of control amniotic fluid cells should be used and the analytical results from the pregnancy at risk should be compared with primary cultures of control amniotic fluid cells and with those in cultured fibroblasts from heterozygous carriers, and an affected sibling from the particular family.
Insights
Microchemical techniques for Pompe disease diagnosis significantly shorten the waiting period. Analyzing cultured amniotic fluid cells allows prenatal diagnosis within 10 days, improving early detection for metabolic disorders.
Area of Science:
- Biochemistry
- Genetics
- Cell Biology
Background:
- Pompe disease is a rare metabolic disorder.
- Accurate and timely prenatal diagnosis is crucial for management.
- Current diagnostic methods can involve lengthy waiting times.
Purpose of the Study:
- To reduce the time interval between amniocentesis and prenatal diagnosis of Pompe disease.
- To establish reliable microchemical techniques for assaying acid alpha-1,4-glucosidase activity.
Main Methods:
- Utilized microchemical techniques for acid alpha-1,4-glucosidase activity assay.
- Analyzed cultured amniotic fluid cells and their homogenates.
- Examined dissected lyophilized cultured cells (200-300 cells).
Main Results:
- Microtechniques on cultured cell homogenates reduced the waiting period to 2-3 weeks.
- Analysis of dissected lyophilized cells enabled prenatal diagnosis in approximately 10 days.
- Acid alpha-1,4-glucosidase activity in amniotic fluid supernatant was not informative for diagnosis.
- Cell cultivation conditions, like culture duration, significantly impacted enzyme activity.
Conclusions:
- Microchemical analysis of cultured amniotic fluid cells offers a rapid prenatal diagnostic method for Pompe disease.
- Reliable diagnosis requires comparison with control amniotic fluid cells and carrier/affected sibling fibroblasts.
- Optimized cell cultivation and analytical methods are essential for accurate prenatal diagnosis of metabolic disorders.