Related Experiment Videos
Medullary thyroid carcinoma: Australian experience with genetic testing.
J L Ward1, V J Hyland, D S Andrew
1Molecular Genetics Unit, Kolling Institute of Medical Research, Royal North Shore Hospital, St. Leonards, NSW, Australia.
Henry Ford Hospital Medical Journal
|January 1, 1992
Summary
Genetic linkage analysis using chromosome 10 probes identified carrier status for multiple endocrine neoplasia type 2A (MEN 2A) and familial medullary thyroid carcinoma (MTC) in individuals. This genetic testing offers crucial insights beyond traditional diagnostic methods.
Area of Science:
- Genetics
- Endocrinology
- Oncology
Background:
- Multiple Endocrine Neoplasia type 2A (MEN 2A) and familial Medullary Thyroid Carcinoma (MTC) are inherited endocrine disorders.
- Accurate carrier status identification is crucial for early diagnosis and management.
Purpose of the Study:
- To perform linkage analysis in MEN 2A/MTC pedigrees using pericentromeric chromosome 10 probes.
- To identify individuals with carrier status for these genetic conditions.
- To investigate potential DNA rearrangements in affected individuals.
Main Methods:
- Linkage analysis utilizing pericentromeric chromosome 10 probes.
- Pulsed Field Gel Electrophoresis (PFGE) to link specific DNA probes (H4.IRBP, pMCK2) to a 150 kb fragment.
- cDNA library generation from metastatic MTC tissue for gene screening.
Main Results:
- Carrier status was determined for 10 individuals, many missed by pentagastrin stimulation testing.
- PFGE analysis revealed no major DNA rearrangements in MEN 2A and MEN 2B patients compared to controls.
- A cDNA library was created for identifying candidate genes associated with MEN 2A and MEN 2B.
Conclusions:
- Linkage analysis with chromosome 10 probes is effective for identifying MEN 2A/MTC carriers.
- Genetic testing provides a valuable diagnostic tool, complementing existing clinical tests.
- Further research using the generated cDNA library is needed to identify causative genes for MEN 2A and MEN 2B.