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Complex chromosome rearrangement with ankyloblepharon filiforme adnatum
B G Kousseff1, P Papenhausen, Y P Essig
1Division of Medical Genetics, University of South Florida, Tampa, 33612-4799.
Journal of Medical Genetics
|February 1, 1993
Summary
Complex chromosome rearrangements, even with six breaks, can allow survival and birth. However, these genetic conditions often lead to significant health issues and developmental challenges.
Area of Science:
- Genetics
- Human Biology
- Medical Science
Background:
- Complex chromosome rearrangements (CCRs) are rare genetic alterations.
- CCRs involving multiple breaks can arise de novo, impacting embryonic development.
Observation:
- A case study of a Caucasian boy with a de novo CCR involving six chromosome breaks.
- The patient presented with intrauterine growth restriction, microcephaly, congenital heart defect, hypotonia, and dysmorphic features.
Findings:
- The CCR included two translocations (t(15;21) and t(3;11)), a pericentric inversion on chromosome 3, and an interstitial deletion on chromosome 3.
- Paternal gamete was identified as the source of the rearrangement, with no evidence of mitotic instability.
- A literature review of 36 patients with CCRs (≥4 breaks) suggests CCRs are compatible with survival to birth.
Implications:
- CCRs are compatible with gamete formation, zygote development, and postnatal life.
- Postnatal life is often characterized by structural defects, growth retardation, and intellectual disability.
- Further research into CCRs is crucial for understanding their long-term effects and potential management strategies.