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Cell cycle and centromere FISH studies in premature centromere division
Alfredo Corona-Rivera1, Fabio Salamanca-Gomez, Lucina Bobadilla-Morales
1Instituto de Genética Humana Dr, Enrique Corona Rivera, Departamento de Fisiología, Centro Universitario Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco, México. alcorona@cucs.udg.mx
BMC Medical Genetics
|September 22, 2005
Summary
Premature centromere division (PCD) was observed in four family members, linked to cell cycle impairment and increased cell proliferation. Essential centromere integrity appears present in these individuals with PCD.
Area of Science:
- Cytogenetics
- Cell Biology
- Human Genetics
Background:
- Premature centromere division (PCD) presents in three categories, with the third characterized by high PCD frequency as the sole abnormality.
- This study focuses on a family exhibiting the third category of PCD, with no recognizable clinical pattern.
Purpose of the Study:
- To investigate premature centromere division (PCD) in a family exhibiting it as a sole chromosomal abnormality.
- To explore the relationship between PCD and cell cycle kinetics.
Main Methods:
- Analysis of mitotic configurations in lymphocyte cultures from affected and unaffected family members.
- Cell cycle duration assessment using differential sister chromatid stain analysis.
- Fluorescence in situ hybridization (FISH) studies of centromere DNA sequences.
Main Results:
- PCD was observed in four family members (propositus, father, two paternal aunts) in both treated and untreated cultures.
- Individuals with PCD showed significantly reduced cell cycle time (21.8 h) compared to controls (31.8 h).
- FISH studies confirmed the presence of specific centromeric DNA sequences in PCD cells.
Conclusions:
- Evidence suggests a functional relationship between premature centromere division (PCD) and cell cycle impairment.
- Essential centromere integrity is likely maintained in individuals with PCD.