Involvement of telomeric sequences in chromosomal aberrations

Area of Science:

• Genetics
• Molecular Biology
• Genomics

Background:

• Eukaryotic genomes exhibit structural and functional heterogeneity.
• Specific chromosomal regions are predisposed to aberrations.
• Folate-sensitive fragile sites and FRA16B are examples of structurally characterized fragile regions.

Purpose of the Study:

• To review the roles of telomeric DNA sequences and telomerase in chromosomal aberration formation.
• To explore the involvement of both terminal and interstitial telomeric sequences.
• To discuss the implications for genomic instability.

Main Methods:

• Literature review of cytological and molecular studies.
• Analysis of existing data on fragile sites and telomeric sequences.
• Synthesis of information on telomerase function and chromosomal aberrations.

Main Results:

• Telomeric sequences, both at chromosome ends and internally, can be involved in aberrations.
• Telomerase activity may influence the stability of these regions.
• Fragile sites and telomeric regions share common mechanisms in aberration formation.

Conclusions:

• Telomeric DNA and telomerase are significant factors in chromosomal aberration development.
• Understanding these roles is crucial for comprehending genomic instability.
• Further research is needed to fully elucidate the mechanisms involved.