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DNA secondary structure at chromosomal fragile sites in human disease
Ryan G Thys1, Christine E Lehman1, Levi C T Pierce2
1Department of Cancer Biology, Wake Forest School of Medicine, Winston-Salem, North Carolina 27157, USA.
Abstract:
DNA has the ability to form a variety of secondary structures that can interfere with normal cellular processes, and many of these structures have been associated with neurological diseases and cancer. Secondary structure-forming sequences are often found at chromosomal fragile sites, which are hotspots for sister chromatid exchange, chromosomal translocations, and deletions. Structures formed at fragile sites can lead to instability by disrupting normal cellular processes such as DNA replication and transcription. The instability caused by disruption of replication and transcription can lead to DNA breakage, resulting in gene rearrangements and deletions that cause disease. In this review, we discuss the role of DNA secondary structure at fragile sites in human disease.
Insights
DNA secondary structures at fragile sites can disrupt cellular processes, leading to genomic instability and diseases like cancer and neurological disorders. Understanding these structures is key to disease prevention.
Area of Science:
- Genetics
- Molecular Biology
- Genomic Instability
Background:
- DNA can form non-canonical secondary structures.
- These structures are implicated in various human diseases, including cancer and neurological disorders.
- Such sequences are frequently located at chromosomal fragile sites.
Purpose of the Study:
- To review the role of DNA secondary structures at fragile sites in human disease.
- To highlight the association between fragile sites, DNA secondary structures, and disease pathogenesis.
Main Methods:
- Review of existing literature on DNA secondary structures.
- Analysis of the role of fragile sites in genomic instability.
- Connecting DNA secondary structure formation at fragile sites to disease mechanisms.
Main Results:
- DNA secondary structures form at chromosomal fragile sites.
- These structures interfere with DNA replication and transcription.
- Disruption of these processes leads to DNA breakage and gene rearrangements.
Conclusions:
- DNA secondary structures at fragile sites are critical contributors to genomic instability.
- This instability drives the development of various human diseases.
- Targeting these structures may offer therapeutic strategies for associated diseases.
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