Related Experiment Video
Updated: Aug 15, 2025

05:22
Author Spotlight: Characterizing DNA Replication of Pathogenic Repeats to Uncover Mechanisms of Replication Fork Stalling and Expansion
Published on: September 13, 2024
835
Summary
Repeat expansions, which are DNA sequence repetitions, were found near regulatory elements in seven different cancer types. These findings may offer new insights into cancer development and potential therapeutic targets.
Area of Science:
- Genomics
- Cancer Biology
- Molecular Oncology
Background:
- Repeat expansions are a class of genetic mutations.
- Regulatory elements control gene expression.
- Understanding their role in cancer is crucial.
Purpose of the Study:
- To investigate the occurrence of repeat expansions near regulatory elements.
- To determine if this phenomenon is present across multiple cancer types.
Main Methods:
- Bioinformatic analysis of genomic data.
- Identification of repeat expansion regions.
- Comparison across seven distinct cancer types.
Main Results:
- Recurrent repeat expansions were identified.
- These expansions were located near known regulatory elements.
- The findings were consistent across seven cancer types.
Conclusions:
- Repeat expansions near regulatory elements are a recurring feature in multiple cancers.
- This suggests a potential role in cancer pathogenesis.
- Further research is warranted to explore therapeutic implications.
More Related Videos
Related Concept Videos
Non-LTR Retrotransposons
11.7K
As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...
11.7K
Viral Recombination
23.7K
Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
23.7K
Gene Duplication and Divergence
6.2K
The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
6.2K
Genome Size and the Evolution of New Genes
8.1K
While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
8.1K
Multi-species Conserved Sequences
4.0K
Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale studies have provided new insights into the evolutionary relationship between organisms.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved...
4.0K
Exon Recombination
3.7K
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon...
Exon shuffling follows “splice frame rules.” Each exon...
3.7K

