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Updated: Aug 14, 2026
09:46
Capturing Common Fragile Site Breaks by Native γH2A.X ChIP
Published on: January 24, 2025
Common fragile genes and digestive tract cancers
Tamotsu Kuroki1, Yoshitsugu Tajima, Jyunichiro Furui
1Department of Transplantation and Digestive Surgery, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
Surgery Today
|December 27, 2005
Summary
Common fragile sites like FRA3B and FRA16D are sensitive to carcinogens, leading to DNA damage. This damage can inactivate tumor suppressor genes, including the fragile histidine triad (FHIT) and WW domain-containing oxidoreductase (WWOX) genes, contributing to digestive tract cancers.
Area of Science:
- Genetics
- Oncology
Background:
- Common fragile sites (CFS) are genomic regions prone to breakage under replication stress.
- FRA3B and FRA16D are highly sensitive CFS loci in the human genome.
- The tumor suppressor genes fragile histidine triad (FHIT) and WW domain-containing oxidoreductase (WWOX) map to FRA3B and FRA16D, respectively.
Purpose of the Study:
- To provide an overview of the FHIT/FRA3B and WWOX/FRA16D loci in the context of digestive tract cancers.
- To highlight the similarities between FHIT and WWOX genes and their potential roles in cancer development.
Main Methods:
- Review of existing literature on FHIT, WWOX, common fragile sites, and digestive tract cancers.
- Analysis of gene characteristics, allelic loss regions, homozygous deletions, and aberrant transcripts.
Main Results:
- FHIT and WWOX genes share similarities, including large size, encompassing fragile sites, and frequent alterations in various cancers.
- Common fragile sites are sensitive to environmental carcinogens, causing DNA damage.
- This DNA damage can lead to the inactivation of FHIT and WWOX, contributing to cancer development.
Conclusions:
- FHIT/FRA3B and WWOX/FRA16D are critical tumor suppressor loci frequently altered in digestive tract cancers.
- Environmental exposures and resulting DNA damage at these fragile sites play a significant role in the pathogenesis of these cancers.
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