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Increasing fish consumption does not affect genotoxicity markers in the colon in an intervention study
Gerda K Pot1, Nina Habermann, Gosia Majsak-Newman
1Division of Human Nutrition, Wageningen University, Bomenweg 2, 6703 HD Wageningen, The Netherlands.
Carcinogenesis
|October 29, 2009
Summary
Increasing fish consumption, whether oily salmon or lean cod, did not alter key genotoxicity markers in the colon. This randomized controlled trial found no significant changes in fecal water genotoxicity or colonocyte DNA damage in participants consuming fish compared to dietary advice alone.
Area of Science:
- Nutrition and Cancer Research
- Molecular Epidemiology
- Gastroenterology
Background:
- Observational studies link fish consumption to reduced colorectal cancer (CRC) risk.
- Potential mechanisms include decreased colonic genotoxicity.
- Concerns exist regarding toxic compounds in fish potentially increasing genotoxicity.
Purpose of the Study:
- To investigate the effects of consuming oil-rich (salmon) or lean (cod) fish on colon genotoxicity markers.
- To compare these effects against a control group receiving dietary advice (DA).
Main Methods:
- Randomized controlled parallel intervention study over 6 months.
- Participants allocated to salmon, cod, or DA groups.
- Comet Assay used to measure fecal water genotoxicity and colonocyte DNA damage (tail intensity).
Main Results:
- No significant changes in fecal water genotoxicity observed in salmon or cod groups compared to DA.
- No significant changes in colonocyte DNA damage detected in either fish consumption group versus DA.
- Fecal water genotoxicity and colonocyte DNA damage measurements did not correlate.
Conclusions:
- Increased consumption of either oil-rich or lean fish does not impact key genotoxicity markers in the colon.
- The study did not support the hypothesis that fish consumption reduces colonic genotoxicity.
- Further research may be needed to explore other mechanisms or different fish types.
