Arsenic Methylation and Skin Lesions
Author Information
Author(s): McCarty Kathleen M., Chen Yen-Ching, Quamruzzaman Quazi, Rahman Mahmuder, Mahiuddin Golam, Hsueh Yu-Mei, Su Li, Smith Thomas, Ryan Louise, Christiani David C.
Primary Institution: Yale University School of Medicine
Hypothesis
We investigated whether primary and secondary arsenic methylation ratios were associated with skin lesions and whether GSTT1, GSTP1, and GSTM1 polymorphisms modify these relationships.
Conclusion
Increasing primary methylation ratios are associated with an increase in risk of arsenic-related skin lesions.
Supporting Evidence
- A 10-fold increase in primary methylation ratio was associated with a 1.50-fold increased risk of skin lesions.
- Significant interaction was observed between GSTT1 wildtype and secondary methylation ratio.
- Cases had significantly higher total urinary arsenic concentrations than controls.
Takeaway
This study found that how our bodies process arsenic can affect the risk of skin problems, especially if we have certain genetic traits.
Methodology
A case-control study of 600 cases and 600 controls was conducted, with samples collected and analyzed for arsenic levels and genetic polymorphisms.
Potential Biases
Potential bias from categorizing multiple skin lesions into one outcome.
Limitations
The study could not distinguish and quantify trivalent methylated metabolites in urine, and there may be bias from grouping different types of skin lesions.
Participant Demographics
Participants were from Pabna, Bangladesh, aged 16 and older, with cases having skin lesions and controls being free of lesions.
Statistical Information
P-Value
0.01
Confidence Interval
1.00–2.26
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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