We have located links that may give you full text access.
Age-Associated Methylation in Human Hemoglobin and Its Stability on Dried Blood Spots As Analyzed by Nanoflow Liquid Chromatography Tandem Mass Spectrometry.
Chemical Research in Toxicology 2018 November 3
Methylation of biomolecules is involved in many important biological processes. The contributing methylating agents arise from endogenous and exogenous sources (such as cigarette smoking). Human hemoglobin is easily accessible from blood and has been used as a molecular dosimeter for monitoring chemical exposure. We recently developed a method for characterization and quantification of the extents of methylation and ethylation in hemoglobin by nanoflow liquid chromatography tandem mass spectrometry under the selected reaction monitoring mode. Using this method, the relative extents of methylated and ethylated peptides in hemoglobin were quantified in nonsmoking subjects at various ages in this study. Among the nine methylation sites, we found that the extents of methylation were significantly higher in elderly subjects at the N-terminal and His-20 of α-globin, and at the N-terminal and Glu-26 of β-globin. Moreover, the extents of methylation at these sites were significantly correlated with the age of the subjects. On the other hand, no statistically significant difference was found in the ethylated peptides. We also examined the stability of methylated and ethylated hemoglobin when stored on dried blood spot cards. The extents of these modifications on hemoglobin are stable for at least 4 weeks stored at room temperature. Our results suggest that age should be considered as a factor when measuring hemoglobin methylation and that dried blood spot is a valuable biomonitoring technique for hemoglobin modifications in epidemiological studies.
Full text links
Related Resources
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app
All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.
By using this service, you agree to our terms of use and privacy policy.
Your Privacy Choices
You can now claim free CME credits for this literature searchClaim now
Get seemless 1-tap access through your institution/university
For the best experience, use the Read mobile app