We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Profiling of chiral and achiral carboxylic acid metabolomics: synthesis and evaluation of triazine-type chiral derivatization reagents for carboxylic acids by LC-ESI-MS/MS and the application to saliva of healthy volunteers and diabetic patients.
- Authors
Takayama, Takahiro; Kuwabara, Tomohiro; Maeda, Toshio; Noge, Ichiro; Kitagawa, Yutaka; Inoue, Koichi; Todoroki, Kenichiro; Min, Jun; Toyo'oka, Toshimasa
- Abstract
Novel triazine-type chiral derivatization reagents, i.e., ( S)-1-(4,6-dimethoxy-1,3,5-triazin-2-yl)pyrrolidin-3-amine (DMT-3( S)-Apy) and ( S)-4,6-dimethoxy- N-(pyrrolidin-3-yl)-1,3,5-triazin-2-amine (DMT-1( S)-Apy), were developed for the highly sensitive and selective detection of chiral carboxylic acids by UPLC-MS/MS analysis. Among the synthesized reagents, DMT-3( S)-Apy was a more efficient chiral reagent for the enantiomeric separation of chiral carboxylic acids in terms of separation efficiency by reversed-phase chromatography and detection sensitivity by ESI-MS/MS. The DMT-3( S)-Apy was used for the determination of 13 carboxylic acids in human saliva of healthy volunteers and diabetic patients. Various biological carboxylic acids including chiral carboxylic acids, and mono- and di-carboxylic acids were clearly identified in the saliva of healthy persons and diabetic patients. The concentrations of carboxylic acids detected in the saliva of diabetic patients were relatively higher than those in the healthy persons. Furthermore, the concentration of d-lactic acid (LA) and the ratio of d/ l-LA in the diabetic patients were significantly higher than those in the healthy persons. The low ratio of d/l-LA in healthy persons was also identified to be independent of age and sex. These results suggest that the determination of the d/ l-LA ratio in saliva might be applicable for the diagnosis of diabetes. Based on these observations, DMT-3( S)-Apy seems to be a useful chiral derivatization reagent for the determination not only of chiral carboxylic acids but also achiral ones. In conclusion, the proposed method using DMT-3( S)-Apy is useful for the carboxylic acid metabolomics study of various specimens. [Figure not available: see fulltext.]
- Subjects
TRIAZINES; CHIRAL drugs; CARBOXYLIC acids; RESOLUTION (Chemistry); SALIVA
- Publication
Analytical & Bioanalytical Chemistry, 2015, Vol 407, Issue 3, p1003
- ISSN
1618-2642
- Publication type
Article
- DOI
10.1007/s00216-014-8275-9