Identification of 4-deoxythreonic acid present in human urine using HPLC and NMR techniques.

Abstract:

:The 1H NMR spectrum of urine exhibits a large number of detectable and quantifiable metabolites and hence urine metabolite profiling is potentially useful for the study of systems biology and the discovery of biomarkers for drug development or clinical applications. While a number of metabolites (50-100) are readily detectable in urine by NMR, a much larger number is potentially available if lower concentration species can be detected unambiguously. Lower concentration metabolites are thought to be more specific to certain disease states and thus it is important to detect these metabolites with certainty. We report the identification of 4-deoxythreonic acid, a relatively low concentration endogenous metabolite that has not been previously identified in the 1H NMR spectrum of human urine. The use of HPLC and NMR spectroscopy facilitated the unequivocal and non-invasive identification of the molecule in urine which is complicated by extensive peak overlap and multiple, similar resonances from other metabolites such as 3-hydroxybutanoic acid. High-resolution detection and good sensitivity were achieved by the combination of multiple chromatographic fraction collection, sample pre-concentration, and the use of a cryogenically cooled NMR probe.

journal_name

J Pharm Biomed Anal

authors

Appiah-Amponsah E,Shanaiah N,Nagana Gowda GA,Owusu-Sarfo K,Ye T,Raftery D

doi

10.1016/j.jpba.2009.06.007

subject

Has Abstract

pub_date

2009-12-05 00:00:00

pages

878-85

issue

5

eissn

0731-7085

issn

1873-264X

pii

S0731-7085(09)00362-8

journal_volume

50

pub_type

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