Principal component analysis of urine metabolites detected by NMR and DESI-MS in patients with inborn errors of metabolism

Authors: Pan, Zhengzheng; Gu, Haiwei; Talaty, Nari; Chen, Huanwen; Shanaiah, Narasimhamurthy; Hainline, Bryan; Cooks, R.¹; Raftery, Daniel²

Source: Analytical and Bioanalytical Chemistry, Volume 387, Number 2, January 2007 , pp. 539-549(11)

Publisher: Springer

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Abstract:

Urine metabolic profiles of patients with inborn errors of metabolism were examined with nuclear magnetic resonance (NMR) and desorption electrospray ionization mass spectrometry (DESI-MS) methods. Spectra obtained from the study of urine samples from individual patients with argininosuccinic aciduria (ASA), classic homocystinuria (HCY), classic methylmalonic acidemia (MMA), maple syrup urine disease (MSUD), phenylketonuria (PKU) and type II tyrosinemia (TYRO) were compared with six control patient urine samples using principal component analysis (PCA). Target molecule spectra were identified from the loading plots of PCA output and compared with known metabolic profiles from the literature and metabolite databases. Results obtained from the two techniques were then correlated to obtain a common list of molecules associated with the different diseases and metabolic pathways. The combined approach discussed here may prove useful in the rapid screening of biological fluids from sick patients and may help to improve the understanding of these rare diseases.

Keywords: Nuclear magnetic resonance (NMR); Desorption electrospray ionization (DESI); Mass spectrometry; Metabolomics; Inborn errors of metabolism; Principal component analysis (PCA)

Document Type: Research article

DOI: http://dx.doi.org/10.1007/s00216-006-0546-7

Affiliations: 1: Email: cooks@purdue.edu 2: Email: raftery@purdue.edu

Publication date: 2007-01-01