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Open AccessArticle

Validation and Application of Biocrates AbsoluteIDQ® p180 Targeted Metabolomics Kit Using Human Milk

1
USDA/ARS Western Human Nutrition Research Center, 430 West Health Sciences Drive, Davis, CA 95616, USA
2
Department of Nutrition, University of California, One Shields Ave, Davis, CA 95616, USA
3
Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, 68 Shaheed Tajuddin Ahmed Sarani, Mohakhali, Dhaka 1212, Bangladesh
*
Author to whom correspondence should be addressed.
Nutrients 2019, 11(8), 1733; https://doi.org/10.3390/nu11081733
Received: 22 June 2019 / Revised: 15 July 2019 / Accepted: 17 July 2019 / Published: 26 July 2019
(This article belongs to the Special Issue Human Milk and Lactation)
Human-milk-targeted metabolomics analysis offers novel insights into milk composition and relationships with maternal and infant phenotypes and nutritional status. The Biocrates AbsoluteIDQ® p180 kit, targeting 40 acylcarnitines, 42 amino acids/biogenic amines, 91 phospholipids, 15 sphingolipids, and sum of hexoses, was evaluated for human milk using the AB Sciex 5500 QTRAP mass-spectrometer in liquid chromatography-tandem mass-spectrometry (LC-MS/MS) and flow-injection analysis (FIA) mode. Milk (<6 months lactation) from (A) Bangladeshi apparently healthy mothers (body mass index (BMI) > 18.5; n = 12) and (B) Bangladeshi mothers of stunted infants (height-for-age Z (HAZ)-score <−2; n = 13) was analyzed. Overall, 123 of the possible 188 metabolites were detected in milk. New internal standards and adjusted calibrator levels were used for improved precision and concentration ranges for milk metabolites. Recoveries ranged between 43% and 120% (coefficient of variation (CV): 2.4%–24.1%, 6 replicates). Milk consumed by stunted infants vs. that from mothers with BMI > 18.5 was lower in 6 amino acids/biogenic amines but higher in isovalerylcarnitine, two phospholipids, and one sphingomyelin (p < 0.05 for all). Associations between milk metabolites differed between groups. The AbsoluteIDQ® p180 kit is a rapid analysis tool suitable for human milk analysis and reduces analytical bias by allowing the same technique for different specimens. More research is needed to examine milk metabolite relationships with maternal and infant phenotypes. View Full-Text
Keywords: human milk; targeted metabolomics; amino acids; lipid metabolites; LC-MS; flow injection analysis human milk; targeted metabolomics; amino acids; lipid metabolites; LC-MS; flow injection analysis
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Hampel, D.; Shahab-Ferdows, S.; Hossain, M.; Islam, M.M.; Ahmed, T.; Allen, L.H. Validation and Application of Biocrates AbsoluteIDQ® p180 Targeted Metabolomics Kit Using Human Milk. Nutrients 2019, 11, 1733.

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