ArticleInternational breastfeeding journal2024
New latex agglutination assay for the determination of lactoferrin in human milk.
Article in International breastfeeding journal, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 1 paper.
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1 citing paper in PubMed.
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Corrections and comments
- Erratum issued
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3 authors.
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No grant is acknowledged in the PubMed record.
Abstract
backgroundLactoferrin (LF) in human milk has various biological properties and contributes to the prevention of preterm birth complications. Enzyme-linked immunosorbent assay (ELISA) is one of the most commonly used methods to measure LF in human milk, but this method is time-consuming and laborious. In Japanese human milk banks, the concentration of LF in donor human milk (DHM) is measured routinely. Here, we reported a rapid, simple, and accurate method for determining LF in human milk using a new reagent based on a latex agglutination assay.
methodsWe obtained 208 human milk pools from 148 mothers, and samples were collected before and after Holder pasteurization. Milk samples were diluted 100- or 200-fold and LF concentrations were measured by a latex agglutination assay using an automated analyzer. The reagent was validated in terms of repeatability, linearity, detection limit, recovery, and comparison with ELISA.
resultsThe coefficient of variation (CV) for intra-assay precision ranged from 0.6 to 5.0% in human milk with high, medium, and low LF concentrations. The linearity was also tested by serial sample dilution and was confirmed up to 16 µg/mL with a detection limit of 0.2 µg/mL. The recovery rates in a spiked recovery test were ranged from 90 to 120% at high, medium, and low concentrations of LF. Furthermore, a strong correlation was observed between LF levels determined by the latex agglutination assay and ELISA (r = 0.978, p < 0.001, n = 255). The regression equation was y = 0.991x + 0.545 (r
conclusionsThe latex agglutination assay used to determine LF in human milk is rapid, simple, and accurate enough to be used routinely. Its use may contribute to the quick and easy provision of appropriate DHM to preterm infants.
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