Open AccessStorage at −80°C Preserves the Antioxidant Capacity of Preterm Human Milk
Author(s) -
Akdag Arzu,
Nur Sari Fatma,
Dizdar Evrim Alyamac,
Uras Nurdan,
Isikoglu Semra,
Erel Ozcan,
Dilmen Ugur
Publication year - 2014
Publication title -
journal of clinical laboratory analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 50
eISSN - 1098-2825
pISSN - 0887-8013
DOI - 10.1002/jcla.21703
Subject(s) - colostrum , antioxidant capacity , oxidative stress , food science , chemistry , breast milk , antioxidant , zoology , medicine , biology , biochemistry , immunology , antibody
Background and Objective It is essential to establish optimum parameters for maintaining the quality of stored milk until the moment of consumption with minimal deterioration of its properties. The aim of the study was to evaluate total antioxidant capacity (TAC) and total oxidation status (TOS) of fresh and freeze‐stored samples (at −80°C) of preterm human milk (HM). Methods Samples of colostrum were collected from 98 healthy women within the first 4 days after delivery. The total milk volume collected (6 ml) was divided in two aliquot parts: 3 ml for the fresh analysis which was done immediately after the extraction and 3 ml for storage under freezing conditions at −80°C for three months. The antioxidant status and oxidative stress of the fresh and stored breast milk were assessed via determination of TAC and TOS levels. Results The mean gestational age and the birth weight of the infants were 31.26 ± 2.93 weeks and 1620 ± 581.91 g; respectively. There were no significant correlations between maternal age, route of delivery and milk oxidative stress. There was no significant difference between the levels of TAC, TOS and the oxidative stress index in fresh and freeze‐stored samples of colostrum in preterm HM ( p > 0.05). Conclusion Freeze storage of preterm HM at −80°C for three months preserves the antioxidant capacity without changing oxidative status of HM, which could be noteworthy for the preterm infant nutrition.