Storage of Extracellular Vesicles in Human Milk, and MicroRNA Profiles in Human Milk Exosomes and Infant Formulas

Amy Leiferman, Jiang Shu, Bijaya Upadhyaya, Juan Cui, Janos Zempleni

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

ABSTRACTThe objectives of this study were to lay the methodological groundwork for field studies of microRNA analysis in exosomes from small sample volumes of human milk, and assess exosome and microRNA content in infant formulas. When human milk was stored at 4°C for 4 weeks, the count of exosome-sized vesicles decreased progressively to 49%±13% of that in fresh milk. Exosomes were purified from 1mL of fresh human milk and their microRNA content was assessed by microRNA-sequencing analysis and compared with that in infant formulas. We identified 221 microRNAs in exosomes from 3 samples of fresh human milk; 84 microRNAs were present in all 3 samples. MicroRNAs were not detectable in infant formulas and their exosome-sized vesicles, which appeared to be casein micelles. We conclude that large-scale studies of microRNAs in human milk exosomes are feasible, and exosomes and microRNAs are not detectable in formulas.

Original languageEnglish (US)
Pages (from-to)235-238
Number of pages4
JournalJournal of pediatric gastroenterology and nutrition
Volume69
Issue number2
DOIs
StatePublished - 2019

Keywords

  • casein
  • fat globules
  • protocols
  • stability

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Gastroenterology

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