Human milk exosomes and their microRNAs survive digestion in vitro and are taken up by human intestinal cells

Yalin Liao, Xiaogu Du, Jie Li, Bo Lönnerdal

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Scope: Human milk exosomes provide a natural means of genetic material transfer to infants; however, the effect of gastric/pancreatic digestion milk exosomes stability and their microRNA content is largely unknown. Methods and results: We took a simulated gastric/pancreatic digestion protocol to perform in vitro digestion of milk exosomes, explore intestinal epithelial uptake, and further elucidate microRNA responses to digestion at early-, mid-, late lactation by massive parallel sequencing. Both undigested and digested exosomes enter human intestinal crypt-like cells (HIEC), with evidence of nuclear localization. We identified 288 mature microRNAs from all 24 exosome samples, and an additional 610 at low abundance. A large number of synapse development- and immune-related microRNAs were identified. hsa-miR-22-3p was the most abundant microRNA, and the top 15 microRNAs contributed ∼11% of the sequencing reads. Upon digestion, the overall microRNA abundance in human milk exosomes was stable. Conclusion: Our results for the first time reveal the survivability and complexity of human milk exosome microRNAs upon simulated gastric/pancreatic digestion, and the dynamics during lactation stages. The results suggest a previously underexplored area of infant response to genetic material in human milk exosomes.

Original languageEnglish (US)
Article number1700082
JournalMolecular Nutrition and Food Research
Volume61
Issue number11
DOIs
StatePublished - Nov 1 2017

Fingerprint

exosomes
Exosomes
in vitro digestion
Human Milk
breast milk
MicroRNAs
microRNA
Digestion
digestion
cells
Stomach
stomach
Lactation
Milk
intestinal crypts
milk
In Vitro Techniques
late lactation
lactation stage
synapse

Keywords

  • Exosome
  • Human milk
  • In vitro digestion
  • Intestine
  • MicroRNA

ASJC Scopus subject areas

  • Biotechnology
  • Food Science

Cite this

Human milk exosomes and their microRNAs survive digestion in vitro and are taken up by human intestinal cells. / Liao, Yalin; Du, Xiaogu; Li, Jie; Lönnerdal, Bo.

In: Molecular Nutrition and Food Research, Vol. 61, No. 11, 1700082, 01.11.2017.

Research output: Contribution to journalArticle

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