Detection of an Abundant Plant-Based Small RNA in Healthy Consumers

The mechanisms of delivery of plant small RNAs to consumers must be investigated in order to harness this technology to positively impact biotechnology. Two groups have used honeysuckle (Lonicera japonica) feeding regimes to detect a plant-based small RNA, termed MIR2911, in sera. Meanwhile, numerou...

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Bibliographic Details
Published in:PloS one 2015-09, Vol.10 (9), p.e0137516-e0137516
Main Authors: Yang, Jian, Farmer, Lisa M, Agyekum, Abia A A, Elbaz-Younes, Ismail, Hirschi, Kendal D
Format: Article
Language:English
Subjects:
Abundance
Analysis
Animals
Argonaute 2 protein
Bioavailability
Biomarkers
Biotechnology
Children & youth
Consumers
Diet
Dietary intake
Feeding
Feeding regimes
Food matrix
Gastrointestinal Microbiome - physiology
Gene expression
Herbs
Intestines - metabolism
Lonicera
Lonicera japonica
Medicine
Mice
Microbiomes
MicroRNA
MicroRNAs
MicroRNAs - genetics
MicroRNAs - metabolism
Nutrition research
Permeability
Plant genetics
Proteins
Ribonucleic acid
RNA
RNA, Plant - genetics
RNA, Plant - metabolism
RNA-induced silencing complex
RNA-mediated interference
Serum levels
Stability
Studies
Urine
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Summary:The mechanisms of delivery of plant small RNAs to consumers must be investigated in order to harness this technology to positively impact biotechnology. Two groups have used honeysuckle (Lonicera japonica) feeding regimes to detect a plant-based small RNA, termed MIR2911, in sera. Meanwhile, numerous groups have failed to detect dietary plant-based small RNAs in consumers. Here we catalog levels of MIR2911 in different herbs, and suggest that in particular herb MIR2911 levels are elevated. Feeding these different herb-based diets to mice, we found MIR2911 levels in the sera and urine were associated with dietary intake levels. Abundance was not the sole determinate of apparent RNA bioavailability, as gavage-feeding large-doses of synthetic MIR2911 permitted only small transient increases in serum levels. Dietary MIR2911 were not modified in circulation by association with the host's RNA-induced silencing complex, as the RNA did not co-immunoprecipitate with AGO2. The stability of dietary MIR2911 in circulation differed from synthesized small RNAs, as tail vein administration of various synthetic plant-based small RNAs resulted in rapid clearance. However, synthetic MIR2911 appeared to be more stable than the other plant miRNAs tested. Notably, this uptake of dietary MIR2911 was not related to perturbations in the host's microbiome or gut permeability. We suggest dietary uptake of MIR2911 is commonplace in healthy consumers, and reproducible detection of plant-based small RNAs in consumers depends on dietary abundance, RNA stability and digestion from within the food-matrix.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0137516