Enrichment of Native Lipoprotein Particles with microRNA and Subsequent Determination of Their Absolute/Relative microRNA Content and Their Cellular Transfer Rate

Birgit Plochberger, Herbert Stangl, Andreas Karner, Markus Axmann, Sabine M. Meier

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Lipoprotein particles are predominately transporters of lipids and cholesterol in the bloodstream. Furthermore, they contain small amounts of strands of noncoding microRNA (miRNA). In general, miRNA alters the protein expression profile due to interactions with messenger-RNA (mRNA). Thus, knowledge of the relative and absolute miRNA content of lipoprotein particles is essential to estimate the biological effect of cellular particle uptake. Here, a quantitative real-time polymerase chain reaction (qPCR)-based protocol is presented to determine the absolute miRNA content of lipoprotein particles—exemplified shown for native and miRNA-enriched lipoprotein particles. The relative miRNA content is quantified using multiwell microfluidic array cards. Furthermore, this protocol allows scientists to estimate the cellular miRNA and, thus, the lipoprotein particle uptake rate. A significant increase of the cellular miRNA level is observable when using high-density lipoprotein (HDL) particles artificially loaded with miRNA, whereas incubation with native HDL particles yields no significant effect due to their rather low miRNA content. In contrast, the cellular uptake of low-density lipoprotein (LDL) particles—neither with native miRNA nor artificially loaded with it—did not alter the cellular miRNA level
Original languageEnglish
Article numbere59573
Pages (from-to)1-13
JournalJournal of Visualized Experiments
Volume2019
Issue number147
DOIs
Publication statusPublished - May 2019

Keywords

  • Lipoprotein particles
  • micro-RNA
  • HDL
  • LDL
  • qPCR
  • absolute content
  • cq value
  • transfer rate
  • cellular uptake
  • Absolute content
  • Micro-RNA
  • Cq value
  • Biochemistry
  • Transfer rate
  • Issue 147
  • Cellular uptake

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