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

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

2 Zitate (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
OriginalspracheEnglisch
Aufsatznummere59573
Seiten (von - bis)1-13
FachzeitschriftJournal of Visualized Experiments
Jahrgang2019
Ausgabenummer147
DOIs
PublikationsstatusVeröffentlicht - Mai 2019

Schlagwörter

  • Lipoprotein particles
  • micro-RNA
  • HDL
  • LDL
  • qPCR
  • absolute content
  • cq value
  • transfer rate
  • cellular uptake

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