Isolation of circulating microRNAs from microvesicles found in human plasma

Area of Science:

• Biochemistry
• Molecular Biology
• Oncology

Background:

• Circulating microRNAs (miRNAs) are remarkably stable in bodily fluids, resisting RNase degradation.
• This stability makes them valuable as diagnostic biomarkers and therapeutic targets for diseases like melanoma.
• miRNAs are protected from degradation by being encapsulated within membrane-bound microvesicles.

Purpose of the Study:

• To describe a convenient method for purifying microvesicles from biological fluids.
• To enable the identification of potential cancer-specific biomarkers using isolated microvesicles.

Main Methods:

• Utilized ExoQuick, a proprietary resin from Systems Biosciences, for microvesicle purification.
• Employed gentle conditions and readily available laboratory equipment for the isolation protocol.
• The method isolates all microvesicles, irrespective of their cellular origin.

Main Results:

• Demonstrated a convenient protocol for microvesicle isolation from serum and plasma.
• The method preserves the integrity of encapsulated miRNAs.
• Facilitates the discovery of novel cancer biomarkers.

Conclusions:

• ExoQuick provides an efficient and accessible method for microvesicle isolation.
• This technique supports the development of non-invasive diagnostic tools for cancer.
• Circulating microvesicles are a rich source for identifying cancer biomarkers.