Publications

Publications

Comparing efficiency of micro-RNA and mRNA biomarker liberation with microbubble-enhanced ultrasound exposure.

By:
Contributors: Robert Paproski, PhD
Ultrasound Med Biol. 2014 Sep;40(9):2207-16. doi: 10.1016/j.ultrasmedbio.2014.05.005. Epub 2014 Jul 9.

Abstract

Blood biomarkers are potentially powerful diagnostic tools that are limited clinically by low concentrations, the inability to determine biomarker origin and unknown patient baseline. Recently, ultrasound has been shown to liberate proteins and large mRNA biomarkers, overcoming many of these limitations. We have since demonstrated that adding lipid-stabilized microbubbles elevates mRNA concentration an order of magnitude compared with ultrasound without microbubbles, in vitro. Unfortunately the large size of some mRNA molecules may limit efficiency of release and hinder efficacy as an ultrasound-liberated biomarker. We hypothesize that smaller molecules will be released more efficiently with ultrasound than larger molecules. Although investigation of large libraries of biomarkers should be performed to fully validate this hypothesis, we focus on a small subset of mRNA and micro-RNAs. Specifically, we focus on miR-21 (22 base pairs [bp]), which is upregulated in certain forms of cancer, compared with previously investigated mammaglobin mRNA (502 bp). We also report release of micro-RNA miR-155 (22 bp) and housekeeping rRNA S18 (1869 bp). More than 10 million additional miR-21 copies per 100,000 cells are released with ultrasound-microbubble exposure. The low- molecular-weight miR-21 proved to be liberated 50 times more efficiently than high-molecular-weight mammaglobin mRNA, releasing orders of magnitude more miR-21 than mammaglobin mRNA under comparable conditions.

 PubMed

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Enbridge Ride to Conquer Cancer 2018

APCaRI members participated in the Enbridge Ride to Conquer Cancer, benefiting the Alberta Cancer Foundation, again this year! The ride is a 2-day cycling adventure that covers 200 km along the majestic Rockies. Unfortunately,  the air was so smoky from fires that the air quality health index reached 10+.  The 1800 riders rode approximately 75 km, but had to stop due to potential negative health risks from the smoke.
Although the ride was shortened it was still an amazing experience for the APCaRI member-riders and the Cross Cancer riding team. Thank you again to the amazing team of volunteers that helped to organize, set-up and transport riders to Calgary!
Most importantly, over $8 M dollars was raised to support cutting-edge cancer research in Alberta! We are very thankful for the support we received, which will help us to beat prostate cancer.
If you didn’t get a chance to support one of our riders, please consider contributing to the team’s efforts at our DONATE page

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