Plasma/Serum Circulating and Exosomal RNA Purification Mini Kit (Slurry Format)Norgen's Plasma/Serum Circulating and Exosomal RNA Purification Mini Kit (Slurry Format) provides a fast, reliable and simple procedure for isolating circulating and exosomal RNA from plasma and serum samples ranging from 0.25 mL to 2 mL.  Norgen's Plasma/Serum Circulating and Exosomal RNA Purification 96-Well Kit (Slurry Format) provides a high throughput method for isolating circulating and exosomal RNA from plasma and serum samples using either a vacuum manifold or centrifugation.  These kits are able to isolate all sizes of circulating RNA and exosomal RNA, including microRNA, without the use of phenol or chloroform. The slurry format provides an advantage over other available kits in that it does not require extension tubes for the purification of free-circulating and exosomal RNA from large sample volumes. RNA can be isolated from either fresh or frozen samples using these kits. These kits are suitable for the isolation of RNA from serum or plasma prepared from blood collected only on either EDTA or citrate. Plasma samples prepared from blood collected on heparin should not be used as heparin can significantly interfere with many downstream applications including RT-PCR.The purified plasma/serum free-circulating and exosomal RNA is eluted in an elution solution that is compatible with PCR, qPCR, methylation-sensitive reverse transcription qPCR, reverse transcription PCR, Northern blotting, RNase protection and primer extension, expression array assays, and NGS.Free-circulating and exosomal plasma and serum RNA can serve as both tumor- and fetal-specific markers for cancer detection and prenatal diagnosis. As well, free-circulating and exosomal RNAs have the potential to provide biomarkers for other disease states. Free-circulating and exosomal RNA in plasma or serum are usually present as short fragments of less than 1000nt, and free-circulating miRNA (21nt) can also be found in plasma and serum.  Figure 1. Isolation and Detection of Circulating RNA from Different Plasma Volumes. Norgen's Plasma/Serum Circulating RNA Purification Mini Kit (Slurry Format) was used to isolate circulating RNA from 0.5mL, 1mL and 2mL plasma. Three microlitres of the purified RNA was then used as the template in RT-qPCR reactions to detect the human 5S gene. The 5S housekeeping gene was detected from all plasma sample volumes used. The amplification of the 5S rRNA showed an increasing amount of RNA with increasing the sample input volume. This is represented by the decrease of the Ct value with increasing the sample input volume. RNA isolated from 0.5mL plasma is represented by the Red line, RNA isolated from 1mL plasma is represented by the Green line whereas RNA isolated from 2mL plasma is represented by the Blue line. The black line corresponds to the no template control.]">Plasma/Serum Circulating and Exosomal RNA Purification Mini Kit (Slurry Format) Figure 1Figure 2. Effective Isolation of Plasma Circulating RNA from Different Volumes. Norgen's Plasma/Serum Circulating RNA Purification Mini Kit (Slurry Format) was used to isolate circulating RNA from 0.5mL, 1mL and 2mL plasma. Three microlitres of the purified RNA was then used as the template in RT-qPCR reactions to detect the human 5S gene. The 5S housekeeping gene was detected from all plasma sample volumes used. The amplification of the 5S rRNA showed an increasing amount of RNA with increasing the sample input volume. This is represented by the decrease of the Ct value with increasing the sample input volume. Average Ct. values for the amplification of the 5S rRNA isolated from 0.5mL plasma is represented by the Red bar, Average Ct. values for the amplification of the 5S rRNA isolated from 1mL plasma is represented by the Green bar whereas Average Ct. values for the amplification of the 5S rRNA isolated from 2mL plasma is represented by the blue bar.]">Plasma/Serum Circulating and Exosomal RNA Purification Mini Kit (Slurry Format) Figure 2Figure 3.Effective and Consistent Detection of Plasma Exosome RNA.Norgen'sPlasma/Serum Circulating and Exosomal RNA Isolation Kits can effectively isolate RNA from plasma. Plasma Exosome RNA was isolated from 500 µL of human plasma prepared from blood collected on citrate, EDTA or Heparin in triplicates using Norgen's Plasma/Serum RNA Isolation Kit (blue), a ExoQuick Exosome Precipitation Reagent (green) and Qiagens QIAzol extraction followed by a modified Qiagen's RNeasy Mini Kit cleanup (red). Stem loop RT-qPCR using primers specific to miR-21 and miR-16 as well as the housekeeping 5S rRNA was performed. In brief, three microliters of the 100 µL isolated RNA was then subjected to a 20 µL reverse transcription using 5S rRNA, miR-21 and miR-16 stem-loop reverse primer or reveres primer. Three microliters of the reverse transcription was used in a 20 µL real-time PCR reaction with primers to detect the human miR-21, human miR-16 and the 5S rRNA. Norgen's Plasma/Serum Exosome RNA Isolation Kit is the only product that showed consistent detection of all tested transcripts with the highest quality regardless the type of the anti-coagulant used for blood collection.]">Plasma/Serum Circulating and Exosomal RNA Purification Mini Kit (Slurry Format) Figure 3