Overview

• Versatile plasma/serum input ranges
• No phenol extractions
• Fast and easy processing of samples for the purification and the isolation of RNA.
• No time-consuming ultracentrifugation.
• More effective than any other method.
• EXTRAClean resin separation matrix provides highly purified RNA

These kits provide a fast, reliable and convenient method to purify and concentrate high quality, high purity and inhibitor-free cell-free circulating and exosomal RNA using a convenient spin column method. These kits can purify RNA from fresh or frozen serum or plasma samples prepared from blood collected 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 such as RT-PCR. The purified plasma/serum RNA is fully compatible with all downstream applications including PCR, qPCR, methylation-sensitive reverse transcription qPCR, reverse transcription PCR, Northern blotting, RNase protection and primer extension, expression array assays, and NGS. The EXTRAClean columns undergo stringent processing and rigorous quality control measures to minimize contamination traces, ensuring optimal results for sensitive applications such as NGS.

Background

Cell-free circulating RNA, including exosomal RNA in plasma or serum, has the potential to provide biomarkers for certain cancers and disease states, and includes tumor-specific extracellular RNA in the blood. Exosomes are 40 – 100 nm membrane vesicles, which are secreted by most cell types. Exosomes can be found in saliva, blood, urine, amniotic fluid and malignant ascitic fluids, among other biological fluids. Evidence has been accumulating recently that these vesicles act as cellular messengers, conveying information to distant cells and tissues within the body. The exosomes contain cell-specific proteins, lipids and RNAs, which are transported to other cells, where they can alter function and/or physiology. These exosomes may play a functional role in mediating adaptive immune responses to infectious agents and tumours, tissue repair, neural communication and transfer of pathogenic proteins. Recent work has demonstrated the presence of distinct subsets of microRNAs within exosomes which depend upon the tumour cell type from which they are secreted. For this reason, exosomal RNAs may serve as biomarkers for various diseases including cancer. As the RNA molecules encapsulated within exosomes are protected from degradation by RNAses, they can be efficiently recovered from biological fluids, such as plasma or serum.

EXTRAClean Plasma/Serum RNA Purification Mini Kit

This kit can purify RNA from fresh or frozen serum or plasma samples prepared from blood collected on either EDTA or Citrate, from volumes ranging from 50 μL to 200 μL. The purified plasma/serum RNA is eluted in a flexible final volume of 10 μL to 25 μL.

EXTRAClean Plasma/Serum RNA Purification Midi Kit

This utilizes a two-column method, and can purify RNA from fresh or frozen serum or plasma samples prepared from blood collected on either EDTA or Citrate, from volumes ranging from 250 μL to 1.5 mL. The first column will handle the large volume input of bodily fluids that is followed by a concentration on a mini column for a final elution of 50 μL to 100 μL.

EXTRAClean Plasma/Serum RNA Purification Maxi Kit

This kit can purify RNA from fresh or frozen serum or plasma samples prepared from blood collected on either EDTA or Citrate, from volumes ranging from 2 mL to 5 mL. The first column will handle the large volume input of bodily fluids that is followed by a concentration on a mini column for a final elution of 50 μL to 100 μL.

Details

Supporting Data

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Kit Specifications
Sample Type	Plasma/Serum
Anti-Coagulant (for Plasma)†	EDTA or Citrate
Sample Volume Range	50 to 200 μL
Minimum Elution Volume	10 μL
Maximum Elution Volume	25 μL
Time to Complete 10 Purifications	15 – 20 minutes
Size of RNA Purified	All sizes, including miRNA and small RNA (<200 nt)
Average Yields¥	Variable depending on specimen

† This kit is suitable for the isolation of RNA from fresh or frozen serum or plasma prepared from blood collected 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 such as RT-PCR

¥ Please check page 5 for Average Plasma/Serum Yields and Common RNA Quantification Methods

Storage Conditions and Product Stability
All solutions should be kept tightly sealed and stored at room temperature. This kit is stable for 2 years after the date of shipment. It is recommended to warm Lysis Buffer A for 20 minutes at 60°C if any salt precipitation is observed.

Component	Cat. 73700 (50 preps)	Cat. 73710 (20 preps)	Cat. 73720 (10 preps)
Lysis Buffer A	2 x 20 mL	100 mL	1 x 130 mL 1 x 30 mL
Wash Solution A	18 mL*	1 x 38 mL* 1 x 18 mL*	38 mL*
Elution Solution A	6 mL	6 mL	6 mL
Elution Buffer F	–	–	15 mL
EXTRACLean Micro Spin Columns	50	–	–
EXTRACLean Mini Spin Columns	–	20	10
EXTRACLean Midi Spin Columns	–	20	–
EXTRACLean Maxi Spin Columns	–	–	10
Collection Tubes	–	20	10
Elution Tubes (1.7 mL)	50	20	10
Product Insert	1	1	1