
2
Introduction
The Mag-Bind® FFPE RNA 96 kit provide a rapid and easy method for the isolation of
total RNA from formalin-xed, paran-embedded (FFPE) tissue sections. Due to xation
and embedding procedures, nucleic acids in FFPE samples are heavily fragmented and
modied by formaldehyde. While the Mag-Bind® FFPE RNA 96 kit are optimized to
minimize the eect of the formaldehyde modication, it is not recommended to use the
RNA puried with this kit for downstream applications that requires full length RNA.
Principle
The Mag-Bind® FFPE RNA 96 kit combine high ecient binding properties of Mag-Bind®
technology with a specially designed buer system to isolate total RNA sample from
FFPE sample. There are two protocols included in this manual. The standard protocol
uses a heating step instead of xylene to remove paran from the sample. The alternative
protocol uses traditional xylene extraction to remove paran.
Samples are rst lysed in RML Buer with digestion of Proteinase K. The lysate is then
mixed with MFB Buer and magnetic particles to bind the nucleic acid on the surface of
the Mag-Bind® Particles SC. Genomic DNA is removed by DNase I digestion. After two
wash steps, puried RNA is eluted with RNase-free water.
Starting Materials
Since standard formalin xation and paran embedding procedures cause signicant
fragmentation of nucleic acids. We recommend following guidelines to limit the extent
of DNA/RNA fragmentation: 1) Use 4-10% formalin to xate tissue samples; 2) Limit
the xation time to 14-24 hours; 3) Completely dehydrate samples before embedding.
Always use freshly cut sections of FFPE tissue for RNA isolation. For the rst time user, we
recommend to use less than 3-5 sections with thickness of 10 μm. Depending on the yield
and purity obtained, it may be possible to increase the starting material.
New in this Edition:
March 2018
• The storage temperature for DNase I Digestion Buer has changed. DNase I Digestion
Buer should now be stored at -20°C along with the Mag-Bind® DNase I.
• The 200 prep size of M2551, Mag-Bind® FFPE RNA 96 Kit, has been discontinued and
is no longer available to purchase.
• M2555, Mag-Bind® FFPE RNA Kit, has been discontinued and is no longer available to
purchase.
January 2014
• DNase I has been renamed Mag-Bind® DNase I. This is a name change only.
• Proteinase K is now supplied in a liquid form eliminating the step to resuspend prior
to use. Proteinase K Solution can also be stored at room temperature for 12 months.
• Proteinase Storage Buer is no longer included in the kit.