Unconfigured Ad

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • DrDTonge
    Member
    • May 2011
    • 23

    #1

    DNase treat RNA before SOLiD Small RNA?

    Dear all,

    As the title suggests I am running a batch of small RNA sequencing using the SOLiD system. Having extracted good quality total RNA (RIN >9), the yield of some samples is rather low (as low as 20ng/ul). Therefore I'm trying to find out whether gDNA could possibly affect small RNA sequencing in an attempt to avoid this step and the likely sample loss.

    My thinking is that I perform the ligation reaction (which favours single stranded species) and then following cDNA synthesis, size select to only include the miRNA size range. Given that gDNA is huge, and that I don't perform any sort of digest or sonication, I am right in thinking there is a limited chance of me including any gDNA in my library.

    Happy to be completely wrong...!

    D :-)
  • DrDTonge
    Member
    • May 2011
    • 23

    #2
    Going to give the DNase treatment a shot with a single sample to determine the RNA recovery post precipitation. I think I'd be happier running DNase prior to library prep so here goes...

    Comment

    • pmiguel
      Senior Member
      • Aug 2008
      • 2328

      #3
      Probably you are right. Actually if your DNAse treatment does not go to completion you might increase the amount of DNA in the size fraction you are attempting to isolate.

      --
      Phillip

      Comment

      • DrDTonge
        Member
        • May 2011
        • 23

        #4
        Thanks very much for your input.

        I have run a trial DNase treatment and am unhappy with the recovery of small RNAs following precipitation.

        Your comments with regards incomplete DNase digestion are very interesting. In fact this was my greatest concern as incomplete gDNA digest could leave DNA species at the correct size for inclusion following cDNA size selection.

        Best wishes and thanks once again,

        D

        Comment

        Latest Articles

        Collapse

        • SEQadmin2
          Multiomic Liquid Biopsy: What DNA/RNA Panels Reveal That DNA Alone Can’t
          by SEQadmin2



          Tumors contain complex mixtures of cell populations that evolve in response to treatment and host-specific factors. Tissue biopsies provide only static snapshots of a tumor’s state. But what if we could follow that evolution over time using a minimally invasive technique?

          Liquid biopsies can detect tumor-derived material circulating in the bloodstream, providing a way to study treatment response, detect emerging resistance, and discover new biomarkers. Circulating
          ...
          10-14-2026, 09:55 AM
        • SEQadmin2
          New Genomics Technologies Take Aim at Long-Standing Limits
          by SEQadmin2


          Researchers using sequencing and genomics tools often have to make trade-offs. They can choose between speed or scale, short reads or long-range information, or targeted panels or a view of the whole transcriptome. New technologies that have been released this year are built to address those tough choices.

          We asked six companies the same four questions to learn about their latest products. The new technologies bring a lot to the table, including rethinking sequencing
          ...
          09-28-2026, 10:25 AM

        ad_right_rmr

        Collapse

        News

        Collapse

        Topics Statistics Last Post
        Started by SEQadmin2, Yesterday, 11:13 AM
        0 responses
        19 views
        0 reactions
        Last Post SEQadmin2  
        Started by SEQadmin2, Yesterday, 10:48 AM
        0 responses
        18 views
        0 reactions
        Last Post SEQadmin2  
        Started by SEQadmin2, 10-15-2026, 10:52 AM
        0 responses
        36 views
        0 reactions
        Last Post SEQadmin2  
        Started by SEQadmin2, 10-14-2026, 05:39 AM
        0 responses
        42 views
        0 reactions
        Last Post SEQadmin2  
        Working...