RNA Detection

(nextflipdebug2) #1
design offered cooperative hybridization between the capture
probes on the solid surface and the multiple CEs binding to
one target, presumably leading to a stronger capture than
single CE–capture probe interaction [5], which makes sure
that only the specific target can be captured to the solid surface
and further trigger downstream cascade reactions.


  1. As the hybridization is taken place at a temperature (58C)
    that is higher than the annealing temperature of single CE or
    LE probe, single probes or hairpins will be washed off and
    cannot be stably immobilized on the solid surface to cause
    nonspecific absorption. Leaky hairpin polymerization products
    without binding to the target will be washed off as well without
    causing background.


References



  1. Dirks RM, Pierce NA (2004) Triggered amplifi-
    cation by hybridization chain reaction. Proc Natl
    Acad Sci U S A 101(43):15275–15278. doi:10.
    1073/pnas.0407024101

  2. Choi HM, Beck VA, Pierce NA (2014) Next-
    generation in situ hybridization chain reaction:
    higher gain, lower cost, greater durability. ACS
    Nano 8(5):4284–4294. doi:10.1021/
    nn405717p

  3. Dong J, Cui X, Deng Y, Tang Z (2012) Ampli-
    fied detection of nucleic acid by G-quadruplex
    based hybridization chain reaction. Biosens
    Bioelectron 38(1):258–263. doi:10.1016/j.
    bios.2012.05.042
    4. Spiga FM, Bonyar A, Ring B, Onofri M, Vinelli
    A, Santha H, Guiducci C, Zuccheri G (2014)
    Hybridization chain reaction performed on a
    metal surface as a means of signal amplification
    in SPR and electrochemical biosensors. Biosens
    Bioelectron 54:102–108. doi:10.1016/j.bios.
    2013.10.036
    5. Xu Y, Zheng Z (2016) Direct RNA detection
    without nucleic acid purification and PCR:
    Combining sandwich hybridization with signal
    amplification based on branched hybridization
    chain reaction. Biosens Bioelectron
    79:593–599. doi:10.1016/j.bios.2015.12.057


196 Yao Xu and Zhi Zheng

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