Experiments

Advanced Operations


HCR

サムネイル

Hybridization Chain Reaction

EXPAR

サムネイル

Exponential Amplification Reaction

TWJ-EXPAR

サムネイル

Three-Way-Junction-EXPAR

ThisAmp

サムネイル

ThisAmp

TWJ-Toehold

サムネイル

Three-Way-Junction-Toehold

TWJ-2cycle

サムネイル

Three-Way-Junction-2cycle

Multistep-SDA

サムネイル

Strand Displacement Amplification

Cas3

サムネイル

Cas3-Cascade/crRNA complex

Cas12a

サムネイル

Cas12a

LFA

サムネイル

Lateral Flow Assay

Basic Operations


  1. Add tap water until the drainboard at the bottom of the can is slightly submerged.
  2. Place 1.5 mL tubes in a sterile bag and place it on top of the drainboard.
  3. Select Sterilize and Keep Warm and start at 121 ℃ and 15 minutes.
  4. Wait approximately 1 hour and 15 minutes.
  1. Prepare agarose gel (1%).
    1. Add 400 mL of 1x TAE to an Erlenmeyer flask.
    2. Add 4 g of agarose.
    3. Heat the solution by microwave until it boils, while stirring appropriately.
    4. After the solution has cooled to 50 ℃, add 16 μL of Midori Green solution.
    5. Pour the solution into the plate and leave for one hour.
    6. Store the gel on a kimtowel moistened with nuclease free water.
  2. Place the prepared gel on the gel bed of the migration tank.
  3. Pour buffer solution to a level of about 3 mm above the surface of the gel.
  4. Apply 10 µL of the sample to the wells.
  5. Start migration.
  6. After preparing the dye in a sealable container, remove the gel tray from the migration tank and submerge it in the stain solution.
  7. After allowing it to stand for the required amount of time, remove the gel and place it on the transilluminator for observation.
  1. Check that the cleaning water bottle contains Dw and that the waste liquid tank is not full, and then clean the probe.
  2. Perform microchip cleaning.
  3. Register the samples on the capillary electrophoresis device MultiNA and set the wells to contain the samples.
  4. Dilute a solution of the fluorescent dye (diluted 100 times with TE) 100 times with DNA-500 (gel) to create a separation buffer.
  5. Place the calculated amount of the DNA marker displayed on MultiNA into a 0.5 mL tube.
  6. Cut the 8-tube strips into 2-tube strips, and add 15 µL of the size ladder to one tube.
  7. Set the cleaning solution, separation buffer, DNA marker, and size ladder in the designated positions.
  8. Dispense 10 µL of the electrophoresis samples into 8-tube strips and place them in the wells set in step 3.
  9. Start analysis.

Ref. Shimadzu Corporation. (n.d.). Microchip Electrophoresis System for DNA/RNA Analysis MCE-202 MultiNA Instruction Manual. http://mor.niboch.nsc.ru/public/MBA_Course/References/Electrophoresis/devices/Shimadzu%20MultiNA%20manual.292-28464D_SWmanualMCE-202(E).pdf

  1. Blank with 1 µL of TE.
  2. Run 1 µL of samples.
  3. Rinse with 1 µL of TE after each sample.
  1. Set up the QuantStudio 3 Real-Time PCR System. Modify experiment settings as needed.
  2. Load a 96well plate in the instrument.
  3. Start the run.
1x HCR Buffer Components

20 mM Tris-HCl (pH. 8.0)
140 mM NaCl
5 mM KCl

1x LT Buffer Components

10 mM KCl aq.
10 mM Tris-HCl
18 mM MgSO4 aq.
10 mM (NH4)2SO4 aq.
pH8.7 at 25℃

1x UTokyo Buffer Components

60 mM KCl aq.
10 mM MgCl2 aq.
10 nM CoCl2 aq.
5 mM HEPES-NaOH
pH 7.7 at 25 ℃

References


  1. Jia, H.-Y., Zhao, H.-L., Wang, T., Chen, P.-R., Yin, B.-C., & Ye, B.-C. (2022). A Programmable and Sensitive CRISPR/Cas12a-based MicroRNA detection platform combined with hybridization chain reaction. Biosensors and Bioelectronics, 213, 114382. https://doi.org/10.1016/j.bios.2022.114382

  2. Carter, J. G., Orueta Iturbe, L., Duprey, J. H. A., Carter, I. R., Southern, C. D., Rana, M., Whalley, C. M., Bosworth, A., Beggs, A. D., Hicks, M. R., & Tucker, J. H. R. (2021). Ultrarapid detection of SARS-CoV-2 RNA using a reverse transcription-free exponential amplification reaction, RTF-EXPAR. Proceedings of the National Academy of Sciences, 118(35), e2100347118. https://doi.org/10.1073/pnas.2100347118

  3. Ying, X., Yu, W., Su, Liu., Jinghua, Y., Hongzhi, W., Yuna, G., & Jiadong, H. (2016).Ultrasensitive and rapid detection of miRNA with three-way junction structure-based trigger-assisted exponential enzymatic amplification. Biosensors and Bioelectronics, 81, 236-241. https://doi.org/10.1016/j.bios.2016.02.034

  4. Lee, S., Jang, H., Kim, H. Y., & Park, H. G. (2020). Three-way junction-induced isothermal amplification for nucleic acid detection. Biosensors and Bioelectronics, 147, 111762. https://doi.org/10.1016/j.bios.2019.111762

  5. Chen, M., Jiang, X., Hu, Q., Long, J., He, J., Wu, Y., Wu, Z., Niu, Y., Jing, C., & Yang, X. (2024). Toehold-Containing Three-Way Junction-Initiated Multiple Exponential Amplification and CRISPR/Cas14a Assistant Magnetic Separation Enhanced Visual Detection of Mycobacterium tuberculosis. ACS Sensors, 9(1), 62–72. https://doi.org/10.1021/acssensors.3c01622

  6. Qing, Z., Feng, C.,Feng, X., Yongxi, Z., & Chunhai, F. (2014). Target-Triggered Three-Way Junction Structure and Polymerase/Nicking Enzyme Synergetic Isothermal Quadratic DNA Machine for Highly Specific, One-Step, and Rapid MicroRNA Detection at Attomolar Level. Anal. Chem. 2014, 86, 16, 8098-8105. https://doi.org/10.1021/ac501038r

  7. Komiya, K., Noda, C. & Yamamura, M. (2024). Characterization of Cascaded DNA Generation Reaction for Amplifying DNA Signal.New Gener. Comput. 42, 237-252. https://doi.org/10.1007/s00354-024-00249-2

  8. Yoshimi, K., Takeshita, K., Yamayoshi, S., Shibumura, S., Yamauchi, Y., Yamamoto, M., Yotsuyanagi, H., Kawaoka, Y., & Mashimo, T. (2022). CRISPR-Cas3-based diagnostics for SARS-CoV-2 and influenza virus.iScience 25, 103830, 1-13. https://doi.org/10.1016/j.isci.2022.103830

  9. Milenia Biotec GmbH. (n.d.). HybriDetect: Universal Lateral Flow Assay Kit. https://www.milenia-biotec.com/en/product/hybridetect/#nav-videos

  10. Tomy Seiko Co., Ltd. (n.d.). autoclave toha? [What is an autoclave (high-pressure steam sterilizer)?]. https://bio.tomys.co.jp/topics/detail/01097.php

  11. Takara Korea Biomedical Inc. (n.d.). Mupid-2 Plus Instruction Manual. https://www.takara.co.kr/file/manual/pdf/Mupid%202plus%20manual.pdf

  12. Shimadzu Corporation. (n.d.). Microchip Electrophoresis System for DNA/RNA Analysis MCE-202 MultiNA Instruction Manual. http://mor.niboch.nsc.ru/public/MBA_Course/References/Electrophoresis/devices/Shimadzu%20MultiNA%20manual.292-28464D_SWmanualMCE-202(E).pdf

  13. Thermo Fisher Scientific. (n.d.). QuantStudio 3 & 5 Real-Time PCR Systems. https://assets.fishersci.com/TFS-Assets/LSG/manuals/MAN0010407_QuantStudio3_5_InstallUseMaint_UG.pdf

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