Daniel:Notebook/ComboLock/2016-5-23

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Revision as of 17:24, 23 May 2016 by >Djacobse (→‎Protocol)
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C Probe Hybridization Test

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This will be the first test of the C Probe hybridization protocol for Combo-Lock. I have been growing U87MG cells for several days now and am ready to passage them. When I passage I'll take the remaining 90% for this test. Since I don't have the antibodies ready yet (I am waiting on some columns) I am just testing the C Probes.

Protocol

Buffer and Reagent Prep

  1. Wash Buffer
  2. Probe Hybridization

    Base Protocol

    1. Fix cells
      1. Start with confluent U87MG cells
      2. Remove media (EMEM) and wash with 1X PBS
      3. Trypsinize cells using 0.5 mL trypsin LE express; incubate 5 min at 37C
      4. Resuspend cells in by adding 4.5 mL media; use 0.5 mL to passage
      5. Pellet remainder of the cells in a 15 mL Falcon tube at 600g for 3 min
      6. Remove supernatant
      7. Fix cells in 5 mL EMEM with 1.6% paraformaldehyde for 10 min at RT
      8. Pellet cells by centrifuging at 600xg for 3 min
      9. Wash cells with 5 mL wash buffer
        1. add 0.5 uL RNasin (40 u/uL) to 5 mL wash buffer prime
      10. Pellet cells and add 5 mL ice-cold methanol to permeabilize; incubate 10 min on ice
    2. Hybridization
      1. Pellet cells via centrifugation at 600g for 3 min
      2. Heat C probes to 90C for 5 min; Chill probes on ice to quench
      3. Add probes to cells for final concentration of 100 nM
      4. Incubate probes at 40C for 1 hour with vigorous agitation
      5. Wash three times with wash buffer and pelleting at 600xg for 3 min
      6. Incubate cells for 20 min at 40C in stringent wash buffer

    Buffers

    1. Wash Buffer: 1X PBS, 0.1% Tween-20, 4 U/mL RNasin