Adapted from ACD Standard Protocol/Cheadle/Otero-Garcia Protocols
License: This is an open access protocol distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited
ACD protocol notes that tissues should be fixed in 10% NBF for 16-32 hours, and embedded in paraffin. Then, sectioned and dried overnight at RT. They suggest sectioned tissue be used in less than a year (4°C) or less than 3 months at room temperature.
Place slide horizontally in an incubation tray. Add ~5-8 drops of RNAscope Hydrogen Peroxide to cover each section. Incubate for 00:10:00 at Room temperature.
10m
Dab solution off and move to a rack in distilled water. Move up and down 5 times. Repeat with a fresh boat of distilled water.
Preparing Tissue (Day 1): Target Retrieval
Preparing Tissue (Day 1): Target Retrieval
1h 19m
1h 19m
Dilute Target Retrieval Regents (RNAscope) 1:10 in dH2O (25 mL/225 mL dH2O/boat). Mix well.
Place in microwave for 00:15:00at 95 °C.
15m
Transfer slides to a slide boat with 200 mL distilled water for 00:00:15.
15s
Transfer the slides to 100% ethanol for 00:03:00.
3m
Dry the slides in a 60 °C incubator (or Room temperature) for 00:05:00.
5m
Draw a hydrophobic barrier onto slides with ImmEdge pen. Do NOT due for fluorescent slides. Let the barrier dry for00:05:00. OPTIONAL PAUSE POINT Overnight atRoom temperature.
Place a wet Humidifying Paper in an incubation tray and warm for 00:30:00 at 40 °C(TC incubator). Keep the tray in the incubator when not in use. Insert the slides into the incubation tray.
30m
Add ~5 drops RNAScope Protease Plus (Protease III-Cheadle) to cover each section and place tray into the incubator at40 °C for00:30:00 (standard) (00:15:00-Otero-Garcia).
45m
Wash slides with 200 mL+ distilled water and slight agitation.
Wash slides with 200 mL+ distilled water and slight agitation. (1/2)
Wash slides with 200 mL+ distilled water and slight agitation. (2/2)
Wash Buffer: Warm 50x Buffer to 40 °C for 00:10:00 to00:20:00. Add 980 mL distilled water to 20 mL of RNAscope Wash Buffer in a 1 Lbottle. May need 1 L to 2 L per run. Mix well. Can be stored for up to one month.
30m
Probes: Prepare only those probes needed.
Warm probes for 00:10:00 at 40 °C, then let cool toRoom temperature. Add 1 volume C2 and volume C3 probes to 50 volumes C1 probe in a tube (e.g. 200 µL C1 + 4 µL C2). Invert to mix. Store at 4 °C for up to 6 months.
10m
Reagents: Warm AMP1-3, HRP-C1-3 and HRP blocks at Room temperature.
(Optional) Saline Sodium Citrate: 175.3 g NaCl + 88.2 g sodium citrate in 800 mListilled water. Adjust to7.0 with 1 Molarity (M) HCl. Add water to a final volume of 1 L. Sterilize by autoclaving and store at Room temperature for up to 2 months.
Remove liquid from slides. Add 4-6 drops RNAScope Multiplex FL v2 HRP-C1 to each slide. Incubate in incubator for 00:15:00 at 40 °C.
15m
Wash slides with Wash Buffer.
Wash slides with Wash Buffer 00:02:00 at Room temperature. (1/2)
2m
Wash slides with Wash Buffer 00:02:00 at Room temperature. (2/2)
2m
Remove liquid from slides. Add 200 µL Opal 520 to each slide. Incubate in HybEZ Oven for00:30:00at 40 °C.
30m
Wash slides with Wash Buffer.
Wash slides with Wash Buffer 00:02:00 at Room temperature. (1/2)
2m
Wash slides with Wash Buffer 00:02:00 at Room temperature. (2/2)
2m
Remove liquid from slides. Add 4-6 drops RNAScope Multiplex FL v2 HRP Blocker to each slide. Incubate in incubator for 00:15:00 at 40 °C.
15m
Wash slides with Wash Buffer.
Wash slides with Wash Buffer 00:02:00 at Room temperature. (1/2)
2m
Wash slides with Wash Buffer 00:02:00 at Room temperature. (2/2)
2m
STOP HERE IF USING JUST C1 PROBE. Continue to Immunofluorescence.
Repeat steps 26-32 with HRP-C2 and Opal 570, and again with HRP-C3 and Opal 690.
4% PFA fix for 00:15:00 at 4 °C.
15m
Then, wash with PBS-Otero-Garcia for 00:04:00. (1/2)
4m
Wash with PBS-Otero-Garcia for 00:04:00. (2/2)
4m
Day 2: Immunofluorescence
Day 2: Immunofluorescence
1h 15m
1h 15m
Wash in0.1 Molarity (M) Tris buffer, 7.600:05:00. Discard all Tris washes.
5m
Block in 0.1 Molarity (M) Tris/2% FBS (Tris/FBS) 00:30:00+. Keep blocking solution for up to 2 weeks @ 4 °C.
30m
Dilute primary antibodies in Tris/FBS), and prepare humidified chamber(s) by soaking towel in the middle of the slide chamber(s).
Wipe excess fluid off back of slides and from around tissue and apply200 µL of primary antibody to slides.
Incubate at4 °C in humidified chamber00:45:00 to 02:00:00 at Room temperatureor Overnight at 4 °C.
4h 45m
Day 3
Day 3
1h 15m
1h 15m
Rinse off antibody from tissue using Tris.
Wash in Tris 00:05:00.
5m
Block in Tris/FBS 00:05:00.
5m
Dilute fluorophore-conjugated secondary antibody 1:500 in Tris/FBS and apply 200 µL to wiped slides. Incubate atRoom temperature for 02:00:00 or Overnightat 4 °C.
4h
Rinse off slides with Tris.
Wash in running tap H2O for 00:05:00.
5m
Wash in Tris for 00:05:00 in green boats.
5m
Coverslip using non-photobleaching reagent (Prolong Gold with DAPI or FluorMount with DAPI). Allow to dry completely before imaging on scanner.