E18.5 C57BL6 NKX2.1, AGER, and ACTA2 Confocal Imaging

 

Immunofluorescence: NKX2.1, AGERand ACTA2

 Purpose:  Stain slides of 7µm frozen sections of C57BL/6J E18.5 lung for NKX2.1, AGER, and ACTA2 with antigen retrieval

Day 1

  1. For Frozen tissue, rinse 2X in PBS, then 5 min in 4% PFA/PBS, then rinse 1X in PBS.
  2. Briefly equilibrate slides in Antigen Retrieval Buffer.
  3. Antigen retrieval, pH 6.0 (times will vary according to microwave).
  4. 10 mM sodium citrate, pH 6.0, and heat in a microwave at 96oC. *We usually do a series of three runs (6-7 minutes each run) to equal the time/temp because of evaporation (refill coplin jars with dH2O).
  5. Microwave according to instructions on microwave.
  6. Cool on countertop, 15 min.
  7. Rinse with dH2O
  8. 1X PBS, 5 min.
  9. Block in 4% Goat serum/PBS-T, 2 hours at RT.
  10. For Rabbit anti- NKX2.1  (RB TTF-1 1231, Lot# 0912A) dilute 1:1000, For rat anti-AGER (MAB 1179-500, RND Systems) dilute 1:100, for mouse anti-ACTA2 (α Smooth muscle actin, A5228, Sigma) dilute 1:2000 in blocking buffer. Spin down in µfuge for 10 minutes and incubate on tissue overnight @ 4oC.

Day 2

  1. Rinse slides in PBS-T 3X, 5 min.
  2. Apply secondary antibody, Goat Alexa Fluor 488 anti-rabbit IgG (A11034, Lot# 1298480, for anti-NKX2.1),Donkey Alexa Fluor 568 anti-rat IgG (<