Fine sectioning (5 μm) was done in formalin-fixed paraffin-embedded specimens on poly-L-lysine (Sigma, St. Louis, MO, USA) coated slides, followed by immunohistochemistry (IHC). The antigen retrieval for Cyclin D1 was performed in 10 mM tris-EDTA buffer (pH-9.0) at 900W for 15 min/360W for 5 min. The sections were consecutively washed in Tris buffer saline (TBS; 0.1M; pH: 7.4) and then incubated with primary antibody of Primary rabbit monoclonal of Cyclin D1 (monoclonal, M3635, Dako cytomation Glostrup, Denmark; 1:200 dilution) overnight followed by the use of polymer based secondary antibody (Envision System peroxidase kit, DAKO, Carpinteria, CA) for 1 hr at room temperature after washing with TBS. Previous studies from our laboratory have mentioned the complete methodological details9 (link),10 (link).
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