The miRNA-126 ISH was performed essentially as previously described [29 (link),30 (link)]. In brief, 6-μm thick tissue sections were pre-treated with a proteinase-K solution followed by hybridization with a double 6-carboxyfluorescein (FAM)-labelled Locked Nucleic Acid (LNA) miRCURY probe (LNA™ microRNA detection probe, Exiqon A/S, Denmark). After stringent washes in SSC buffers, the probes were detected with alkaline phosphatise-conjugated sheep anti-FAM Fab fragments (Roche). The 4-nitro-blue tetrazolium (NBT) and 5-brom-4-chloro-3′-Indolyl-phosphate (BCIP) substrate (Roche) were added and samples were incubated leading to a blue precipitate (the ISH signal). Counterstaining was performed with nuclear fast red. All slides were processed in a Tecan Freedom Evo automated hybridization instrument (Tecan, Männedorf, Switzerland) [30 (link)] in series of 48 slides per run.
Free full text: Click here