Figure 4From: In situdetection of non-polyadenylated RNA molecules using Turtle Probes and target primed rolling circle PRINSDetection of RNA in FFPE tissue. Representative results of RNA detection in FFPE human tissue from an anonymous patient with Epstein-Barr Virus (EBV)-associated Hodgkin's lymphoma. EBER1 RNA should appear in the neoplastic Reed-Sternberg cells and not in the surrounding lymphocytes. The counterstain is DAPI, producing blue cell nuclei. (A) Detection of EBV-encoded early RNA (EBER)1 with a Turtle Probe (TP-EBER1-id33). (B) Detection of the same target on the same material with a Padlock Probe (PP-EBER1-id16). (C) Combined detection of EBER1 and hTR with the probes TP-EBER1-id33 (green) and TPhTR-id16 (red). The two probes were co-hybridized, co-amplified, and co-detected with a mixture of Lin16 (red identifier) and Lin33 (green identifier). (D-F) Negative controls identical to (B), save for the following: (D) pretreatment with RNase, (E) exclusion of the Turtle Probe, or (F) replacement of the correct probe with a non-complementary probe (the EBV1-id16 probe, which does not recognize EBER1, but rather the BamHI repeat of EBV). A 63× objective was used and scale bar is 50 μm.Back to article page