Automated Multiplexing Quantum Dots in Situ Hybridization Assay for Simultaneous Detection of ERG and PTEN Gene Status in Prostate Cancer  Wenjun Zhang,

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Automated Multiplexing Quantum Dots in Situ Hybridization Assay for Simultaneous Detection of ERG and PTEN Gene Status in Prostate Cancer  Wenjun Zhang, Antony Hubbard, Patrick Brunhoeber, Yixin Wang, Lei Tang  The Journal of Molecular Diagnostics  Volume 15, Issue 6, Pages 754-764 (November 2013) DOI: 10.1016/j.jmoldx.2013.06.005 Copyright © 2013 American Society for Investigative Pathology and the Association for Molecular Pathology Terms and Conditions

Figure 1 Schematic illustration of the simultaneous detection of four molecular targets using the four-color multiplexing QD fluorophores ISH assay. Step 1: Tissue specimens are pretreated for optimal nuclear permeabilization. Step 2: DIG-labeled, DNP-labeled, TS sulfonamide-labeled, and NP-labeled DNA probes hybridize to their respective molecular targets. Four anti-hapten antibodies that are conjugated to QD525, QD565, QD605, and QD655 detect the probes. The Journal of Molecular Diagnostics 2013 15, 754-764DOI: (10.1016/j.jmoldx.2013.06.005) Copyright © 2013 American Society for Investigative Pathology and the Association for Molecular Pathology Terms and Conditions

Figure 2 Examples of nuclei classified as negative or positive for ERG gene rearrangement. A nucleus with: one pair of adjacent red and green signals and fused yellow signal (A); two pairs of adjacent red and green signals (B); one pair of adjacent red and green signals and a single green signal without a corresponding red signal (C); one pair of adjacent red and green signals and one pair of broken apart red and green signals (D); two pairs of broken apart red and green signals (E); one pair of adjacent red and green signals and a single red signal without a corresponding green signal (F); one pair of adjacent red and green signals, one pair of broken apart red and green signals, and a single red signal without a corresponding green signal (G). The nuclei shown in A–C are all considered negative and positive in D–G for ERG gene rearrangement. The Journal of Molecular Diagnostics 2013 15, 754-764DOI: (10.1016/j.jmoldx.2013.06.005) Copyright © 2013 American Society for Investigative Pathology and the Association for Molecular Pathology Terms and Conditions

Figure 3 A representative image of a normal metaphase spread stained with ERG/PTEN four-color QD fluorophores ISH on a BenchMark ULTRA instrument (Ventana Medical Systems, Inc.). Two pairs of red signals representing ERG3p are shown adjacent to the two pair of green signals representing ERG5p. Two pairs of pink and blue signals representing PTEN and CEN10 are located on another chromosome. No extra signals of ERG3p, ERG5p, PTEN, or CEN10 probes were observed on other chromosomes. The Journal of Molecular Diagnostics 2013 15, 754-764DOI: (10.1016/j.jmoldx.2013.06.005) Copyright © 2013 American Society for Investigative Pathology and the Association for Molecular Pathology Terms and Conditions

Figure 4 Comparison of staining performance between condition 1 (CC2 and protease 3) and condition 2 (CC1, CC2, and protease 3) for tissue pretreatment. A: QD525 intensity. B: QD565 intensity. C: QD605 intensity. D: QD655 intensity. Fifteen slides with condition 1 result in a wide range of signal intensity and staining coverage, in which none was acceptable for all four targets. Fifteen slides with condition 2 result in consistently acceptable signal intensity (≥2) and staining coverage (>50%) for all four targets. The Journal of Molecular Diagnostics 2013 15, 754-764DOI: (10.1016/j.jmoldx.2013.06.005) Copyright © 2013 American Society for Investigative Pathology and the Association for Molecular Pathology Terms and Conditions

Figure 5 Representative images of a benign prostate case stained with the ERG/PTEN four-color QD fluorophores ISH assay. H&E staining of a normal gland (A), ERG3p, ERG5p, PTEN, and CEN10 four-color ERG/PTEN QD ISH staining (B), two-color image of ERG3p (red) and ERG5p (green) (C), and two-color image of PTEN (pink) and CEN10 (blue) ISH staining (D). The Journal of Molecular Diagnostics 2013 15, 754-764DOI: (10.1016/j.jmoldx.2013.06.005) Copyright © 2013 American Society for Investigative Pathology and the Association for Molecular Pathology Terms and Conditions

Figure 6 Representative images of a prostate cancer case (VMSI-106-C21D) stained with the ERG/PTEN four-color QD fluorophores ISH assay. A: H&E staining. B: ERG3p, ERG5p, PTEN, and CEN10 4 QD ISH staining. C: Two-color image of ERG3p and ERG5p ISH staining. Single ERG 3p (red) and ERG5p (green) signals were observed in the nuclei of the epithelial cells. D–F: Two-color image of PTEN (pink) and CEN10 (blue) ISH staining in both tumor and stromal tissue area (D); two-color image of PTEN (pink) and CEN10 (blue) ISH staining in tumor area (E); and two-color image of PTEN (pink) and CEN10 (blue) ISH staining in stromal area (F). E and F closer views of the PTEN and CEN10 signals from the tumor area (E) or the adjacent stromal tissue area (F) marked in D. E: PTEN signal (pink) is missing in tumor cells, only CEN10 signals (blue) are present. F: The PTEN staining at the stromal area serves as the internal control. Both PTEN signals (pink) and CEN10 signals (blue) are present in the stromal area. The Journal of Molecular Diagnostics 2013 15, 754-764DOI: (10.1016/j.jmoldx.2013.06.005) Copyright © 2013 American Society for Investigative Pathology and the Association for Molecular Pathology Terms and Conditions