title: 4FISH-IF, a four-color dual-gene FISH combined with p63 immunofluorescence to evaluate NKX3.1 and MYC status in prostate cancer.
abstract: NKX3.1 allelic loss and MYC amplification are common events during prostate cancer progression and have been recognized as potential prognostic factors in prostate cancer after radical prostatectomy or precision radiotherapy. We have developed a 4FISH-IF assay (a dual-gene fluorescence in situ hybridization combined with immunofluorescence) to measure both NKX3.1 and MYC status on the same slide. The 4FISH-IF assay contains four probes complementary to chromosome 8 centromere, 8p telomere, 8p21, and 8q24, as well as an antibody targeting the basal cell marker p63 visualized by immunofluorescence. The major advantages of the 4FISH-IF include the distinction between benign and malignant glands directly on the 4FISH-IF slide and the control of truncation artifact. Importantly, this specialized and innovative combined multiprobe and immunofluorescence technique can be performed on diagnostic biopsy specimens, increasing its clinical relevance. Moreover, the assay can be easily performed in a standard clinical molecular pathology laboratory. Globally, the use of 4FISH-IF decreases analytic time, increases confidence in obtained results, and maintains the tissue morphology of the diagnostic specimen.
authors: Department of Laboratory Medicine and Pathology/Applied Molecular Oncology, Toronto General Hospital, University Health Network, Toronto, Ontario, Canada. dtrudel@uhnres.utoronto.ca
authors: Dominique
authors: D
authors: Trudel
authors: Gaetano
authors: G
authors: Zafarana
authors: Jenna
authors: J
authors: Sykes
authors: Cherry L
authors: CL
authors: Have
authors: Robert G
authors: RG
authors: Bristow
authors: Theo
authors: T
authors: van der Kwast
mesh_terms: D003116:Color; D005455:Fluorescent Antibody Technique / Q000379:methods*; D018398:Homeodomain Proteins / Q000378:metabolism*; D006801:Humans; D017404:In Situ Hybridization, Fluorescence / Q000379:methods*; D008297:Male; D008565:Membrane Proteins / Q000378:metabolism*; D011471:Prostatic Neoplasms / Q000378:metabolism* / Q000473:pathology*; D016271:Proto-Oncogene Proteins c-myc / Q000378:metabolism*; D014157:Transcription Factors / Q000378:metabolism*
chemical_list: C081876:CKAP4 protein, human; D018398:Homeodomain Proteins; C489427:MYC protein, human; D008565:Membrane Proteins; C491178:NKX3-1 protein, human; D016271:Proto-Oncogene Proteins c-myc; D014157:Transcription Factors
keywords: MYC; NKX3.1; biopsy; fluorescence in situ hybridization; immunofluorescence; prostate cancer
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