PMID- 24510380 OWN - NLM STAT- MEDLINE DCOM- 20140708 LR - 20211021 IS - 1934-6638 (Electronic) IS - 1934-662X (Print) IS - 1934-662X (Linking) VI - 122 IP - 5 DP - 2014 May TI - Optimizing detection of RET and PPARg rearrangements in thyroid neoplastic cells using a home-brew tetracolor probe. PG - 377-85 LID - 10.1002/cncy.21397 [doi] AB - BACKGROUND: Fluorescence in situ hybridization (FISH) to identify specific DNA target sequences in the nuclei of nondividing cells of numerous solid neoplasms has contributed to the introduction of molecular cytogenetics as a useful adjunct to cytology, leading recently to the "marriage" of the 2 disciplines. Numerous cancer molecular markers can now be investigated using different technical approaches, at both the gene and expression levels, in biopsies of various suspected cancers, including differentiated thyroid carcinoma. The limited amount of bioptic material is often insufficient to carry out multiple tests, and optimizing handling of the biopsy is desirable. METHODS: We have developed a home-brew tetracolor break-apart probe able to simultaneously identify the 2 most common genetic alterations in differentiated thyroid carcinoma: RET/PTC variants in papillary thyroid carcinoma and PAX8/PPARg fusion and variants in follicular thyroid carcinoma. RESULTS: The probe had 100% specificity, 99.5% sensitivity, and >/= 3% cutoff. The probe was tested on RET/PTC and PAX8/PPARg RT-PCR positive controls, and feasibility was assessed in 368 thyroid nodule fine-needle aspirations (FNA). In the latter analysis, 24 FNAs had split RET signal, and 9 had split PPARg signal. FISH analysis of available surgically removed nodules confirmed the sensitivity of FISH in detecting abnormal clones and oligoclones. CONCLUSIONS: The home-brew tetracolor probe showed high feasibility, optimizing the use of the biological material in relation to the available molecular tests and maximizing the FISH experimental and slide-scoring times. This probe may be considered an alternative to RT-PCR when recovery and quality of RNA amplification from FNA are insufficient. CI - (c) 2014 The Authors. Cancer Cytopathology published by Wiley Periodicals, Inc. on behalf of American Cancer Society. FAU - Caria, Paola AU - Caria P AD - Department of Biomedical Sciences, University of Cagliari, Cagliari, Italy. FAU - Frau, Daniela V AU - Frau DV FAU - Dettori, Tinuccia AU - Dettori T FAU - Boi, Francesco AU - Boi F FAU - Lai, Maria L AU - Lai ML FAU - Mariotti, Stefano AU - Mariotti S FAU - Vanni, Roberta AU - Vanni R LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140207 PL - United States TA - Cancer Cytopathol JT - Cancer cytopathology JID - 101499453 RN - 0 (Fluorescent Dyes) RN - 0 (PPAR gamma) RN - 0 (RNA, Messenger) RN - EC 2.7.10.1 (Proto-Oncogene Proteins c-ret) RN - EC 2.7.10.1 (RET protein, human) SB - IM MH - Adenocarcinoma, Follicular/genetics/pathology MH - Biopsy, Fine-Needle MH - Carcinoma, Papillary/genetics/pathology MH - Feasibility Studies MH - *Fluorescent Dyes MH - Follow-Up Studies MH - *Gene Rearrangement MH - Goiter, Nodular/genetics/pathology MH - Humans MH - In Situ Hybridization, Fluorescence MH - PPAR gamma/*genetics MH - Prognosis MH - Proto-Oncogene Proteins c-ret/*genetics MH - RNA, Messenger/genetics MH - Reverse Transcriptase Polymerase Chain Reaction MH - Sensitivity and Specificity MH - Thyroid Neoplasms/*genetics/*pathology PMC - PMC4231233 OTO - NOTNLM OT - FISH OT - FNA OT - PAX8/PPARg OT - RET/PTC OT - thyroid cancer EDAT- 2014/02/11 06:00 MHDA- 2014/07/09 06:00 PMCR- 2014/11/14 CRDT- 2014/02/11 06:00 PHST- 2013/10/24 00:00 [received] PHST- 2013/12/28 00:00 [revised] PHST- 2014/01/01 00:00 [accepted] PHST- 2014/02/11 06:00 [entrez] PHST- 2014/02/11 06:00 [pubmed] PHST- 2014/07/09 06:00 [medline] PHST- 2014/11/14 00:00 [pmc-release] AID - 10.1002/cncy.21397 [doi] PST - ppublish SO - Cancer Cytopathol. 2014 May;122(5):377-85. doi: 10.1002/cncy.21397. Epub 2014 Feb 7.