PMID- 9792422 OWN - NLM STAT- MEDLINE DCOM- 19981211 LR - 20191102 IS - 0948-6143 (Print) IS - 0948-6143 (Linking) VI - 110 IP - 4 DP - 1998 Oct TI - Fluorescence in situ hybridization using horseradish peroxidase-labeled oligodeoxynucleotides and tyramide signal amplification for sensitive DNA and mRNA detection. PG - 431-7 AB - We have used horseradish peroxidase-labeled 40 mer oligodeoxynucleotides (HRP-ODNs) specific for the human cytomegalovirus immediate early gene (HCMV-IE) and a novel dinitrophenol-tyramide signal amplification reagent (DNP-TSA plus) to evaluate their utility in fluorescence in situ hybridization (FISH). For DNA FISH, single or cocktails of HRP-ODNs were hybridized to metaphase chromosomes of rat 9G cells which, as determined by DNA fiber FISH, carry an integrated tandem repeat of 50-60 copies of the HCMV-IE gene. With one layer of DNP-TSA plus deposition and subsequent detection with a fluorochrome-conjugated antibody, four HRP-ODNs were needed to detect the HCMV-IE integration site. When employing two TSA amplification rounds, one HRP-ODN was sufficient for obtaining a strong signal of the integrated gene cluster, indicating that 50-60 HRP molecules can be detected with ease. In addition to DNA FISH, we report here the first use of HRP-ODN probes for mRNA detection by FISH. A single HRP-ODN and one DNP-TSA plus step resulted in clear visualization of the HCMV-IE gene transcripts in rat 9G cells induced for HCMV-IE expression by cycloheximide. Two TSA detection steps enhanced signal intensities even further. Parallel experiments with hapten-labeled ODN and cDNA probes and conventional detection methods illustrated the superiority of the HRP-ODN/TSA approach in DNA and RNA FISH. FAU - van de Corput, M P AU - van de Corput MP AD - Department of Molecular Cell Biology, Leiden University Medical Centre. FAU - Dirks, R W AU - Dirks RW FAU - van Gijlswijk, R P AU - van Gijlswijk RP FAU - van de Rijke, F M AU - van de Rijke FM FAU - Raap, A K AU - Raap AK LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Germany TA - Histochem Cell Biol JT - Histochemistry and cell biology JID - 9506663 RN - 0 (Antigens, Viral) RN - 0 (DNA, Viral) RN - 0 (Dinitrophenols) RN - 0 (Immediate-Early Proteins) RN - 0 (Indicators and Reagents) RN - 0 (Oligonucleotide Probes) RN - 0 (RNA, Messenger) RN - 0 (RNA, Viral) RN - 0 (immediate-early proteins, cytomegalovirus) RN - EC 1.11.1.- (Horseradish Peroxidase) SB - IM MH - Animals MH - Antigens, Viral/genetics MH - Cell Line MH - Cloning, Molecular MH - Cytomegalovirus/*genetics MH - DNA, Viral/*analysis MH - Dinitrophenols MH - Genes, Immediate-Early MH - *Horseradish Peroxidase MH - Humans MH - Immediate-Early Proteins/genetics MH - In Situ Hybridization, Fluorescence/*methods MH - Indicators and Reagents MH - Metaphase MH - *Oligonucleotide Probes MH - RNA, Messenger/*analysis MH - RNA, Viral/analysis MH - Rats MH - Virus Integration EDAT- 1998/10/29 00:00 MHDA- 1998/10/29 00:01 CRDT- 1998/10/29 00:00 PHST- 1998/10/29 00:00 [pubmed] PHST- 1998/10/29 00:01 [medline] PHST- 1998/10/29 00:00 [entrez] AID - 10.1007/s004180050304 [doi] PST - ppublish SO - Histochem Cell Biol. 1998 Oct;110(4):431-7. doi: 10.1007/s004180050304.