PMID- 16460913 OWN - NLM STAT- MEDLINE DCOM- 20060629 LR - 20071114 IS - 0890-8508 (Print) IS - 0890-8508 (Linking) VI - 20 IP - 2 DP - 2006 Apr TI - Dendrimer FISH detection of single-copy intervals in acute promyelocytic leukemia. PG - 114-20 AB - Acute promyelocytic leukemia (AML-M3) is characterized by a translocation between chromosomes 15 and 17 [t(15;17)]. The detection of t(15;17) at the single cell level, is commonly done by fluorescence in situ hybridization (FISH) using recombinant locus specific genomic probes greater than 14 kilobases kb in length. To allow a more thorough study of t(15;17), we designed small (0.9-3.6 kb), target-specific, single-copy probes from the human genome sequence. A novel detection approach was evaluated using moieties possessing more fluorophores, DNA dendrimers (up to 375 fluorophores per dendrimer). Two detection approaches were evaluated using the dendrimers: (1) dendrimers modified with anti-biotin antibodies for detection of biotinylated bound probes, and (2) dendrimers modified with 45-base long oligonucleotides designed from the single-copy probes, for direct detection of the target region. The selectivity of the probes was confirmed via indirect labeling with biotin/digoxigenin by nick translation, with detection efficiencies between 50 and 90%. Furthermore, the scFISH probes were successfully detected on metaphase cells with anti-biotin dendrimer conjugates and on interphase cells with 45-base modified dendrimers. Our results bring up the possibility to detect target regions of less than 1 kb, which will be a great contribution to high-resolution analysis of genomic sequences. FAU - Mora, Johanna R AU - Mora JR AD - Department of Chemistry, University of Kansas, Lawrence, 66045, USA. FAU - Knoll, Joan H M AU - Knoll JH FAU - Rogan, Peter K AU - Rogan PK FAU - Getts, Robert C AU - Getts RC FAU - Wilson, George S AU - Wilson GS LA - eng GR - GM08359/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20060207 PL - England TA - Mol Cell Probes JT - Molecular and cellular probes JID - 8709751 RN - 0 (DNA Probes) RN - 0 (Dendrimers) SB - IM MH - Cell Line, Tumor MH - Chromosomes, Human, Pair 15/genetics MH - Chromosomes, Human, Pair 17/genetics MH - DNA Probes/chemistry MH - Dendrimers/chemistry MH - *Genome, Human MH - Humans MH - In Situ Hybridization, Fluorescence MH - Interphase MH - Leukemia, Promyelocytic, Acute/*genetics/pathology MH - Metaphase MH - *Translocation, Genetic EDAT- 2006/02/08 09:00 MHDA- 2006/06/30 09:00 CRDT- 2006/02/08 09:00 PHST- 2005/07/23 00:00 [received] PHST- 2005/11/09 00:00 [accepted] PHST- 2006/02/08 09:00 [pubmed] PHST- 2006/06/30 09:00 [medline] PHST- 2006/02/08 09:00 [entrez] AID - S0890-8508(05)00097-6 [pii] AID - 10.1016/j.mcp.2005.11.005 [doi] PST - ppublish SO - Mol Cell Probes. 2006 Apr;20(2):114-20. doi: 10.1016/j.mcp.2005.11.005. Epub 2006 Feb 7.