PMID- 9003525 OWN - NLM STAT- MEDLINE DCOM- 19970220 LR - 20091119 IS - 0027-5107 (Print) IS - 0027-5107 (Linking) VI - 372 IP - 1 DP - 1996 Nov 11 TI - Frequencies of X-ray induced pericentric inversions and centric rings in human blood lymphocytes detected by FISH using chromosome arm specific DNA libraries. PG - 1-7 AB - Frequencies of intra-chromosomal exchanges (pericentric inversions and centric rings) and inter-chromosomal exchanges (dicentrics and translocations) in X-irradiated (2.5 Gy) human lymphocytes have been estimated. To detect these events we employed FISH (fluorescence in situ hybridization) technique and arm specific painting probes for chromosomes #1 and #3. The ratio between centric rings and pericentric inversions was found to be about 1. For intra-changes to inter-changes, the ratio (F) was between 6 and 9. Based on the total number of colour junctions involving chromosomes #1 and #3 it was found that exchanges between the arms of the same chromosome occur about 8.7 times more than inter-chromosomal exchanges calculated on the basis of the DNA content of the chromosomes and random induction of aberrations in the total genome. Chromosomal organization in interphase nucleus appears to promote the formation of more intra-changes than inter-changes following X-irradiation, most probably due to close proximity of the two arms of a chromosome. FAU - Natarajan, A T AU - Natarajan AT AD - Department of Radiation Genetics and Chemical Mutagenesis, Leiden University, Netherlands. Natarajan@rullf2.medfac.leidenuniv.nl FAU - Boei, J J AU - Boei JJ FAU - Vermeulen, S AU - Vermeulen S FAU - Balajee, A S AU - Balajee AS LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - Mutat Res JT - Mutation research JID - 0400763 SB - IM MH - *Chromosome Aberrations MH - Chromosome Inversion MH - Chromosomes, Human/*radiation effects MH - Chromosomes, Human, Pair 1/radiation effects MH - Chromosomes, Human, Pair 3/radiation effects MH - Gene Library MH - Humans MH - In Situ Hybridization, Fluorescence/*methods MH - Lymphocytes/*radiation effects MH - Male MH - Sensitivity and Specificity MH - Translocation, Genetic MH - X-Rays EDAT- 1996/11/11 00:00 MHDA- 1996/11/11 00:01 CRDT- 1996/11/11 00:00 PHST- 1996/11/11 00:00 [pubmed] PHST- 1996/11/11 00:01 [medline] PHST- 1996/11/11 00:00 [entrez] AID - S0027-5107(96)00209-6 [pii] AID - 10.1016/S0027-5107(96)00209-6 [doi] PST - ppublish SO - Mutat Res. 1996 Nov 11;372(1):1-7. doi: 10.1016/S0027-5107(96)00209-6.