title: Effect of high-level natural radiation on chromosomes of residents in southern China.
abstract: To study the effect of low-dose (rate) radiation on human health, we analyzed chromosomes of peripheral lymphocytes of residents in a high background radiation area (HBRA) and compared the results with those obtained from residents in a control area (CA) in Guangdong Province, China. Unstable types of chromosome aberrations (dicentrics and rings) were studied in 22 members of eight families in HBRA and 17 members of five families in CA. Each family consists of three generations. On average 2,600 cells per subject were analyzed. 27 adults and six children in HBRA and 25 adults and eight children in CA were studied with respect to translocations. On average 4,741 cells per subject were examined. We found an increase of the frequency of dicentrics and rings in HBRA, where the natural radiation level is three to five times higher than in the control area. But the increase of translocations in HBRA was within the range of individual variation in the controls.
authors.affiliation: National Institute of Radiological Sciences, Chiba, Japan. hayata@nirs.go.jp
authors.forename: I
authors.initials: I
authors.lastname: Hayata
authors.forename: C
authors.initials: C
authors.lastname: Wang
authors.forename: W
authors.initials: W
authors.lastname: Zhang
authors.forename: D
authors.initials: D
authors.lastname: Chen
authors.forename: M
authors.initials: M
authors.lastname: Minamihisamatsu
authors.forename: H
authors.initials: H
authors.lastname: Morishima
authors.forename: L
authors.initials: L
authors.lastname: Wei
authors.forename: T
authors.initials: T
authors.lastname: Sugahara
mesh_terms: D000328:Adult; D001417:Background Radiation / Q000009:adverse effects*; D002648:Child; D002681:China; D002869:Chromosome Aberrations; D019457:Chromosome Breakage; D002877:Chromosomes, Human / Q000528:radiation effects* / Q000648:ultrastructure; D004307:Dose-Response Relationship, Radiation; D005260:Female; D006798:Housing; D006801:Humans; D008214:Lymphocytes / Q000528:radiation effects* / Q000648:ultrastructure; D008297:Male; D011886:Radon; D012303:Ring Chromosomes; D012987:Soil; D013910:Thorium; D014178:Translocation, Genetic; D014501:Uranium
chemical_list: D012987:Soil; D014501:Uranium; D013910:Thorium; D011886:Radon