title: Effects of folate in culture medium on common fragile sites in lymphocyte chromosomes from normal and leukemic children.
abstract: The expression of common fragile sites at 69 bands was evaluated in 20 normal children and in 15 children with newly diagnosed acute leukemia using medium with folate (FA+) and without folate (FA-). As expected, the FA- medium significantly increased expression of aberrations in all study groups but the differences were larger for normal children than leukemic children. The major effect of the FA- medium was a generalized increase in aberration frequency over all sites rather than site-specific increases. A tendency toward clumping of aberrations within cells was exhibited in both media. Aberrations were seen at 81% (FA+) and 83% (FA-) of the 69 bands, with 4 sites - 3p14, 6p21, 9q13, and 17q23 - recorded in most of the study individuals. In addition, 12 sites not previously recorded as common or rare sites had significant levels of expression in at least one study group.
authors.affiliation: Division of Environmental Health Laboratory Sciences, Centers for Disease Control, Atlanta, GA 30333.
authors.forename: R J
authors.initials: RJ
authors.lastname: Green
authors.forename: D L
authors.initials: DL
authors.lastname: Phillips
authors.forename: A T
authors.initials: AT
authors.lastname: Chen
authors.forename: J A
authors.initials: JA
authors.lastname: Reidy
authors.forename: A H
authors.initials: AH
authors.lastname: Ragab
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D002478:Cells, Cultured; D002648:Child; D002675:Child, Preschool; D043283:Chromosome Fragile Sites; D002873:Chromosome Fragility; D003470:Culture Media; D005260:Female; D005492:Folic Acid / Q000494:pharmacology*; D006801:Humans; D007223:Infant; D007938:Leukemia / Q000235:genetics*; D008214:Lymphocytes / Q000648:ultrastructure*; D008297:Male
chemical_list: D003470:Culture Media; D005492:Folic Acid