Linked Life Data

9008725

Source:http://linkedlifedata.com/resource/pubmed/id/9008725

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3-4
pubmed:dateCreated
1997-2-19
pubmed:abstractText
A micronucleus assay employing fluorescence in situ hybridization (FISH) with a centromeric probe was used on specimens of exfoliated buccal and nasal cells collected from mortuary science students exposed to embalming fluid containing formaldehyde. FISH labeling allowed micronuclei (MN) containing a whole chromosome (centromere-positive, MN+) to be differentiated from those containing only chromosomal fragments (centromere-negative, MN-). Each student was sampled before and after the 90 day embalming class. We determined if an increase in MN frequency could be attributed to formaldehyde exposure and was specific to either MN+ or MN-. In buccal cells, total MN frequency was significantly increased from 0.6/1000 to 2/1000 (p = 0.007) following the course, whereas in nasal cells it was not (2 and 2.5/1000, respectively, p = 0.2). Cells with multiple MN were present only in samples taken after exposure to embalming fluid. Although the baseline frequency was higher for MN+ in both buccal (0.4/1000 for MN+ and 0.1/1000 for MN-) and nasal cells (1.2/1000 for MN+ and 0.5/1000 for MN-), the increase in MN frequency was greater for MN-, (9-fold, p = 0.005 for buccal cells; 2-fold, p = 0.03 for nasal cells) than for MN+ (> 2-fold, p = 0.08 for buccal cells; no change, p = 0.31 for nasal cells) in both tissues. Thus, the primary mechanism of micronucleus formation appeared to be chromosome breakage. This finding is consistent with known clastogenic properties of formaldehyde, the component of embalming fluid most likely responsible for micronucleus induction.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0027-5107
pubmed:author
pubmed:issnType
Print
pubmed:day
20
pubmed:volume
371
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
237-48
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Quantification of epithelial cell micronuclei by fluorescence in situ hybridization (FISH) in mortuary science students exposed to formaldehyde.
pubmed:affiliation
Division of Environmental Health Sciences, School of Public Health, University of California at Berkeley 94720, USA. ninah@uclink4.berkeley.edu
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.