title: 1,1,1-trichloro-2,2-bis (p-chlorophenyl)-ethane (DDT) and reduced bone mineral density.
abstract: The organochlorine pesticide 1,1,1-trichloro-2,2-bis (p-chlorophenyl)-ethane (DDT), is a well-known and widely dispersed "environmental estrogen" (World Health Organization Criteria no. 9; Geneva, Switzerland [1979]). Kelce et al. (Nature, 1995; 375:581-85) recently identified the DDT metabolite, 1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene (DDE), has also recently been identified as a potent androgen receptor antagonist. The authors examined the relationship between serum levels of DDE and bone mineral density in 68 sedentary women who reported adequate dietary intake of calcium. Reduced bone mineral density was correlated significantly with age (r = -.36, p = .004), as well as with increases in the log of DDE levels in serum (r = -.27, p = .03). The authors also used multiple-regression analysis to examine the influence of other predictor variables on the relationship between log DDE and bone mineral density. The strongest model (p = .002) included log DDE (p = .018), age (p = .002), and years on hormone replacement therapy (p = .10) as predictor variables, and this model afforded prediction of 21% of bone mineral density variation. These results suggest that past community exposures to DDT may be associated with reduced bone mineral density in women.
authors.affiliation: Southern Cross Institute of Health Research, Lismore, Australia.
authors.forename: J
authors.initials: J
authors.lastname: Beard
authors.forename: S
authors.initials: S
authors.lastname: Marshall
authors.forename: K
authors.initials: K
authors.lastname: Jong
authors.forename: R
authors.initials: R
authors.lastname: Newton
authors.forename: T
authors.initials: T
authors.lastname: Triplett-McBride
authors.forename: B
authors.initials: B
authors.lastname: Humphries
authors.forename: R
authors.initials: R
authors.lastname: Bronks
mesh_terms: D015502:Absorptiometry, Photon; D001315:Australia; D015519:Bone Density / Q000187:drug effects*; D002136:Calcium, Dietary / Q000008:administration & dosage*; D003634:DDT / Q000378:metabolism; D003633:Dichlorodiphenyl Dichloroethylene / Q000009:adverse effects* / Q000097:blood; D004781:Environmental Exposure; D005260:Female; D020249:Hormone Replacement Therapy; D006801:Humans; D007306:Insecticides / Q000009:adverse effects* / Q000097:blood; D008875:Middle Aged; D012044:Regression Analysis
chemical_list: D002136:Calcium, Dietary; D007306:Insecticides; D003633:Dichlorodiphenyl Dichloroethylene; D003634:DDT