Abstract:
:The chlorinated hydrocarbons chloroform (CHCl3), 1,1-dichlorethane (1,1-DCE) and 1,2-dichloroethane (1,2-DCE) have been detected in finished drinking water. When administered to B6C3F1 mice by gavage in corn oil, these compounds have been shown to induce hepatic tumors. The present study examines the effect on liver tumor incidence of continuous treatment of CHCl3 (600 mg/L and 1800 mg/L), 1,1-DCE (835 mg/L and 2500 mg/L), and 1,2-DCE (835 mg/L and 2500 mg/L) administered in drinking water to male B6C3F1 mice using a two-stage (initiation/promotion) treatment protocol. Seventy 4-week-old male B6C3F1 mice constituted each treatment group. Of these mice, 35 were initiated by treatment with diethylnitrosamine (DENA) (10 mg/L) in the drinking water for 4 weeks. The remaining 35 received deionized drinking water. Each group was subsequently treated with one of two concentrations of CHCl3, 1,1-DCE, or 1,2-DCE in drinking water for 52 weeks. An additional group received phenobarbital (PB) (500 mg/L) and served as the positive control for liver tumor promotion. Mice were sampled after 24 weeks (10 mice) and 52 weeks (25 mice). At sampling, liver and lung tumors were detected. None of the compounds increased the number or incidence of lung or liver tumors by themselves. PB promoted liver tumor formation (but not lung tumors) in the DENA-initiated mice. 1,1-DCE and 1,2-DCE did not affect the incidence or number of liver or lung tumors in the DENA-initiated animals. CHCl3, however, inhibited liver and lung tumorigenesis in the DENA-initiated mice.
journal_name
Environ Health Perspectjournal_title
Environmental health perspectivesauthors
Klaunig JE,Ruch RJ,Pereira MAdoi
10.1289/ehp.866989subject
Has Abstractpub_date
1986-11-01 00:00:00pages
89-95eissn
0091-6765issn
1552-9924journal_volume
69pub_type
杂志文章abstract::Although press reports indicate that the leakage of methyl isocyanate (MIC) on December 3, 1984, in Bhopal has led to an increase in spontaneous abortions, stillbirths, infant mortality, and fetal abnormalities, no clinical or experimental studies on the reproductive toxicity of MIC were reported in scientific journal...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8772153
更新日期:1987-06-01 00:00:00
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更新日期:1977-12-01 00:00:00
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doi:10.1289/ehp.1409052
更新日期:2016-03-01 00:00:00
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更新日期:1995-10-01 00:00:00
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更新日期:2013-02-01 00:00:00
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更新日期:2017-04-01 00:00:00
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pub_type: 历史文章,杂志文章
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更新日期:1996-12-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
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更新日期:1987-11-01 00:00:00
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doi:10.1289/ehp.94102958
更新日期:1994-11-01 00:00:00
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更新日期:2004-10-01 00:00:00
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更新日期:1993-09-01 00:00:00
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更新日期:2012-02-01 00:00:00
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更新日期:2007-02-01 00:00:00
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doi:10.1289/ehp.11608
更新日期:2009-03-01 00:00:00
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更新日期:2014-02-01 00:00:00
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pub_type: 杂志文章
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更新日期:2013-10-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:1990-03-01 00:00:00
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更新日期:2010-12-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7863
更新日期:2006-02-01 00:00:00
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更新日期:2005-09-01 00:00:00
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pub_type: 历史文章,杂志文章
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更新日期:2012-06-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
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更新日期:2006-06-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.9297145
更新日期:1992-07-01 00:00:00