Comparison of the Mutational Specificities Exhibited by BPDE in Escherichia Coli and CHO Cells
Comparison of the Mutational Specificities Exhibited by BPDE in Escherichia Coli and CHO Cells
复制标题
BPDE 在大肠杆菌和 CHO 细胞中表现出的突变特异性的比较
DOI:
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发表时间:
1989
期刊:
影响因子:
--
通讯作者:
B. Glickman
中科院分区:
文献类型:
--
作者:
M. Mazur;A. Gordon;C. Bernelot;B. Glickman
BPDE is presumably the ultimate reactive metabolite of benzo[a]pyrene (B[a]P), a well known carcinogenic environmental pollutant. It has become evident that most chemical carcinogens are active only after metabolism to an ultimate carcinogenic and mutagenic form. These ultimate carcinogens tend to be electron deficient and thus react with nuclephilic sites which are abundant in DNA. It has been established that B[a]P is metabolized by the mixed function oxygenases to a variety of products, including the four enantiomeric forms of BPDE (anti or syn; ( + ) or (−)) (Fahl, 1982). Interestingly, metabolism of B[a]P in mammalian cells produces primarily the (+) anti-BPDE isomer (Yang, et al., 1978). However, not all DNA reactions with these ultimate carcinogens are of equal biological importance. It has been shown at the hprt locus in CHO cells that the respective mutagenic efficiency of BPDE is (+)anti > >(−)anti = (+/−)syn, and remarkably the reverse is seen at the crpt locus in TA100 bacteria (−) anti = (+/−) syn > ( + ) anti (Stevens, et al., 1985). It is also known that the ( + ) anti enantiomer is more than 60 fold more active as a tumor initiator in CD-1 and Sencar mice (Pelling, et al., 1984).
影响因子:
3.9
作者:
Fahl,WE
通讯作者:
Fahl,WE
DOI:
10.1016/0027-5107(85)90040-5
发表时间:
1985
期刊:
Mutation research
影响因子:
--
作者:
Stevens,CW;Bouck,N;Burgess,JA;Fahl,WE
通讯作者:
Fahl,WE
DOI:
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发表时间:
1984
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Sage,E;Haseltine,WA
通讯作者:
Haseltine,WA