DEB-FAPy-dG Adducts of 1,3-Butadiene: Synthesis, Structural Characterization, and Formation in 1,2,3,4-Diepoxybutane Treated DNA.
DEB-FAPy-dG Adducts of 1,3-Butadiene: Synthesis, Structural Characterization, and Formation in 1,2,3,4-Diepoxybutane Treated DNA.
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DOI:
10.1002/chem.202103245
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发表时间:
2022-01-13
影响因子:
4.3
通讯作者:
Tretyakova, Natalia
中科院分区:
文献类型:
--
作者:
Pujari, Suresh S.;Krueger, Caitlin C. Jokipii;Chao, Christopher;Hutchins, Spencer;Hurben, Alexander K.;Boysen, Gunnar;Tretyakova, Natalia
Metabolic activation of the human carcinogen 1,3-butadiene (BD) by cytochrome 450 monooxygenases gives rise to a genotoxic diepoxide, 1,2,3,4-diepoxybutane (DEB). This reactive electrophile alkylates guanine bases in DNA to produce N7-(2-hydroxy-3,4-epoxy-1-yl)-dG (N7-HEB-dG) adducts. Because of the positive charge at the N7 position of the purine heterocycle, N7-HEB-dG adducts are inherently unstable and can undergo spontaneous depurination or base-catalyzed imidazole ring opening to give N6-[2-deoxy-D-erythro-pentofuranosyl]-2,6-diamino-3,4-dihydro-4-oxo-5-N-1-(oxiran-2-yl)propan-1-ol-formamidopyrimidine (DEB-FAPy-dG) adducts. Here we report the first synthesis and structural characterization of DEB-FAPy-dG adducts. Authentic standards of DEB-FAPy-dG and its 15N3-labeled analogue were used for the development of a quantitative nanoLC-ESI+-HRMS/MS method, allowing for adduct detection in DEB-treated calf thymus DNA. DEB-FAPy-dG formation in DNA was dependent on DEB concentration and pH, with higher numbers observed under alkaline conditions. Formamidopyrimidnes (FAPy) are highly mutagenic DNA lesions. Here we describe the first synthesis and complete structural characterization of a diepoxybutane (DEB) derived formamidopyrimidine of dG (DEB-FAPy-dG). An isotope dilution nanoLC-ESI+-HRMS/MS method was developed and DEB-FAPy-dG adducts were detected in DEB treated DNA.
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DOI:
10.1016/j.mrgentox.2009.05.006
发表时间:
2009-08
影响因子:
1.9
作者:
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影响因子:
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发表时间:
1999-05-14
期刊:
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影响因子:
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通讯作者:
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