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- W2054710060 abstract "Antitumor nitrogen mustards, such as bis(2-chloroethyl)methylamine (mechlorethamine), are useful chemotherapeutic agents with a long history of clinical application. The antitumor effects of nitrogen mustards are attributed to their ability to induce DNA–DNA and DNA–protein cross-links (DPCs) that block DNA replication. In the present work, a mass spectrometry-based methodology was employed to characterize in vivo DNA–protein cross-linking following treatment of human fibrosarcoma (HT1080) cells with cytotoxic concentrations of mechlorethamine. A combination of mass spectrometry-based proteomics and immunological detection was used to identify 38 nuclear proteins that were covalently cross-linked to chromosomal DNA following treatment with mechlorethamine. Isotope dilution HPLC–ESI+–MS/MS analysis of total proteolytic digests revealed a concentration-dependent formation of N-[2-(S-cysteinyl)ethyl]-N-[2-(guan-7-yl)ethyl]methylamine (Cys-N7G-EMA) conjugates, indicating that mechlorethamine cross-links cysteine thiols within proteins to N-7 positions of guanine in DNA." @default.
- W2054710060 created "2016-06-24" @default.
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- W2054710060 date "2011-04-29" @default.
- W2054710060 modified "2023-10-02" @default.
- W2054710060 title "Mechlorethamine-Induced DNA–Protein Cross-Linking in Human Fibrosarcoma (HT1080) Cells" @default.
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- W2054710060 doi "https://doi.org/10.1021/pr200042u" @default.
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