Abstract:
:Peroxynitrite (ONOO(-)) has been vastly implicated in mutagenesis and cancer development. Present study probes the antigenicity of peroxynitrite damaged DNA (ONOO(-)-DNA) in cancer patients. Purified human placental DNA was damaged by the synergistic action of sodium nitroprusside (SNP) and Pyrogallol for 3h at 37 degrees C. Binding characteristics of cancer autoantibodies as well as experimentally induced anti-peroxynitrite-DNA (anti-ONOO(-)-DNA) antibodies were assessed by ELISA and band shift assay. DNA modifications produced single strand breaks, decreased melting temperature (T(m)), hyperchromicity in UV spectrum and decreased fluorescence intensity. The ONOO(-)-DNA induced high titre antibodies in experimental animals. Cancer autoantibodies exhibited enhanced binding with the modified DNA as compared to the native form. Lymphocyte DNA from cancer patients showed appreciable recognition of anti-ONOO(-)-DNA IgG as compared to the DNA from healthy subjects. The peroxynitrite modified DNA presents unique epitopes which may be one of the factors for the autoantibody induction in cancer patients.
journal_name
Cell Immunoljournal_title
Cellular immunologyauthors
Habib S,Moinuddin,Ali A,Ali Rdoi
10.1016/j.cellimm.2008.08.002subject
Has Abstractpub_date
2009-01-01 00:00:00pages
117-23issue
2eissn
0008-8749issn
1090-2163pii
S0008-8749(08)00154-8journal_volume
254pub_type
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journal_title:Cellular immunology
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journal_title:Cellular immunology
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journal_title:Cellular immunology
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pub_type: 杂志文章
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journal_title:Cellular immunology
pub_type: 杂志文章
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