PMID- 9797125 OWN - NLM STAT- MEDLINE DCOM- 19981110 LR - 20190708 IS - 0020-7136 (Print) IS - 0020-7136 (Linking) VI - 78 IP - 4 DP - 1998 Nov 9 TI - Binding of human anti-DNA autoantibodies to reactive oxygen species modified-DNA and probing oxidative DNA damage in cancer using monoclonal antibody. PG - 404-9 AB - The binding of native and reactive oxygen species-modified DNA (ROS-DNA) to circulating antibodies in the serum of patients with various types of cancer has been investigated by competition enzyme-linked immunosorbent assay. Fifteen sera of 35 showed reactivity with native and/or ROS-DNA. Eleven of these showed higher binding to ROS-DNA (36-64% inhibition), whereas 1 showed higher reactivity with native DNA (nDNA) (42% inhibition). Three sera reacted with both native and ROS-DNA almost equally. Oxidative lesions in human genomic DNA were immunochemically detected using an anti-ROS-DNA monoclonal antibody (MAb) probe. Two of 3 DNA isolates from blood of breast cancer patients, 1 of 3 from lung cancer and 1 of 2 each from hepatocellular cancer and cancer of the gallbladder were reactive with the MAb. Higher recognition of ROS-DNA by circulating antibodies and DNA isolated from cancer patients by the MAb indicates increased oxidative stress leading to DNA damage. Our results suggest that ROS modification of DNA probably alters its immunogenicity leading to the generation of antibodies to ROS-DNA, probably by the activation of autoreactive cells. The induced antibodies against modified DNA are cross-reactive to native DNA. FAU - Ashok, B T AU - Ashok BT AD - Department of Biochemistry, Faculty of Medicine, Aligarh Muslim University, India. FAU - Ali, R AU - Ali R LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Int J Cancer JT - International journal of cancer JID - 0042124 RN - 0 (Antibodies, Antinuclear) RN - 0 (Antibodies, Monoclonal) RN - 0 (Antibodies, Neoplasm) RN - 0 (Biomarkers, Tumor) RN - 0 (DNA, Neoplasm) RN - 0 (Epitopes) RN - 0 (Reactive Oxygen Species) SB - IM MH - Adult MH - Antibodies, Antinuclear/blood/*immunology MH - Antibodies, Monoclonal/immunology MH - Antibodies, Neoplasm/blood/*immunology MH - Antibody Specificity MH - Biomarkers, Tumor/immunology MH - *DNA Damage MH - DNA, Neoplasm/immunology/*metabolism MH - Epitopes/immunology MH - Humans MH - Middle Aged MH - Neoplasms/blood/*genetics/*immunology MH - Oxidative Stress MH - Prognosis MH - Reactive Oxygen Species/*immunology EDAT- 1998/10/31 03:04 MHDA- 2000/06/20 09:00 CRDT- 1998/10/31 03:04 PHST- 1998/10/31 03:04 [pubmed] PHST- 2000/06/20 09:00 [medline] PHST- 1998/10/31 03:04 [entrez] AID - 10.1002/(SICI)1097-0215(19981109)78:4<404::AID-IJC2>3.0.CO;2-Y [pii] AID - 10.1002/(sici)1097-0215(19981109)78:4<404::aid-ijc2>3.0.co;2-y [doi] PST - ppublish SO - Int J Cancer. 1998 Nov 9;78(4):404-9. doi: 10.1002/(sici)1097-0215(19981109)78:4<404::aid-ijc2>3.0.co;2-y.