Display Settings:


Send to:

Choose Destination
See comment in PubMed Commons below
Immunol Lett. 1997 Jul;58(2):69-74.

Reactive oxygen species modified thymine and poly(dT) present unique epitope for human anti-DNA autoantibodies.

Author information

  • 1Department of Biochemistry, Faculty of Medicine, Aligarh Muslim University, India.


Hydroxyl radical, one of the most potent of all reactive oxygen species has been implicated in many human degenerative diseases and is known to modify adenine and thymine in cellular DNA. In the present studies, adenine, thymine and their synthetic homopolymers poly(dA), poly(dT) were ROS-modified and subsequently used as inhibitors of native DNA binding to human anti-DNA autoantibodies. Besides nDNA, modified thymine and poly(dT) were effective inhibitors of DNA-anti-DNA antibody interaction. The relative affinity of ROS-modified poly(dT) was better than that of native DNA. Visual detection of modified thymine and poly(dT) binding to affinity purified anti-DNA IgG by an indirect band shift assay support competition inhibition data. The enhanced recognition of ROS-DNA by anti-DNA autoantibodies, as reported earlier, could be due to the ROS-induced modification of thymine.

[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Icon for Elsevier Science
    Loading ...
    Write to the Help Desk