title: Ultrasensitive enzymatic radioimmunoassay (USERIA) detects femtomoles of acetylaminofluorene-DNA adducts.
abstract: USERIA is a modification of radioimmunoassay and enzyme-liked immunosorbent assay. When compared to these assays, USERIA is 60- and 10-fold, respectively, more sensitive for the detection of adducts in DNA modified by the chemical carcinogen, 2-acetylaminofluorene (AAF). The specific antigen-antibody reaction is enzymatically amplified by an anti-IgG alkaline phosphatase conjugate which converts the substrate, [3H]adenosine-5'-monophosphate, to [3H]adenosine. As few as 2 fmol of AAF-DNA adducts can be detected by a competitive USERIA assay and less than 3 fmol of the specific adduct, N-(deoxyguanosine-8-yl)-AAF, can be detected using a non-competitive USERIA approach. The sensitivity of USERIA should aid efforts to measure carcinogen-DNA adducts in biological specimen samples from humans and experimental animals.
mesh_terms: D015073:2-Acetylaminofluorene / Q000031:analogs & derivatives* / Q000032:analysis; D004247:DNA / Q000032:analysis*; D004797:Enzyme-Linked Immunosorbent Assay; D007124:Immunoenzyme Techniques; D008832:Microchemistry; D011863:Radioimmunoassay / Q000379:methods*
chemical_list: D004247:DNA; D015073:2-Acetylaminofluorene