Cross-reactivity of thirteen monoclonal antibodies with ten vaccinia cDNA expressed rat, mouse and human cytochrome P450s.
Twelve monoclonal antibodies (MAbs) to rat cytochrome P450s and one MAb to a scup (fish) P450 have been isolated, characterized, and are currently in common use. Expression of cDNAs for different P450s from a vaccinia vector offers a rapid and simple way toward the production of individual P450s. The thirteen MAbs were examined for their cross-reactivity with ten cDNA expressed human, rat, and mouse P450s. Three MAbs to rat 1A1 and fish 1A1 cross-reacted with cDNA expressed mouse 1A1. One of the latter MAbs, 1-7-1 but none of the others cross-reacted with mouse 1A2. Surprisingly, the fish MAb to 1A1 also cross-reacted with human 2E1. Two MAbs to rat 2B1/2B2 cross-reacted with rat 2A1. An MAb to rat 2C11 cross-reacted with human 2C9. Two MAbs to rat 2E1 cross-reacted with human 2E1. Finally, two MAbs to rat 3A1 cross-reacted strongly with human 3A4. These studies open the door to constructing a library of MAbs with defined binding activity to the P450s of human and other species.
Laboratory of Molecular Carcinogenesis, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892.
I
I
Goldfarb
K
K
Korzekwa
K W
KW
Krausz
F
F
Gonzalez
H V
HV
Gelboin
D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology* / Q000302:isolation & purification; D003429:Cross Reactions; D003577:Cytochrome P-450 Enzyme System / Q000096:biosynthesis / Q000235:genetics / Q000276:immunology*; D004279:DNA, Viral / Q000276:immunology* / Q000378:metabolism; D005399:Fishes; D005822:Genetic Vectors; D006801:Humans; D051379:Mice; D051381:Rats; D014616:Vaccinia virus / Q000235:genetics*
D000911:Antibodies, Monoclonal; D004279:DNA, Viral; D003577:Cytochrome P-450 Enzyme System