TY  - JOUR
A1  - Lutz, Werner K.
A1  - Schlatter, C.
T1  - In vivo covalent binding of chemicals to DNA as a short-term test for carcinogenicity
N2  - The determination of a covalent binding of radioactive chemieals to DNA in intact mammalian organisms is proposedas a short-term test for carcinogenicity. The effectiveness of covalent binding to rat liver DNA correlates well with the hepatocarcinogenicity known from long-term bioassays. The binding indices range over more than five orders of rriagnitude between the strongest hepatocarcinogen aflatoxin B 1 and the limit of detection of a binding with 100 f-LCi 14C-labelled chemical. The order of magnitude of binding is therefore a surprisingly good quantitative measure for carcinogenicity. The pattern of DNA binding sites is important especially for small alkylating agents where the determination of total binding might indicate a higher carcinogenic potency than is actually observed.
KW  - DNA
KW  - DNA-Binding
KW  - Carcinogen
KW  - Short-term Carcinogenicity Test
KW  - Aflatoxin
KW  - Toluene
KW  - Tritiated Water
Y1  - 1979
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-80127
ER  - 
TY  - JOUR
A1  - Caviezel, M.
A1  - Aeschbach, A. P.
A1  - Lutz, Werner K.
A1  - Schlatter, C.
T1  - Reduction of covalent binding of aflatoxin B1 to rabbit liver DNA after immunization against this carcinogen
N2  - The covalent binding of [3H]aflatoxin B1 (AF) to liver DNA was determined, 6 h after oral administration to male rabbits. A Covalent Binding Index, CBI (flmol AF/mol DNA-P)/(mmol AF/kg b. w.) = 8,500 was found. Pretreatment of rabbits with AF coupled to bovine serum albumin in Freund's adjuvant led to the production of AF-directed antibodies. Administration of [3H]AF to such immunized rabbits resulted in a CJH of only 2,500, i.e., the iiDJ{.lUnization provided a protection by a factor of more than 3. Although this is encouraging evidence for the potential of active immunization against genotoxic carcinogens, a nurober of pointswill have to be clarified, such as the time course for the DNA binding and the question of a possible shift to other target cells.
KW  - Krebs
KW  - DNA
KW  - Aflatoxin
KW  - Cancer prevention
KW  - Carcinogen
KW  - Covalent binding
KW  - DNA
KW  - Immunization
Y1  - 1984
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-80116
ER  -