[Effects of 5-bromouracil and 5-bromodeoxyuridine in combination with 8-aza-adenine on the UV sensitivity of bacteria].
The presence of 5-bromouracil (BU) as well as 5-bromo-2-deoxyuridine (BUdR) in the cultivation media of bacteria results in the distinct increase of UV sensitivity. With the nucleic acid base analogue 8-azaadenine (8-AA) a similar effect was confirmed, however, not so pronounced. In the experiments reported here the combined action of BU or BUdR and 8-AA on Escherichia coli, Proteus mirabilis, Bacillus subtilis and Bacillus cereus was investigated. The sensitization effect of BUdR does not increase if 8-AA is present additionally during cultivation. On the contrary, a decrease of sensibilization occurs. This result may be caused by the protective effect of the adenine derivative against UV irradiation, if it is present in the cell, but not incorporated into the DNA.
D000225:Adenine / Q000031:analogs & derivatives* / Q000494:pharmacology; D001409:Bacillus cereus / Q000187:drug effects / Q000528:radiation effects; D001412:Bacillus subtilis / Q000187:drug effects / Q000528:radiation effects; D001419:Bacteria / Q000187:drug effects* / Q000528:radiation effects; D001973:Bromodeoxyuridine / Q000494:pharmacology*; D001976:Bromouracil / Q000494:pharmacology*; D004926:Escherichia coli / Q000187:drug effects / Q000528:radiation effects; D011513:Proteus mirabilis / Q000187:drug effects / Q000528:radiation effects; D011836:Radiation Tolerance; D011838:Radiation-Sensitizing Agents / Q000494:pharmacology*; D014466:Ultraviolet Rays
D011838:Radiation-Sensitizing Agents; D001976:Bromouracil; D001973:Bromodeoxyuridine; D000225:Adenine; C006654:8-azaadenine
Wirkungen von 5-Bromuracil und 5-Bromdesoxyuridin in Kombination mit 8-Azaadenin auf die UV-Empfindlichkeit von Bakterien.