Synthesis and DNA-sequence selectivity of a series of mono- and difunctional 9-aminoacridine nitrogen mustards
摘要:
The aim of this work was to identify nitrogen mustards that would react selectively with DNA, particularly in G-rich regions. A sei ies of mono- and difunctional nitrogen mustards was synthesized in which the (2-chloroethyl)amino functions were connected to the N-9 of 9-aminoacridine by way of a spacer chain consisting of two to six methylene units. The length of the spacer chain connecting the alkylating and putative DNA-intercalating groups was found to affect the preference for the alkylation of different guanine-N-7 positions in a DNA sequence. All of the compounds reacted preferentially at G's that are followed by G as do most other types of nitrogen mustards, but the degree of selectivity was greater. The compounds reacted at much lower concentrations than were required for comparable reaction by mechlorethamine (HN2), consistent with initial noncovalent binding to DNA prior to guanine-N-7 alkylation. The degree of DNA-sequence selectivity increased as the spacer-chain length decreased below four methylene units. Most strikingly, long spacer compounds reacted strongly at 5'-GT-3' sequences, Whereas this reaction was almost completely suppressed when-the spacer length was reduced to two or three methylenes. Mono- and difunctional compounds of a given spacer length showed no consistent difference in DNA-sequence preference.
Synthesis and DNA-sequence selectivity of a series of mono- and difunctional 9-aminoacridine nitrogen mustards
摘要:
The aim of this work was to identify nitrogen mustards that would react selectively with DNA, particularly in G-rich regions. A sei ies of mono- and difunctional nitrogen mustards was synthesized in which the (2-chloroethyl)amino functions were connected to the N-9 of 9-aminoacridine by way of a spacer chain consisting of two to six methylene units. The length of the spacer chain connecting the alkylating and putative DNA-intercalating groups was found to affect the preference for the alkylation of different guanine-N-7 positions in a DNA sequence. All of the compounds reacted preferentially at G's that are followed by G as do most other types of nitrogen mustards, but the degree of selectivity was greater. The compounds reacted at much lower concentrations than were required for comparable reaction by mechlorethamine (HN2), consistent with initial noncovalent binding to DNA prior to guanine-N-7 alkylation. The degree of DNA-sequence selectivity increased as the spacer-chain length decreased below four methylene units. Most strikingly, long spacer compounds reacted strongly at 5'-GT-3' sequences, Whereas this reaction was almost completely suppressed when-the spacer length was reduced to two or three methylenes. Mono- and difunctional compounds of a given spacer length showed no consistent difference in DNA-sequence preference.
Compounds of the formula ##STR1## or a non-toxic acid addition salt thereof wherein R.sub.1 is alkyl of from 1 to 20 carbon atoms; R.sub.2 is alkyl of from 12 to 20 carbon atoms; R.sub.3 is selected from the group consisting of hydrogen and hydroxyalkyl of from 2 to 8 carbon atoms; and R.sub.4 is selected from the group consisting of hydrogen, alkyl of from 1 to 8 carbon atoms and hydroxyalkyl of from 2 to 8 carbon atoms, said compounds are useful for combating viral infections in vertebrate animals.
Treating blood or blood products with compounds which have a mustard, aziridinium or aziridine group and a nucleic acid binding group
申请人:Cerus Corporation
公开号:US20020182581A1
公开(公告)日:2002-12-05
Methods and compositions for treating pathogens in material are described, including methods of decontaminating human fluids prior to processing in the clinical laboratory and methods for decontaminating blood products prior to in vivo use. The techniques handle large volumes of human serum without impairing the testing results. Novel compounds for photodecontaminating biological material are also contemplated which are compatible with clinical testing, in that they do not interfere with serum analytes.