ELIZA

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343831 occurrences (No.54 in the rank) during 5 years in the PubMed. [no cache] 500 found

166) On the other hand, 4-NQO derivatives whose genotoxic mechanism involves reduction of the C-4 nitro group were strong inducers of the SOS response.

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PMID:24106140 DOI:10.1002/tox.21905

2015 Environmental toxicology

* Genotoxicity risk assessment of diversely substituted quinolines using the SOS chromotest.

- Quinolines are aromatic nitrogen compounds with wide therapeutic potential to treat parasitic and microbial diseases. In this study, the genotoxicity of quinoline, 4-methylquinoline, 4-nitroquinoline-1-oxide (4-NQO), and diversely functionalized quinoline derivatives and the influence of the substituents (functional groups and/or atoms) on their genotoxicity were tested using the SOS chromotest. Quinoline derivatives that induce genotoxicity by the formation of an enamine epoxide structure did not induce the SOS response in Escherichia coli PQ37 cells, with the exception of 4-methylquinoline that was weakly genotoxic. The chemical nature of the substitution (C-5 to C-8: hydroxyl, nitro, methyl, isopropyl, chlorine, fluorine, and iodine atoms; C-2: phenyl and 3,4-methylenedioxyphenyl rings) of quinoline skeleton did not significantly modify compound genotoxicities; however, C-2 substitution with α-, β-, or γ-pyridinyl groups removed 4-methylquinoline genotoxicity. On the other hand, 4-NQO derivatives whose genotoxic mechanism involves reduction of the C-4 nitro group were strong inducers of the SOS response. Methyl and nitrophenyl substituents at C-2 of 4-NQO core affected the genotoxic potency of this molecule. The relevance of these results is discussed in relation to the potential use of the substituted quinolines. The work showed the sensitivity of SOS chromotest for studying structure-genotoxicity relationships and bioassay-guided quinoline synthesis.

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(1)146 to	(14)4 proteins	(27)3 time	(40)2 following
(2)32 null	(15)4 rates	(28)3 times	(41)2 from
(3)31 and	(16)4 that	(29)3 which	(42)2 including
(4)22 of	(17)4 the	(30)2 (ABR)	(43)2 latency
(5)21 rate	(18)3 at	(31)2 (DDR)	(44)2 mediated
(6)14 was	(19)3 during	(32)2 (UPR)	(45)2 or
(7)13 in	(20)3 elements	(33)2 after	(46)2 rate)
(8)8 selection	(21)3 models	(34)2 are	(47)2 rates,
(9)7 surface	(22)3 options	(35)2 boundaries	(48)2 such
(10)6 data	(23)3 properties	(36)2 delays	(49)2 theory
(11)6 is	(24)3 strategies	(37)2 effects	(50)2 validity
(12)4 for	(25)3 style	(38)2 element	(51)2 were
(13)4 patterns	(26)3 suppression	(39)2 evaluation

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--- WordNet output for response --- =>反応, 応答, 返答, 返報, 反響, 答唱句 Overview of noun response The noun response has 7 senses (first 5 from tagged texts) 1. (11) response -- (a result; "this situation developed in response to events in Africa") 2. (11) reaction, response -- (a bodily process occurring due to the effect of some antecedent stimulus or agent; "a bad reaction to the medicine"; "his responses have slowed with age") 3. (6) answer, reply, response -- (a statement (either spoken or written) that is made to reply to a question or request or criticism or accusation; "I waited several days for his answer"; "he wrote replies to several of his critics") 4. (4) reception, response -- (the manner in which something is greeted; "she did not expect the cold reception she received from her superiors") 5. (1) response -- (a phrase recited or sung by the congregation following a versicle by the priest or minister) 6. reply, response -- (the speech act of continuing a conversational exchange; "he growled his reply") 7. response -- (the manner in which an electrical or mechanical device responds to an input signal or a range of input signals) --- WordNet end ---