Abstract:
:New resveratrol (trans-3,4',5-trihydroxystilbene) analogs were synthesized and screened for their in vitro cancer chemopreventive potential using various bioassays relevant for the prevention of carcinogenesis in humans: two assays to detect modulators of carcinogen metabolism (Cyp1A inhibition; determination of NAD(P)H/quinone reductase (QR) activity), three assays to identify radical scavenging and antioxidant properties (DPPH, ORAC, superoxide anion radicals in differentiated HL-60 cells), four assays to determine anti-inflammatory and anti-hormonal effects (iNOS, Cox-1 and aromatase inhibition, anti-estrogenic potential). 3,4',5-Tri-O-methyl resveratrol 1a was about sevenfold more active than resveratrol in inhibiting Cyp1A activity, it was a potent inducer of QR activity, and it showed pure anti-estrogenic activity (whereas resveratrol is a known mixed estrogen (ant)agonist with both estrogenic and anti-estrogenic properties). Dual estrogen ant-/agonist activity was restored in the mono-O-benzyl-substituted derivatives 4b (4'-O-benzyl resveratrol) and 5b (3-O-benzyl resveratrol). With respect to aromatase inhibition (Cyp19), which provided the highest number of actives, the benzyl-substituted series was more potent than the methyl-substituted derivatives of resveratrol, and 3-O-benzyl resveratrol 5b was about eightfold more active than resveratrol. Overall, 3,4',5-tri-O-pivaloyl resveratrol oxide 7c was identified as a potent inducer of phase 2 enzymes concomitant with inhibition of LPS-mediated iNOS induction.
journal_name
Arch Pharm (Weinheim)journal_title
Archiv der Pharmazieauthors
Orsini F,Verotta L,Klimo K,Gerhäuser Cdoi
10.1002/ardp.201600022subject
Has Abstractpub_date
2016-06-01 00:00:00pages
414-27issue
6eissn
0365-6233issn
1521-4184journal_volume
349pub_type
杂志文章abstract::The new chemical entities febuxostat and topiroxostat have been approved by the US Food and Drug Administration, opening new avenues for exploiting different heterocycles other than purines as xanthine oxidase (XO) inhibitors. A different series of substituted 2-benzamido-4-methylthiazole-5-carboxylic acid derivatives...
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journal_title:Archiv der Pharmazie
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更新日期:1998-07-01 00:00:00
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abstract::A new class of acetamidomethylsulfonyl bis heterocycles-oxazolyl-1,3,4-oxadiazoles, -thiazolyl-1,3,4-oxadiazoles, and -imidazolyl-1,3,4-oxadiazoles were synthesized from the synthetic intermediates, methyl 2-((4-aryloxazol-2-ylcarbamoyl)methylsulfonyl)acetate, methyl 2-((4-arylthiazol-2-ylcarbamoyl)methylsulfonyl)acet...
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