- Structure-Activity Relationships of cyclo(l -Tyrosyl- l -tyrosine) Derivatives Binding to Mycobacterium tuberculosis CYP121: Iodinated Analogues Promote Shift to High-Spin Adduct
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A series of analogues of cyclo(l-tyrosyl-l-tyrosine), the substrate of the Mycobacterium tuberculosis enzyme CYP121, have been synthesized and analyzed by UV-vis and electron paramagnetic resonance spectroscopy and by X-ray crystallography. The introduction of iodine substituents onto cyclo(l-tyrosyl-l-tyrosine) results in sub-μM binding affinity for the CYP121 enzyme and a complete shift to the high-spin state of the heme FeIII. The introduction of halogens that are able to interact with heme groups is thus a feasible approach to the development of next-generation, tight binding inhibitors of the CYP121 enzyme, in the search for novel antitubercular compounds.
- Rajput, Sunnia,McLean, Kirsty J.,Poddar, Harshwardhan,Selvam, Irwin R.,Nagalingam, Gayathri,Triccas, James A.,Levy, Colin W.,Munro, Andrew W.,Hutton, Craig A.
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supporting information
p. 9792 - 9805
(2019/11/13)
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- BENZOCYCLOBUTANE DERIVATIVES USEFUL AS DUAL SGLT1/SGLT2 MODULATORS
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The present invention is directed to benzocyclobutane derivatives, pharmaceutical compositions containing them and their use in the treatment of disorders and conditions modulated by SGLT activity, more particularly dual SGLT1/2 activity. More particularly, the compounds of the present invention are useful in the treatment of for example, Type II diabetes mellitus, Syndrome X, and complications and symptoms associated with said disorders.
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Page/Page column 103-106
(2018/05/27)
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- Exploration of phenylpropanoic acids as agonists of the free fatty acid receptor 4 (FFA4): Identification of an orally efficacious FFA4 agonist
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The long chain free fatty acid receptor 4 (FFA4/GPR120) has recently been recognized as lipid sensor playing important roles in nutrient sensing and inflammation and thus holds potential as a therapeutic target for type 2 diabetes and metabolic syndrome. To explore the effects of stimulating this receptor in animal models of metabolic disease, we initiated work to identify agonists with appropriate pharmacokinetic properties to support progression into in vivo studies. Extensive SAR studies of a series of phenylpropanoic acids led to the identification of compound 29, a FFA4 agonist which lowers plasma glucose in two preclinical models of type 2 diabetes.
- Sparks, Steven M.,Aquino, Christopher,Banker, Pierette,Collins, Jon L.,Cowan, David,Diaz, Caroline,Dock, Steven T.,Hertzog, Donald L.,Liang, Xi,Swiger, Erin D.,Yuen, Josephine,Chen, Grace,Jayawickreme, Channa,Moncol, David,Nystrom, Christopher,Rash, Vincent,Rimele, Thomas,Roller, Shane,Ross, Sean
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p. 1278 - 1283
(2017/06/19)
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- Effect of methyl substitution on the antioxidative property and genotoxicity of resveratrol
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Resveratrol (trans-3,4′,5-trihydroxystilbene) is a natural phytoalexin with various biological activities including inhibition of lipid peroxidation and free radical scavenging properties. In addition to its beneficial effects, resveratrol also has significant genotoxicity that leads to a high frequency of chromosome aberration together with micronucleus and sister chromatid exchanges. To enhance the radical scavenging activities and to reduce the genotoxicity of resveratrol, we designed 4′-methyl resveratrol analogues where a methyl group was introduced at the ortho position relative to the 4′-hydroxy group, which is responsible for both antioxidative activities and genotoxicity of resveratrol. These synthesized methyl analogues of resveratrol showed increased antioxidative activities against galvinoxyl radical as an oxyl radical species. Furthermore, the methyl analogues also surprisingly showed reduced in vitro genotoxicities, suggesting that methyl substitution may improve resveratrol efficacy.
- Fukuhara, Kiyoshi,Nakanishi, Ikuo,Matsuoka, Atsuko,Matsumura, Tomohiro,Honda, Sachiko,Hayashi, Mikiko,Ozawa, Toshihiko,Miyata, Naoki,Saito, Shinichi,Ikota, Nobuo,Okuda, Haruhiro
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p. 282 - 287
(2008/12/22)
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- Understanding the cardioprotective effects of flavonols: Discovery of relaxant flavonols without antioxidant activity
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3′,4′-Dihydroxyflavonol (DiOHF) is a cardioprotective flavonol that can reduce injury after myocardial ischemia and reperfusion and thus is a promising small molecule for the treatment of cardiovascular disease. Like all vasoactive flavonols reported to date, DiOHF is both relaxant and antioxidant, hindering investigation of the relative contribution of each activity for the prevention of reperfusion injury. This study investigates structure-activity relationships of variations at the 3′ and 4′ positions of the B ring of DiOHF and vasorelaxant and antioxidant activities. Relaxation of rat isolated aortic rings precontracted with KCl revealed that the most active flavonols were those with a 4′-hydroxyl group, with the opening of potassium channels as a possible contributing mechanism. For the antioxidant activity, with the exception of DiOHF, none of the flavonols investigated were able to significantly scavenge superoxide radical, and none of the three most potent vasorelaxant flavonols could prevent oxidant-induced endothelial dysfunction. The discovery of single-acting vasorelaxant flavonols without antioxidant activity, in particular 4′-hydroxy-3′-methoxyflavonol, will assist in investigating the mechanism of flavonol-induced cardioprotection.
- Cheng, Xue Qin,Chen, Xingqiang,Hughes, Richard A.,Williams, Spencer J.,Woodman, Owen L.
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p. 1874 - 1884
(2008/12/21)
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- Intracellular trapping of cyclosal-pronucleotides by enzymatic cleavage
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A new synthesis for cycloSal-pronucleotides bearing enzymatically cleavable triggers is presented. This trigger is introduced to trap the pronucleotide inside cells. The general concept and hydrolysis data in different media are discussed. Copyright Taylo
- Jessen,Tonn,Meier
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p. 827 - 830
(2008/03/27)
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- AMIDE COMPOUND AND USE OF THE SAME
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PROBLEM TO BE SOLVED: To provide a compound having an excellent controlling effect against plant pests. SOLUTION: This amide compound expressed by formula (1) [wherein, R1 is H, a halogen atom, a 1-4C alkyl or the like; R2 is a 1-4C alkyl, a 1-4C haloalkyl or the like; R3 is H or a 1-3C alkyl; R4 is a halogen, a 1-4C alkylthio, a 2-5C alkylcarbonyloxy or the like; R5 is a 3-4C alkynyl; and X is O or S] has the excellent controlling effect against the plant pests. COPYRIGHT: (C)2006,JPOandNCIPI
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Page/Page column 52
(2010/02/14)
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- Novel thieno oxazine analogues as antihyperglycemic and lipid modulating agents
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A series of phenyl acetic acid and α-hydroxy propionic acid derivatives were synthesized. In vivo studies of the compounds indicated compound 2c as the most potent in one of the series, which has both glucose and lipid lowering properties. The syntheses and biological studies have been discussed.
- Das, Saibal Kumar,Reddy, K. Anantha,Abbineni, Chandrasekhar,Iqbal, Javed,Suresh,Premkumar,Chakrabarti, Ranjan
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p. 399 - 403
(2007/10/03)
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