- A Nitroalkene Benzoic Acid Derivative Targets Reactive Microglia and Prolongs Survival in an Inherited Model of ALS via NF-κB Inhibition
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Motor neuron degeneration and neuroinflammation are the most striking pathological features of amyotrophic lateral sclerosis (ALS). ALS currently has no cure and approved drugs have only a modest clinically therapeutic effect in patients. Drugs targeting
- Ibarburu, Sofía,Kovacs, Mariángeles,Varela, Valentina,Rodríguez-Duarte, Jorge,Ingold, Mariana,Invernizzi, Paulina,Porcal, Williams,Arévalo, Ana Paula,Perelmuter, Karen,Bollati-Fogolín, Mariela,Escande, Carlos,López, Gloria V.,King, Peter,Si, Ying,Kwon, Yuri,Batthyány, Carlos,Barbeito, Luis,Trias, Emiliano
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Read Online
- Biological evaluation and SAR analysis of novel covalent inhibitors against fructose-1,6-bisphosphatase
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Fructose-1,6-bisphosphatase (FBPase) is an attractive target for affecting the GNG pathway. In our previous study, the C128 site of FBPase has been identified as a new allosteric site, where several nitrovinyl compounds can bind to inhibit FBPase activity. Herein, a series of nitrostyrene derivatives were further synthesized, and their inhibitory activities against FBPase were investigated in vitro. Most of the prepared nitrostyrene compounds exhibit potent FBPase inhibition (IC50 3, CF3, OH, COOH, or 2-nitrovinyl were installed at the R2 (meta-) position of the benzene ring, the FBPase inhibitory activities of the resulting compounds increased 4.5–55 folds compared to those compounds with the same groups at the R1 (para-) position. In addition, the preferred substituents at the R3 position were Cl or Br, thus compound HS36 exhibited the most potent inhibitory activity (IC50 = 0.15 μM). The molecular docking and site-directed mutation suggest that C128 and N125 are essential for the binding of HS36 and FBPase, which is consistent with the C128-N125-S123 allosteric inhibition mechanism. The reaction enthalpy calculations show that the order of the reactions of compounds with thiol groups at the R3 position is Cl > H > CH3. CoMSIA analysis is consistent with our proposed binding mode. The effect of compounds HS12 and HS36 on glucose production in primary mouse hepatocytes were further evaluated, showing that the inhibition was 71% and 41% at 100 μM, respectively.
- Chen, Haifeng,Guo, Yanrong,Han, Xinya,Hu, Wei,Huang, Yunyuan,Ren, Yanliang,Tang, Zilong,Wang, Qi,Wei, Lin,Xia, Qinfei,Yan, Jufen
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supporting information
(2020/07/23)
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- NITROALKENE NON STEROIDAL ANTI-INFLAMMATORY DRUGS (NA-NSAIDS) AND METHODS OF TREATING INFLAMMATION RELATED CONDITIONS
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Nitroalkene non-steroidal anti-inflammatory compounds, pharmaceutical compositions thereof, and methods of treating inflammation related conditions.
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Paragraph 0083-0085
(2019/07/17)
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- Carboxylate Salt Bridge-Mediated Enamine Catalysis: Expanded Michael Reaction Substrate Scope and Facile Access to Antidepressant (R)-Pristiq
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We report broad guidance on how to catalyze enantioselective aldehyde additions to nitroalkene or maleimide Michael electrophiles in the presence of unprotected acidic spectator groups, e.g., carboxylic acids, acetamides, phenols, catechols, and maleimide
- Nugent, Thomas C.,Hussein, Hussein Ali El Damrany,Ahmed, Shahzad,Najafian, Foad Tehrani,Hussain, Ishtiaq,Georgiev, Tony,Aljoumhawy, Mahmoud Khalaf
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supporting information
p. 2824 - 2831
(2017/08/23)
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- Synthesis and biological evaluation of novel inhibitors against 1,3,8-trihydroxynaphthalene reductase from Magnaporthe grisea
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1,3,8-Trihydroxynaphthalene reductase (3HNR) is an essential enzymes that is involved in fungal melanin biosynthesis. Based on the structural informations of active site of 3HNR, a series of β-nitrostyrene compounds were rationally designed and synthesized. The enzymatic activities of these compounds showed that most of them exhibited high inhibitory activities (50 = 0.29 μM). In particular, some of these compounds had moderate fungicidal activity against Magnaporthe grisea. Compound 3-4 showed high in vivo activities against M. grisea (EC50 = 9.5 ppm). Furthermore, compound 3-2 was selected as a representative molecule, and the probable binding mode of this compound and the surrounding residues in the active site of 3HNR was elucidated by using molecular dock. The positive results suggest that β-nitrostyrene derivatives are most likely to be promising leads toward the discovery of novel agent of rice blast.
- Chen, Haifeng,Han, Xinya,Qin, Nian,Wei, Lin,Yang, Yue,Rao, Li,Chi, Bo,Feng, Lingling,Ren, Yanliang,Wan, Jian
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p. 1225 - 1230
(2016/03/01)
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- S-nitrosylation and attenuation of excessive calcium flux by pentacycloundecane derivatives
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A novel series of polycyclic amines, containing nitrogen monoxide donating moieties, were synthesised and tested for calcium channel and N-methyl-D-aspartate receptor modulating activity. The synthesised compounds were classified into two groups, based on their nitrogen monoxide donating moieties: unsaturated nitro compounds (1, 2 and 3) and nitro esters, or nitrates (4, 5 and 6). The nitrates were obtained via the reaction of hydroxyl functionalities with thionylchloride nitrate. All of the compounds synthesised exhibited significant (p 0.01) S-nitrosylation capacity. The calcium channel activity of the polycyclic amines was evaluated using a KCl mediated fluorescent calcium flux assay. All the compounds exhibited better calcium channel antagonism than the lead structure, NGP1-01, with compound 1 exhibiting calcium channel blockade comparable to the commercially available nimodipine at concentrations of 10 μM and 1 μM. Compounds 3 and 4 inhibited calcium flux to these levels at 10 μM concentrations. NMDA/glycine mediated N-methyl-Daspartate receptor (NMDAR) calcium influx inhibition was evaluated at a 100 μM concentration using a fluorescent calcium flux assay. All the compounds exhibited NMDAR antagonism with compounds 1 (25.4 %), 2 (20.24 %), 3 (33.14 %) and 6 (24.55 %) showing the most significant NMDAR inhibitory activity (p 0.01). No clear correlation was observed between the S-nitrosylation capabilities of the compounds and their calcium channel activity or NMDAR channel antagonism, indicating that other factors probably play a more decisive role in the mechanism of pentacycloundecylamine channel modulation. This could include the geometric and steric bulk considerations that have been described to contribute to the channel activities of the pentacycloundecylamines. All the compounds synthesised exhibited promising calcium channel and NMDAR channel inhibitory activity and show promise as potential lead compounds for drug development against neurodegeneration.
- Lemmer, Hendrik J.R.,Joubert, Jacques,Van Dyk, Sandra,Van Der Westhuizen, Francois H.,Malan, Sarel F.
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experimental part
p. 361 - 371
(2012/10/07)
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