Category: imidazoles-derivatives

Ye, Chao; Zheng, Fen; Xu, Tao; Wu, Nan; Tong, Ying; Xiong, Xiao-Qing; Zhou, Ye-Bo; Wang, Jue-Jin; Chen, Qi; Li, Yue-Hua; Zhu, Guo-Qing; Han, Ying published the artcile< Norepinephrine acting on adventitial fibroblasts stimulates vascular smooth muscle cell proliferation via promoting small extracellular vesicle release>, Application In Synthesis of 6823-69-4, the main research area is vascular smooth muscle cell proliferation fibroblast extracellular vesicle norepinephrine; adventitial fibroblasts; angiotensin converting enzyme; extracellular vesicle; hypertension; norepinephrine; vascular smooth muscle cell.

Excessive sympathetic activity and norepinephrine (NE) release play crucial roles in the pathogeneses of hypertension. Sympathetic fibers innervate adventitia rather than media of arteries. However, the roles of NE in adventitial fibroblasts (AFs) are unknown. This study investigated the roles of NE in regulating AFs-derived extracellular vesicles (EVs) release and vascular smooth muscle cells (VSMCs) proliferation in hypertension. AFs and VSMCs were prepared from aorta of Wistar-Kyoto rats (WKY) and spontaneously hypertensive rats (SHR). AFs were treated with NE (10μM) for 24 h (every 6 h, 4 times), and cultured in exosomes-depleted medium for 48 h. EVs were isolated from AFs medium with ultracentrifugation for identification and transfer to VSMCs. NE promoted AFs phenotypic transformation and proliferation, which were prevented by α-receptor antagonist phentolamine rather than β-receptor antagonist propranolol. NE-treated AFs conditioned medium stimulated VSMCs proliferation, which was inhibited by either exosome inhibitor GW4869 or phentolamine. NE increased small EVs number, diameter and angiotensin converting enzyme (ACE) contents. The NE-induced EVs release was abolished by GW4869. The EVs from NE-treated AFs stimulated VSMCs proliferation, which was prevented by angiotensin II type 1 receptor antagonist losartan. The EVs from the ACE knockdown-treated AFs showed lower ACE contents, and lost their roles in stimulating VSMCs proliferation. NE promotes AFs-derived small EVs release and ACE transfer, and then causes VSMCs proliferation in hypertension. Intervention of AFs-derived EVs release may be potential therapeutics for excessive sympathetic activation-related vascular remodeling in hypertension.

Theranostics published new progress about Angiotensin AT1 receptors Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 6823-69-4 belongs to class imidazoles-derivatives, and the molecular formula is C30H30Cl2N6O2, Application In Synthesis of 6823-69-4.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Pezo, Valerie; Jaziri, Faten; Bourguignon, Pierre-Yves; Louis, Dominique; Jacobs-Sera, Deborah; Rozenski, Jef; Pochet, Sylvie; Herdewijn, Piet; Hatfull, Graham F.; Kaminski, Pierre-Alexandre; Marliere, Philippe published the artcile< Noncanonical DNA polymerization by aminoadenine-based siphoviruses>, HPLC of Formula: 452-06-2, the main research area is noncanonical DNA polymerization aminoadenine siphovirus bacteriophage mol evolution.

Bacteriophage genomes harbor the broadest chem. diversity of nucleobases across all life forms. Certain DNA viruses that infect hosts as diverse as cyanobacteria, proteobacteria, and actinobacteria exhibit wholesale substitution of aminoadenine for adenine, thereby forming three hydrogen bonds with thymine and violating Watson-Crick pairing rules. Aminoadenine-encoded DNA polymerases, homologous to the Klenow fragment of bacterial DNA polymerase I that includes 3′-exonuclease but lacks 5′-exonuclease, were found to preferentially select for aminoadenine instead of adenine in deoxynucleoside triphosphate incorporation templated by thymine. Polymerase genes occur in synteny with genes for a biosynthesis enzyme that produces aminoadenine deoxynucleotides in a wide array of Siphoviridae bacteriophages. Congruent phylogenetic clustering of the polymerases and biosynthesis enzymes suggests that aminoadenine has propagated in DNA alongside adenine since archaic stages of evolution.

Science (Washington, DC, United States) published new progress about Bacteriophage. 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, HPLC of Formula: 452-06-2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Bertini, Franco; Galli, Remo; Minisci, Francesco; Porta, Ombretta published the artcile< Free radical reactivity of the imidazole ring>, Reference of 36947-69-0, the main research area is imidazole alkylation; benzimidazole alkylation; free radial alkylation; imidazole carbamoylation.

Treating imidazole (I, R = H) by an aqueous Ag-catalyzed peroxydisulfate-decarboxylation of carboxylic acids gave 80-8% I (R = iso-Pr, tert-Bu). Similarly prepared were 50-93% II (R = Pr, iso-Pr, tert-Bu, cyclohexyl, PhOCH2) and 78% III (R = iso-Pr). II (R = H) with HCONH2 and aqueous tert-BuOOH-Fe2+ gave 60% II (R = CONH2).

Chimica e l’Industria (Milan, Italy) published new progress about Alkylation. 36947-69-0 belongs to class imidazoles-derivatives, and the molecular formula is C7H12N2, Reference of 36947-69-0.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Perchacz, Magdalena; Matejka, Libor; Konefal, Rafal; Seixas, Leandro; Livi, Sebastien; Baudoux, Jerome; Benes, Hynek; Donato, Ricardo K. published the artcile< Self-Catalyzed Coupling between Bronsted-Acidic Imidazolium Salts and Epoxy-Based Materials: A Theoretical/Experimental Study>, Related Products of 700370-07-6, the main research area is self catalysis Bronsted acidic imidazolium salt epoxide coupling.

Herein we present a comprehensive study on the role of Bronsted-acidic imidazolium ionic liquids (ILs) and imidazolium salts promoting the reaction between carboxyl and epoxide groups in a controlled manner at solvent-free and mild conditions. ILs were evaluated toward their ability to self-catalyze reactions between carboxyl groups and epoxy rings. Thus, an epoxy model reactant denoted Ph glycidyl ether (PGE) was reacted with different ILs, and the reaction kinetics was followed by time-dependent FTIR spectroscopy. The resulting products were characterized by 1H NMR and MALDI-TOF, which also allowed a comprehensive investigation of the reaction mechanism by following the reaction intermediates formation. The detected intermediates were then evaluated by d. functional theory (DFT) simulations to calculate their energy profiles, revealing the preferred mechanism pathways. These mono-, bi-, and tetra-functionalized ILs (with carboxyl groups) acted as all-in-one reaction systems for materials synthesis or modification, with the potential of producing a broad range of epoxy based materials via metal catalyst-free coupling reactions. A solvent-free self-catalyzed platform for reactions with epoxy materials at mild temperatures based on Bronsted-acidic imidazolium salts.

ACS Sustainable Chemistry & Engineering published new progress about Carboxylic acids Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), PROC (Process), RACT (Reactant or Reagent), PREP (Preparation). 700370-07-6 belongs to class imidazoles-derivatives, and the molecular formula is C6H9ClN2O2, Related Products of 700370-07-6.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Ibanez, Francesc; Montesinos, Jorge; Area-Gomez, Estela; Guerri, Consuelo; Pascual, Maria published the artcile< Ethanol Induces Extracellular Vesicle Secretion by Altering Lipid Metabolism through the Mitochondria-Associated ER Membranes and Sphingomyelinases>, Computed Properties of 6823-69-4, the main research area is sphingomyelinase extracellular vesicle secretion lipid metabolism; alcohol; extracellular vesicles; lipid metabolism; microglia; mitochondria-associated ER membranes; neuroinflammation; phospholipids; sphingomyelinases.

Recent evidence pinpoints extracellular vesicles (EVs) as key players in intercellular communication. Given the importance of cholesterol and sphingomyelin in EV biol., and the relevance of mitochondria-associated endoplasmic reticulum membranes (MAMs) in cholesterol/sphingomyelin homeostasis, we evaluated if MAMs and sphingomyelinases (SMases) could participate in ethanol-induced EV release. EVs were isolated from the extracellular medium of BV2 microglia treated or not with ethanol (50 and 100 mM). Radioactive metabolic tracers combined with thin layer chromatog. were used as quant. methods to assay phospholipid transfer, SMase activity and cholesterol uptake/esterification. Inhibitors of SMase (desipramine and GW4869) and MAM (cyclosporin A) activities were also utilized. Our data show that ethanol increases the secretion and inflammatory mol. concentration of EVs. Ethanol also upregulates MAM activity and alters lipid metabolism by increasing cholesterol uptake, cholesterol esterification and SMase activity in microglia. Notably, the inhibition of either SMase or MAM activity prevented the ethanol-induced increase in EV secretion. Collectively, these results strongly support a lipid-driven mechanism, specifically via SMases and MAM, to explain the effect of ethanol on EV secretion in glial cells.

International Journal of Molecular Sciences published new progress about Endoplasmic reticulum. 6823-69-4 belongs to class imidazoles-derivatives, and the molecular formula is C30H30Cl2N6O2, Computed Properties of 6823-69-4.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Penn, Kyle R.; Anders, Evan J.; Lindsay, Vincent N. G. published the artcile< Expedient Synthesis of Bis(imidazolium) Dichloride Salts and Bis(NHC) Complexes from Imidazoles Using DMSO as a Key Polar Additive>, Related Products of 1003-21-0, the main research area is alkanediimidazolium salt preparation cyclometalation gold silver palladium chloride; palladium alkanebisimidazolylidene complex; silver alkanebisimidazolylidene complex preparation; gold alkanebisimidazolylidene complex preparation; imidazole condensation reaction alkanedichloride.

A general approach for the synthesis of bis(imidazolium) dichloride salts from imidazoles and dichloroalkanes is reported. Typical limitations of this reaction for the formation of methylene-bridged derivatives are addressed herein through the use of excess CH2Cl2 in the presence of DMSO as a polar cosolvent, significantly improving the conversion rates presumably via stabilization of the initial SN2 transition state. The method also is applicable to the formation of bis(pyridinium) dichloride salts from pyridine derivatives, and to the direct synthesis of metal-bis(NHC) complexes from imidazoles.

Organometallics published new progress about Carbene complexes Role: SPN (Synthetic Preparation), PREP (Preparation) (Pd, Ag and Au alkanebis(imidazolylidene) complexes). 1003-21-0 belongs to class imidazoles-derivatives, and the molecular formula is C4H5BrN2, Related Products of 1003-21-0.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Sleiman, Dona; Garcia, Pierre Simon; Lagune, Marion; Loc′h, Jerome; Haouz, Ahmed; Taib, Najwa; Rothlisberger, Pascal; Gribaldo, Simonetta; Marliere, Philippe; Kaminski, Pierre Alexandre published the artcile< A third purine biosynthetic pathway encoded by aminoadenine-based viral DNA genomes>, Reference of 452-06-2, the main research area is purine pathway aminoadenine viral DNA genome PurZ structure phylogeny.

Cells have two purine pathways that synthesize adenine and guanine ribonucleotides from phosphoribose via inosylate. A chem. hybrid between adenine and guanine, 2-aminoadenine (Z), replaces adenine in the DNA of the cyanobacterial virus S-2L. We show that S-2L and Vibrio phage PhiVC8 encode a third purine pathway catalyzed by PurZ, a distant paralog of succinoadenylate synthase (PurA), the enzyme condensing aspartate and inosylate in the adenine pathway. PurZ condenses aspartate with deoxyguanylate into dSMP (N6-succino-2-amino-2′-deoxyadenylate), which undergoes defumarylation and phosphorylation to give dZTP (2-amino-2′-deoxyadenosine-5′-triphosphate), a substrate for the phage DNA polymerase. Crystallog. and phylogenetics analyses indicate a close relationship between phage PurZ and archaeal PurA enzymes. Our work elucidates the biocatalytic innovation that remodeled a DNA building block beyond canonical mol. biol.

Science (Washington, DC, United States) published new progress about Cyanobacteria phage S-2L. 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Reference of 452-06-2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Wang, Xiaolong; Zeng, Rui; Chu, Shengnan; Tang, Wei; Lin, Na; Fu, Jun; Yang, Jiangrong; Gao, Bo published the artcile< A quencher-free DNAzyme beacon for fluorescently sensing uranyl ions via embedding 2-aminopurine>, Application In Synthesis of 452-06-2, the main research area is DNAzyme beacon aminopurine uranyl ion selectivity sensitivity fluorescence; 2-Aminopurine; DNAzyme; Fluorescence; Quencher-free; Uranyl detection.

DNAzyme-based fluorescent probes have provided valuable protocols for detecting uranium, one of the most common radioactive contaminants in the environment, with ultra-high selectivity and sensitivity. Designing novel DNAzyme beacons to update the mode of fluorescence reporting and/or quenching will continuously enhance “”turn-on”” sensing performance as well as promote actual application of the biol. probes. In this work, we developed a novel quencher-free DNAzyme beacon by embedding fluorescent 2-aminopurine for rapid detection of uranyl ion. 2-aminopurine is able to substitute adenine and keep strong fluorescence in single-stranded DNA whereas being quenched in the hybridized double-stranded DNA by the base-stacking interaction. The combination of such trait of 2-aminopurine and cleavage reaction of DNAzyme in the presence of target co-factors possesses two main advantages for ion sensing: simplicity for avoidance of extra quencher groups and high performance because of superiority of DNAzyme essence. The exptl. conditions including embedding site, pH and salt concentration of buffer solutions, and the amount ratio of enzyme strand to substrate strand used to form DNAzymes were systematically optimized to inspire the highest performance of the biol. beacon. Thus, a detection limit of 9.6 nM, a wide linear range from 5 nM to 400 nM (R2 = 0.997), and selectivity of more than 400 000-fold over other metal ions were achieved by the novel DNAzyme probes.

Biosensors & Bioelectronics published new progress about Concentration (condition). 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Application In Synthesis of 452-06-2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Gao, Xiao; Xiong, Ye; Li, Qizhao; Han, Min; Shan, Dezhi; Yang, Guozheng; Zhang, Shouji; Xin, Danqing; Zhao, Rongrong; Wang, Zhen; Xue, Hao; Li, Gang published the artcile< Extracellular vesicle-mediated transfer of miR-21-5p from mesenchymal stromal cells to neurons alleviates early brain injury to improve cognitive function via the PTEN/Akt pathway after subarachnoid hemorrhage>, Quality Control of 6823-69-4, the main research area is brain injury subarachnoid hemorrhage PTEN Akt mesenchymal stromal cell.

Abstract: Patients with subarachnoid hemorrhage (SAH) often suffer from cognitive function impairments even when they have received proper treatment, such as the clipping or coiling of aneurysms, and this causes problems with returning to work and burdens the family. Increasing attention has been paid to mesenchymal stem cell (MSC)-derived extracellular vesicle (MSC-EV) as promising therapeutic vesicles for stroke management. In this study, we explored the potential role of MSC-EV in a rat model of SAH. We observed that MSC-EV ameliorated early brain injury (EBI) after SAH by reducing the apoptosis of neurons and that SAH induced an increase in the expression level of miR-21 in the prefrontal cortex and hippocampus. In addition, using miRNA profiling and CSF sequencing data from the exRNA Atlas, we demonstrated that EV-derived miR-21 protected neurons from apoptosis and alleviated SAH-induced cognitive dysfunction. The neuroprotective role of MSC-EV was abrogated by miR-21 knockdown or the administration of MK2206, a PTEN/Akt inhibitor. Overall, our results suggest that MSC-EV promotes neuronal survival and alleviates EBI after SAH through transferring miR-21 to recipient neurons.

Cell Death & Disease published new progress about Animal gene, Bcl-2 Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 6823-69-4 belongs to class imidazoles-derivatives, and the molecular formula is C30H30Cl2N6O2, Quality Control of 6823-69-4.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

El Borai, M.; Moustafa, A. H.; Anwar, M.; Abdel Hay, F. I. published the artcile< Synthesis of halogen derivatives of N-methylimidazole>, Category: imidazoles-derivatives, the main research area is halogenation methylimidazole; halomethylimidazole; imidazole halo methyl.

1-Methylimidazole (I) was converted to 2-halo-, 2,5-dihalo-, 5-halo-, 2,4-dihalo-, 4,5-dihalo-, 4-halo-, and 2,4,5-trihalo-1-methylimidazoles. I was treated with BuLi and Br2 to give 2-bromo-1-methylimidazole. The reaction of I with N-bromosuccinimide gave 5-bromo-1-methylimidazole. I reacted with iodine and HIO3 to give 4,5-diiodo-1-methylimidazole.

Polish Journal of Chemistry published new progress about Halogenation. 1003-21-0 belongs to class imidazoles-derivatives, and the molecular formula is C4H5BrN2, Category: imidazoles-derivatives.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem