Author: Jessica.F

Qin, Xiaofeng; Lin, Xiaofang; Liu, Lang; Li, Ying; Li, Xiang; Deng, Zhenghao; Chen, Huiping; Chen, Hui; Niu, Zhiyuan; Li, Zisheng; Hu, Yongbin published the artcile< Macrophage-derived exosomes mediate silica-induced pulmonary fibrosis by activating fibroblast in an endoplasmic reticulum stress-dependent manner>, Related Products of 6823-69-4, the main research area is macrophage exosome proliferation migration pulmonary fibrosis endoplasmic reticulum stress; ER stress; exosomes; fibroblasts; macrophages; silicosis.

Macrophages play a key role in silicosis, and exosomes are potent mediators of intercellular communication. This suggests that macrophage-derived exosomes have a potential contribution to the pathogenesis of silicosis. To investigate whether macrophage-derived exosomes promote or inhibit lung fibrosis, in vitro, silica-exposed macrophage-derived exosomes (SiO2-Exos) were collected and cocultured with fibroblasts. The expression of collagen I and α-SMA was evaluated. Furthermore, the endoplasmic reticulum (ER) stress markers BIP, XBP1s and P-eIF2α were assessed after treatment with or without the ER stress inhibitor 4-PBA. In vivo, mice were pre-treated with the exosome secretion inhibitor GW4869 prior to silica exposure. After sacrifice, lung tissues were histol. examined, and the expression of proinflammatory cytokines (TNF-α, IL-1β and IL-6) in bronchoalveolar lavage fluid (BALF) was measured. The results showed that the expression of collagen I and α-SMA was up-regulated after treatment with SiO2-Exos, accompanied by increased expression of BIP, XBP1s and P-eIF2α. Pre-treatment with 4-PBA reversed this effect. More importantly, an in vivo study demonstrated that pre-treatment with GW4869 decreased lung fibrosis and the expression of TNF-α, IL-1β and IL-6 in BALF. These results suggested that SiO2-Exos are profibrogenic and that the facilitating effect is dependent on ER stress.

Journal of Cellular and Molecular Medicine published new progress about Animal gene Role: BSU (Biological Study, Unclassified), PRP (Properties), BIOL (Biological Study) (ACTA2). 6823-69-4 belongs to class imidazoles-derivatives, and the molecular formula is C30H30Cl2N6O2, Related Products of 6823-69-4.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Xu, Suowen; Jin, Tengchuan; Weng, Jianping published the artcile< Endothelial cells as a key cell type for innate immunity: a focused review on RIG-I signaling pathway>, Safety of 7H-Purin-2-amine, the main research area is review innate immunity endothelial cell signaling pathway RIGI; DDX58; RIG-I; endothelial cells; immunity; inflammation.

A review. The vascular endothelium consists of a highly heterogeneous monolayer of endothelial cells (ECs) which are the primary target for bacterial and viral infections due to EC’s constant and close contact with the bloodstream. Emerging evidence has shown that ECs are a key cell type for innate immunity. Like macrophages, ECs serve as sentinels when sensing invading pathogens or microbial infection caused by viruses and bacteria. It remains elusive how ECs senses danger signals, transduce the signal and fulfil immune functions. Retinoic acid-inducible gene-I (RIG-I, gene name also known as DDX58) is an important member of RIG-I-like receptor (RLR) family that functions as an important pathogen recognition receptor (PRR) to execute immune surveillance and confer host antiviral response. Recent studies have demonstrated that virus infection, dsRNA, dsDNA, interferons, LPS, and 25-hydroxycholesterol (25-HC) can increase RIG-1 expression in ECs and propagate anti-viral response. Of translational significance, RIG-I activation can be inhibited by Panax notoginseng saponins, endogenous PPARγ ligand 15-PGJ2, tryptanthrin and 2-animopurine. Considering the pivotal role of inflammation and innate immunity in regulating endothelial dysfunction and atherosclerosis, here we provided a concise review of the role of RIG-I in endothelial cell function and highlight future direction to elucidate the potential role of RIG-I in regulating cardiovascular diseases as well as virus infectious disease, including COVID-19. Furthered understanding of RIG-I-mediated signaling pathways is important to control disorders associated with altered immunity and inflammation in ECs.

Frontiers in Immunology published new progress about Antiviral agents. 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Safety of 7H-Purin-2-amine.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Guo, Belinda B.; Bellingham, Shayne A.; Hill, Andrew F. published the artcile< The Neutral Sphingomyelinase Pathway Regulates Packaging of the Prion Protein into Exosomes>, Computed Properties of 6823-69-4, the main research area is neutral sphingomyelinase packaging prion protein exosome; Ceramide; Exosome; Exosomes; Extracellular Vesicles; Neutral Sphingomyelinase; Prion; Prion Disease; nSMase2.

Prion diseases are a group of transmissible, fatal neurodegenerative disorders associated with the misfolding of the host-encoded prion protein, PrPC, into a disease-associated form, PrPSc. The transmissible prion agent is principally formed of PrPSc itself and is associated with extracellular vesicles known as exosomes. Exosomes are released from cells both in vitro and in vivo, and have been proposed as a mechanism by which prions spread intercellularly. The biogenesis of exosomes occurs within the endosomal system, through formation of intraluminal vesicles (ILVs), which are subsequently released from cells as exosomes. ILV formation is known to be regulated by the endosomal sorting complexes required for transport (ESCRT) machinery, although an alternative neutral sphingomyelinase (nSMase) pathway has been suggested to also regulate this process. Here, we investigate a role for the nSMase pathway in exosome biogenesis and packaging of PrP into these vesicles. Inhibition of the nSMase pathway using GW4869 revealed a role for the nSMase pathway in both exosome formation and PrP packaging. In agreement, targeted knockdown of nSMase1 and nSMase2 in mouse neurons using lentivirus-mediated RNAi also decreases exosome release, demonstrating the nSMase pathway regulates the biogenesis and release of exosomes. We also demonstrate that PrPC packaging is dependent on nSMase2, whereas the packaging of disease-associated PrPSc into exosomes occurs independently of nSMase2. These findings provide further insight into prion transmission and identify a pathway which directly assists exosome-mediated transmission of prions.

Journal of Biological Chemistry published new progress about Aggregation. 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

Sarkar, Satavisha; Banerjee, Arghya; Yao, Wang; Patterson, Eric V.; Ngai, Ming-Yu published the artcile< Photocatalytic Radical Aroylation of Unactivated Alkenes: Pathway to β-Functionalized 1,4-, 1,6-, and 1,7-Diketones>, Related Products of 1003-21-0, the main research area is unsym diketone preparation photoredox catalysis; aroyl chloride unactivated alkene aroylation photochem; 1,n-diketones; aroylation; migration; photoredox catalysis; unactivated alkenes.

The development of a photocatalytic strategy for the synthesis of β-functionalized unsym. 1,4-, 1,6-, and 1,7-diketones from aroyl chlorides and unactivated alkenes at room temperature is reported. The mild reaction conditions not only tolerate a wide range of functional groups and structural moieties, but also enable migration of a variety of distal groups including (hetero)arenes, nitrile, aldehyde, oxime derivative, and alkene. The efficiency of chirality transfer, factors that control the distal-group migration, and synthesis of carbocycles and heterocycles from the diketones are also described. Mechanistic studies suggest a reaction pathway involving a photocatalytic radical aroylation of unactivated alkenes followed by a distal-group migration, oxidation, and deprotonation to afford the desired diketones.

ACS Catalysis published new progress about Alcohols, unsaturated Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation) (tertiary). 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

Iddon, Brian; Lim, Bee Lan published the artcile< Metalation and metal-halogen exchange reactions of imidazoles>, Recommanded Product: 5-Bromo-1-methyl-1H-imidazole, the main research area is lithiation sulfuration ethoxymethylimidazole; imidazole lithiation sulfuration.

Imidazoles I (R = SPh, R1 = H, R2 = H, MeS) underwent lithiation and sulfuration to give thioimidazoles. E.g., I (R = SPh, R1 = R2 = H) was treated with BuLi in THF at -78° followed by addition of (PhS)2 to give I (R = R2 = SPh, R1 = H) quant. Similar treatment of I (R-R2 = Br) gave 67% I (R = SPh, R1 = R2 = Br).

Journal of the Chemical Society, Chemical Communications published new progress about Sulfuration. 1003-21-0 belongs to class imidazoles-derivatives, and the molecular formula is C4H5BrN2, Recommanded Product: 5-Bromo-1-methyl-1H-imidazole.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Yan, Kui; Bai, Zhengwu; Huang, Shaohua published the artcile< NMR signal separation of ionic liquids by poly(sodium-p-styrenesulfonate)-assisted chromatographic NMR spectroscopy>, Application of C6H9ClN2O2, the main research area is ionic liquid polysodium styrenesulfonate chromatog NMR spectroscopy.

Diffusion-ordered NMR spectroscopy (DOSY), dubbed chromatog. NMR spectroscopy, can be used to simultaneously distinguish and identify the structures of components in a mixture according to their different diffusion coefficients In order to improve the resolution of DOSY on the diffusion dimension, a lot of matrixes have been developed to expand the application of this technique in mixture anal. However, there is no matrix to detect the mixture of ionic liquids (ILs). Herein, we introduced a new matrix, poly(sodium-p-styrenesulfonate) (PSSNa), which can be used to fully sep. the signals of a mixture of different ILs. The mixture of three imidazolium ILs of 1-butyl-3-methylimidazolium bromide, 1-allyl-3-vinylimidazolium bromide and 1-carboxymethyl-3-methylimidazolium chloride could be fully distinguished by virtue of their different interactions with PSSNa. We also investigated the influences of PSSNa amount, IL concentration and solution pH value on the signal resolution of mixtures This work provides a scientific reference for the anal. of the other IL analytes.

Magnetic Resonance Letters published new progress about Chromatography. 700370-07-6 belongs to class imidazoles-derivatives, and the molecular formula is C6H9ClN2O2, Application of C6H9ClN2O2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Won, Jong Hoon; Kim, Seok Kyun; Shin, In Chul; Ha, Hae Chan; Jang, Ji Min; Back, Moon Jung; Kim, Dae Kyong published the artcile< Dopamine transporter trafficking is regulated by neutral sphingomyelinase 2/ceramide kinase>, Recommanded Product: p-Benzenediacrylanilide, 4′,4′′-di-2-imidazolin-2-yl-, dihydrochloride, the main research area is dopamine ceramide kinase SMase2 C1P CERK signaling cortex pheochromocytoma; Ceramide; Ceramide-1-phosphate; Dopamine transporter; Neutral sphingomyelinase 2; Sphingomyelin pathway; Trafficking.

Dopamine (DA) reuptake is the primary mechanism to terminate dopaminergic transmission in the synaptic cleft. The dopamine transporter (DAT) has an important role in the regulation of DA reuptake. This study provides anatomical and physiol. evidence that DAT recycling is regulated by ceramide kinase via the sphingomyelin pathway. First, the results show that DAT and neutral sphingomyelinase 2 (nSMase2) were successfully co-precipitated from striatal samples and were colocalized in the mouse striatum or PC12 cells. We also identified a protein-protein interaction between nSMase2 and DAT through in situ proximity ligation assay experiments in the mouse striatum. Second, dopamine (DA) stimulated the formation of ceramide and increased nSMase activity in PC12 cells, while treatment with a cell-permeable ceramide-1-phosphate (C1P) increased DA uptake. Third, we used inhibitors and siRNA to inhibit nSMase2 and ceramide kinase and observed the effects on DAT recycling in PC12 cells. Treatment with ceramide kinase inhibitor K1, or nSMase inhibitor GW4869, decreased DA uptake in PC12 cells, although the application of FB1, a ceramide synthase inhibitor, did not affect DA uptake. Transfection of nSMase2 and CERK siRNA decreased DAT surface level in PC12 cells. These results suggested that SM-derived C1P affects cell surface levels of DAT.

Cellular Signalling published new progress about Brain corpus striatum, dorsal striatum Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 6823-69-4 belongs to class imidazoles-derivatives, and the molecular formula is C30H30Cl2N6O2, Recommanded Product: p-Benzenediacrylanilide, 4′,4′′-di-2-imidazolin-2-yl-, dihydrochloride.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Kusama, Hitoshi; Arakawa, Hironori; Sugihara, Hideki published the artcile< Density functional study of imidazole-iodine interaction and its implication in dye-sensitized solar cell>, SDS of cas: 1003-21-0, the main research area is imidazole iodine interaction dye sensitized solar cell; charge transfer complex imidazole iodine density functional theory.

The monomer and charge-transfer complexes of 14 different imidazole derivatives with diiodine were studied by a d. functional theory (DFT) method. DFT calculations revealed that the σ* orbital of iodine interacts with the nitrogen lone pair of imidazoles at position 3. The influence of these imidazoles addition on the performance of a bis(tetrabutylammonium)cis-bis(thiocyanato)bis(2,2′-bipyridine-4-carboxylic acid, 4′-carboxylate)ruthenium(II) (N719) dye-sensitized nanocrystalline TiO2 solar cell with an I-/I3- redox electrolyte in acetonitrile was also studied. All of the imidazole derivatives enhanced the open-circuit photovoltage (Voc). The resulting Voc values of solar cell were compared to computational calculations on the interaction between imidazoles and I2 by a DFT method. Optimized geometries, frequency analyses, and interaction energies suggest that the V oc value is higher, the more the imidazole complexes with I2.

Journal of Photochemistry and Photobiology, A: Chemistry published new progress about Bond angle. 1003-21-0 belongs to class imidazoles-derivatives, and the molecular formula is C4H5BrN2, SDS of cas: 1003-21-0.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Akopyan, A. V.; Eseva, E. A.; Polikarpova, P. D.; Baigil’diev, T. M.; Rodin, I. A.; Anishnov, A. V. published the artcile< Catalytic Activity of Polyfunctional Ionic Liquids in Oxidation of Model Sulfur Organic Compounds>, Computed Properties of 700370-07-6, the main research area is imidazolium molybdate ionic liquid oxidative desulfurization catalyst.

Ionic liquids based on 1-methylimidazole were synthesized. The liquids contain Bronsted acid centers in the cation and a transition metal atom in the anion. The polyfunctional ionic liquids synthesized in the study are effective catalysts for the oxidative desulfurization process. The conditions are found for reaching the 100% conversion of Me Ph sulfide under mild conditions in the presence of the catalysts, ionic liquids [ionic liquid: 3-(carboxymethyl)-1-methyl-1H-imidazol-3-ium molybdate with S:Mo molar ratio = 24:1, 2 h, 40°C, H2O2:S molar ratio = 12:1].

Russian Journal of Applied Chemistry published new progress about Anion exchange (with molybdate, tungstate and vanadate). 700370-07-6 belongs to class imidazoles-derivatives, and the molecular formula is C6H9ClN2O2, Computed Properties of 700370-07-6.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Taylor, Steven J.; Abeywardane, Asitha; Liang, Shuang; Muegge, Ingo; Padyana, Anil K.; Xiong, Zhaoming; Hill-Drzewi, Melissa; Farmer, Bennett; Li, Xiang; Collins, Brandon; Li, John Xiang; Heim-Riether, Alexander; Proudfoot, John; Zhang, Qiang; Goldberg, Daniel; Zuvela-Jelaska, Ljiljana; Zaher, Hani; Li, Jun; Farrow, Neil A. published the artcile< Fragment-Based Discovery of Indole Inhibitors of Matrix Metalloproteinase-13>, Recommanded Product: 5-Bromo-1-methyl-1H-imidazole, the main research area is indole derivative structure MMP 13 inhibitor arthritis.

Matrix metalloproteases (MMPs) play an important role in cartilage homeostasis under both normal and inflamed disease states and, thus, have become attractive targets for the treatment of arthritic diseases. Herein, we describe the identification of a potent, selective MMP-13 inhibitor, developed using fragment-based structure-guided lead identification and optimization techniques. Virtual screening methods identified a novel, indole-based MMP-13 inhibitor that bound into the S1′ pocket of the protein exhibiting a novel interaction pattern hitherto not observed in MMP-13 inhibitors. X-ray crystallog. structures were used to guide the elaboration of the fragment, ultimately leading to a potent inhibitor that was >100-fold selective over nine other MMP isoforms tested.

Journal of Medicinal Chemistry published new progress about Antiarthritics. 1003-21-0 belongs to class imidazoles-derivatives, and the molecular formula is C4H5BrN2, Recommanded Product: 5-Bromo-1-methyl-1H-imidazole.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem