Author: Jessica.F

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

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

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

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

Ren, Yun-lai; Wang, Qian; Tian, Xin-zhe; Wang, Bin-yu; Wang, Pei published the artcile< Nitrogen dioxide-catalyzed oxidative bromination of benzenes and naphthalines with electron-donating substituents at room temperature>, Recommanded Product: 5-Bromo-1-methyl-1H-imidazole, the main research area is aryl bromide preparation oxidative bromination arene nitrogen dioxide catalyst.

Oxidative bromination of benzenes and naphthalines with electron-donating substituents was investigated by using 8.2% nitrogen dioxide as the catalyst, the residual oxygen in the reaction tube as the oxidant, and mol. bromine as the brominating reagent at room temperature The used heavy metal waste-free catalyst can be easily removed from the products and scarcely stains the final products. But a small amount of byproduct from the nitration of the benzene ring was observed, which led to the consumption of nitrogen dioxide. The reaction is highly atom economic, and a majority of bromine atoms in bromine source were transferred to the bromination products. The bromination was controllable: mono- and di-bromination products were controllably obtained by changing the loading amount of the brominating reagent. Preliminary mechanistic investigation suggests that the bromination firstly undergoes the reaction between mol. bromine and aromatic ring to give aryl bromide and HBr, which is followed by oxygenation of the resulting bromine hydride to form the reactive bromine under the catalysis of the catalytic species.

Fenzi Cuihua published new progress about Aromatic hydrocarbons Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Ognyanov, Vassil I.; Balan, Chenera; Bannon, Anthony W.; Bo, Yunxin; Dominguez, Celia; Fotsch, Christopher; Gore, Vijay K.; Klionsky, Lana; Ma, Vu V.; Qian, Yi-Xin; Tamir, Rami; Wang, Xianghong; Xi, Ning; Xu, Shimin; Zhu, Dawn; Gavva, Narender R.; Treanor, James J. S.; Norman, Mark H. published the artcile< Design of potent, orally available antagonists of the transient receptor potential vanilloid 1. Structure-activity relationships of 2-piperazin-1-yl-1H-benzimidazoles>, Recommanded Product: 2-Chloro-1H-benzo[d]imidazole-5-carbonitrile, the main research area is benzimidazole piperazinyl preparation transient receptor potential vanilloid antagonist antihyperalgesic.

The vanilloid receptor-1 (VR1 or TRPV1) is a membrane-bound, nonselective cation channel that is predominantly expressed by peripheral neurons sensing painful stimuli. TRPV1 antagonists produce antihyperalgesic effects in animal models of inflammatory and neuropathic pain. The synthesis and the structure-activity relationships of a series of 2-(4-pyridin-2-ylpiperazin-1-yl)-1H-benzo[d]imidazoles I [R1 = H, Me3SiCH2CH2OCH2, PhCH2; R2 = F, Cl, Br, F3C, Me, CN, Me3C, MeO2C, etc.; R3 = H, 4-(2-thiazolyl), 4-(4-pyridyl), 5-(4-F3CC6H4), etc.; R4 = H, Me; R5 = H, H2N, MeCHOH, H2C:CH, etc.; R6 = H, Cl, F3C, etc.] and analogs as novel TRPV1 antagonists have been described. I [R1 = H; R2 = F3C; R3 = 4-(3,4,5-F3C6H2); R4 = (R)-Me; R5 = HOCH2CHOH; R6 = Cl; (II)] was among the most potent analogs in this series. This compound was orally bioavailable in rats and was efficacious in blocking capsaicin-induced flinch in rats in a dose-dependent manner. II also reversed thermal hyperalgesia in a model of inflammatory pain, which was induced by complete Freund’s adjuvant (CFA).

Journal of Medicinal Chemistry published new progress about Analgesics. 401567-00-8 belongs to class imidazoles-derivatives, and the molecular formula is C8H4ClN3, Recommanded Product: 2-Chloro-1H-benzo[d]imidazole-5-carbonitrile.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Camel, Benjamin R.; Jose, Davis; Meze, Katarina; Dang, Anson; von Hippel, Peter H. published the artcile< Mapping DNA conformations and interactions within the binding cleft of bacteriophage T4 single-stranded DNA binding protein (gp32) at single nucleotide resolution>, Electric Literature of 452-06-2, the main research area is DNA binding domain bacteriophage T4 gp32 single nucleotide resolution.

In this study, we use single-stranded DNA (oligo-dT) lattices that have been position-specifically labeled with monomer or dimer 2-aminopurine (2-AP) probes to map the local interactions of the DNA bases with the nucleic acid binding cleft of gp32, the single-stranded binding (ssb) protein of bacteriophage T4. Three complementary spectroscopic approaches are used to characterize these local interactions of the probes with nearby nucleotide bases and amino acid residues at varying levels of effective protein binding cooperativity, as manipulated by changing lattice length. These include: (i) examining local quenching and enhancing effects on the fluorescence spectra of monomer 2-AP probes at each position within the cleft; (ii) using acrylamide as a dynamic-quenching additive to measure solvent access to monomer 2-AP probes at each ssDNA position; and (iii) employing CD spectra to characterize changes in exciton coupling within 2-AP dimer probes at specific ssDNA positions within the protein cleft. The results are interpreted in part by what we know about the topol. of the binding cleft from crystallog. studies of the DNA binding domain of gp32 and provide addnl. insights into how gp32 can manipulate the ssDNA chain at various steps of DNA replication and other processes of genome expression.

Nucleic Acids Research published new progress about Bacteriophage T4 protein Gp32 Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Electric Literature of 452-06-2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Gao, Lingling; Nie, Xin; Gou, Rui; Hu, Yuexin; Dong, Hui; Li, Xiao; Lin, Bei published the artcile< Exosomal ANXA2 derived from ovarian cancer cells regulates epithelial-mesenchymal plasticity of human peritoneal mesothelial cells>, Quality Control of 6823-69-4, the main research area is ANXA ovarian cancer epithelial mesenchymal plasticity human peritoneal mesothelium; ANXA2; Implantation and metastasis; epithelial-mesenchymal plasticity; exosome; ovarian cancer.

Ovarian cancer, one of the malignant gynaecol. tumors with the highest mortality rate among female reproductive system, is prone to metastasis, recurrence and chemotherapy resistance, causing a poor prognosis. Exosomes can regulate the epithelial-mesenchymal plasticity of tumor cells, remodel surrounding tumor microenvironment, and affect tumor cell proliferation, invasion and metastasis. However, the function and mechanism of exosomes in the i.p. implantation of ovarian cancer remain unclear. In this study, exosomal annexin A2 (ANXA2) derived from ovarian cancer cells was co-cultured with human peritoneal mesothelial (HMrSV5) cells; functional experiments were conducted to explore the effects of exosomal ANXA2 on the biol. behavior of HMrSV5 and the related mechanisms. This study showed that ANXA2 in ovarian cancer cells can be transferred to HMrSV5 cells through exosomes, exosomal ANXA2 can not only promote the migration, invasion and apoptosis of HMrSV5 cells, but also regulates morphol. changes and fibrosis of HMrSV5 cells. Furthermore, ANXA2 promotes the mesothelial-mesenchymal transition (MMT) and degradation of the extracellular matrix of HMrSV5 cells through PI3K/AKT/mTOR pathway, finally affects pre-metastasis microenvironment of ovarian cancer, which provides a new theor. basis for the mechanism of i.p. implantation and metastasis of ovarian cancer.

Journal of Cellular and Molecular Medicine published new progress about Annexin A2 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

Ambati, Srinivasa Rao; Patel, Jeevan Lal; Gudala, Satish; Chandrakar, Komal; Penta, Santhosh; Mahapatra, S. P.; Banerjee, Subhash published the artcile< Synthesis of novel coumarinyl-pyrido[2,3-d]pyrimidine-2,4-diones using task-specific magnetic ionic liquid, [AcMIm]FeCl4 as catalyst>, Application In Synthesis of 700370-07-6, the main research area is chloroacrolein coumarinyl heterocyclization uracil reusable ionic liquid catalyst; coumarinyl pyridopyrimidinedione preparation green chem.

An acid-functionalized magnetic ionic liquid, 1-carboxymethyl-3-methylimidazolium tetrachloroferrate, was utilized for the synthesis of a series of novel highly functionalized (coumarinyl)pyrido[2,3-d]pyrimidine-2,4-diones I (R1 = H,Br, Cl, MeO; R2 = H, Cl, Br; R3 = Me, cyclopropyl) by the reactions of various 3-chloro-3-(2-oxo-2H-chromen-3-yl)acrylaldehydes II with functionalized 6-aminouracils III. The central point of the present procedure was the use of task-specific acidic ionic liquid which acts as catalyst as well as reaction medium thus avoiding the use of organic solvent and/or protic acid catalyst. The other major advantages of the protocol were (i) shorter reaction time (1 h), (ii) easy work up procedure, (iii) excellent yields of products (91-94%) and (iv) recyclability of the catalyst. The compounds I were identified using FT-IR, 1H-NMR and 13C-NMR and mass spectroscopic studies.

Synthetic Communications published new progress about Coumarins Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 700370-07-6 belongs to class imidazoles-derivatives, and the molecular formula is C6H9ClN2O2, Application In Synthesis of 700370-07-6.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Okuro, Renata Tiemi; Machado, Mariana Nascimento; Casquilho, Natalia Vasconcelos; Jardim-Neto, Alcendino; Roncally-Carvalho, Alysson; Atella, Georgia Correa; Zin, Walter Araujo published the artcile< The role of sphingolipid metabolism disruption on lipopolysaccharide-induced lung injury in mice>, Category: imidazoles-derivatives, the main research area is lung injury sphingolipid metabolism disruption; Ceramide; Enzyme inhibitors; Inflammation; Lipopolysaccharide; Lung injury; Sphingolipid.

This study assessed pulmonary outcomes generated by inhibiting key enzymes of sphingolipid metabolism pathways related to ceramide synthesis in a murine model of lung injury induced by lipopolysaccharide (LPS). C57BL/6 male adult mice received LPS intratracheally and the expressions of acid sphingomyelinase (ASM), neutral sphingomyelinase (NSM), serine palmitoyl transferase (SPT) and dihydroceramide synthase (DS) were assessed at 2, 4, 6, 12 and 24 h after LPS instillation in lung homogenate (n = 30). The pharmacol. inhibition of ASM, NSM, SPT and DS were assayed in other mice groups by three different doses of desipramine, GW4869, myriocin and fumonisin, resp. (n = 90). Their most EDs were administered i.p. 1 or 2 h before LPS to different animal groups (n = 120). Mice underwent determination of pulmonary mechanics, lung histopathol. aspects and apoptosis. The expression levels of the enzymes reached their peak at 2-4 h after LPS administration. ASM inhibition attenuated alveolar collapse and GW4869 decreased lung elastance, proinflammatory cytokines’ levels and was more effective to improve alveolar collapse than desipramine. On the other hand, SPT blockage aggravated lung lesion and no effects it was observed with fumonisin. Moreover, simultaneous administration of inhibitors (desipramine + GW4869, myriocin + fumonisin and all inhibitors together) resulted in no changes. Blockage of sphingomyelinases and the de novo pathways improved and aggravated lung injury, resp., putatively suggesting specific targets to therapeutic strategies in LPS-induced lung injury.

Pulmonary Pharmacology & Therapeutics published new progress about Alveolus. 6823-69-4 belongs to class imidazoles-derivatives, and the molecular formula is C30H30Cl2N6O2, Category: imidazoles-derivatives.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem