Author: Jessica.F

Mandal, Paulami; De, Debojyoti; Yun, Kyunghee; Kim, Kyeong Kyu published the artcile< Improved differentiation of human adipose stem cells to insulin-producing β-like cells using PDFGR kinase inhibitor Tyrphostin9>, Related Products of 452-06-2, the main research area is human insulin PDFGR kinase inhibitor adipose stem cell; Adipose-derived stem cells; Diabetes mellitus; Differentiation; PDGFR inhibitor; β-cell.

Diabetes mellitus (DM) is a metabolic syndrome where insulin secretion or the response to insulin produced by the body is compromised. The only available long-term treatment is the transplantation of pancreas or islet for procuring β-cells. However, due to the shortage of β-cell sources from the tissues, differentiation of pluripotent stem cells or terminally differentiated cells into β-cell is proposed as an alternative strategy. Previously, human adipose-derived stem cells (ADSCs) were reported to be converted into β-like cells by a stepwise treatment of chems. and growth factors. However, due to the low conversion efficiency, the clin. application was not feasible. In this study, we developed a modified conversion protocol with improved yield and functionality, which is achieved by changing the culture method and addition of Tyrphostin9, a platelet-derived growth factor receptor (PDGFR) kinase inhibitor. Tyrphostin9 was identified from a cell-based chem. screening using the mCherry reporter under the control of the Pdx1 promoter. The β-like cells differentiated under the new protocol showed a 3.6-fold increase in the expression of Pdx1, a marker for pancreatic differentiation, as compared to the previous protocol. We propose that Tyrphostin9 contributes to the β-like cell differentiation by playing a dual role; enhancing the definitive endoderm generation by inhibiting the PI3K signaling and suppressing the taurine-mediated proliferation of definitive endoderm. Importantly, these differentiated cells responded well to low and high glucose stimulations compared to cells differentiated by the previous protocol, as confirmed by the 2.0-fold increase in the C-peptide release. As ADSCs are abundant, easily isolated, and autologous in nature, improved differentiation approaches to generate β-like cells from ADSCs would provide a better opportunity for treating diabetes.

Biochemical and Biophysical Research Communications published new progress about Diabetes mellitus. 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Related Products of 452-06-2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Plasser, Felix; Gomez, Sandra; Menger, Maximilian F. S. J.; Mai, Sebastian; Gonzalez, Leticia published the artcile< Highly efficient surface hopping dynamics using a linear vibronic coupling model>, Category: imidazoles-derivatives, the main research area is surface hopping dynamics linear vibronic coupling model.

We report an implementation of the linear vibronic coupling (LVC) model within the surface hopping dynamics approach and present utilities for parameterizing this model in a blackbox fashion. This results in an extremely efficient method to obtain qual. and even semi-quant. information about the photodynamical behavior of a mol., and provides a new route toward benchmarking the results of surface hopping computations. The merits and applicability of the method are demonstrated in a number of applications. First, the method is applied to the SO2 mol. showing that it is possible to compute its absorption spectrum beyond the Condon approximation, and that all the main features and timescales of previous on-the-fly dynamics simulations of intersystem crossing are reproduced while reducing the computational effort by three orders of magnitude. The dynamics results are benchmarked against exact wavepacket propagations on the same LVC potentials and against a variation of the electronic structure level. Four addnl. test cases are presented to exemplify the broader applicability of the model. The photodynamics of the isomeric adenine and 2-aminopurine mols. are studied and it is shown that the LVC model correctly predicts ultrafast decay in the former and an extended excited-state lifetime in the latter. Futhermore, the method correctly predicts ultrafast intersystem crossing in the modified nucleobase 2-thiocytosine and its absence in 5-azacytosine while it fails to describe the ultrafast internal conversion to the ground state in the latter.

Physical Chemistry Chemical Physics published new progress about Absorption spectra. 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Category: imidazoles-derivatives.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Yalcin, Abdullah; Sarkici, Gulcin; Kolac, Umut Kerem published the artcile< PKR inhibitors suppress endoplasmic reticulum stress and subdue glucolipotoxicitymediated impairment of insulin secretion in pancreatic beta cells>, Related Products of 452-06-2, the main research area is pancreatic beta cell protein kinase R inhibitor endoplasmic reticulum; ER stress; protein kinase R; β cell degeneration; Type 2 diabetes.

Type 2 diabetes mellitus is characterized by insulin resistance and hypersecretion of insulin from the pancreas to compensate for decreased insulin sensitivity in the peripheral tissues. In later stages of the disease insulin-secreting beta cell degeneration commences and patients require insulin replacement therapy in order to accomplish proper regulation of their blood glucose. Endoplasmic reticulum (ER) stress in the beta cells is one of the factors contributing to this detrimental effect. Protein kinase R (PKR) is a cellular stress kinase activated by ER stress and contributing to degeneration of pancreatic islets. In order to determine whether inhibition of PKR activation by specific small mol. inhibitors of PKR ameliorates pancreatic insulin secretion capacity, we treated beta cells with two imidazole/oxindole-derived inhibitors of PKR kinase, imoxin (C16) and 2-aminopurine (2-AP), in the presence of ER stress. Our results demonstrate that PKR inhibition suppresses tunicamycin-mediated ER stress without altering the insulin production capacity of the cells. Palmitic acid-mediated suppression of insulin secretion, however, was subdued significantly by PKR inhibitor treatment through an ER stress-related mechanism. We suggest that PKR inhibitor treatment may be used to increase the insulin secretion capacity of the pancreas in later stages of diabetes.

Turkish Journal of Biology published new progress about Cell death. 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Related Products of 452-06-2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Wannberg, Johan; Gising, Johan; Lindman, Jens; Salander, Jessica; Gutierrez-de-Teran, Hugo; Ablahad, Hanin; Hamid, Selin; Groenbladh, Alfhild; Spizzo, Iresha; Gaspari, Tracey A.; Widdop, Robert E.; Hallberg, Anders; Backlund, Maria; Lesniak, Anna; Hallberg, Mathias; Larhed, Mats published the artcile< N-(Methyloxycarbonyl)thiophene sulfonamides as high affinity AT2 receptor ligands>, Product Details of C7H12N2, the main research area is AT2 receptor ligand thiophene sulfonamide; AT(2)R ligands; Angiotensin II type 2 receptor; Carboxylic acid bioisosteres; Liver microsomes; Sulfonyl carbamates.

A series of meta-substituted acetophenone derivatives, encompassing N-(alkyloxycarbonyl)thiophene sulfonamide fragments have been synthesized. Several selective AT2 receptor ligands were identified, among those a tert-butylimidazole derivative (20) with a Ki of 9.3 nM, that demonstrates a high stability in human liver microsomes (t1/2 = 62 min) and in human hepatocytes (t1/2 = 194 min). This methyloxycarbonylthiophene sulfonamide is a 20-fold more potent binder to the AT2 receptor and is considerably more stable in human liver microsomes, than a previously reported and broadly studied structurally related AT2R prototype antagonist 3 (C38). Ligand 20 acts as an AT2R agonist and caused an AT2R mediated concentration-dependent vasorelaxation of pre-contracted mouse aorta. Furthermore, in contrast to imidazole derivative C38, the tert-butylimidazole derivative 20 is a poor inhibitor of CYP3A4, CYP2D6 and CYP2C9. It is demonstrated herein that smaller alkyloxycarbonyl groups make the ligands in this series of AT2R selective compounds less prone to degradation and that a high AT2 receptor affinity can be retained after truncation of the alkyloxycarbonyl group. Binding modes of the most potent AT2R ligands were explored by docking calculations combined with mol. dynamics simulations.

Bioorganic & Medicinal Chemistry published new progress about Angiotensin AT1 receptors Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 36947-69-0 belongs to class imidazoles-derivatives, and the molecular formula is C7H12N2, Product Details of C7H12N2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

He, Zhonghan; Li, Yanfeng; Lian, Zhenwei; Liu, Jin; Xian, Hongyi; Jiang, Ran; Hu, Zuqing; Fang, Daokui; Hu, Dalin published the artcile< Exosomal secretion may be a self-protective mechanism of its source cells under environmental stress: A study on human bronchial epithelial cells treated with hydroquinone>, Product Details of C30H30Cl2N6O2, the main research area is bronchial epithelial cell line hydroquinone exosomal secretion environmental stress; DNA damage; exosomal secretion; human bronchial epithelial cells; hydroquinone; toxic effects.

Accumulating evidence reveals that exosome plays an important role in cell-to-cell communication in both physiol. and pathol. processes by transferring bioactive mols. However, the role of exosomal secretion in the adaptation of its source cells to the stimuli of environmental chems. remains elusive. In this study, we revealed that the exposure of hydroquinone (HQ; the main bioactive metabolite of benzene) to human bronchial epithelial cells (16HBE) resulted in decreased ability of cell proliferation and migration, and simultaneously DNA damage and micronuclei formation. Interestingly, when exosomal secretion of HQ treated 16HBE cells was inhibited with the inhibitor GW4869, cellular proliferation and migration were further significantly reduced; concurrently, their DNA damage and micronuclei formation were both further significantly aggravated. Herein, we conclude that exosomal secretion of 16HBE cells may be an important self-protective function against the toxic effects induced by HQ.

Journal of Applied Toxicology published new progress about Cell migration. 6823-69-4 belongs to class imidazoles-derivatives, and the molecular formula is C30H30Cl2N6O2, Product Details of C30H30Cl2N6O2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Alonso, Nerea; Munoz, Juan de M.; Egle, Brecht; Vrijdag, Johannes L.; De Borggraeve, Wim M.; de la Hoz, Antonio; Diaz-Ortiz, Angel; Alcazar, Jesus published the artcile< First example of a continuous-flow carbonylation reaction using aryl formates as CO precursors>, COA of Formula: C4H5BrN2, the main research area is haloarene aryl formate carbonylation flow chem.

The first continuous flow carbonylation reaction using aryl formates as CO precursor is reported. The reaction is practical, scalable and high yielding. The use of a flow protocol safely allows expanding the scope to activated chlorides, nitrogen heterocycles and to the selective introduction of an ester group in dihalo-derivatives Further selective reduction of the ester formed to an aldehyde in flow is also described.

Journal of Flow Chemistry published new progress about Aryl halides Role: RCT (Reactant), RACT (Reactant or Reagent). 1003-21-0 belongs to class imidazoles-derivatives, and the molecular formula is C4H5BrN2, COA of Formula: C4H5BrN2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Ford, Jodi L; Browning, Christopher R published the artcile< Effects of exposure to violence with a weapon during adolescence on adult hypertension.>, HPLC of Formula: 1003-21-0, the main research area is Adverse childhood experiences; Exposure to violence; Hypertension; Victimization; Witnessed violence.

OBJECTIVES: To examine the longitudinal associations between exposure to violence with a weapon during the past year among adolescents and hypertension during adulthood, including the extent to which adult cardiovascular risk factors mediated the association. METHODS: Secondary analysis of the National Longitudinal Study of Adolescent Health, 1994-2008. The sample included 3555 male and 4416 female participants who were aged 11-17 years at wave 1 (1994-1995). Participants were categorized as hypertensive if they had a mean systolic blood pressure of 140 mm Hg or higher or a mean diastolic pressure of 90 mm Hg or higher at wave 4 (2008). Witnessed violence with a weapon was defined as having seen a shooting or stabbing during the year before wave 1, whereas victim of violence with a weapon was defined as having been shot, cut, or stabbed or had a gun or knife drawn on them during the year before wave 1. Potential mediators of adult cardiovascular risk (wave 4) included body mass index, daily smoking, alcohol abuse, and depression. RESULTS: Males who witnessed violence and females who were victims of violence in the year before wave 1 had an increased odds of hypertension at wave 4 compared with their unexposed peers (adjusted odds ratio, 1.45; 95% confidence interval, 1.003-2.10 and adjusted odds ratio, 1.72; 95% confidence interval, 1.04-2.84, respectively). The hypothesized adult cardiovascular risk mediators did not significantly attenuate the associations for either the male or female samples. CONCLUSIONS: Interventions addressing prior violence exposure are needed to promote adult cardiovascular health.

Annals of epidemiology published new progress about 1003-21-0. 1003-21-0 belongs to class imidazoles-derivatives, and the molecular formula is C4H5BrN2, HPLC of Formula: 1003-21-0.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Grob, Jonathan E.; Nunez, Jill; Dechantsreiter, Michael A.; Hamann, Lawrence G. published the artcile< One-pot reductive amination and Suzuki-Miyaura cross-coupling of formyl aryl and heteroaryl MIDA boronates in array format>, Related Products of 1003-21-0, the main research area is arylmethylpyrrolidinylmethanol amine derivative preparation; aryl MIDA boronate preparation aryl halide amination Suzuki reaction; boronic acid MIDA.

Formyl-substituted aryl and heteroaryl MIDA boronates were prepared by a DMSO-free method and used in the first reported one-pot reductive amination-Suzuki-Miyaura cross-coupling sequence. This sequence was then carried out in parallel array format, using microwave-assisted in situ release cross-coupling of MIDA boronates to generate a library with diversity along two axes, affording rapid and convenient access to an array of druglike mols.

Journal of Organic Chemistry published new progress about Aryl halides Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Murao, Atsushi; Tan, Chuyi; Jha, Alok; Wang, Ping; Aziz, Monowar published the artcile< Exosome-mediated eCIRP release from macrophages to induce inflammation in sepsis>, Application In Synthesis of 6823-69-4, the main research area is inflammation sepsis exosome extracellular cold inducible RNA binding protein; cytokines; eCIRP; exosomes; macrophage; neutrophil; sepsis.

Extracellular cold-inducible RNA-binding protein (eCIRP) is an important damage-associated mol. pattern (DAMP). Despite our understanding of the potentially harmful effects of eCIRP in sepsis, how eCIRP is released from cells remains elusive. Exosomes are endosome-derived extracellular vesicles, which carry proteins, lipids, and nucleic acids to facilitate intercellular communication and several extracellular functions. We hypothesized that eCIRP is released via exosomes to induce inflammation in sepsis. Exosomes isolated from the supernatants of LPS-treated macrophage culture and serum of endotoxemia and polymicrobial sepsis mice showed high purity, as revealed by their unique median sizes ranging between 70 and 126 nm in diameter eCIRP levels of the exosomes were significantly increased after LPS treatment in the supernatants of macrophage culture, mouse serum, and cecal ligation and puncture (CLP)-induced sepsis mouse serum. Protease protection assay demonstrated the majority of eCIRP was present on the surface of exosomes. Treatment of WT macrophages and mice with exosomes isolated from LPS-treated WT mice serum increased TNFα and IL-6 production However, treatment with CIRP-/- mice serum exosomes significantly decreased these levels compared with WT exosome-treated conditions. CIRP-/- mice serum exosomes significantly decreased neutrophil migration in vitro compared with WT exosomes. Treatment of mice with serum exosomes isolated from CIRP-/- mice significantly reduced neutrophil infiltration into the peritoneal cavity. Our data suggest that eCIRP can be released via exosomes to induce cytokine production and neutrophil migration. Thus, exosomal eCIRP could be a potential target to inhibit inflammation.

Frontiers in Pharmacology published new progress about Binding energy. 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

Rizzo, Carla; Marullo, Salvatore; Feroci, Marta; Accurso, Vincenza; D’Anna, Francesca published the artcile< Insights into the effect of the spacer on the properties of imidazolium based AIE luminogens>, Category: imidazoles-derivatives, the main research area is imidazolium based aggregation induced emission luminogen preparation self assembly.

With the aim to obtain organic salts with potential applications in high performance mol. electronics, we combined properties of π-conjugated spacers, like 1,4-diethynylbenzene and 1,6-diethynylpyrene, with the ones of both imidazole and imidazolium units. Physico-chem. properties of obtained fluorescent organic salts were investigated performing thermo-gravimetric anal. (TGA), differential scanning calorimetry (DSC) and cyclic voltammetry measurements (CV). Photophys. behavior of the salts was analyzed in conventional solvents and ionic liquids, by UV-vis and fluorescence investigation. Solution phase aggregation study revealed that these salts self-assemble in conventional solvents and ionic liquids, leading to aggregation induced emission processes. Notably, emission was maintained also in the solid state, with higher or lower intensity compared with the solution, depending on which spacer is present. This latter, also impacts on the morphol. of the aggregates, allowing fine tuning the properties of the supramol. materials formed.

Dyes and Pigments published new progress about Aggregation. 1003-21-0 belongs to class imidazoles-derivatives, and the molecular formula is C4H5BrN2, Category: imidazoles-derivatives.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem