Author: Jessica.F

Cristofalo, Matteo; Kovari, Daniel; Corti, Roberta; Salerno, Domenico; Cassina, Valeria; Dunlap, David; Mantegazza, Francesco published the artcile< Nanomechanics of Diaminopurine-Substituted DNA>, Related Products of 452-06-2, the main research area is diaminopurine double strand DNA nanomechanics.

2,6-Diaminopurine (DAP) is a nucleobase analog of adenine. When incorporated into double-stranded DNA (dsDNA), it forms three hydrogen bonds with thymine. Rare in nature, DAP substitution alters the phys. characteristics of a DNA mol. without sacrificing sequence specificity. Here, we show that in addition to stabilizing double-strand hybridization, DAP substitution also changes the mech. and conformational properties of dsDNA. Thermal melting experiments reveal that DAP substitution raises melting temperatures without diminishing sequence-dependent effects. Using a combination of at. force microscopy (AFM), magnetic tweezer (MT) nanomech. assays, and CD spectroscopy, we demonstrate that DAP substitution increases the flexural rigidity of dsDNA yet also facilitates conformational shifts, which manifest as changes in mol. length. DAP substitution increases both the static and dynamic persistence length of DNA (measured by AFM and MT, resp.). In the static case (AFM), in which tension is not applied to the mol., the contour length of DAP-DNA appears shorter than wild-type (WT)-DNA; under tension (MT), they have similar dynamic contour lengths. At tensions above 60 pN, WT-DNA undergoes characteristic overstretching because of strand separation (tension-induced melting) and spontaneous adoption of a conformation termed S-DNA. Cyclic overstretching and relaxation of WT-DNA at near-zero loading rates typically yields hysteresis, indicative of tension-induced melting; conversely, cyclic stretching of DAP-DNA showed little or no hysteresis, consistent with the adoption of the S-form, similar to what has been reported for GC-rich sequences. However, DAP-DNA overstretching is distinct from GC-rich overstretching in that it happens at a significantly lower tension. In physiol. salt conditions, evenly mixed AT/GC DNA typically overstretches around 60 pN. GC-rich sequences overstretch at similar if not slightly higher tensions. Here, we show that DAP-DNA overstretches at 52 pN. In summary, DAP substitution decreases the overall stability of the B-form double helix, biasing toward non-B-form DNA helix conformations at zero tension and facilitating the B-to-S transition at high tension.

Biophysical Journal published new progress about Conformational transition. 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

Ibrahim, Mansur; Malik, Imran; Mansour, Waseem; Sharif, Muhammad; Fettouhi, Mohammed; El Ali, Bassam published the artcile< Efficient N-heterocyclic carbene palladium(II) catalysts for carbonylative Suzuki-Miyaura coupling reactions leading to aryl ketones and diketones>, Recommanded Product: 5-Bromo-1-methyl-1H-imidazole, the main research area is palladium heterocyclic carbene pyridine complex catalyst preparation; aryl ketone diketone preparation; iodide aryl boronic acid palladium catalyst carbonylative Suzuki Miyaura.

New N, N’substituted imidazolium salts and their corresponding diiodopyridinepalladium(II) complexes I [R = CN, OMe] were successfully synthesized and characterized. Reactions of palladium iodide with the newly synthesized N, N’-substituted imidazolium iodides in pyridine afforded the corresponding new palladium-N-heterocyclic carbene pyridine complexes I in high yields. The new palladium(II) complex I [R = OMe] was characterized by single crystal X-ray diffraction anal. The Pd(II) ion was bonded to the nitrogen atom of the pyridine, the carbon atom of the NHC carbene ligand and two trans iodides resulting in distorted square planar geometry. The carbonylative Suzuki-Miyaura coupling reaction of aryl iodides with aryl boronic acids afforded aryl ketones II [R1 = H, CN, C(O)Me, OMe; R2 = H, OMe, COOH, etc.] and diketones III [R3 = H, CN, OMe] using palladium-N-heterocyclic carbene pyridine complexes.

Journal of Organometallic Chemistry published new progress about Aryl iodides 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

Akiyama, Masayasu; Hara, Yukihiro; Tanabe, Minoru published the artcile< Effects of the substituents on the hydrolysis of 4-nitrophenyl acetate catalyzed by 2-substituted imidazoles>, Computed Properties of 36947-69-0, the main research area is hydrolysis kinetics nitrophenyl acetate imidazole; Broensted catalysis nitrophenyl acetate hydrolysis; mechanism hydrolysis nitrophenyl acetate imidazole; LFER hydrolysis nitrophenyl acetate.

A series of 2-alkyl and -(hydroxyalkyl)-substituted imidazoles catalyzed the hydrolysis of 4-nitrophenyl acetate. Activation parameters and D2O solvent isotope effects were determined for some of these imidazoles and showed that a bulky substituent decreased the rate of nucleophilic catalysis for most of the imidazoles. Anal. in terms of the Broensted catalysis law gave an extrapolated rate for each imidazole and indicated the importance of the steric effect relative to the parent compound Catalysis by 2-(1,1-dimethyl-2-hydroxyethyl)imidazole involved partial general base catalysis.

Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999) published new progress about Bronsted LFER. 36947-69-0 belongs to class imidazoles-derivatives, and the molecular formula is C7H12N2, Computed Properties of 36947-69-0.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Sun, Ping; Wang, Naixin; Zhao, Peng; Wang, Chao; Li, Hairu; Chen, Qi; Ge, Mang; Wang, Weiwei; Fang, Shaohong; Du, Guoqing; Zhang, Maomao; Tian, Jiawei published the artcile< Circulating Exosomes Control CD4+ T Cell Immunometabolic Functions via the Transfer of miR-142 as a Novel Mediator in Myocarditis>, Application of C30H30Cl2N6O2, the main research area is miR CD T cell immunometabolic function circulating exosome myocarditis; exosomes; experimental autoimmune myocarditis; glycolysis; miR-142.

The CD4+ T cells undergo immunometabolic activation to mount an immunogenic response during exptl. autoimmune myocarditis (EAM). Exosomes are considered key messengers mediating multiple T cell functions in autoimmune responses. However, the role of circulating exosomes in EAM immunopathogenesis and CD4+ T cell dysfunction remains elusive. Our objective was to elucidate the mechanism of action for circulating exosomes in EAM pathogenesis. We found that serum exosomes harvested from EAM mice induced CD4+ T cell immunometabolic dysfunction. Treatment with the exosome inhibitor GW4869 protected mice from developing EAM, underlying that exosomes are indispensable for the pathogenesis of EAM. Furthermore, by transfer of EAM exosomes, we confirmed that circulating exosomes initiate the T cell pathol. immune response, driving the EAM pathol. process. Mechanistically, EAM-circulating exosomes selectively loaded abundant microRNA (miR)-142. We confirmed methyl-CpG binding domain protein 2 (MBD2) and suppressor of cytokine signaling 1 (SOCS1) as functional target genes of miR-142. The miR-142/MBD2/MYC and miR-142/SOCS1 communication axes are critical to exosome-mediated immunometabolic turbulence. Moreover, the in vivo injection of the miR-142 inhibitor alleviated cardiac injury in EAM mice. This effect was abrogated by pretreatment with EAM exosomes. Collectively, our results indicate a newly endogenous mechanism whereby circulating exosomes regulateCD4+ T cell immunometabolic dysfunction and EAM pathogenesis via cargo miR-142.

Molecular Therapy published new progress about Apolipoprotein A-I Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 6823-69-4 belongs to class imidazoles-derivatives, and the molecular formula is C30H30Cl2N6O2, Application of C30H30Cl2N6O2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Zhang, Jing; Tao, Yu; Cai, Renfei; Wang, Yao published the artcile< The miR-196a-5p-rich extracellular vesicles from trophoblasts induce M1 polarization of macrophages in recurrent miscarriage>, Application In Synthesis of 6823-69-4, the main research area is recurrent miscarriage miR196a5p extracellular vesicle trophoblast macrophage polarization.

Numerous studies have described the presence of crosstalk between trophoblasts and macrophages and the critical role it plays in recurrent miscarriage (RM). However, the mechanism of trophoblast-derived extracellular vesicle (EV) miRNAs and their interactions with decidual macrophages in the pathogenesis of RM remains unclear. MiRNA-seq was used to identify the differentially expressed miRNAs between RM patients and healthy controls. qPCR and in situ hybridization assays were performed to analyze the expression levels of miR-196a-5p in RM. THP-1 cells were treated with EVs, and qPCR and flow cytometry were performed to explore the polarization of macrophages. To explore the crosstalk between trophoblasts and macrophages, a coculture model and a series of cell function assays were performed. We first demonstrated that miR-196a-5p expression was higher in the cytotrophoblasts of villous tissues and plasma EVs from RM patients. miR-196a-5p derived from trophoblasts could be transferred into macrophages via EVs to induce M1 polarization via IκBα-mediated NF-κB pathway. Moreover, we found that M1 macrophages induced by EV miR-196a-5p derived from trophoblasts conversely regulated the proliferation, migration, and apoptosis of trophoblasts via TNF-α. This study indicated that trophoblast-derived EV miR-196a-5p was pos. associated with RM and functioned by regulating the crosstalk between trophoblasts and macrophages. These findings may attribute to identify a novel biomarker specific for RM.

Journal of Immunology Research published new progress about Apoptosis. 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

Chen, Jialin; Zhou, Renpeng; Liang, Yimin; Fu, Xiujun; Wang, Danru; Wang, Chen published the artcile< Blockade of lncRNA-ASLNCS5088-enriched exosome generation in M2 macrophages by GW4869 dampens the effect of M2 macrophages on orchestrating fibroblast activation>, Application of C30H30Cl2N6O2, the main research area is monocytic cell skin fibroblast lncRNA exosome macrophage GW4869; TGF-β1; exosome inhibitor; glutaminase; hypertrophic scar; microRNA.

In hypertrophic scar (HS) formation, the type 2 immune response induces the alternatively activated macrophages (M2), which manipulate fibroblasts to differentiate into myofibroblasts with active biol. functions and proliferation. Myofibroblasts express α-smooth muscle actin (α-SMA) and synthesize and produce addnl. collagen type I and collagen type III, inducing HS formation. However, studies on the mechanism of M2 macrophage modulation are only based on the recognition of profibrotic factors such as TGF-β1 secreted by macrophages. The influence of exosomes from M2 macrophages on scar formation is still unknown. Both M2 macrophages and myofibroblasts highly express glutaminases (GLSs). GLS is a critical enzyme in glutaminolysis and is important for M2 macrophage and fibroblast polarization. In this study, we found that in a TGF-β1-stimulated coculture system, a long noncoding RNA (lncRNA) named lncRNA-ASLNCS5088 was enriched in M2 macrophage-derived exosomes. This lncRNA could be transferred with high efficiency to fibroblasts and acted as an endogenous sponge to adsorb microRNA-200c-3p, resulting in increased GLS and α-SMA expression. Pretreatment with GW4869, which impairs M2 macrophage exosome synthesis, ameliorated these pathol. changes in fibroblasts in vitro. Local injection in the late scar formation period with GW4869 reduced α-SMA+ fibroblasts and alleviated the fibrosis of tissue after wound healing in vivo.

FASEB Journal published new progress about Collagen type I Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 6823-69-4 belongs to class imidazoles-derivatives, and the molecular formula is C30H30Cl2N6O2, Application of C30H30Cl2N6O2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Jiang, Ming-jie; Chen, Yi-yun; Dai, Juan-juan; Gu, Dian-na; Mei, Zhu; Liu, Fu-rao; Huang, Qian; Tian, Ling published the artcile< Dying tumor cell-derived exosomal miR-194-5p potentiates survival and repopulation of tumor repopulating cells upon radiotherapy in pancreatic cancer>, Product Details of C30H30Cl2N6O2, the main research area is pancreatic cancer miR1945p proliferation DNA damage; Aspirin; DNA damage response; Exosome; Pancreatic cancer; Radiotherapy; Tumor repopulating cell; Tumor repopulation; microRNA.

Tumor repopulation is a major cause of radiotherapy failure. However, TRCs also suffer DNA damage after radiotherapy, and might undergo mitotic catastrophe under the stimulation of proliferative factors released by dying cells. Hence, we intend to find out how these paradoxical biol. processes coordinated to potentiate tumor repopulation after radiotherapy. Tumor repopulation models in vitro and in vivo were used for evaluating the therapy response and dissecting underlying mechanisms. RNA-seq was performed to find out the signaling changes and identify the significantly changed miRNAs. qPCR, western blot, IHC, FACS, colony formation assay, etc. were carried out to analyze the mols. and cells. Exosomes derived from dying tumor cells induced G1/S arrest and promoted DNA damage response to potentiate survival of TRCs through delivering miR-194-5p, which further modulated E2F3 expression. Moreover, exosomal miR-194-5p alleviated the harmful effects of oncogenic HMGA2 under radiotherapy. After a latent time, dying tumor cells further released a large amount of PGE2 to boost proliferation of the recovered TRCs, and orchestrated the repopulation cascades. Of note, low-dose aspirin was found to suppress pancreatic cancer repopulation upon radiation via inhibiting secretion of exosomes and PGE2. Exosomal miR-194-5p enhanced DNA damage response in TRCs to potentiate tumor repopulation. Combined use of aspirin and radiotherapy might benefit pancreatic cancer patients.

Molecular Cancer published new progress about Animal gene Role: BSU (Biological Study, Unclassified), BIOL (Biological Study) (TAZ). 6823-69-4 belongs to class imidazoles-derivatives, and the molecular formula is C30H30Cl2N6O2, Product Details of C30H30Cl2N6O2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Eslamloo, Khalil; Ghorbani, Atefeh; Xue, Xi; Inkpen, Sabrina M.; Larijani, Mani; Rise, Matthew L. published the artcile< Characterization and transcript expression analyses of atlantic cod viperin.>, Application In Synthesis of 452-06-2, the main research area is Gadus viperin transcript expression immune response; Gadus morhua; dsRNA; inhibition of antiviral responses; qPCR; rsad2; teleost ISGs.

Viperin is a key antiviral effector in immune responses of vertebrates including the Atlantic cod (Gadus morhua). Using cloning, sequencing and gene expression analyses, we characterized the Atlantic cod viperin at the nucleotide and hypothetical amino acid levels, regulating factors were investigated. Using computational modeling, we show that the Atlantic cod Viperin forms similar overall protein architecture compared to mammalian Viperins. qPCR revealed that viperin is a weakly expressed transcript during embryonic development of Atlantic cod. In adults, the highest constitutive expression of viperin transcript was found in blood compared with 18 other tissues. Using isolated macrophages and synthetic dsRNA stimulation, we tested various immune inhibitors to determine the possible regulating pathways of Atlantic cod viperin. Atlantic cod viperin showed a comparable pIC induction to other well-known antiviral genes (e.g., interferon gamma and interferon-stimulated gene 15-1) in response to various immune inhibitors. The pIC induction of Atlantic cod viperin was significantly inhibited with 2-Aminopurine, Chloroquine, SB202190, and Ruxolitinib. Therefore, endosomal-TLR-mediated pIC recognition and signal transducers downstream of the TLR-dependent pathway may activate the gene expression response of Atlantic cod viperin. Also, these results suggest that antiviral responses of Atlantic cod viperin may be transcriptionally regulated through the interferon-activated pathway.

Frontiers in Immunology published new progress about Activating transcription factors Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

Lin, Fang; Wang, Hao; Liu, Wei; Li, Jing published the artcile< Zero-dimensional ionic antimony halide inorganic-organic hybrid with strong greenish yellow emission>, Recommanded Product: 1-carboxymethyl-3-methylimidazolium chloride, the main research area is ionic antimony halide inorganic organic hybrid greenish yellow emission; crystallog ionic antimony halide inorganic organic hybrid.

Here, we reported a new zero-dimensional ionic antimony halide inorganic-organic hybrid structure, H3SbBr6(L)6 (L = 2-(3-methyl-1H-imidazol-3-ium-1-yl)acetate). The inorganic component is a mol. SbBr63- anion with an octaheral geometry for the metal. Each individual anion is surrounded by six organic ligands. The compound emits bright green-yellow light with high quantum efficiency (IQY = 55% at λex = 360 nm). Combined with its low toxicity and high stability, the title compound serves as a good example of lighting phosphors based on antimony halide hybrid materials.

Journal of Materials Chemistry C: Materials for Optical and Electronic Devices published new progress about Band structure. 700370-07-6 belongs to class imidazoles-derivatives, and the molecular formula is C6H9ClN2O2, Recommanded Product: 1-carboxymethyl-3-methylimidazolium chloride.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Shi, Fei; Deng, Zheng; Zhou, Zheng; Jiang, Bo; Jiang, Chen-Yi; Zhao, Rui-Zhe; Sun, Feng; Cui, Di; Sun, Meng-Hao; Sun, Qian; Wang, Xing-Jie; Wu, Qi; Xia, Shu-Jie; Han, Bang-Min published the artcile< Heat injured stromal cells-derived exosomal EGFR enhances prostatic wound healing after thulium laser resection through EMT and NF-κB signaling>, Computed Properties of 6823-69-4, the main research area is thulium nuclearfactor Epithelial mesenchymal transition epidermalgrowth factorreceptor stromalcell woundhealing; benign prostatic hyperplasia (BPH); epidermal growth factor receptor (EGFR); exosome; nuclear factor-kappa B (NF-κB); shallow heat injury; wound healing.

This study investigated shallow heat injury to prostate stromal fibroblasts and epithelial cells and their interaction to regulate the wound healing and the underlying mol. events. Prostate stromal fibroblasts and epithelial cells were cultured individually or cocultured and subjected to shallow heat injury for assessments of cell proliferation, migration, apoptosis, cell cycle distribution, and gene expression. The supernatant of heat-injured WPMY-1 cells was collected for exosome extraction and assessments. Furthermore, beagle dogs received thulium laser resection of the prostate (TmLRP) and randomly divided into Gefitinib, GW4869, and control treatment for the histol. anal., tissue re-epithelialization, and epidermal growth factor receptor (EGFR) expression on the prostatic wound surface. Immunofluorescence was to evaluate p63-pos. basal progenitor cell trans-differentiation and macrophage polarization and ELISA was to detect cytokine levels in beagles’ urine. Shallow heat injury caused these cells to enter a stressed state and enhanced their crosstalk. The prostate stromal fibroblasts produced and secreted more exosomal-EGFR and other cytokines and chemokines after shallow heat injury, resulting in increased proliferation and migration of prostate epithelial cells during wound healing. The wound healing of the canine prostatic urethra following the TmLRP procedure was slower in the Gefitinib and GW4869 treatment group than in the control group of animals. Immunofluorescence and ELISA showed that reduced EGFR expression interrupted macrophage polarization but increased the inflammatory response. Shallow heat injury was able to promote the interaction of prostate stromal cells with prostate epithelial cells to enhance wound healing. Stromal-derived exosomal-EGFR plays a crucial role in the balance of the macrophage polarization and prostatic wound healing.

Prostate (Hoboken, NJ, United States) published new progress about Apoptosis. 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