Author: Jessica.F

Vuckovic, Slavica; Vandyke, Kate; Rickards, David A.; McCauley Winter, Padraig; Brown, Simon H. J.; Mitchell, Todd W.; Liu, Jun; Lu, Jun; Askenase, Philip W.; Yuriev, Elizabeth; Capuano, Ben; Ramsland, Paul A.; Hill, Geoffrey R.; Zannettino, Andrew C. W.; Hutchinson, Andrew T. published the artcile< The cationic small molecule GW4869 is cytotoxic to high phosphatidylserine-expressing myeloma cells>, Synthetic Route of 6823-69-4, the main research area is cationic small mol phosphatidylserine express myeloma cell; GW4869; multiple myeloma; phosphatidylserine; small molecule.

Summary : We have discovered that a small cationic mol., GW4869, is cytotoxic to a subset of myeloma cell lines and primary myeloma plasma cells. Biochem. anal. revealed that GW4869 binds to anionic phospholipids such as phosphatidylserine – a lipid normally confined to the intracellular side of the cell membrane. However, interestingly, phosphatidylserine was expressed on the surface of all myeloma cell lines tested (n = 12) and 9/15 primary myeloma samples. Notably, the level of phosphatidylserine expression correlated well with sensitivity to GW4869. Inhibition of cell surface phosphatidylserine exposure with brefeldin A resulted in resistance to GW4869. Finally, GW4869 was shown to delay the growth of phosphatidylserine-high myeloma cells in vivo. To the best of our knowledge, this is the first example of using a small mol. to target phosphatidylserine on malignant cells. This study may provide the rationale for the development of phosphatidylserine-targeting small mols. for the treatment of surface phosphatidylserine-expressing cancers.

British Journal of Haematology published new progress about Antitumor agents. 6823-69-4 belongs to class imidazoles-derivatives, and the molecular formula is C30H30Cl2N6O2, Synthetic Route of 6823-69-4.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Geraschenko, Oleksandr V.; Solomin, Vitalii V.; Vashchenko, Bohdan V.; Khodakivskyi, Pavlo; Tolmachev, Andrey A.; Grygorenko, Oleksandr O. published the artcile< Synthesis and chemical transformations of diazolyl α,α-difluoroacetates>, HPLC of Formula: 1003-21-0, the main research area is hetaryl difluoroacetate preparation chem transformation; glyoxylate hetaryl deoxofluorination.

Optimized protocols for the synthesis of diazolyl α,α-difluoroacetates RC(F)2C(O)OEt (R = 1-methyl-1H-imidazol-2-yl, 1,3-thiazol-2-yl, 1-methyl-1H-1,3-benzodiazol-2-yl, etc.) via deoxofluorination of the corresponding glyoxylates RC(O)C(O)OEt with Morph-DAST are described. The method allowed the preparation of the title fluoridated building blocks in 73-96% yield on up to 15 g scale. Utility of the hetaryl α,α-difluoroacetates was demonstrated by the synthesis of advanced building blocks for medicinal chem., i.e. carboxylic acids RC(F)2C(O)OH/RC(F)2C(O)OH.HCl, amides RC(F)2C(O)NH2, nitriles RC(F)2CN, and alcs. RC(F)2CH2OH.

Journal of Fluorine Chemistry published new progress about Aromatic amides Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 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

Stachelska-Wierzchowska, Alicja; Wierzchowski, Jacek; Gorka, Michal; Bzowska, Agnieszka; Stolarski, Ryszard; Wielgus-Kutrowska, Beata published the artcile< Tricyclic nucleobase analogs and their ribosides as substrates and inhibitors of purine-nucleoside phosphorylases III. Aminopurine derivatives>, Formula: C5H5N5, the main research area is NMR; chemo-enzymatic synthesis; enzyme-substrate complexes; fluorescence; nucleobase/nucleoside analogs; purine nucleoside phosphorylase.

Etheno-derivatives of 2-aminopurine, 2-aminopurine riboside, and 7-deazaadenosine (tubercidine) were prepared and purified using standard methods. 2-Aminopurine reacted with aqueous chloroacetaldehyde to give two products, both exhibiting substrate activity towards bacterial (E. coli) purine-nucleoside phosphorylase (PNP) in the reverse (synthetic) pathway. The major product of the chem. synthesis, identified as 1,N2-etheno-2-aminopurine, reacted slowly, while the second, minor, but highly fluorescent product, reacted rapidly. NMR anal. allowed identification of the minor product as N2,3-etheno-2-aminopurine, and its ribosylation product as N2,3-etheno-2-aminopurine-N2-β-D-riboside. Ribosylation of 1,N2-etheno-2-aminopurine led to analogous N2-β-d-riboside of this base. Both enzymically produced ribosides were readily phosphorolyzed by bacterial PNP to the resp. bases. The reaction of 2-aminopurine-N9-β-D-riboside with chloroacetaldehyde gave one major product, clearly distinct from that obtained from the enzymic synthesis, which was not a substrate for PNP. A tri-cyclic 7-deazaadenosine (tubercidine) derivative was prepared in an analogous way and shown to be an effective inhibitor of the E. coli, but not of the mammalian enzyme. Fluorescent complexes of amino-purine analogs with E. coli PNP were observed

Molecules published new progress about 452-06-2. 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Formula: C5H5N5.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Czernecki, Dariusz; Hu, Haidai; Romoli, Filippo; Delarue, Marc published the artcile< Structural dynamics and determinants of 2-aminoadenine specificity in DNA polymerase DpoZ of vibriophage ϕVC8>, Electric Literature of 452-06-2, the main research area is Thermus DNA polymerase DpoZ vibriophage 2 aminoadenine.

All genetic information in cellular life is stored in DNA copolymers composed of four basic building blocks (ATGC-DNA). In contrast, a group of bacteriophages belonging to families Siphoviridae and Podoviridae has abandoned the usage of one of them, adenine (A), replacing it with 2-aminoadenine (Z). The resulting ZTGC-DNA is more stable than its ATGC-DNA counterpart, owing to the addnl. hydrogen bond present in the 2-aminoadenine:thymine (Z:T) base pair, while the addnl. amino group also confers resistance to the host endonucleases. Recently, two classes of replicative proteins found in ZTGC-DNA-containing phages were characterized and one of them, DpoZ from DNA polymerase A (PolA) family, was shown to possess significant Z-vs-A specificity. Here, we present the crystallog. structure of the apo form of DpoZ of vibriophage ϕVC8, composed of the 3-5 exonuclease and polymerase domains. We captured the enzyme in two conformations that involve the tip of the thumb subdomain and the exonuclease domain. We highlight insertions and mutations characteristic of ϕVC8 DpoZ and its close homologues. Through mutagenesis and functional assays we suggest that the preference of ϕVC8 DpoZ towards Z relies on a polymerase backtracking process, more efficient when the nascent base pair is A:T than when it is Z:T.

Nucleic Acids Research published new progress about Crystal structure. 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

Xu, Yuancong; Cheng, Nan; Luo, Yunbo; Huang, Kunlun; Chang, Qiaoying; Pang, Guofang; Xu, Wentao published the artcile< An Exo III-assisted catalytic hairpin assembly-based self-fluorescence aptasensor for pesticide detection>, Computed Properties of 452-06-2, the main research area is exonuclease catalytic hairpin assembly fluorescence aptasensor pesticide detection.

This study proposed a self-fluorescence aptasensor (SFA) based on an Exo III-assisted catalytic hairpin assembly (EACHA) for pesticide detection. The aptamer in this sensor can specifically recognize the target due to the favorable biol. binding affinity and also can drive the EACHA by modifying the spatial configuration. EACHA was designed as a cyclic amplification process that improved the rate of reused aptamer beacon fuel, and increased the detection efficiency and sensitivity. The signal was applied using the 2-aminopurine (2AP) mol., the fluorescence of which could be quenched via stacking interaction with the adjacent bases in the beacon. Given its fluorescent properties, this design achieved low background anal. with high sensitivity. Chlorpyrifos was used as a model to explore the SFA proof-of-concept. By replacing the aptamer, this method can be extended to other pesticide mols. Therefore, this study may become a powerful tool for quant. detection of various targets for different purposes.

Sensors and Actuators, B: Chemical published new progress about Aptasensors. 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Computed Properties of 452-06-2.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Carvalho, Thiago O.; Carvalho, Pedro H. P. R.; Correa, Jose R.; Guido, Bruna C.; Medeiros, Gisele A.; Eberlin, Marcos N.; Coelho, Sara E.; Domingos, Josiel B.; Neto, Brenno A. D. published the artcile< Palladium Catalyst with Task-Specific Ionic Liquid Ligands: Intracellular Reactions and Mitochondrial Imaging with Benzothiadiazole Derivatives>, Recommanded Product: 1-carboxymethyl-3-methylimidazolium chloride, the main research area is palladium catalyst ionic liquid ligand mitochondria imaging benzothiadiazole.

A water-soluble and charge-tagged palladium complex (PdMAI) was found to function inside breast cancer live cells of the MCF-7 lineage as an efficient catalyst for cross-coupling reaction. PdMAI, bearing two ionophilic task-specific ionic liquids as ligands, efficiently catalyzed both in cellulo Suzuki and Buchwald-Hartwig amination reactions. For the first time, therefore, the Buchwald-Hartwig amination is described to occur inside the highly complex cellular environment. The 2,1,3-benzothiadiazole (BTD) core was used as the base for the syntheses, and two π-extended fluorescent derivatives (BTD-2APy) and (BTD-1AN), which were found to emit in the green and red channels, had impressive mitochondrial affinity. These chromophores allowed for selective mitochondrial imaging and tracking.

Journal of Organic Chemistry published new progress about Benzothiadiazoles Role: BUU (Biological Use, Unclassified), SPN (Synthetic Preparation), BIOL (Biological Study), USES (Uses), PREP (Preparation). 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

Hao, Xueyu; Wang, Chunyu; Wang, Yu; Li, Chunjie; Hou, Jingwei; Zhang, Feng; Kang, Chuanqing; Gao, Lianxun published the artcile< Topological conversion of human telomeric G-quadruplexes from hybrid to parallel form induced by naphthalene diimide ligands>, Name: 7H-Purin-2-amine, the main research area is naphthalene diimide G quadruplex telomere regulation; G-quadruplex; Human telomere; Naphthalene diimide; Topological conversion.

G-quadruplexes (GQs) have become promising anti-cancer therapeutic targets, which are formed by the folding of a guanine-rich repeat DNA/RNA sequence at human telomeres or oncogene promoters. Polymorphism has been observed for the folding topologies of intramol. GQs. Here we report the topol. conversion of human telomeric GQ induced by naphthalene diimide (NDI) ligands in K+ solution The ligands selectively induce metastable hybrid-type GQs to highly stable parallel-type GQ at physiol. temperature (37°C) in dilute aqueous solutions and under crowding conditions that mimic cellular bioenvironment. According to spectroscopic analyses, the topol. conversion is speculated to undergo stepwise unfolding of hybrid-type GQ through intermediate states to parallel-type GQ. The results will prompt further studies on the designs of ligands with GQ conformation regulation functions and nanotechnol. systems based on nucleic acids with dynamic regulation of GQ conformation.

International Journal of Biological Macromolecules published new progress about Animal gene, c-myc Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 452-06-2 belongs to class imidazoles-derivatives, and the molecular formula is C5H5N5, Name: 7H-Purin-2-amine.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Hornum, Mick; Stendevad, Julie; Sharma, Pawan K.; Kumar, Pawan; Nielsen, Rasmus B.; Petersen, Michael; Nielsen, Poul published the artcile< Base-Pairing Properties of Double-Headed Nucleotides>, Electric Literature of 452-06-2, the main research area is base pair double headed nucleotide DNA duplex; 2,6-diaminopurine; double-headed nucleotides; hypoxanthine; oligonucleotides.

Nucleotides that contain two nucleobases (double-headed nucleotides) have the potential to condense the information of two sep. nucleotides into one. This presupposes that both bases must successfully pair with a cognate strand. Here, double-headed nucleotides that feature cytosine, guanine, thymine, adenine, hypoxanthine, and diaminopurine linked to the C2′-position of an arabinose scaffold were developed and examined in full detail. These monomeric units were efficiently prepared by convergent synthesis and incorporated into DNA oligonucleotides by means of the automated phosphoramidite method. Their pairing efficiency was assessed by UV-based melting-temperature anal. in several contexts and extensive mol. dynamics studies. Altogether, the results show that these double-headed nucleotides have a well-defined structure and invariably behave as functional dinucleotide mimics in DNA duplexes.

Chemistry – A European Journal published new progress about DNA-DNA hybridization. 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

Yuan, Xiaoqiu; Li, Tiefeng; Shi, Lei; Miao, Jinhao; Guo, Yongfei; Chen, Yu published the artcile< Human umbilical cord mesenchymal stem cells deliver exogenous miR-26a-5p via exosomes to inhibit nucleus pulposus cell pyroptosis through METTL14/NLRP3>, Recommanded Product: p-Benzenediacrylanilide, 4′,4′′-di-2-imidazolin-2-yl-, dihydrochloride, the main research area is miR26a5p METTL14 NLRP3 IGF2BP2 GW4869 nucleus pulposus cell pyroptosis; Exosomal miR-26a-5p; Intervertebral disc degeneration; N6-methyladenosine; Pyroptosis; Umbilical cord mesenchymal stem cells.

Intervertebral disk degeneration (IVDD) is the breakdown of the disks supporting the vertebrae. It is one of the most frequent causes of back pain worldwide. Currently, the clin. interventions for IVDD are mainly focused on symptom releases. Thus, new therapeutic options are needed. Nucleus pulposus (NP) samples were obtained from 20 patients experiencing IVDD and 10 healthy volunteers compared for mRNA N6-methyladenosine (m6A) mRNA modification as well as methyltransferase (METT) like METTL3, METTL14, and Wilms’ tumor 1-associated protein mRNA and protein abundance following exosomes exposure from mesenchymal stem cells. In addition, microRNA expressions were also compared. The correlation between the NLR family pyrin domain containing 3 (NLRP3) and METTL14 was measured by luciferase reporter assay. Cytokines were evaluated using an ELISA. METTL14, NLRP3, and insulin-like growth factor 2 mRNA-binding protein 2 mRNAs were measured via a quant. reverse transcription-polymerase chain reaction. Protein was assayed using western blots. Cell death was assessed by propidium iodide staining, lactate dehydrogenase release, gasdermin-N domain abundance, and caspase-1 activation. The human umbilical cord mesenchymal stem cell (hucMSC) exosomes were found to effectively improve the viability of NP cells and protect them from pyroptosis through targeting METTL14, with a methyltransferase catalyzing m6A modification. METTL14 was highly present in NP cells from IVDD patients, which stabilize NLRP3 mRNA in an IGFBP2-dependent manner. The elevated NLRP3 levels result in the increase of interleukin 1β (IL-1β) and IL-18 levels and trigger pyroptotic NP cell death. Such pathogenic axis could be blocked by hucMSC exosomes, which directly degrade METTL14 through exosomal miR-26a-5p. The results of the current study revealed the beneficial effects of hucMSC exosomes on NP cells and determined a potential mechanism inducing IVDD.

Molecular Medicine (London, United Kingdom) published new progress about 3′-Untranslated region 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

Kaiser, Carl; Spagnuolo, Ciro J.; Adams, Theodore C. Jr.; Audia, Vicki H.; Dupont, Andrea C.; Hatoum, Holia; Lowe, Valerie C.; Prosser, Judith C.; Sturm, Bonnie L.; Noronha-Blob, Lalita published the artcile< Synthesis and antimuscarinic properties of some N-substituted 5-(aminomethyl)-3,3-diphenyl-2(3H)-furanones>, SDS of cas: 36947-69-0, the main research area is aminomethyldiphenylfuranone antimuscarinic structure activity; furanone aminomethyldiphenyl antimuscarinic structure activity; urinary incontinence treatment imidazolylmethyldiphenylfuranone; benactyzine constrained analog structure activity.

In a study aimed toward developing new, selective antimuscarinic drugs with potential utility in the treatment of urinary incontinence associated with bladder muscle instability, a series of N-substituted 5-(aminomethyl)-3,3-diphenyl-2(3H)-furanones I (R = Me, R1 = alkyl, aralkyl; R = R1 = Et, Pr; NRR1 = pyrrolidino, N-methylpiperazino, N-phenylpiperazino, morpholino, substituted imidazol-1-yl, substituted pyrazol-1-yl, triazol-1-yl, substituted imidazopyridin-1-yl, etc.), conformationally-constrained lactone relatives of benactyzine, was prepared The compounds were examined in several paradigms that measure muscarinic (M1, M2, and M3) receptor antagonist activity. Selected members of the series that displayed potency and/or selectivity in these tests were studied for their effects on urinary bladder contraction, mydriasis, and salivation in guinea pigs. These studies revealed that incorporation of the amino functionality into an imidazole or pyrazole ring resulted in some novel, potent, and selective antimuscarinic agents. Appropriate alkyl substitution of position 2 of the imidazole strikingly affected muscarinic, particularly M3, receptor activity and may reflect a complementary site of interaction. Some of the compounds selectively reduced bladder pressure in a cystometrogram (CMG) model without producing concomitant mydriatic and salivary effects. The sep. and distinct action of several compounds of this series in these in vivo protocols suggests the possibility of subtypes of muscarinic receptors that may correspond to previously characterized mol. cloned subpopulations. Structure-activity relationships of this series of substituted lactones are discussed. These studies led to the identification of (R)-isomer II as a clin. candidate for treating urinary bladder dysfunction.

Journal of Medicinal Chemistry published new progress about Muscarinic antagonists. 36947-69-0 belongs to class imidazoles-derivatives, and the molecular formula is C7H12N2, SDS of cas: 36947-69-0.

Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem