Month: December 2022

Strahlhofer-Augsten, Manuela published the artcileThe Distinct Role of the HDL Receptor SR-BI in Cholesterol Homeostasis of Human Placental Arterial and Venous Endothelial Cells, Product Details of C12H23N3S, the publication is International Journal of Molecular Sciences (2022), 23(10), 5364, database is CAplus and MEDLINE.

As opposed to adults, high-d. lipoprotein (HDL) is the main cholesterol carrying lipoprotein in fetal circulation. The major HDL receptor, scavenger receptor class B type I (SR-BI), contributes to local cholesterol homeostasis. Arterial endothelial cells (ECA) from human placenta are enriched with cholesterol compared to venous endothelial cells (ECV). Moreover, umbilical venous and arterial plasma cholesterol levels differ markedly. We tested the hypothesis that the uptake of HDL-cholesteryl esters differs between ECA and ECV because of the differential expression of SR-BI. We aimed to identify the key regulators underlying these differences and the functional consequences. Immunohistochem. was used for visualization of SR-BI in situ. ECA and ECV were isolated from the chorionic plate of human placenta and used for RT-qPCR, Western Blot, and HDL uptake assays with 3H- and 125I-labeled HDL. DNA was extracted for the methylation profiling of the SR-BI promoter. SR-BI regulation was studied by exposing ECA and ECV to differential oxygen concentrations or shear stress. Our results show elevated SR-BI expression and protein abundance in ECA compared to ECV in situ and in vitro. Immunohistochem. demonstrated that SR-BI is mainly expressed on the apical side of placental endothelial cells in situ, allowing interaction with mature HDL circulating in the fetal blood. This was functionally linked to a higher increase of selective cholesterol ester uptake from fetal HDL in ECA than in ECV, and resulted in increased cholesterol availability in ECA. SR-BI expression on ECV tended to decrease with shear stress, which, together with heterogeneous immunostaining, suggests that SR-BI expression is locally regulated in the placental vasculature. In addition, hypomethylation of several CpG sites within the SR-BI promoter region might contribute to differential expression of SR-BI between chorionic arteries and veins. Therefore, SR-BI contributes to a local cholesterol homeostasis in ECA and ECV of the human feto-placental vasculature.

International Journal of Molecular Sciences published new progress about 321673-30-7. 321673-30-7 belongs to amides-buliding-blocks, auxiliary class Immunology/Inflammation,Scavenger receptor, name is [(2-Hexylcyclopentylidene)amino]thiourea, and the molecular formula is C6HBrF4O, Product Details of C12H23N3S.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Sherbiny, Farag F. published the artcileHomology modelling of the human adenosine A_2B receptor based on x-ray structures of bovine rhodopsin, the β₂-adrenergic receptor and the human adenosine A_2A receptor, Category: amides-buliding-blocks, the publication is Journal of Computer-Aided Molecular Design (2009), 23(11), 807-828, database is CAplus and MEDLINE.

A three-dimensional model of the human adenosine A_2B receptor was generated by means of homol. modeling, using the crystal structures of bovine rhodopsin, the β₂-adrenergic receptor, and the human adenosine A_2A receptor as templates. In order to compare the three resulting models, the binding modes of the adenosine A_2B receptor antagonists theophylline, ZM241385, MRS1706, and PSB601 were investigated. The A_2A-based model was much better able to stabilize the ligands in the binding site than the other models reflecting the high degree of similarity between A_2A and A_2B receptors: while the A_2B receptor shares about 21% of the residues with rhodopsin, and 31% with the β₂-adrenergic receptor, it is 56% identical to the adenosine A_2A receptor. The A_2A-based model was used for further studies. The model included the transmembrane domains, the extracellular and the intracellular hydrophilic loops as well as the terminal domains. In order to validate the usefulness of this model, a docking anal. of several selective and nonselective agonists and antagonists was carried out including a study of binding affinities and selectivities of these ligands with respect to the adenosine A_2A and A_2B receptors. A common binding site is proposed for antagonists and agonists based on homol. modeling combined with site-directed mutagenesis and a comparison between exptl. and calculated affinity data. The new, validated A_2B receptor model may serve as a basis for developing more potent and selective drugs.

Journal of Computer-Aided Molecular Design published new progress about 264622-53-9. 264622-53-9 belongs to amides-buliding-blocks, auxiliary class GPCR/G Protein,Adenosine Receptor, name is N-(4-Acetylphenyl)-2-(4-(2,6-dioxo-1,3-dipropyl-2,3,6,9-tetrahydro-1H-purin-8-yl)phenoxy)acetamide, and the molecular formula is C9H21NO3, Category: amides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Gompper, Rudolf published the artcile2,4-Bis(dialkylamino)-5-ethylidene-4,5-dihydro-1,3-thiazole and 2,4-bis(dimethylamino)-5-vinyl-1,3-thiazole, SDS of cas: 14294-10-1, the publication is Synthesis (1981), 647-8, database is CAplus.

Reaction of Me₂NCR:NCSR¹ (I; R = R¹ = Me₂N; R = H, R¹ = morpholino) with BrCH₂CH:CH₂ gave an azavinaminidinium salt which upon treatment with NaNH₂/NH₃ or KOCMe₃ gave the ethylidenethiazolines II, which upon heating or treatment with 4-MeC₆H₄SO₃H rearranged to III. Reaction of the azavinamidinium salt from I (R = R¹ = NMe₂) with NaH in THF gave IV (R² = H), which upon reaction with HBF₄ gave II.HBF₄ (R = H, R¹ = NMe₂) and with PhNCS gave IV (R² = PhNHCS).

Synthesis published new progress about 14294-10-1. 14294-10-1 belongs to amides-buliding-blocks, auxiliary class Morpholine,Thiourea,Amine,Amide, name is Morpholine-4-carbothioamide, and the molecular formula is C5H10N2OS, SDS of cas: 14294-10-1.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Younis, Osama published the artcileSolid-State Luminescent Materials Containing Both Indole and Pyrimidine Moieties: Design, Synthesis, and Density Functional Theory Calculations, Recommanded Product: 2-Chloroacetamide, the publication is ACS Omega (2022), 7(17), 15016-15026, database is CAplus and MEDLINE.

Heterocyclic compounds with effective solid-state luminescence offer a wide range of uses. It has been observed that combining pyrimidine and indole moieties in a single mol. can enhance material behavior dramatically. Here, different heterocyclic compounds with indole and pyrimidine moieties have been synthesized effectively, and their structures have been validated using NMR, IR, and mass spectroscopy. The photoluminescence behavior of two substances was investigated in powder form and solutions of varying concentrations After aggregation, one mol. displayed a red shifted luminescence spectrum, whereas another homolog showed a blueshift. Thus, d. functional theory calculations were carried out to establish that introducing a terminal group allows modifying of the luminescence behavior by altering the mol. packing. Because of the non-planarity, intermol. interactions, and tiny intermol. distances within the dimers, the materials demonstrated a good emission quantum yield (Φ_em) in the solid state (ex. 25.6%). At high temperatures, the compounds also demonstrated a stable emission characteristic.

ACS Omega published new progress about 79-07-2. 79-07-2 belongs to amides-buliding-blocks, auxiliary class Chloride,Amine,Aliphatic hydrocarbon chain,Amide,Inhibitor, name is 2-Chloroacetamide, and the molecular formula is C9H8BNO2, Recommanded Product: 2-Chloroacetamide.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Pensato, Soccorsa published the artcileγ-Hydroxymethyl PNAs: Synthesis, interaction with DNA and inhibition of protein/DNA interactions, Synthetic Route of 186046-83-3, the publication is Bioorganic Chemistry (2010), 38(5), 196-201, database is CAplus and MEDLINE.

The ability of peptide nucleic acids (PNAs) to interact with double-stranded DNA has been recently investigated. In a decoy approach these interactions are of great importance as may lead to inhibition of interactions of DNA sequences to specific transcription factors and may be employed as a strategy for the inhibition of gene transcription alternative to the antisense strategy (targeting transcription factors mRNAs) and the transcription factor decoy approach (targeting transcription factors). The ability of PNA and PNAs with modified monomers to bind to DNA and to interfere in the formation of DNA/transcription factor complex was explored. A procedure is reported for the synthesis of Fmoc-γ-hydroxymethyl PNA, and the synthesis and CD anal. of PNA oligomers containing the modified monomer in different positions, and EMSA assays are described to test the (a) binding to double-stranded DNA and (b) inhibition of DNA-protein interactions.

Bioorganic Chemistry published new progress about 186046-83-3. 186046-83-3 belongs to amides-buliding-blocks, auxiliary class Purine,Carboxylic acid,Amine,Benzene,Amide,Others,PNA,, name is 2-(N-(2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)ethyl)-2-(2-(((benzhydryloxy)carbonyl)amino)-6-oxo-5H-purin-9(6H)-yl)acetamido)acetic acid, and the molecular formula is C40H35N7O8, Synthetic Route of 186046-83-3.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

De Marzo, Vincenzo published the artcileNetwork meta-analysis of medical therapy efficacy in more than 90,000 patients with heart failure and reduced ejection fraction, Name: (S)-2-(N-((2′-(1H-Tetrazol-5-yl)-[1,1′-biphenyl]-4-yl)methyl)pentanamido)-3-methylbutanoic acid, the publication is Journal of Internal Medicine (2022), 292(2), 333-349, database is CAplus and MEDLINE.

Meta-anal. of Following the availability of new drugs for chronic heart failure (HF) with reduced ejection fraction (HFrEF), we sought to provide an updated and comparative synthesis of the evidence on HFrEF pharmacotherapy efficacy. We performed a Bayesian network meta-anal. of phase 2 and 3 randomized controlled trials (RCTs) of medical therapy in HFrEF patient cohorts with more than 90% of the participants with left ventricular ejection fraction less than 45% and all-cause mortality reported. Sixty-nine RCTs, accounting for 91,741 subjects, were evaluated. The step-wise introduction of new drugs progressively decreased the risk of all-cause death, up to reaching a random-effects hazard ratio (HR) of 0.43 (95% credible intervals [CrI] 0.27-0.63) with beta blockers (BB), angiotensin-converting enzyme inhibitors (ACEi), and mineralocorticoid receptor antagonist (MRA) vs. placebo. The risk was further reduced by adding sodium-glucose cotransporter-2 inhibitors (SGLT2i; HR 0.38, 95% CrI 0.22-0.60), ivabradine (HR 0.39, 95% CrI 0.21-0.64), or vericiguat (HR 0.40, 95% CrI 0.22-0.65) to neurohormonal inhibitors, and by angiotensin receptor-neprilysin inhibitor (ARNI), BB, and MRA (HR 0.36, 95% CrI 0.20-0.60). In a sensitivity anal. considering the ARNI and non-ARNI subgroups of SGLT2i RCTs, the combination SGLT2i + ARNI + BB + MRA was associated with the lowest HR (0.28, 95% CrI 0.16-0.45 vs. 0.40, 95% CrI 0.24-0.60 for SGLT2i + BB + ACEi + MRA). Consistent results were obtained in sensitivity analyses and by calculating surface under the cumulative ranking area, as well as for cardiovascular mortality (information available for 56 RCTs), HF hospitalization (45 RCTs), and all-cause hospitalization (26 RCTs). Combination medical therapy including neurohormonal inhibitors and newer drugs, especially ARNI and SGLT2i, confers the maximum benefit with regard to HFrEF prognosis.

Journal of Internal Medicine published new progress about 137862-53-4. 137862-53-4 belongs to amides-buliding-blocks, auxiliary class GPCR/G Protein,Angiotensin Receptor, name is (S)-2-(N-((2′-(1H-Tetrazol-5-yl)-[1,1′-biphenyl]-4-yl)methyl)pentanamido)-3-methylbutanoic acid, and the molecular formula is C24H29N5O3, Name: (S)-2-(N-((2′-(1H-Tetrazol-5-yl)-[1,1′-biphenyl]-4-yl)methyl)pentanamido)-3-methylbutanoic acid.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Edwards, Paul T. published the artcileProton Transfer on the Edge of the Salt/Cocrystal Continuum: X-Ray Photoelectron Spectroscopy of Three Isonicotinamide Salts, Recommanded Product: Isonicotinamide, the publication is Crystal Growth & Design (2021), 21(11), 6332-6340, database is CAplus.

XPS has emerged as a technique that allows for characterization and classification of hydrogen bonding and proton transfer interactions in organic crystal structures, in a way that is complementary to crystallog. by X-ray or neutron diffraction. Here, we analyze the nitrogen 1s core-level binding energies (BEs) of isonicotinamide (IN) systems with proton transfer between donor and acceptor groups at short distances. We show how a careful calibration of the BE scale places these salt systems correctly on the edge of the so-called salt-cocrystal continuum. We show how performing a fitting anal. of the data that is consistent with elemental anal., expected stoichiometry, and quantification of adventitious carbon contamination facilitates the determination of absolute BEs with accuracy and reproducibility within ±0.1 eV. The determined N 1s core-level BEs of the protonated IN acceptors suggest that the local geometric arrangements of the donor, acceptor, and proton can influence the N 1s core-level BE significantly.

Crystal Growth & Design published new progress about 1453-82-3. 1453-82-3 belongs to amides-buliding-blocks, auxiliary class Pyridine,Amine,Amide, name is Isonicotinamide, and the molecular formula is C6H6N2O, Recommanded Product: Isonicotinamide.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Rusu, Georgeta published the artcileAntibacterial activity of urotropin salts of the oxazolidine series, Product Details of C7H5Cl2NO, the publication is Revista Medico-Chirurgicala (1988), 92(1), 133-6, database is CAplus.

Six urotropin salts of the oxazolidine series (I; R = Ph, substituted Ph) were prepared and their antimicrobial properties were determined Good activity was evident against Staphylococcus aureus, Bacillus subtilis, and Candida albicans.

Revista Medico-Chirurgicala published new progress about 2447-79-2. 2447-79-2 belongs to amides-buliding-blocks, auxiliary class Chloride,Amine,Benzene,Amide, name is 2,4-Dichlorobenzamide, and the molecular formula is C7H5Cl2NO, Product Details of C7H5Cl2NO.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Telore, Rahul D. published the artcilePush-pull fluorophores with viscosity dependent and aggregation induced emissions insensitive to polarity, Product Details of C5H10N2OS, the publication is Dyes and Pigments (2015), 359-367, database is CAplus.

A series of push-pull chromophoric extended styryls from 5,5′-(9-ethyl-9H-carbazole-3,6-diyl)bis(2-morpholinothiazole-4-carbaldehyde) were synthesized by Knoevenagal condensation reaction with active methylene compounds The intermediate carbaldehyde was synthesized from carbazole through multistep reactions. The intramol. charge transfer of synthesized highly conjugated sym. D-π-A (D-donor, A-acceptor) extended styryls with rigid structure have been investigated by means of photophys. properties. The photophys. properties like absorption, emission and quantum yield of styryl derivatives were evaluated in various solvents of different polarities. All these synthesized extended styryls have exhibited aggregation induced emission with enhanced fluorescence intensity. This series of compounds can also be used as fluorescence mol. rotors for viscosity sensing. The sensitivity of viscosity towards UV absorption as well as fluorescence emission has also been investigated.

Dyes and Pigments published new progress about 14294-10-1. 14294-10-1 belongs to amides-buliding-blocks, auxiliary class Morpholine,Thiourea,Amine,Amide, name is Morpholine-4-carbothioamide, and the molecular formula is C5H10O, Product Details of C5H10N2OS.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics

Matsumoto, Takuya published the artcileA catalytic one-step synthesis of peptide thioacids: the synthesis of leuprorelin via iterative peptide-fragment coupling reactions, Related Products of amides-buliding-blocks, the publication is Chemical Communications (Cambridge, United Kingdom) (2018), 54(86), 12222-12225, database is CAplus and MEDLINE.

A catalytic one-step synthesis of peptide thioacids was developed. The oxygen-sulfur atom exchange reaction converted the carboxy group at the C-terminus of the peptides into a thiocarboxy group with suppressed epimerization. This method was successfully applied to the synthesis of the peptide drug leuprorelin via an iterative fragment-coupling protocol.

Chemical Communications (Cambridge, United Kingdom) published new progress about 2418-95-3. 2418-95-3 belongs to amides-buliding-blocks, auxiliary class Chiral,Carboxylic acid,Amine,Aliphatic hydrocarbon chain,Ester,Amino acide derivatives, name is H-Lys(Boc)-OH, and the molecular formula is C11H22N2O4, Related Products of amides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics