Tag: M.W=300-350

Adams, Gregory L. published the artcileDevelopment of ProTx-II analogs as highly selective peptide blockers of Na_v1.7 for the treatment of pain, HPLC of Formula: 71989-31-6, the publication is Journal of Medicinal Chemistry (2022), 65(1), 485-496, database is CAplus and MEDLINE.

Inhibitor cystine knot peptides, derived from venom, have evolved to block ion channel function but are often toxic when dosed at pharmacol. relevant levels in vivo. The article describes the design of analogs of ProTx-II that safely display systemic in vivo blocking of Na_v1.7, resulting in a latency of response to thermal stimuli in rodents. The new designs achieve a better in vivo profile by improving ion channel selectivity and limiting the ability of the peptides to cause mast cell degranulation. The design rationale, structural modeling, in vitro profiles, and rat tail flick outcomes are disclosed and discussed.

Journal of Medicinal Chemistry published new progress about 71989-31-6. 71989-31-6 belongs to catalysis-chemistry, auxiliary class Amino acide derivatives,pyrrolidine, name is Fmoc-Pro-OH, and the molecular formula is C20H19NO4, HPLC of Formula: 71989-31-6.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Heuser, Michael published the artcileSafety and efficacy of BAY1436032 in IDH1-mutant AML: phase I study results, Formula: C17H37NO3, the publication is Leukemia (2020), 34(11), 2903-2913, database is CAplus and MEDLINE.

The mutant IDH1 (mIDH1) inhibitor BAY1436032 demonstrated robust activity in preclin. AML models, supporting clin. evaluation. In the current dose-escalation study, BAY1436032 was orally administered to 27 mIDH1 AML subjects across 4 doses ranging from 300 to 1500 mg twice-daily. BAY1436032 exhibited a relatively short half-life and apparent non-linear pharmacokinetics after continuous dosing. Most subjects experienced only partial target inhibition as indicated by plasma R-2HG levels. BAY1436032 was safe and a maximum tolerated dose was not identified. The median treatment duration for all subjects was 3.0 mo (0.49-8.5). The overall response rate was 15% (4/27; 1 CRp, 1 PR, 2 MLFS), with responding subjects experiencing a median treatment duration of 6.0 mo (3.9-8.5) and robust R-2HG decreases. Thirty percent (8/27) achieved SD, with a median treatment duration of 5.5 mo (3.1-7.0). Degree of R-2HG inhibition and clin. benefit did not correlate with dose. Although BAY1436032 was safe and modestly effective as monotherapy, the low overall response rate and incomplete target inhibition achieved at even the highest dose tested do not support further clin. development of this investigational agent in AML.

Leukemia published new progress about 17351-62-1. 17351-62-1 belongs to catalysis-chemistry, auxiliary class Salt,Amine, name is Tetrabutylammonium hydrogencarbonate, and the molecular formula is C17H37NO3, Formula: C17H37NO3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Lee, Sang Ju published the artcileSimple and highly efficient synthesis of 3′-deoxy-3′-[¹⁸F]fluorothymidine using nucleophilic fluorination catalyzed by protic solvent, Formula: C17H37NO3, the publication is European Journal of Nuclear Medicine and Molecular Imaging (2007), 34(9), 1406-1409, database is CAplus and MEDLINE.

The aim of this study was to develop a method of radiochem. synthesis of 3′-deoxy-3′-[¹⁸F]fluorothymidine ([¹⁸F]FLT) with an improved radiochem. yield using nucleophilic substitution catalyzed by protic solvent. We introduced t-BuOH as a new reaction solvent for nucleophilic [¹⁸F]fluorination with [¹⁸F]fluoride using (5′-O-DMTr-2′-deoxy-3′-O-furanosyl-¦Â-D-threo-pentofuranosyl)-3-N-BOC-thymine to synthesize [¹⁸F]FLT. [¹⁸F]F^– was eluted with (1) tetrabutylammonium bicarbonate (TBAHCO₃), (2) Cs₂CO₃ and kryptofix 2.2.2 (K₂₂₂) after trapping of [¹⁸F]F^– on an ion exchange cartridge, or (3) addition of tetrabutylammonium hydroxide (TBAOH) and [¹⁸F]F^– to the reactor without trapping [¹⁸F]F^– on an ion exchange cartridge. We optimized [¹⁸F]fluorination conditions with t-butanol and then applied them to automatic synthesis using com. available radiochem. modules (TracerLab MX, GE Healthcare). We achieved a high radiochem. yield of 85.3 ¡À 3.5% by radio-TLC with TBAHCO₃ as an elution solvent and 20 mg of precursor at 100¡ãC (n = 4). With the same labeling conditions, use of Cs₂CO₃ and K₂₂₂ with t-BuOH and TBAOH with t-BuOH generated radiochem. yields of 57.1 ¡À 22.5% and 55.0 ¡À 18.8% by radio-TLC, resp. (n = 3 for each condition). Automated synthesis with TBAHCO₃ and 20 mg of precursor at 120¡ãC for 10 min of [¹⁸F]fluorination led to radiochem. yields of 60.2 ¡À 5.2% after HPLC purification with an MX module (n = 10). Synthesized [¹⁸F]FLT was stable for 6 h. [¹⁸F]FLT was synthesized with a significantly improved radiochem. yield by nucleophilic substitution catalyzed by protic solvent with mild reaction conditions and a short preparation time.

European Journal of Nuclear Medicine and Molecular Imaging published new progress about 17351-62-1. 17351-62-1 belongs to catalysis-chemistry, auxiliary class Salt,Amine, name is Tetrabutylammonium hydrogencarbonate, and the molecular formula is C17H37NO3, Formula: C17H37NO3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Ishihara, Nami published the artcileInvolvement of polycyclic aromatic hydrocarbons and endotoxin in macrophage expression of interleukin-33 induced by exposure to particulate matter, SDS of cas: 191-07-1, the publication is Journal of Toxicological Sciences (2022), 47(5), 201-210, database is CAplus.

Air pollutants are important factors that contribute to the development and/or exacerbation of allergic inflammation accompanied by asthma, but exptl. evidence still needs to be collected. Interleukin 33 (IL-33) is closely involved in the onset and progression of asthma. In this study, we examined the effects of particulate matter (PM) on IL-33 expression in macrophages. PM2.5 collected in Yokohama, Japan by the cyclone device significantly induced IL-33 expression in human THP-1 macrophages, and the induction was clearly suppressed by pretreatment with the aryl hydrocarbon receptor (AhR) antagonist CH-223191 or the Toll-like receptor 4 (TLR4) antagonist TAK-242. PM2.5-induced IL-33 expression was significantly attenuated in AhR-knockout or TLR4-mutated macrophages, suggesting an important role of polycyclic aromatic hydrocarbons (PAHs) and endotoxin in IL-33 stimulation. PM samples derived from tunnel dust slightly but significantly induced IL-33 expression, while road dust PM did not affect IL-33 expression. The PAH concentration in tunnel dust was higher than that in road dust. Tunnel dust or road dust PM contained less endotoxin than PM2.5 collected in Yokohama. These data suggest that the potency of IL-33 induction could depend on the concentration of PAHs as well as endotoxin in PMs. Caution regarding PAHs and endotoxin levels in air pollutants should be taken to prevent IL-33-induced allergic inflammation.

Journal of Toxicological Sciences published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, SDS of cas: 191-07-1.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Zhou, Hailin published the artcileSerum untargeted lipidomics by UHPLC-ESI-HRMS aids the biomarker discovery of colorectal adenoma, Quality Control of 6217-54-5, the publication is BMC Cancer (2022), 22(1), 314, database is CAplus and MEDLINE.

Colorectal adenoma (CA) is an important precancerous lesion and early screening target of colorectal cancer (CRC). Lipids with numerous physiol. functions are proved to be involved in the development of CRC. However, there is no lipidomic study with large-scale serum samples on diagnostic biomarkers for CA. The serum lipidomics of CA patients (n = 50) and normal control (NR) (n = 50) was performed by ultra high performance liquid chromatog.-high resolution mass spectrometry with electrospray ionization (UHPLC-ESI-HRMS). Univariate and multivariate statistical analyses were utilized to screen the differential lipids between groups, and combining the constituent ratio anal. and diagnostic efficiency evaluation by receiver operating characteristic (ROC) curve disclosed the potential mechanism and biomarkers for CA. There were obvious differences in serum lipid profiles between CA and NR groups. Totally, 79 differential lipids were selected by criterion of P < 0.05 and fold change > 1.5 or < 0.67. Triacylglycerols (TAGs) and phosphatidylcholines (PCs) were the major differential lipids with ratio > 60%, indicating these two lipid metabolic pathways showed evident disequilibrium, which could contribute to CA formation. Of them, 12 differential lipids had good diagnostic ability as candidate biomarkers for CA (AUC ¡Ý 0.900) by ROC anal. To our knowledge, this is the first attempt to profile serum lipidomics and explore lipid biomarkers of CA to help early screening of CRC. 12 differential lipids are obtained to act as potential diagnostic markers of CA. PCs and fatty acids were the main dysregulated biomarkers for CA in serum.

BMC Cancer published new progress about 6217-54-5. 6217-54-5 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Aliphatic hydrocarbon chain,Metabolic Enzyme,RAR/RXR,Natural product, name is Docosahexaenoic Acid, and the molecular formula is C10H9NO4S, Quality Control of 6217-54-5.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Adeyemi, Kazeem D. published the artcileDietary supplementation of Allium cepa skin alters intramuscular fat, muscle cholesterol, and fatty acids in rabbits, HPLC of Formula: 6217-54-5, the publication is Journal of the Science of Food and Agriculture (2022), 102(9), 3683-3692, database is CAplus and MEDLINE.

The high polyunsaturated fatty acids content of rabbit meat predisposes it to oxidative deterioration, which often results in reduced product quality and shelf life. This fact highlights the need to improve the antioxidant status of rabbit meat. This study investigated the effects of dietary supplementation of Allium cepa skin (ACS) on growth, carcass, i.m. fat, muscle fatty acids, cholesterol content, meat quality, antioxidant status, and sensory attributes of hind leg muscle of rabbits. Sixty-three, 28-day-old, male New Zealand rabbits (654 ¡À 25 g) were randomly allocated into 21 pens of three rabbits. The pens were randomly assigned to one of three dietary treatments – ACS-0: basal diet (BD) only; ACS-25: BD + 25 g kg^-1 ACS; and ACS-50: BD + 50 g kg^-1 ACS – for 56 days and then euthanized. Dietary ACS did not affect growth performance and retail cuts of rabbits. Muscle cholesterol was lower (P < 0.05) in ACS-supplemented rabbits than in controls. Dietary ACS lowered (P < 0.05) dissectible fat, i.m. fat content, C14:0, C16:0, C18:0, C18:2n-6, and C20:4n-6 levels and enhanced (P < 0.05) C18:3n-3, C20:5n-3, C22:6n-3, and C22:5n-3 concentration Dietary ACS increased muscle catalase activity in rabbits. Sensory qualities, malondialdehyde and carbonyl contents, and physicochem. attributes of hind leg muscle of rabbits after chill storage were not influenced by dietary ACS supplementation. Supplementation with 50 g kg-1 ACS reduced i.m. fat and cholesterol content and improved muscle n-3 fatty acids without impairing the physicochem. and sensory properties of rabbit meat. 2021 Society of Chem. Industry.

Journal of the Science of Food and Agriculture published new progress about 6217-54-5. 6217-54-5 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Aliphatic hydrocarbon chain,Metabolic Enzyme,RAR/RXR,Natural product, name is Docosahexaenoic Acid, and the molecular formula is C22H32O2, HPLC of Formula: 6217-54-5.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Fedorova, Olga published the artcileAutomated SPE-based synthesis of 16¦Á-[¹⁸F]fluoroestradiol without HPLC purification step, Recommanded Product: Tetrabutylammonium hydrogencarbonate, the publication is Applied Radiation and Isotopes (2018), 57-63, database is CAplus and MEDLINE.

A [¹⁸F]fluoroestradiol ([¹⁸F]FES) is well-established PET radiotracer for diagnosing and monitoring treatment of estrogen-pos. breast cancer. The radiotracer is produced via one-pot two steps synthesis using cyclic sulfate precursor and is usually purified by semi-preparative HPLC. Here we suggested simple SPE purification procedure using OASIS WAX 3cc and Sep-Pak QMA light cartridges that afforded [¹⁸F]FES in typically 15% RCY (corrected for decay) within 45 min formulated in 5% EtOH/saline. All purity parameters were well within specifications recommended in the Investigator¡äs Brochure for [¹⁸F]Fluoroestradiol.

Applied Radiation and Isotopes published new progress about 17351-62-1. 17351-62-1 belongs to catalysis-chemistry, auxiliary class Salt,Amine, name is Tetrabutylammonium hydrogencarbonate, and the molecular formula is C17H37NO3, Recommanded Product: Tetrabutylammonium hydrogencarbonate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Mahl, Magnus published the artcileMultilayer stacks of polycyclic aromatic hydrocarbons, Safety of Coronene, the publication is Nature Chemistry (2022), 14(4), 457-462, database is CAplus and MEDLINE.

Polycyclic aromatic hydrocarbons (PAHs) show promise for applications in functional devices such as organic photovoltaics and field-effect transistors, but, although nanometer-sized PAHs-often referred to as nanographenes-have been well investigated as single-layer mols., their multilayer counterparts remain rather unexplored. Here we show the assembly of a C₆₄ nanographene derivative (comprising a planar core decorated with four meta-terphenyl-imide moieties at its periphery) into multilayer stacks with smaller PAHs ranging from naphthalene to ovalene and hexabenzocoronene. The functionalized C₆₄ nanographene serves as a ditopic host that can accommodate a smaller PAH on either side of its planar core, in cavities delimited by its bulky imide substituents. Bilayers and trilayers (i.e., complexes with 1:1 and 1:2 host:guest ratios, resp.) were observed in solution, and dimers of these complexes as well as multilayer compounds were isolated in the solid state. Quantum-chem. calculations indicate that dispersion forces are the main stabilizing factor for these complexes.

Nature Chemistry published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, Safety of Coronene.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Vakarelska, Ekaterina published the artcilePersistent organic pollutants (POPs) – QSPR classification models by means of Machine learning strategies, Name: Coronene, the publication is Chemosphere (2022), 287(Part_2), 132189, database is CAplus and MEDLINE.

Persistent Organic pollutants (POPs) are toxic chems. with a shallow degradation rate and global neg. impact. Their physicochem. is combined with the complex effects of long-term POPs accumulation in the environment and transport function through the food chain. That is why POPs have been linked to adverse effects on human health and animals. They circulate globally via different environmental pathways, and could be detected in regions far from their source of origin. The primary goal of the present study is to carry out classification of various representatives of POPs using different theor. descriptors (mol., structural) to develop quant. structure-properties relationship (QSPR) models for predicting important properties POPs. Multivariate statistical methods such as hierarchical cluster anal., principal components anal. and self-organizing maps were applied to reach excellent partitioning of 149 representatives of POPs into 4 classes using ten most appropriate descriptors (out of 63) defined by variable reduction procedure. The predictive capabilities of the defined classes could be applied as a pattern recognition for new and unidentified POPs, based only on structural properties that similar mols. may have. The addnl. self-organizing maps technique made it possible to visualize the feature-space and investigate possible patterns and similarities between POPs mols. It contributes to confirmation of the proper classification into four classes. Based on SOM results, the effect of each variable and pattern formation has been presented.

Chemosphere published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C2H4ClNO, Name: Coronene.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Zakerhamidi, M. S. published the artcileSolvent specific and nonspecific interactions’ effects on nonlinear optical responses of Cresyl Violet dye, Product Details of C18H15N3O3, the publication is Journal of Molecular Liquids (2018), 529-535, database is CAplus.

In this study, solvents polarity effects on nonlinear properties of Crysel violet acetate (CVA) dye were investigated by Z-scan method. Nonlinear parameters (absorption coefficient and refractive index) for CVA dye in solvent media were obtained using exptl. setup. The obtained exptl. results demonstrate that the mechanism of nonlinear absorption depend highly on the properties of surrounding mol. media and the character of intermol. interactions. Contributions of intermol. interactions were determined by exploiting these results with Kamlet-Taft (KAT) polarity parameters. The refractive index in different solvents shows neg. sign (coefficient’s order is 10^-7). Also, nonlinear absorptions in different solvents show pos. sign and the obtained coefficient’s order is 10^-4.

Journal of Molecular Liquids published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C48H47FeP, Product Details of C18H15N3O3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia