Tag: M.W=300-350

Ayurini, Meri published the artcilePolymer end group control through a decarboxylative cobalt-mediated radical polymerization: new avenues for synthesizing peptide, protein and nanomaterial conjugates, Quality Control of 71989-31-6, the publication is JACS Au (2022), 2(1), 169-177, database is CAplus and MEDLINE.

Cobalt-mediated radical polymerizations (CMRPs) have been initiated by the radical decarboxylation of tetrachlorophthalimide activated esters. This allows for the controlled radical polymerization of activated monomers across a broad temperature range with a single cobalt species, with incorporation of polymer end groups derived from simple carboxylic acids derivatives and termination with an organozinc reagent. This method has been applied to the synthesis of a polymer/graphene conjugate and a water-soluble protein/polymer conjugate, demonstrating the first examples of CMRP in graphene and protein conjugation.

JACS Au 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, Quality Control of 71989-31-6.

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

Erb, Sophia J. published the artcileresponsiveness of PNPLA3 and lipid-related transcription factors is dependent upon fatty acid profile in primary bovine hepatocytes, Computed Properties of 6217-54-5, the publication is Scientific Reports (2022), 12(1), 888, database is CAplus and MEDLINE.

Knockdown of patatin-like phospholipase domain-containing protein 3 (PNPLA3) increased triglycerides (TG) in primary bovine hepatocytes, suggesting that PNPLA3 plays a causal role in hepatic TG clearing. In vivo, PNPLA3 abundance across the periparturient period is inversely related to hepatic TG accumulation and circulating fatty acid (FA) concentrations The purpose of this research was to determine if PNPLA3, as well as other lipases, transcription factors, or FA-mediated genes, are regulated by FA mimicking liver lipid accumulation (ACCUM) and liver lipid clearing (RECOV) or singular FA physiol. found in dairy cows at 0.5 mM of circulating RECOV (iRECOV). Abundance of PNPLA3 tended to decrease with ACCUM and increased quadratically with RECOV (P ¡Ü 0.10), differing from PNPLA3 expression, but consistent with previous in vivo research. Adipose TG lipase abundance, but not other lipase abundances, was quadratically responsive to both ACCUM and RECOV (P ¡Ü 0.005). Abundance of PNPLA3 and SREBP1c and expression of LXRA responded similarly to iRECOV, with C18:0 tending to decrease abundance (P ¡Ü 0.07). Result indicate that bovine PNPLA3 is translationally regulated by FA and although a LXRA-SREBP1c pathway mediation is possible, the mechanism warrants further investigation.

Scientific Reports 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, Computed Properties of 6217-54-5.

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

Menon, Swetha S. published the artcileCopper- Based Metal-Organic Frameworks as Peroxidase Mimics Leading to Sensitive H₂O₂ and Glucose Detection, Application of 2,2′-Dithiodibenzoic acid, the publication is ChemistrySelect (2018), 3(28), 8319-8324, database is CAplus.

A copper based metal organic framework (MOF) synthesized under solvo-thermal conditions was found to exhibit intrinsic peroxidase-like activity and was established both spectrophotometrically and electrochem. It was found that the catalytic behavior had been consistent with Michaelis-Menten kinetics with a Km value of 0.08 mM with H₂O₂, relatively lower than that of Horseradish peroxidase enzyme (HRP) ie; 3.7 mM. The suitability of Cu-MOF for sensing H₂O₂ was investigated by electrochem. means. In the case of electrochem. studies, the Cu-MOF modified GCE (glassy carbon electrode) showed a very high sensitivity of 263¦ÌA mmol^-1 cm^-2 with a detection limit up to 35 mM for H₂O₂. The peroxidase mimics can be combined with the enzymic oxidation of glucose for sensing glucose. The detection of H₂O₂ and glucose using Cu-MOF was found to be highly selective towards the common interfering species.

ChemistrySelect published new progress about 119-80-2. 119-80-2 belongs to catalysis-chemistry, auxiliary class sulfides,Carboxylic acid,Benzene, name is 2,2′-Dithiodibenzoic acid, and the molecular formula is C14H10O4S2, Application of 2,2′-Dithiodibenzoic acid.

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

Hohn, Michael published the artcileSynthesis and Preliminary In Vitro and In Vivo Evaluation of Thiirane-Based Slow-Binding MMP Inhibitors as Potential Radiotracers for PET Imaging, Category: catalysis-chemistry, the publication is ChemistrySelect (2018), 3(42), 11729-11736, database is CAplus.

Many serious diseases such as cancer, atherosclerosis and arthritis are characterized by upregulation of activated matrix metalloproteinases (MMPs). For this reason imaging and quantification of activated MMPs with the mol. imaging techniques such as single photon emission computed tomog. (SPECT) and positron emission tomog. (PET) using radiolabeled MMP inhibitors would be a valuable tool for the diagnosis and therapy planning of mentioned diseases. This work aims at the synthesis and preliminary in vitro and in vivo evaluation of positron-emitter 18F-fluorine labeled radiotracers based on 2-{[(4-phenoxyphenyl)sulfonyl]methyl}thiirane (SB-3CT), a slow-binding and mechanism-based MMP-2 and -9 inhibitor. Therefore, a library of fluorinated SB-3CT derivatives were prepared and evaluated in vitro in MMP inhibition assays. From this pool the 18F-labeled triazole [18F]18d was successfully synthesized in a two-step procedure. However, this compound was unstable in human and mouse serum and showed a biodistribution behavior in C57BL/6 mice that is not favorable for PET imaging preventing further in vivo evaluations in MMP-associated mouse models of disease.

ChemistrySelect 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, Category: catalysis-chemistry.

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

Yang, Su published the artcileModular Design of Supramolecular Ionic Peptides with Cell-Selective Membrane Activity, Related Products of catalysis-chemistry, the publication is ChemBioChem (2021), 22(22), 3164-3168, database is CAplus and MEDLINE.

The rational design of materials with cell-selective membrane activity is an effective strategy for the development of targeted mol. imaging and therapy. Here we report a new class of cationic multidomain peptides (MDPs) that can undergo enzyme-mediated mol. transformation followed by supramol. assembly to form nanofibers in which cationic clusters are presented on a rigid ¦Â-sheet backbone. This structural transformation, which is induced by cells overexpressing the specific enzymes, led to a shift in the membrane perturbation potential of the MDPs, and consequently enhanced cell uptake and drug delivery efficacy. We envision the directed self-assembly based on modularly designed MDPs as a highly promising approach to generate dynamic supramol. nanomaterials with emerging membrane activity for a range of disease targeted mol. imaging and therapy applications.

ChemBioChem 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 C15H14O, Related Products of catalysis-chemistry.

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

Wang, Jia published the artcilePerforming multi-step chemical reactions in microliter-sized droplets by leveraging a simple passive transport mechanism, Recommanded Product: Tetrabutylammonium hydrogencarbonate, the publication is Lab on a Chip (2017), 17(24), 4342-4355, database is CAplus and MEDLINE.

Despite the increasing importance of positron emission tomog. (PET) imaging in research and clin. management of disease, access to myriad new radioactive tracers is severely limited due to their short half-lives (which requires daily production) and the high cost and complexity of tracer production The application of droplet microfluidics based on electrowetting-on-dielec. (EWOD) to the field of radiochem. can significantly reduce the amount of radiation shielding necessary for safety and the amount of precursor and other reagents needed for the synthesis. Furthermore, significant improvements in the molar activity of the tracers have been observed However, widespread use of this technol. is currently hindered in part by the high cost of prototype chips and the operating complexity. To address these issues, we developed a novel microfluidic device based on patterned wettability for multi-step radiochem. reactions in microliter droplets and implemented automated systems for reagent loading and collection of the crude product after synthesis. In this paper, we describe a simple and inexpensive method for fabricating the chips, demonstrate the feasibility of prototype chips for performing multi-step radiochem. reactions to produce the PET tracers [¹⁸F]fallypride and [¹⁸F]FDG, and further show that synthesized [¹⁸F]fallypride can be used for in vivo mouse imaging.

Lab on a Chip 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 C8H14O4, Recommanded Product: Tetrabutylammonium hydrogencarbonate.

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

Lozano-Munoz, Ivonne published the artcileHerbivorous fish (Medialuna ancietae) as a sustainable alternative for nutrition security in Northern Chile, Synthetic Route of 6217-54-5, the publication is Scientific Reports (2022), 12(1), 1619, database is CAplus and MEDLINE.

Sustainability in aquaculture is a necessity of the future, not only as the most promising means of supplying the protein that the world will require to feed its growing population but to offer needed conservation of the world¡äs ocean resources. The use of wild fish inputs in farm-raised fish outputs has been a primary concern of sustainability in aquaculture production Herbivorous fish are more efficient converters of protein into fish flesh. Species of the genus Medialuna fish have been reported as a fast-growing, short-lived species. The native fish Acha (Medialuna ancietae Chirichigno 1987) in the Northern part of Chile is an over-exploited fish that has been associated with aquatic vegetation as a food source. We studied the feeding habits and nutritional composition of M. ancietae. For this, we developed a reference collection of marine macroalga (epidermis and nutritional composition) observed in the diet of individuals of this species for the study of digestive material. More than 90% of the components found were marine macroalgae, indicating that M. ancietae is an herbivorous fish. Compared to non-herbivorous fish our results showed that most of the nutrients present in the Medialuna diet are found at much lower levels including n-3 long-chain polyunsaturated fatty acids (49.7%) and protein (13-60%). M. ancietae meat provides essential components of human nutrition with a significant protein content (18.99 ¡À 0.26%) and 268 ¡À 5.9 mg/100 g of the essential n-3 long-chain polyunsaturated fatty acids. Most fed aquaculture non-herbivorous species rely on wild-captured fish for these essential nutrients, while M. ancietae can obtain and concentrate them from potentially cultivable macroalgae. M. ancietae has potential for sustainable aquaculture production as a contribution to nutrition security and the re-stocking of wild populations.

Scientific Reports 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, Synthetic Route of 6217-54-5.

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

Sefi, Mediha published the artcileAntioxidant role of selenium against maneb-induced cardiotoxicity in mice, Quality Control of 6217-54-5, the publication is Environmental Science and Pollution Research (2022), 29(36), 54827-54841, database is CAplus and MEDLINE.

The current study was conducted to assess the beneficial effect of selenium (Se) on maneb-induced cardiotoxicity and fatty acid alterations in adult mice. Swiss albino male mice were assigned into four exptl. groups. The first group consisted of neg. controls. The second group represented the pos. controls where mice received daily, via the diet, sodium selenite at a dose of 0.2 mg/kg. For the third group, mice were subjected to i.p. injections of maneb (30 mg/kg BW). The fourth group (MB+Se) received daily the same dose of maneb as group 3 along with sodium selenite at the same dose as group 2. Mice exposure to maneb caused cardiotoxicity as indicated by an increase in malondialdehyde, hydrogen peroxide, and protein carbonyl levels, and an alteration of the antioxidant defense system (catalase, glutathione peroxidase, superoxide dismutase, glutathione, and vitamin C). Plasma lactate dehydrogenase activity and total cholesterol, triglyceride, and low-d. lipoprotein cholesterol levels increased, while high-d. lipoprotein cholesterol level decreased. Results showed also a decrease in the amount of n-3 PUFA, docosahexaenoic, docosapentaenoic, and eicosapentaenoic acids. However, an increase in the levels of MUFA, cis-vaccenic, and palmitoleic acids was observed Co-administration of Se restored the parameters indicated above to near control values. The histopathol. findings confirmed the biochem. results. Selenium could be a useful and efficient agent against maneb-induced cardiotoxicity.

Environmental Science and Pollution Research 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 C9H8BNO2, Quality Control of 6217-54-5.

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

Brown, Robert W. published the artcileNutrient (C, N and P) enrichment induces significant changes in the soil metabolite profile and microbial carbon partitioning, Name: Docosahexaenoic Acid, the publication is Soil Biology & Biochemistry (2022), 108779, database is CAplus.

The cycling of soil organic matter (SOM) and carbon (C) within the soil is governed by the presence of key macronutrients, particularly nitrogen (N) and phosphorus (P). The relative ratio of these nutrients has a direct effect on the potential rates of microbial growth and nutrient processing in soil and thus is fundamental to ecosystem functioning. However, the effect of changing soil nutrient stoichiometry on the small organic mol. (i.e., metabolite) composition and cycling by the microbial community remains poorly understood. Here, we aimed to disentangle the effect of stoichiometrically balanced nutrient addition on the soil metabolomic profile and apparent microbial carbon use efficiency (CUE) by adding a labile C source (glucose) in combination with N and/or P. After incorporation of the added glucose into the microbial biomass (48 h), metabolite profiling was undertaken by ultra-performance liquid chromatog.-tandem mass spectrometry (UPLC-MS/MS). 494 metabolites were identified across all treatments mainly consisting of lipids (n = 199), amino acids (n = 118) and carbohydrates (n = 43), >97% of which showed significant changes in concentration between at least one treatment. Overall, glucose-C addition generally increased the synthesis of other carbohydrates in soil, while addition of C and N together increased peptide synthesis, indicative of protein formation and turnover. The combination of C and P significantly increased the number of fatty acids synthesized. There was no significant change in the PLFA-derived microbial community structure or microbial biomass following C, N and P addition Further, N addition led to an increase in glucose-C partitioning into anabolic processes (i.e., increased CUE), suggesting the microbial community was N, but not P limited. Based on the metabolomic profiles observed here, we conclude that inorganic nutrient enrichment causes substantial shifts in both primary and secondary metabolism within the microbial community, leading to changes in resource flow and thus soil functioning, however, the microbial community illustrated significant metabolic flexibility.

Soil Biology & Biochemistry 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, Name: Docosahexaenoic Acid.

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

Calisir, Umit published the artcileSynthesis, characterizations of aryl-substituted dithiodibenzothioate derivatives, and investigating their anti-Alzheimer¡äs properties, Application of 2,2′-Dithiodibenzoic acid, the publication is Journal of Biomolecular Structure and Dynamics, database is CAplus and MEDLINE.

The main objective of the present study was to synthesize potential inhibitor/activators of AChE and hCA I-II enzymes, which was thought to be directly related to Alzheimer¡äs disease. Dithiodibenzothioate compounds were synthesized by thioesterification. HOMO-LUMO calculations and electronic properties of all synthesized compounds were comprehensively illuminated with a semi-empirical MO (SEMO) package for organic and inorganic systems using Austin Model 1 (AM1)-Hamiltonian as implemented in the VAMP module of Materials Studio. In addition, the inhibition effects of these compounds for AChE and hCA I-II in vitro conditions were investigated. It was revealed that compounds I [R = 2-Me, 3-Me, 4-Me, 2-MeO, 3-MeO, 4-MeO] inhibited the AChE under in vitro conditions. Compound I [R = 2-Me] activated the enzyme hCA I while compounds I [R = 3-Me, 4-Me, 2-MeO] inhibited it. Compounds I [R = 3-MeO, 4-MeO], on the other hand, did not exhibit a regular inhibition profile. Similarly, compound I [R = 2-Me] activated the hCA II enzyme whereas compounds I [R = 3-Me, 4-Me, 2-MeO, 3-MeO] inhibited it. CompoundI [R = 4-MeO] did not have a consistent inhibition profile for hCA II. Docking studies were performed with the compounds against AChE and hCA I-II receptors using induced-fit docking method. Mol. Dynamics (MD) simulations for best effective three protein-ligand couple were conducted to explore the binding affinity of the considered compounds in semi-real in-silico conditions. Along with the MD results, compound I [R = 2-Me]-based protein complexes were found more stable than compound I [R = 3-MeO].

Journal of Biomolecular Structure and Dynamics published new progress about 119-80-2. 119-80-2 belongs to catalysis-chemistry, auxiliary class sulfides,Carboxylic acid,Benzene, name is 2,2′-Dithiodibenzoic acid, and the molecular formula is C14H10O4S2, Application of 2,2′-Dithiodibenzoic acid.

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