Tag: M.W=250-300

Liu, Kun; Jiang, Liping; Shi, Yulin; Liu, Baiyang; He, Yaomei; Shen, Qiushuo; Jiang, Xiulin; Nie, Zhi; Pu, Jun; Yang, Cuiping; Chen, Yongbin published the artcile< Hypoxia-induced GLT8D1 promotes glioma stem cell maintenance by inhibiting CD133 degradation through N-linked glycosylation>, Category: esters-buliding-blocks, the main research area is GLT8D1 CD133 degradation signaling stem cell hypoxia glioma progression.

Gliomas are the most aggressive primary brain tumors. However, no significant improvement in survival has been achieved with the addition of temozolomide (TMZ) or radiation as initial therapy, although many clin. efforts have been carried out to target various signaling pathways or putative driver mutations. Here, we report that glycosyltransferase 8 domain containing 1 (GLT8D1), induced by HIF-1α under a hypoxic niche, significantly correlates with a higher grade of glioma, and a worse clin. outcome. Depletion of GLT8D1 inhibits self-renewal of glioma stem cell (GSC) in vitro and represses tumor growth in glioma mouse models. GLT8D1 knockdown promotes cell cycle arrest at G2/M phase and cellular apoptosis with or without TMZ treatment. We reveal that GLT8D1 impedes CD133 degradation through the endosomal-lysosomal pathway by N-linked glycosylation and protein-protein interaction. Directly blocking the GLT8D1/CD133 complex formation by CD133N1∼108 (referred to as FECD133), or inhibiting GLT8D1 expression by lercanidipine, suppresses Wnt/β-catenin signaling dependent tumorigenesis both in vitro and in patient-derived xenografts mouse model. Collectively, these findings offer mechanistic insights into how hypoxia promotes GLT8D1/CD133/Wnt/β-catenin signaling during glioma progression, and identify GLT8D1 as a potential therapeutic target in the future.

Cell Death & Differentiation published new progress about Apoptosis. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Rehman, Najeeb Ur; Ansari, Mohd Nazam; Ahmad, Wasim; Amir, Mohd published the artcile< GC-MS Analysis and In Vivo and Ex Vivo Antidiarrheal and Antispasmodic Effects of the Methanolic Extract of Acacia nilotica>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is Acacia nilotica antidiarrheal diarrhea hyperactive gut motility disorder; A. nilotica; Ca++ channel blocker; GC-MC; antispasmodic; phosphodiesterase inhibitor.

This present study evaluated and rationalized the medicinal use of the fruit part of Acacia nilotica methanolic extract The phytochems. were detected using gas chromatog.-mass spectrometry (GC-MS) while the in vivo antidiarrheal test was done using Swiss albino mice. To determine the details of the mechanism(s) involved in the antispasmodic effect, isolated rat ileum was chosen using different ex vivo assays by maintaining a physiol. environment. GC-MS results showed that A. nilotica contained pyrogallol as the major polyphenol present (64.04%) in addition to polysaccharides, polyphenol, amino acid, steroids, fatty acid esters, and triterpenoids. In the antidiarrheal experiment, A. nilotica inhibited diarrheal episodes in mice significantly (p < 0.05) by 40% protection of mice at 200 mg/kg, while 80% protection was observed at 400 mg/kg by the orally administered extract The highest antidiarrheal effect was observed with loperamide (p < 0.01), used as a control drug. In the ex vivo experiments, A. nilotica inhibited completely in increasing concentrations (0.3 to 10 mg/mL) the carbachol (CCh; 1μM) and high K+ (80 mM)-evoked spasms in ileum tissues at equal potencies (p > 0.05), similar to papaverine, a dual inhibitor of the phosphodiesterase enzyme (PDE) and Ca++ channels. The dual inhibitory-like effects of A. nilotica on PDE and Ca++ were further validated when A. nilotica extract (1 and 3 mg/mL)-pre-incubated ileum tissues potentiated and shifted isoprenaline relaxation curves towards lower doses (leftward), similar to papaverine, thus confirming the PDE inhibitory-like mechanism whereas its CCB-like effect of the extract was confirmed at 3 and 5 mg/mL by non-specific inhibition of CaCl2-mediated concentration response curves towards the right with suppression of the maximum peaks, similar to verapamil, used as standard CCB. Thus, this study characterized the chem. composition and provides mechanistic support for medicinal use of A. nilotica in diarrheal and hyperactive gut motility disorders.

Molecules published new progress about Acacia nilotica. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

McClendon, Eric; Omollo, Ann O.; Valente, Edward J.; Hamme, Ashton T. II published the artcile< Oxonium ion-mediated synthesis of 4-substituted spiro-isoxazolines>, Reference of 112-63-0, the main research area is spiro isoxazoline stereoselective preparation hydroxyalkylisoxazole cyclization oxonium intermediate.

The stereoselective synthesis of 4-bromo-spiro-isoxazolines was achieved in one step through the bromination of various isoxazoles that contain a pendant alc. or carboxylic acid functional group. Isoxazole bromination leads to a bromonium ion intermediate, which opens either by neighboring oxygen lone pair electrons or by intramol. nucleophilic attack. Single X-ray crystal data provide evidence that the two contiguous stereocenters of the spiro-isoxazoline are formed by the anti intramol. attack of the nucleophile relative to bromine, since there is an anti stereochem. relationship between the spirocyclic ring oxygen and the bromine atom.

Tetrahedron Letters published new progress about Cyclization. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Reference of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Vysotskii, Yu. B. published the artcile< Quantum-chemical interpretation of the substituent effect on the pKa of molecules with conjugated bonds using the PPP method>, Formula: C19H34O2, the main research area is substituent effect basicity conjugated heterocycle; quantum chem conjugated heterocycle PPP.

Change in pKa of unsaturated heterocycles induced by functionalization is proportional to the difference in residual π-electron changes in the unsubstituted heterocycle and its conjugate acid at the site of functionalization.

Teoreticheskaya i Eksperimental’naya Khimiya published new progress about Basicity. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Formula: C19H34O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Lee, Yu-Lin; Lin, Kuan-Yin; Cheng, Shu-Hsing; Lu, Po-Liang; Wang, Ning-Chi; Ho, Mao-Wang; Yang, Chia-Jui; Liou, Bo-Huang; Tang, Hung-Jen; Huang, Shie-Shian; Huang, Sung-Hsi; Chen, Tun-Chieh; Lin, Chi-Ying; Lin, Shih-Ping; Lee, Yuan-Ti; Hung, Chien-Ching published the artcile< Dual therapy with dolutegravir plus boosted protease inhibitor as maintenance or salvage therapy in highly experienced people living with HIV>, Category: esters-buliding-blocks, the main research area is dolutegravir protease inhibitor antiHIV agent HIV; Antiretroviral resistance; Dyslipidaemia; Integrase strand transfer inhibitor; Two-drug regimen; Weight gain.

Real-world experience with dolutegravir (DTG) plus boosted protease inhibitor (bPI) as a two-drug regimen is limited for highly experienced HIV-pos. patients with virol. failure or intolerance to antiretroviral therapy. Patients receiving DTG plus bPI between Sept. 2016 and June 2019 at 15 designated hospitals for HIV care in Taiwan were retrospectively included in this study. A standardised case record form was used to collect clin. data. The primary endpoint was virol. response, defined as achieving or maintaining plasma HIV-RNA <50 copies/mL at Week 48. A total of 77 patients were included; 58 (75.3%) had documented genotypic resistance to 1-4 antiretroviral classes. The most commonly used PI was darunavir (87.0%; 67/77). Seven patients (9.1%) had no virol. data at Week 48, including three with loss to follow-up, one severe hyperlipidemia, one renal failure and cardiovascular disease, one superimposed HBV infection and one death from anal cancer. The virol. response rate increased from 59.7% at baseline to 90.9% at Week 24 and 85.7% at Week 48. The only patient (1.3%) with virol. failure at Week 48 had poor adherence and baseline low-level resistance to darunavir with resistance-associated mutations at M46L, I50V and V82A. Compared with baseline, mean total cholesterol increased by 20.1 mg/dL and weight by 2.8 kg at Week 48, while the estimated glomerular filtration rate decreased by 14.4 mL/min/1.73m2 (both P < 0.05). We conclude that a two-drug regimen containing DTG plus bPI was effective in highly-experienced HIV-pos. patients, but metabolic impact and weight gain should be closely monitored. International Journal of Antimicrobial Agents published new progress about Anti-HIV agents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Pandey, A. K.; Chowdhury, A. R. published the artcile< Essential oil of Ocimum basilicum L. from Satpura plateau of central India>, Electric Literature of 112-63-0, the main research area is Ocimum oil camphor gas chromatog.

The composition of the volatile oil of O. basilicum L. growing in India determined by GC-MS indicated the presence of 55 compounds, of which 43 were identified constituting 96.78% of the oil. The main compounds were camphor (19.97%), eugenol (14.1%), camphene (8.92%), γ-gurjunene (4.94%), trans-caryophyllene (3.64%), calarene (3.59%), linalool (2.95%), (Z,E)-α-farnesene (2.82%), patchoulene (2.79%), spathulenol (2.7%), myrtenol (2.48%), and viridiflorol (2.06%). O. basilicum containing camphor as a major constituent was reported 1st time from central India.

Indian Perfumer published new progress about Gas chromatography-mass spectrometry. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Electric Literature of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Akiel, Maaged A.; Alshehri, Ohoud Y.; Aljihani, Shokran A.; Almuaysib, Amani; Bader, Ammar; Al-Asmari, Ahmed I.; Alamri, Hassan S.; Alrfaei, Bahauddeen M.; Halwani, Majed A. published the artcile< Viridiflorol induces anti-neoplastic effects on breast, lung, and brain cancer cells through apoptosis>, Application of C19H34O2, the main research area is brain cancer cells anti neoplastic effect breast lung apoptosis; Anticancer; Apoptosis; Natural product; Viridiflorol, Cytotoxicity, Drug discovery.

All active natural mols. are not fully exploited as therapeutic agents, causing delays in the advancement of anticancer drug discovery. Viridiflorol is a natural volatile element that may work as anti-cancer compound We tested the anticancer properties of viridiflorol at different concentrations ranging from 0.03 to 300μM in vitro on three cancer cells including breast (MCF-7), lung (A549) and brain (Daoy). The cancer cells responses were documented after treatment using MTT and Annexin V assays. Viridiflorol showed cytotoxic effects against all tested cell lines, reducing cell viability in a concentration-dependent manner with variable IC50 values. Daoy and A549 cell lines were more sensitive to viridiflorol when compared with temozolomide and doxorubicin, resp. Viridiflorol demonstrated the highest anticancer activity against the Daoy cells with an estimated IC50 of 0.1μM followed by MCF-7 at 10μM, and A549 at 30μM. In addition, upon exposure to concentrations ranging from 30μM to 300μM of viridiflorol, early and late apoptotic cell death was induced in a concentration dependent manner in Daoy (55.8-72.1), MCF-7 (36.2-72.7) and A459 (35-98.9) cell lines, resp. In conclusion, viridiflorol demonstrates cytotoxic and apoptotic ability in three different cancer cell lines (brain, breast and lung).

Saudi Journal of Biological Sciences published new progress about Antitumor agents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application of C19H34O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Taylor, D. Martin; Morgan, Hywel; D’Silva, Claudius published the artcile< Behavior of avidin and avidin/bisbiotin polymers at the air-water interface>, COA of Formula: C19H34O2, the main research area is avidin biotin derivative polymer interface; bisbiotin avidin polymer interface.

The surface behavior of avidin and two polymers, formed by affinity polymerization from two-different stoichiometric mixtures of avidin and the bifunctional ligand bisbiotin, has been investigated at the air/water interface. Strong hysteresis in the pressure-area isotherms is attributed to mech. distortion of the mols. When subjected to step change in pressure, the monolayer area relaxes to a new equilibrium value following first-order dynamics, the time constant being of the order of minutes for a pressure change of 5 mN m-1. Equilibrium isotherms for the fully relaxed monolayers are linear over most of the pressure range, with both compression and expansion isotherms exactly coincident. Monolayers of the avidin/bisbiotin polymer were deposited onto electron microscope grids by the Langmuir-Blodgett technique and imaged in a transmission electron microscope. The area per repeat unit was estimated to be ∼30 nm2 in good agreement with previous estimates, but much smaller than the area per mol. obtained by extrapolating the pressure-area isotherm to zero pressure. Finally it is shown that spreading solvents containing a high percentage of chloroform cause avidin to denature at the air/water interface, this manifesting itself as a large mol. area at low surface pressure. However, it appears that denaturation may be reversed almost completely when the monolayer is compressed. The investigation suggests that it may be feasible to fabricate mol. electronic networks based on affinity polymerization

Journal of Colloid and Interface Science published new progress about Avidins Role: BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, COA of Formula: C19H34O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Nagy, Audric; Collard, Laurent; Indukuri, Kiran; Leyssens, Tom; Riant, Olivier published the artcile< Enantio-, Regio- and Chemoselective Copper-Catalyzed 1,2-Hydroborylation of Acylsilanes>, Computed Properties of 112-63-0, the main research area is hydroboration reduction ketone acylsilane preparation hydroxyalkylsilane enantiomer copper catalyst; copper diphosphine complex catalyst asym hydroboration acylsilane preparation hydroxyalkylsilane; chiral alc preparation hydroxyalkylsilane asym reduction ketone acylsilane pinacolboronate; acylsilane; asymmetric synthesis; copper; hydroborylation; hydroxysilanes.

Enantioselective synthesis of synthetically significant (α-hydroxyallyl)silanes, (α-hydroxybenzyl)silanes, and (α-hydroxyalkyl)silanes is reported. The present copper-catalyzed 1,2-selective hydroborylation of acylsilanes affords the aforementioned products in high yields and with high enantiomeric excesses. This robust and scalable additive-free catalytic system relies on the use of low copper(II) acetate and diphosphine ligand loadings at room temperature in the presence of a com. available and bench-stable hydride source.

Chemistry – A European Journal published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation) (silylated). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Computed Properties of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Boyington, Allyson J.; Riu, Martin-Louis Y.; Jui, Nathan T. published the artcile< Anti-Markovnikov Hydroarylation of Unactivated Olefins via Pyridyl Radical Intermediates>, Product Details of C19H34O2, the main research area is alkylpyridine preparation; halopyridine olefin regioselective hydroarylation iridium catalyst.

The intermol. alkylation of pyridine units with simple alkenes has been achieved via a photoredox radical mechanism. This process occurs with complete regiocontrol, where single-electron reduction of halogenated pyridines regiospecifically yields the corresponding radicals in a programmed fashion, and radical addition to alkene substrates occurs with exclusive anti-Markovnikov selectivity. This system is mild, tolerant of many functional groups, and effective for the preparation of a wide range of complex alkylpyridines.

Journal of the American Chemical Society published new progress about Alkenes Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Product Details of C19H34O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics