Tag: M.W=250-300

Tu, Zewei; Ji, Qiankun; Han, Qing; Long, Xiaoyan; Li, Jingying; Wu, Lei; Huang, Kai; Zhu, Xingen published the artcile< Intrinsic immune evasion patterns predict temozolomide sensitivity and immunotherapy response in lower-grade gliomas.>, Application of C19H34O2, the main research area is Cancer immune evasion; Immunotherapy response; Lower-grade glioma (LGG); Prognosis; Temozolomide (TMZ) sensitivity.

BACKGROUND: Although intrinsic immune-evasion is important in cancer proliferation, metastasis and response to treatment, it is unclear whether intrinsic immune-evasion patterns of gliomas can aid in predicting clinical prognosis and determining treatment. METHODS: A total of 182 immune-evasion genes intrinsic to cancer were subjected to consensus clustering to identify immune-evasion patterns in 1421 patients with lower-grade glioma (LGG). The levels of each cancer hallmark were determined by the Gene Set Variant Analysis (GSVA) method, and immune cell infiltrations were quantified using two algorithms, the single-sample Gene Set Enrichment Analysis (ssGSEA) and the Cell-type Identification By Estimating Relative Subsets Of RNA Transcripts (CIBERSORT) methods. IEVscore was determined by a method that combined univariate Cox regression analysis, least absolute shrinkage and selection operator (LASSO) regression and principal component analysis (PCA). RESULTS: Transcriptional and genomic analysis showed that most immune evasion genes (IEVGs) were upregulated in LGGs, with aberrant expression driven by alterations in copy number variants (CNV). Based on the mRNA expression profiles of cancer-intrinsic IEVGs could be divided into three LGG subgroups with distinct prognosis, clinicopathological features and immune infiltrations. A combined scoring scheme designed to assess the immune-evasion levels of LGGs divided these 1421 patients into two subgroups that differed in IEVscores. LGG patients with low-IEVscore had a better prognosis, would be more likely to benefit from immune check-point inhibitors and would be more susceptible to temozolomide (TMZ) chemotherapy. CONCLUSION: Intrinsic immune evasion in the tumor microenvironment (TME) has a crucial effect on glioma formation. Quantitatively assessing the IEV scores of individual LGG patients could enhance knowledge about the intra-glioma microenvironment and lead to the development of individualized therapeutic strategies for patients with LGG.

BMC cancer published new progress about 112-63-0. 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

Chen, Jiangyan; Wang, Weitao; Kong, Jiaqi; Yue, Yadong; Dong, Yiyang; Zhang, Jichuan; Liu, Li published the artcile< Application of UHPLC-Q-TOF MS based untargeted metabolomics reveals variation and correlation amongst different tissues of Eucommia ulmoides Oliver>, Product Details of C19H34O2, the main research area is metabolomic variation Eucommia liquid chromatog mass spectrometry.

The biol. function of Eucommia ulmoides Oliver (EU) is related to its metabolites. However, due to the complexity of distribution of metabolites in different tissues, currently, the comprehensive information anal. on metabolome of EU has been limited. In this study, we analyzed the components of leaves, seeds and barks of EU by using ultra high-performance liquid chromatog.-tandem time-of-flight mass spectrometer (UHPLC-Q-TOF MS) untargeted metabolomics before 2373 metabolites were identified in total. By using Principal Component Anal. (PCA), Partial Least Square Discriminant Anal. (PLS-DA) and other multivariate statistical anal. methods, there were 116 metabolites expressing differently in all samples. The result showed that the metabolic composition of leaves was similar to that of barks and there still existed significant differences amongst different tissues in HCA anal. Besides, the heatmap of differential metabolites also showed the higher concentrations of organic acids and derivatives, lipids and lipid-like mols. in seeds compared to leaves and barks. Furthermore, we detected 13,456 metabolites-metabolites correlations and determined 1098 metabolic pairs which resulted in significant correlation by Pearsons correlation anal. At last, all detected metabolites were annotated in KEGG and 966 of them had KEGG ID. After enrichment anal., 311 metabolites were mapped in 168 pathways and 26 of these pathways had apparent influence in the metabolic differences amongst different parts of EU. This work provides the first comprehensive metabolomic of EU, which will provide theor. basis for the separation and identification of medicinal activities of EU and potentially help advance studies in EU metabolic engineering.

Microchemical Journal published new progress about Eucommia ulmoides. 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

Guo, Xin; Basu, Kallol; Cabral, Jose A.; Paquette, Leo A. published the artcile< Relative Rate Profile for Ring-Closing Metathesis of a Series of 1-Substituted 1,7-Octadienes as Promoted by a 4,5-Dihydroimidazol-2-ylidene-Coordinated Ruthenium Catalyst>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is ruthenium imidazolylidene catalyzed ring closing metathesis octadiene Hammett analysis.

This report details the kinetic responses of nine compounds of type 6 [RCH:CH(CH2)2CH(OCH2Ph)CH2CH:CH2] to ring-closing metathesis as promoted by Grubbs’ Ru-dihydroimidazolylidene catalyst to give the identical product 7 [4-(benzyloxy)cyclohexene]. The exptl. observations have been subjected to Hammett anal. The ρ value for the composite aromatic derivatives (R = p-XC6H4-) differs from that of the aliphatic series, although both are neg. because electron-donating groups accelerate the reaction.

Organic Letters published new progress about Alkadienes Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), PROC (Process), RACT (Reactant or Reagent), PREP (Preparation). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Burgenske, Danielle M; Talele, Surabhi; Pokorny, Jenny L; Mladek, Ann C; Bakken, Katrina K; Carlson, Brett L; Schroeder, Mark A; He, Lihong; Hu, Zeng; Gampa, Gautham; Kosel, Matthew L; Decker, Paul A; Kitange, Gaspar J; Schmitt-Hoffmann, Anne; Bachmann, Felix; Vaubel, Rachael A; Eckel-Passow, Jeanette E; Giannini, Caterina; McSheehy, Paul; Lane, Heidi A; Elmquist, William F; Sarkaria, Jann N published the artcile< Preclinical modeling in glioblastoma patient-derived xenograft (GBM PDX) xenografts to guide clinical development of lisavanbulin-a novel tumor checkpoint controller targeting microtubules.>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is drug efficacy; glioblastoma; microtubule-targeting agents; patient-derived xenografts.

BACKGROUND: Glioblastoma (GBM) is an incurable disease with few approved therapeutic interventions. Radiation therapy (RT) and temozolomide (TMZ) remain the standards of care. The efficacy and optimal deployment schedule of the orally bioavailable small-molecule tumor checkpoint controller lisavanbulin alone, and in combination with, standards of care were assessed using a panel of IDH-wildtype GBM patient-derived xenografts. METHODS: Mice bearing intracranial tumors received lisavanbulin +/-RT +/-TMZ and followed for survival. Lisavanbulin concentrations in plasma and brain were determined by liquid chromatography with tandem mass spectrometry, while flow cytometry was used for cell cycle analysis. RESULTS: Lisavanbulin monotherapy showed significant benefit (P < .01) in 9 of 14 PDXs tested (median survival extension 9%-84%) and brain-to-plasma ratios of 1.3 and 1.6 at 2- and 6-hours postdose, respectively, validating previous data suggesting significant exposure in the brain. Prolonged lisavanbulin dosing from RT start until moribund was required for maximal benefit (GBM6: median survival lisavanbulin/RT 90 vs. RT alone 69 days, P = .0001; GBM150: lisavanbulin/RT 143 days vs. RT alone 73 days, P = .06). Similar observations were seen with RT/TMZ combinations (GBM39: RT/TMZ/lisavanbulin 502 days vs. RT/TMZ 249 days, P = .0001; GBM26: RT/TMZ/lisavanbulin 172 days vs. RT/TMZ 121 days, P = .04). Immunohistochemical analyses showed a significant increase in phospho-histone H3 with lisavanbulin treatment (P = .01). CONCLUSIONS: Lisavanbulin demonstrated excellent brain penetration, significant extension of survival alone or in RT or RT/TMZ combinations, and was associated with mitotic arrest. These data provide a strong clinical rationale for testing lisavanbulin in combination with RT or RT/TMZ in GBM patients. Neuro-oncology published new progress about 112-63-0. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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

Lee, Yeong-Beom; Young Woo, Han; Yoon, Chong-Bok; Shim, Hong-Ku published the artcile< Simple synthetic route to soluble polyimides via nitro-displacement reaction and their second-order nonlinear optical properties>, Application of C19H34O2, the main research area is polyimide preparation second order NLO property.

Nonlinear optical (NLO) functionalized polyimides were directly synthesized using the nitro-displacement reaction between an alkanediol monomer and a diimide monomer without a thermal curing step. The polyimides were soluble in aprotic polar solvents such as DMSO, dimethylacetamide, DMF, and N-methylpyrrolidone, and showed glass transitions at temperatures between 172 and 198°C. We observed good thermal stability up to around 300°C (at 5% weight loss) for the polymers. The weight-average mol. weights of the resulting polymers were 10,400-15,100 (Mw/Mn = 1.84-2.00). The poled polymer films showed good nonlinearity (d33 = 76 pm V-1) in the Maker fringe method for second harmonic generation.

Journal of Materials Chemistry published new progress about Polyamines, polyether-polyimide- Role: PRP (Properties), SPN (Synthetic Preparation), PREP (Preparation). 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

Ogretir, Cemil; Yarligan, Selma published the artcile< AM1 and PM3 study of the protonation tautomerization and valence tautomerization of some 4-substituted imidazoles>, Application of C19H34O2, the main research area is MO protonation tautomerization substituted imidazole; valence tautomerization substituted imidazole.

The gas-phase geometries, relative stabilities, ionization potentials and proton affinities of the different tautomers of some 4-substituted imidazoles and their N-Me derivatives were calculated with full geometry optimization. The predominance of the a (i.e. 1H-form) form with an electron-acceptor group at the 4-position over the b (i.e. 3H-form) form and the predominance of the b (i.e. 3H-form) form with an electron-donor group at the 4-position over the a (i.e. 1H-form) form were confirmed. A correlation between exptl. obtained acidity constants, pKa, and calculated proton affinities was detected.

Journal of Molecular Structure: THEOCHEM published new progress about AM1 (molecular orbital method). 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

Zhang, Di; Yang, Bing; Chang, Shi-Quan; Ma, Sheng-Suo; Sun, Jian-Xin; Yi, Lin; Li, Xing; Shi, Hui-Mei; Jing, Bei; Zheng, Ya-Chun; Zhang, Chun-Lan; Chen, Feng-Guo; Zhao, Guo-Ping published the artcile< Protective effect of paeoniflorin on H2O2 induced Schwann cells injury based on network pharmacology and experimental validation>, SDS of cas: 112-63-0, the main research area is paeoniflorin neuroprotectant Schwann cell cytotoxicity apoptosis neurol disorder; H(2)O(2); Hydrogen peroxide; Network pharmacology; Paeoniflorin; Schwann cells; p38MAPK.

This study was to investigate the protective effect of paeoniflorin (PF) on hydrogen peroxide-induced injury. Firstly, “”SMILES”” of PF was searched in Pubchem and further was used for reverse mol. docking in Swiss Target Prediction database to obtain potential targets. Injury-related mols. were obtained from GeenCards database, and the predicted targets of PF for injury treatment were selected by Wayne diagram. For mechanism anal., the protein-protein interactions were constructed by String, and the KEGG anal. was conducted in Webgestalt. Then, cell viability and cytotoxicity assay were established by CCK8 assay. Also, the exptl. cells were allocated to control, model (200μmol·L-1 H2O2), SB203580 10μmol·L-1 (200μmol·L-1 H2O2+ SB203580 10μmol·L-1), PF 50μmol·L-1 (200μmol·L-1 H2O2+ PF 50μmol·L-1), and PF 100μmol·L-1 (200μmol·L-1 H2O2+ PF 100μmol·L-1) groups. We measured the intracellular ROS, Hoechst 33258 staining, cell apoptosis, the levels of Bcl-xl, Bcl-2, Caspase-3, Cleaved-caspase3, Cleaved-caspase7, TRPA1, TRPV1, and the phosphorylation expression of p38MAPK. There are 96 potential targets that may be associated with PF for injury treatment. Then, we chose the “”Inflammatory mediator regulation of TRP channels”” pathway for the exptl. verification from the first 10 KEGG pathway. In exptl. verification, H2O2 decreased the cell viability moderately (P < 0.05), and 100μmol·L -1 PF increased the cell viability significantly (P < 0.05). Depending on the difference of intracellular ROS fluorescence intensity, PF inhibited H 2O2-induced reactive oxygen species production in Schwann cells. In Hoechst 33258 staining, PF reversed the condensed chromatin and apoptotic nuclei following H2O2 treatment. Moreover, Flow cytometry results showed that PF could substantially inhibit H2O2 induced apoptosis (P < 0.05). Pretreatment with PF obviously reduced the levels of Caspase3, Cleaved-caspase3, Cleaved-caspase7, TRPA1, TRPV1, and the phosphorylation expression of p38MAPK after H 2O2 treatment (P < 0.05), increased the levels of Bcl-2, and Bcl-xl ( P < 0.05). PF inhibited Schwann cell injury and apoptosis induced by hydrogen peroxide, which mechanism was linked to the inhibition of phosphorylation of p38MAPK. Chinese Journal of Natural Medicines (Amsterdam, Netherlands) published new progress about Apoptosis. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, SDS of cas: 112-63-0.

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

Liao, Chengheng; Glodowski, Cherise Ryan; Fan, Cheng; Liu, Juan; Mott, Kevin R.; Kaushik, Akash; Vu, Hieu; Locasale, Jason W.; McBrayer, Samuel K.; DeBerardinis, Ralph J.; Perou, Charles M.; Zhang, Qing published the artcile< Integrated metabolic profiling and transcriptional analysis reveals therapeutic modalities for targeting rapidly proliferating breast cancers>, Electric Literature of 112-63-0, the main research area is metabolomics transcriptional analysis therapeutic modality triple neg breast cancer.

Metabolic dysregulation is a prominent feature in breast cancer, but it remains poorly characterized in patient tumors. In this study, untargeted metabolomics anal. of triple-neg. breast cancer (TNBC) and patient with estrogen receptor (ER)-pos. breast cancer samples, as well as TNBC patient-derived xenografts (PDX), revealed two major metabolic groups independent of breast cancer histol. subtypes: a “”Nucleotide/Carbohydrate-Enriched”” group and a “”Lipid/Fatty Acid-Enriched”” group. Cell lines grown in vivo more faithfully recapitulated the metabolic profiles of patient tumors compared with those grown in vitro. Integrated metabolic and gene expression analyzes identified genes that strongly correlate with metabolic dysregulation and predict patient prognosis. As a proof of principle, targeting Nucleotide/Carbohydrate-Enriched TNBC cell lines or PDX xenografts with a pyrimidine biosynthesis inhibitor or a glutaminase inhibitor led to therapeutic efficacy. In multiple in vivo models of TNBC, treatment with the pyrimidine biosynthesis inhibitor conferred better therapeutic outcomes than chemotherapeutic agents. This study provides a metabolic stratification of breast tumor samples that can guide the selection of effective therapeutic strategies targeting breast cancer subsets. In addition, we have developed a public, interactive data visualization portal based on the data generated from this study to facilitate future research.

Cancer Research published new progress about Biomarkers. 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

Gaff, Jessica; Pillay, Prinisha; Cherry, Catherine; Laws, Simon M.; Price, Patricia; Kamerman, Peter published the artcile< The role of CAMKK2 polymorphisms in HIV-associated sensory neuropathy in South Africans>, COA of Formula: C19H34O2, the main research area is antiretroviral CAMKK2 gene polymorphism HIV sensory neuropathy; Antiretroviral therapy; CAMKK2; HIV-associated sensory neuropathy; Haplotypes; Polymorphisms.

Human immunodeficiency virus-associated sensory neuropathy (HIV-SN) is a common neurol. complication of HIV infection. It affected 57% of South African patients whose antiretroviral therapy (ART) included stavudine and was influenced by genotypes of the P2X-block (P2X7R, P2X4R and CAMKK2). We investigate associations between HIV-SN and P2X-block genotypes in patients who never received stavudine. An adjacent gene, ANAPC5, was included.75 HIV+ individuals were assessed using the Brief Peripheral Neuropathy Screen before treatment and after 6-8 mo on stavudine-free regimens. DNA was genotyped for 48 polymorphisms across the four genes using an OpenArray platform. Haplotypes were derived using fastPHASE. Associations with HIV-SN were assessed using bivariate and multivariate analyses. Nine individuals (12%) were diagnosed with HIV-SN prior to ART and a further 20 individuals (27%) developed HIV-SN within 6-8 mo. Five polymorphisms, rs503720*G (OR = 133) in P2X7R, rs10849861*A (OR = 5.99), rs1653586*T (OR = 67.8) and rs11065504*C (OR = 0.02) in CAMKK2, and rs2089886*A (OR = 6.68) in ANAPC5, associated with HIV-SN after adjusting for body weight, nadir CD4 T-cell counts and prior tuberculosis (model p < 0.0001, n = 69, Pseudo R2 = 0.54). Three CAMKK2 haplotypes were associated with HIV-SN (OR = 2.82, 3.42 and 6.85) after adjusting for body weight, nadir CD4 T-cell counts and prior tuberculosis (model p < 0.0005, n = 71, Pseudo R2 = 0.26). The results support a role for CAMKK2 in HIV-SN, independent of mechanisms invoked by stavudine. HIV-associated sensory neuropathy (HIV-SN) remains a clin. relevant complication of HIV infection and its treatment, affecting 38% of patients treated without neurotoxic stavudine. HIV-SN can impact an individual's ability to work and quality of life, with few effective therapeutic options, so an understanding of the underlying mechanisms would have clin. value. We confirm that CAMKK2 polymorphisms and haplotypes influence susceptibility to HIV-SN in South Africans treated without stavudine. This provides further evidence for a role for the protein encoded by CAMKK2 in the pathogenesis of HIV-SN, independent of mechanisms initiated by stavudine. Journal of the Neurological Sciences published new progress about Alleles. 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

Zhu, Hao; Tropsha, Alexander; Fourches, Denis; Varnek, Alexandre; Papa, Ester; Gramatica, Paola; Oberg, Tomas; Dao, Phuong; Cherkasov, Artem; Tetko, Igor V. published the artcile< Combinatorial QSAR Modeling of Chemical Toxicants Tested against Tetrahymena pyriformis>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is combinatorial QSAR consensus model Tetrahymena aquatic toxicity.

Selecting most rigorous quant. structure-activity relationship (QSAR) approaches is of great importance in the development of robust and predictive models of chem. toxicity. To address this issue in a systematic way, we have formed an international virtual collab. consisting of six independent groups with shared interests in computational chem. toxicol. We have compiled an aqueous toxicity data set containing 983 unique compounds tested in the same laboratory over a decade against Tetrahymena pyriformis. A modeling set including 644 compounds was selected randomly from the original set and distributed to all groups that used their own QSAR tools for model development. The remaining 339 compounds in the original set (external set I) as well as 110 addnl. compounds (external set II) published recently by the same laboratory (after this computational study was already in progress) were used as two independent validation sets to assess the external predictive power of individual models. In total, our virtual collab. has developed 15 different types of QSAR models of aquatic toxicity for the training set. The internal prediction accuracy for the modeling set ranged from 0.76 to 0.93 as measured by the leave-one-out cross-validation correlation coefficient (Qabs2). The prediction accuracy for the external validation sets I and II ranged from 0.71 to 0.85 (linear regression coefficient RabsI2) and from 0.38 to 0.83 (linear regression coefficient RabsII2), resp. The use of an applicability domain threshold implemented in most models generally improved the external prediction accuracy but at the same time led to a decrease in chem. space coverage. Finally, several consensus models were developed by averaging the predicted aquatic toxicity for every compound using all 15 models, with or without taking into account their resp. applicability domains. We find that consensus models afford higher prediction accuracy for the external validation data sets with the highest space coverage as compared to individual constituent models. Our studies prove the power of a collaborative and consensual approach to QSAR model development. The best validated models of aquatic toxicity developed by our collab. (both individual and consensus) can be used as reliable computational predictors of aquatic toxicity and are available from any of the participating laboratories

Journal of Chemical Information and Modeling published new progress about Aquatic toxicity. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

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