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Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry

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https://www.readbyqxmd.com/read/29772847/optimisation-of-ethanol-reflux-extraction-of-saponins-from-steamed-panax-notoginseng-by-response-surface-methodology-and-evaluation-of-hematopoiesis-effect
#1
Yupiao Hu, Xiuming Cui, Zejun Zhang, Lijuan Chen, Yiming Zhang, Chengxiao Wang, Xiaoyan Yang, Yuan Qu, Yin Xiong
The present study aims to optimize the ethanol-reflux extraction conditions for extracting saponins from steamed Panax notoginseng (SPN). Four variables including the extraction time (0.5⁻2.5 h), ethanol concentration (50⁻90%), water to solid ratio (W/S, 8⁻16), and times of extraction (1⁻5) were investigated by using the Box-Behnken design response surface methodology (BBD-RSM). For each response, a second-order polynomial model with high R² values (>0.9690) was developed using multiple linear regression analysis and the optimum conditions to maximize the yield (31...
May 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772836/soybean-hop-alleviates-estrogen-deficiency-related-bone-loss-and-metabolic-dysfunction-in-ovariectomized-rats-fed-a-high-fat-diet
#2
Dasom Noh, Yeni Lim, Hansol Lee, Hyejin Kim, Oran Kwon
Soybeans and hops have been traditionally used as a natural estrogen replacement therapy and their major active ingredients, isoflavones and prenylflavanones, are known to have estrogenic/antiestrogenic effects depending on the target organ. However, their potential benefits are still subject to controversies. The present study investigated the dual effect of soy isoflavones plus hop prenylflavanones (Soy-Hop) on bone loss and metabolic dysfunction under estrogen deficient condition. Rats were sham-operated ( n = 10) or ovariectomized (OVX; n = 40) and then fed a high-fat diet (HFD) to develop hyperlipidemia in OVX rats within the experimental period of 8 weeks...
May 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772824/characterization-of-cyclodextrin-volatile-inclusion-complexes-a-review
#3
REVIEW
Miriana Kfoury, David Landy, Sophie Fourmentin
Cyclodextrins (CDs) are a family of cyclic oligosaccharides that constitute one of the most widely used molecular hosts in supramolecular chemistry. Encapsulation in the hydrophobic cavity of CDs positively affects the physical and chemical characteristics of the guests upon the formation of inclusion complexes. Such a property is interestingly employed to retain volatile guests and reduce their volatility. Within this scope, the starting crucial point for a suitable and careful characterization of an inclusion complex is to assess the value of the formation constant (Kf ), also called stability or binding constant...
May 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772811/phenolic-compositions-and-antioxidant-activities-differ-significantly-among-sorghum-grains-with-different-applications
#4
Shuyu Shen, Rui Huang, Charlie Li, Wenyan Wu, Honglin Chen, John Shi, Shiguo Chen, Xingqian Ye
Sorghum grains with different applications had different phenolic profiles, which were corresponded to various antioxidant capacities. In this study, total phenolic, proanthocyanidins and flavonoids contents, as well as contents of individual phenolic compounds from sorghum grains with various applications were determined, and their antioxidant capacities were evaluated. Total phenolic contents (TPC) and total proanthocyanidins contents (TPAC) showed strong correlation with antioxidant activities ( r > 0...
May 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772800/identification-and-expression-of-mirnas-related-to-female-flower-induction-in-walnut-juglans-regia-l
#5
Li Zhou, Shaowen Quan, Hang Xu, Li Ma, Jianxin Niu
Flower induction is an essential stage in walnut ( Juglans regia L.) trees, directly affecting yield, yield stability, fruit quality and commodity value. The objective of this study was to identify miRNAs related to female flower induction via high-throughput sequencing and bioinformatics analysis. A total of 123 miRNAs were identified including 51 known miRNAs and 72 novel miRNAs. Differential expression was observed in 19 of the known miRNAs and 34 of the novel miRNAs. Twelve miRNAs were confirmed by RT-qPCR...
May 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772798/interrelationships-between-fatty-acid-composition-staphyloxanthin-content-fluidity-and-carbon-flow-in-the-staphylococcus-aureus-membrane
#6
Kiran B Tiwari, Craig Gatto, Brian J Wilkinson
Fatty acids play a major role in determining membrane biophysical properties. Staphylococcus aureus produces branched-chain fatty acids (BCFAs) and straight-chain saturated fatty acids (SCSFAs), and can directly incorporate exogenous SCSFAs and straight-chain unsaturated fatty acids (SCUFAs). Many S. aureus strains produce the triterpenoid pigment staphyloxanthin, and the balance of BCFAs, SCSFAs and staphyloxanthin determines membrane fluidity. Here, we investigated the relationship of fatty acid and carotenoid production in S...
May 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772795/identification-of-insecticidal-constituents-from-the-essential-oil-from-the-aerial-parts-stachys-riederi-var-japonica
#7
Meirong Quan, Qi Zhi Liu, Zhi Long Liu
The essential oil of Stachys riederi var. japonica (Family: Lamiaceae) was extracted by hydrodistillation and determined by GC and GC-MS. A total of 40 components were identified, representing 96.01% of the total oil composition. The major compounds in the essential oil were acetanisole (15.43%), anisole (9.43%), 1,8-cineole (8.07%), geraniol (7.89%), eugenol (4.54%), caryophyllene oxide (4.47%), caryophyllene (4.21%) and linalool (4.07%). Five active constituents (acetanisole, anisole, 1,8-cineole, eugenol and geraniol) were identified by bioactivity-directed fractionation...
May 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772791/compounds-identification-in-semen-cuscutae-by-ultra-high-performance-liquid-chromatography-uplcs-coupled-to-electrospray-ionization-mass-spectrometry
#8
Ying Zhang, Hui Xiong, Xinfang Xu, Xue Xue, Mengnan Liu, Shuya Xu, Huan Liu, Yan Gao, Hui Zhang, Xiangri Li
Semen Cuscutae is commonly used in traditional Chinese medicine and contains a series of compounds such as flavonoids, chlorogenic acids and lignans. In this study, we identified different kinds of compositions by ultra-high-performance liquid chromatography (UPLC) coupled to electrospray ionization mass spectrometry (MS). A total of 45 compounds were observed, including 20 chlorogenic acids, 23 flavonoids and 2 lignans. 23 of them are reported for the first time including 6- O -caffeoyl- β -glucose, 3- O -(4'- O -Caffeoylglucosyl) quinic acid, etc...
May 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772776/pyrrole-alkaloids-from-the-edible-mushroom-phlebopus-portentosus-with-their-bioactive-activities
#9
Zhaocui Sun, Meigeng Hu, Zhonghao Sun, Nailiang Zhu, Junshan Yang, Guoxu Ma, Xudong Xu
Seven pyrrole alkaloids, three of which are novel (phlebopines A⁻C ( 1 ⁻ 3 )), were isolated from the fruiting bodies of the edible mushroom Phlebopus portentosus . Their structures were determined on the basis of spectroscopic data. All the isolated compounds were tested for their neuroprotective properties and acetylcholine esterase (AChE) inhibition activities. Compound 7 displayed remarkable neuroprotective effects against hydrogen peroxide (H₂O₂)-induced neuronal-cell damage in human neuroblastoma SH-SY5Y cells...
May 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772774/selected-plant-metabolites-involved-in-oxidation-reduction-processes-during-bud-dormancy-and-ontogenetic-development-in-sweet-cherry-buds-prunus-avium-l
#10
Susanne Baldermann, Thomas Homann, Susanne Neugart, Frank-M Chmielewski, Klaus-Peter Götz, Kristin Gödeke, Gerd Huschek, Getrud E Morlock, Harshadrai M Rawel
Many biochemical processes are involved in regulating the consecutive transition of different phases of dormancy in sweet cherry buds. An evaluation based on a metabolic approach has, as yet, only been partly addressed. The aim of this work, therefore, was to determine which plant metabolites could serve as biomarkers for the different transitions in sweet cherry buds. The focus here was on those metabolites involved in oxidation-reduction processes during bud dormancy, as determined by targeted and untargeted mass spectrometry-based methods...
May 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772750/the-late-embryogenesis-abundant-protein-family-in-cassava-manihot-esculenta-crantz-genome-wide-characterization-and-expression-during-abiotic-stress
#11
Chunlai Wu, Wei Hu, Yan Yan, Weiwei Tie, Zehong Ding, Jianchun Guo, Guangyuan He
Late embryogenesis abundant (LEA) proteins, as a highly diverse group of polypeptides, play an important role in plant adaptation to abiotic stress; however, LEAs from cassava have not been studied in cassava. In this study, 26 LEA members were genome-wide identified from cassava, which were clustered into seven subfamily according to evolutionary relationship, protein motif, and gene structure analyses. Chromosomal location and duplication event analyses suggested that 26 MeLEAs distributed in 10 chromosomes and 11 MeLEA paralogues were subjected to purifying selection...
May 17, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772747/involvement-of-cyp4f2-in-the-metabolism-of-a-novel-monophosphate-ester-prodrug-of-gemcitabine-and-its-interaction-potential-in-vitro
#12
Yedong Wang, Yuan Li, Jia Lu, Huixin Qi, Isabel Cheng, Hongjian Zhang
Compound- 3 is an oral monophosphate prodrug of gemcitabine. Previous data showed that Compound- 3 was more potent than gemcitabine and it was orally active in a tumor xenograft model. In the present study, the metabolism of Compound- 3 was investigated in several well-known in vitro matrices. While relatively stable in human and rat plasma, Compound- 3 demonstrated noticeable metabolism in liver and intestinal microsomes in the presence of NADPH and human hepatocytes. Compound- 3 could also be hydrolyzed by alkaline phosphatase, leading to gemcitabine formation...
May 16, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772722/ethnobotany-phytochemistry-and-pharmacological-effects-of-plants-in-genus-cynanchum-linn-asclepiadaceae
#13
REVIEW
Lu Han, Xiuping Zhou, Mengmeng Yang, Li Zhou, Xinxin Deng, Shijie Wei, Wenping Wang, Zhizhong Wang, Xue Qiao, Changcai Bai
Genus Cynanchum L. belongs to the family Asclepiadaceae, which comprise more than 200 species distributed worldwide. In Chinese medical practice, numerous drugs (such as tablets and powders) containing different parts of plants of this genus are used to treat snake bites, bruises, osteoblasts, rheumatoid arthritis and tumors. A search for original articles published on the cynanchum genus was performed by using several resources, including Flora of China Official Website and various scientific databases, such as PubMed, SciFinder, the Web of Science, Science Direct, and China Knowledge Resource Integrated (CNKI)...
May 16, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772720/molecular-diversity-by-olefin-cross-metathesis-on-solid-support-generation-of-libraries-of-biologically-promising-%C3%AE-lactam-derivatives
#14
Luciana Méndez, Andrés A Poeylaut-Palena, Ernesto G Mata
The application of the reagent-based diversification strategy for generation of libraries of biologically promising β-lactam derivatives is described. Key features are the versatility of the linker used and the cross-metathesis functionalization at the cleavage step. From an immobilized primary library, diversity was expanded by applying different cleavage conditions, leading to a series of cholesterol absorption inhibitor analogues together with interesting hybrid compounds through incorporation of a chalcone moiety...
May 16, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772716/kinetic-basis-of-the-bifunctionality-of-ssoii-dna-methyltransferase
#15
Nadezhda A Timofeyeva, Alexandra Yu Ryazanova, Maxim V Norkin, Tatiana S Oretskaya, Olga S Fedorova, Elena A Kubareva
Type II restriction⁻modification (RM) systems are the most widespread bacterial antiviral defence mechanisms. DNA methyltransferase SsoII (M.SsoII) from a Type II RM system SsoII regulates transcription in its own RM system in addition to the methylation function. DNA with a so-called regulatory site inhibits the M.SsoII methylation activity. Using circular permutation assay, we show that M.SsoII monomer induces DNA bending of 31° at the methylation site and 46° at the regulatory site. In the M.SsoII dimer bound to the regulatory site, both protein subunits make equal contributions to the DNA bending, and both angles are in the same plane...
May 16, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772697/structure-activity-relationships-based-on-3d-qsar-comfa-comsia-and-design-of-aryloxypropanol-amine-agonists-with-selectivity-for-the-human-%C3%AE-3-adrenergic-receptor-and-anti-obesity-and-anti-diabetic-profiles
#16
Marcos Lorca, Cesar Morales-Verdejo, David Vásquez-Velásquez, Juan Andrades-Lagos, Javier Campanini-Salinas, Jorge Soto-Delgado, Gonzalo Recabarren-Gajardo, Jaime Mella
The wide tissue distribution of the adrenergic β3 receptor makes it a potential target for the treatment of multiple pathologies such as diabetes, obesity, depression, overactive bladder (OAB), and cancer. Currently, there is only one drug on the market, mirabegron, approved for the treatment of OAB. In the present study, we have carried out an extensive structure-activity relationship analysis of a series of 41 aryloxypropanolamine compounds based on three-dimensional quantitative structure-activity relationship (3D-QSAR) techniques...
May 16, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772690/peritoneal-carcinomatosis-targeting-with-tumor-homing-peptides
#17
REVIEW
Lorena Simón-Gracia, Hedi Hunt, Tambet Teesalu
Over recent decades multiple therapeutic approaches have been explored for improved management of peritoneally disseminated malignancies-a grim condition known as peritoneal carcinomatosis (PC). Intraperitoneal (IP) administration can be used to achieve elevated local concentration and extended half-life of the drugs in the peritoneal cavity to improve their anticancer efficacy. However, IP-administered chemotherapeutics have a short residence time in the IP space, and are not tumor selective. An increasing body of work suggests that functionalization of drugs and nanoparticles with targeting peptides increases their peritoneal retention and provides a robust and specific tumor binding and penetration that translates into improved therapeutic response...
May 16, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772679/antioxidant-and-ace-inhibitory-activity-of-enzymatic-hydrolysates-from-ruditapes-philippinarum
#18
Yue Yu, Fengjiao Fan, Di Wu, Cuiping Yu, Zhenyu Wang, Ming Du
Ruditapes philippinarum proteins were hydrolyzed by trypsin, neutrase, and pepsin. The antioxidant activities and ACE inhibitory activity of hydrolysates were analyzed and the antioxidant activities were related to their molecular weight distribution and amino acid compositions. Results indicated the hydrolysis of proteins led to an increase in small peptides and free amino acids. The antioxidant activities of Ruditapes philippinarum hydrolysates against DPPH radical scavenging, inhibition on linoleic acid peroxidation, and reducing power showed that the neutrase hydrolysate exhibited the strongest antioxidant activity...
May 16, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772655/antioxidant-activity-and-hepatoprotective-potential-of-quercetin-7-rhamnoside-in-vitro-and-in-vivo
#19
Zhi-Qiang Huang, Pan Chen, Wei-Wei Su, Yong-Gang Wang, Hao Wu, Wei Peng, Pei-Bo Li
Hypericum japonicum is traditionally used as a folk medicine to treat cholestasis and hepatitis. Quercetin 7-rhamnoside (Q7R) is one of the main flavonoid components of Hypericum japonicum and has been rarely studied. The aim of the present study was to evaluate the antioxidant activity and hepatoprotective potential of Q7R. In the in vitro experiments, DPPH, ABTS and ferric reducing antioxidant power (FRAP) assays were first performed to assess the antioxidant properties of Q7R, and then a H₂O₂-induced oxidative damage cellular model was used to determine the cytoprotective and antioxidant properties of Q7R in human liver L-02 cells...
May 16, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29772647/the-antimicrobial-activity-of-annona-emarginata-schltdl-h-rainer-and-most-active-isolated-compounds-against-clinically-important-bacteria
#20
Juan G Dolab, Beatriz Lima, Ewelina Spaczynska, Jiri Kos, Natividad H Cano, Gabriela Feresin, Alejandro Tapia, Francisco Garibotto, Elisa Petenatti, Monica Olivella, Robert Musiol, Josef Jampilek, Ricardo D Enriz
Annona emarginata (Schltdl.) H. Rainer, commonly known as "arachichú", "araticú", "aratigú", and "yerba mora", is a plant that grows in Argentina. Infusions and decoctions are used in folk medicine as a gargle against throat pain and for calming toothache; another way to use the plant for these purposes is chewing its leaves. Extracts from bark, flowers, leaves, and fruits from A. emarginata were subjected to antibacterial assays against a panel of Gram (+) and Gram (-) pathogenic bacteria according to Clinical and Laboratory Standards Institute protocols...
May 16, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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