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https://www.readbyqxmd.com/read/28351019/online-microdialysis-ultra-performance-liquid-chromatography-mass-spectrometry-method-for-comparative-pharmacokinetic-investigation-on-iridoids-from-gardenia-jasminoides-ellis-in-rats-with-different-progressions-of-type-2-diabetic-complications
#1
Xueju Zhang, Lu Wang, Zhong Zheng, Zifeng Pi, Zhiqiang Liu, Fengrui Song
Iridoid glycosides consist the main bioactive constituents of Gardenia jasminoides Ellis (G. jasminoides), which is used alone or in combination with other medicine herbs for treatment of diabetes mellitus in China. This paper investigated for the first time comparative pharmacokinetics (PKs) of four unbound iridoids (including genipin, geniposide, gardenoside and geniposidic acid) in rat blood between healthy and type 2 diabetic groups with different disease progressions (9 or 13 weeks). Online microdialysis-ultra performance liquid chromatography-mass spectrometry (MD- UPLC-MS/MS) method was used after oral administration of iridoid extracts obtained from the fruits of G...
March 21, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28350871/oxygen-tension-regulates-the-mirna-profile-and-bioactivity-of-exosomes-released-from-extravillous-trophoblast-cells-liquid-biopsies-for-monitoring-complications-of-pregnancy
#2
Grace Truong, Dominic Guanzon, Vyjayanthi Kinhal, Omar Elfeky, Andrew Lai, Sherri Longo, Zarin Nuzhat, Carlos Palma, Katherin Scholz-Romero, Ramkumar Menon, Ben W Mol, Gregory E Rice, Carlos Salomon
Our understanding of how cells communicate has undergone a paradigm shift since the recent recognition of the role of exosomes in intercellular signaling. In this study, we investigated whether oxygen tension alters the exosome release and miRNA profile from extravillous trophoblast (EVT) cells, modifying their bioactivity on endothelial cells (EC). Furthermore, we have established the exosomal miRNA profile at early gestation in women who develop pre-eclampsia (PE) and spontaneous preterm birth (SPTB). HTR-8/SVneo cells were used as an EVT model...
2017: PloS One
https://www.readbyqxmd.com/read/28350803/pharmacogenomic-identification-of-small-molecules-for-lineage-specific-manipulation-of-subventricular-zone-germinal-activity
#3
Kasum Azim, Diane Angonin, Guillaume Marcy, Francesca Pieropan, Andrea Rivera, Vanessa Donega, Claudio Cantù, Gareth Williams, Benedikt Berninger, Arthur M Butt, Olivier Raineteau
Strategies for promoting neural regeneration are hindered by the difficulty of manipulating desired neural fates in the brain without complex genetic methods. The subventricular zone (SVZ) is the largest germinal zone of the forebrain and is responsible for the lifelong generation of interneuron subtypes and oligodendrocytes. Here, we have performed a bioinformatics analysis of the transcriptome of dorsal and lateral SVZ in early postnatal mice, including neural stem cells (NSCs) and their immediate progenies, which generate distinct neural lineages...
March 2017: PLoS Biology
https://www.readbyqxmd.com/read/28350456/starch-derived-nano-graphene-oxide-paves-the-way-for-electrospinnable-and-bioactive-starch-scaffolds-for-bone-tissue-engineering
#4
Duo Wu, Archana Samanta, Rajiv K Srivastava, Minna Hakkarainen
A straightforward process that enabled electrospinning of bioactive starch-based nanofiber scaffolds was developed by utilizing starch derived nano graphene oxide (nGO) as a property enhancer and formic acid as a solvent and esterification reagent. The reaction mechanism and process were followed by detailed spectroscopic investigation. Furthermore, the incorporation of nGO as a "green bioactive additive" endorsed starch nanofibrous scaffolds several advantageous functionalities including improved electrospinnability and thermal stability, good cytocompatibility, osteo-bioactivity, and retained biodegradability...
March 28, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28346994/gc-ms-analysis-and-potential-cytotoxic-activity-of-calyptranthes-grandifolia-o-berg-calyptranthes-tricona-d-legrand-and-myrciaria-plinioides-d-legrand-essential-oil-in-raw264-7-and-cho-k1-cells
#5
D Faleiro, S M Immich, F Majolo, L Mayer, E M Ethur, M I Goettert
The search for new bioactive substances derived from natural products is daily growing. Among biologically active products used in therapeutic approaches, essential oils are described with wide range of therapeutic and pharmacological potential. Plants from Myrtaceae family have the presence of essential oils in its composition. Calyptranthes grandifolia, Calyptranthes tricona and Myrciaria plinioides species belong to this family and are used by the local population. However, there are no reports in the literature describing relevant characteristics about the potential and possible activities of these species...
March 22, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28346797/substituted-borosilicate-glasses-with-improved-osteogenic-capacity-for-bone-tissue-engineering
#6
João S Fernandes, Piergiorgio Gentile, Aileen Crawford, Ricardo A Pires, Paul V Hatton, Rui L Reis
Borosilicate bioactive glasses (BBGs) have shown the capacity to promote higher formation of new bone when compared with silicate bioactive glasses. Herein, we assessed the capacity of BBGs to induce osteogenic differentiation of bone marrow mesenchymal stem cells (BM-MSCs) as a function of their substituted divalent cations (Mg(2+), Ca(2+), Sr(2+)). To this purpose, we synthesized BBG particles by melt quenching. The cell viability, proliferation, and morphology (i.e., PrestoBlue(®), PicoGreen(®), and DAPI and Phalloidin stainings, respectively), as well as protein expression (i...
March 27, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28346790/synthesis-of-chiral-%C3%AE-lactams-via-in-situ-elimination-iridium-catalyzed-asymmetric-hydrogenation-of-racemic-%C3%AE-hydroxy-%C3%AE-lactams
#7
Qianjia Yuan, Delong Liu, Wanbin Zhang
Chiral γ-lactams have been synthesized in excellent yields and enantioselectivities (up to 99% yield and 96% ee) from easily accessible racemic γ-hydroxy γ-lactams via an iridium-phosphoramidite catalyzed asymmetric hydrogenation. The reaction was designed based on insight into the reaction mechanism demonstrated in previous work and can be carried out at a reduced catalyst loading of 0.1 mol % on a gram scale. Several potential bioactive compounds can be synthesized from the reduced products. Mechanistic studies indicated that the reduced products were obtained via the hydrogenation of the N-acyliminium cations, generated from γ-hydroxy γ-lactams...
March 27, 2017: Organic Letters
https://www.readbyqxmd.com/read/28346788/three-step-catalytic-asymmetric-total-syntheses-of-13-methyltetrahydroprotoberberine-alkaloids
#8
Shiqiang Zhou, Rongbiao Tong
(S,R)-N-PINAP was identified to be the chiral ligand for highly enantioselective CuI-catalyzed reaction of tetrahydroisoquinolines (THIQs), alkynes, and 2-bromobenzaldehyde derivatives. This enables us to accomplish the first asymmetric total synthesis of 12 natural 13-methyltetrahydroprotoberberine (13-MeTHPB) alkaloids in only three catalytic steps with 47-64% overall yields. In addition, the Pd-catalyzed reductive Heck cyclization was successfully extended to three Pd-catalyzed domino reactions (Heck/Suzuki, Heck/Sonogashira, and Heck/Heck), which greatly expands the synthetic utility of this catalytic strategy and allows expeditious access to 13-substituted tetrahydroprotoberberines for further bioactivity evaluation...
March 27, 2017: Organic Letters
https://www.readbyqxmd.com/read/28346782/%C3%AE%C2%BA-carrageenan-enhances-the-biomineralization-and-osteogenic-differentiation-of-electrospun-phb-and-phbv-fibers
#9
Nowsheen Goonoo, Behnam Khanbabaee, Marc Steuber, Archana Bhaw-Luximon, Ulrich Jonas, Ullrich Pietsch, Dhanjay Jhurry, Holger Schönherr
Novel electrospun materials for bone tissue engineering were obtained by blending biodegradable polyhydroxybutyrate (PHB) or polyhydroxybutyrate valerate (PHBV) with the anionic sulfated polysaccharide κ-carrageenan (κ-CG) in varying ratios. In both systems, the two components phase separated as shown by FTIR, DSC and TGA. According to the contact angle data, κ-CG was localized preferentially at the fiber surface in PHBV/ κ-CG blends in contrast to PHB/ κ-CG, where the biopolymer was mostly found within the fiber...
March 27, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28346739/a-novel-approach-to-limit-chemical-deterioration-of-gilthead-sea-bream%C3%A2-sparus-aurata-%C3%A2-fillets-coating-with-electrospun-nanofibers-as-characterized-by-molecular-thermal-and-microstructural-properties
#10
Zafer Ceylan, Gulgun F Unal Sengor, Mustafa Tahsin Yilmaz
Coating of sea bream fillets with thymol loaded chitosan based electrospun nanofibers (TLCN) and chitosan based nanafibers (CN) has been presented a novel approach to delay chemical deterioration. We assessed CN and TLCN with respect of scanting of total volatile basic nitrogen (TVBN), trimethylamine (TMA), thiobarbituric acid (TBA) deterioration during cold storage condition. Electrospinning process was applied to obtain TLCN and CN. Both of nanofibers obtained from biopolymer and bioactive material were cylindrical, smooth, beadless...
March 27, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28346732/asiaticoside-hinders-the-invasive-growth-of-keloid-fibroblasts-through-inhibition-of-the-gdf-9-mapk-smad-pathway
#11
Xin Wu, Difei Bian, Yannong Dou, Zhunan Gong, Qian Tan, Yufeng Xia, Yue Dai
Higher expression of growth differentiation factor-9 (GDF-9) in keloids compared with hypertrophic scars and normal skin tissues has been reported recently. The present study was performed to investigate the role of GDF-9 in keloid pathogenesis, and to elucidate its implication for asiaticoside in the keloid management. The data showed that GDF-9 could enhance the proliferation, migration, and invasion of keloid fibroblasts (KFs), while it only slightly elevated collagen expression, indicating that the effect of GDF-9 was opposite to that of TGF-β1...
March 27, 2017: Journal of Biochemical and Molecular Toxicology
https://www.readbyqxmd.com/read/28346507/olive-oil-bioactives-protect-pigs-against-experimentally-induced-chronic-inflammation-independently-of-alterations-in-gut-microbiota
#12
Martin Liehr, Alessandro Mereu, Jose Javier Pastor, Jose Carlos Quintela, Stefanie Staats, Gerald Rimbach, Ignacio Rodolfo Ipharraguerre
Subclinical chronic inflammation (SCI) is associated with impaired animal growth. Previous work has demonstrated that olive-derived plant bioactives exhibit anti-inflammatory properties that could possibly counteract the growth-depressing effects of SCI. To test this hypothesis and define the underlying mechanism, we conducted a 30-day study in which piglets fed an olive-oil bioactive extract (OBE) and their control counterparts (C+) were injected repeatedly during the last 10 days of the study with increasing doses of Escherichia coli lipopolysaccharides (LPS) to induce SCI...
2017: PloS One
https://www.readbyqxmd.com/read/28346393/choerosponins-a-and-b-two-new-cytotoxic-bridged-ring-ketones-and-the-determination-of-their-absolute-configurations
#13
Chang-Wei Li, Bing Han, Bing Cai, Cheng-Bin Cui
Bioactivity-directed fractionation of antitumor compounds from the stem barks of Choerospondias axillaries (Roxb.) Burtt et Hill (Anacardiaceae) afforded two new cytotoxic bridged-ring ketones, choerosponins A (1) and B (2), and their structures were elucidated by spectroscopic methods; their stereochemistry was determined by NOE difference experiments, CD spectra and the modified Mosher's method. Compound 1 has a rare dioxatricyclo skeleton. Flow cytometry and SRB methods were employed to evaluate the antitumor activity of the two compounds against tsFT210, HCT-15, HeLa, A2780 and MCF-7 cell lines, and both of them showed strong cytotoxicity...
March 27, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28346381/multifaceted-applications-of-chitosan-in-cancer-drug-delivery-and-therapy
#14
REVIEW
Anish Babu, Rajagopal Ramesh
Chitosan is a versatile polysaccharide of biological origin. Due to the biocompatible and biodegradable nature of chitosan, it is intensively utilized in biomedical applications in scaffold engineering as an absorption enhancer, and for bioactive and controlled drug release. In cancer therapy, chitosan has multifaceted applications, such as assisting in gene delivery and chemotherapeutic delivery, and as an immunoadjuvant for vaccines. The present review highlights the recent applications of chitosan and chitosan derivatives in cancer therapy...
March 27, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28346380/constituents-of-the-roots-of-dichapetalum-pallidum-and-their-anti-proliferative-activity
#15
Dorcas Osei-Safo, Godwin Akpeko Dziwornu, Regina Appiah-Opong, Mary Anti Chama, Isaac Tuffour, Reiner Waibel, Richard Amewu, Ivan Addae-Mensah
As part of our search for bioactive compounds from the Dichapetalaceae, repeated chromatographic purification of the roots of a hitherto unexamined species, Dichapetalum pallidum, led to the isolation of the newly occurring 7-hydroxydichapetalin P (1) and the known dichapetalins A (2) and X (3). Also isolated were the known compounds friedelin-2,3-lactone (4), friedelan-3-one (6), friedelan-3β-ol (7) and pomolic (8), as well as the dipeptide aurantiamide acetate (5). The compounds were characterized by direct interpretation of their IR, 1D NMR and 2D NMR spectral data and by comparison of their physico-chemical data, including their chromatographic profiles, with the literature and authentic samples in our compound library for the genus Dichapetalum...
March 27, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28346340/a-place-to-call-home-an-analysis-of-the-bacterial-communities-in-two-tethya-rubra-samaai-and-gibbons-2005-populations-in-algoa-bay-south-africa
#16
Samantha C Waterworth, Meesbah Jiwaji, Jarmo-Charles J Kalinski, Shirley Parker-Nance, Rosemary A Dorrington
Sponges are important sources of bioactive secondary metabolites. These compounds are frequently synthesized by bacterial symbionts, which may be recruited from the surrounding seawater or transferred to the sponge progeny by the parent. In this study, we investigated the bacterial communities associated with the sponge Tethya rubra Samaai and Gibbons 2005. Sponge specimens were collected from Evans Peak and RIY Banks reefs in Algoa Bay, South Africa and taxonomically identified by spicule analysis and molecular barcoding...
March 25, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28346089/a-chemogenomic-screening-platform-used-to-identify-chemotypes-perturbing-hsp90-pathways
#17
Fiona M Thomas, Kourtney M Goode, Bartek Rajwa, Andrew B Bieberich, Larisa V Avramova, Tony R Hazbun, V Jo Davisson
Compounds that modulate the heat shock protein (HSP) network have potential in a broad range of research applications and diseases. A yeast-based liquid culture assay that measured time-dependent turbidity enabled the high-throughput screening of different Saccharomyces cerevisae strains to identify HSP modulators with unique molecular mechanisms. A focused set of four strains, with differing sensitivities to Hsp90 inhibitors, was used to screen a compound library of 3680 compounds. Computed turbidity curve functions were used to classify strain responses and sensitivity to chemical effects across the compound library...
January 1, 2017: SLAS Discov
https://www.readbyqxmd.com/read/28346030/antimicrobial-activity-of-eugenol-and-essential-oils-containing-eugenol-a-mechanistic-viewpoint
#18
Anna Marchese, Ramona Barbieri, Erika Coppo, Ilkay Erdogan Orhan, Maria Daglia, Seyed Fazel Nabavi, Morteza Izadi, Mohammad Abdollahi, Seyed Mohammad Nabavi, Marjan Ajami
Eugenol is a hydroxyphenyl propene, naturally occurring in the essential oils of several plants belonging to the Lamiaceae, Lauraceae, Myrtaceae, and Myristicaceae families. It is one of the major constituents of clove (Syzygium aromaticum (L.) Merr. & L.M. Perry, Myrtaceae) oil and is largely used in both foods and cosmetics as a flavoring agent. A large body of recent scientific evidence supports claims from traditional medicine that eugenol exerts beneficial effects on human health. These effects are mainly associated with antioxidant and anti-inflammatory activities...
March 27, 2017: Critical Reviews in Microbiology
https://www.readbyqxmd.com/read/28345698/ethylcellulose-oleogels-for-lipophilic-bioactive-delivery-effect-of-oleogelation-on-in-vitro-bioaccessibility-and-stability-of-beta-carotene
#19
Chloe M O Sullivan, Maya Davidovich-Pinhas, Amanda J Wright, Shai Barbut, Alejandro G Marangoni
The in vitro lipolysis and β-carotene (BC) transfer from oil to aqueous phase of canola oil ethylcellulose (EC) oleogels were measured using a static monocompartmental model simulating oral, gastric, and duodenal digestive stages. The effects of EC oleogelation on gel in vitro digestibility were examined, using un-structured canola oil as a control. The physicochemical properties of oleogels containing BC were also measured. It was found that oleogels made with 10% 10 cP and 10% 20 cP did not differ significantly in their extent of lipolysis or BC transfer compared to canola oil; however 10% 45 cP and 15...
March 27, 2017: Food & Function
https://www.readbyqxmd.com/read/28345623/liposomes-loaded-with-bioactive-lipids-enhance-antibacterial-innate-immunity-irrespective-of-drug-resistance
#20
Noemi Poerio, Francesca Bugli, Francesco Taus, Marilina B Santucci, Carlo Rodolfo, Francesco Cecconi, Riccardo Torelli, Francesco Varone, Riccardo Inchingolo, Fabio Majo, Vincenzina Lucidi, Sabrina Mariotti, Roberto Nisini, Maurizio Sanguinetti, Maurizio Fraziano
Phagocytosis is a key mechanism of innate immunity, and promotion of phagosome maturation may represent a therapeutic target to enhance antibacterial host response. Phagosome maturation is favored by the timely and coordinated intervention of lipids and may be altered in infections. Here we used apoptotic body-like liposomes (ABL) to selectively deliver bioactive lipids to innate cells, and then tested their function in models of pathogen-inhibited and host-impaired phagosome maturation. Stimulation of macrophages with ABLs carrying phosphatidic acid (PA), phosphatidylinositol 3-phosphate (PI3P) or PI5P increased intracellular killing of BCG, by inducing phagosome acidification and ROS generation...
March 27, 2017: Scientific Reports
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