keyword
MENU ▼
Read by QxMD icon Read
search

Natural scaffold

keyword
https://www.readbyqxmd.com/read/28718680/development-of-emu-oil-loaded-pcl-collagen-bioactive-nanofibers-for-proliferation-and-stemness-preservation-of-human-adipose-derived-stem-cell-possible-application-in-regenerative-medicine
#1
Kazem Nejati-Koshki, Younes Pilehvar-Soltanahmadi, Effat Alizadeh, Abbas Ebrahimi-Kalan, Yousef Mortazavi, Nosratollah Zarghami
Adipose tissue-derived stem cells (ASCs) are promising candidate in stem cell therapies, and maintaining their stemness potential is vital to achieve effective treatment. Natural based scaffolds have been recently attracted increasing attention in nanomedicine and drug delivery. In the present study, a polymeric nanofibrous scaffold was developed based on the polycaprolactone/Collagen (PCL/Coll) containing Emu oil as a bioactive material to induce the proliferation of ASCs, while simultaneously preserve the stemness property of those cells...
July 18, 2017: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/28718636/long-chain-alkyl-esters-of-hydroxycinnamic-acids-as-promising-anticancer-agents-selective-induction-of-apoptosis-in-cancer-cells
#2
José C J M D S Menezes, Najmeh Edraki, Shrivallabh Kamat, Mahsima Khoshneviszadeh, Zahra Kayani, Hossein Hadavand Mirzaei, Ramin Miri, Nasrollah Erfani, Maryam Nejati, José A S Cavaleiro, Tiago B Silva, Luciano Saso, Fernanda M Borges, Omidreza Firuzi
Cancer is the major cause of morbidity and mortality worldwide. Hydroxycinnamic acids (HCAs) are naturally-occurring compounds and their alkyl esters may possess enhanced biological activities. We evaluated C4, C14, C16 and C18 alkyl esters of p-coumaric, ferulic, sinapic and caffeic acids (19 compounds) for their cytotoxic activity against four human cancer cells and also examined their effect on cell cycle alteration and apoptosis induction. The tetradecyl (1c) and hexadecyl (1d) esters of p-coumaric acid and tetradecyl ester of caffeic acid (4c), but not the parental HCAs, were selectively effective against MOLT-4 (human lymphoblastic leukemia) cells with IC50 values of 0...
July 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28717194/rapid-production-of-human-liver-scaffolds-for-functional-tissue-engineering-by-high-shear-stress-oscillation-decellularization
#3
Giuseppe Mazza, Walid Al-Akkad, Andrea Telese, Lisa Longato, Luca Urbani, Benjamin Robinson, Andrew Hall, Kenny Kong, Luca Frenguelli, Giusi Marrone, Oliver Willacy, Mohsen Shaeri, Alan Burns, Massimo Malago, Janet Gilbertson, Nigel Rendell, Kevin Moore, David Hughes, Ioan Notingher, Gavin Jell, Armando Del Rio Hernandez, Paolo De Coppi, Krista Rombouts, Massimo Pinzani
The development of human liver scaffolds retaining their 3-dimensional structure and extra-cellular matrix (ECM) composition is essential for the advancement of liver tissue engineering. We report the design and validation of a new methodology for the rapid and accurate production of human acellular liver tissue cubes (ALTCs) using normal liver tissue unsuitable for transplantation. The application of high shear stress is a key methodological determinant accelerating the process of tissue decellularization while maintaining ECM protein composition, 3D-architecture and physico-chemical properties of the native tissue...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28714313/artificial-metalloenzymes-reaction-scope-and-optimization-strategies
#4
Fabian Schwizer, Yasunori Okamoto, Tillmann Heinisch, Yifan Gu, Michela M Pellizzoni, Vincent Lebrun, Raphael Reuter, Valentin Köhler, Jared C Lewis, Thomas R Ward
The incorporation of a synthetic, catalytically competent metallocofactor into a protein scaffold to generate an artificial metalloenzyme (ArM) has been explored since the late 1970's. Progress in the ensuing years was limited by the tools available for both organometallic synthesis and protein engineering. Advances in both of these areas, combined with increased appreciation of the potential benefits of combining attractive features of both homogeneous catalysis and enzymatic catalysis, led to a resurgence of interest in ArMs starting in the early 2000's...
July 17, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28714140/prevascularization-of-natural-nanofibrous-extracellular-matrix-for-engineering-completely-biological-3d-prevascularized-tissues-for-diverse-applications
#5
Lijun Zhang, Zichen Qian, Mitchell Tahtinen, Shaohai Qi, Feng Zhao
Self-sustainability after implantation is one of the critical obstacles facing large engineered tissues. A preformed functional vascular network provides an effective solution for solving the mass transportation problem. With the support of mural cells, endothelial cells (ECs) can form microvessels within engineered tissues. As an important mural cell, human mesenchymal stem cells (hMSCs) not only stabilize the engineered microvessel network, but also preserve their multi-potency when grown under optimal culture conditions...
July 17, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28713299/effects-of-direct-instruction-and-strategy-modeling-on-upper-primary-students-writing-development
#6
Paula López, Mark Torrance, Gert Rijlaarsdam, Raquel Fidalgo
Strategy-focused instruction is one of the most effective approaches to improve writing skills. It aims to teach developing writers strategies that give them executive control over their writing processes. Programs under this kind of instruction tend to have multiple components that include direct instruction, modeling and scaffolded practice. This multi-component nature has two drawbacks: it makes implementation challenging due to the amount of time and training required to perform each stage, and it is difficult to determine the underlying mechanisms that contribute to its effectiveness...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28711855/exploiting-and-engineering-hemoproteins-for-abiological-carbene-and-nitrene-transfer-reactions
#7
REVIEW
Oliver F Brandenberg, Rudi Fasan, Frances H Arnold
The surge in reports of heme-dependent proteins as catalysts for abiotic, synthetically valuable carbene and nitrene transfer reactions dramatically illustrates the evolvability of the protein world and our nascent ability to exploit that for new enzyme chemistry. We highlight the latest additions to the hemoprotein-catalyzed reaction repertoire (including carbene Si-H and C-H insertions, Doyle-Kirmse reactions, aldehyde olefinations, azide-to-aldehyde conversions, and intermolecular nitrene C-H insertion) and show how different hemoprotein scaffolds offer varied reactivity and selectivity...
July 13, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28711017/alginate-gelatin-scaffolds-incorporated-with-silibinin-loaded-chitosan-nanoparticles-for-bone-formation-in-vitro
#8
R S Leena, M Vairamani, N Selvamurugan
Silibinin is a plant derived flavonolignan known for its multiple biological properties, but its role in the promotion of bone formation has not yet been well studied. Moreover, the delivery of Silibinin is hindered by its complex hydrophobic nature, which limits its bioavailability. Hence, in this study, we fabricated a drug delivery system using chitosan nanoparticles loaded with Silibinin at different concentrations (20μM, 50μM, and 100μM). They were then incorporated into scaffolds containing Alginate and Gelatin (Alg/Gel) for the sustained and prolonged release of Silibinin...
July 12, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28709399/draft-sequencing-and-assembly-of-the-genome-of-the-world-s-largest-fish-the-whale-shark-rhincodon-typus-smith-1828
#9
Timothy D Read, Robert A Petit, Sandeep J Joseph, Md Tauqeer Alam, M Ryan Weil, Maida Ahmad, Ravila Bhimani, Jocelyn S Vuong, Chad P Haase, D Harry Webb, Milton Tan, Alistair D M Dove
BACKGROUND: The whale shark (Rhincodon typus) has by far the largest body size of any elasmobranch (shark or ray) species. Therefore, it is also the largest extant species of the paraphyletic assemblage commonly referred to as fishes. As both a phenotypic extreme and a member of the group Chondrichthyes - the sister group to the remaining gnathostomes, which includes all tetrapods and therefore also humans - its genome is of substantial comparative interest. Whale sharks are also listed as an endangered species on the International Union for Conservation of Nature's Red List of threatened species and are of growing popularity as both a target of ecotourism and as a charismatic conservation ambassador for the pelagic ecosystem...
July 14, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28707624/three-dimensional-3d-culture-in-sarcoma-research-and-the-clinical-significance
#10
Songtao Gao, Jacson Shen, Francis Hornicek, Zhenfeng Duan
Sarcomas are rare malignant tumors that arise from transformed cells of mesenchymal origin. Despite the progress in diagnosis and treatment, sarcomas have a high mortality rate due to local recurrence, metastasis, and the development of drug resistance to chemotherapy. New models for sarcoma research are required to further understand the disease and to develop new therapies. In vitro sarcoma modeling is challenging because of significant genetic heterogeneities, diverse pathological, and overlapping clinical characteristics...
July 14, 2017: Biofabrication
https://www.readbyqxmd.com/read/28707422/description-of-d-glucosamine-immobilization-kinetics-onto-poly-lactic-acid-surface-via-a-multistep-physicochemical-approach-for-preparation-of-novel-active-biomaterials
#11
Ahmed E Swilem, Marian Lehocký, Petr Humpolíček, Zdenka Kucekova, Igor Novák, Matej Mičušík, Hassan A Abdel-Rehim, El-Sayed A Hegazy, Ashraf A Hamed, Jaroslav Kousal
Poly(lactic acid) (PLA) has shown much success in the preparation of tissue engineering scaffolds as it can be fabricated with a tailored architecture. However, the PLA surface has drawbacks including the lack of biofunctional motifs which are essential for high affinity to biological cells. Therefore, this study describes a multistep physicochemical approach for the immobilization of D-glucosamine (GlcN), a naturally occurring monosaccharide having many biological functions, on the PLA surface aiming at enhancing the cell proliferation activity...
July 13, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28703007/a-chaperonin-nanocaged-hemin-as-an-artificial-metalloenzyme-for-oxidation-catalysis
#12
Xiaoqiang Wang, Chao Wang, Meihong Pan, Junting Wei, Fuping Jiang, Rongsheng Lu, Xuan Liu, Yihui Huang, Fang Huang
Taking inspiration from biology's effectiveness in functionalizing protein-based nanocages for chemical processes, we describe here a rational design of an artificial metalloenzyme for oxidations with the bacterial chaperonin GroEL, a nanocage for protein folding in nature, by supramolecular anchoring of catalytically active hemin in its hydrophobic central cavity. The promiscuity of the chaperonin cavity is an essential element of this design, which can mimic the hydrophobic binding pocket in natural metalloenzymes to accept cofactor and substrate without requiring specific ligand-protein interactions...
July 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28702884/decellularization-of-large-tendon-specimens-combination-of-manually-performed-freeze-thaw-cycles-and-detergent-treatment
#13
Susanne Pauline Roth, Ina Erbe, Janina Burk
Reliable decellularization techniques applicable to tendon tissue play a critical role in the field of current tissue engineering. Particularly, an application as three-dimensional culture model for in vitro research and translational approaches to establish graft-based tendon repair as a routine clinical tool represent two main application fields for decellularized tendon scaffolds. Considering methodological issues of tendon decellularization, one of the major challenges lies in the preservation of the tendon-specific extracellular matrix (ECM) architecture to reflect natural tissue characteristic as best as possible...
July 13, 2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28702668/effects-of-counter-anions-p-substituents-and-solvents-on-optical-and-photophysical-properties-of-2-phenylbenzo-b-phospholium-salts
#14
Yoshinari Koyanagi, Shogo Kawaguchi, Kaori Fujii, Yoshifumi Kimura, Takahiro Sasamori, Norihiro Tokitoh, Yoshihiro Matano
In this work, we investigated the effects of counter anions, P-substituents, and solvents on the optical and photophysical properties of 2-phenylbenzo[b]phospholium salts in solution. A series of 2-phenylbenzo[b]phospholium salts was prepared by P-alkylation or P-phenylation of 1,2-diphenylbenzo[b]phosphole followed by anion exchange reactions. X-ray crystallographic analyses of six benzo[b]phospholium salts showed that each phosphorus center has an onium nature with an essentially tetrahedral geometry. (1)H NMR and steady-state UV-vis absorption and fluorescence spectroscopic measurements of these phospholium salts revealed the pivotal role of counter-anion solvation...
July 12, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28702648/modular-interior-loading-and-exterior-decoration-of-a-virus-like-particle
#15
Jhanvi Sharma, Masaki Uchida, Heini M Miettinen, Trevor Douglas
Virus-like particles (VLPs) derived from the bacteriophage P22 offer an interesting and malleable platform for encapsulation and multivalent presentation of cargo molecules. The packaging of cargo in P22 VLP is typically achieved through genetically enabled directed in vivo encapsulation. However, this approach does not allow control over the packing density and composition of the encapsulated cargos. Here, we have adopted an in vitro assembly approach to gain control over cargo packaging in P22. The packaging was controlled by closely regulating the stoichiometric ratio of cargo-fused-scaffold protein and wild-type scaffold protein during the in vitro assembly...
July 12, 2017: Nanoscale
https://www.readbyqxmd.com/read/28701957/an-overview-on-medicinal-chemistry-of-synthetic-and-natural-derivatives-of-cannabidiol
#16
REVIEW
Paula Morales, Patricia H Reggio, Nadine Jagerovic
Cannabidiol (CBD) has been traditionally used in Cannabis-based preparation, however historically, it has received far less interest as a single drug than the other components of Cannabis. Currently, CBD generates considerable interest due to its beneficial neuroprotective, antiepileptic, anxiolytic, antipsychotic, and anti-inflammatory properties. Therefore, the CBD scaffold becomes of increasing interest for medicinal chemists. This review provides an overview of the chemical structure of natural and synthetic CBD derivatives including the molecular targets associated with these compounds...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28701463/inverted-stereocontrol-of-iridoid-synthase-in-snapdragon
#17
Hajo Kries, Franziska Kellner, Mohamed Omar Kamileen, Sarah E O'Connor
The natural product class of iridoids, found in various species of flowering plants, harbors astonishing chemical complexity. The discovery of iridoid biosynthetic genes in the medicinal plant Catharanthus roseus has provided insight into the biosynthetic origins of this class of natural product. However, not all iridoids share the exact 5-6 bicyclic ring scaffold of the Catharanthus iridoids. For instance, iridoids in the ornamental flower snapdragon (Antirrhinum majus, Plantaginaceae family) are derived from the C7 epimer of this scaffold...
July 12, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28700665/solution-conformations-of-zika-ns2b-ns3pro-and-its-inhibition-by-natural-products-from-edible-plants
#18
Amrita Roy, Liangzhong Lim, Shagun Srivastava, Yimei Lu, Jianxing Song
The recent Zika viral (ZIKV) epidemic has been associated with severe neurological pathologies such as neonatal microcephaly and Guillain-Barre syndrome but unfortunately no vaccine or medication is effectively available yet. Zika NS2B-NS3pro is essential for the proteolysis of the viral polyprotein and thereby viral replication. Thus NS2B-NS3pro represents an attractive target for anti-Zika drug discovery/design. Here, we have characterized the solution conformations and catalytic parameters of both linked and unlinked Zika NS2B-NS3pro complexes and found that the unlinked complex manifested well-dispersed NMR spectra...
2017: PloS One
https://www.readbyqxmd.com/read/28699526/hydrogel-based-cell-therapies-for-kidney-regeneration-current-trends-in-biofabrication-and-in-vivo-repair
#19
Katja Jansen, Carl C L Schuurmans, Jitske Jansen, Rosalinde Masereeuw, Tina Vermonden
Facing the problems of limited renal regeneration capacity and the persistent shortage of donor kidneys, dialysis remains the only treatment option for many end-stage renal disease patients. Unfortunately, dialysis is only a medium-term solution because large and protein-bound uremic solutes are not efficiently cleared from the body and lead to disease progression over time. Current strategies for improved renal replacement therapies (RRTs) range from whole organ engineering to biofabrication of renal assist devices and biological injectables for in vivo regeneration...
July 10, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28697274/traceless-solid-phase-synthesis-of-fused-chiral-macrocycles-via-conformational-constraint-assisted-cyclic-iminium-formation
#20
Eva Schutznerova, Allen G Oliver, Greg Slough, Viktor Krchnak
Natural products comprising chiral molecular scaffolds containing fused medium-sized cycles and macrocycles represent an important and relevant pharmacological target for the discovery and development of new drugs. Here, we describe traceless solid-phase synthesis of acyclic intermediates amenable to cyclization to medium (11) and large (12) fused rings. The key aspect of the synthetic strategy is incorporation of a specific conformation constraint that facilitates cyclization in favor of 11- and 12-memered rings rather than possible 7-membered ones...
July 11, 2017: Chemistry: a European Journal
keyword
keyword
73824
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"