keyword
MENU ▼
Read by QxMD icon Read
search

crosslink

keyword
https://www.readbyqxmd.com/read/29346275/a-review-on-recent-advances-in-stabilizing-peptides-proteins-upon-fabrication-in-hydrogels-from-biodegradable-polymers
#1
REVIEW
Faisal Raza, Hajra Zafar, Ying Zhu, Yuan Ren, Aftab -Ullah, Asif Ullah Khan, Xinyi He, Han Han, Md Aquib, Kofi Oti Boakye-Yiadom, Liang Ge
Hydrogels evolved as an outstanding carrier material for local and controlled drug delivery that tend to overcome the shortcomings of old conventional dosage forms for small drugs (NSAIDS) and large peptides and proteins. The aqueous swellable and crosslinked polymeric network structure of hydrogels is composed of various natural, synthetic and semisynthetic biodegradable polymers. Hydrogels have remarkable properties of functionality, reversibility, sterilizability, and biocompatibility. All these dynamic properties of hydrogels have increased the interest in their use as a carrier for peptides and proteins to be released slowly in a sustained manner...
January 18, 2018: Pharmaceutics
https://www.readbyqxmd.com/read/29345898/engineered-phage-matrix-stiffness-modulating-osteogenic-differentiation
#2
Hee-Sook Lee, Jeong-In Kang, Woo-Jae Chung, Do Hoon Lee, Byung Yang Lee, Seung-Wuk Lee, So Young Yoo
Herein, we demonstrate an engineered phage mediated matrix for osteogenic differentiation with controlled stiffness by crosslinking the engineered phage displaying RGD and HPQ with various concentrations of streptavidin or polymer, PDDA. Osteogenic gene expressions showed that they were specifically increased when MC3T3 cells were cultured on the stiffer phage matrix than softer one. Our phage matrices can be easily functionalized using chemical/genetic engineering and used as a stem cell tissue matrix stiffness platform for modulating differential cell expansion and differentiation...
January 18, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29345705/contact-mechanics-for-polydimethylsiloxane-from-liquid-to-solid
#3
L Dorogin, B N J Persson
Adhesion between a glass ball and a polydimethylsiloxane (PDMS) sample is dependent on the PDMS cross-link density, and the transformation of the material from the uncrosslinked liquid state to the fully crosslinked solid state is investigated in this study. The physical picture reflected a gradual transition from capillary forces driven contact mechanics to the classical Johnson-Kendall-Roberts (JKR)-type contact mechanics. PDMS was produced by mixing the base fluid and a cross-linker at a ratio of 10 : 1 and allowed to slowly cross-link at room temperature with simultaneous measurement of the ball-PDMS interaction force...
January 18, 2018: Soft Matter
https://www.readbyqxmd.com/read/29344891/stochastic-and-deterministic-models-for-the-metastatic-emission-process-formalisms-and-crosslinks
#4
Christophe Gomez, Niklas Hartung
Although the detection of metastases radically changes prognosis of and treatment decisions for a cancer patient, clinically undetectable micrometastases hamper a consistent classification into localized or metastatic disease. This chapter discusses mathematical modeling efforts that could help to estimate the metastatic risk in such a situation. We focus on two approaches: (1) a stochastic framework describing metastatic emission events at random times, formalized via Poisson processes, and (2) a deterministic framework describing the micrometastatic state through a size-structured density function in a partial differential equation model...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29344582/factor-xiii-in-plasma-but-not-in-platelets-mediates-red-blood-cell-retention-in-clots-and-venous-thrombus-size-in-mice
#5
Sravya Kattula, James R Byrnes, Sara M Martin, Lori A Holle, Brian C Cooley, Matthew J Flick, Alisa S Wolberg
The transglutaminase factor XIII (FXIII) stabilizes clots against mechanical and biochemical disruption and is essential for hemostasis. In vitro and in vivo models of venous thrombosis demonstrate that FXIII mediates clot size by promoting red blood cell (RBC) retention. However, the key source of FXIII and whether FXIII activity can be reduced to suppress thrombosis without imposing deleterious hemostatic consequences are 2 critical unresolved questions. FXIII is present in multiple compartments, including plasma (FXIIIplasma) as a heterotetramer of A2 and B2 subunits and platelets (FXIIIplt) as an A2 homodimer...
January 9, 2018: Blood Advances
https://www.readbyqxmd.com/read/29342321/contributions-of-material-properties-and-structure-to-increased-bone-fragility-for-a-given-bone-mass-in-the-ucd-t2dm-rat-model-of-type-2-diabetes
#6
Claire Acevedo, Meghan Sylvia, Eric Schaible, James L Graham, Kimber L Stanhope, Lionel N Metz, Bernd Gludovatz, Ann V Schwartz, Robert O Ritchie, Tamara N Alliston, Peter J Havel, Aaron J Fields
Adults with type 2 diabetes (T2D) have a higher fracture risk for a given bone quantity, but the mechanisms remain unclear. Using a rat model of polygenic obese T2D, we demonstrate that diabetes significantly reduces whole-bone strength for a given bone mass (micro-CT-derived BMC), and we quantify the roles of T2D-induced deficits in material properties versus bone structure, i.e., geometry and microarchitecture. Lumbar vertebrae and ulnae were harvested from 6-month-old lean Sprague-Dawley rats, obese Sprague-Dawley rats, and diabetic obese UCD-T2DM rats (diabetic for 69 ± 7 days; blood glucose >200 mg/dl)...
January 17, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29342139/structure-and-mutagenesis-reveal-essential-capsid-protein-interactions-for-kshv-replication
#7
Xinghong Dai, Danyang Gong, Hanyoung Lim, Jonathan Jih, Ting-Ting Wu, Ren Sun, Z Hong Zhou
Kaposi's sarcoma-associated herpesvirus (KSHV) causes Kaposi's sarcoma, a cancer that commonly affects patients with AIDS and which is endemic in sub-Saharan Africa. The KSHV capsid is highly pressurized by its double-stranded DNA genome, as are the capsids of the eight other human herpesviruses. Capsid assembly and genome packaging of herpesviruses are prone to interruption and can therefore be targeted for the structure-guided development of antiviral agents. However, herpesvirus capsids-comprising nearly 3,000 proteins and over 1,300 Å in diameter-present a formidable challenge to atomic structure determination and functional mapping of molecular interactions...
January 17, 2018: Nature
https://www.readbyqxmd.com/read/29341933/the-effects-of-platelet-lysate-patches-on-the-activity-of-tendon-derived-cells
#8
Raquel Costa-Almeida, Albina R Franco, Tamagno Pesqueira, Mariana B Oliveira, Pedro S Babo, Isabel B Leonor, João F Mano, Rui L Reis, Manuela E Gomes
Platelet-derived biomaterials are widely explored as cost-effective sources of therapeutic factors, holding a strong potential for endogenous regenerative medicine. Particularly for tendon repair, treatment approaches that shift the injury environment are explored to accelerate tendon regeneration. Herein, genipin-crosslinked platelet lysate (PL) patches are proposed for the delivery of human-derived therapeutic factors in patch augmentation strategies aiming at tendon repair. Developed PL patches exhibited a controlled release profile of PL proteins, including bFGF and PDGF-BB...
January 13, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29341492/development-of-a-bi-modal-in-situ-crosslinking-method-to-achieve-multi-factor-release-from-electrospun-gelatin
#9
Alysha P Kishan, Taneidra Walker, Nick Sears, Thomas Wilems, Elizabeth M Cosgriff-Hernandez
To better mimic native tissue microenvironments, current efforts have moved beyond single growth factor delivery to more complex multiple growth factor delivery with distinct release profiles. Electrospun gelatin, a widely investigated drug delivery vehicle, requires post-processing crosslinking techniques that generate a mesh with uniform crosslinking density, limiting the ability to deliver multiple factors at different rates. Herein, we describe a method to independently control release of multiple factors from a single electrospun gelatin mesh...
January 17, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29341319/crosslinking-of-semiaromatic-polyesters-toward-high-temperature-shape-memory-polymers-with-full-recovery
#10
Thomas Raidt, Martin Schmidt, Joerg C Tiller, Frank Katzenberg
In this work, high-temperature shape memory polymers are realized by end-group crosslinking of the semiaromatic polyesters polyethylene terephthalate as well as polybutylene terephthalate. Both networks exhibit trigger temperatures distinctly higher than 200 °C and excellent shape memory properties such as storable strains of 200%, full fixity of the applied strain in the temporary shape, and full recovery of the permanent shape.
January 17, 2018: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/29339978/increase-of-somatic-cell-mutations-in-oxidative-damage-sensitive-drosophila
#11
Ryota Koike, Tomoyo Uchiyama, Sakae Arimoto-Kobayashi, Keinosuke Okamoto, Tomoe Negishi
Background: Oxidative damage is an important genotoxic source for almost all organisms. To efficiently detect mutations induced by oxidative damage, we previously developed a urate-null Drosophila strain. Using this Drosophila strain, we showed the mutagenic activity of environmental cigarette smoke (ECS) and the herbicide paraquat, which are known to produce reactive oxygen species (ROS). In the present study, we examined the mutagenic activities of carcinogenic mutagens that are considered to cause mutations by adduct formation, alkylation, or crosslinking of cellular DNA in the oxidative damage-sensitive Drosophila to evaluate how the oxidative damage induced by these mutagens is involved in causing mutations...
2018: Genes and Environment: the Official Journal of the Japanese Environmental Mutagen Society
https://www.readbyqxmd.com/read/29339972/evaluation-of-green-tea-extract-as-a-safe-personal-hygiene-against-viral-infections
#12
Yun Ha Lee, Yo Han Jang, Young-Seok Kim, Jinku Kim, Baik Lin Seong
Background: Viral infections often pose tremendous public health concerns as well as economic burdens. Despite the availability of vaccines or antiviral drugs, personal hygiene is considered as effective means as the first-hand measure against viral infections. The green tea catechins, in particular, epigallocatechin-3-gallate (EGCG), are known to exert potent antiviral activity. In this study, we evaluated the green tea extract as a safe personal hygiene against viral infections. Results: Using the influenza virus A/Puerto Rico/8/34 (H1N1) as a model, we examined the duration of the viral inactivating activity of green tea extract (GTE) under prolonged storage at various temperature conditions...
2018: Journal of Biological Engineering
https://www.readbyqxmd.com/read/29339637/corneal-collagen-crosslinking-combined-with-phototherapeutic-keratectomy-and-photorefractive-keratectomy-for-corneal-ectasia-after-laser-in-situ-keratomileusis
#13
Wei Zhu, Yunfei Han, Changxia Cui, Wenwen Xu, Xuan Wang, Xiaoxiao Dou, Linlin Xu, Yanyun Xu, Guoying Mu
PURPOSE: The aim of this study was to analyze the effects of corneal crosslinking (CXL) combined with phototherapeutic keratectomy (PTK) and photorefractive keratectomy (PRK) in halting the progression and improving the visual function of corneal ectasia after laser in situ keratomileusis (LASIK). METHODS: PTK-PRK-CXL was performed on 14 eyes of 14 patients who developed corneal ectasia after LASIK. The visual acuity, spherical refraction and cylinder, corneal topography indices, thinnest corneal thickness (TCT), and endothelial cell count were evaluated at baseline and at 1, 3, 6, and 12 months postoperatively...
January 17, 2018: Ophthalmic Research
https://www.readbyqxmd.com/read/29339285/facile-synthesis-and-rheological-characterization-of-nanocomposite-hyaluronan-organoclay-hydrogels
#14
J Mourycová, K K R Datta, A Procházková, M Plotěná, V Enev, J Smilek, J Másílko, M Pekař
We report a facile methodology for the synthesis of inorganic-organic hydrogels based on integrative assembly aminopropyl magnesium phyllosilicate (aminoclay) and sodium salt of hyaluronic acid. The viscoelastic materials produced by electrostatic interactions and crosslinking of hyaluronan in the presence of exfoliated synthetic organoclay results in the formation of gel-like behavior retaining a high amount of water. This was confirmed by a rheological study revealing significant dominance of the elastic response over the entire deformation frequency range used...
January 12, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29339283/hydroxyethyl-cellulose-hydrogel-for-wound-dressing-fabrication-characterization-and-in-vitro-evaluation
#15
Gomaa F El Fawal, Marwa M Abu-Serie, Mohamed A Hassan, Mohamed S Elnouby
In this study, new hydrogel membranes were developed based on hydroxyethyl cellulose (HEC) supplemented with tungsten oxide for further implementing in wound treatment. HEC hydrogel membranes were fabricated and crosslinked using citric acid (CA). Various tests were carried out including FTIR, XRD, porosity measurements, swelling, mechanical properties, gel fraction, and thermal gravimetric analysis to evaluate the efficiency of the prepared membranes as wound dressing material. In addition, wound healing activity of the examined membranes for human dermal fibroblast cell line was investigated employing in vitro scratching model...
January 12, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29336146/coordination-triggered-hierarchical-folate-zinc-supramolecular-hydrogels-leading-to-printable-biomaterials
#16
Kaerdun Liu, Shihao Zang, Rongrong Xue, Jinghui Yang, Lizhi Wang, Jianbin Huang, Yun Yan
Printable hydrogels desired in bioengineering have extremely high demands on biocompatibility and mechanic strength, which can hardly be achieved in conventional hydrogels made with biopolymers. Here we show that on employment of the strategy of coordination triggered hierarchical self-assembly of naturally occurred small molecule folic acid, supramolecular hydrogels with robust mechanical elastic modulus comparable to synthetic double network (DN) polymer gels can be made at concentrations below 1 %. A sequence of hierarchical steps are involved in the formation of this extraordinary hydrogel: petrin rings on folate form tetramers through hydrogen bonding, tetramers stack into nanofibers by π-π stacking, zinc ions cross-link the nanofibers into larger scale fibrils, and further crosslink the fibril network to gel water...
January 16, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29335424/functionalisation-of-detonation-nanodiamond-for-monodispersed-soluble-dna-nanodiamond-conjugates-using-mixed-silane-bead-assisted-sonication-disintegration
#17
Robert Edgington, Katelyn M Spillane, George Papageorgiou, William Wray, Hitoshi Ishiwata, Mariana Labarca, Sergio Leal-Ortiz, Gordon Reid, Martin Webb, John Foord, Nicholas Melosh, Andreas T Schaefer
Nanodiamonds have many attractive properties that make them suitable for a range of biological applications, but their practical use has been limited because nanodiamond conjugates tend to aggregate in solution during or after functionalisation. Here we demonstrate the production of DNA-detonation nanodiamond (DNA-DND) conjugates with high dispersion and solubility using an ultrasonic, mixed-silanization chemistry protocol based on the in situ Bead-Assisted Sonication Disintegration (BASD) silanization method...
January 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29335104/vision-related-quality-of-life-and-dependency-in-french-keratoconus-patients-impact-study
#18
Valentine Saunier, Audrey-Elodie Mercier, Thibaut Gaboriau, Florence Malet, Joseph Colin, Pierre Fournié, François Malecaze, David Touboul
PURPOSE: To assess the quality of life in French keratoconus patients. SETTING: Fifty-seven Keratoconus National Reference Centers across France. DESIGN: Prospective case series. METHODS: Patients completed the National Eye Institute Visual Functioning Questionnaire-25 (NEI VFQ-25) and a French validated questionnaire on disability and dependency from February to June 2012 when they came for an ophthalmic examination at 57 participating centers across France...
December 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/29334773/macf1-overexpression-by-transfecting-the-21-kbp-large-plasmid-pegfp-c1a-acf7-promotes-osteoblast-differentiation-and-bone-formation
#19
Yan Zhang, Chong Yin, Lifang Hu, Zhihao Chen, Fan Zhao, Dijie Li, Jianhua Ma, Xiaoli Ma, Peihong Su, Wuxia Qiu, Chaofei Yang, Pai Wang, Siyu Li, Ge Zhang, Liping Wang, Airong Qian, Cory Xian
Microtubule actin crosslinking factor 1 (MACF1) is a large spectraplakin protein known to have crucial roles in regulating cytoskeletal dynamics, cell migration, growth and differentiation. However, its role and action mechanism in bone remain unclear. This study investigated the optimal conditions for effective transfection of the large plasmid PEGFP-C1A-ACF7 (~21 kbp) containing the full-length human MACF1 cDNA and the potential role of MACF1 in bone formation. To enhance MACF1 expression, the large plasmid was transfected into osteogenic cells by electroporation in vitro and mouse calvaria with nanoparticles...
January 15, 2018: Human Gene Therapy
https://www.readbyqxmd.com/read/29334737/tubular-hybrids-a-nanoparticle-molecular-network
#20
Priyadarshi Ranjan, Sreejith Shankar, Ronit Popovitz-Biro, Sidney R Cohen, Iddo Pinkas, Reshef Tenne, Michal Lahav, Milko E van der Boom
We report here a new methodology for the formation of free-standing nanotubes composed of individual gold nanoparticles crosslinked by coordination complexes or porphyrin molecules using WS2 nanotubes (INT-WS2) as a template. Our method consists of three steps: (i) the coverage of these robust inorganic materials with monodispersed and dense monolayers of gold nanoparticles, (ii) formation of a molecular-AuNP network by exposing these decorated tubes to solutions containing a ruthenium polypyridyl complex or meso-tetra(4-pyridyl)porphyrin, (iii) removal of the INT-WS2 template with a hydrogen peroxide (H2O2) solution...
January 16, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
keyword
keyword
36416
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"