keyword
MENU ▼
Read by QxMD icon Read
search

Cross-linking

keyword
https://www.readbyqxmd.com/read/29793074/cross-linked-electrospun-cartilage-acellular-matrix-poly-caprolactone-co-lactide-co-glycolide-nanofiber-as-an-antiadhesive-barrier
#1
Jin Woo Lee, Joon Yeong Park, Seung Hun Park, Min Ju Kim, Bo Ram Song, Hee-Woong Yun, Tae Woong Kang, Hak Soo Choi, Young Jick Kim, Byoung Hyun Min, Moon Suk Kim
In this work, we chose cartilage acellular matrix (CAM) as a promising antiadhesive material because CAM effectively inhibits the formation of blood vessels, and we used electrospinning to prepare antiadhesive barriers. Additionally, we synthesized N-hydroxysuccinimide (NHS)-poly(caprolactone-co-lactide-co-glycolide)-NHS (MP) copolymers (to tune degradation) as a cross-linking agent for CAM. This is the first report on the development of electrospun cross-linked (Cx) CAM/MP (CA/P) nanofiber (NF) (Cx-CA/P-NF) with a tunable degradation period as an antiadhesive barrier...
May 21, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29792945/cross-linking-by-epichlorohydrin-and-diepoxybutane-correlates-with-cytotoxicity-and-leads-to-apoptosis-in-human-leukemia-hl-60-cells
#2
Phuong M Le, Vanesa L Silvestri, Samuel C Redstone, Jordanne B Dunn, Julie T Millard
The bifunctional alkylating agents epichlorohydrin (ECH) and diepoxybutane (DEB) have been linked to increased cancer risks in industrial workers. These compounds react with DNA and proteins, leading to genotoxic effects. We used the comet assay to monitor formation of cross-links in HL-60 cells treated with ECH, DEB, and the structurally related anti-cancer drug mechlorethamine (HN2). We report a time- and dose-dependent cytotoxicity that correlated with cross-linking activity, following the order HN2 > DEB > ECH...
May 21, 2018: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/29792801/developing-a-novel-sulfoxide-containing-ms-cleavable-homobifunctional-cysteine-reactive-cross-linker-for-studying-protein-protein-interactions
#3
Craig B Gutierrez, Sarah A Block, Clinton Yu, Stephanie M Soohoo, Alexander S Huszagh, Scott D Rychnovsky, Lan Huang
Cross-linking mass spectrometry (XL-MS) has become an emerging technology for defining protein-protein interactions (PPIs) and elucidating architectures of large protein complexes. Up to now, the mostly widely used cross-linking reagents are targeting lysines. While such reagents have been successfully applied to map PPIs at the proteome-wide scale, comprehensive PPI profiling would require additional cross-linking chemistries. Cysteine is one of the most reactive amino acids and an attractive target for cross-linking owing to its unique role in protein structures...
May 24, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29791784/chitosan-hydrogels-and-bionanocomposites-formed-through-the-mineralization-and-regulated-charging
#4
REVIEW
Irina Postnova, Vladimir Silant'ev, Sergei Sarin, Yury Shchipunov
The account presents survey of our systematic studies on chitosan. Only this polysaccharide bears cationic charges, possesses antimicrobial activity and wound healing ability that make it highly appropriate for using in medicine, biomedical engineering, cosmetics, food, packaging. However, its application meets with severe limitation. Chitosan belongs to polysaccharides that do not jellify solutions. Main approaches are based on the chemical modifications and cross-linking, but these treatments impairs therewith the biocompatibility and biological activity of chitosan...
May 23, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29790054/removal-of-cobalt-and-lead-ions-from-wastewater-samples-using-an-insoluble-nanosponge-biopolymer-composite-adsorption-isotherm-kinetic-thermodynamic-and-regeneration-studies
#5
Anny Leudjo Taka, Elvis Fosso-Kankeu, Kriveshini Pillay, Xavier Yangkou Mbianda
In this study, an insoluble nanosponge biopolymer composite was synthesized, using a combined process of amidation reaction, cross-linking polymerization, and sol-gel method to obtain a phosphorylated multiwalled carbon nanotube-cyclodextrin/silver-doped titania (pMWCNT-βCD/TiO2 -Ag). This work mainly emphasized on the removal of lead (Pb2+ ) and cobalt (Co2+ ) metal ions from synthetic and real wastewater samples using the synthesized pMWCNT-βCD/TiO2 -Ag as a biosorbent. The new material was characterized by Fourier transform infrared (FTIR) spectroscopy, zeta potential, Brunauer-Emmett-Teller (BET) method, and scanning electron microscopy (SEM)...
May 23, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29788478/a-minimal-threshold-of-fancj-helicase-activity-is-required-for-its-response-to-replication-stress-or-double-strand-break-repair
#6
Sanjay Kumar Bharti, Joshua A Sommers, Sanket Awate, Marina A Bellani, Irfan Khan, Lynda Bradley, Graeme A King, Yeonee Seol, Venkatasubramanian Vidhyasagar, Yuliang Wu, Takuye Abe, Koji Kobayashi, Kazuo Shin-Ya, Hiroyuki Kitao, Marc S Wold, Dana Branzei, Keir C Neuman, Robert M Brosh
Fanconi Anemia (FA) is characterized by bone marrow failure, congenital abnormalities, and cancer. Of over 20 FA-linked genes, FANCJ uniquely encodes a DNA helicase and mutations are also associated with breast and ovarian cancer. fancj-/- cells are sensitive to DNA interstrand cross-linking (ICL) and replication fork stalling drugs. We delineated the molecular defects of two FA patient-derived FANCJ helicase domain mutations. FANCJ-R707C was compromised in dimerization and helicase processivity, whereas DNA unwinding by FANCJ-H396D was barely detectable...
May 21, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/29788290/bagel4-a-user-friendly-web-server-to-thoroughly-mine-ripps-and-bacteriocins
#7
Auke J van Heel, Anne de Jong, Chunxu Song, Jakob H Viel, Jan Kok, Oscar P Kuipers
Interest in secondary metabolites such as RiPPs (ribosomally synthesized and posttranslationally modified peptides) is increasing worldwide. To facilitate the research in this field we have updated our mining web server. BAGEL4 is faster than its predecessor and is now fully independent from ORF-calling. Gene clusters of interest are discovered using the core-peptide database and/or through HMM motifs that are present in associated context genes. The databases used for mining have been updated and extended with literature references and links to UniProt and NCBI...
May 21, 2018: Nucleic Acids Research
https://www.readbyqxmd.com/read/29787337/multiple-functions-of-lysyl-oxidase-like-2-in-oral-fibroproliferative-processes
#8
D Saxena, F Mahjour, A D Findlay, E A Mously, A Kantarci, P C Trackman
Gingival overgrowth is a side effect of certain medications, including calcium channel blockers, cyclosporin A, and phenytoin. Phenytoin-induced gingival overgrowth is fibrotic. Lysyl oxidases are extracellular enzymes that are required for biosynthetic cross-linking of collagens, and members of this enzyme family are upregulated in fibrosis. Previous studies in humans and in a mouse model of phenytoin-induced gingival overgrowth have shown that LOXL2 is elevated in the epithelium and connective tissue in gingival overgrowth tissues and not in normal tissues...
May 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29787246/investigation-of-solvent-hydron-exchange-in-the-reaction-catalyzed-by-the-antibiotic-resistance-protein-cfr
#9
Matthew R Bauerle, Tyler L Grove, Squire J Booker
Cfr is a radical S-adenosylmethionine (RS) methylase that appends methyl groups to C8 and C2 of adenosine 2503 in 23S ribosomal RNA. Methylation of C8 confers resistance to several classes of antibiotics that bind in or near the peptidyl transferase center of the bacterial ribosome, including the synthetic antibiotic linezolid. The Cfr reaction requires the action of five conserved cysteines, three of which ligate a required [4Fe-4S] cluster cofactor. The two remaining cysteines play a more intricate role in the reaction, one of which (Cys338) becoming transiently methylated during catalysis...
May 22, 2018: Biochemistry
https://www.readbyqxmd.com/read/29785119/clinical-relevance-of-lysyl-oxidase-like-2-and-functional-mechanisms-in-glioma
#10
Xiao-Guang Du, Mei-Jia Zhu
Introduction: Glioma is the most frequent malignancy of the adult central nervous system with high recurrence risk and poor prognosis. Understanding the biological molecular mechanisms involved in glioma progression is critical for studying oncogenic mechanisms and improving prognosis. Lysyl oxidase-like 2 (LOXL2) is a kind of lysyl oxidase catalyzing the formation of peptidyl-lysine residues and promoting intramolecular cross-linking, especially for proteins in extracellular matrix. Our study explored the expression pattern of LOXL2 in glioma for the first time and found that its high expression was associated with larger tumor size and advanced tumor grade ( P <0...
2018: OncoTargets and Therapy
https://www.readbyqxmd.com/read/29785021/advanced-septa-size-quantitation-determines-the-evaluation-of-histological-fibrosis-outcome-in-chronic-hepatitis-b-patients
#11
Bingqiong Wang, Yameng Sun, Jialing Zhou, Xiaoning Wu, Shuyan Chen, Shanshan Wu, Hui Liu, Tailing Wang, Xiaojuan Ou, Jidong Jia, Hong You
Hepatitis B (HBV)-related fibrosis can be reversed after effective antiviral therapy. However, detailed changes of collagen characteristics during fibrosis regression remain unclear. Paired biopsy samples obtained from chronic hepatitis B patients were imaged with second harmonic generation/two photon excitation fluorescence (SHG/TPEF)-based microscopy to identify and quantify collagen features in portal, septal, and fibrillar areas. According to the changes of Ishak stage and qFibrosis score, a total of 117 patients with paired liver biopsy appeared to have four different outcomes after 78-week antiviral therapy: fast reverse (9%), reverse (63%), stable (15%), or progress (13%) on fibrosis...
May 21, 2018: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/29784815/virb8-homolog-trae-from-plasmid-pkm101-forms-a-hexameric-ring-structure-and-interacts-with-the-virb6-homolog-trad
#12
Bastien Casu, Charline Mary, Aleksandr Sverzhinsky, Aurélien Fouillen, Antonio Nanci, Christian Baron
Type IV secretion systems (T4SSs) are multiprotein assemblies that translocate macromolecules across the cell envelope of bacteria. X-ray crystallographic and electron microscopy (EM) analyses have increasingly provided structural information on individual T4SS components and on the entire complex. As of now, relatively little information has been available on the exact localization of the inner membrane-bound T4SS components, notably the mostly periplasmic VirB8 protein and the very hydrophobic VirB6 protein...
May 21, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29784777/structure-of-an-eiic-sugar-transporter-trapped-in-an-inward-facing-conformation
#13
Zhenning Ren, Jumin Lee, Mahdi Muhammad Moosa, Yin Nian, Liya Hu, Zhichun Xu, Jason G McCoy, Allan Chris M Ferreon, Wonpil Im, Ming Zhou
The phosphoenolpyruvate-dependent phosphotransferase system (PTS) transports sugar into bacteria and phosphorylates the sugar for metabolic consumption. The PTS is important for the survival of bacteria and thus a potential target for antibiotics, but its mechanism of sugar uptake and phosphorylation remains unclear. The PTS is composed of multiple proteins, and the membrane-embedded Enzyme IIC (EIIC) component transports sugars across the membrane. Crystal structures of two members of the glucose superfamily of EIICs, bcChbC and bcMalT, were solved in the inward-facing and outward-facing conformations, and the structures suggest that sugar translocation could be achieved by movement of a structured domain that contains the sugar-binding site...
May 21, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29783108/a-new-perspective-to-aberrations-caused-by-barium-and-vanadium-ions-on-lens-culinaris-medik
#14
Murat Çanlı
This study investigates aberrations caused by barium and vanadium on meristematic cells of Lens culinaris Medik. Barium and vanadium ions at various concentrations (0.05 M, 0.1 M, 0.25 M, 0.5 M, and 1.0 M) were exposed to the seeds of the plant at fixed time interval (12 h). After seedlings, with a microscopic examination images were captured about the root tips. Those images showed that several abnormalities occurred on the plant such as chromosome breakings, chromosome dispersion, bridge chromosome, chromosome adherence, ring chromosome...
May 18, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29783080/development-and-characterization-of-a-field-effect-biosensor-for-the-detection-of-acetoin
#15
Denise Molinnus, Lukas Muschallik, Laura Osorio Gonzalez, Johannes Bongaerts, Torsten Wagner, Thorsten Selmer, Petra Siegert, Michael Keusgen, Michael J Schöning
A capacitive electrolyte-insulator-semiconductor (EIS) field-effect biosensor for acetoin detection has been presented for the first time. The EIS sensor consists of a layer structure of Al/p-Si/SiO2 /Ta2 O5 /enzyme acetoin reductase. The enzyme, also referred to as butane-2,3-diol dehydrogenase from B. clausii DSM 8716T , has been recently characterized. The enzyme catalyzes the (R)-specific reduction of racemic acetoin to (R,R)- and meso-butane-2,3-diol, respectively. Two different enzyme immobilization strategies (cross-linking by using glutaraldehyde and adsorption) have been studied...
May 18, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29781976/posterior-scleral-contraction-to-treat-recurrent-or-persistent-macular-detachment-after-previous-vitrectomy-in-highly-myopic-eyes
#16
Linyan Zheng, Anpeng Pan, Shuangqian Zhu, Yue Wu, Liang Dong, Anquan Xue
PURPOSE: To determine the efficacy of posterior scleral contraction (PSC) to treat recurrent or persistent macular detachment after previous vitrectomy in highly myopic eyes. METHODS: We reviewed the medical records of patients with high myopia and recurrent or persistent macular detachment after previous vitrectomy treated with PSC at our hospital between April 2013 and March 2017. Fourteen eyes (14 patients; mean age, 58.93 ± 11.08 years) were included. Sclera cross-linked with genipin was used for PSC...
May 16, 2018: Retina
https://www.readbyqxmd.com/read/29781019/complex-strain-induced-structural-changes-observed-in-fibrin-assembled-in-human-plasma
#17
G Portale, J Torbet
The structure of the core scaffold of blood clots, the interlinked 3-dimensional network of fibrin fibers, is modified by mechanical forces generated by platelet driven clot retraction, wound repair and shear stress through blood flow. Here X-ray diffraction is used to investigate how uniaxial strain, ε (ε = extension/original length), alters fiber structure in highly aligned human plasma clots covalently cross-linked by Factor XIIIa. Three stretch sensitive axially repeating structures are identified. Firstly, the foundation structure with an initial ≈22 nm axial repeat stretches, fades then disappears at ε ≈ 0...
May 21, 2018: Nanoscale
https://www.readbyqxmd.com/read/29780142/diabetes-mellitus-induced-bone-fragility
#18
Ippei Kanazawa, Toshitsugu Sugimoto
Accumulating evidence has shown that the risk of osteoporotic fractures is increased in patients with diabetes mellitus (DM). Thus, DM-induced bone fragility has been recently recognized as a diabetic complication. Because the fracture risk is independent of the reduction in bone mineral density, deterioration of the bone quality may be the main cause of bone fragility. Although its mechanism remains poorly understood, accumulated collagen cross-links of advanced glycation end-products (AGEs) and dysfunctions of osteoblast and osteocyte may be involved...
May 18, 2018: Internal Medicine
https://www.readbyqxmd.com/read/29779652/the-enzymology-of-prochlorosin-biosynthesis
#19
Silvia C Bobeica, Wilfred A van der Donk
Lanthipeptides are ribosomally synthesized and posttranslationally modified peptides containing thioether cross-links formed through addition of a cysteine to a dehydroalanine (to form lanthionine) or to a dehydrobutyrine (to form 3-methyllanthionine). Genome sequencing of marine cyanobacteria lead to the discovery of 1.6 million open reading frames encoding lanthipeptides. In many cases, a genome encodes a single lanthipeptide synthetase, but a large number of substrates. The enzymatic modification process in Prochlorococcus MIT9313 has been reconstituted in vitro, and a variety of experimental approaches have been used to try and understand how one enzyme is capable of modifying 30 different substrates...
2018: Methods in Enzymology
https://www.readbyqxmd.com/read/29777805/design-of-carboxymethyl-chitosan-based-heparin-mimicking-cross-linked-beads-for-safe-and-efficient-blood-purification
#20
Yilin Wang, Xuelian Huang, Chao He, YuPei Li, Weifeng Zhao, Changsheng Zhao
Safe and efficient carboxymethyl chitosan (CMC)-based heparin-mimicking cross-linked beads (CMC/PAMPS) as adsorbents for the clearance of low-density lipoprotein-cholesterol (LDL-c) in blood purification were prepared through hydrogen bonding interactions followed with in situ cross-linking with 2-acrylamido-2-methyl-1-propanesulfonicacid (AMPS). Fourier transform infrared spectra (FTIR), two-dimensional correlation FTIR spectroscopy (2D IR), thermal gravimetric analysis (TGA) and energy dispersive X-ray spectrometer (EDS) demonstrated the successful synthesis of CMC/PAMPS beads...
May 16, 2018: International Journal of Biological Macromolecules
keyword
keyword
43087
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"