keyword
MENU ▼
Read by QxMD icon Read
search

Collagen crosslinking

keyword
https://www.readbyqxmd.com/read/28922717/magnetic-nanoparticle-loaded-alginate-beads-for-local-micro-actuation-of-in-vitro-tissue-constructs
#1
Awatef M Alshehri, Otto C Wilson, Bishnu Dahal, John Philip, Xiaolong Luo, Christopher B Raub
Magnetic nanoparticles (MNPs) self-align and transduce magnetic force, two properties which lead to promising applications in cell and tissue engineering. However, the toxicity of MNPs to cells which uptake them is a major impediment to applications in engineered tissue constructs. To address this problem, MNPs were embedded in millimeter-scale alginate beads, coated with glutaraldehyde cross-linked chitosan, and loaded in acellular and MDA-MB-231 cancer cell-seeded collagen hydrogels, providing local micro-actuation under an external magnetic field...
September 4, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28919526/chemical-crosslinking-of-biopolymeric-scaffolds-current-knowledge-and-future-directions-of-crosslinked-engineered-bone-scaffolds
#2
REVIEW
Ahmad Oryan, Amir Kamali, Ali Moshiri, Hossien Baharvand, Hamed Daemi
Bone tissue scaffolds made from either natural or synthetic polymers are employed to promote bone healing. However, lack of sufficient or poor mechanical properties such as low integrity and stability reduces their medical applications. Crosslinking, defined as induction of chemical or physical links among polymer chains, is a simple method generally used to modify mechanical, biological and degradation properties of hydrogels. Although crosslinking through chemical reactions improves the mechanical properties of bone substitutes, most of the reagents used for this aim demonstrate undesirable effects and may exert toxic reactions...
September 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28917911/injectable-glycosaminoglycan-protein-nano-complex-in-semi-interpenetrating-networks-a-biphasic-hydrogel-for-hyaline-cartilage-regeneration
#3
Janani Radhakrishnan, Anuradha Subramanian, Swaminathan Sethuraman
Articular hyaline cartilage regeneration remains challenging due to its less intrinsic reparability. The study develops injectable biphasic semi-interpenetrating polymer networks (SIPN) hydrogel impregnated with chondroitin sulfate (ChS) nanoparticles for functional cartilage restoration. ChS loaded zein nanoparticles (∼150nm) prepared by polyelectrolyte-protein complexation were interspersed into injectable SIPNs developed by blending alginate with poly(vinyl alcohol) and calcium crosslinking. The hydrogel exhibited interconnected porous microstructure (39...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28914807/development-optimization-and-in-vitro-in-vivo-characterization-of-collagen-dextran-spongious-wound-dressings-loaded-with-flufenamic-acid
#4
Mihaela Violeta Ghica, Mădălina Georgiana Albu Kaya, Cristina-Elena Dinu-Pîrvu, Dumitru Lupuleasa, Denisa Ioana Udeanu
The aim of this study was the development and optimization of some topical collagen-dextran sponges with flufenamic acid, designed to be potential dressings for burn wounds healing. The sponges were obtained by lyophilization of hydrogels based on type I fibrillar collagen gel extracted from calf hide, dextran and flufenamic acid, crosslinked and un-crosslinked, and designed according to a 3-factor, 3-level Box-Behnken experimental design. The sponges showed good fluid uptake ability quantified by a high swelling ratio...
September 15, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28914595/evaluation-of-gingival-crevicular-fluid-and-peri-implant-sulcus-fluid-levels-of-periostin-a-preliminary-report
#5
Abdullah C Akman, Sezen Buyukozdemir Askin, Guliz N Guncu, Rahime M Nohutcu
BACKGROUND: Periostin, a protein present in the alveolar bone and periodontal ligament, related to response to external forces. The aims of this study are; to detect the levels of periostin in peri-implant sulcular fluid (PISF) and gingival crevicular fluid (GCF), and to evaluate the relationship between periostin, ICTP (Pyridinoline cross-linked carboxyterminal telopeptide of type 1 collagen) and CTX (C-terminal crosslinked telopeptide of type 1 collagen) levels and clinical inflammatory symptoms and duration of functional loading...
September 15, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28902430/reduced-serum-igf-1-associated-with-hepatic-osteodystrophy-is-a-main-determinant-of-low-cortical-but-not-trabecular-bone-mass
#6
Zhongbo Liu, Tianzhen Han, Haim Werner, Clifford J Rosen, Mitchell B Schaffler, Shoshana Yakar
Hepatic osteodystrophy is multifactorial in its pathogenesis. Numerous studies have shown that impairments of the hepatic growth hormone/insulin-like growth factor-1 axis (GH/IGF-1) are common in patients with non-alcoholic fatty liver disease, chronic viral hepatitis, liver cirrhosis, and chronic cholestatic liver disease. Moreover these conditions are also associated with low bone mineral density (BMD) and greater fracture risk, particularly in cortical bone sites. Hence, we addressed whether disruptions in the GH/IGF-1 axis were causally related to the low bone mass in states of chronic liver disease using a mouse model of liver-specific GH-receptor (GHR) gene deletion (Li-GHRKO)...
September 13, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28899816/enzyme-crosslinked-gene-activated-matrix-for-the-induction-of-mesenchymal-stem-cells-in-osteochondral-tissue-regeneration
#7
Yi-Hsuan Lee, Hsi-Chin Wu, Chia-Wei Yeh, Chen-Hsiang Kuan, Han-Tsung Liao, Horng-Chaung Hsu, Jui-Che Tsai, Jui-Sheng Sun, Tzu-Wei Wang
The development of osteochondral tissue engineering is an important issue for the treatment of traumatic injury or aging associated joint disease. However, the different compositions and mechanical properties of cartilage and subchondral bone show the complexity of this tissue interface, making it challenging for the design and fabrication of osteochondral graft substitute. In this study, a bilayer scaffold is developed to promote the regeneration of osteochondral tissue within a single integrated construct...
September 9, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28894402/attachment-proliferation-and-morphological-properties-of-human-dermal-fibroblasts-on-ovine-tendon-collagen-scaffolds-a-comparative-study
#8
Fauzi Mh Busra, Yogeswaran Lokanathan, Masrina Mohd Nadzir, Aminuddin Saim, Ruszymah Bt Hj Idrus, Shiplu Roy Chowdhury
INTRODUCTION: Collagen type I is widely used as a biomaterial for tissue-engineered substitutes. This study aimed to fabricate different three-dimensional (3D) scaffolds using ovine tendon collagen type I (OTC-I), and compare the attachment, proliferation and morphological features of human dermal fibroblasts (HDF) on the scaffolds. METHODS: This study was conducted between the years 2014 to 2016 at the Tissue Engineering Centre, UKM Medical Centre. OTC-I was extracted from ovine tendon, and fabricated into 3D scaffolds in the form of sponge, hydrogel and film...
March 2017: Malaysian Journal of Medical Sciences: MJMS
https://www.readbyqxmd.com/read/28892611/upconversion-nanoparticles-hyaluronate-rose-bengal-conjugate-complex-for-noninvasive-photochemical-tissue-bonding
#9
Seulgi Han, Byung Woo Hwang, Eun Young Jeon, Dooyup Jung, Geon Hui Lee, Do Hee Keum, Ki Su Kim, Seok Hyun Yun, Hyung Joon Cha, Sei Kwang Hahn
The recent progress in photonic nanomaterials has contributed greatly to the development of photomedicines. However, the finite depth of light penetration is still a serious limitation, constraining their clinical applications. Here, we developed a poly(allylamine) (PAAm)-modified upconversion nanoparticle/hyaluronate-rose bengal (UCNP/PAAm/HA-RB) conjugate complex for photochemical bonding of deep tissue with near-infrared (NIR) light illumination. Compared to the conventional invasive treatment via suturing and stapling, the UCNP/PAAm/HA-RB conjugate complex could be noninvasively delivered into the deep tissue and accelerate the tissue bonding upon NIR light illumination...
September 15, 2017: ACS Nano
https://www.readbyqxmd.com/read/28888665/fish-scale-derived-collagen-patch-promotes-growth-of-blood-and-lymphatic-vessels-in-vivo
#10
Jun Kit Wang, Kim Pin Yeo, Yong Yao Chun, Timothy Thatt Yang Tan, Nguan Soon Tan, Véronique Angeli, Cleo Choong
In this study, Type I collagen was extracted from fish scales as a potential alternative source of collagen for tissue engineering applications. Since unmodified collagen typically has poor mechanical and degradation stability both in vitro and in vivo, additional methylation modification and 1,4-butanediol diglycidyl ether (BDE) crosslinking steps were used to improve the physicochemical properties of fish scale-derived collagen. Subsequently, in vivo studies using a murine model demonstrated the biocompatibility of the different fish scale-derived collagen patches...
September 6, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28887577/periostin-and-its-interacting-proteins-in-the-construction-of-extracellular-architectures
#11
REVIEW
Isao Kii, Harumi Ito
Periostin is a matricellular protein that is composed of a multi-domain structure with an amino-terminal EMI domain, a tandem repeat of four FAS 1 domains, and a carboxyl-terminal domain. These distinct domains have been demonstrated to bind to many proteins including extracellular matrix proteins (Collagen type I and V, fibronectin, tenascin, and laminin), matricellular proteins (CCN3 and βig-h3), and enzymes that catalyze covalent crosslinking between extracellular matrix proteins (lysyl oxidase and BMP-1)...
September 8, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28879494/regeneration-of-sciatic-nerve-crush-injury-by-a-hydroxyapatite-nanoparticle-containing-collagen-type-i-hydrogel
#12
Majid Salehi, Mahdi Naseri-Nosar, Somayeh Ebrahimi-Barough, Mohammdreza Nourani, Ahmad Vaez, Saeed Farzamfar, Jafar Ai
The current study aimed to enhance the efficacy of peripheral nerve regeneration using a hydroxyapatite nanoparticle-containing collagen type I hydrogel. A solution of type I collagen, extracted from the rat tails, was incorporated with hydroxyapatite nanoparticles (with the average diameter of ~212 nm) and crosslinked with 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC) to prepare the hydrogel. The Schwann cell cultivation on the prepared hydrogel demonstrated a significantly higher cell proliferation than the tissue culture plate, as positive control, after 48 h (n = 3, P < 0...
September 6, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28878327/accelerated-healing-of-diabetic-wounds-treated-with-l-glutamic-acid-loaded-hydrogels-through-enhanced-collagen-deposition-and-angiogenesis-an-in-vivo-study
#13
Ponrasu Thangavel, Balaji Ramachandran, Sudip Chakraborty, Ramya Kannan, Suguna Lonchin, Vignesh Muthuvijayan
We have developed L-glutamic acid (LG) loaded chitosan (CS) hydrogels to treat diabetic wounds. Although literature reports wound healing effects of poly(glutamic acid)-based materials, there are no studies on the potential of L-glutamic acid in treating diabetic wounds. As LG is a direct precursor for proline synthesis, which is crucial for collagen synthesis, we have prepared CS + LG hydrogels to accelerate diabetic wound healing. Physiochemical properties of the CS + LG hydrogels showed good swelling, thermal stability, smooth surface morphology, and controlled biodegradation...
September 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28877394/her2-breast-cancer-cells-undergo-apoptosis-upon-exposure-to-tannic-acid-released-from-remodeled-crosslinked-collagen-type-i
#14
Lauren G Jordan, Brian W Booth
Tannic acid (TA) is a naturally occurring polyphenol that crosslinks collagen type I and possesses anti-cancer potential. In previous studies, we demonstrated the increased sensitivity of estrogen receptor-positive (ER(+) ) breast cancer cells to TA as opposed to triple negative breast cancer cells and normal human breast epithelial cells. In the current study, human pre-adipocytes and HER2+ breast cancer cells were grown on TA-crosslinked collagen type I beads. Cell attachment, growth, and proliferation of the cells result in remodeling of the collagen matrix and release of the crosslinking TA...
September 6, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28875112/bilateral-corneal-perforation-due-to-mrsa-keratitis-in-a-crosslinking-patient
#15
Zackery Oakey, Kevin Thai, Sumit Garg
Introduction: The cornea may become infected and perforated after epithelium-on collagen crosslinking. Case presentation: A healthy 33-year-old male who underwent corneal collagen crosslinking in both eyes developed a purulent keratitis and bilateral corneal perforations, requiring bilateral penetrating keratoplasties. He was exposed to methicillin resistant staphylococcus aureus (MRSA) by a family member with a tracheostomy and was treated with MRSA-directed antibiotics. After prolonged recovery and treatment of his infection, he had acceptable but limited uncorrected visual acuity, with excellent corrected visual acuity...
2017: GMS Ophthalmology Cases
https://www.readbyqxmd.com/read/28869704/eliminating-glutaraldehyde-from-crosslinked-collagen-films-using-supercritical-co2
#16
Dominic M Casali, Michael J Yost, Michael A Matthews
Collagen has received considerable attention as a biomaterial for tissue engineering because of its low immunogenicity, controllable biodegradation, and ability to influence cell growth and proliferation. Frequently, collagen scaffolds require crosslinking to improve mechanical strength, requiring agents like glutaraldehyde that have high residual cytotoxicity. A novel method for extracting residual glutaraldehyde from crosslinked collagen films with supercritical carbon dioxide (CO2 ) is presented. CO2 is a non-toxic, non-flammable substance that is relatively inert and can be used to process biomaterials at mild pressures and physiologic temperatures...
September 4, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28864775/proteolytic-processing-of-lysyl-oxidase-like-2-in-the-extracellular-matrix-is-required-for-crosslinking-of-basement-membrane-collagen-iv
#17
Alberto J Lopez-Jimenez, Trayambak Basak, Roberto M Vanacore
Lysyl oxidase like 2 (LOXL2) is an enzyme secreted into the extracellular matrix that crosslinks collagens by mediating oxidative deamination of lysine residues. Our previous work demonstrated that this enzyme crosslinks the 7S domain, a structural domain that stabilizes collagen IV scaffolds in the basement membrane. In spite of its relevant role in extracellular matrix biosynthesis, little is known about the structural requirements of LOXL2 that enable collagen IV crosslinking. In this study, we demonstrate that LOXL2 is processed extracellularly by serine proteases, generating a 65 kDa form lacking the first two Scavenger Receptors Cysteine Rich domains...
September 1, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28864253/engineered-potato-virus-x-nanoparticles-support-hydroxyapatite-nucleation-for-improved-bone-tissue-replacement
#18
Ines Lauria, Christina Dickmeis, Juliane Röder, Malin Beckers, Stephan Rütten, Ying Ying Lin, Ulrich Commandeur, Horst Fischer
Bionanoparticles based on filamentous phages or flexuous viruses are interesting candidates for meeting the challenges of tailoring biomineralization in hydrogel-based bone tissue substitutes. We hypothesized that hydroxyapatite crystal nucleation and matrix mineralization can be significantly increased by mineralization-inducing (MIP) and integrin binding motif (RGD) peptides presented on biomimetic nanoparticles. In this study, Potato virus X (PVX), a flexible rod-shaped plant virus was genetically engineered to present these functional peptides on its particle surface...
August 29, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28861284/alveolar-socket-preservation-with-demineralised-bovine-bone-mineral-and-a-collagen-matrix
#19
Carlo Maiorana, Pier Paolo Poli, Matteo Deflorian, Tiziano Testori, Federico Mandelli, Heiner Nagursky, Raffaele Vinci
PURPOSE: The aim of the present study was to evaluate the healing of post-extraction sockets following alveolar ridge preservation clinically, radiologically, and histologically. METHODS: Overall, 7 extraction sockets in 7 patients were grafted with demineralised bovine bone mineral and covered with a porcine-derived non-crosslinked collagen matrix (CM). Soft tissue healing was clinically evaluated on the basis of a specific healing index. Horizontal and vertical ridge dimensional changes were assessed clinically and radiographically at baseline and 6 months after implant placement...
August 2017: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/28852785/management-of-oral-bisphosphonates-treatment-by-rheumatologists-and-determinants-of-therapeutic-changes-a-case-vignette-based-study
#20
C Roux, G Baron, K Briot, B Roux, B Cortet, T Thomas
Using case vignette methodology, this study shows that only 4% of patients are maintained on oral bisphosphonates over 5 years, and prescribers switch or stop the treatment in 20-30% of cases at each visit. There are few determinants of these changes. More information on appropriate follow-up could help in patients' management. INTRODUCTION: Persistence to oral bisphosphonates, the most commonly prescribed anti-osteoporotic treatments, is low. The aim of this study was to evaluate the role of rheumatologists on the treatment patterns, and to assess the determinants of treatment changes...
August 29, 2017: Osteoporosis International
keyword
keyword
21852
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"