keyword
MENU ▼
Read by QxMD icon Read
search

Collagen crosslinking

keyword
https://www.readbyqxmd.com/read/28532097/influence-of-telopeptides-on-the-structural-and-physical-properties-of-polymeric-and-monomeric-acid-soluble-type-i-collagen
#1
Róisín Holmes, Steve Kirk, Giuseppe Tronci, Xuebin Yang, David Wood
Currently two factors hinder the use of collagen as building block of regenerative devices: the limited mechanical strength in aqueous environment, and potential antigenicity. Polymeric collagen is naturally found in the cross-linked state and is mechanically tougher than the monomeric, acid-soluble collagen ex vivo. The antigenicity of collagen, on the other hand, is mainly ascribed to inter-species variations in amino acid sequences of the non-helical terminal telopeptides. These telopeptides can be removed through enzymatic treatment to produce atelocollagen, although the effect of this cleavage on triple helix organization, amino acidic composition and thermal properties is often disregarded...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28532070/ribose-mediated-crosslinking-of-collagen-hydroxyapatite-hybrid-scaffolds-for-bone-tissue-regeneration-using-biomimetic-strategies
#2
Gopal Shankar Krishnakumar, Natalia Gostynska, Elisabetta Campodoni, Massimiliano Dapporto, Monica Montesi, Silvia Panseri, Anna Tampieri, Elizaveta Kon, Maurilio Marcacci, Simone Sprio, Monica Sandri
This study explores for the first time the application of ribose as a highly biocompatible agent for the crosslinking of hybrid mineralized constructs, obtained by bio-inspired mineralization of self-assembling Type I collagen matrix with magnesium-doped-hydroxyapatite nanophase, towards a biomimetic mineralized 3D scaffolds (MgHA/Coll) with excellent compositional and structural mimicry of bone tissue. To this aim, two different crosslinking mechanisms in terms of pre-ribose glycation (before freeze drying) and post-ribose glycation (after freeze drying) were investigated...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28532022/a-novel-grapheme-oxide-modified-collagen-chitosan-bio-film-for-controlled-growth-factor-release-in-wound-healing-applications
#3
Ting Liu, Weihua Dan, Nianhua Dan, Xinhua Liu, Xuexu Liu, Xu Peng
Collagen-chitosan composite film modified with grapheme oxide (GO) and 1-(3-Dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC), termed CC-G-E film, was loaded with basic fibroblast growth factor (bFGF) as the development of an efficacious wound healing device. In this study we report a novel drug delivery system that prevents the initial burst release and loss of bioactivity of drugs in vitro and in vivo applications. The results showed that CC-G-E film possessed improved thermal stability and a higher rate of crosslinking with increased mechanical properties when the dosage of GO was between 0...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28522220/surgical-reconstruction-of-ruptured-anterior-cruciate-ligament-prolongs-trauma-induced-increase-of-inflammatory-cytokines-in-synovial-fluid-an-exploratory-analysis-in-the-kanon-trial
#4
Staffan Larsson, André Struglics, L Stefan Lohmander, Richard Frobell
OBJECTIVE: Prospectively monitor how treatment of acutely ruptured anterior cruciate ligament (ACL) affects biomarkers of inflammation and proteolytic degradation over five years. DESIGN: We studied 119 subjects with acute ACL injury from the randomized controlled KANON-trial (Clinical trial ISRCTN 84752559) who had synovial fluid, serum and urine samples available from at least two out of six visits over five years after acute ACL rupture. All subjects followed a similar rehabilitation protocol where, according to randomization, 60 also had early ACL reconstruction and 59 had the option to undergo a delayed ACL reconstruction if needed...
May 15, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28499945/dsc-investigation-of-bovine-hide-collagen-at-varying-degrees-of-crosslinking-and-humidities
#5
Michaela Schroepfer, Michael Meyer
Bovine hide collagen (nonCLC; non-CrossLinked Collagen) was analysed by differential scanning calorimetry (DSC) at different hydration degrees and compared with hide collagen samples crosslinked with glutaraldehyde (CLC-GA) and chromium(III) ions (CLC-Cr), respectively. Crosslinking and drying were confirmed to increase the denaturation temperature. Different regions were assigned, that reflect the variation of the influence of water on the denaturation temperature. Furthermore, at moderate hydration degrees, the enthalpies of non-crosslinked collagen increase compared to the fully hydrated state...
May 10, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28495149/united-states-multicenter-clinical-trial-of-corneal-collagen-crosslinking-for-keratoconus-treatment
#6
Peter S Hersh, R Doyle Stulting, David Muller, Daniel S Durrie, Rajesh K Rajpal
PURPOSE: To evaluate the safety and efficacy of corneal collagen crosslinking (CXL) for the treatment of progressive keratoconus. DESIGN: Prospective, randomized, multicenter, controlled clinical trial. PARTICIPANTS: Patients with progressive keratoconus (n = 205). METHODS: The treatment group underwent standard CXL and the sham control group received riboflavin alone without removal of the epithelium. MAIN OUTCOME MEASURES: The primary efficacy criterion was the change over 1 year of topography-derived maximum keratometry value, comparing treatment with control group...
May 7, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28482483/fabrication-of-user-friendly-and-biomimetic-1-1-carbonyldiimidazole-cross-linked-gelatin-agar-microfluidic-devices
#7
Simonne Jocic, Gemma Mestres, Maria Tenje
We have developed a straightforward technique for fabricating user-friendly and biomimetic microfluidic devices out of a gelatin/agar gel cross-linked with 1,1'-carbonyldiimidazole. The fabrication procedure requires only inexpensive starting materials such as glass capillaries and wires to mold 3D cylindrical channels into the gel with the possibility of achieving channel diameters of 375μm and 1000μm. We demonstrate that the channel absent of gel injury can retain fluid within its dimensions for at least 7h...
July 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28477073/-riboflavin-uva-crosslinking-in-progressive-keratoconus
#8
P Maier, T Reinhard
In patients with keratoconus, a progressive, ectatic disease of the cornea, the shape of the cornea is continuously changing leading to a reduction in visual acuity by progressive myopia and more and more (irregular) astigmatism. The symptomatic treatment consists of the prescription of glasses or special gas-permeable rigid contact lenses. Corneal tomography is generally used for diagnosis. After initial diagnosis of keratoconus, regular tomographic follow-ups should be performed. If clinically significant progression is found and confirmed by repeated measurements, riboflavin UVA collagen crosslinking should be offered to the patients...
May 5, 2017: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
https://www.readbyqxmd.com/read/28470657/-morphologic-corneal-changes-after-crosslinking-for-keratoconus
#9
P L Müller, K U Löffler, M Kohlhaas, F G Holz, M C Herwig-Carl
Keratoconus is a relatively common (1 : 2000) bilateral disease leading to a change in biochemical and biomechanical corneal structure as well as thinning and ectasia. For more than 10 years, crosslinking has been a therapeutic option in cases of progression. Using riboflavin and UVA-radiation, the anterior corneal stroma (300 µm) gets stiffened by crosslinking of collagen fibers. When protocols and limitations are adhered, the procedure is described to be effective and of low-risk. This review gives an overview about physiologic and pathologic changes in keratoconic corneas before and after crosslinking...
May 3, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28466896/non-sticky-and-antimicrobial-zwitterionic-nanocomposite-dressings-for-infected-chronic-wounds
#10
Kang-Ting Huang, Yun-Lung Fang, Pai-Shan Hsieh, Chun-Chang Li, Niann-Tzyy Dai, Chun-Jen Huang
Zwitterionic poly(sulfobetaine acrylamide) (pSBAA)-based nanocomposite hydrogels impregnated with germicidal silver nanoparticles (AgNPs) were synthesized and implemented for the treatment of infected chronic wounds. The zwitterionic hydrogels exhibited excellent non-sticky properties and had reinforced mechanical properties by the addition of hectorite nanoclay and poly(ethylene glycol)dimethacrylate as physical and chemical crosslinkers, respectively. In addition, AgNPs were grown within the intercalated clay/polymer structure by in situ free radical reduction, as confirmed by UV-vis spectroscopy and transmission electron microscopy (TEM)...
May 3, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28463641/exogenous-mir-29b-delivery-via-a-hyaluronan-based-injectable-system-yields-functional-maintenance-of-the-infarcted-myocardium
#11
Michael Monaghan, Monika Holeiter, Eva Brauchle, Shannon Layland, Yan Lu, Arjun Deb, Abhay Pandit, Ali Nsair, Katja Schenke-Layland
Myocardial infarction results in debilitating remodeling of the myocardial extracellular matrix. In this proof-of-principle study it was sought to modulate this aggressive remodeling by injecting a hyaluronic acid-based reservoir delivering exogenous microRNA-29B (miR-29B). This proof-of-principal study was executed whereby myocardial ischemia/reperfusion was performed on C57BL/6 mice for 45 minutes after which five 10 µl boluses of a hydrogel composed of thiolated hyaluronic acid crosslinked with poly (ethylene glycol) diacrylate, containing exogenous miR-29B as an active therapy, were injected into the borderzone of the infarcted myocardium...
May 2, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28461739/efficacy-of-transepithelial-corneal-collagen-crosslinking-for-keratoconus-12-month-follow-up
#12
Mohamed A Heikal, Tarek Tawfik Soliman, Ayser Fayed, Abdelmonem M Hamed
PURPOSE: To evaluate the efficacy of transepithelial corneal collagen crosslinking (TE-CXL) in patients with progressive keratoconus. PATIENTS AND METHODS: This is a prospective interventional consecutive study carried out on 30 eyes of 18 patients with progressive keratoconus who underwent TE-CLX using both ParaCel™ (riboflavin 0.25%, hydroxy propyl methyl cellulose, NaCl, ethylenediaminetetraacetic acid [EDTA], Tris, and benzalkonium chloride) and vibeX-Xtra (riboflavin 0...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28453913/bioprinting-of-biomimetic-skin-containing-melanocytes
#13
Daejin Min, Wonhye Lee, Il-Hong Bae, Tae Ryong Lee, Phillip Croce, Seung-Schik Yoo
This study reports a three-dimensional (3D) bioprinting technique that is capable of producing a full-thickness skin model containing pigmentation. Multiple layers of fibroblasts (FB)-containing collagen hydrogel precursor were printed and crosslinked through neutralization using sodium bicarbonate, constituting the dermal layer. Melanocytes (MC) and keratinocytes (KC) were sequentially printed on top of the dermal layer to induce skin pigmentation upon subsequent air-liquid interface culture. Histological analysis was performed not only to confirm the formation of distinct skin layers, but also to identify the presence of pigmentation...
April 28, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/28447989/fabrication-of-extracellular-matrix-derived-foams-and-microcarriers-as-tissue-specific-cell-culture-and-delivery-platforms
#14
Anna Kornmuller, Cody F C Brown, Claire Yu, Lauren E Flynn
Cell function is mediated by interactions with the extracellular matrix (ECM), which has complex tissue-specific composition and architecture. The focus of this article is on the methods for fabricating ECM-derived porous foams and microcarriers for use as biologically-relevant substrates in advanced 3D in vitro cell culture models or as pro-regenerative scaffolds and cell delivery systems for tissue engineering and regenerative medicine. Using decellularized tissues or purified insoluble collagen as a starting material, the techniques can be applied to synthesize a broad array of tissue-specific bioscaffolds with customizable geometries...
April 11, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28445728/blocking-surgically-induced-lysyl-oxidase-activity-reduces-the-risk-of-lung-metastases
#15
Chen Rachman-Tzemah, Shelly Zaffryar-Eilot, Moran Grossman, Dario Ribero, Michael Timaner, Joni M Mäki, Johanna Myllyharju, Francesco Bertolini, Dov Hershkovitz, Irit Sagi, Peleg Hasson, Yuval Shaked
Surgery remains the most successful curative treatment for cancer. However, some patients with early-stage disease who undergo surgery eventually succumb to distant metastasis. Here, we show that in response to surgery, the lungs become more vulnerable to metastasis due to extracellular matrix remodeling. Mice that undergo surgery or that are preconditioned with plasma from donor mice that underwent surgery succumb to lung metastases earlier than controls. Increased lysyl oxidase (LOX) activity and expression, fibrillary collagen crosslinking, and focal adhesion signaling contribute to this effect, with the hypoxic surgical site serving as the source of LOX...
April 25, 2017: Cell Reports
https://www.readbyqxmd.com/read/28441880/a-three-dimensional-collagen-fiber-network-model-of-the-extracellular-matrix-for-the-simulation-of-the-mechanical-behaviors-and-micro-structures
#16
Shoubin Dong, Zetao Huang, Liqun Tang, Xiaoyang Zhang, Yongrou Zhang, Yi Jiang
The extracellular matrix (ECM) provides structural and biochemical support to cells and tissues, which is a critical factor for modulating cell dynamic behavior and intercellular communication. In order to further understand the mechanisms of the interactive relationship between cell and the ECM, we developed a three-dimensional (3D) collagen-fiber network model to simulate the micro structure and mechanical behaviors of the ECM and studied the stress-strain relationship as well as the deformation of the ECM under tension...
April 26, 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28439061/-calcium-and-bone-metabolism-across-women-s-life-stages-bone-quality-and-treatment-of-osteoporosis-by-serm
#17
Mitsuru Saito, Keishi Marumo
Estrogen deficiency induces bone resorption and bone collagen crosslink abnormalities such as reductions in enzymatic cross-links and accumulation of Advanced glycation end products(AGEs). In this review, we described that the mechanism of poor bone quality in estrogen deficiency and how selective estrogen receptor modulators such as raloxifene and bazedoxifene improve bone structural and material properties.
2017: Clinical Calcium
https://www.readbyqxmd.com/read/28437178/a-novel-injectable-recombinant-collagen-i-peptide-based-macroporous-microcarrier-allows-superior-expansion-of-c2c12-and-human-bone-marrow-derived-mesenchymal-stromal-cells-and-supports-deposition-of-mineralized-matrix
#18
Davide Confalonieri, Margherita La Marca, Elisabeth Marianna Wilhelmina Maria van Dongen, Heike Walles, Franziska Ehlicke
The development of scaffold formulations based on extracellular matrix-inspired synthetic materials constitutes an important resource for the advance of cell-based therapies in bone tissue engineering approaches, where both cell and scaffold implantation are often needed. Culturing cells on porous microcarriers (MCs) allows cell expansion in a three-dimensional microenvironment and constitutes a possible solution for minimally invasive cell and scaffold simultaneous delivery, but the reduced pore dimension and pore interconnection diameter of several commercially available microcarriers limits de facto cell ingrowth, and ultimately their suitability for in vivo cell delivery...
March 3, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28430702/re-tear-function-and-ocular-surface-alterations-after-accelerated-corneal-collagen-crosslinking-in-progressive-keratoconus
#19
Emine Kalkan Akcay, Betul Seher Uysal
No abstract text is available yet for this article.
May 2017: Eye & Contact Lens
https://www.readbyqxmd.com/read/28430701/tear-function-and-ocular-surface-alterations-after-accelerated-corneal-collagen-crosslinking-in-progressive-keratoconus
#20
Zisis Gatzioufas, Mohamed Elalfy, Samer Hamada, Damian Lake
No abstract text is available yet for this article.
May 2017: Eye & Contact Lens
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"