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Collagen Cross-linking

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https://www.readbyqxmd.com/read/28721004/epithelium-on-photorefractive-intrastromal-cross-linking-pixl-for-reduction-of-low-myopia
#1
Wee Kiak Lim, Zhi Da Soh, Harold Kah Yen Choi, Julian Thiam Siew Theng
PURPOSE: To report the 9-12-month outcomes of a novel procedure for reduction of low myopia through epithelium-on photorefractive intrastromal cross-linking (PiXL) with customized control of topographic distribution of ultraviolet (UV)-fluence. METHOD: Myopic patients with normal (non-ectatic) corneas underwent the PiXL procedure for reduction of low myopia. PiXL treatments were delivered through selective application of UVA light based on the refractive error of each patient...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28719551/annulus-fibrosus-repair-using-high-density-collagen-gel-an-in-vivo-ovine-model
#2
Brenton Pennicooke, Ibrahim Hussain, Connor Berlin, Stephen R Sloan, Brandon Borde, Yu Moriguchi, Gernot Lang, Rodrigo Navarro-Ramirez, Jonathan Cheetham, Lawrence J Bonassar, Roger Härtl
STUDY DESIGN: Ovine in vivo study. OBJECTIVE: To perform lateral approach lumbar surgery in an ovine model to administer an injectable riboflavin (RF) cross-linked high-density collagen (HDC) gel and to assess its ability to mitigate intervertebral disc (IVD) degeneration after induced annulus fibrosus (AF) injury. SUMMARY OF BACKGROUND DATA: Biological-based injectable gels have shown efficacy in restoring biomechanical, radiographic, and histological parameters in IVD-injured animal models...
July 17, 2017: Spine
https://www.readbyqxmd.com/read/28715887/pectin-lyase-modified-red-ginseng-extract-exhibits-potent-anti-glycation-effects-in-vitro-and-in-vivo
#3
Chan-Sik Kim, Kyuhyung Jo, Mi-Kyung Pyo, Jin Sook Kim, Junghyun Kim
PURPOSE: GS-E3D is a newly developed pectin lyase-modified red ginseng extract. The purpose of this study was to evaluate the inhibitory effects of GS-E3D against advanced glycation end products. METHODS: In this study, we evaluated the inhibitory effects of GS-E3D on the formation of advanced glycation end products (AGEs) and their cross-linking with collagen in vitro and in streptozotocin-induced diabetic rats. RESULTS: An in vitro assay for the glycation of bovine serum albumin by methylglyoxal showed that GS-E3D inhibited AGE formation at an IC50 value of 19...
June 30, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/28715881/comparison-of-bone-metabolism-based-on-the-different-ages-and-competition-levels-of-junior-and-high-school-female-rhythmic-gymnasts
#4
Taewoong Oh, Tatsuki Naka
PURPOSE: This study was to clarify the effect of age and competition level by measuring bone metabolism markers and bone mineral density measurements of junior high school and high school female rhythmic gymnasts, who restrict their diets to maintain a low body weight, while routinely undertaking long hours of high-intensity exercise, comparing the gymnasts based on their elite/non-elite. METHODS: The study investigated 7 junior high school and 12 high school female rhythmic gymnasts...
June 30, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/28712639/reduction-in-fracture-resistance-of-the-root-with%C3%A2-aging
#5
Weishi Yan, Carolina Montoya, Marit Øilo, Alex Ossa, Avina Paranjpe, Hai Zhang, Dwayne Arola
INTRODUCTION: The incidence of vertical root fracture in endodontically treated teeth increases with patient age. This study evaluated the microstructure, chemical composition, and mechanical properties of radicular dentin as a function of aging. METHODS: Single-rooted teeth were obtained from adult donors ranging from age 15 to older than 80 years. Beams were extracted from the middle third of the root and subjected to 4-point flexure to failure to evaluate strength of dentin in terms of donor age...
July 13, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28704317/comparison-of-collagen-cross-linking-and-amniotic-membrane-transplantation-in-an-experimental-alkali-burn-rabbit-model
#6
Sevgi Subasi, Ozgul Altintas, Melda Yardimoglu, Yusufhan Yazir, Suleyman Karaman, Selenay Furat Rencber, Kubra Kavram
PURPOSE: To compare the effects of collagen cross-linking (CXL) and amniotic membrane transplantation (AMT) on acute corneal alkali burns. METHODS: After establishment of an alkali burn model, 32 rabbits were divided into 4 groups: control group, AMT group, CXL group, and AMT + CXL (combined) group. Clinical parameters, including epithelial wound, opacity, ulceration, and neovascularization, were evaluated on postinjury days 1, 7, 14, and 18. Histological parameters were examined in hematoxylin/eosin (H&E) and Masson trichrome-stained corneal sections...
July 11, 2017: Cornea
https://www.readbyqxmd.com/read/28702968/in-vitro-evaluation-of-collagen-production-on-human-fibroblasts-treated-with-hyaluronic-acid-peg-cross-linked-with-micromolecules-of-calcium-hydroxyapatite-in-low-concentration
#7
N Zerbinati, R Rauso, P Gonzalez, M Cherubino, E D'Este, A Calligaro, S Sommatis, C Maccario, R Mocchi
Neauvia Stimulate® is a biocompatible, injectable hyaluronic acid (HA) filler (26 mg/ml) PEG cross-linked with 1% of calcium hydroxyapatite (CaHA) for facial soft-tissue augmentation that provides volume to tissues, followed by a process of neocollagenesis for improving skin quality. The aim of the present study is to evaluate the possible modulation of collagen synthesis after treating human fibroblasts cultured in vitro with the product (Lot. 160517-26-1/2 PEG). The experimental model proposed, despite being an in vitro system, allows the derivation of useful information to predict the possible activity of the product in further in vivo application...
July 13, 2017: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28698571/injectable-hybrid-system-for-strontium-local-delivery-promotes-bone-regeneration-in-a-rat-critical-sized-defect-model
#8
Ana Henriques Lourenço, Nuno Neves, Cláudia Ribeiro-Machado, Susana R Sousa, Meriem Lamghari, Cristina C Barrias, Abel Trigo Cabral, Mário A Barbosa, Cristina C Ribeiro
Strontium (Sr) has been described as having beneficial influence in bone strength and architecture. However, negative systemic effects have been reported on oral administration of Sr ranelate, leading to strict restrictions in clinical application. We hypothesized that local delivery of Sr improves osteogenesis without eliciting detrimental side effects. Therefore, the in vivo response to an injectable Sr-hybrid system composed of RGD-alginate hydrogel cross-linked in situ with Sr and reinforced with Sr-doped hydroxyapatite microspheres, was investigated...
July 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28698228/perturbations-to-lysyl-oxidase-expression-broadly-influence-the-transcriptome-of-lung-fibroblasts
#9
Ivana Mižíková, Francesco Palumbo, Tamás Tábi, Susanne Herold, István Vadász, Konstantin Mayer, Werner Seeger, Rory E Morty
Lysyl oxidases are credited with pathogenic roles in lung diseases, including cancer, fibrosis, pulmonary hypertension, congenital diaphragmatic hernia, and bronchopulmonary dysplasia (BPD). Lysyl oxidases facilitate the covalent intra- and inter-molecular cross-linking of collagen and elastin fibers, thereby imparting tensile strength to the extracellular matrix (ECM). Alternative ECM-independent roles have recently been proposed for lysyl oxidases, including regulation of growth factor signaling, chromatin remodeling, and transcriptional regulation; all of which impact cell phenotype...
July 10, 2017: Physiological Genomics
https://www.readbyqxmd.com/read/28696707/cyclophilin-b-deficiency-causes-abnormal-dentin-collagen-matrix
#10
Masahiko Terajima, Yuki Taga, Wayne A Cabral, Masako Nagasawa, Noriko Sumida, Shunji Hattori, Joan C Marini, Mitsuo Yamauchi
Cyclophilin B (CypB) is an endoplasmic reticulum-resident protein that regulates collagen folding, and also contributes to prolyl 3-hydroxylation (P3H) and lysine (Lys) hydroxylation of collagen. In this study, we characterized dentin type I collagen in CypB null (KO) mice, a model of recessive osteogenesis imperfecta type IX, and compared to those of wild-type (WT) and heterozygous (Het) mice. Mass spectrometric analysis demonstrated that the extent of P3H in KO collagen was significantly diminished compared to WT/Het...
July 11, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28695800/application-of-recombinant-collagen-type-%C3%A2-combined-with-polyaspartic-acid-in-biomimetic-biomineralization
#11
Zhan Zhang, Chun Zhang, Qiaofeng Guo, Gouping Ma, Lifeng Shen, Huajun Yu, Bingyuan Lin, Ning Lu, Kai Huang
Objective To prepare biomimetic bone material by reconstructing type Ⅰ collagen combined with polyaspartic acid. Methods By acid hydrolysis,rat tail type Ⅰ collagen was decomposed into collagen fibers,which were then placed in the calcium phosphate mineralization solution. Under the cross-linking of glutaraldehyde,the collagen fibers were reconstructed and assembled into collagen fibers,and the calcium phosphate crystals were wrapped in the inner side of the collagen fibers for biomineralizationin. After poly aspartate acid was added,calcium hydroxyapatite calcium precursor was added into the collagen fibers to simulate thebiomimetic biomineralizationin the human body...
June 20, 2017: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/28691035/corneal-collagen-cross-linking-for-keratoconus-systematic-review
#12
REVIEW
Hidenaga Kobashi, Shi Song Rong
PURPOSE: To evaluate the efficacy of collagen cross-linking (CXL) one year after treatment for keratoconus compared to no treatment by summarizing randomized controlled trials (RCTs) using a systematic review. METHODS: Trials meeting the selection criteria were quality appraised, and the data were extracted by two independent authors. The outcome parameters included maximum keratometry (Kmax), corneal thickness at the thinnest point, best spectacle-corrected visual acuity (BSCVA), uncorrected visual acuity (UCVA), spherical equivalent (SE) refraction, and cylindrical refraction one year after CXL...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28690911/two-year-clinical-outcome-of-denosumab-treatment-alone-and-in-combination-with-teriparatide-in-japanese-treatment-naive-postmenopausal-osteoporotic-women
#13
Yukio Nakamura, Takako Suzuki, Mikio Kamimura, Shota Ikegami, Kohei Murakami, Shigeharu Uchiyama, Akira Taguchi, Hiroyuki Kato
This randomized prospective study aimed to evaluate the clinical outcome of denosumab treatment alone and in combination with teriparatide in treatment-naive postmenopausal Japanese female patients with osteoporosis. Thirty patients were randomly assigned to two groups: (1) denosumab group (denosumab alone, n=13); and (2) combination group (denosumab+teriparatide, n=17). Serum bone-specific alkaline phosphatase (BAP), serum tartrate-resistant acid phosphatase (TRACP)-5b, urinary cross-linked N-terminal telopeptides of type I collagen (NTX), and bone mineral density (BMD) of L1-4 lumbar vertebrae (L-BMD) and bilateral total hips (H-BMD) were determined at the first visit and at various time points up to 24 months post-treatment to determine percentage changes...
2017: Bone Research
https://www.readbyqxmd.com/read/28689749/iontophoresis-assisted-accelerated-riboflavin-ultraviolet-a-scleral-cross-linking-a-potential-treatment-for-pathologic-myopia
#14
Shuo Rong, Chaoying Wang, Baoyan Han, Pengfei Feng, Weiwei Lan, Zhipeng Gao, Xiaona Li, Weiyi Chen
Scleral collagen cross-linking is one of the most promising treatments to control the pathologic process of myopia. However, the exact procedure and its impact on animal models of myopia are still to be explored. We modified the scleral riboflavin/ultraviolet A (UVA) cross-linking procedure with an iontophoresis-assisted drug delivery system and an accelerated UVA irradiation (10 mW/cm(2), 9 min) and applied this treatment to an animal model of myopia. Ninety-six New Zealand White rabbits developed relatively stable myopia by visual deprivation and then underwent the modified scleral cross-linking surgery...
July 6, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28685537/effect-of-xianling-gubao-capsules-on-bone-mineral-density-in-osteoporosis-patients
#15
Z H Wu, X Zhu, C K Xu, Y J Chen, L Zhang, C L Zhang
This paper aimed to analyze the clinical effects of Xianling Gubao capsules on the bone mineral density (BMD) of 94 patients with osteoporosis. After reviewing and analyzing the clinical information in our hospital from January 2015 to January 2016, the patients were divided into a control group and a treatment group with 47 cases in each group. Patients in the control group were treated with routine Western medicine, while the treatment group received Xianling Gubao capsules. Both groups were treated continuously for 3 courses (30 days each course) and had their BMD analyzed and compared...
April 2017: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28682555/-progress-on-matrix-metalloproteinase-inhibitors
#16
Jia Lingling, Wan Qianbing
Continuing advances in dentin bonding technology and adhesives revolutionized bonding of resin-based composite restorations. However, hybrid layers created by contemporary dentin adhesives present imperfect durability, and degradation of collagen matrix by endogenous enzymes is a significant factor causing destruction of hybrid layers. Bond durability can be improved by using enzyme inhibitors to prevent collagen degradation and to preserve integrity of collagen matrix. This review summarizes progress on matrix metalloproteinase inhibitors (including chlorhexidine, ethylenediaminetetraacetic acid, quaternary ammonium salt, tetracycline and its derivatives, hydroxamic acid inhibitors, bisphosphonate derivative, and cross-linking agents) and suggests prospects for these compounds...
April 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28677860/molecular-magnetic-resonance-imaging-of-lung-fibrogenesis-with-an-oxyamine-based-probe
#17
Philip A Waghorn, Chloe M Jones, Nicholas J Rotile, Steffi K Koerner, Diego S Ferreira, Howard H Chen, Clemens K Probst, Andrew M Tager, Peter Caravan
Fibrogenesis is the active production of extracellular matrix in response to tissue injury. In many chronic diseases persistent fibrogenesis results in the accumulation of scar tissue, which can lead to organ failure and death. However, no non-invasive technique exists to assess this key biological process. All tissue fibrogenesis results in the formation of allysine, which enables collagen cross-linking and leads to tissue stiffening and scar formation. We report herein a novel allysine-binding gadolinium chelate (GdOA), that can non-invasively detect and quantify the extent of fibrogenesis using magnetic resonance imaging (MRI)...
July 5, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28677013/a-meta-analysis-survey-of-appropriate-bone-turnover-markers-in-the-detection-of-bone-metastasis-in-lung-cancer
#18
Jianda Huang, Tongjie Gu, Jun Ying
BACKGROUND: A number of studies have investigated the clinical significance of bone turnover markers (BTMs) for the diagnosis of bone metastasis (BM) in lung cancer; however, they led to contradictory results. The aim of this meta-analysis was to investigate whether BTMs differ between lung cancer patients with and without BM. METHODS: Articles were identified by searching Medline, Embase, Web of Science and Scopus. The studies that were identified were pooled and the weighted mean difference (WMD) and its corresponding 95% confidence interval (CI) were calculated...
July 4, 2017: International Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28669721/initial-investigation-of-individual-and-combined-annulus-fibrosus-and-nucleus-pulposus-repair-ex-vivo
#19
Stephen R Sloan, Devis Galesso, Cynthia Secchieri, Connor Berlin, Roger Hartl, Lawrence J Bonassar
Novel tissue engineered and biomaterial approaches to treat intervertebral disc (IVD) degeneration focus on single aspects of the progressive disease and hence are insufficient repair strategies. In this study, annulus fibrosus (AF) and nucleus pulposus (NP) biomaterial repair strategies were used individually and combined to treat IVD degeneration modeled in ex vivo rat-tail motion segments by annulotomy and nucleotomy. An injectable riboflavin cross-linked high-density collagen gel patched defects in the AF, while NP repair consisted of injections of a modified hyaluronic acid (HA) hydrogel...
June 29, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28668305/detrimental-role-of-lysyl-oxidase-in-cardiac-remodeling
#20
Elia C El Hajj, Milad C El Hajj, Van K Ninh, Jessica M Bradley, Mario A Claudino, Jason D Gardner
A key feature of heart failure is adverse extracellular matrix (ECM) remodeling, which is associated with increases in the collagen cross-linking enzyme, lysyl oxidase (LOX). In this study, we assess the progression of cardiovascular remodeling from the compensatory to decompensatory phase, with a focus on the change in LOX expression and activity as it relates to alterations in ECM composition and changes in cardiac function. Adult male Sprague-Dawley rats were studied after 4, 14, or 21weeks of aortocaval fistula-induced volume overload (VO)...
June 29, 2017: Journal of Molecular and Cellular Cardiology
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