Read by QxMD icon Read

Self healing

Tim Sebastian, Jörn F Dopheide, Rolf P Engelberger, David Spirk, Nils Kucher
BACKGROUND: Occlusion of the inferior vena cava (IVC) often causes venous claudication, leg swelling, or skin changes. We hypothesized that the outcome of nitinol stents for endovascular reconstruction of the IVC is similar to the outcome reported for steel alloy stents. METHODS: From the prospective Bern Venous Stent Registry, we investigated technical success, patency rates, and clinical outcome in consecutive patients with endovascular IVC reconstruction. During routine follow-up visits, stent patency was assessed by duplex ultrasound...
March 14, 2018: Journal of Vascular Surgery. Venous and Lymphatic Disorders
Yizhi Zhuo, Verner Håkonsen, Zhiwei He, Senbo Xiao, Jianying He, Zhiliang Zhang
Ice accretion presents a severe risk for human safety. Despite great efforts for developing icephobic surfaces (the surface with an ice adhesion strength below 100 kPa) have been devoted, expanding the lifetime of state-of-the-art icephobic surfaces still remains as a critical unsolved issue. Herein, a novel icephobic material is designed by integrating interpenetrating polymer network (IPN) into autonomous self-healing elastomer, and applied in anti-icing for enhancing mechanical durability. The molecular structure, surface morphology, mechanical properties and durable icephobicity of the material were studied...
March 16, 2018: ACS Applied Materials & Interfaces
Musammir Khan, Janne T Koivisto, Terttu I Hukka, Mikko Hokka, Minna Kellomäki
Biopolymers are attractive candidates to fabricate biocompatible hydrogels, but the low water solubility of most of them at physiological pH, has hindered their applications. To prepare a water-soluble derivative of chitosan (WSC) biopolymer, it was grafted with a small anionic amino acid, L-glutamic acid, using a single step 1-Ethyl-3-[3-dimethylaminopropyl] carbodiimide coupling reaction. This resulted in a zwitterion-tethered structure onto the polymer backbone. The degree of substitution ranged between 13-16 ± 1...
March 15, 2018: ACS Applied Materials & Interfaces
Xiaoye Yang, Xiaoqun Shi, Jianbo Ji, Guangxi Zhai
The development of imaging-guided smart drug delivery systems for combinational photodynamic/chemotherapy of the tumor has become highly demanded in oncology. Herein, redox-responsive theranostic polymeric nanoparticles (NPs) were fabricated innovatively using low molecular weight heparin (LWMH) as the backbone. Chlorin e6 (Ce6) and alpha-tocopherol succinate (TOS) were conjugated to LMWH via cystamine as the redox-sensitive linker, forming amphiphilic Ce6-LMWH-TOS (CHT) polymer, which could self-assemble into NPs in water and encapsulate paclitaxel (PTX) inside the inner core (PTX/CHT NPs)...
November 2018: Drug Delivery
He Zhang, Jinglei Yang
Hollow glass bubbles (HGBs) with through-holes at micron level were fabricated by etching them using diluted 1% hydrofluoric acid (HF) solution in a specially designed reaction system. In this study, the function of each component in the system was carefully investigated and improved to realize the controllable etching process. Various parameters were investigated to explore the optimal etching condition. Highest gross yield of about 85% and effective yield of about 50% were obtained at the optimized etching condition...
March 14, 2018: Journal of Microencapsulation
J Bennett, T Adriaenssens, K McCutcheon, J Dens, W Desmet, P Sinnaeve, M Vrolix, C Dubois
OBJECTIVES: We evaluated healing responses with optical coherence tomography, and long-term clinical outcomes after treatment with a dedicated stent versus a conventional culotte technique. BACKGROUND: Dedicated bifurcation stents have been proposed as an alternative treatment for coronary bifurcation lesions. The long-term performance of dedicated stents versus conventional dual-stent techniques for the treatment of complex coronary bifurcation lesions is unknown...
March 14, 2018: Catheterization and Cardiovascular Interventions
Fu-Shu Jin, Hong-Mei Wang, Xiao-Yan Song
Long non-coding RNA (lnc)TCF7 has been reported to promote the self‑renewal of human cancer stem cells, and enhance the aggressiveness of human non‑small cell lung cancer and hepatocellular carcinoma cells. However, the effect of lncTCF7 on colorectal cancer (CRC) tumorigenesis and progression is currently unclear. In the present study, reverse transcription‑quantitative polymerase chain reaction results demonstrated that lncTCF7 expression was higher in CRC tissues compared with adjacent normal tissues and was significantly associated with tumor size, differentiation degree, tumor‑node‑metastasis grade, lymph node metastasis and invasion depth...
March 9, 2018: Molecular Medicine Reports
Shunli Liu, Kewen Li, Imtiaz Hussain, Olayinka Oderinde, Fang Yao, Jiuyang Zhang, Guo Dong Fu
Mechanically-tough and electrical conductive self-healing hydrogels may have broad applications in wearable electronics, health-monitoring systems, and smart robotics in the following years. Here, we proposed a new design strategy to synthesize a dual physical cross-linked polyethylene glycol/poly(acrylic acid) (PEG/PAA) double network hydrogel, consisting of an ferric ions cross-linked linear chain extension of PEG (2, 6-pyridinedicarbonyl moieties incorporated in the PEG backbone, PEG-H2pdca) as the first physical network and a PAA-Fe3+ gel as the second physical network...
March 13, 2018: Chemistry: a European Journal
Fernando Ruipérez, Maialen Galdeano, Ekiñe Gimenez, Jon M Matxain
The theoretical self-healing capacity of new sulfenamide-based disulfides is estimated by using theoretical methods of quantum chemistry. Starting from previously studied aromatic disulfides, the influence of inserting a NH group between the disulfide and the phenyl ring (forming the sulfenamide), as well as the role of the phenyl ring in the self-healing process is analyzed. Three parameters are used in the evaluation of the self-healing capacity: i) the probability to generate sulfenyl radicals, which is the first step of the process; ii) the effect of the hydrogen bonding, which affects the mobility of the chains; and iii) the height of the exchange reaction barrier...
March 2018: ChemistryOpen
A González, J Norambuena-Contreras, L Storey, E Schlangen
The concept of self-healing asphalt mixtures by bitumen temperature increase has been used by researchers to create an asphalt mixture with crack-healing properties by microwave or induction heating. Metals, normally steel wool fibers (SWF), are added to asphalt mixtures prepared with virgin materials to absorb and conduct thermal energy. Metal shavings, a waste material from the metal industry, could be used to replace SWF. In addition, reclaimed asphalt pavement (RAP) could be added to these mixtures to make a more sustainable road material...
March 9, 2018: Journal of Environmental Management
Taichi Ikeda
Glycidyl triazolyl polymer (GTP), which is the product of the Huisgen dipolar cycloaddition reaction between glycidyl azide polymer and alkyne derivatives, is featured here. GTP is the multifunctionalized poly(ethylene glycol) (PEG). The drawback of PEG is that linear PEG has the functional group only at both ends. The low loading capability of the functional groups limits the possibilities of PEG applications. GTP facilitates the synthesis of multifunctionalized PEG derivatives. In this article, 74 examples of GTP homopolymers and copolymers are introduced...
March 12, 2018: Macromolecular Rapid Communications
Hao Zhang, Zhong-Li Li, Fei Yang, Qiang Zhang, Xiang-Zheng Su, Ji Li, Ning Zhang, Chun-Hui Liu, Ning Mao, Heng Zhu
BACKGROUND: Shockwaves and mesenchymal stem cells (MSCs) have been widely accepted as useful tools for many orthopedic applications. However, the modulatory effects of shockwaves on MSCs remain controversial. In this study, we explored the influence of radial shockwaves on human bone marrow MSCs using a floating model in vitro and evaluated the healing effects of these cells on cartilage defects in vivo using a rabbit model. METHODS: MSCs were cultured in vitro, harvested, resuspended, and treated with various doses of radial shockwaves in a floating system...
March 9, 2018: Stem Cell Research & Therapy
Soumen De, Rafal Klajn
Dissipative self-assembly leads to structures and materials that exist away from equilibrium by continuously exchanging energy and materials with the external environment. Although this mode of self-assembly is ubiquitous in nature, where it gives rise to functions such as signal processing, motility, self-healing, self-replication, and ultimately life, examples of dissipative self-assembly processes in man-made systems are few and far between. Herein, recent progress in developing diverse synthetic dissipative self-assembly systems is discussed...
March 9, 2018: Advanced Materials
V Bonito, A I P M Smits, O J G M Goor, B D Ippel, A Driessen-Mol, T J A G Münker, A W Bosman, T Mes, P Y W Dankers, C V C Bouten
Hallmark of the in situ tissue engineering approach is the use of bioresorbable, synthetic, acellular scaffolds, which are designed to modulate the inflammatory response and actively trigger tissue regeneration by the body itself at the site of implantation. Much research is devoted to the design of synthetic materials modulating the polarization of macrophages, which are essential mediators of the early stages of the inflammatory response. Here, we present a novel method for the functionalization of elastomers based on synthetic peptide chemistry, supramolecular self-assembly, and immobilization of heparin and interleukin 4 (IL-4), which is known to skew the polarization of macrophages into the wound healing "M2" phenotype...
March 5, 2018: Acta Biomaterialia
Rostyslav V Bubnov, Maria V Drahulian, Polina V Buchek, Tamara P Gulko
Background: Liver fibrosis (LF) is a chronic disease, associated with many collateral diseases including reproductive dysfunction. Although the normal liver has a large regenerative capacity the complications of LF could be severe and irreversible. Hormone and sex-related issues of LF development and interactions with male reproductive have not been finally studied. The aim was to study the reproductive function of male rats in experimental CCl4 -induced liver fibrosis rat model, and the capability for restoration of both the liver and male reproduction system...
March 2018: EPMA Journal
Igor Elman, David Borsook
Pain is essential for avoidance of tissue damage and for promotion of healing. Notwithstanding the survival value, pain brings about emotional suffering reflected in fear and anxiety, which in turn augment pain thus giving rise to a self-sustaining feedforward loop. Given such reciprocal relationships, the present article uses neuroscientific conceptualizations of fear and anxiety as a theoretical framework for hitherto insufficiently understood pathophysiological mechanisms underlying chronic pain. To that end, searches of PubMed-indexed journals were performed using the following Medical Subject Headings' terms: pain and nociception plus amygdala, anxiety, cognitive, fear, sensory, and unconscious...
2018: Frontiers in Psychiatry
Xue Qu, Huan Liu, Chuchu Zhang, Yu Lei, Miao Lei, Miao Xu, Dawei Jin, Peng Li, Meng Yin, Gregory F Payne, Changsheng Liu
Electrical signals can be imposed with exquisite spatiotemporal control and provide exciting opportunities to create structure and confer function. Here, we report the use of electrical signals to program the fabrication of a chloramine wound dressing with high antimicrobial activity. This method involves two electrofabrication steps: (i) a cathodic electrodeposition of an aminopolysaccharide chitosan triggered by a localized region of high pH; and (ii) an anodic chlorination of the deposited film in the presence of chloride...
March 2, 2018: Acta Biomaterialia
XiangYu Xu, SongBo Han, Liang Jiang, ShaoMin Yang, XiaoGuang Liu, HuiShu Yuan, Feng Wei, FengLiang Wu, Lei Dang, Hua Zhou, Hua Zhang, ZhongJun Liu
BACKGROUND CONTEXT: Langerhans cell histiocytosis (LCH) of the spine is a relatively rare condition with unknown etiology. The diagnosis and treatment protocols for spine LCH remain controversial. PURPOSE: In this study, we evaluated the efficacy and safety of our proposed diagnosis and treatment protocol introduced in 2009. STUDY DESIGN: This is a retrospective study. PATIENT SAMPLE: One hundred and ten patients with spine LCH who had been diagnosed and treated in our hospital from October 1997 to November 2015 were included in this study...
March 2, 2018: Spine Journal: Official Journal of the North American Spine Society
Heshu Fang, Xia Zhao, Yuan Lin, Song Yang, Jun Hu
Construction of stimuli-responsive materials using naturally occurring molecules as building blocks has received increasing attention in terms of bioavailability, biocompatibility, and biodegradability. In this research, a symmetrical azobenzene-functionalized natural glycyrrhizic acid (trans-GAG) was synthesized, which could form the stable supramolecular gels in DMSO/H2O and MeOH/H2O, respectively. On account of trans-cis isomerization, this gel exhibited a typical light-responsive behavior, thus leading to a reversible gel-sol transition accompanied with the variation in morphology and rheology...
March 5, 2018: Chemistry, An Asian Journal
J Wu, X Y Duan, Q G Zhu
To study the effect of quality nursing on postoperative incision infection in urological patients, 200 subjects admitted to our hospital between June 2016 and June 2017 were included in this study and divided into a quality nursing group (group A) and a general nursing group (group B), 100 in each group. Blood loss, blood transfusion, hospital stay, incision healing, incision infection, and self-rating depression scale (SDS) scores in both groups were compared. It was found that the bleeding volume in group A was significantly less than that in group B, and there was significant difference between the two groups (P less than 0...
January 2018: Journal of Biological Regulators and Homeostatic Agents
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"