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Clare Nevin, Lauren McNeil, Nessar Ahmed, Chris Murgatroyd, Daniel Brison, Michael Carroll
Glycation is the non-enzymatic reaction between reducing sugars, such as glucose, and proteins, lipids or nucleic acids, producing Advanced Glycation End (AGE) products. AGEs, produced during natural senescence as well as through lifestyle factors such as diet and smoking, are key pathogenic compounds in the initiation and progression of diabetes. Importantly, many of these factors and conditions also have influence on male fertility, affecting sperm count and semen quality, contributing to the decreasing trend in male fertility...
June 13, 2018: Scientific Reports
Yingcong Ma, Meng Sha, Shixuan Cheng, Wang Yao, Zhongjun Li, Xian-Rong Qi
The CD44 protein, as a predominant receptor for hyaluronan (HA), is highly expressed on the surface of multiple tumor cells. HA, as a targeting molecule for a CD44-contained delivery system, increases intracellular drug concentration in tumor tissue. However, due to the weak binding ability of hyaluronan oligosaccharide to CD44, targeting for tumor drug delivery has been restricted. In this study, we first use a HA tetrasaccharide cluster as the target ligand to enhance the binding ability to CD44. A polyamidoamine (PAMAM) dendrimer was modified by a HA tetrasaccharide cluster as a nonviral vector for small interfering RNA (siRNA) delivery...
June 14, 2018: Nanomaterials
Marwa M Qadri, Gregory D Jay, Rennolds S Ostrom, Ling X Zhang, Khaled A Elsaid
Osteoarthritis (OA) is characterized by synovitis and synovial fibrosis. Synoviocytes are fibroblast-like resident cells of the synovium that are activated by TGF-β to proliferate, migrate and produce extracellular matrix. Synoviocytes secrete hyaluronan (HA) and proteoglycan-4 (PRG4). HA reduced synovial fibrosis in vivo and the Prg4-/- mouse exhibits synovial hyperplasia. We investigated the antifibrotic effects of increased intracellular cAMP in TGF-β stimulated human OA synoviocytes. TGF-β1 stimulated collagen I (COL1A1), α-SMA, TIMP-1, PLOD2 expression and procollagen I, α-SMA, HA and PRG4 production, migration and proliferation of OA synoviocytes were measured...
June 13, 2018: American Journal of Physiology. Cell Physiology
Thi Tuong Vy Phan, Nhat Quang Bui, Soon-Woo Cho, Subramaniyan Bharathiraja, Panchanathan Manivasagan, Madhappan Santha Moorthy, Sudip Mondal, Chang-Seok Kim, Junghwan Oh
Cancer theragnosis agents with both cancer diagnosis and therapy abilities would be the next generation of cancer treatment. Recently, nanomaterials with strong absorption in near-infrared (NIR) region have been explored as promising cancer theragnosis agents for bio-imaging and photothermal therapy (PTT). Herein, we reported the synthesis and application of a novel multifunctional theranostic nanoagent based on hyaluronan (HA)-coated FeOOH@polypyrrole (FeOOH@PPy) nanorods (HA-FeOOH@PPy NRs) for photoacoustic imaging (PAI)-guided PTT...
June 11, 2018: Scientific Reports
Sampa Ghose, Subhrajit Biswas, Kasturi Datta, Rakesh K Tyagi
BACKGROUND: Angiogenesis, the formation of new blood vessels from pre-existing vasculature is essential in a number of physiological processes such as embryonic development, wound healing as well as pathological conditions like, tumor growth and metastasis. Hyaluronic acid (HA), a high molecular weight polysaccharide, major component of extracellular matrix is known to associate with malignant phenotypes in melanomas and various other carcinomas. Hyaluronic acid binding protein 1 (HABP1) has been previously reported to trigger enhanced cellular proliferation in human liver cancer cells upon its over-expression...
June 11, 2018: BMC Cancer
Álvarez-Rodriguez Manuel, Vicente-Carrillo Alejandro, Rodriguez-Martinez Heriberto
Hyaluronan (hyaluronic acid, HA) apparently improves sperm survival in vitro and in vivo (oviduct), maintaining sperm motility and inducing capacitation, but not acrosome exocytosis, either by direct action as a macromolecule or via CD44 membrane receptors. This study explored ejaculated, liquid-extended pig spermatozoa to ascertain (i) the presence (Western blotting) and specific location (immunocytochemistry) of the CD44 receptor, using a specific monoclonal commercial antibody; (ii) whether the CD44 receptor changed location when exposed to bicarbonate, a capacitating trigger, in vitro; and (iii) whether the addition of HA, of molecular size comparable to that produced in the oviduct sperm reservoir (0...
June 8, 2018: Journal of Reproduction and Development
Liam Byrne, Nchafatso G Obonyo, Sara D Diab, Kimble R Dunster, Margaret R Passmore, Ai-Ching Boon, Louise See Hoe, Sanne Pedersen, Mohd Hashairi Fauzi, Leticia Pretti Pimenta, Frank Van Haren, Christopher M Anstey, Louise Cullen, John-Paul Tung, Kiran Shekar, Kathryn Maitland, John F Fraser
BACKGROUND: Fluid resuscitation is widely considered a life saving intervention in septic shock however recent evidence has questioned both its safety and efficacy in sepsis. This study sought to compare fluid resuscitation with vasopressors with vasopressors alone in a hyperdynamic model of ovine endotoxemia. METHODS: Endotoxemic shock was induced in sixteen sheep after which they received fluid resuscitation with 40mls/kg of 0.9% saline or commenced haemodynamic support with protocolized noradrenaline and vasopressin...
June 8, 2018: American Journal of Respiratory and Critical Care Medicine
Sophie Dogné, Bruno Flamion, Nathalie Caron
The endothelial glycocalyx (EG), which covers the apical surface of the endothelial cells and floats into the lumen of the vessels, is a key player in vascular integrity and cardiovascular homeostasis. The EG is composed of PGs (proteoglycans), glycoproteins, glycolipids, and glycosaminoglycans, in particular hyaluronan (HA). HA seems to be implicated in most of the functions described for EG such as creating a space between blood and the endothelium, controlling vessel permeability, restricting leukocyte and platelet adhesion, and allowing an appropriate endothelial response to flow variation through mechanosensing...
June 7, 2018: Arteriosclerosis, Thrombosis, and Vascular Biology
Yuji Taya, Kaori Sato, Youichi Shirako, Yuuichi Soeno
Lymphatic development in mice is initiated in the trunk at embryonic day (E) 9.5. This study aimed to examine the origin of craniofacial lymphatic endothelial cells (LECs) and the developmental process of lymphatic vessels in the mouse craniofacial region. Serial sections from ICR mouse embryos at E9.5-E14.5 were immunolabeled with LEC and venous endothelial cell (VEC) markers. These markers included prospero homeobox protein 1 (Prox1), vascular endothelial growth factor receptor 3 (Vegfr3), lymphatic vessel endothelial hyaluronan receptor 1 (Lyve1), and C-C motif chemokine 2 (Ccl21) for LEC, and COUP transcription factor 2 (CoupTF2) and endomucin (Emcn) for VEC...
2018: International Journal of Developmental Biology
Takao Someya, Katsura Sano, Kotaro Hara, Yoshimasa Sagane, Toshihiro Watanabe, R G S Wijesekara
This data article provides gene expression profiles, determined by using real-time PCR, of fibroblasts and keratinocytes treated with 0.01% and 0.001% extracts of holy basil plant ( Ocimum tenuiflorum ), sri lankan local name "maduruthala", 0.1% and 0.01% extracts of malabar nut plant ( Justicia adhatoda ), sri lankan local name "adayhoda" and 0.003% and 0.001% extracts of emblic myrobalan plant ( Phyllanthus emblica ), sri lankan local name "nelli", harvested in Sri Lanka. For fibroblasts, the dataset includes expression profiles for genes encoding hyaluronan synthase 1 (HAS1), hyaluronan synthase 2 (HAS2), hyaluronidase-1 (HYAL1), hyaluronidase-2 (HYAL2), versican, aggrecan, CD44, collagen, type I, alpha 1 (COL1A1), collagen, type III, alpha 1 (COL3A1), collagen, type VII, alpha 1 (COL7A1), matrix metalloproteinase 1 (MMP1), acid ceramidase, basic fibroblast growth factor (bFGF), fibroblast growth factor-7 (FGF7), vascular endothelial growth factor (VEGF), interleukin-1 alpha (IL-1α), cyclooxygenase-2 (cox2), transforming growth factor beta (TGF-β), and aquaporin 3 (AQP3)...
April 2018: Data in Brief
Young-Dae Kim, Han-Seop Kim, Jungwoon Lee, Jung-Kyun Choi, Enna Han, Ji Eun Jeong, Yee Sook Cho
The importance of alternative splicing (AS) events in pluripotency regulation has been highlighted by the determination of different roles and contributions of different splice isoforms of pluripotency-related genes and by the identification of distinct pluripotency-related splicing factors. In particular, epithelial splicing regulatory protein 1 (ESRP1) has been characterized as an essential splicing factor required for the regulation of human pluripotency and differentiation. Nevertheless, a detailed molecular characterization of ESRP1 (mRNA splice variants 1-6) in human pluripotency is lacking...
June 6, 2018: Stem Cells
James B McCarthy, Dorraya El-Ashry, Eva A Turley
This review summarizes the roles of CAFs in forming a "cancerized" fibrotic stroma favorable to tumor initiation and dissemination, in particular highlighting the functions of the extracellular matrix component hyaluronan (HA) in these processes. The structural complexity of the tumor and its host microenvironment is now well appreciated to be an important contributing factor to malignant progression and resistance-to-therapy. There are multiple components of this complexity, which include an extensive remodeling of the extracellular matrix (ECM) and associated biomechanical changes in tumor stroma...
2018: Frontiers in Cell and Developmental Biology
Gloria Huerta-Ángeles, Kristina Nešporová, Gabriela Ambrožová, Lukas Kubala, Vladimir Velebný
This review shows the steps toward material selection focalized on the design and development of medical devices based on hyaluronan (HA). The selection is based on chemical and mechanical properties, biocompatibility, sterilization, safety, and scale-up costs. These facts play a vital role in the industrialization process. Approved medical devices containing-HA are illustrated to identify key parameters. The first part of this work involves the steps toward a complete characterization of chemical and mechanical aspects, reproducibility of the processes and scale up...
2018: Frontiers in Bioengineering and Biotechnology
Anne-Catherine Raby, Guadalupe T González-Mateo, Aled Williams, Nicholas Topley, Donald Fraser, Manuel López-Cabrera, Mario O Labéta
Peritoneal membrane failure due to fibrosis limits the use of peritoneal dialysis (PD). Peritoneal fibrosis may potentially be induced by sterile inflammation caused by ongoing cellular stress due to prolonged exposure to PD solutions (PDS). Effective therapies to prevent this process remain to be developed. Toll-like receptors (TLRs) mediate sterile inflammation by recognizing damage-associated molecular patterns (DAMPs) released by cellular stress. We evaluated the involvement of TLRs and DAMPs in PDS-induced fibrosis models and the therapeutic potential of TLR-DAMP targeting for preventing fibrosis...
May 31, 2018: Kidney International
Oksana Kowalczuk, Jerzy Laudanski, Wojciech Laudanski, Wieslawa Ewa Niklinska, Miroslaw Kozlowski, Jacek Niklinski
The present study aimed to verify a possibility of ongoing lymphangiogenesis in non-small cell lung cancer (NSCLC) via examination of mRNA levels of a number of lymphangiogenesis-associated genes in tumors. It was hypothesized that transcriptional activation of these genes would occur in tumors that stimulate new lymphatic vessel formation. The study was performed on 140 pairs of fresh-frozen surgical specimens of cancer and unaffected lung tissues derived from NSCLC stage I-IIIA patients. mRNA levels were evaluated with the reverse transcription-quantitative polymerase chain reaction method and expressed as fold change differences between the tumor and normal tissues...
May 2018: Oncology Letters
Jay M Patel, Ryan C Jackson, Greta L Schneider, Salim A Ghodbane, Michael G Dunn
Collagen-based scaffolds are extensively used in biomaterials and tissue engineering applications. These scaffolds have shown great biocompatibility and versatility, but their relatively low mechanical properties may limit use in orthopaedic load-bearing applications. Moreover, terminal sterilization with gamma irradiation, as is commonly performed with commercial devices, presents concerns over structural integrity and enzymatic stability. Therefore, the goal of this study was to test the hypothesis that EDC/NHS cross-linking (10 mM/5 mM) can protect collagen-hyaluronan sponges from the damaging effects of gamma irradiation...
May 28, 2018: Journal of Materials Science. Materials in Medicine
Nour M Al-Shammari, Sanaa M Shafshak, Mohamed S Ali
OBJECTIVE: The aim of this study is to evaluate the effect of the subgingival application of 0.8% hyaluronic acid (HA) gel (GENGIGEL®) as an adjunct to scaling and root planing (SRP) on clinical parameters and expression of human beta defensin-2 (hBD-2) in patients with moderate to severe chronic periodontitis. MATERIALS AND METHODS: In this randomized, split mouth design study, 24 participants with moderate to severe chronic periodontitis were evaluated after full mouth SRP...
May 1, 2018: Journal of Contemporary Dental Practice
Hieu T Bui, Aidan Rw Friederich, Emily Li, David A Prawel, Susan P James
Heart disease continues to be the leading cause of death in the United States. The demand for cardiovascular bypass procedures increases annually. Expanded polytetrafluoroethylene is a popular material for replacement implants, but it does have drawbacks such as high thrombogenicity and low patency, particularly in small diameter grafts. Hyaluronan, a naturally occurring polysaccharide in the human body, is known for its wound healing and anticoagulant properties. In this work, we demonstrate that treating the luminal surface of expanded polytetrafluoroethylene grafts with hyaluronan improves hemocompatibility without notably changing its mechanical properties and without significant cytotoxic effects...
January 1, 2018: Journal of Biomaterials Applications
Josef Chmelař, Petr Bělský, Jiří Mrázek, Daniel Švadlák, Martina Hermannová, Miroslav Šlouf, Ivan Krakovský, Daniela Šmejkalová, Vladimír Velebný
Acyl derivatives of hyaluronan (acyl-HA) are promising materials for biomedical applications. Depending on the acyl length and the degree of substitution, these derivatives range from self-assembling water-soluble polymers to materials insoluble in aqueous environments. The behaviour of acyl-HA was studied in solution, but little attention was paid to the solid state, despite its importance for applications such as medical device fabrication. We thus used X-ray scattering and electron microscopy to explore the solid-state nano-structure of acyl-HA...
September 1, 2018: Carbohydrate Polymers
Chunyan Hou, Hu Bai, Zhaojie Wang, Yuanhao Qiu, Li-Li Kong, Feifei Sun, Dongdong Wang, Hong Yin, Xiaoli Zhang, Haibo Mu, Jinyou Duan
Accompanied by overproduction of oxidants and reduction of pH, inflammation is closely related to many diseases such as cancer, atherosclerosis, and asthma. Besides chemotherapeutic agents, the potential regulative role of autophagy in inflammation is being actively investigated. RNA interference (RNAi)-based gene therapy is widely explored for clinical therapy but seriously restricted by lack of suitable carriers. In this study, we synthesized a hyaluronan-based ROS-sensitive polymer which was expected to release loaded chemical drugs in inflammatory environment and further developed a stable and nontoxic co-delivery nanosystem of siRNA targeting autophagy suppressive gene and chemotherapeutic agents...
September 1, 2018: Carbohydrate Polymers
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