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https://www.readbyqxmd.com/read/27919839/heparin-hyaluronic-acid-hydrogel-for-efficient-cellular-activities-of-3d-encapsulated-adipose-derived-stem-cells
#1
Kihak Gwon, Eunsol Kim, Giyoong Tae
We have developed stem cell-responsive, heparin-hyaluronic acid (Hep-HA) hydrogel, crosslinked by thiolated heparin (Hep-SH) and methacrylated hyaluronic acid (HA-MA) via visible light mediated, thiol-ene reaction. Physical properties of the hydrogel (gelation time, storage modulus, and swelling ratio) were tunable by adjusting light intensity, initiator/polymer concentration, and precursor pH. Culture of human adipose derived mesenchymal stem cells (ADSCs) using this hydrogel was characterized and compared with the control hydrogels including Hep-PEG hydrogel, PEG-HA hydrogel...
December 2, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27915048/protective-effects-of-green-tea-and-its-main-constituents-against-natural-and-chemical-toxins-a-comprehensive-review
#2
REVIEW
Maryam Rameshrad, Bibi Marjan Razavi, Hossein Hosseinzadeh
Toxins are natural or chemical poisonous substances with severe side effects on health. Humans are generally exposed by widespread toxic contaminations via air, soil, water, food, fruits and vegetables. Determining a critical antidote agent with extensive effects on different toxins is an ultimate goal for all toxicologists. Traditional medicine is currently perceived as a safe and natural approach against toxins. In this regard, we focused on the protective effects of green tea (Camellia sinensis) and its main components such as catechin, epicatechin, epicatechin gallate, gallocatechin, epigallocatechin and epigallocatechin gallate as a principal source of antioxidants against both natural and chemical toxins...
November 30, 2016: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/27914888/the-first-report-on-transcriptome-analysis-of-the-venom-gland-of-iranian-scorpion-hemiscorpius-lepturus
#3
Fatemeh Kazemi-Lomedasht, Vahid Khalaj, Kamran Pooshang Bagheri, Mahdi Behdani, Delavar Shahbazzadeh
Hemiscorpius lepturus scorpion is one of the most venomous members of the Hemiscorpiidae family. H. lepturus is distributed in Iran, Iraq and Yemen. The prevalence and severity of scorpionism is high and health services are not able to control it. Scorpionism in Iran especially in the southern regions (Khuzestan, Sistan and Baluchestan, Hormozgan, Ilam) is one of the main health challenges. Due to the medical and health importance of scorpionism, the focus of various studies has been on the identification of H...
November 30, 2016: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/27904505/composition-and-biological-activities-of-the-aqueous-extracts-of-three-scleractinian-corals-from-the-mexican-caribbean-pseudodiploria-strigosa-porites-astreoides-and-siderastrea-siderea
#4
Alejandro García-Arredondo, Alejandra Rojas-Molina, César Ibarra-Alvarado, Fernando Lazcano-Pérez, Roberto Arreguín-Espinosa, Judith Sánchez-Rodríguez
BACKGROUND: Scleractinian corals (stony corals) are the most abundant reef-forming cnidarians found in coral reefs throughout the world. Despite their abundance and ecological importance, information about the diversity of their toxins and their biological activities is very scarce. In this study, the chemical composition and the biological activities of the aqueous extracts of Pseudodiploria strigosa, Porites astreoides and Siderastrea siderea, three scleractinian corals from the Mexican Caribbean, have been assessed for the first time...
2016: Journal of Venomous Animals and Toxins Including Tropical Diseases
https://www.readbyqxmd.com/read/27891461/comparison-of-therapeutic-efficacy-of-placental-extract-with-dexamethasone-and-hyaluronic-acid-with-dexamethasone-for-oral-submucous-fibrosis-a-retrospective-analysis
#5
Palak Hasmukhbhai Shah, Rashmi Venkatesh, Chandramani Bhagawan More, Vaishnavee Vassandacoumara
INTRODUCTION: Oral Submucous Fibrosis (OSMF) is a potentially malignant disease of the oral cavity associated with betel nut chewing. The management of OSMF has been a subject of controversy and no definitive and widely accepted treatment is currently available for this condition. AIM: To retrospectively evaluate the therapeutic efficacy of two treatment regimens (placental extract with dexamethasone and hyaluronic acid with dexamethasone) for the treatment of OSMF...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27890774/inhibition-of-local-effects-induced-by-bothrops-erythromelas-snake-venom-assessment-of-the-effectiveness-of-brazilian-polyvalent-bothropic-antivenom-and-aqueous-leaf-extract-of-jatropha-gossypiifolia
#6
Juliana Félix-Silva, Jacyra A S Gomes, Jacinthia B Xavier-Santos, Júlia G R Passos, Arnóbio A Silva-Junior, Denise V Tambourgi, Matheus F Fernandes-Pedrosa
Bothrops erythromelas is a snake of medical importance responsible for most of the venomous incidents in Northeastern Brazil. However, this species is not included in the pool of venoms that are used in the Brazilian polyvalent bothropic antivenom (BAv) production. Furthermore, it is well known that antivenom therapy has limited efficacy against venom-induced local effects, making the search for complementary alternatives to treat snakebites an important task. Jatropha gossypiifolia is a medicinal plant widely indicated in folk medicine as an antidote for snakebites, whose effectiveness against Bothrops jararaca venom (BjV) has been previously demonstrated in mice...
November 25, 2016: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/27889600/comparative-proteomic-analysis-of-female-and-male-venoms-from-the-mexican-scorpion-centruroides-limpidus-novel-components-found
#7
Jimena Isaias Cid Uribe, Juana Maria Jiménez Vargas, Cesar Vicente Ferreira Batista, Fernando Zamudio Zuñiga, Lourival Domingos Possani
Venom from male and female scorpions of the species Centruroides limpidus were separated by HPLC and their molecular masses determined by mass spectrometry. The relative concentration of components eluting in equivalent retention times from the HPLC column shows some differences. A new peptide with 29 amino acids, cross-linked by three disulfide bonds was found in male scorpions and its structure determined. Another unknown peptide present in female venom, with sequence identity similar to K(+)-channel blocking peptide was isolated...
November 24, 2016: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/27886639/hyaluronan-derived-swelling-of-solid-tumors-the-contribution-of-collagen-and-cancer-cells-and-implications-for-cancer-therapy
#8
Chrysovalantis Voutouri, Christiana Polydorou, Panagiotis Papageorgis, Vasiliki Gkretsi, Triantafyllos Stylianopoulos
Despite the important role that mechanical forces play in tumor growth and therapy, the contribution of swelling to tumor mechanopathology remains unexplored. Tumors rich in hyaluronan exhibit a highly negative fixed charge density. Repulsive forces among these negative charges as well as swelling of cancer cells due to regulation of intracellular tonicity can cause tumor swelling and development of stress that might compress blood vessels, compromising tumor perfusion and drug delivery. Here, we designed an experimental strategy, using four orthotopic tumor models, to measure swelling stress and related swelling to extracellular matrix components, hyaluronan and collagen, as well as to tumor perfusion...
November 21, 2016: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/27886065/dual-function-of-glucosamine-in-gelatin-hyaluronic-acid-cryogel-to-modulate-scaffold-mechanical-properties-and-to-maintain-chondrogenic-phenotype-for-cartilage-tissue-engineering
#9
Chih-Hao Chen, Chang-Yi Kuo, Yan-Jie Wang, Jyh-Ping Chen
Glucosamine (GlcN) fulfills many of the requirements as an ideal component in scaffolds used in cartilage tissue engineering. The incorporation of GlcN in a gelatin/hyaluronic acid (GH) cryogel scaffold could provide biological cues in maintaining the phenotype of chondrocytes. Nonetheless, substituting gelatin with GlcN may also decrease the crosslinking density and modulate the mechanical properties of the cryogel scaffold, which may be beneficial as physical cues for chondrocytes in the scaffold. Thus, we prepared cryogel scaffolds containing 9% GlcN (GH-GlcN9) and 16% GlcN (GH-GlcN16) by carbodiimide-mediated crosslinking reactions at -16 °C...
November 23, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27879590/intravenous-hyaluronidase-with-urokinase-as-treatment-for-rabbit-retinal-artery-hyaluronic-acid-embolism
#10
ChengAn Chiang, ShuangBai Zhou, ChuHsin Chen, Dave S Ho, HuiZhong Zhang, Kai Liu
BACKGROUND: Although various salvage methods have been proposed to treat intraretinal artery hyaluronic acid embolism, their applications are still limited by various factors. The authors investigated the effectiveness of intravenous hyaluronidase with urokinase for resolving retinal artery hyaluronic acid embolism. METHODS: The anatomy of rabbit ophthalmic and fundus arteries (retinal and choroid artery) was studied. Approximately 0.35 ml of hyaluronic acid was injected into the ophthalmic artery to create a retinal artery embolism model...
December 2016: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27876365/midyear-commentary-on-trends-in-drug-delivery-and-clinical-translational-medicine-growth-in-biosimilar-complex-injectable-drug-formulation-products-within-evolving-collaborative-regulatory-interagency-fda-ftc-and-doj-practices-and-enforcement
#11
Rodney J Y Ho
Before the 2009 Biologics Price Competition and Innovation Act that enabled the U.S. Federal Drug Administration (FDA) to create the 351(k) Biologic License Application-an abbreviated biosimilar approval process, FDA approved follow-on biomolecule products such as beta-interferon, glucagon, hyaluronidase, and somatropin (human growth hormone) under varying and evolving rules. With the 351(k) Biologic License Application biosimilar approval process in place, currently, there are 4 (licensed in 2015-2016) biosimilars available, namely Neupogen (filgrastim; $1 B/y), Humira (adalumumab; $14...
November 19, 2016: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27869206/endotoxin-free-hyaluronan-and-hyaluronan-fragments-do-not-stimulate-tnf-%C3%AE-interleukin-12-or-upregulate-co-stimulatory-molecules-in-dendritic-cells-or-macrophages
#12
Yifei Dong, Arif Arif, Mia Olsson, Valbona Cali, Blair Hardman, Manisha Dosanjh, Mark Lauer, Ronald J Midura, Vincent C Hascall, Kelly L Brown, Pauline Johnson
The extracellular matrix glycosaminoglycan, hyaluronan, has been described as a regulator of tissue inflammation, with hyaluronan fragments reported to stimulate innate immune cells. High molecular mass hyaluronan is normally present in tissues, but upon inflammation lower molecular mass fragments are generated. It is unclear if these hyaluronan fragments induce an inflammatory response or are a consequence of inflammation. In this study, mouse bone marrow derived macrophages and dendritic cells (DCs) were stimulated with various sizes of hyaluronan from different sources, fragmented hyaluronan, hyaluronidases and heavy chain modified-hyaluronan (HA-HC)...
November 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27859584/oral-administration-of-transgenic-barley-expressing-a-culicoides-allergen-induces-specific-antibody-response
#13
S Jonsdottir, V Svansson, S B Stefansdottir, E Mäntylä, E Marti, S Torsteinsdottir
BACKGROUND: Insect bite hypersensitivity is an IgE-mediated dermatitis of horses initiated by bites of midges of the genus Culicoides. Culicoides spp. are not indigenous to Iceland and the prevalence of insect bite hypersensitivity is much higher in horses born in Iceland and exported as compared to Icelandic horses born in a Culicoides rich environment. Immunotherapy is therefore needed. OBJECTIVES: The aim of the study was to express an allergen from Culicoides in barley grain and investigate whether an immune response could be obtained in healthy Icelandic horses by oral treatment with transgenic barley expressing the allergen...
November 17, 2016: Equine Veterinary Journal
https://www.readbyqxmd.com/read/27855926/sulfated-glycosaminoglycan-derived-oligosaccharides-produced-from-chicken-connective-tissue-promote-iron-uptake-in-a-human-intestinal-caco-2-cell-line
#14
Henan Wang, Mirko Betti
Food grade sulfated glycosaminoglycan (GAG) polysaccharides were successfully extracted from chicken cartilage and skin. Their respective oligosaccharides were obtained by bovine testicular hyaluronidase digestion. The antioxidant capacity was analyzed to determine the possible mechanism explaining how GAGs promote iron uptake by the Caco-2 cells. The sulfated GAG oligosaccharides derived from cartilage possessed the greatest DPPH scavenging and ferric reducing activities (p<0.05), but limited ferrous chelating activities...
April 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/27849353/evaluating-dose-ratio-of-subcutaneous-to-intravenous-immunoglobulin-therapy-among-patients-with-primary-immunodeficiency-disease-switching-to-20-subcutaneous-immunoglobulin-therapy
#15
Girishanthy Krishnarajah, Jee-Yeon K Lehmann, Brian Ellman, Rachel H Bhak, Maral DerSarkissian, Deane Leader, Ann L Bullinger, Mei Sheng Duh
BACKGROUND: Current prescribing information recommends that physicians apply a dose ratio of 1.37:1 (1.53:1 prior to January 2015) in the United States (US) when switching patients with primary immunodeficiency disease (PI) from intravenous (IVIG) therapy to most subcutaneous therapy ([SCIG], except the 10% SCIG human hyaluronidase and immune globulin). However, a dose ratio of 1:1 was studied and approved for the European Union (EU). The dose-adjustment ratio used by prescribers in real-world US clinical practice is unknown...
October 2016: American Journal of Managed Care
https://www.readbyqxmd.com/read/27845895/hyaluronan-activates-hyal-2-wwox-smad4-signaling-and-causes-bubbling-cell-death-when-the-signaling-complex-is-overexpressed
#16
Li-Jin Hsu, Qunying Hong, Shur-Tzu Chen, Hsiang-Lin Kuo, Lori Schultz, John Heath, Sing-Ru Lin, Ming-Hui Lee, Dong-Zhang Li, Zih-Ling Li, Hui-Ching Cheng, Gerard Armand, Nan-Shan Chang
Malignant cancer cells frequently secrete significant amounts of transforming growth factor beta (TGF-β), hyaluronan (HA) and hyaluronidases to facilitate metastasizing to target organs. In a non-canonical signaling, TGF-β binds membrane hyaluronidase Hyal-2 for recruiting tumor suppressors WWOX and Smad4, and the resulting Hyal-2/WWOX/Smad4 complex is accumulated in the nucleus to enhance SMAD-promoter dependent transcriptional activity. Yeast two-hybrid analysis showed that WWOX acts as a bridge to bind both Hyal-2 and Smad4...
November 10, 2016: Oncotarget
https://www.readbyqxmd.com/read/27828933/practical-considerations-for-self-administration-of-subcutaneous-immunoglobulin-g-utilizing-recombinant-human-hyaluronidase-an-advanced-method-of-subcutaneous-administration-a-nurse-s-perspective
#17
Linda K Miars, Michelle Tran, Kimberly Duff
An approved subcutaneous infusion of immunoglobulin G using recombinant human hyaluronidase (IGHy) allows adult patients with primary immunodeficiency disease to self-administer every 3 to 4 weeks using 1 to 2 subcutaneous infusion site(s). This article reviews the practical considerations for nurses to simplify patient education and training. Key considerations include pump choice and parameters, ancillary supplies, and technique. Patient education includes infusion log upkeep and management of potential reactions...
November 2016: Journal of Infusion Nursing: the Official Publication of the Infusion Nurses Society
https://www.readbyqxmd.com/read/27799626/regulation-and-roles-of-the-hyaluronan-system-in-mammalian-reproduction
#18
REVIEW
Ali A Fouladi-Nashta, Kabir A Raheem, Waleed F Marei, Fataneh Ghafari, Geraldine M Hartshorne
Hyaluronan (HA) is a non-sulphated glycosaminoglycan polymer naturally occurring in many tissues and fluids of mammals, including the reproductive system. Its biosynthesis by HA synthase (HAS1-3) and catabolism by hyaluronidases (HYALs) are affected by ovarian steroid hormones. Depending upon its molecular size, HA functions both as a structural component of tissues in the form of high-molecular-weight HA or as a signalling molecule in the form of small HA molecules or HA fragments with effects mediated through interaction with its specific cell-membrane receptors...
February 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/27798230/the-role-of-hyal2-in-lss-induced-glycocalyx-impairment-and-the-pka-mediated-decrease-in-enos-ser633-phosphorylation-and-nitric-oxide-production
#19
Xiangquan Kong, Liang Chen, Peng Ye, Zhimei Wang, Junjie Zhang, Fei Ye, Shaoliang Chen
Hyaluronan (HA) in the endothelial glycocalyx serves as a mechanotransducer for high-shear-stress-stimulated endothelial nitric oxide synthase (eNOS) phosphorylation and nitric oxide (NO) production. Low shear stress (LSS) has been shown to contribute to endothelial inflammation and atherosclerosis by impairing the barrier and mechanotransduction properties of the glycocalyx. Here, we focused on the possible role of hyaluronidase 2 (HYAL2) in LSS-induced glycocalyx impairment and the resulting alterations in eNOS phosphorylation and NO production in human umbilical vein endothelial cells (HUVECs)...
October 26, 2016: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/27790249/cloning-structural-modelling-and-characterization-of-vest2s-a-wasp-venom-hyaluronidase-haase-from-vespa-tropica
#20
Prapenpuksiri Rungsa, Paroonkorn Incamnoi, Sophida Sukprasert, Nunthawun Uawonggul, Sompong Klaynongsruang, Jureerut Daduang, Rina Patramanon, Sittiruk Roytrakul, Sakda Daduang
BACKGROUND: Wasp venom is a complex mixture containing proteins, enzymes and small molecules, including some of the most dangerous allergens. The greater banded wasp (Vespa tropica) is well-known for its lethal venom, whose one of the major components is a hyaluronidase (HAase). It is believed that the high protein proportion and activity of this enzyme is responsible for the venom potency. METHODS: In the present study, cDNA cloning, sequencing and 3D-structure of Vespa tropica venom HAase were described...
2016: Journal of Venomous Animals and Toxins Including Tropical Diseases
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