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hyaluronidase

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https://www.readbyqxmd.com/read/29140867/role-of-hyaluronidase-in-the-treatment-of-hypertrophic-scars
#1
Renata Tabola, Katarzyna Augoff, Krzysztof Grabowski, Roberto Cirocchi
No abstract text is available yet for this article.
November 14, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/29137486/the-arteriolar-glycocalyx-plays-a-role-in-the-regulation-of-blood-flow-in-the-iliac-of-the-anaesthetised-pig
#2
T Ruane-O'Hora, F Markos
The role of the glycocalyx of arterial resistance vessels in regulating blood flow in vivo is not fully understood. Therefore, the effect of glycocalyx damage using two separate compounds, hyaluronidase and N-Formylmethionyl-leucyl-phenylalanine (fMLP), was evaluated in the iliac artery vascular bed of the anaesthetised pig. Blood flow and pressure were measured in the iliac, an adjustable snare was applied to the iliac above the pressure and flow measurement site to induce step decreases (3 occlusions at 3-4 min intervals were performed for each infusion) in blood flow, and hence iliac pressure, and vascular conductance (flow / pressure) was calculated...
November 10, 2017: Physiological Research
https://www.readbyqxmd.com/read/29132826/use-of-chromatographic-and-electrophoretic-tools-for-assaying-elastase-collagenase-hyaluronidase-and-tyrosinase-activity
#3
REVIEW
Syntia Fayad, Philippe Morin, Reine Nehmé
Elastase, collagenase, hyaluronidase and tyrosinase, are very interesting enzymes due to their direct implication in skin aging and as therapeutic hits. Different techniques can be used to study these enzymes and to evaluate the influence of effectors on their kinetics. Nowadays, analytical techniques have become frequently used tools for miniaturizing enzyme assays. The main intention of this article is to review chromatographic and electrophoretic tools that study the four enzymes above mentioned. More specifically, the use of high-performance liquid chromatography and capillary electrophoresis and their derivative techniques for monitoring these enzymes will be investigated...
November 9, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29126233/endothelin-1-promotes-human-germinal-vesicle-stage-oocyte-maturation-by-downregulating-connexin-26-expression-in-cumulus-cells
#4
Long Cui, Jiajie Shen, Li Fang, Xiaodan Mao, Hanzhi Wang, Yinghui Ye
STUDY QUESTION: Does endothelin-1 (ET-1) promote human oocyte maturation and by what mechanism? SUMMARY ANSWER: Addition of ET-1 to the medium in which human germinal vesicle (GV)-stage immature oocytes are cultured enhances the GV breakdown (GVBD) rate; the resumption of meiosis may be initiated by ET-1 downregulating the expression of connexin-26 (Cx26) in cumulus cells via endothelin receptor type B (ETRB), leading to decreased cAMP levels in the oocyte. WHAT IS KNOWN ALREADY: The paracrine factor ET-1 is secreted by ovarian somatic cells in pre-ovulatory follicles and regulates oocyte maturation in mice...
November 8, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/29111978/the-eukaryotic-translation-initiation-factor-eif4e-harnesses-hyaluronan-production-to-drive-its-malignant-activity
#5
Hiba Ahmad Zahreddine, Biljana Culjkovic-Kraljacic, Audrey Emond, Filippa Pettersson, Ronald Midura, Mark Lauer, Sonia Del Rincon, Valbona Cali, Sarit Assouline, Wilson H Miller, Vincent Hascall, Katherine Borden
The microenvironment provides a functional substratum supporting tumour growth. Hyaluronan (HA) is a major component of this structure. While the role of HA in malignancy is well-defined, the mechanisms driving its biosynthesis in cancer are poorly understood. We show that the eukaryotic translation initiation factor eIF4E, an oncoprotein, drives HA biosynthesis. eIF4E stimulates production of enzymes that synthesize the building blocks of HA, UDP-Glucuronic acid and UDP-N-Acetyl-Glucosamine, as well as hyaluronic acid synthase which forms the disaccharide chain...
November 7, 2017: ELife
https://www.readbyqxmd.com/read/29107670/new-findings-from-the-first-transcriptome-of-the-bothrops-moojeni-snake-venom-gland
#6
Fernanda Gobbi Amorim, Romualdo Morandi-Filho, Patricia Tieme Fujimura, Carlos Ueira-Vieira, Suely Vilela Sampaio
Snakebites are a serious health problem in tropical countries. In Brazil, the genus Bothrops (Viperidae family) causes most of the ophidic accidents, characterized by proteolysis and haemorrhage. Snake venoms are rich sources of toxins with great therapeutic and biotechnological potential and omics approaches is a valuable tool for identification of new bioactive components in the venom. In this study, we described the first transcriptome of the venom gland of Bothrops moojeni snake, using the next-generation sequencing with the Illumina platform...
October 28, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/29077179/hyaluronidase-injection-for-improved-tissue-dissection-in-baerveldt-tube-surgery
#7
Alon Zahavi, John R Grigg
PURPOSE: To describe a novel technique for tissue dissection during Baerveldt tube surgery. METHODS: We present a technique for posterior dissection of conjunctiva and Tenon tissue for the placement of a glaucoma drainage device. Hyaluronidase is used in the early stages of surgery in order to minimize tissue trauma and facilitate easy dissection even through existing adhesions and conjunctival scarring. RESULTS: The technique facilitates convenient dissection through tissues...
October 16, 2017: European Journal of Ophthalmology
https://www.readbyqxmd.com/read/29063508/age-related-changes-in-cyclic-phosphatidic-acid-induced-hyaluronic-acid-synthesis-in-human-fibroblasts
#8
Katsura Sano, Mari Gotoh, Kyoko Dodo, Noriaki Tajima, Yoshibumi Shimizu, Kimiko Murakami-Murofushi
Hyaluronic acid is a major component of the extracellular matrix, which is important for skin hydration. As aging brings skin dehydration, we aimed to clarify the mRNA expression of hyaluronic acid-related proteins in human skin fibroblasts from donors of various ages (range 0.7-69 years). Previously, we reported that cyclic phosphatidic acid (cPA), a unique phospholipid mediator, stimulated the expression of HAS2 and increased hyaluronic acid synthesis in human skin fibroblasts (donor age: 3 days). In this study, we measured the mRNA expression of hyaluronic acid-related proteins: hyaluronan synthase (HAS) 1-3, hyaluronidase-1, -2, and hyaluronic acid-binding protein (versican)...
October 23, 2017: Human Cell
https://www.readbyqxmd.com/read/29062200/cloning-and-sequence-analysis-of-hyaluronoglucosaminidase-nagh-gene-of-clostridium-chauvoei
#9
Saroj K Dangi, Pavan Kumar Yadav, Aakanksha Tiwari, Viswas Konasagara Nagaleekar
AIM: Blackleg disease is caused by Clostridium chauvoei in ruminants. Although virulence factors such as C. chauvoei toxin A, sialidase, and flagellin are well characterized, hyaluronidases of C. chauvoei are not characterized. The present study was aimed at cloning and sequence analysis of hyaluronoglucosaminidase (nagH) gene of C. chauvoei. MATERIALS AND METHODS: C. chauvoei strain ATCC 10092 was grown in ATCC 2107 media and confirmed by polymerase chain reaction (PCR) using the primers specific for 16-23S rDNA spacer region...
September 2017: Veterinary World
https://www.readbyqxmd.com/read/29056077/halo-109-301-a-phase-iii-trial-of-pegph20-with-gemcitabine-and-nab-paclitaxel-in-hyaluronic-acid-high-stage-iv-pancreatic-cancer
#10
Gary J Doherty, Margaret Tempero, Pippa G Corrie
The outlook for patients with advanced pancreatic cancer remains poor, despite significant advances in our understanding of pancreatic tumor biology. One emerging theme highlights the distinct composition of the pancreatic tumor microenvironment. Hyaluronic acid is a hydrophilic glycosaminoglycan whose production within the tumor leads to increased interstitial tumor pressure, thereby limiting the access of potentially effective circulating anticancer drugs via reduced tumor perfusion. PEGylated rHuPH20 is a multiply PEGylated recombinant human hyaluronidase that has shown promising efficacy in preclinical models and early phase clinical trials in pancreatic cancer patients...
October 23, 2017: Future Oncology
https://www.readbyqxmd.com/read/29053033/hyaluronidase-allergy-mimicking-orbital-cellulitis
#11
Nirav D Raichura, Md Shahid Alam, V V Jaichandran, Saurabh Mistry, Bipasha Mukherjee
PURPOSE: Hyaluronidase enzyme is a common additive with local anesthetic agent to facilitate faster permeation of the anesthetic in periocular tissues during ophthalmic surgery. We report a series of five subjects presenting with clinical features mimicking orbital cellulitis following peribulbar anesthesia and consequently diagnosed with hyaluronidase hypersensitivity. SETTING: The study was conducted at a tertiary eye care center in Southern India. DESIGN: It was a retrospective interventional case series...
October 20, 2017: Orbit
https://www.readbyqxmd.com/read/29051603/quantitative-assessment-of-the-blood-brain-barrier-opening-caused-by-streptococcus-agalactiae-hyaluronidase-in-a-balb-c-mouse-model
#12
Su Luo, Qing Cao, Ke Ma, Zhaofei Wang, Guangjin Liu, Chengping Lu, Yongjie Liu
Streptococcus agalactiae is a pathogen causing meningitis in animals and humans. However, little is known about the entry of S. agalactiae into brain tissue. In this study, we developed a BALB/c mouse model based on the intravenous injection of β-galactosidase-positive Escherichia coli M5 as an indicator of blood-brain barrier (BBB) opening. Under physiological conditions, the BBB is impermeable to E. coli M5. In pathological conditions caused by S. agalactiae, E. coli M5 is capable of penetrating the brain through a disrupted BBB...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29039154/severe-headache-following-ozone-therapy-pneumocephalus
#13
Hüseyin Toman, Uğur Özdemir, Hasan Ali Kiraz, Nurettin Lüleci
Pneumocephalus is defined as air in the cranial cavity. Pneumocephalus can result from inadvertent dural puncture during lumbar epidural anesthesia or epidural steroid injection. Presently described is case of 41-year-old woman who had undergone lumbar disc hernia operation but due to ongoing complaints, was diagnosed as having failed back surgery syndrome. Percutaneous epidural neuroplasty was performed. In the operating room, under sterile conditions and under sedoanalgesia, Racz catheter was inserted in caudal area and guided to epidural area with scope...
July 2017: Aǧrı: Ağrı (Algoloji) Derneği'nin Yayın Organıdır, the Journal of the Turkish Society of Algology
https://www.readbyqxmd.com/read/29037686/identification-and-biological-activities-of-carotenoids-from-the-freshwater-alga-oedogonium-intermedium
#14
Na Wang, Yuki Manabe, Tatsuya Sugawara, Nicholas A Paul, Jian Zhao
The chemical and biological properties of carotenoids in the freshwater alga Oedogonium intermedium were investigated in this study. Carotenoids were extracted from the alga by dichloromethane and purified by saponification. The carotenoid content was determined both spectrometrically and by HPLC, the carotenoids identified by HPLC-PDA-APCI-IT-TOF-MS and the extracts analysed for several health-related bioactivities. The crude and saponified extracts contained 3,411.2±20.7 and 2,929.6±5.9µg carotenoids/g dry algal biomass, respectively...
March 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29026428/evaluation-of-the-physiological-activity-of-venom-from-the-eurasian-water-shrew-neomys-fodiens
#15
Krzysztof Kowalski, Paweł Marciniak, Grzegorz Rosiński, Leszek Rychlik
BACKGROUND: Animal toxins can have medical and therapeutic applications. Principally, toxins produced by insects, arachnids, snakes and frogs have been characterized. Venomous mammals are rare, and their venoms have not been comprehensively investigated. Among shrews, only the venom of Blarina brevicauda has been analysed so far, and blarina toxin has been proven to be its main toxic component. It is assumed that Neomys fodiens employs its venom to hunt larger prey. However, the toxic profile, properties and mode of action of its venom are largely unknown...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/29025219/commentary-on-new-high-dose-pulsed-hyaluronidase-protocol-for-hyaluronic-acid-filler-vascular-adverse-events
#16
Jonathan M Sykes
No abstract text is available yet for this article.
July 1, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/29024043/proteomic-analysis-of-the-venom-of-the-predatory-ant-pachycondyla-striata-hymenoptera-formicidae
#17
Pollyanna Pereira Santos, Patricia Dias Games, Dihego Oliveira Azevedo, Edvaldo Barros, Leandro Licursi de Oliveira, Humberto Josué de Oliveira Ramos, Maria Cristina Baracat-Pereira, José Eduardo Serrão
The ants use their venom for predation, defense, and communication. The venom of these insects is rich in peptides and proteins, and compared with other animal venoms, ant venoms remain poorly explored. The objective of this study was to evaluate the protein content of the venom in the Ponerinae ant Pachycondyla striata. Venom samples were collected by manual gland reservoir dissection, and samples were submitted to two-dimensional gel electrophoresis and separation by ion-exchange and reverse-phase high-performance liquid chromatography followed by mass spectrometry using tanden matrix-assisted laser desorption/ionization with time-of-flight (MALDI-TOF/TOF) mass spectrometry and electrospray ionization-quadrupole with time-of-flight (ESI-Q/TOF) mass spectrometry for obtaining amino acid sequence...
November 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/29019024/naphthalene-glycosides-in-the-thai-medicinal-plant-diospyros-mollis
#18
Takaharu Suwama, Keisuke Watanabe, Orawan Monthakantirat, Prathan Luecha, Hiroshi Noguchi, Kenji Watanabe, Kaoru Umehara
This study evaluated methanol extracts from the leaves and branches of the Thai medicinal plant Diospyros mollis (Ebenaceae). Seven triterpenes and 22 aromatic compounds, including five new compounds, were isolated, and their structures were determined. The new compounds had the following structures: diospyrol glycoside (makluoside A, 1), 8,8'-di-O-6-β-D-apiofuranosyl-β-D-glucopyranosyl-6,6'-dimethyl-2,3'-binaphthalene-1-ol-1',4'- dione (makluoside B, 2), and 3-methyl-1,8- naphthalenediol glycosides (makluosides C-E, 3-5)...
October 10, 2017: Journal of Natural Medicines
https://www.readbyqxmd.com/read/28989011/isoflavonoids-as-wound-healing-agents-from-ononidis-radix
#19
Burçin Ergene Öz, Gülçin Saltan İşcan, Esra Küpeli Akkol, İpek Süntar, Özlem Bahadır Acıkara
ETHNOPHARMACOLOGICAL RELEVANCE: Dried roots of Ononis spinosa L. are traditionally used for their diuretic, anti-inflammatory and wound healing effects. AIM OF THE STUDY: Isolation of the bioactive compounds of Ononis spinosa L. subsp. leiosperma (Boiss.) Sirj. MATERIALS AND METHODS: Ethyl acetate extract prepared from the roots of Ononis spinosa L. subsp. leiosperma (Boiss.) Sirj. was subjected to silica gel column. The fractions were tested for their wound healing and anti-inflammatory activities...
October 6, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28985851/in-bag-enzymatic-splenic-digestion-a-novel-alternative-to-manual-morcellation
#20
Eric D Villarreal, William Preston Hewgley, Walter H Lang, Christopher L Morton, Shenghua Mao, Jianrong Wu, John A Sandoval
BACKGROUND: Contained in-bag spleen morcellation is a conventional extraction technique for safe spleen removal during laparoscopic splenectomy. Existing data for the use of in-bag enzymatic splenic digestion as an alternative to morcellation are lacking. This proof-of-concept study sought to evaluate the effectiveness of single and combinatorial enzyme digestion of murine spleens. MATERIALS AND METHODS: Murine spleens were digested with collagenase alone or with combinations of commercially available enzymes (collagenase, elastase, hyaluronidase, neutral protease) to determine their degradation effect...
October 2017: Journal of Surgical Research
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