نتایج جستجو برای: mgxni1 xo

تعداد نتایج: 1552  

Journal: :Polish journal of pharmacology 2003
Bülent Aktan Seyithan Taysi Kenan Gümüştekin Harun Uçüncü Ramazan Memişoğullari Kürşad Save Nuri Bakan

Although the long-term administrations of macrolide antibiotics are effective for diffuse panbronchiolitis, otitis media with effusion (OME), and some other diseases, their mechanism of action has not been fully understood. In order to elucidate the mechanisms of possible effects of macrolide antibiotics on activities of erythrocyte nitric oxide synthase (NOS), xanthine oxidase (XO), and malond...

2018
Stanisław Zajączkowski Wiesław Ziółkowski Piotr Badtke Miłosz A Zajączkowski Damian J Flis Adam Figarski Maria Smolińska-Bylańska Tomasz H Wierzba

BACKGROUND It has long been suggested that reactive oxygen species (ROS) play a role in oxygen sensing via peripheral chemoreceptors, which would imply their involvement in chemoreflex activation and autonomic regulation of heart rate. We hypothesize that antioxidant affect neurogenic cardiovascular regulation through activation of chemoreflex which results in increased control of sympathetic m...

Journal: :Infection and immunity 1997
K Umezawa T Akaike S Fujii M Suga K Setoguchi A Ozawa H Maeda

The role of superoxide anion (O2-) and nitric oxide (NO) in the host defense mechanism against Salmonella typhimurium (LT-2) was examined by focusing on xanthine oxidase (XO) as an O2(-)-generating system and on inducible NO synthase (iNOS). When ICR mice were infected with a 0.1 50% lethal dose (2 x 10(5) CFU) of S. typhimurium, bacterial growth in the liver reached a peak value 3 days after i...

Journal: :Journal of andrology 2003
Julie Baumber Barry A Ball Jennifer J Linfor Stuart A Meyers

The objective of this study was to examine the effect of reactive oxygen species (ROS) and cryopreservation on DNA fragmentation of equine spermatozoa. In experiment 1, equine spermatozoa were incubated (1 hour, 38 degrees C) according to the following treatments: 1) sperm alone; 2) sperm + xanthine (X, 0.3 mM)-xanthine oxidase (XO, 0.025 U/mL); 3) sperm + X (0.6 mM)-XO (0.05 U/mL); and 4) sper...

2012
M. Lafourcade

Let k 3 0 be arbitrary. In [28], it is shown that there exists a completely empty real, Riemannian ideal. We show that exp ( I ) < tanh (D) ∪ Λ (0P ) . It has long been known that XO is equal to fd,g [28]. We wish to extend the results of [25] to linear equations.

2007
Peter R. McCullough Christopher J. Burke

We describe strategies and tactics for detecting transiting planets, as learned from the experience of the XO Project. A key component is the web-enabled collaboration with a longitudinally-distributed Extended Team of dedicated volunteers operating small-aperture telescopes near their homes. We also quantify the (small) potential to discover transiting planets of M dwarfs from existing data su...

Journal: :The Journal of biological chemistry 1987
K J Davies A L Goldberg

Exposure of red blood cells to oxygen radicals can induce hemoglobin damage and stimulate protein degradation, lipid peroxidation, and hemolysis. To determine if these events are linked, rabbit erythrocytes were incubated at 37 degrees C with various oxygen radical-generating systems and antioxidants. Protein degradation, measured by the production of free alanine, increased more than 11-fold i...

Journal: :The Journal of biological chemistry 1992
J Hunt V Massey

Milk xanthine oxidase (XO) has been prepared in a dehydrogenase form (XDH) by purifying the enzyme in the presence of 2.5 mM dithiothreitol. Unlike XO, which reacts rapidly only with oxygen and not with NAD, the XDH form of the enzyme reacts rapidly with NAD. XDH has a turnover number for the NAD-dependent conversion of xanthine to urate of 380 mol/min/mol at pH 7.5, 25 degrees C, with a Km = <...

Journal: :Chinese medical sciences journal = Chung-kuo i hsueh k'o hsueh tsa chih 2014
Wei-qing Lin Jian-xiang Xie Xiao-mu Wu Lin Yang Hai-dong Wang

OBJECTIVE To evaluate the inhibitory effect of Gnaphalium affine extracts on xanthine oxidase (XO) activity in vitro and to analyze the mechanism of this effect. METHODS In this in vitro study, Kinetic measurements were performed in 4 different inhibitor concentrations and 5 different xanthine concentrations (60, 100, 200, 300, 400 Μmol/L). Dixon and Lineweaver-Burk plot analysis were used to...

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