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https://www.readbyqxmd.com/read/27895468/increased-localized-delivery-of-piroxicam-by-cationic-nanoparticles-after-intra-articular-injection
#1
Sung Rae Kim, Myoung Jin Ho, Sang Hyun Kim, Ha Ra Cho, Han Sol Kim, Yong Seok Choi, Young Wook Choi, Myung Joo Kang
Piroxicam (PRX), a potent nonsteroidal anti-inflammatory drug, is prescribed to relieve postoperative and/or chronic joint pain. However, its oral administration often results in serious gastrointestinal adverse effects including duodenal ulceration. Thus, a novel cationic nanoparticle (NP) was explored to minimize the systemic exposure and increase the retention time of PRX in the joint after intra-articular (IA) injection, by forming micrometer-sized electrostatic clusters with endogenous hyaluronic acid (HA) in the synovial cavity...
2016: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/27877888/lysosomal-ph-inducible-supramolecular-dissociation-of-polyrotaxanes-possessing-acid-labile-n-triphenylmethyl-end-groups-and-their-therapeutic-potential-for-niemann-pick-type-c-disease
#2
Atsushi Tamura, Kei Nishida, Nobuhiko Yui
Niemann-Pick type C (NPC) disease is characterized by the accumulation of cholesterol in lysosomes. We have previously reported that biocleavable polyrotaxanes (PRXs) composed of β-cyclodextrins (β-CDs) threaded onto a linear polymer capped with bulky stopper molecules via intracellularly cleavable linkers show remarkable cholesterol reducing effects in NPC disease patient-derived fibroblasts owing to the stimuli-responsive intracellular dissociation of PRXs and subsequent β-CD release from the PRXs. Herein, we describe a series of novel acid-labile 2-(2-hydroxyethoxy)ethyl group-modified PRXs (HEE-PRXs) bearing terminal N-triphenylmethyl (N-Trt) groups as a cleavable component for the treatment of NPC disease...
2016: Science and Technology of Advanced Materials
https://www.readbyqxmd.com/read/27858147/evolution-and-function-of-the-mycoplasma-hyopneumoniae-peroxiredoxin-a-2-cys-like-enzyme-with-a-single-cys-residue
#3
Taylor Gonchoroski, Veridiana G Virginio, Claudia E Thompson, Jéssica A Paes, Cláudio X Machado, Henrique B Ferreira
The minimal genome of the mollicute Mycoplasma hyopneumoniae, the etiological agent of porcine enzootic pneumonia, encodes a limited repertoire of antioxidant enzymes that include a single and atypical peroxiredoxin (MhPrx), whose evolution and function were studied here. MhPrx has only one catalytic cysteine, in contrast with some of its possible ancestors (2-Cys peroxiredoxins), which have two. Although it is more similar to 2-Cys orthologs, MhPrx can still function with a single peroxidatic cysteine (CysP), using non-thiolic electron donors to reduce it...
November 17, 2016: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/27832933/a-plant-cell-expressed-recombinant-anti-tnf-fusion-protein-is-biologically-active-in-the-gut-and-alleviates-immune-mediated-hepatitis-and-colitis
#4
Yaron Ilan, Svetlana Gingis-Velitski, Ami Ben Ya'aco, Yehudit Shabbat, Lidya Zolotarov, Einat Almon, Yoseph Shaaltiel
: The orally administered BY-2 plant cell-expressed recombinant anti-TNF fusion protein (PRX-106) (n=6) consists of the soluble form of the human TNF receptor (TNFR) fused to the Fc component of a human antibody IgG1 domain. AIM: To evaluate the immune modulatory effect of the oral administration of plant cells expressing PRX-106. METHODS: Mice treated with Concanavalin A (ConA) to induce immune hepatitis was orally treated with cells expressing PRX-106 containing 0...
November 4, 2016: Immunobiology
https://www.readbyqxmd.com/read/27818591/oral-administration-of-a-non-absorbable-plant-cell-expressed-recombinant-anti-tnf-fusion-protein-induces-immunomodulatory-effects-and-alleviates-nonalcoholic-steatohepatitis
#5
Yaron Ilan, Ami Ben Ya'acov, Yehudit Shabbat, Svetlana Gingis-Velitski, Einat Almon, Yoseph Shaaltiel
AIM: To evaluate the immunomodulatory effect of oral administration of PRX-106 in the high-fat diet model. METHODS: For 22 wk, C57BL/6 HFD-fed mice received daily oral treatments with BY-2 cells expressing recombinant anti-tumor necrosis factor alpha fusion protein (PRX-106). Mice were followed for serum liver enzyme and triglyceride levels, liver histology and intrahepatic and systemic FACS. RESULTS: The orally administered non-absorbable PRX-106 was biologically active...
October 21, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27786251/ovariectomy-upregulated-the-expression-of-peroxiredoxin-1-5-in-osteoblasts-of-mice
#6
Juan Du, Wei Feng, Jing Sun, Cuijie Kang, Norio Amizuka, Minqi Li
Peroxiredoxin (PRX), a family of peroxidases, is associated with various biological processes such as the detoxification of oxidants and cell apoptosis. Besides, the anti-apoptosis effect of estrogen results partially from its anti-oxidant function. The purpose of this study was to investigate the expression of PRXs in ovariectomy (OVX) mice and the related anti-oxidative mechanism of estrogen. Eight-week-old mice were subjected to ovariectomy. MC3T3-E1 cells were pretreatment with 17b-estradiol and N-acetyl cysteine followed by oxidative injury induced with H2O2...
October 27, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27770625/mitochondrial-peroxiredoxins-are-essential-in-regulating-the-relationship-between-drosophila-immunity-and-aging
#7
Olena Odnokoz, Kyle Nakatsuka, Vladimir I Klichko, Jacqueline Nguyen, Liz Calderon Solis, Kaitlin Ostling, Marziyeh Badinloo, William C Orr, Svetlana N Radyuk
Previously, we have shown that flies under-expressing the two mitochondrial peroxiredoxins (Prxs), dPrx3 and dPrx5, display increases in tissue-specific apoptosis and dramatically shortened life span, associated with a redox crisis, manifested as changes in GSH:GSSG and accumulation of protein mixed disulfides. To identify specific pathways responsible for the observed biological effects, we performed a transcriptome analysis. Functional clustering revealed a prominent group enriched for immunity-related genes, including a considerable number of NF-kB-dependent antimicrobial peptides (AMP) that are up-regulated in the Prx double mutant...
October 19, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27763573/effect-of-cyclodextrin-types-and-co-solvent-on-solubility-of-a-poorly-water-soluble-drug
#8
Suporn Charumanee, Siriporn Okonogi, Jakkapan Sirithunyalug, Peter Wolschann, Helmut Viernstein
The aim of the study was to investigate the solubility of piroxicam (Prx) depending on the inclusion complexation with various cyclodextrins (CDs) and on ethanol as a co-solvent. The phase-solubility method was applied to determine drug solubility in binary and ternary systems. The results showed that in systems consisting of the drug dissolved in ethanol-water mixtures, the drug solubility increased exponentially with a rising concentration of ethanol. The phase solubility measurements of the drug in aqueous solutions of CDs, β-CD and γ-CD exhibited diagrams of AL-type, whereas 2,6-dimethyl-β-CD revealed AP-type...
October 18, 2016: Scientia Pharmaceutica
https://www.readbyqxmd.com/read/27760964/-a-case-of-early-anal-canal-cancer-with-pagetoid-spread-with-different-antitumor-effects-of-chemotherapy-on-different-metastatic-sites
#9
Kazuhiko Yoshimatsu, Gakuji Osawa, Hajime Yokomizo, Yuki Yano, Sachiyo Okayama, Akiko Sakuma, Masaya Satake, Yasufumi Yamada, Shinichi Asaka, Takebumi Usui, Kentaro Yamaguchi, Shunichi Shiozawa, Takeshi Shimakawa, Takao Katsube, Yoshihiko Naritaka
A 78-year-old man visited our hospital with a prolapsed hemorrhoid. He was referred to the dermatology unit due to the thickness and redness of the perianal skin. He was diagnosed as having extra mammary Paget's disease by skin biopsy. After a biopsy of the anal polyp was performed to investigate the primary site, he was diagnosed with early anal canal cancer with Pagetoid spread and underwent a radical operation. Abdominoperineal resection with skin(D2 prx D3 lymphadenectomy) was performed with perineal reconstruction using a gracilis muscle graft...
October 2016: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/27752237/discovering-antioxidant-molecules-in-the-archaea-domain-peroxiredoxin-bcp1-from-sulfolobus-solfataricus-protects-h9c2-cardiomyoblasts-from-oxidative-stress
#10
Carmen Sarcinelli, Gabriella Fiorentino, Elio Pizzo, Simonetta Bartolucci, Danila Limauro
Peroxiredoxins (Prxs) are ubiquitous thiol peroxidases that are involved in the reduction of peroxides. It has been reported that prokaryotic Prxs generally show greater structural robustness than their eukaryotic counterparts, making them less prone to inactivation by overoxidation. This difference has inspired the search for new antioxidants from prokaryotic sources that can be used as possible therapeutic biodrugs. Bacterioferritin comigratory proteins (Bcps) of the hyperthermophilic archaeon Sulfolobus solfataricus that belong to the Prx family have recently been characterized...
2016: Archaea: An International Microbiological Journal
https://www.readbyqxmd.com/read/27751855/sucrose-delays-senescence-and-preserves-functional-compounds-in-asparagus-officinalis-l
#11
Me-Hea Park
The high metabolic rate of harvested asparagus spears (Asparagus officinalis L.) causes rapid deterioration. To extend shelf life, we investigated the effect of sucrose treatment on asparagus during storage. Asparagus spears were treated with 3%, 5%, and 10% sucrose and stored at 2 °C for 20 h. Cellular respiration decreased, but other processes were unaltered by exogenous sucrose. The overall appearance of asparagus treated with 3% sucrose and stored at 2 °C for 18 days was rated as good and excellent, unlike that of untreated spears...
October 14, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27717466/characterization-of-the-arabidopsis-thaliana-2-cys-peroxiredoxin-interactome
#12
Delphine Cerveau, Alexandra Kraut, Henrik U Stotz, Martin J Mueller, Yohann Couté, Pascal Rey
Peroxiredoxins are ubiquitous thiol-dependent peroxidases for which chaperone and signaling roles have been reported in various types of organisms in recent years. In plants, the peroxidase function of the two typical plastidial 2-Cys peroxiredoxins (2-Cys PRX A and B) has been highlighted while the other functions, particularly in ROS-dependent signaling pathways, are still elusive notably due to the lack of knowledge of interacting partners. Using an ex vivo approach based on co-immunoprecipitation of leaf extracts from Arabidopsis thaliana wild-type and mutant plants lacking 2-Cys PRX expression followed by mass spectrometry-based proteomics, 158 proteins were found associated with 2-Cys PRXs...
November 2016: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/27716839/differences-in-proinflammatory-property-of-six-subtypes-of-peroxiredoxins-and-anti-inflammatory-effect-of-ligustilide-in-macrophages
#13
Li-Xue Zhao, Jun-Rong Du, Hong-Jing Zhou, Dong-Ling Liu, Man-Xia Gu, Fang-Yi Long
BACKGROUND: Peroxiredoxins (Prxs) are proposed to function as damage-associated molecular patterns (DAMPs) and contribute to post-ischemic neuroinflammation and brain injury by activating Toll-like receptor (TLR) 4 at the acute and subacute phases after ischemic stroke. However, there are few studies concerning the inflammatory profiles of six distinct subtypes of Prxs (Prx1-Prx6). Our previous study demonstrated that the protective effect of ligustilide (LIG) against cerebral ischemia was associated with inhibition of neuroinflammatory response and Prx/TLR4 signaling in rats...
2016: PloS One
https://www.readbyqxmd.com/read/27696667/the-anti-ageing-hormone-klotho-induces-nrf2-mediated-antioxidant-defences-in-human-aortic-smooth-muscle-cells
#14
Giuseppe Maltese, Paraskevi-Maria Psefteli, Benedetta Rizzo, Salil Srivastava, Luigi Gnudi, Giovanni E Mann, Richard C M Siow
Vascular ageing in conditions such as atherosclerosis, diabetes and chronic kidney disease, is associated with the activation of the renin angiotensin system (RAS) and diminished expression of antioxidant defences mediated by the transcription factor nuclear factor erythroid 2-related factor 2 (Nrf2). The anti-ageing hormone klotho promotes longevity and protects against cardiovascular and renal diseases. Klotho has been shown to activate Nrf2 and attenuate oxidative damage in neuronal cells, however, the mechanisms by which it protects against vascular smooth muscle cell VSMC dysfunction elicited by Angiotensin II (AngII) remain to be elucidated...
October 3, 2016: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/27660222/expression-of-peroxiredoxins-and-pulmonary-surfactant-protein-a-induced-by-silica-in-rat-lung-tissue
#15
Nan Liu, Ling Xue, Yi Guan, Qing Zhao Li, Fu Yuan Cao, Shu Lan Pang, Wei Jun Guan
Silicosis is one of the most serious occupational diseases in China and dates back to centuries ago. In this study, we successfully established a rat model of silicosis by intratracheal silica injection for 28 days and determined hydroxyproline levels to evaluate collagen metabolism in lung homogenates. Oxidative stress status was evaluated by detecting catalase and glutathione peroxidase activities. Expression levels of peroxiredoxins (Prx I and Prx VI) were detected by Western blotting. Pulmonary surfactant protein A (SP-A) levels in rat serum and lung tissue were analyzed by ELISA, and SP-A and Prx expression levels in lung tissues were detected by immunohistochemistry...
August 2016: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/27650197/pro-apoptotic-effects-of-jda-202-a-novel-natural-diterpenoid-on-esophageal-cancer-through-targeting-peroxiredoxin-i
#16
Xiao-Jing Shi, Lina Ding, Wenjuan Zhou, Yage Ji, Junwei Wang, Huimin Wang, Yongcheng Ma, Guozhong Jiang, Kai Tang, Yu Ke, Wen Zhao, Hong-Min Liu
AIMS: Esophageal carcinoma (EC) is an aggressive malignancy and the most common solid tumor of gastrointestinal tract all over the world, with high incidence in Asia. The current study was designed to investigate the anticancer efficacy and mechanism which is involved in the action of a natural ent-kaurene diterpenoid, JDA-202, targeting EC. RESULTS: We found that an anti-oxidant protein peroxiredoxin I (Prx I) was upregulated in human EC tissues as well as in EC cell lines...
September 21, 2016: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/27643987/effect-of-high-doses-pyrogallol-on-oxidative-damage-transcriptional-responses-and-microcystins-synthesis-in-microcystis-aeruginosa-ty001-cyanobacteria
#17
Jie Wang, Qi Liu, Jia Feng, Jun-Ping Lv, Shu-Lian Xie
Severe eutrophication and harmful cyanobacterial blooms of freshwater ecosystems is a persistent environmental topic in recent decades. Pyrogallol (polyphenol) was confirmed to exhibit one of the most intensive inhibitory effects on the Microcystis aeruginosa. In this study, the expression of genes, release of microcystins (MCs) and antioxidant system of pyrogallol on Microcystis aeruginosa TY001 were investigated. The results revealed that the expression of stress response genes (prx, ftsH, grpE and fabZ) and DNA repair genes (recA and gyrB) were up-regulated...
September 16, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27633575/epigenetic-regulation-of-peroxiredoxins-implications-in-the-pathogenesis-of-cancer
#18
Suet-Hui Ow, Pei-Jou Chua, Boon-Huat Bay
Peroxiredoxin I to VI (PRX I-VI), a family of highly conserved antioxidants, has been implicated in numerous diseases. There have been reports that PRXs are expressed aberrantly in a variety of tumors, implying that they could play an important role in carcinogenesis. Epigenetic mechanisms such as DNA methylation, histone modifications, and microRNAs have been reported to modulate expression of PRXs. In addition, the use of epigenetic regulators, such as histone deacetylases, has been demonstrated to restore PRX to normal levels, indicating that the reversible nature of epigenetics can be exploited for future treatments...
September 15, 2016: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/27632927/genome-wide-association-analysis-reveals-variants-on-chromosome-19-that-contribute-to-childhood-risk-of-chronic-otitis-media-with-effusion
#19
Elisabet Einarsdottir, Lena Hafrén, Eira Leinonen, Mahmood F Bhutta, Erna Kentala, Juha Kere, Petri S Mattila
To identify genetic risk factors of childhood otitis media (OM), a genome-wide association study was performed on Finnish subjects, 829 affected children, and 2118 randomly selected controls. The most significant and validated finding was an association with an 80 kb region on chromosome 19. It includes the variants rs16974263 (P = 1.77 × 10(-7), OR = 1.59), rs268662 (P = 1.564 × 10(-6), OR = 1.54), and rs4150992 (P = 3.37 × 10(-6), OR = 1.52), and harbors the genes PLD3, SERTAD1, SERTAD3, HIPK4, PRX, and BLVRB, all in strong linkage disequilibrium...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27629822/catalytic-thr-or-ser-residue-modulates-structural-switches-in-2-cys-peroxiredoxin-by-distinct-mechanisms
#20
Carlos A Tairum, Melina Cardoso Santos, Carlos A Breyer, R Ryan Geyer, Cecilia J Nieves, Stephanie Portillo-Ledesma, Gerardo Ferrer-Sueta, José Carlos Toledo, Marcos H Toyama, Ohara Augusto, Luis E S Netto, Marcos A de Oliveira
Typical 2-Cys Peroxiredoxins (2-Cys Prxs) reduce hydroperoxides with extraordinary rates due to an active site composed of a catalytic triad, containing a peroxidatic cysteine (CP), an Arg, and a Thr (or Ser). 2-Cys Prx are involved in processes such as cancer; neurodegeneration and host-pathogen interactions. During catalysis, 2-Cys Prxs switch between decamers and dimers. Analysis of 2-Cys Prx structures in the fully folded (but not locally unfolded) form revealed a highly conserved, non-conventional hydrogen bond (CH-π) between the catalytic triad Thr of a dimer with an aromatic residue of an adjacent dimer...
2016: Scientific Reports
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