Read by QxMD icon Read


Jesper Brink Svendsen, Bo Baslund, Elisabeth Præstekjær Cramer, Nicolas Rapin, Niels Borregaard, Jack Bernard Cowland
Jumonji Domain-Containing Protein 3 (JMJD3)/lysine demethylase 6B (KDM6B) is an epigenetic modulator that removes repressive histone marks on genes. Expression of KDM6B mRNA is elevated in leukocytes from patients with ANCA-associated vasculitis (AAV) and has been suggested to be the reason for higher proteinase 3 (PR3) mRNA expression in these cells due to derepression of PRTN3 gene transcription. MicroRNA-941 (miR-941) has been shown to target KDM6B mRNA and inhibit JMJD3 production. We therefore investigated whether polymorphonuclear granulocytes (PMNs) from patients suffering from granulomatosis with polyangiitis (GPA) have lower expression of miR-941 than healthy control donors as a biological cause for higher JMJD3 levels...
2016: PloS One
Jiajin Yang, Heng Ge, Caroline J Poulton, Susan L Hogan, Yichun Hu, Britta E Jones, Candace D Henderson, Elizabeth A McInnis, William F Pendergraft, J Charles Jennette, Ronald J Falk, Dominic J Ciavatta
BACKGROUND: Anti-neutrophil cytoplasmic autoantibody (ANCA)-associated vasculitis (AAV) is a systemic autoimmune disease characterized by destructive vascular inflammation. Two prominent ANCA autoantigens are myeloperoxidase (MPO) and proteinase 3 (PR3), and transcription of MPO and PRTN3, the genes encoding the autoantigens, is associated with disease activity. We investigated whether patients with AAV have alterations in histone modifications, particularly those associated with transcriptional activation, at MPO and PRTN3...
2016: Clinical Epigenetics
Eline Houben, Willem A Bax, Bastiaan van Dam, Walentina A T Slieker, Gideon Verhave, Fenneke C P Frerichs, Izhar C van Eijk, Wim G Boersma, Guido T M de Kuyper, Erik L Penne
Currently no validated diagnostic system for antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) is available. Therefore, diagnosing AAV is often challenging. We aimed to identify factors that lead to a clinical diagnosis AAV in ANCA positive patients in a teaching hospital in The Netherlands.In this study, all patients that tested positive for ANCA proteinase 3 (PR3) and/or myeloperoxidase (MPO) between 2005 and 2015 were analysed. Patients with a clinical diagnosis of AAV were compared with patients without a clinical diagnosis of AAV...
October 2016: Medicine (Baltimore)
Antonio Mazzella, Anne Olland, Pierre Emmanuel Falcoz, Stephane Renaud, Nicola Santelmo, Gilbert Massard
BACKGROUND: This study evaluates the number of video-assisted thoracic surgery-lobectomies (VATS-lobectomies) required for an experienced consultant thoracic surgeon to obtain competence and to perform standard quality surgery. METHODS: We have analysed the initial VATS-experience (January 2012 to September 2014) of a confirmed senior consultant who has performed 145 consecutive anatomic resections by thoracoscopy. After excluding bilobectomies, segmentectomies, and lobectomies for infectious disease, we have focused into 119 consecutive lobectomies, classified into 4 chronologic groups of 30 each...
September 2016: Journal of Thoracic Disease
Shinya Kawamoto, Ryo Koda, Atsunori Yoshino, Tetsuro Takeda, Yoshihiko Ueda
Medullary cystic kidney disease (MCKD) is a hereditary disease associated with bilateral medullary polycysts and interstitial fibrosis. MCKD is typically associated with slowly progressive renal dysfunction. We herein report two rare elderly cases with enlarged kidneys and rapidly progressive renal dysfunction without myeloperoxidase anti-neutrophil cytoplasmic antibody (MPO-ANCA), PR3-ANCA, or anti-glomerular basement membrane (GBM) antibodies. Renal biopsies revealed extensive tubular dilatation and atrophy with interstitial fibrosis consistent with MCKD...
2016: Internal Medicine
Xiao-Yan Yi, Yao Wang, Qi-Fu Li, Rong Li, Shu-Min Yang, Guo-Qing Zhou, Zhi-Hong Wang
BACKGROUND: Propylthiouracil is the most common drug used to treat hyperthyroidism. However, this drug could cause a severe disease, antineutrophilic cytoplasmic antibody-associated vasculitis (AAV), which was usually misdiagnosed. METHODS: We reported a 60-year-old woman of propylthiouracil-induced AAV manifested as blood coagulation disorders. The patient was admitted because of hyperthyroidism and leukopenia. At the time of hospitalization, she suffered from dry cough, erythema and knee joints ache, and gradually became febrile...
October 2016: Medicine (Baltimore)
Christian Pagnoux
Antineutrophil cytoplasm antibody (ANCA)-associated vasculitides are small-vessel vasculitides that include granulomatosis with polyangiitis (formerly Wegener's granulomatosis), microscopic polyangiitis, and eosinophilic granulomatosis with polyangiitis (Churg-Strauss syndrome). Renal-limited ANCA-associated vasculitides can be considered the fourth entity. Despite their rarity and still unknown cause(s), research pertaining to ANCA-associated vasculitides has been very active over the past decades. The pathogenic role of antimyeloperoxidase ANCA (MPO-ANCA) has been supported using several animal models, but that of antiproteinase 3 ANCA (PR3-ANCA) has not been as strongly demonstrated...
September 2016: Eur J Rheumatol
María Batuecas, Ruth Castro-Rodrigo, Miguel A Esteruelas, Cristina García-Yebra, Ana M López, Enrique Oñate
The aromatic osmacyclopropenefuran bicycles [OsTp{κ(3) -C(1) ,C(2) ,O-(C(1) H2 C(2) CHC(OEt)O)}(P(i) Pr3 )]BF4 (Tp=hydridotris(1-pyrazolyl)borate) and [OsH{κ(3) -C(1) ,C(2) ,O-(C(1) H2 C(2) CHC(OEt)O)}(CO)(P(i) Pr3 )2 ]BF4 , with the metal fragment in a common vertex between the fused three- and five-membered rings, have been prepared via the π-allene intermediates [OsTp(η(2) -CH2 =CCHCO2 Et)(OCMe2 )(P(i) Pr3 )]BF4 and [OsH(η(2) -CH2 =CCHCO2 Et)(CO)(OH2 )(P(i) Pr3 )2 ]BF4 , and their aromaticity analyzed by DFT calculations...
October 4, 2016: Angewandte Chemie
Shinichiro Okauchi, Tomohiro Tamura, Katsunori Kagohashi, Mio Kawaguchi, Hiroaki Satoh
A 71-year-old woman with arthralgia and lung fibrosis was referred to Mito Kyodo General Hospital (Mito, Japan) for a mass, which was incidentally observed on a chest radiograph. The chest computed tomography scan demonstrated fibrotic lesions in the lower lobes of the lung and a nodule in the left upper lobe. The serum levels of myeloperoxidase (MPO)-anti-neutrophil cytoplasmic antibody (ANCA) and proteinase 3 (PR3)-ANCA were 60.3 and 7.5 U/ml, respectively. A transbronchial biopsy obtained from the nodule in the left upper lobe of the lung revealed a lung adenocarcinoma and the patient underwent standard upper lobectomy of the left lung...
October 2016: Biomedical Reports
Marcin Surmiak, Marek Sanak
BACKGROUND: One of characteristic findings in granulomatosis with polyangiitis (GPA) is the presence of proteinase-3 (anti-PR3) specific antibodies. These antibodies can cause neutrophil activation, degranulation and generation of reactive oxygen species (ROS). Each of these inflammatory events can be suppressed by circulating alpha-1 antitrypsin (A1AT). A1AT is an acute phase protein increasing during inflammation, however, it may circulate as an inactive polymeric protein. AIM OF THE STUDY: The aim was to analyze how different types of A1AT can affect anti-PR3 mediated neutrophil activation...
August 5, 2016: Pharmacological Reports: PR
Amandine Tubery, Françoise Fortenfant, Bernard Combe, Isabelle Abreu, Xavier Bossuyt, Pascale Chretien, Sophie Desplat-Jégo, Nicole Fabien, Sophie Hue, Catherine Johanet, Daniela Lakomy, Thierry Vincent, Claire I Daïen
We report here the case of a 50-years-old man treated for mixed connective tissue disease (MCTD) positive for anti-U1 ribonucleoprotein (U1RNP) antibodies who secondarily developed a granulomatosis with polyangiitis (GPA) associated with anti-proteinase 3 anti-neutrophil cytoplasmic antibodies (PR3-ANCA). We then evaluated the frequency of the association between anti-U1RNP and anti-PR3-ANCA antibodies by a systematic retrospective study in ten European hospitals. Overall, out of 11,921 samples analyzed for both auto-antibodies, 18 cases of anti-U1RNP and anti-PR3-ANCA double positivity were found and only one patient presented with both MCTD and GPA symptoms...
September 12, 2016: Immunologic Research
Molly M H Sung, Robert H Morris
The acid dissociation constant Ka of a transition-metal hydride complex is a key thermodynamic quantity for evaluating reactivity and stability of the complexes and their conjugate bases in stoichiometric and catalytic reactions. It can be estimated using a simple ligand acidity constant (LAC) empirical equation for a wide range of complexes. Here, we provide the first density functional theory (DFT) study that supports the additive nature of ligand contributions to the pKa of metal hydride complexes. Specifically, the pKa values of iron hydride complexes [FeH(CO)x(PR3)(5-x)](+) in either tetrahydrofuran or dichloromethane solutions are estimated using the LAC method and DFT calculations...
October 3, 2016: Inorganic Chemistry
Jeffrey S Quesnel, Salvador Moncho, Kai E O Ylijoki, Gerardo Martin Torres, Edward N Brothers, Ashfaq A Bengali, Bruce A Arndtsen
We describe herein computational studies on the unusual ability of Pd(PtBu3 )2 to catalyze formation of highly reactive acid chlorides from aryl halides and carbon monoxide. These show a synergistic role of carbon monoxide in concert with the large cone angle PtBu3 that dramatically lowers the barrier to reductive elimination. The tertiary structure of the phosphine is found to be critical in allowing CO association and the generation of a high energy, four coordinate (CO)(PR3 )Pd(COAr)Cl intermediate. The stability of this complex, and the barrier to elimination, is highly dependent upon phosphine structure, with the tertiary steric bulk of PtBu3 favoring product formation over other ligands...
October 10, 2016: Chemistry: a European Journal
Alexandre Valayer, Deborah Brea, Laurie Lajoie, Leslie Avezard, Lucie Combes-Soia, Valerie Labas, Brice Korkmaz, Gilles Thibault, Thomas Baranek, Mustapha Si-Tahar
Polymorphonuclear neutrophils (PMNs) can contribute to the regulation of the host immune response by crosstalk with innate and adaptive leukocytes, including NK cells. Mechanisms by which this immunoregulation process occurs remain incompletely understood. Here, we focused on the effect of human neutrophil-derived serine proteases on NKp46, a crucial activating receptor expressed on NK cells. We used flow cytometry, Western blotting, and mass spectrometry (MS) analysis to reveal that cathepsin G [CG; and not elastase or proteinase 3 (PR3)] induces a time- and concentration-dependent, down-regulatory effect on NKp46 expression through a restricted proteolytic mechanism...
September 1, 2016: Journal of Leukocyte Biology
Skylar J Ferrara, Bo Wang, Elaine Haas, Karry Wright LeBlanc, Joel T Mague, James P Donahue
The mononuclear Cu(I) complexes [LCu(I)(SSi(i)Pr3)] (L = 1,1,1-tris(diphenylphosphinomethyl)ethane (triphos), 1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene (IMes)) have been prepared by ligand displacement from [LCu(I)Cl] with (i)Pr3SiS(-). Both compounds are colorless, diamagnetic species and have been characterized structurally by X-ray crystallography. The compounds [(IMes)Cu(η(1)κ(S)-SC(O)CH3)] and [(triphos)Cu(η(1)κ(S)-SC(S)OCH3)] have been prepared in the context of synthesis aimed at [LCu(η(1)κ(S)-SCOS)] and [LCu(η(1)κ(S)-SCS2)] complexes, which are intended as synthons toward an analogue of the Mo(μ-OSCO)Cu intermediate proposed as occurring in the catalytic cycle of carbon monoxide dehydrogenase (CODH)...
September 19, 2016: Inorganic Chemistry
Hamish J Farquhar, Ben McGettigan, Peter T Chapman, John L O'Donnell, Chris Frampton, Lisa K Stamp
OBJECTIVE: To determine the incidence of ANCA Associated Vasculitis (AAV) during the 3-year period before (period 1), and the 3 years following (period 2), the earthquake that occurred on 22 February 2011 in Christchurch, New Zealand. METHODS: All ANCA tests performed in the Canterbury region for 3 years before the earthquake (period one, 2007-2010), and for 3 years after the earthquake (period two, 2011-2014) were examined. AAV was defined according to The European Medicines Agency classification algorithm...
August 30, 2016: Internal Medicine Journal
Guiyi Ji, Xuemei Zeng, Andrew J Sandford, Jian-Qing He
Antineutrophil cytoplasm antibody (ANCA)-associated vasculitis (AAV) is a pauci-immune necrotizing vasculitis that involves small vessels. Herein, we report an extremely rare case of rifampicin (RFP)-induced AAV. A 42-yearold female was transferred to the West China Hospital due to cough with phlegm for 3 months, fever for 1 month, and fatigue for 2 weeks. The patient was diagnosed with pulmonary tuberculosis (TB) and received anti-TB treatment with isoniazid, RFP, ethambutol, and pyrazinamide (PZA) at her local hospital...
October 2016: International Journal of Clinical Pharmacology and Therapeutics
Emanuel Della-Torre, Marco Lanzillotta, Corrado Campochiaro, Emanuele Bozzalla, Enrica Bozzolo, Alessandro Bandiera, Elena Bazzigaluppi, Carla Canevari, Giulio Modorati, John H Stone, Angelo Manfredi, Claudio Doglioni
BACKGROUND: IgG4-related disease (IgG4-RD) is a fibroinflammatory condition characterized by serum IgG4 elevation and tissue infiltration of IgG4-positive plasma cells. Substantial overlap between IgG4-RD and antineutrophil cytoplasmic antibodies (ANCA)-associated vasculitides (AAV) exists in terms of organ involvement and histopathological features. A positive ANCA assay is regarded as a highly specific finding in favor of an AAV, and generally influences away from a diagnosis of IgG4-RD...
August 2016: Medicine (Baltimore)
Manfred Relle, Bernd Föhr, Federica Fasola, Andreas Schwarting
Granulomatosis with polyangiitis (GPA) is a severe autoimmune disease and one of the small vessel anti-neutrophil cytoplasmic antibody (ANCA)-associated vasculitides. Although its etiology and pathophysiology are still widely unknown, it is accepted that infections, environmental factors, epigenetic modifications, and a genetic predisposition provide the basis for this systemic disorder. GPA typically evolves into two phases: an initial phase characterized by ear, nose and throat (ENT) manifestations, such as chronic sinusitis and otitis, ulceration of the oral cavity and pharynx, as well as pulmonary nodules and a severe generalized phase, defined by the occurrence of rapidly progressive glomerulonephritis, pulmonary hemorrhage, and arthritis...
August 21, 2016: Molecular and Cellular Probes
Ralph Kettritz
Neutrophil serine proteases (NSPs) exercise tissue-degrading and microbial-killing effects. The spectrum of NSP-mediated functions grows continuously, not least because of methodological progress. Sensitive and specific FRET substrates were developed to study the proteolytic activity of each NSP member. Advanced biochemical methods are beginning to characterize common and specific NSP substrates. The resulting novel information indicates that NSPs contribute not only to genuine inflammatory neutrophil functions but also to autoimmunity, metabolic conditions, and cancer...
September 2016: Immunological Reviews
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"