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https://www.readbyqxmd.com/read/28319294/activation-of-sf6-at-platinum-complexes-formation-of-sf3-derivatives-and-their-application-in-deoxyfluorination-reactions
#1
Claudia Berg, Thomas Braun, Mike Ahrens, Philipp Wittwer, Roy Herrmann
The activation of SF6 at [Pt(PR3 )2 ] R=Cy, iPr complexes in the presence of PR3 led selectively and in an unprecedented reaction route to the generation of the SF3 complexes trans-[Pt(F)(SF3 )(PR3 )2 ]. These can also be synthesized from SF4 and the SF2 derivative trans-[Pt(F)(SF2 )(PCy3 )2 ][BF4 ] was characterized by X-ray crystallography. trans-[Pt(F)(SF3 )(PR3 )2 ] complexes are useful tools for deoxyfluorination reactions and novel fluorido complexes bearing a SOF ligand are formed. Based on these studies a process for the deoxyfluorination of ketones was developed with SF6 as fluorinating agent...
March 20, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28291538/-pyoderma-gangrenosum-associated-with-anti-proteinase-3%C3%A2-antineutrophil-cytoplasmic-antibodies-pr3-anca-induced-by-propylthiouracil
#2
A Coster, J-L Dargent, N de Visscher, P Levecque, P-P Roquet-Gravy
BACKGROUND: Synthetic antithyroid drugs are often used in the treatment of hyperthyroidism, regardless of aetiology. They may cause various side effects, including the development of anti-neutrophil cytoplasmic antibodies (ANCA), ANCA-associated vasculitis, and neutrophilic dermatoses. Propylthiouracil (PTU) is the antithyroid drug most frequently implicated in ANCA-associated diseases specifically involving anti-myeloperoxidase ANCA (MPO-ANCA). To our knowledge, there are no clinical reports describing the association of pyoderma gangrenosum (PG) and anti-proteinase3-ANCA (PR3-ANCA) induced by PTU, with ANCA levels decreasing after antithyroid drug withdrawal...
March 10, 2017: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/28276554/1-8-bis-silylamido-naphthalene-complexes-of-magnesium-and-zinc-synthesised-through-alkane-elimination-reactions
#3
Mark A Bradley, Chris Birchall, Alexander J Blake, William Lewis, Graeme J Moxey, Deborah L Kays
The reactions between magnesium or zinc alkyls and 1,8-bis(triorganosilyl)diaminonaphthalenes afford the 1,8-bis(triorganosilyl)diamidonaphthalene complexes with elimination of alkanes. The reaction between 1,8-C10H6(NSiMePh2H)2 and one or two equivalents of Mg(n)Bu2 affords two complexes with differing coordination environments for the magnesium; the reaction between 1,8-C10H6(NSiMePh2H)2 and Mg(n)Bu2 in a 1 : 1 ratio affords 1,8-C10H6(NSiMePh2)2{Mg(THF)2} (1), which features a single magnesium centre bridging both ligand nitrogen donors, whilst treatment of 1,8-C10H6(NSiR3H)2 (R3 = MePh2, (i)Pr3) with two equivalents of Mg(n)Bu2 affords the bimetallic complexes 1,8-C10H6(NSiR3)2{(n)BuMg(THF)}2 (R3 = MePh22, R3 = (i)Pr33), which feature four-membered Mg2N2 rings...
March 9, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28266666/monodentate-phosphine-substitution-in-pd-%C3%AE%C2%BA-3-dppf-pr3-bf4-2-dppf-1-1-bis-diphenylphosphino-ferrocene-compounds
#4
K D Cabrera, A T Rowland, J M Szarko, P L Diaconescu, M W Bezpalko, W S Kassel, C Nataro
The ligand 1,1'-bis(diphenylphosphino)ferrocene (dppf) is commonly employed in a variety of catalytic systems. There are a variety of coordination modes known for dppf, the least studied being the κ(3) coordination mode, in which both phosphorus atoms and the iron atom of dppf interact with another metal center. One such compound is the previously reported [Pd(κ(3)-dppf)(PPh3)](2+). A series of related compounds, [Pd(κ(3)-dppf)(P(p-C6H4R)3)](2+) (R = OCH3, CH3, F and CF3), has been synthesized and characterized...
March 7, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28263574/mechanistic-studies-on-a-cooperative-nhc-organocatalysis-palladium-catalysis-system-uncovering-significant-lessons-for-mixed-chiral-pd-nhc-pr3-catalyst-design
#5
Chang Guo, Daniel Janssen-Müller, Mirco Fleige, Andreas Lerchen, Constantin Gabriel Daniliuc, Frank Glorius
A comprehensive investigation of the mechanism of the highly enantioselective Pd(PPh3)4/NHC-catalyzed annulation of vinyl benzoxazinanones and enals has been conducted. A study of reaction orders supports the postulated coopera-tive catalysis. Interestingly, a detailed investigation of the catalytically active palladium species pointed towards a dual-role of the NHC acting as an organocatalyst and forming a novel mixed ligand Pd/NHC/phosphine complex. The cata-lytically active Pd/NHC/phosphine complex represents a new class of chiral palladium catalyst...
March 6, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28261989/five-factor-score-more-than-1-is-associated-with-relapse-during-the-first-2-year-follow-up-in-patients-with-eosinophilic-granulomatosis-with-polyangiitis
#6
Dae Sik Kim, Jason Jungsik Song, Yong-Beom Park, Sang-Won Lee
AIM: We investigated what variables at diagnosis might be associated with the relapse of eosinophilic granulomatosis with polyangiitis (EGPA) and whether five factor score (FFS) at diagnosis might predict it. METHODS: We reviewed the medical records of 30 patients with EGPA having results of myeloperoxidase (MPO)-antineutrophil cytoplasmic antibodies (ANCA) and proteinase 3 (PR3)-ANCA and having achieved remission during the first therapeutic regimen administration within follow-up duration for at least more than 2 years...
March 5, 2017: International Journal of Rheumatic Diseases
https://www.readbyqxmd.com/read/28251013/antiproteinase-3-positive-eosinophilic-granulomatosis-with-polyangiitis-presenting-with-heart-failure-and-intraventricular-thrombosis
#7
Dan Zhu, Yiming Luo, Xiangyuan Liu, Lingyun Zu
Eosinophilic granulomatosis with polyangiitis (EGPA) is a rare systemic vasculitis commonly with cardiac complications. We describe a case of anti-PR3 ANCA-positive EGPA complicated by congestive heart failure and intraventricular thrombosis. Interestingly, the thrombus was resolved rapidly with steroid and cyclophosphamide in the setting of interrupted anticoagulation. To the best of our knowledge, we report the first case of anti-PR3 positive EGPA with extensive cardiac involvement. Our patient had overlapping features with previously studied ANCA-positive and ANCA-negative EGPA cases...
2017: Case Reports in Rheumatology
https://www.readbyqxmd.com/read/28240246/characterization-of-the-cd177-interaction-with-the-anca-antigen-proteinase-3
#8
Uwe Jerke, Stephen F Marino, Oliver Daumke, Ralph Kettritz
Proteinase 3 is a serine protease found in neutrophil granules and on the extracellular neutrophil membrane (mPR3). mPR3 is a major antigen for anti-neutrophil cytoplasmic antibodies (PR3-ANCAs), autoantibodies causing fatal autoimmune diseases. In most individuals, a subpopulation of neutrophils also produce CD177, proposed to present additional PR3 on the surface, resulting in CD177(neg)/mPR3(low) and CD177(pos)/mPR3(high) neutrophil subsets. A positive correlation has been shown between mPR3 abundance, disease incidence, and clinical outcome...
February 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28225490/clinical-characteristics-and-outcome-of-spanish-patients-with-anca-associated-vasculitides-impact-of-the-vasculitis-type-anca-specificity-and-treatment-on-mortality-and-morbidity
#9
MULTICENTER STUDY
Roser Solans-Laqué, Guadalupe Fraile, Monica Rodriguez-Carballeira, Luis Caminal, Maria J Castillo, Ferran Martínez-Valle, Luis Sáez, Juan J Rios, Xavier Solanich, Joaquim Oristrell, Francisco Pasquau, Eva Fonseca, Monica Zamora, Jose L Callejas, Begoña Frutos, Monica Abdilla, Patricia Fanlo, Isabel García-Sánchez, Miguel López-Dupla, Bernardo Sopeña, Almudena Pérez-Iglesias, Josep A Bosch
The aim of this study was to describe the clinical characteristics of ANCA-associated vasculitides (AAV) at presentation, in a wide cohort of Spanish patients, and to analyze the impact of the vasculitis type, ANCA specificity, prognostic factors, and treatments administered at diagnosis, in the outcome.A total of 450 patients diagnosed between January 1990 and January 2014 in 20 Hospitals from Spain were included. Altogether, 40.9% had granulomatosis with polyangiitis (GPA), 37.1% microscopic polyangiitis (MPA), and 22% eosinophilic granulomatosis with polyangiitis (EGPA)...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28220286/characteristics-of-hypertrophic-pachymeningitis-in-patients-with-granulomatosis-with-polyangiitis
#10
Hyun Ah Choi, Mi Ji Lee, Chin-Sang Chung
Hypertrophic pachymeningitis (HP) is an important neurologic complication of granulomatosis with polyangiitis (GPA, formerly Wegener's granulomatosis). The aim of this study is to investigate the clinical features, radiological findings, and diagnostic pitfalls of GPA-related HP. A retrospective chart review was performed to screen patients diagnosed with GPA at Samsung Medical Center between 1997 and 2016. Neurologic manifestation, laboratory findings, neuroimaging data, and clinical course were evaluated in all patients...
February 20, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28192517/neutrophils-and-neutrophil-serine-proteases-are-increased-in-the-spleens-of-estrogen-treated-c57bl-6-mice-and-several-strains-of-spontaneous-lupus-prone-mice
#11
Rujuan Dai, Catharine Cowan, Bettina Heid, Deena Khan, Zhihong Liang, Christine T N Pham, S Ansar Ahmed
Estrogen, a natural immunomodulator, regulates the development and function of diverse immune cell types. There is now renewed attention on neutrophils and neutrophil serine proteases (NSPs) such as neutrophil elastase (NE), proteinase 3 (PR3), and cathepsin G (CG) in inflammation and autoimmunity. In this study, we found that although estrogen treatment significantly reduced total splenocytes number, it markedly increased the splenic neutrophil absolute numbers in estrogen-treated C57BL/6 (B6) mice when compared to placebo controls...
2017: PloS One
https://www.readbyqxmd.com/read/28172776/p291-proteinase-3-antineutrophil-cytoplasmic-antibodies-pr3-anca-would-be-a-predictive-biomarker-for-the-clinical-course-of-ulcerative-colitis
#12
M Sono, T Yoshino, S Yazumi
No abstract text is available yet for this article.
February 1, 2017: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/28169190/galactosylation-and-sialylation-levels-of-igg-predict-relapse-in-patients-with-pr3-anca-associated-vasculitis
#13
Michael J Kemna, Rosina Plomp, Pieter van Paassen, Carolien A M Koeleman, Bas C Jansen, Jan G M C Damoiseaux, Jan Willem Cohen Tervaert, Manfred Wuhrer
OBJECTIVE: The objective of our study is to investigate the Fc glycosylation profiles of both antigen-specific IgG targeted against proteinase 3 (PR3-ANCA) and total IgG as prognostic markers of relapse in patients with Granulomatosis with Polyangiitis (GPA). METHODS: Seventy-five patients with GPA and a PR3-ANCA rise during follow-up were included, of whom 43 patients relapsed within a median period of 8 (2-16) months. The N-glycan at Asn297 of affinity-purified and denatured total IgG and PR3-ANCA was determined by mass spectrometry of glycopeptides in samples obtained at the time of the PR3-ANCA rise and at the time of the relapse or time-matched during remission...
January 28, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28164709/selective-monoarylation-of-aromatic-ketones-and-esters-via-cleavage-of-aromatic-carbon-heteroatom-bonds-by-trialkylphosphine-ruthenium-catalysts
#14
Hikaru Kondo, Takuya Kochi, Fumitoshi Kakiuchi
We report here the ruthenium-catalyzed selective monoarylation of aromatic ketones bearing two ortho carbon-heteroatom (O or N) bonds. Under the newly developed catalyst system consisting of RuHCl(CO)(P(i)Pr3)2, CsF, and styrene, the C-O arylation of 2',6'-dimethoxyacetophenone with a phenylboronate gave the C-O monoarylation product selectively. The selective C-O monoarylation was applicable to a variety of arylboronates and aromatic ketones and proceeds with high regio- and chemoselectivities. A formal synthesis of altertenuol was also achieved using the C-O monoarylation of an aromatic ester as a key step...
February 6, 2017: Organic Letters
https://www.readbyqxmd.com/read/28152491/aggregatibacter-aphrophilus-infective-endocarditis-confirmed-by-broad-range-pcr-diagnosis-a-case-report
#15
Koji Hirano, Toshiya Tokui, Masahiro Inagaki, Taro Fujii, Yasumi Maze, Hirokazu Toyoshima
INTRODUCTION: Aggregatibacter aphrophilus is a rare cause of infective endocarditis. This pathogen is difficult to identify with common culture methods, which can lead to incorrect diagnosis and treatment. PRESENTATION OF CASE: A 72-year-old woman was admitted to a community hospital with a persistent high fever and deteriorating renal function. Based on negative blood culture and positive serum proteinase 3 anti-neutrophil cytoplasmic antibody (PR3-ANCA), acute renal failure associated with ANCA-rerated vasculitis was initially suspected...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28139439/neutrophil-protease-cleavage-of-von-willebrand-factor-in-glomeruli-an-anti-thrombotic-mechanism-in-the-kidney
#16
Ramesh Tati, Ann-Charlotte Kristoffersson, Minola Manea Hedström, Matthias Mörgelin, Jörgen Wieslander, Cees van Kooten, Diana Karpman
Adequate cleavage of von Willebrand factor (VWF) prevents formation of thrombi. ADAMTS13 is the main VWF-cleaving protease and its deficiency results in development of thrombotic microangiopathy. Besides ADAMTS13 other proteases may also possess VWF-cleaving activity, but their physiological importance in preventing thrombus formation is unknown. This study investigated if, and which, proteases could cleave VWF in the glomerulus. The content of the glomerular basement membrane (GBM) was studied as a reflection of processes occurring in the subendothelial glomerular space...
February 2017: EBioMedicine
https://www.readbyqxmd.com/read/28135657/trichoderma-harzianum-containing-1-aminocyclopropane-1-carboxylate-deaminase-and-chitinase-improved-growth-and-diminished-adverse-effect-caused-by-fusarium-oxysporum-in-soybean
#17
Fuli Zhang, Can Chen, Fan Zhang, Lidong Gao, Jidong Liu, Long Chen, Xiaoning Fan, Chang Liu, Ke Zhang, Yuting He, Chen Chen, Xiue Ji
An isolate, named Trichoderma harzianum T-soybean, showed growth-promoting for soybean seedlings and induced resistance to Fusarium oxysporum under greenhouse. Compared to control soybean seedlings, fresh weight, dry weight, lateral root number, chlorophyll content, root activity and soluble protein of plants pretreated with T-soybean increased, but initial pod height reduced. Furthermore, we found that T-soybean inhibited the growth of F. oxysporum by parasitic function. In addition, plate test results showed that culture filtrates of T-soybean also inhibited significantly F...
November 29, 2016: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28134074/chest-and-renal-involvements-birmingham-vascular-activity-score-more-than-13-5-and-five-factor-score-1996-more-than-1-at-diagnosis-are-significant-predictors-of-relapse-of-microscopic-polyangiitis
#18
Yoon-Jeong Oh, Sung Soo Ahn, Eun Seong Park, Seung Min Jung, Jason Jungsik Song, Yong-Beom Park, Sang-Won Lee
OBJECTIVES: We investigated whether specified organ involvements, antineutrophil cytoplasmic antibody (ANCA) positivity, Birmingham vasculitis activity score (BVAS) and five factor scores (FFS) at diagnosis could predict relapse of microscopic polyangiitis (MPA). METHODS: We reviewed the medical records of 90 patients with MPA. We collected clinical and prognostic data, (MPO)-ANCA and proteinase 3 (PR3)-ANCA, BVAS and FFS at diagnosis, and we compared them between the two groups...
January 19, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28119817/a-case-of-proteinase-3-anti-neutrophil-cytoplasmic-antibody-pr3-anca-positive-igg4-related-lung-disease
#19
Hirokazu Touge, Katsuyuki Tomita, Akira Yamasaki, Eiji Shimizu
IgG4-related lung disease (IgG4-RLD) is a rare and chronic progressive autoimmune disease. We report a case of IgG4-related inflammatory pseudo-tumor of the lung that was seropositive for proteinase 3 anti-neutrophil cytoplasmic antibody (PR3-ANCA). A 61-year-old male had a mass lesion in the right lower lung field in chest X-ray. Transbronchial lung biopsy resulted in a pathological diagnosis of IgG4-RLD. The condition was improved by hormonal therapy.
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/28079854/time-course-of-serum-pro-inflammatory-cytokines-and-chemokines-levels-observed-in-granulomatosis-with-polyangiitis-a-case-report
#20
Yutaka Kozu, Yusuhiro Gon, Yuki Takano, Takao Noguchi, Shinichi Hayashi, Fumio Kumasawa, Kenji Mizumura, Shuichiro Maruoka, Shu Hashimoto
A 77-year-old man visited our hospital with chief complaints of difficulty in hearing, nasal discharge and fever. The patients was diagnosed with otitis media, and his fever continued at approximately 38°C despite the administration of clarithromycin. After that, dyspnea on exertion developed and chest X-ray examination indicated multiple infiltrative shadows. PR3-ANCA levels were high (238-fold of the normal levels), and granulomatosis with polyangiitis (GPA) was diagnosed on the basis of clinical symptoms, laboratory results, and pathological findings...
December 23, 2016: Sarcoidosis, Vasculitis, and Diffuse Lung Diseases: Official Journal of WASOG
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