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https://www.readbyqxmd.com/read/28081265/the-plasmin-sensitive-protein-pls-in-methicillin-resistant-staphylococcus-aureus-mrsa-is-a-glycoprotein
#1
Isabelle Bleiziffer, Julian Eikmeier, Gottfried Pohlentz, Kathryn McAulay, Guoqing Xia, Muzaffar Hussain, Andreas Peschel, Simon Foster, Georg Peters, Christine Heilmann
Most bacterial glycoproteins identified to date are virulence factors of pathogenic bacteria, i.e. adhesins and invasins. However, the impact of protein glycosylation on the major human pathogen Staphylococcus aureus remains incompletely understood. To study protein glycosylation in staphylococci, we analyzed lysostaphin lysates of methicillin-resistant Staphylococcus aureus (MRSA) strains by SDS-PAGE and subsequent periodic acid-Schiff's staining. We detected four (>300, ∼250, ∼165, and ∼120 kDa) and two (>300 and ∼175 kDa) glycosylated surface proteins with strain COL and strain 1061, respectively...
January 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28076897/microrna-expression-shows-inflammatory-dysregulation-and-tumor-like-proliferative-responses-in-joints-of-patients-with-post-infectious-lyme-arthritis
#2
Robert B Lochhead, Klemen Strle, Nancy D Kim, Minna J Kohler, Sheila L Arvikar, John M Aversa, Allen C Steere
OBJECTIVE: Lyme arthritis (LA) is caused by infection with Borrelia burgdorferi and usually resolves following spirochetal killing with antibiotics. However, in some patients, arthritis persists after antibiotic therapy. To provide insights into underlying pathogenic processes associated with post-infectious LA, we analyzed differences in microRNA expression between LA patients with active infection compared with those with post-infectious LA. METHODS: MicroRNA expression was assayed in synovial fluid (SF) from LA patients before and after oral and IV antibiotic therapy, and from synovial tissue from post-infectious LA patients obtained months after antibiotic therapy...
January 11, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/28076516/septic-arthritis-of-the-knee-clinical-and-laboratory-comparison-of-groups-with-different-etiologies
#3
Camilo Partezani Helito, Paulo Renan Lima Teixeira, Priscila Rosalba de Oliveira, Vladimir Cordeiro de Carvalho, José Ricardo Pécora, Gilberto Luis Camanho, Marco Kawamura Demange, Ana Lucia Munhoz Lima
OBJECTIVES: To clinically and epidemiologically characterize a population diagnosed with and treated for septic arthritis of the knee, to evaluate the treatment results and to analyze the differences between patients with positive and negative culture results, patients with Gram-positive and Gram-negative bacterial isolates and patients with S. aureus- and non-S. aureus-related infections. METHODS: One hundred and five patients with septic knee arthritis were included in this study...
December 1, 2016: Clinics
https://www.readbyqxmd.com/read/28069819/temporal-role-for-myd88-in-a-model-of-brucella-induced-arthritis-and-musculoskeletal-inflammation
#4
Carolyn A Lacey, William J Mitchell, Charles R Brown, Jerod A Skyberg
Brucella spp. are facultative intracellular Gram-negative bacteria that cause the zoonotic disease brucellosis, one of the most common global zoonoses. Osteomyelitis, arthritis and musculoskeletal inflammation are common focal complications of brucellosis in humans; however, wild-type (WT) mice infected systemically with conventional doses of Brucella do not develop these complications. Here we report WT C57BL/6 mice infected via the footpad with 10(3)-10(6) CFUs of Brucella spp. display neutrophil and monocyte infiltration to the joint space and surrounding musculoskeletal tissue...
January 9, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28032700/management-of-acute-hematogenous-infection-following-total-knee-arthroplasty-a-case-series-of-11-patients
#5
Rui He, Liu Yang, Lin Guo, Hao Chen, Ying Zhang, Dian-Ming Jiang
OBJECTIVE: Acute hematogenous infection is a devastating complication that can occur after total knee arthroplasty (TKA). The best strategies for management of this infection remain controversial. Two-stage revision has been well described as the gold standard for the management of chronic late infections. However, there is a paucity of information presently available on the management and outcomes of patients treated for acute hematogenous infections. The purpose of the present study was to report the outcome of acute hematogenous infections following TKA with the treatment of irrigation, debridement, and retention of the prosthetic components...
November 2016: Orthopaedic Surgery
https://www.readbyqxmd.com/read/27974664/aggregatibacter-actinomycetemcomitans-induced-hypercitrullination-links-periodontal-infection-to-autoimmunity-in-rheumatoid-arthritis
#6
Maximilian F Konig, Loreto Abusleme, Jesper Reinholdt, Robert J Palmer, Ricardo P Teles, Kevon Sampson, Antony Rosen, Peter A Nigrovic, Jeremy Sokolove, Jon T Giles, Niki M Moutsopoulos, Felipe Andrade
A bacterial etiology of rheumatoid arthritis (RA) has been suspected since the beginnings of modern germ theory. Recent studies implicate mucosal surfaces as sites of disease initiation. The common occurrence of periodontal dysbiosis in RA suggests that oral pathogens may trigger the production of disease-specific autoantibodies and arthritis in susceptible individuals. We used mass spectrometry to define the microbial composition and antigenic repertoire of gingival crevicular fluid in patients with periodontal disease and healthy controls...
December 14, 2016: Science Translational Medicine
https://www.readbyqxmd.com/read/27966012/-surface-replacement-of-proximal-interphalangeal-joints-using-capflex-pip
#7
S F Schindele, A Altwegg, S Hensler
OBJECTIVE OF SURGERY: The cementless implantation of the surface replacement CapFlex-PIP enables pain relief, preservation of motion, improves lateral stability and corrects axis deviation in proximal interphalangeal (PIP) joints of patients with primary and secondary PIP osteoarthritis. INDICATIONS: Painful PIP joints as a result of degenerative or posttraumatic osteoarthritis with restriction of motion. Secondary inflammatory destruction of PIP joints in rheumatoid arthritis with low inflammatory activity and good bone conditions...
December 13, 2016: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/27959965/functional-analyses-of-the-crohn-s-disease-risk-gene-lacc1
#8
Ghazaleh Assadi, Liselotte Vesterlund, Ferdinando Bonfiglio, Luca Mazzurana, Lina Cordeddu, Danika Schepis, Jenny Mjösberg, Sabrina Ruhrmann, Alessia Fabbri, Vladana Vukojevic, Piergiorgio Percipalle, Florian A Salomons, Jurga Laurencikiene, Leif Törkvist, Jonas Halfvarson, Mauro D'Amato
BACKGROUND: Genetic variation in the Laccase (multicopper oxidoreductase) domain-containing 1 (LACC1) gene has been shown to affect the risk of Crohn's disease, leprosy and, more recently, ulcerative colitis and juvenile idiopathic arthritis. LACC1 function appears to promote fatty-acid oxidation, with concomitant inflammasome activation, reactive oxygen species production, and anti-bacterial responses in macrophages. We sought to contribute to elucidating LACC1 biological function by extensive characterization of its expression in human tissues and cells, and through preliminary analyses of the regulatory mechanisms driving such expression...
2016: PloS One
https://www.readbyqxmd.com/read/27942968/false-positive-cultures-after-native-knee-aspiration-true-or-false
#9
Jason M Jennings, Douglas A Dennis, Raymond H Kim, Todd M Miner, Charlie C Yang, David C McNabb
BACKGROUND: Synovial fluid aspiration is a routine practice used by most orthopaedic surgeons to aid in the diagnosis of joint infection. In patients for whom there is a low pretest probability of infection, a positive culture-particularly if it is a broth-only culture-may be considered a contaminant, especially if the bacterial species are skin pathogens. To our knowledge no study has evaluated the incidence of contamination of aspirations from the native knee. QUESTIONS/PURPOSES: What is the frequency of false-positive cultures among knee aspirations of the native knee? METHODS: Two hundred patients, with a total of 200 knees, with the diagnosis of degenerative osteoarthritis undergoing a total knee arthroplasty (TKA) were identified for this study...
December 9, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27919207/safety-and-effectiveness-of-24-week-treatment-with-iguratimod-a-new-oral-disease-modifying-antirheumatic-drug-for-patients-with-rheumatoid-arthritis-interim-analysis-of-a-post-marketing-surveillance-study-of-2679-patients-in-japan
#10
Tsuneyo Mimori, Masayoshi Harigai, Tatsuya Atsumi, Takao Fujii, Masataka Kuwana, Hiroaki Matsuno, Shigeki Momohara, Syuji Takei, Naoto Tamura, Yoshinari Takasaki, Satoshi Ikeuchi, Satoru Kushimoto, Takao Koike
OBJECTIVE: To determine the real-world safety and effectiveness of iguratimod (IGU) for rheumatoid arthritis (RA), a 52-week, Japanese, post-marketing surveillance study was conducted. An interim analysis at week 24 was performed. METHODS: This study included all RA patients who received IGU following its introduction to the market. All adverse events (AEs) and adverse drug reactions (ADRs) were collected. Effectiveness was evaluated by the change in Disease Activity Score 28-C-reactive protein (DAS28-CRP) from baseline to week 24...
December 21, 2016: Modern Rheumatology
https://www.readbyqxmd.com/read/27914160/infectious-postpartum-sacroiliitis-the-importance-and-difficulty-of-early-diagnosis
#11
Emídio Vale-Fernandes, Fedra Rodrigues, Carla Monteiro, Luís Carvalho
The sacroiliitis accounts for about 1.5% - 10% of all cases of septic arthritis and it is strongly associated with gynaecological infections, pelvic trauma or drug abuse (3.4% - 12.8% of cases occur during the postpartum period). Early diagnosis is difficult because the symptoms are nonspecific in pregnancy and in the postpartum period, making the delay of treatment a serious risk of irreversible damage to the joint and development of post-infectious complications. The authors describe the case of a 37-year-old puerperal woman presented to hospital, weeks after urgent caesarean section, with endometritis, post-anesthetic epidural hematoma and secondary infectious postpartum sacroiliitis...
August 2016: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/27911839/identifying-species-of-symbiont-bacteria-from-the-human-gut-that-alone-can-induce-intestinal-th17-cells-in-mice
#12
Tze Guan Tan, Esen Sefik, Naama Geva-Zatorsky, Lindsay Kua, Debdut Naskar, Fei Teng, Lesley Pasman, Adriana Ortiz-Lopez, Ray Jupp, Hsin-Jung Joyce Wu, Dennis L Kasper, Christophe Benoist, Diane Mathis
Th17 cells accrue in the intestine in response to particular microbes. In rodents, segmented filamentous bacteria (SFB) induce intestinal Th17 cells, but analogously functioning microbes in humans remain undefined. Here, we identified human symbiont bacterial species, in particular Bifidobacterium adolescentis, that could, alone, induce Th17 cells in the murine intestine. Similar to SFB, B. adolescentis was closely associated with the gut epithelium and engendered cognate Th17 cells without attendant inflammation...
December 13, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27911391/a-murine-model-of-group-b-streptococcus-vaginal-colonization
#13
Kathryn A Patras, Kelly S Doran
Streptococcus agalactiae (group B Streptococcus, GBS), is a Gram-positive, asymptomatic colonizer of the human gastrointestinal tract and vaginal tract of 10 - 30% of adults. In immune-compromised individuals, including neonates, pregnant women, and the elderly, GBS may switch to an invasive pathogen causing sepsis, arthritis, pneumonia, and meningitis. Because GBS is a leading bacterial pathogen of neonates, current prophylaxis is comprised of late gestation screening for GBS vaginal colonization and subsequent peripartum antibiotic treatment of GBS-positive mothers...
November 16, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27909795/altered-gut-microbiota-in-ra-implications-for-treatment
#14
Y Kang, Y Cai, X Zhang, X Kong, J Su
Rheumatoid arthritis (RA) is an autoimmune disease with progressive joint disorder. The complex interplay of genetic and environmental influences is important for the development of the disease. A growing body of evidence has shed light on the association of dysbiosis of gut microbiota with RA. Certain gut microbial strains have been shown to inhibit or attenuate immune responses in RA experimental models, suggesting that specific species among intestinal commensal bacteria may play either a pathogenic or a protective role in the development of RA...
December 1, 2016: Zeitschrift Für Rheumatologie
https://www.readbyqxmd.com/read/27907047/rage-deficiency-impairs-bacterial-clearance-in-murine-staphylococcal-sepsis-but-has-no-significant-impact-on-staphylococcal-septic-arthritis
#15
Majd Mohammad, Manli Na, Amanda Welin, Mattias N D Svensson, Abukar Ali, Tao Jin, Rille Pullerits
BACKGROUND: Septic arthritis is a serious joint disease often caused by Staphylococcus aureus (S. aureus). Receptor for Advanced Glycation End products (RAGE) has an important role in several infections. We sought to investigate the role of RAGE in staphylococcal septic arthritis and sepsis in mice. METHODS: Wild-type (WT) and RAGE deficient (RAGE-/-) mice were intra-articularly or intravenously inoculated with an arthritic or septic dose of S. aureus LS-1 strain...
2016: PloS One
https://www.readbyqxmd.com/read/27904045/puerarin-prevents-lps-induced-osteoclast-formation-and-bone-loss-via-inhibition-of-akt-activation
#16
Yun Zhang, Ming Yan, Qing-Feng Yu, Pei-Fan Yang, Hai-Dong Zhang, Yong-Hong Sun, Zhi-Fen Zhang, Yun-Feng Gao
Osteolysis induced by chronic Gram-negative bacterial infection underlies many bone diseases such as osteomyelitis, septic arthritis, and periodontitis. Drugs that inhibit lipopolysaccharide (LPS)-induced osteolysis are critically needed for the prevention of bone destruction in infective bone diseases. In this study, we assessed the effect of puerarin, a natural isoflavone isolated from Pueraria lobata OHWI root, on LPS-induced osteoclastogenesis and bone loss. Our in vitro study showed that puerarin significantly inhibited LPS-induced osteoclast differentiation from osteoclast precursor RAW264...
2016: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/27902653/meningococcal-disease-in-children-in-argentina-a-three-year-active-sentinel-hospital-surveillance-study
#17
Ángela Gentile, Julia Bakir, María Rosa Agosti, Gabriela Ensinck, Hector Abate, Andrea Gajo Gane, Alejandro Santillán Iturres, Adriana Efron, Mabel Regueira, Ricardo Rüttimann
BACKGROUND: Meningococcal disease (MD) is a medical emergency and a serious public health problem. As new meningococcal vaccines become available, MD surveillance is crucial to provide baseline epidemiologic data before implementing preventive measures. We estimated MD incidence and epidemiology in Argentina using hospital-based surveillance. METHODS: 3-year prospective active surveillance in patients ≤15 years of age conducted at 6 pediatric hospital sentinel units (March 2012-February 2015)...
November 28, 2016: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/27902172/is-it-easy-to-clinically-distinguish-inflammatory-arthritis-of-bacterial-origin-from-monoarthritis-attacks-of-gout-disease
#18
O Şahap Atik, Yılmaz Ergişi, Tacettin Ayanoğlu, Mehmet Ali Tokgöz, Erdem Aras Sezgin, Pınar Uyar Göçün
Acute monoarthritis is a common situation in orthopedic emergency where the patient presents with typical inflamed joint. It is hard to clinically distinguish inflammatory arthritis of bacterial origin from monoarthritis attacks of gout disease. If these two situations, which are the most common causes of acute monoarthritis, are misdiagnosed, outcomes might be catastrophic and costly. Synovial fluid analysis is the most reliable method for confirming the diagnosis although it might not always lead to definitive diagnosis...
December 2016: Eklem Hastalıkları Ve Cerrahisi, Joint Diseases & related Surgery
https://www.readbyqxmd.com/read/27901071/staphylococcus-aureus-dependent-septic-arthritis-in-murine-knee-joints-local-immune-response-and-beneficial-effects-of-vaccination
#19
Alessia Corrado, Paolo Donato, Silvia Maccari, Raffaella Cecchi, Tiziana Spadafina, Letizia Arcidiacono, Simona Tavarini, Chiara Sammicheli, Donatello Laera, Andrea Guido Oreste Manetti, Paolo Ruggiero, Bruno Galletti, Sandra Nuti, Ennio De Gregorio, Sylvie Bertholet, Anja Seubert, Fabio Bagnoli, Giuliano Bensi, Emiliano Chiarot
Staphylococcus aureus is the major cause of human septic arthritis and osteomyelitis, which deserve special attention due to their rapid evolution and resistance to treatment. The progression of the disease depends on both bacterial presence in situ and uncontrolled disruptive immune response, which is responsible for chronic disease. Articular and bone infections are often the result of blood bacteremia, with the knees and hips being the most frequently infected joints showing the worst clinical outcome. We report the development of a hematogenous model of septic arthritis in murine knees, which progresses from an acute to a chronic phase, similarly to what occurs in humans...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27889698/major-involvement-of-bacterial-components-in-rheumatoid-arthritis-and-its-accompanying-oxidative-stress-systemic-inflammation-and-hypercoagulability
#20
Etheresia Pretorius, Oore-Ofe Akeredolu, Prashilla Soma, Douglas B Kell
We review the evidence that infectious agents, including those that become dormant within the host, have a major role to play in much of the etiology of rheumatoid arthritis and the inflammation that is its hallmark. This occurs in particular because they can produce cross-reactive (auto-)antigens, as well as potent inflammagens such as lipopolysaccharide that can themselves catalyze further inflammagenesis, including via β-amyloid formation. A series of observables coexist in many chronic, inflammatory diseases as well as rheumatoid arthritis...
November 25, 2016: Experimental Biology and Medicine
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