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https://www.readbyqxmd.com/read/28336429/insight-into-stereochemistry-of-a-new-imp-allelic-variant-imp-55-metallo-%C3%AE-lactamase-identified-in-a-clinical-strain-of-acinetobacter-baumannii
#1
Mohammad Reza Shakibaie, Omid Azizi, Fereshteh Shahcheraghi
Metallo-β-lactamases (MBLs) such as IMPs are broad-spectrum β-lactamases that inactivate virtually all β-lactam antibiotics including carbapenems. In this study, we investigated the hydrolytic activity, phylogenetic relationship, three dimensional (3D) structure including zinc binding motif of a new IMP variant (IMP-55) identified in a clinical strain of Acinetobacter baumannii (AB). AB strain 56 was isolated from an adult ICU of a teaching hospital in Kerman, Iran. It exhibited MIC 32μg/ml to imipenem and showed MBL activity...
March 20, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28334057/esthetic-and-patient-centered-outcomes-of-single-implants-a-retrospective-study
#2
Björn Gjelvold, Bruno Ramos Chrcanovic, Ingrid Collin Bagewitz, Jenö Kisch, Tomas Albrektsson, Ann Wennerberg
PURPOSE: The aims of this clinical study were to retrospectively evaluate implant survival, patient satisfaction, and radiographic, clinical, and esthetic outcomes following single-implant treatment. MATERIALS AND METHODS: Eighty-seven patients, with a total of 126 implants (XiVE S, Dentsply Implants), who received single implant-retained crowns between 2004 and 2011 were retrospectively evaluated. Implant survival, marginal bone levels (MBL), changes in implant/mesial tooth vertical relationship, pink esthetic score (PES), white esthetic score (WES), patient assessment of the esthetics (visual analog scale), and oral health impact profile (OHIP-14) were evaluated...
March 23, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28325134/comparison-of-periodontal-and-peri-implant-inflammatory-parameters-among-patients-with-prediabetes-type-2-diabetes-mellitus-and-non-diabetic-controls
#3
Tariq Abduljabbar, Faisal Al-Sahaly, Mohammed Al-Kathami, Sibtain Afzal, Fahim Vohra
OBJECTIVE: The aim was to compare periodontal and periimplant inflammatory parameters (plaque index [PI], bleeding on probing [BOP], probing depth [PD] and marginal bone loss [MBL]) among patients with prediabetes, type-2 diabetes mellitus (T2DM) and non-diabetic controls. MATERIALS AND METHODS: Forty-five patients with prediabetes (Group-1), 43 patients with T2DM (Group-2) and 42 controls (Group-3) were included. Demographic data was recorded using a questionnaire...
March 22, 2017: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/28318015/plasma-levels-of-masp-1-masp-3-and-map44-in-patients-with-type-2-diabetes-influence-of-glycaemic-control-body-composition-and-polymorphisms-in-the-masp1-gene
#4
Sara Skov Krogh, Charlotte Brinck Holt, Rudi Steffensen, Kristian Løkke Funck, Pernille Høyem, Esben Laugesen, Per Løgstrup Poulsen, Steffen Thiel, Troels Krarup Hansen
Mounting evidence indicates that adverse activation of the complement system plays a role in the development of diabetic vascular complications. Plasma levels of the complement proteins mannan-binding lectin (MBL) and its associated serine proteases (MASP-1 and MASP-2) are elevated in diabetes. We hypothesised that single nucleotide polymorphisms (SNPs) in the MASP1 gene may contribute to altered plasma levels of the belonging gene products; MASP-1, MASP-3 and mannan-binding lectin-associated protein of 44 kDa (MAp44) in patients with type 2 diabetes...
March 20, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28304212/influence-of-laser-microtextured-surface-collar-on-marginal-bone-loss-and-peri-implant-soft-tissue-response-a-systematic-review-and-meta-analysis
#5
Zhaozhao Chen, Yujiao Zhang, Junying Li, Hom-Lay Wang, Haiyang Yu
BACKGROUND: Laser-microtextured surface (LMS) dental implant collar appears to promote a more tooth-like gingival collagen fiber attachment, which may help to stabilize the peri-implant tissues. The purpose of this systematic review was to assess the clinical effect of LMS on crestal bone level and peri-implant soft tissue response, versus non-LMS collar. METHODS: Electronic and manual literature searches were performed by two independent reviewers for articles written in English up to December 2016...
March 17, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28303635/incident-microalbuminuria-and-complement-factor-mannan-binding-lectin-associated-protein-19-in-people-with-newly-diagnosed-type-1-diabetes
#6
J A Ostergaard, S Thiel, I T Hoffmann-Petersen, P Hovind, H-H Parving, L Tarnow, P Rossing, T K Hansen
BACKGROUND: Evidence links the lectin pathway of complement activation to diabetic kidney disease. Upon carbohydrate-recognition by pattern-recognition molecules, e.g., mannan-binding lectin (MBL), the MBL-associated serine protease (MASP-2) is activated and initiates the complement cascade. The MASP2 gene encodes MASP-2 and the alternative splice product MBL-associated protein 19 (MAp19). Both MAp19 and MASP-2 circulate in complex with MBL. We tested the hypothesis that MAp19 and MASP-2 concentrations predict the risk of incident microalbuminuria...
March 16, 2017: Diabetes/metabolism Research and Reviews
https://www.readbyqxmd.com/read/28298186/association-of-mannose-binding-lectin-gene-polymorphisms-with-the-development-of-pulmonary-tuberculosis-in-china
#7
Yan-Ling Guo, Yang Liu, Wu-Juan Ban, Qi Sun, Guang-Li Shi
BACKGROUND: Mannose-binding lectin (MBL) is an important protein in the lectin pathway of the immune system. This study explores the association between MBL polymorphism and the susceptibility to tuberculosis (TB). The association between the MBL2 polymorphisms and serum MBL levels is also analyzed in the present study. METHODS: A total of 112 inpatients with pulmonary TB and 120 healthy controls were recruited to participate in this case-control study. Polymerase Chain Reaction-Restriction Fragment Length Polymorphism(PCR-RFLP) technology was used to genotype MBL gene (variants in -221Y/X and exon l codons 54 A/B)...
March 15, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28295668/dissemination-of-metallo-%C3%AE-lactamase-in-pseudomonas-aeruginosa-isolates-in-egypt-mutation-in-blavim-4
#8
Hany Hashem, Amro Hanora, Salah Abdalla, Alaa Shaeky, Alaa Saad
This study was designed to investigate the prevalence of metallo-β-lactamase (MBL) in Pseudomonas aeruginosa isolates collected from Suez Canal University Hospital in Ismailia, Egypt. Antibiotic susceptibility testing and phenotypic and genotypic screening for MBLs were performed on 147 isolates of P. aeruginosa. MICs were determined by agar dilution method for carbapenem that was ≥2 μg/mL for meropenem. MBL genes were detected by multiplex and monoplex PCR for P. aeruginosa-harbored plasmids. Mutation profile of sequenced MBL genes was screened using online software Clustal Omega...
March 15, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28294200/four-year-post-loading-results-of-full-arch-rehabilitation-with-immediate-placement-and-immediate-loading-implants-a-retrospective-controlled-study
#9
Alain Simonpieri, Roberta Gasparro, Giuseppe Pantaleo, Jolanda Mignogna, Francesco Riccitiello, Gilberto Sammartino
OBJECTIVES: The aim of this study was to evaluate implant survival rate and to measure peri-implant bone changes in fullarch rehabilitations with immediate placement and immediate loading implants with platform switching and Morse taper connection, in addition to platelet-rich fibrin (PRF) and buccal bone augmentation, after 4 years of follow-up. METHOD AND MATERIALS: In this retrospective controlled study, patients who had been fully rehabilitated with immediate placement and immediate loading implants were evaluated 4 years post-loading...
March 14, 2017: Quintessence International
https://www.readbyqxmd.com/read/28289035/wck-5107-zidebactam-wck-5153-novel-inhibitors-of-pbp2-showing-potent-%C3%AE-lactam-enhancer-activity-against-pseudomonas-aeruginosa-including-multidrug-resistant-metallo-%C3%AE-lactamase-producing-high-risk-clones
#10
Bartolome Moya, Isabel M Barcelo, Sachin Bhagwat, Mahesh Patel, German Bou, Krisztina M Papp-Wallace, Robert A Bonomo, Antonio Oliver
Zidebactam and WCK 5153 are novel β-lactam enhancers that are bicyclo-acyl hydrazides (BCH), derivatives of diazabicyclooctane (DBO) scaffold, targeted for the treatment of serious infections caused by highly drug-resistant Gram-negative pathogens. In this report, we determined the PBP inhibition profiles and the antimicrobial activity of zidebactam and WCK 5153 against P. aeruginosa, including multidrug-resistant (MDR) metallo-β-lactamase (MBL)-producing high-risk clones. MICs and time-kill assays were conducted for zidebactam, WCK 5153 and antipseudomonal β-lactams using wild-type PAO1 strain, MexAB-OprM-hyperproducing (mexR), porin deficient (oprD) and AmpC-hyperproducing (dacB) derivatives of PAO1 and MBL-expressing clinical strains, ST175 (blaVIM-2) and ST111 (blaVIM-1)...
March 13, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28288720/clonal-b-cell-lymphocytosis-of-marginal-zone-origin
#11
REVIEW
Aliki Xochelli, David Oscier, Kostas Stamatopoulos
Monoclonal B cell Lymphocytosis (MBL) is the term used to characterize individuals presenting with lymphocytosis in the absence of lymphadenopathy, organomegaly or any other features suggestive of an active disease. Based on the immunophenotypic findings, MBL cases are sub-categorized into chronic lymphocytic leukemia (CLL)-like, atypical CLL and non-CLL MBL. The latter corresponds to cases with immunophenotypic features suggestive of post germinal center derivation and still represents a diagnostic conundrum...
March 2017: Best Practice & Research. Clinical Haematology
https://www.readbyqxmd.com/read/28278252/complement-inhibition-by-sarcoptes-scabiei-protects-streptococcus-pyogenes-an-in-vitro-study-to-unravel-the-molecular-mechanisms-behind-the-poorly-understood-predilection-of-s-pyogenes-to-infect-mite-induced-skin-lesions
#12
Pearl M Swe, Lindsay D Christian, Hieng C Lu, Kadaba S Sriprakash, Katja Fischer
BACKGROUND: On a global scale scabies is one of the most common dermatological conditions, imposing a considerable economic burden on individuals, communities and health systems. There is substantial epidemiological evidence that in tropical regions scabies is often causing pyoderma and subsequently serious illness due to invasion by opportunistic bacteria. The health burden due to complicated scabies causing cellulitis, bacteraemia and sepsis, heart and kidney diseases in resource-poor communities is extreme...
March 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28268175/dissemination-of-carbapenem-resistant-acinetobacter-baumannii-in-patients-with-burn-injuries
#13
Saeed Shoja, Mojtaba Moosavian, Soodabeh Rostami, Abbas Farahani, Amir Peymani, Khadijeh Ahmadi, Nasim Ebrahimifard
BACKGROUND: Carbapenem-resistant Acinetobacter baumannii has emerged as an important cause of infection in burn patients. This study aimed to characterize the antimicrobial susceptibility pattern, determine the prevalence of oxacillinase and metallo-beta-lactamase (MBL) genes, and type the A. baumannii isolates obtained from burn patients. METHODS: During a 1-year period, a total of 40 nonduplicated isolates of A. baumannii were obtained from burn patients who were hospitalized in the Taleghani Burn Hospital in Ahvaz, in the southwest of Iran...
March 3, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/28262777/the-role-of-the-complement-system-in-diabetic-nephropathy
#14
REVIEW
Allan Flyvbjerg
The development of type 1 and type 2 diabetes mellitus has a substantial negative impact on morbidity and mortality and is responsible for substantial individual and socioeconomic costs worldwide. One of the most serious consequences of diabetes mellitus is the development of diabetic angiopathy, which manifests clinically as microvascular and macrovascular complications. One microvascular complication, diabetic nephropathy, is the most common cause of end-stage renal disease in developed countries. Although several available therapeutic interventions can delay the onset and progression of diabetic nephropathy, morbidity associated with this disease remains high and new therapeutic approaches are needed...
March 6, 2017: Nature Reviews. Nephrology
https://www.readbyqxmd.com/read/28262240/heavy-menstrual-bleeding-an-update-on-management
#15
Joanna Davies, Rezan A Kadir
Heavy menstrual bleeding (HMB) is defined as excessive menstrual blood loss (MBL) >80 mL per cycle, that interferes with a woman's physical, emotional, social wellbeing and quality of life. Aetiology is due to underlying uterine pathologies, coagulopathy, ovulation dysfunction, or iatrogenic. Up to 20% of women with HMB will have an underlying inherited bleeding disorder (IBD). Assessment of HMB should entail a menstrual and gynaecological history and a bleeding score to distinguish those women who require additional haematological investigations...
March 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28261514/psychosis-in-a-15-year-old-female-with-herpes-simplex-encephalitis-in-a-background-of-mannose-binding-lecithin-deficiency
#16
Kenneth Asogwa, Kwame Buabeng, Amarjit Kaur
Historically, psychotic disorder has been associated with viral infection. Herpes simplex infections and Epstein-Barr virus (EBV) among other viral infections have been implicated in psychotic disorder. Of note in this case report is psychotic disorder that occurred following reactivation of herpes simplex infection in a background of mannose-binding lecithin (MBL) deficiency, childhood EBV infection, and severe psychosocial stress. Herpes simplex encephalitis (HSE) remains a significant cause of morbidity and mortality despite advancement in its treatment with intravenous acyclovir...
2017: Case Reports in Psychiatry
https://www.readbyqxmd.com/read/28258200/endogenous-natural-complement-inhibitor-regulates-cardiac-development
#17
Simon A Mortensen, Louise L Skov, Kasper Kjaer-Sorensen, Annette G Hansen, Søren Hansen, Frederik Dagnæs-Hansen, Jens C Jensenius, Claus Oxvig, Steffen Thiel, Søren E Degn
Congenital heart defects are a major cause of perinatal mortality and morbidity, affecting >1% of all live births in the Western world, yet a large fraction of such defects have an unknown etiology. Recent studies demonstrated surprising dual roles for immune-related molecules and their effector mechanisms during fetal development and adult homeostasis. In this article, we describe the function of an endogenous complement inhibitor, mannan-binding lectin (MBL)-associated protein (MAp)44, in regulating the composition of a serine protease-pattern recognition receptor complex, MBL-associated serine protease (MASP)-3/collectin-L1/K1 hetero-oligomer, which impacts cardiac neural crest cell migration...
March 3, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28258003/ctx-m-15-and-oxa-10-beta-lactamases-in-multi-drug-resistant-pseudomonas-aeruginosa-first-report-from-pakistan
#18
Waheed Ullah, Muhammad Qasim, Hazir Rahman, Saadullah Khan, Zia Ur Rehman, Nawab Ali, Noor Muhammad
BACKGROUND: Pseudomonas aeruginosa is an emerging threat to public health worldwide due to their rapid development of drug resistance including beta-lactamases. The present study was designed to investigate the incidence of β-lactamases and genotypic pattern of CTX and OXA in the clinical isolate of multidrug resistant P. aeruginosa. METHODS: In this study a total of 102 MDR P. aeruginosa isolates obtained from Lady Reading Hospital, Peshawar, Pakistan were subjected to extended spectrum beta lactamase (ESBL), metallo beta lactamase (MBL) and plasmid mediated β-lactamase (AmpC) detection using phenotypic and molecular methods...
February 28, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28252254/-19-f-nmr-reveals-the-role-of-mobile-loops-in-product-and-inhibitor-binding-by-the-s%C3%A3-o-paulo-metallo-%C3%AE-lactamase
#19
Martine I Abboud, Philip Hinchliffe, Jürgen Brem, Robert Macsics, Inga Pfeffer, Anne Makena, Klaus-Daniel Umland, Anna M Rydzik, Guo-Bo Li, James Spencer, Timothy D W Claridge, Christopher J Schofield
Resistance to β-lactam antibiotics mediated by metallo-β-lactamases (MBLs) is a growing problem. We describe the use of protein-observe (19) F-NMR (PrOF NMR) to study the dynamics of the São Paulo MBL (SPM-1) from β-lactam-resistant Pseudomonas aeruginosa. Cysteinyl variants on the α3 and L3 regions, which flank the di-Zn(II) active site, were selectively (19) F-labeled using 3-bromo-1,1,1-trifluoroacetone. The PrOF NMR results reveal roles for the mobile α3 and L3 regions in the binding of both inhibitors and hydrolyzed β-lactam products to SPM-1...
March 2, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28246614/mannose-binding-lectin-biologic-characteristics-and-role-in-the-susceptibility-to-infections-and-ischemia-reperfusion-related-injury-in-critically-ill-neonates
#20
REVIEW
Cinzia Auriti, Giusi Prencipe, Maria Moriondo, Iliana Bersani, Chiara Bertaina, Vito Mondì, Rita Inglese
The mannose-binding lectin (MBL) is a member of the collectin family, belonging to the innate immunity system. Genetic, biologic, and clinical properties of MBL have been widely investigated throughout the last decades, although some interesting aspects of its potential clinical relevance are still poorly understood. Low circulating concentrations of MBL have been associated with increased risk of infection and poor neurologic outcome in neonates. On the other hand, an excessive and uncontrolled inflammatory response by the neonatal intestine after the exposure to luminal bacteria, leading to an increased production of MBL, may be involved in the onset of necrotizing enterocolitis...
2017: Journal of Immunology Research
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