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https://www.readbyqxmd.com/read/28063655/analysis-of-home-dust-for-staphylococcus-aureus-and-staphylococcal-enterotoxin-genes-using-quantitative-pcr
#1
Shanna Ludwig, Isabel Jimenez-Bush, Emily Brigham, Sonali Bose, Gregory Diette, Meredith C McCormack, Elizabeth C Matsui, Meghan F Davis
BACKGROUND: The bacterium Staphylococcus aureus (SA) is known to induce allergic inflammatory responses, including through secreted staphylococcal enterotoxin (SE) superantigens. To quantify indoor environmental exposures to these potential allergens, which may be associated with worse asthma, we developed a method for the assessment of S. aureus and SE in home dust and applied it to a study of homes of inner-city adults with asthma. METHODS: We conducted laboratory experiments to optimize sample processing and real-time PCR methods for detection and quantification of SA (femB) and SEA-D, based on published primers...
January 4, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28062087/does-an-integrated-boost-increase-acute-toxicity-in-prone-hypofractionated-breast-irradiation-a-randomized-controlled-trial
#2
Leen Paelinck, Akos Gulyban, Ferenc Lakosi, Tom Vercauteren, Werner De Gersem, Bruno Speleers, Christel Monten, Thomas Mulliez, Patrick Berkovic, Annick van Greveling, Frederik Decoster, Philippe Coucke, Wilfried De Neve, Liv Veldeman
BACKGROUND AND PURPOSE: The safety of a simultaneous integrated boost (SIB) in combination with prone hypofractionated whole-breast irradiation (WBI) was investigated. MATERIALS AND METHODS: 167 patients were randomized between WBI with a sequential boost (SeB) or SIB. All patients were treated in prone position to 40.05Gy in 15 fractions to the whole breast. In the control arm, a SeB of 10Gy in 4 fractions (negative surgical margins) or 14.88Gy in 6 fractions (transsection) was prescribed...
January 3, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28049431/staphylococcal-enterotoxin-b-administration-in-pregnant-rats-alters-the-splenic-lymphocyte-response-in-adult-offspring-rats
#3
Ping Zhou, Xin-Sheng Zhang, Zhi-Ben Xu, Shu-Xian Gao, Qing-Wei Zheng, Ming-Zhu Xu, Lin Shen, Feng Yu, Jun-Chang Guan
BACKGROUND: Our previous study suggested that SEB exposure in pregnant rats could lead to the change of T cells subpopulation in both peripheral blood and thymus of the offspring rats. However, rarely is known about the influence of SEB exposure in pregnant rats on T cell subpopulation in the spleens of offspring rats. RESULTS: SEB was intravenously administered to the pregnant rats at gestational day 16 in this study. The percentages, in vivo and in vitro responses of CD4 and CD8 T cells were investigated with flow cytometry...
January 3, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28035011/invariant-nkt-cells-are-pathogenic-in-the-hla-dr4-transgenic-humanized-mouse-model-of-toxic-shock-syndrome-and-can-be-targeted-to-reduce-morbidity
#4
Peter A Szabo, Patrick T Rudak, Joshua Choi, Stacey X Xu, Robert Schaub, Bhagirath Singh, John K McCormick, S M Mansour Haeryfar
During toxic shock syndrome (TSS), bacterial superantigens trigger a polyclonal T cell response leading to a potentially catastrophic 'cytokine storm'. Whether innate-like invariant natural killer T(iNKT) cells, with remarkable immunomodulatory properties, participate in TSS is unclear. Using genetic and cell depletion approaches, we generated iNKT cell-deficient, superantigen-sensitive HLA-DR4-transgenic (DR4tg) mice, which were compared with their iNKT-sufficient counterparts for responsiveness to staphylococcal enterotoxin B(SEB)...
December 29, 2016: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28034578/staphylococcus-aureus-enterotoxin-sensitization-involvement-and-its-association-with-the-cysltr1-variant-in-different-asthma-phenotypes
#5
Hisako Matsumoto, Yoshihiro Kanemitsu, Tadao Nagasaki, Yuji Tohda, Takahiko Horiguchi, Hideo Kita, Kazunobu Kuwabara, Keisuke Tomii, Kojiro Otsuka, Masaki Fujimura, Noriyuki Ohkura, Katsuyuki Tomita, Akihito Yokoyama, Hiroshi Ohnishi, Yasutaka Nakano, Tetsuya Oguma, Soichiro Hozawa, Yumi Izuhara, Isao Ito, Tsuyoshi Oguma, Hideki Inoue, Tomoko Tajiri, Toshiyuki Iwata, Junya Ono, Shoichiro Ohta, Tomomitsu Hirota, Takahisa Kawaguchi, Mayumi Tamari, Tetsuji Yokoyama, Yasuharu Tabara, Fumihiko Matsuda, Kenji Izuhara, Akio Niimi, Michiaki Mishima
BACKGROUND: Sensitization to Staphylococcus aureus enterotoxin (SE) is a known risk factor for asthma susceptibility and severity. However, how SE sensitization is involved in asthma, particularly nonatopic asthma and/or late-onset asthma, remains uncertain. OBJECTIVE: To clarify the involvement of SE sensitization in nonatopic and/or late-onset asthma and its association with a polymorphism of the cysteinyl leukotriene receptor 1 gene (CysLTR1), which was examined because CysLT signaling is closely associated with late-onset eosinophilic asthma...
December 26, 2016: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/28024103/multiple-reaction-monitoring-for-multiplex-detection-of-three-bacterial-toxins-using-liquid-chromatography-tandem-mass-spectrometry
#6
Syed Imteyaz Alam, Annu Uppal, Pallavi Gupta, Dev Vrat Kamboj
Clostridium perfringens epsilon toxin (ETX), staphylococcal enterotoxin B (SEB), and shiga toxin (STX) are implicated in a number of diseases and food-borne intoxications and are considered as potential agents for bioterrorism and warfare. Artificially generated aerosol is the likely mode of delivery of these toxins for nefarious uses; potentially capable of causing mass destruction to human and animal health by inhalation of toxic bioaerosol. Multiplex and unambiguous detection of these agents is of paramount importance for emergency response in a biothreat scenario and for food safety...
December 26, 2016: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/28011677/n-acetylcysteine-in-preclinical-mouse-and-baboon-models-of-thrombotic-thrombocytopenic-purpura
#7
Claudia Tersteeg, Jan Roodt, Walter J Van Rensburg, Charlotte Dekimpe, Nele Vandeputte, Inge Pareyn, Aline Vandenbulcke, Barbara Plaimauer, Seb Lamprecht, Hans Deckmyn, José A Lopez, Simon F De Meyer, Karen Vanhoorelbeke
Thrombotic thrombocytopenic purpura (TTP) is a microangiopathic disorder diagnosed by thrombocytopenia and hemolytic anemia, associated with a deficiency in von Willebrand factor (VWF) cleaving protease ADAMTS13. Current treatment is based on plasma infusion for congenital TTP, or plasma exchange, often in combination with immunosuppressive agents, for acquired TTP. These treatment methods are however not always effective and therefore new treatment methods are highly necessary. N-acetylcysteine (NAC), an FDA-approved anti-mucolytic agent, could be a possible new treatment strategy for TTP as it was demonstrated to reduce disulfide bonds in VWF, thereby decreasing VWF multimer size and hence its prothrombotic potential...
December 23, 2016: Blood
https://www.readbyqxmd.com/read/28008711/a-proteomics-assay-to-detect-eight-cbrn-relevant-toxins-in-food
#8
Benoit Gilquin, Michel Jaquinod, Mathilde Louwagie, Sylvie Kieffer-Jaquinod, Alexandra Kraut, Myriam Ferro, François Becher, Virginie Brun
A proteomics assay was set up to analyze food substrates for eight toxins of the CBRN (chemical, biological, radiological and nuclear) threat, namely ricin, Clostridium perfringens epsilon toxin (ETX), Staphylococcus aureus enterotoxins (SEA, SEB and SED), shigatoxins from Shigella dysenteriae and entero-hemorragic Escherichia coli strains (STX1 and STX2) and Campylobacter jejuni cytolethal distending toxin (CDT). The assay developed was based on an antibody-free sample preparation followed by bottom-up LC-MS/MS analysis operated in targeted mode...
January 2017: Proteomics
https://www.readbyqxmd.com/read/28008571/reliability-of-the-ki67-labelling-index-in-core-needle-biopsies-of-luminal-breast-cancers-is-unaffected-by-biopsy-volume
#9
C M Focke, T Decker, P J van Diest
BACKGROUND: Assessing prognostic and predictive factors like the Ki67 labelling index (Ki67-LI) in breast cancer core needle biopsies (CNB) may be hampered by undersampling. Our aim was to arrive at a representative assessment of Ki67-LI in CNB of luminal breast cancers by defining optimal cutoffs and establishing the minimum CNB volume needed for highest concordance of Ki67-LI between CNB and subsequent surgical excision biopsy (SEB). METHODS: We assessed the Ki67-LI in CNB and subsequent SEB of 170 luminal breast cancers according to two counting methods recommended by the International Ki67 in Breast Cancer Working Group and applied the cutoffs to distinguish low and high proliferation given by the St Gallen 2013 and 2015 consensus, respectively...
December 22, 2016: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28002799/induction-of-specific-t-helper-9-cells-to-inhibit-glioma-cell-growth
#10
Haiyan Zheng, Baohua Yang, Dedong Xu, Wenbo Wang, Jie Tan, Liyuan Sun, Qinghua Li, Li Sun, Xuewei Xia
The effects of Staphylococcal enterotoxin B (SEB) on regulation of immune response have been recognized; whether SEB can enhance the effects of immunotherapy on glioma remains to be investigated. This study tests a hypothesis that administration with SEB enhances the effects of specific immunotherapy on glioma growth in mice. In this study, a glioma-bearing mouse model was developed by adoptive transfer with GL261 cells (a mouse glioma cell line). The mice were treated with the GL261 cell extracts (used as an Ag) with or without administration of SEB...
December 16, 2016: Oncotarget
https://www.readbyqxmd.com/read/27997374/stable-phantom-materials-for-ultrasound-and-optical-imaging
#11
Luciana C Cabrelli, Pedro I B G B Pelissari, Alessandro M Deana, Antonio A O Carneiro, Theo Z Pavan
Phantoms mimicking the specific properties of biological tissues are essential to fully characterize medical devices. Water-based materials are commonly used to manufacture phantoms for ultrasound and optical imaging techniques. However, these materials have disadvantages, such as easy degradation and low temporal stability. In this study, we propose an oil-based new tissue-mimicking material for ultrasound and optical imaging, with the advantage of presenting low temporal degradation. A styrene-ethylene/butylene-styrene (SEBS) copolymer in mineral oil samples was made varying the SEBS concentration between 5%-15%, and low-density polyethylene (LDPE) between 0%-9%...
December 20, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27982450/self-embedding-behavior-in-adults-a-report-of-two-cases-and-a-systematic-review
#12
Victor S Mannarino, Débora C S Pereira, Wagner S Gurgel, Carolina B F Costa, Alexandre M Valença, Leonardo F Fontenelle, Mauro V Mendlowicz
Self-embedding behavior (SEB) is the repeated insertion of sharp objects, such as needles or pins, into the soft tissues of abdomen, limbs, and other body parts. In this study, two cases of SEB were reported and the scientific worldwide literature reviewed. Thirty-two cases of SEB were identified through systematic searches in the main bibliographic databases. Mean age was 35 years (SD = 8.97). Just over two-thirds of the patients were female. Although the number of embedded objects could be as high as 200, major clinical and surgical complications were uncommon and mortality was null...
December 16, 2016: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/27974390/subinhibitory-concentrations-of-punicalagin-reduces-expression-of-virulence-related-exoproteins-by-staphylococcus-aureus
#13
Su-Hyun Mun, Ryong Kong, Yun-Soo Seo, Tian Zhou, Ok-Hwa Kang, Dong-Won Shin, Dong-Yeul Kwon
Staphylococcus aureus produces a number of virulence factors. The major virulence factors exhibited by S aureus include various antigens, enzymes, cytotoxins and exotoxins (e.g. hemolysins, enterotoxins and toxic shock syndrome toxin). In this report, we show the influence of punicalagin on the secretion of exoprotein from S aureus by western blotting, tumor necrosis factor (TNF) release assay and quantitative RT-PCR. When added to S aureus cultures at an OD600 of 0.9, graded subinhibitory concentrations of punicalagin reduced the production of α-toxin, SEA and SEB in methicillin-resistant Staphylococcus aureus in a dose-dependent manner...
November 2016: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/27958521/phase-correlation-between-four-wave-mixing-and-optical-fields-in-double-%C3%AE-type-atomic-system
#14
Taek Jeong, Han Seb Moon
We study the spectral features and phase of four-wave mixing (FWM) light according to the relative phase-noise of the optical fields coupled to a double Λ-type atomic system of the 5S<sub>1/2</sub>-5P<sub>1/2</sub> transition of <sup>87</sup>Rb atoms. We observe that the spectral shape of the FWM spectrum is identical to that of the two-photon absorption (TPA) spectrum due to two-photon coherence and that it is independent of the relative phase-noise of the pump light. From these results, we clarify that the two-photon coherence plays a very important role in the FWM process...
December 12, 2016: Optics Express
https://www.readbyqxmd.com/read/27955954/clinical-and-pathogenic-features-of-sccmec-type-ii-and-iv-methicillin-resistant-staphylococcus-aureus-in-japan
#15
Fujiko Mitsumoto-Kaseida, Masayuki Murata, Kazuhiro Toyoda, Yuiko Morokuma, Makiko Kiyosuke, Dongchon Kang, Norihiro Furusyo
Staphylococcal chromosomal cassette mec (SCCmec) type IV methicillin-resistant Staphylococcus aureus (MRSA) has rapidly disseminated in healthcare settings, and its characteristics in the United States and Europe are well known. Because Japanese SCCmec type IV MRSA clones are different and less well documented, this retrospective, single center study was done to determine and compare the characteristics of SCCmec type II and IV MRSA in Japan. For the analysis, 55 SCCmec type II and 101 type IV MRSA samples were collected from lower respiratory tract specimens or from skin or soft tissue...
February 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/27925510/passive-therapy-with-humanized-anti-staphylococcal-enterotoxin-b-antibodies-attenuates-systemic-inflammatory-response-and-protects-from-lethal-pneumonia-caused-by-staphylococcal-enterotoxin-b-producing-staphylococcus-aureus
#16
Melissa J Karau, Mulualem E Tilahun, Ashton Krogman, Barbara A Osborne, Richard A Goldsby, Chella S David, Jayawant N Mandrekar, Robin Patel, Govindarajan Rajagopalan
Drugs such as linezolid that inhibit bacterial protein synthesis may be beneficial in treating infections caused by toxigenic Staphylococcus aureus. As protein synthesis inhibitors have no effect on preformed toxins, neutralization of pathogenic exotoxins with anti-toxin antibodies may be beneficial in conjunction with antibacterial therapy. Herein, we evaluated the efficacy of human-mouse chimeric high-affinity neutralizing anti-staphylococcal enterotoxin B (SEB) antibodies in the treatment of experimental pneumonia caused by SEB-producing S...
December 7, 2016: Virulence
https://www.readbyqxmd.com/read/27921406/house-dust-mites-confer-a-distinct-immunological-feature-among-dermatitis
#17
Safa Baris, Ahmet Ozen, Tuba Akdeniz, Elif Karakoc-Aydiner, Ovgu Aydin, Hulya Ercan, Ismail Ogulur, Yildiz Camcioglu, Reha Cengizlier, Cuyan Demirkesen, Deniz Yucelten, Gulderen Demirel, Isil B Barlan
Atopic dermatitis (AD) is a heterogeneous disease with regard to clinical phenotype and natural history. We investigated T cell subtypes and cytokine responses in peripheral blood and skin lesions of AD patients with various sensitivities. Immunological studies were performed in 27 subjects: 9 house dust mite (HDM)-sensitized; 6 subjects with sensitizations other than HDM; 7 non-allergic AD patients and 5 healthy controls. Among those, skin biopsy samples of 13 subjects were evaluated for immunohistochemical analyses, as well...
August 2016: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/27906374/highly-bright-photon-pair-generation-in-doppler-broadened-ladder-type-atomic-system
#18
Yoon-Seok Lee, Sang Min Lee, Heonoh Kim, Han Seb Moon
We report a bright photon-pair source with a coincidence counting rate per input power (cps/mW) of tens of thousands, obtained via spontaneous four-wave mixing from a Doppler-broadened atomic ensemble of the 5S<sub>1/2</sub>-5P<sub>3/2</sub>-5D<sub>5/2</sub> transition of <sup>87</sup>Rb. The photon-pair generation rate is enhanced by the two-photon coherence contributions from almost all the atomic velocity groups in the Doppler-broadened ladder-type atomic system...
November 28, 2016: Optics Express
https://www.readbyqxmd.com/read/27902380/antimicrobial-resistance-profiling-and-molecular-typing-of-methicillin-resistant-staphylococcus-aureus-isolated-from-a-malaysian-teaching-hospital
#19
Ainihayati Noordin, Hassriana Fazzila Sapri, Nurul Azirah Mohamad Sani, Shih Kei Leong, Xin-Ee Tan, Toh Leong Tan, Noraziah Mohamad Zin, Hui-Min Neoh, Salasawati Hussin
The annual prevalence of methicillin-resistant Staphylococcus aureus (MRSA) in Malaysia has been estimated to be 30 % to 40 % of all S. aureus infections. Nevertheless, data on the antimicrobial resistance and genetic diversity of Malaysian MRSAs remain few. In 2009, we collected 318 MRSA strains from various wards of our teaching hospital located in Kuala Lumpur, the capital city of Malaysia, and performed antimicrobial susceptibility testing on these strains. The strains were then molecularly characterized via staphylococcal cassette chromosome (SCC) mec and virulence gene (cna, sea, seb, sec, sed, see, seg, seh, sei, eta, etb, Panton-Valentine leukocidin and toxic shock syndrome toxin-1) typing; a subset of 49 strains isolated from the intensive care unit was also typed using PFGE...
December 2016: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/27862492/self-perceived-health-status-and-sleep-quality-of-older-adults-living-in-community-after-elastic-band-exercises
#20
Shu-Ya Chan, Kuei-Min Chen
AIMS: To test the effectiveness of a 6-month Senior Elastic Band (SEB) exercise program on the self-perceived health status and sleep quality of older adults living in community settings. BACKGROUND: Health issues common among older adults living in community settings include poor physical and mental health conditions and sleep quality. Engagement in appropriate exercise programs facilitates alleviating these health issues among older adults. DESIGN: A quasi-experimental design was applied...
November 9, 2016: Journal of Clinical Nursing
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