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https://www.readbyqxmd.com/read/29678950/mapping-interaction-sites-on-human-chemokine-receptors-by-deep-mutational-scanning
#1
Jeremiah D Heredia, Jihye Park, Riley J Brubaker, Steven K Szymanski, Kevin S Gill, Erik Procko
Chemokine receptors CXCR4 and CCR5 regulate WBC trafficking and are engaged by the HIV-1 envelope glycoprotein gp120 during infection. We combine a selection of human CXCR4 and CCR5 libraries comprising nearly all of ∼7000 single amino acid substitutions with deep sequencing to define sequence-activity landscapes for surface expression and ligand interactions. After consideration of sequence constraints for surface expression, known interaction sites with HIV-1-blocking Abs were appropriately identified as conserved residues following library sorting for Ab binding, validating the use of deep mutational scanning to map functional interaction sites in G protein-coupled receptors...
April 20, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29678884/physiological-temperatures-reduce-dimerization-of-dengue-and-zika-virus-recombinant-envelope-proteins
#2
Stephan T Kudlacek, Lakshmanane Premkumar, Stefan W Metz, Ashutosh Tripathy, Andrey A Bobkov, Alexander Matthew Payne, Stephen Graham, James A Brackbill, Michael J Miley, Aravinda M de Silva, Brian Kuhlman
The spread of dengue (DENV) and Zika virus (ZIKV) is a major public health concern. The primary target of antibodies (Abs) that neutralize DENV and ZIKV is the envelope (E) glycoprotein, and there is interest in using soluble recombinant E (sRecE) proteins as subunit vaccines. However, the most potent neutralizing antibodies against DENV and ZIKV recognize epitopes on the virion surface that span two or more E proteins. Therefore, to create effective DENV and ZIKV vaccines, presentation of these quaternary epitopes may be necessary...
April 20, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29677005/maged2-a-novel-form-of-antenatal-bartter-s-syndrome
#3
Martin Kömhoff, Kamel Laghmani
PURPOSE OF REVIEW: Antenatal Bartter's syndrome (aBS) is the most severe form of Bartter's syndrome, requiring close follow-up, in particular during the neonatal period, primarily because of prematurity. The recent identification of a novel and very severe form of aBS merits an update on this topic. RECENT FINDING: Despite the identification of several genes involved in Bartter's syndrome, about 20% of patients clinically diagnosed with aBS remained without genetic explanation for decades...
April 18, 2018: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/29672377/a-pain-in-the-abs-predicting-post-cesarean-analgesia
#4
Jonathan P Wanderer, Naveen Nathan
No abstract text is available yet for this article.
May 2018: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29668583/a-prisma-systematic-review-and-meta-analysis-on-chlamydia-trachomatis-infections-in-iranian-women-1986-2015
#5
Daem Roshani, Rashid Ramazanzadeh, Fariba Farhadifar, Amjad Ahmadi, Safoura Derakhshan, Samaneh Rouhi, Shamsi Zarea, Farnaz Zandvakili
BACKGROUND: Chlamydia trachomatis (CT) is the cause of genital tract infections in women. Some evidence has shown the role of this infection with CT in spontaneous abortions. The purpose of this study is to study the frequency of CT infection in Iranian women. METHODS: This study was performed based on PRISMA guidelines. A total of 75 articles published in Google Scholar, PubMed, ISI Web of Science, Biological abs, Iranmedex, SID, and Scopus databases were found (1986-2015) using the following keywords: CT in women, CT and Iranian women, CT and infection in Iran, CT and pregnancy in Iran, CT and preterm delivery in Iran, CT and preterm labor in Iran, CT and fertility in Iran, CT and infertility in Iran, and CT and abortion in Iran...
April 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29668252/multielement-determination-of-trace-heavy-metals-in-water-by-microwave-induced-plasma-atomic-emission-spectrometry-after-extraction-in-unconventional-single-salt-aqueous-biphasic-system
#6
Svetlana Smirnova, Tatiana Samarina, Dmitry Ilin, Igor V Pletnev
For the first time liquid-liquid extraction was used for the preconcentration of heavy metals prior to their determination in water by microwave-induced plasma atomic emission spectrometry (MP-AES). Extraction of Pb(II), Cd(II), Co(II), Ni(II), Zn(II), and Cu(II) was performed in unconventional aqueous biphasic system (ABS) formed by addition of hydrophobic solid salt, namely, tetrahexylammonium bromide, to aqueous sample, with neither organic solvents nor salting-out agents being used. The metal ions were quantitatively recovered with 4-(2-pyridylazo)-resorcinol (PAR)...
April 18, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29667491/optimization-of-3d-print-material-for-the-recreation-of-patient-specific-temporal-bone-models
#7
Max Haffner, Austin Quinn, Tsung-Yen Hsieh, E Bradley Strong, Toby Steele
OBJECTIVE: Identify the 3D printed material that most accurately recreates the visual, tactile, and kinesthetic properties of human temporal bone Subjects and Methods: Fifteen study participants with an average of 3.6 years of postgraduate training and 56.5 temporal bone (TB) procedures participated. Each participant performed a mastoidectomy on human cadaveric TB and five 3D printed TBs of different materials. After drilling each unique material, participants completed surveys to assess each model's appearance and physical likeness on a Likert scale from 0 to 10 (0 = poorly representative, 10 = completely life-like)...
May 2018: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/29667233/ankaferd-blood-stopper-as-a-new-strategy-to-avoid-early-complications-after-transradial-procedures-a-randomized-clinical-trial
#8
Sevket Gorgulu, Tugrul Norgaz, Ilke Sipahi
BACKGROUND: We planned a three arm randomized study to evaluate the safety and efficacy of a new blood stopper, Ankaferd blood stopper (ABS) along with short-time compression, compared to either short-time compression with conventional sterile gauzes (CSG) or with a TR band after transradial (TRA) procedures. METHODS: The Ankaferd blood stopper as a new strategy to avoid early complications. After transradial procedures (ABS transradial) trial is designed in a prospective, randomized, placebo-controlled fashion and registered with http://clinicaltrials...
April 17, 2018: Journal of Interventional Cardiology
https://www.readbyqxmd.com/read/29663742/degenerative-effect-of-ankaferd-blood-stopper%C3%A2-on-mice-peripheral-sensory-neurons-in-vitro
#9
Ramazan Üstün, Elif Kaval Oğuz
Ankaferd Blood Stopper® (ABS) is a licensed medicinal herbal extract that ensures effective hemostasis on external, internal, postoperative and dental bleeds. Dorsal root ganglia (DRG) harbor cell bodies of peripheral sensory neurons. DRG neurons receive peripheral information and regularly send projections to nuclei in the brainstem and the spinal cord. These neurons play critical roles in neural development. Neuronal dysfunctions were reported due to ABS use in surgical interventions. The purpose of this experiment was to investigate the degenerative effects of the ABS on mice DRG cells <I>in vitro</I>...
2018: Folia Neuropathologica
https://www.readbyqxmd.com/read/29661828/nasopharyngeal-exposure-to-streptococcus-pneumoniae-induces-extended-age-dependent-protection-against-pulmonary-infection-mediated-by-antibodies-and-cd138-cells
#10
Elsa N Bou Ghanem, Nang H Tin Maung, Nalat Siwapornchai, Aaron E Goodwin, Stacie Clark, Ernesto J Muñoz-Elías, Andrew Camilli, Rachel M Gerstein, John M Leong
Streptococcus pneumoniae commonly resides asymptomatically in the nasopharyngeal (NP) cavity of healthy individuals but can cause life-threatening pulmonary and systemic infections, particularly in the elderly. NP colonization results in a robust immune response that protects against invasive infections. However, the duration, mechanism, and cellular component of such responses are poorly understood. In this study, we found that repeated NP exposure of mice to S. pneumoniae TIGR4 strain results in pneumococcal-specific Ab responses that protect against lethal lung challenge...
April 16, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29661785/the-prevalence-of-the-metabolic-syndrome-and-associated-cardiovascular-complications-in-adult-onset-ghd-during-gh-replacement-a-kims-analysis
#11
Johan Verhelst, Anders Mattsson, Cecilia Camacho-Hubner, Anton Luger, Roger Abs
BACKGROUND: Adult-onset GH deficiency (AO-GHD) is associated with a increased prevalence of the metabolic syndrome (MetS). AIM: To determine the effect of GH replacement on the prevalence of MetS in AO-GHD and to study the impact of MetS on the incidence of cardiovascular events during GH replacement. PATIENTS AND METHODS: 1449 AO-GHD patients (males 48.9%; mean age 48.9 ± 12.8 yr) were retrieved from KIMS (Pfizer International Metabolic Database)...
April 16, 2018: Endocrine Connections
https://www.readbyqxmd.com/read/29661538/an-unusual-case-of-anti-mog-cns-demyelination-with-concomitant-mild-anti-nmdar-encephalitis
#12
Jiajia Zhou, Winwen Tan, Suyin Elaine Tan, Jing Hu, Zhongqin Chen, Kang Wang
We report the case of a patient who presented with progressive unsteadiness and narcoleptic attacks followed by behavioral change and psychosis, without visual disturbances or seizures. MRI revealed multiple areas of fluid attenuation inversion recovery (FLAIR) high-intensity lesions involving the cerebellum, brainstem, thalamus and third ventricular peri-ependymal region consistent with demyelination. Both the serum myelin oligodendrocyte glycoprotein-antibodies (MOG-Abs) and cerebral spinal fluid (CSF) anti-N-methyl-d-as-partate receptor (NMDAR) antibodies were positive using transfected cell based assays...
April 6, 2018: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/29658982/behavioural-changes-in-patients-with-intellectual-disability-treated-with-brivaracetam
#13
E Andres, F Kerling, H Hamer, M Winterholler
OBJECTIVE: The purpose of this study was to evaluate the tolerability and efficacy of brivaracetam (BRV) in residential patients at our epilepsy centre. PATIENTS AND METHODS: We assessed retrospectively 33 patients (14 females; mean age 38.2 years, with range 17-63 years) with intellectual disability (ID) and drug-resistant epilepsy using an industry-independent, non-interventional study design based on standardized daily seizure records. Mean seizure frequency was compared between the 3-month baseline period and subsequent 3-month treatment period...
April 16, 2018: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/29657523/comparison-of-osteoclastogenesis-and-local-invasiveness-of-ameloblastoma-and-keratocystic-odontogenic-tumor
#14
Natheer H Al-Rawi, Ammar K Al-Siraj, Ahlam H Majeed
Objectives: The aim of this study was to compare the expression of receptor-activated nuclear factor kappa B (RANK) with its ligand (RANKL) and matrix metalloproteinase-2 (MMP2) in solid/multicystic ameloblastomas (ABs) and keratocystic odontogenic tumors (KOTs). Materials and Methods: The expression of MMP2, RANK, and RANKL molecules was evaluated in 13 ABs and 14 KOTs by immunohistochemistry. The expressions were calculated in the odontogenic epithelial cells as well as the stromal cells...
January 2018: European Journal of Dentistry
https://www.readbyqxmd.com/read/29653402/long-term-exposure-to-airborne-particulate-matter-and-no-2-and-prevalent-and-incident-metabolic-syndrome-results-from-the-heinz-nixdorf-recall-study
#15
Clara Matthiessen, Sarah Lucht, Frauke Hennig, Simone Ohlwein, Hermann Jakobs, Karl-Heinz Jöckel, Susanne Moebus, Barbara Hoffmann
INTRODUCTION: Recently, epidemiological studies have found a link between air pollution (AP) and individual components of the metabolic syndrome (MetS), a condition predisposing to cardiometabolic diseases. However, very few studies have explored a possible association between air pollution and MetS. OBJECTIVE: We analyzed the effects of long-term exposure to airborne particulate matter and NO2 on prevalence and incidence of MetS. METHODS: We used data of the population-based prospective Heinz Nixdorf Recall study (baseline 2000-2003) to investigate the association(s) between AP exposure and MetS prevalence at baseline (n = 4457) and MetS incidence at first follow-up visit (n = 3074; average follow-up: 5...
April 10, 2018: Environment International
https://www.readbyqxmd.com/read/29653011/-advance-in-clinical-research-on-antley-bixler-syndrome
#16
Min Xie, Hongying Wang, Linqi Chen, Haibo Li, Hong Li
Antley-Bixler syndrome (ABS) is a rare childhood disorder affecting skeletal development. Some patients may also have genital anomalies and impaired steroidogenesis. Diagnostic criteria for ABS has not been fully established, though craniosynostosis, midface hypoplasia and elbow synostosis are minimum requirements. The etiology of ABS is complex, which included autosomal dominant form caused by FGFR2 gene mutations, autosomal recessive form caused by POR gene mutations, and high oral dose of fluconazole during pregnancy...
April 10, 2018: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/29651286/iga-targeting-human-immunodeficiency-virus-1-envelope-gp41-triggers-antibody-dependent-cellular-cytotoxicity-cross-clade-and-cooperates-with-gp41-specific-igg-to-increase-cell-lysis
#17
Maxence Duchemin, Marwa Khamassi, Lin Xu, Daniela Tudor, Morgane Bomsel
The protective efficacy of human immunodeficiency virus-1 (HIV-1) antibodies (Abs) remains mostly correlated with their in vitro neutralizing activity engaging their Fab region. However, anti-HIV-1 Abs also mediate a broad array of Fc-mediated effector functions including Ab-dependent cellular cytotoxicity (ADCC), which depend primarily on the Ab isotype. While ADCC is commonly associated with HIV-1 gp120 envelope-specific IgGs, whether IgAs, especially those targeting the HIV-1 gp41 envelope, also mediate ADCC remains elusive...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29651222/toward-3d-printed-hydrogen-storage-materials-made-with-abs-mof-composites
#18
Megan N Channell, Makfir Sefa, James A Fedchak, Julia Scherschligt, Michael Bible, Bharath Natarajan, Nikolai N Klimov, Abigail E Miller, Zeeshan Ahmed, Matthew R Hartings
The push to advance efficient, renewable, and clean energy sources has brought with it an effort to generate materials that are capable of storing hydrogen. Metal-organic framework materials (MOFs) have been the focus of many such studies as they are categorized for their large internal surface areas. We have addressed one of the major shortcomings of MOFs (their processibility) by creating and 3D printing a composite of acrylonitrile butadiene styrene (ABS) and MOF-5, a prototypical MOF, which is often used to benchmark H2 uptake capacity of other MOFs...
February 2018: Polymers for Advanced Technologies
https://www.readbyqxmd.com/read/29648780/effective-bioactivity-retention-of-low-concentration-antibodies-on-hfbi-modified-fluorescence-icts-for-sensitive-and-rapid-detection-of-psa
#19
Bo Zhang, Weichen Gao, Jiafang Piao, Yunjie Xiao, Bin Wang, Weipan Peng, Xiaoqun Gong, Zefang Wang, Haitao Yang, Jin Chang
Nowadays, increasing analytical sensitivity is still a big challenge in constructing membrane-based fluorescence immunochromatography test strip (FICTS). However, the bioactivity of antibody (Ab) immobilized on the test line (T line) of porous nitrocellulose membrane (PNM), which directly influences the analytical sensitivity, is less studied. In this work, a novel amphiphilic hydrophobin (HFBI) protein was introduced to modify the T line to effectively retain the Abs' bioactivity. The results indicated that HFBI could self-assemble on the PNM and immobilize the Abs in the "stand-up" orientation...
April 12, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29643191/cd83-antibody-inhibits-human-b-cell-responses-to-antigen-as-well-as-dendritic-cell-mediated-cd4-t-cell-responses
#20
Kuan Y Wong, Rebecca Baron, Therese A Seldon, Martina L Jones, Alison M Rice, David J Munster
Anti-CD83 Ab capable of Ab-dependent cellular cytotoxicity can deplete activated CD83+ human dendritic cells, thereby inhibiting CD4 T cell-mediated acute graft-versus-host disease. As CD83 is also expressed on the surface of activated B lymphocytes, we hypothesized that anti-CD83 would also inhibit B cell responses to stimulation. We found that anti-CD83 inhibited total IgM and IgG production in vitro by allostimulated human PBMC. Also, Ag-specific Ab responses to immunization of SCID mice xenografted with human PBMC were inhibited by anti-CD83 treatment...
April 11, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
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