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https://www.readbyqxmd.com/read/29454301/heteroassembled-gold-nanoparticles-with-sandwich-immunoassay-lspr-chip-format-for-rapid-and-sensitive-detection-of-hepatitis-b-virus-surface-antigen-hbsag
#1
Jinwoon Kim, Seo Yeong Oh, Shruti Shukla, Seok Bok Hong, Nam Su Heo, Vivek K Bajpai, Hyang Sook Chun, Cheon-Ho Jo, Bong Gill Choi, Yun Suk Huh, Young-Kyu Han
This study aimed to develop a more sensitive method for the detection of hepatitis B surface antigen (HBsAg) using heteroassembled gold nanoparticles (AuNPs). A single layered localized surface plasmon resonance (LSPR) chip format was developed with antigen-antibody reaction-based detection symmetry using AuNPs, which detected HBsAg at 10 pg/mL. To further improve the detection limit, a modified detection format was fabricated by fixing a secondary antibody (to form a heteroassembled sandwich format) to the AuNP monolayer, which enhanced the detection sensitivity by about 100 times...
February 7, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29453988/silencing-calreticulin-gene-might-protect-cardiomyocytes-from-angiotensin-ii-induced-apoptosis
#2
Wen Zhang, Zhiyue Liu, Yanmei Zhang, Qinxue Bao, Wenchao Wu, He Huang, Xiaojing Liu
AIMS: Calreticulin (CRT), as a chaperone, contributes to protein folding and quality control cycle. CRT is an important factor regulating Ca 2+ that participates in cell apoptosis. However, the function of CRT in the heart is still controversial. Therefore, we aimed to investigate the potential role of CRT in angiotensin II-induced cardiomyocytes apoptosis. MAIN METHODS: Primary cultured neonatal cardiomyocytes were stimulated with angiotensin II to induce the apoptosis...
February 14, 2018: Life Sciences
https://www.readbyqxmd.com/read/29453888/dual-transcriptomics-reveals-co-evolutionary-mechanisms-of-intestinal-parasite-infections-in-blue-mussels-mytilus-edulis
#3
Marieke E Feis, Uwe John, Ana Lokmer, Pieternella C Luttikhuizen, K Mathias Wegner
On theoretical grounds, antagonistic co-evolution between hosts and their parasites should be a widespread phenomenon but only received little empirical support so far. Consequently, the underlying molecular mechanisms and evolutionary steps remain elusive, especially in non-model systems. Here, we utilised the natural history of invasive parasites to document the molecular underpinnings of co-evolutionary trajectories. We applied a dual-species transcriptomics approach to experimental cross-infections of blue mussel Mytilus edulis hosts and their invasive parasitic copepods Mytilicola intestinalis from two invasion fronts in the Wadden Sea...
February 17, 2018: Molecular Ecology
https://www.readbyqxmd.com/read/29453831/evaluation-of-a-recombinant-multiepitope-antigen-for-diagnosis-of-hepatitis-c-virus-a-lower-cost-alternative-for-antigen-production
#4
Ronaldo Luis Thomasini, Hortencia Gisele Amaro Souza, Oscar Bruna-Romero, Antonio Helvecio Totola, Neiva Sellan Lopes Gonçales, Cristiano Xavier Lima, Mauro Martins Teixeira
BACKGROUND: The most of the hepatitis C-infected patients remain undiagnosed until they develop severe liver damage or submitted for serological screening. OBJECTIVE: To evaluate a recombinant multiepitope protein for detection of IgG anti-hepatitis C virus. METHOD: A synthetic gene was cloned, expressed in Escherichia coli, and the recombinant protein was purified. Human serum panel consisted of 88 positives (20 HCV genotyped) and 376 negatives for hepatitis C, 6 positives for human acquired immunodeficiency virus, 6 syphilis positives, 6 hepatitis B positives were tested by IgG antihepatitis C virus using the protein by enzyme-linked immunosorbent assay...
February 17, 2018: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/29453714/backbone-1-h-13-c-and-15-n-assignments-of-the-extracellular-region-of-human-fc%C3%AE-receptor-iiib
#5
Rina Yogo, Saeko Yanaka, Koichi Kato
Fcγ receptor (FcγR) promotes various immune responses through interactions with the Fc portion of immunoglobulin G (IgG). FcγRIIIb is a glycosylphosphatidylinositol-linked protein expressed on neutrophils and triggers degranulation and opsonic phagocytosis. The extracellular region of FcγR is composed of two Ig-fold domains and can be cleaved as a soluble form (sFcγRIIIb), which is also reactive with complement receptor type 3. Although structure and Fc interaction of sFcγRIIIb have been characterized by X-ray crystallography, little has been known about its structure in solution...
February 16, 2018: Biomolecular NMR Assignments
https://www.readbyqxmd.com/read/29453682/persistent-pulmonary-hypertension-and-histologic-chorioamnionitis-in-preterm-infants-controlled-study
#6
N Katz, Y Bar-Or, A Raucher-Sterrnfeld, A Tamir, D Kohelet
Persistent pulmonary hypertension (PPHN) of the newborn is one of the most challenging acute disorders of postnatal transition with substantial morbidity and mortality. The aim of the study was to find if there is an association between persistent pulmonary hypertension and histologic chorioamnionitis in preterm infants. 27 preterm infants with echocardiographic evidence of PPHN within the first 3 days of life were eligible for the study. A matched control group of 27 patients was chosen according to gestational age, date of birth, and gender...
February 16, 2018: Pediatric Cardiology
https://www.readbyqxmd.com/read/29453330/interphysician-agreement-on-subclassification-of-myocardial-infarction
#7
Anton Gard, Bertil Lindahl, Gorav Batra, Nermin Hadziosmanovic, Marcus Hjort, Karolina Elisabeth Szummer, Tomasz Baron
OBJECTIVE: The universal definition of myocardial infarction (MI) differentiates MI due to oxygen supply/demand mismatch (type 2) from MI due to plaque rupture (type 1) as well as from myocardial injuries of non-ischaemic or multifactorial nature. The purpose of this study was to investigate how often physicians agree in this classification and what factors lead to agreement or disagreement. METHODS: A total of 1328 patients diagnosed with MI at eight different Swedish hospitals 2011 were included...
February 16, 2018: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29453140/serum-apolipoprotein-a-1-concentrations-and-the-prevalence-of-cardiovascular-autonomic-neuropathy-in-individuals-with-type-2-diabetes
#8
Jin Ook Chung, Seon-Young Park, Ji Hyun Han, Dong Hyeok Cho, Dong Jin Chung, Min Young Chung
OBJECTIVE: To evaluate the relationship between levels of serum apolipoproteins and the prevalence of cardiovascular autonomic neuropathy (CAN) in type 2 diabetes. METHODS: In total, 3199 individuals with type 2 diabetes were investigated in a cross-sectional study. The diagnosis of CAN was made based on the results of a cardiovascular reflex test. Serum apolipoprotein A-I (apoA-I) and apolipoprotein B (apoB) levels were measured. RESULTS: Serum apoA-1 levels were significantly low in individuals with CAN, but there was no significant association between serum apoB levels and CAN...
January 31, 2018: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/29452973/the-alpha-defensin-test-for-diagnosing-periprosthetic-joint-infection-in-the-setting-of-an-adverse-local-tissue-reaction-secondary-to-a-failed-metal-on-metal-bearing-or-corrosion-at-the-head-neck-junction
#9
Kamil T Okroj, Tyler E Calkins, Erdan Kayupov, Michael M Kheir, Joshua S Bingham, Christopher P Beauchamp, Javad Parvizi, Craig J Della Valle
BACKGROUND: In patients with adverse local tissue reaction (ALTR) secondary to a failed metal-on-metal (MoM) bearing or corrosion at the head-neck junction in a metal-on-polyethylene bearing, ruling in or out periprosthetic joint infection (PJI) can be challenging. Alpha-defensin has emerged as an accurate test for PJI. The purpose of this multicenter, retrospective study was to evaluate the accuracy of the alpha-defensin synovial fluid test in detecting PJI in patients with ALTR. METHODS: We reviewed medical records of 26 patients from 3 centers with ALTR that had an alpha-defensin test performed...
January 16, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29452544/can-combined-blood-neutrophil-to-lymphocyte-ratio-and-c-reactive-protein-be-used-for-diagnosis-of-spontaneous-bacterial-peritonitis
#10
N Mousa, T Besheer, A Abdel-Razik, M Hamed, A G Deiab, T Sheta, W Eldars
BACKGROUND AND OBJECTIVE: Spontaneous bacterial peritonitis (SBP) is diagnosed by the presence of ≥250 polymorphonuclear neutrophils (PMN)/mm 3 in the ascites and the absence of surgically treatable cause of intra-abdominal infection. Blood neutrophil lymphocytic ratio (NLR) is an inexpensive and simple test for inflammation. C-reactive protein (CRP) is an inflammatory marker used for the diagnosis and follow-up of many diseases and morbidities. We aimed to evaluate the clinical utility of combined blood NLR and CRP as a non-invasive test for SBP diagnosis...
February 16, 2018: British Journal of Biomedical Science
https://www.readbyqxmd.com/read/29452335/change-in-cardiometabolic-risk-among-blacks-whites-and-hispanics-findings-from-the-health-and-retirement-study
#11
Uchechi A Mitchell, Jennifer A Ailshire, Eileen M Crimmins
Background: Blacks experience greater multi-system physiological dysregulation, or cumulative biological risk, which is associated with poor cardiometabolic health and mortality. In this study, we assess race differences in change in risk over four years among older whites, blacks and Hispanics. Method: We examined race differences in 4-year change in individual biomarkers and a cumulative measure of risk-cardiometabolic risk (CMR)-using data for each respondent from two waves of the Health and Retirement Study's biomarker assessment (n=5,512)...
February 14, 2018: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/29451960/direct-measurement-of-charge-regulation-in-metalloprotein-electron-transfer
#12
Collin T Zahler, Hongyu Zhou, Alireza Abdolvahabi, Rebecca L Holden, Sanaz Rasouli, Peng Tao, Bryan Shaw
Quantifying how a protein regulates its net electrostatic charge during electron transfer (ET) is a means of directly measuring factors that contribute to either redox potential and/or reorganization energy. Charge regulation by proteins during ET has never been measured because few tools exist to measure the net charge of a folded protein in solution at different oxidation states. Here, by using protein charge ladders and capillary electrophoresis, we determined that the net charge of myoglobin, cytochrome c, and azurin changed by 0...
February 16, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29451940/patient-factors-associated-with-methicillin-resistant-staphylococcus-aureus-septic-arthritis-in-children
#13
Derek T Bernstein, Lee S Haruno, Shiva Daram, John R Dawson, Wei Zhang, Scott B Rosenfeld
Staphylococcus aureus is the most common causative organism in pediatric septic arthritis, with methicillin-resistant Staphylococcus aureus (MRSA) being responsible for a significant portion of these infections. Early identification and initiation of proper treatment may improve outcomes by minimizing potential morbidity. The purpose of this study was to identify variables obtained on initial patient presentation associated with MRSA septic arthritis. Sixteen factors were retrospectively evaluated in 109 consecutive pediatric patients diagnosed with culture-confirmed septic arthritis...
February 16, 2018: Orthopedics
https://www.readbyqxmd.com/read/29451894/trade-off-between-synergy-and-efficacy-in-combinations-of-hiv-1-latency-reversing-agents
#14
Vipul Gupta, Narendra M Dixit
Eradicating HIV-1 infection is difficult because of the reservoir of latently infected cells that gets established soon after infection, remains hidden from antiretroviral drugs and host immune responses, and retains the capacity to reignite infection following the cessation of treatment. Drugs called latency-reversing agents (LRAs) are being developed to reactivate latently infected cells and render them susceptible to viral cytopathicity or immune killing. Whereas individual LRAs have failed to induce adequate reactivation, pairs of LRAs have been identified recently that act synergistically and hugely increase reactivation levels compared to individual LRAs...
February 16, 2018: PLoS Computational Biology
https://www.readbyqxmd.com/read/29451686/an-iminium-ion-metabolite-hampers-the-production-of-the-pharmacologically-active-metabolite-of-a-multikinase-inhibitor-kw-2449-in-primates-irreversible-inhibition-of-aldehyde-oxidase-and-covalent-binding-with-endogenous-proteins
#15
Jun Hosogi, Rui Ohashi, Hiroshi Maeda, Kazuhiro Fujita, Junko Ushiki, Takashi Kuwabara, Yorihiro Yamamoto, Toru Imamura
We previously reported that KW-2449, (E)-1-{4-[2-(1H-Indazol-3-yl)vinyl]benzoyl}piperazine, a novel multikinase inhibitor developed for the treatment of leukemia patients, was oxidized to an iminium ion intermediate by monoamine oxidase B (MAO-B) and then converted to its oxo-piperazine form (M1) by aldehyde oxidase (AO). However, we found that the significant decrease in the pharmacologically active metabolite M1 following repeated administration of KW-2449 in primates might hamper the effectiveness of the drug...
February 16, 2018: Biopharmaceutics & Drug Disposition
https://www.readbyqxmd.com/read/29451658/clinical-correlation-of-biopsy-results-in-patients-with-temporal-arteritis
#16
Volkan Yuksel, Orkut Guclu, Ebru Tastekin, Umit Halici, Serhat Huseyin, Volkan Inal, Suat Canbaz
OBJECTIVE: Temporal arteritis is systemic vasculitis of medium and large sized vessels. The lowest incidence rates were reported in Turkey, Japan and Israel. We aimed to investigate the results of patients with biopsy-proven temporal arteritis and those classified according to the American College of Rheumatology criteria from a low-incidence region for temporal arteritis. The results of our study are noteworthy, since there is limited data on pathologic diagnosis of temporal arteritis in Turkey...
November 2017: Revista da Associação Médica Brasileira
https://www.readbyqxmd.com/read/29451472/hepcidin-and-proinflammatory-markers-in-children-with-chronic-kidney-disease-a-case-control-study
#17
Kamal Kumar Goyal, Abhijeet Saha, Puneet Kaur Sahi, Manpreet Kaur, Nand Kishore Dubey, Parul Goyal, Ashish Dutt Upadhayay
BACKGROUND: Hepcidin is the main regulator of hepcidin-ferroportin axis and is elevated in children with chronic kidney disease (CKD). Anemia of CKD and its relation to hepcidin, interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), and high-sensitivity C-reactive protein (hs-CRP) in iron- and erythropoietin (EPO)-naïve, non-dialyzed children with CKD is under-studied. MATERIALS AND METHODS: This case-control study aimed to study the levels of hepcidin and other proinflammatory markers (IL-6, TNF-α, hs-CRP) and their relation with anemia in iron- and erythropoietin-naïve, non-dialysis CKD (stage 3 - 5) patients...
February 16, 2018: Clinical Nephrology
https://www.readbyqxmd.com/read/29451338/can-dimedone-be-used-to-study-selenoproteins-an-investigation-into-the-reactivity-of-dimedone-towards-oxidized-forms-of-selenocysteine
#18
N Connor Payne, Drew R Barber, Erik L Ruggles, Robert J Hondal
Dimedone is a widely used reagent to assess the redox state of cysteine-containing proteins as it will alkylate sulfenic acid residues, but not sulfinic acid residues. While it has been reported that dimedone can label selenenic acid residues in selenoproteins, we investigated the stability, and reversibility of this label in a model peptide system. We also wondered whether dimedone could be used to detect seleninic acid residues. We used benzenesulfinic acid, benzeneseleninic acid, and model selenocysteine-containing peptides to investigate possible reactions with dimedone...
February 16, 2018: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/29451149/a-study-on-clinical-characteristics-and-magnetic-resonance-imaging-manifestations-on-systemic-rosai-dorfman-disease
#19
Xiao Cheng, Jing-Liang Cheng, An-Kang Gao
Background: Rosai-Dorfman disease (RDD) is typically characterized by painless bilateral and symmetrical cervical lymphadenopathy, with associated fever and leukocytosis. The aim of the current study was to summarize the clinical features and imaging characteristics of RDD, in an effort to improve its diagnostic accuracy. Methods: The study was analyzed from 32 patients between January 2011 and December 2017; of these, 16 patients had pathologically diagnosed RDD, eight had pathologically diagnosed meningioma, and eight pathologically diagnosed lymphoma...
February 20, 2018: Chinese Medical Journal
https://www.readbyqxmd.com/read/29451141/associations-between-body-composition-indices-and-metabolic-disorders-in-chinese-adults-a-cross-sectional-observational-study
#20
Rong Zhang, Sheng-Yong Dong, Fei Wang, Cong Ma, Xiao-Lan Zhao, Qiang Zeng, Ao Fei
Background: Obesity induces dyslipidemia, hypertension, glucose intolerance, and inflammatory state, which results in atherogenic processes, diabetes, and cardiovascular disease. We usually use body composition indices, such as body mass index (BMI), body fat percentage (BFP), waist circumference-height ratio (WHtR), and waist-hip ratio (WHR) to reflect the obesity. The aim of this large population-based cross-sectional study was to investigate the associations between body composition indices and metabolic parameters in Chinese adults...
February 20, 2018: Chinese Medical Journal
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