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https://www.readbyqxmd.com/read/28820017/directive-and-nondirective-social-support-in-the-workplace-is-this-social-support-distinction-important-for-subjective-health-complaints-job-satisfaction-and-perception-of-job-demands-and-job-control
#1
Tone Langjordet Johnsen, Hege Randi Eriksen, Aage Indahl, Torill Helene Tveito
AIMS: Social support is associated with well-being and positive health outcomes. However, positive outcomes of social support might be more dependent on the way support is provided than the amount of support received. A distinction can be made between directive social support, where the provider resumes responsibility, and nondirective social support, where the receiver has the control. This study examined the relationship between directive and nondirective social support, and subjective health complaints, job satisfaction and perception of job demands and job control...
August 1, 2017: Scandinavian Journal of Public Health
https://www.readbyqxmd.com/read/28811486/detecting-human-melanoma-cell-re-differentiation-following-braf-or-heat-shock-protein-90-inhibition-using-photoacoustic-and-magnetic-resonance-imaging
#2
Anant Shah, Teresa Delgado-Goni, Teresa Casals Galobart, Slawomir Wantuch, Yann Jamin, Martin O Leach, Simon P Robinson, Jeffrey Bamber, Mounia Beloueche-Babari
Targeted therapies specific to the BRAF-MEK-ERK signaling pathway have shown great promise in the treatment of malignant melanoma in the last few years, with these drugs now commonly used in clinic. Melanoma cells treated using these agents are known to exhibit increased levels of melanin pigment and tyrosinase activity. In this study we assessed the potential of non-invasive imaging approaches (photoacoustic imaging (PAI) and magnetic resonance imaging (MRI)) to detect melanin induction in SKMEL28 human melanoma cells, following inhibition of Hsp90 and BRAF signaling using 17-AAG and vemurafenib, respectively...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28803697/tumor-necrosis-factor-alpha-gene-polymorphisms-and-haplotypes-in-egyptian-children-with-nephrotic-syndrome
#3
Doaa M Youssef, Amal S El-Shal, Samia Hussein, Khaled Salah, Abd El Rahman E Ahmed
BACKGROUND: Nephrotic syndrome (NS) characterized by complex pathogenesis and clinical course with relapses; and needs novel breakthroughs for decades. Polymorphisms of cytokines genes including tumor necrosis factor alpha (TNF-α)may influence susceptibility to NS as well as different patients' steroid responses. In the current study, we demonstrated the potential roles of TNF-α promoter gene polymorphisms [-238, -308, -863] and haplotypes in susceptibility to childhood NS. Also, elucidating their possible influence on patients' steroid response and serum TNF-α level...
August 10, 2017: Cytokine
https://www.readbyqxmd.com/read/28793157/association-of-previous-cesarean-delivery-with-surgical-complications-after-a-hysterectomy-later-in-life
#4
Sofie A I Lindquist, Neel Shah, Charlotte Overgaard, Christian Torp-Pedersen, Karin Glavind, Thomas Larsen, Avery Plough, Grace Galvin, Aage Knudsen
Importance: In recent decades, the global rates of cesarean delivery have rapidly increased. Nonetheless, the influence of cesarean deliveries on surgical complications later in life has been understudied. Objective: To investigate whether previous cesarean delivery increases the risk of reoperation, perioperative and postoperative complications, and blood transfusion when undergoing a hysterectomy later in life. Design, Setting, and Participants: This registry-based cohort study used data from Danish nationwide registers on all women who gave birth for the first time between January 1, 1993, and December 31, 2012, and underwent a benign, nongravid hysterectomy between January 1, 1996, and December 31, 2012...
August 9, 2017: JAMA Surgery
https://www.readbyqxmd.com/read/28783748/heat-shock-protein-90-localizes-to-the-surface-and-augments-virulence-factors-of-cryptococcus-neoformans
#5
Sharanya Chatterjee, Utpal Tatu
BACKGROUND: Thermotolerance is an essential attribute for pathogenesis of Cryptococcus as exemplified by the fact that only two species in the genus, which can grow at 37°C, are human pathogens. Species which have other virulence factors including capsule formation and melanisation, but lack the ability to propagate at 37°C are not pathogenic. In another related fungal pathogen, Candida albicans, heat shock protein 90 has been implicated to be a central player in commanding pathogenicity by governing yeast to hyphal transition and drug resistance...
August 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28764795/participation-of-14-3-3%C3%AE%C2%B5-and-14-3-3%C3%AE-proteins-in-the-phagocytosis-component-of-cellular-immune-response-in-aedes-mosquito-cell-lines
#6
Abel Trujillo-Ocampo, Febe Elena Cázares-Raga, Rosa María Del Angel, Fernando Medina-Ramírez, Leopoldo Santos-Argumedo, Mario H Rodríguez, Fidel de la Cruz Hernández-Hernández
BACKGROUND: Better knowledge of the innate immune system of insects will improve our understanding of mosquitoes as potential vectors of diverse pathogens. The ubiquitously expressed 14-3-3 protein family is evolutionarily conserved from yeast to mammals, and at least two isoforms of 14-3-3, the ε and ζ, have been identified in insects. These proteins have been shown to participate in both humoral and cellular immune responses in Drosophila. As mosquitoes of the genus Aedes are the primary vectors for arboviruses, causing several diseases such as dengue fever, yellow fever, Zika and chikungunya fevers, cell lines derived from these mosquitoes, Aag-2 from Aedes aegypti and C6/36 HT from Aedes albopictus, are currently used to study the insect immune system...
August 1, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28763030/the-binding-effect-of-proteins-on-medications-and-its-impact-on-electrochemical-sensing-antipsychotic-clozapine-as-a-case-study
#7
George E Banis, Thomas Winkler, Patricia Barton, Sheryl E Chocron, Eunkyoung Kim, Deanna L Kelly, Gregory F Payne, Hadar Ben-Yoav, Reza Ghodssi
Clozapine (CLZ), a dibenzodiazepine, is demonstrated as the optimal antipsychotic for patients suffering from treatment-resistant schizophrenia. Like many other drugs, understanding the concentration of CLZ in a patient's blood is critical for managing the patients' symptoms, side effects, and overall treatment efficacy. To that end, various electrochemical techniques have been adapted due to their capabilities in concentration-dependent sensing. An open question associated with electrochemical CLZ monitoring is whether drug-protein complexes (i...
August 1, 2017: Pharmaceuticals
https://www.readbyqxmd.com/read/28755457/randomized-controlled-crossover-trial-of-prevention-of-clindamycin-induced-gastrointestinal-signs-using-a-synbiotic-in-healthy-research-cats
#8
J E Stokes, J M Price, J C Whittemore
BACKGROUND: Synbiotics often are prescribed to limit antibiotic-associated gastrointestinal signs (AAGS) in cats, but data to support this recommendation are lacking. OBJECTIVE: To determine whether synbiotic co-administration mitigates AAGS in healthy research cats treated with clindamycin. ANIMALS: 16 healthy research cats. METHODS: A randomized, double-blinded, placebo-controlled, 2-way, 2-period, crossover study with a 6-week washout was performed...
July 29, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28752954/identification-of-gntr-as-regulator-of-the-glucose-metabolism-in-pseudomonas-aeruginosa
#9
Abdelali Daddaoua, Andrés Corral-Lugo, Juan-Luis Ramos, Tino Krell
In contrast to Escherichia coli, glucose metabolism in pseudomonads occurs exclusively through the Entner-Doudoroff (ED) pathway. This pathway, as well as the three routes to generate the initial ED pathway substrate, 6-phosphogluconate, are regulated by the PtxS, HexR and GtrS/GltR systems. With GntR (PA2320) we report here the identification of an additional regulator in Pseudomonas aeruginosa PAO1. GntR repressed its own expression as well as that of the GntP gluconate permease. In contrast to PtxS and GtrS/GltR, GntR did not modulate expression of the toxA gene encoding the exotoxin A virulence factor...
July 28, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28752301/gender-differences-in-the-association-of-elmo1-genetic-variants-with-type-2-diabetes-in-tunisian-arabs
#10
A Turki, S Mzoughi, N Mtitaoui, M Khairallah, H Marmouch, S Hammami, T Mahjoub, W Y Almawi
PURPOSE: Polymorphisms of the engulfment and cell motility 1 (ELMO1) gene were recently associated with type 2 diabetes (T2DM) and its complications. We investigated the association of rs10255208, rs7782979, and rs2041801 ELMO1 gene variants with T2DM in Tunisian Arabs. METHODS: Subjects comprised 900 T2DM patients and 600 normoglycemic controls. ELMO1 genotyping was done by PCR-RFLP; the contribution of ELMO1 variants to T2DM was analyzed by Haploview and regression analysis...
July 27, 2017: Journal of Endocrinological Investigation
https://www.readbyqxmd.com/read/28751898/comparative-analysis-of-chloroplast-psbd-promoters-in-terrestrial-plants
#11
Shuichi Shimmura, Mikio Nozoe, Shota Kitora, Satoko Kin, Shigeru Matsutani, Yoko Ishizaki, Yoichi Nakahira, Takashi Shiina
The transcription of photosynthesis genes encoded by the plastid genome is mainly mediated by a prokaryotic-type RNA polymerase called plastid-encoded plastid RNA polymerase (PEP). Standard PEP-dependent promoters resemble bacterial sigma-70-type promoters containing the so-called -10 and -35 elements. On the other hand, an unusual light- and stress-responsive promoter (psbD LRP) that is regulated by a 19-bp AAG-box immediately upstream of the -35 element has been mapped upstream of the psbD-psbC operon in some angiosperms...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28747435/search-for-dna-damage-by-human-alkyladenine-dna-glycosylase-involves-early-intercalation-by-an-aromatic-residue
#12
Jenna M Hendershot, Patrick J O'Brien
DNA repair enzymes recognize and remove damaged bases that are embedded in the duplex. To gain access, most enzymes use nucleotide flipping , whereby the target nucleotide is rotated 180 degree into the active site. In human alkyladenine DNA glycosylase (AAG), the enzyme that initiates base excision repair of alkylated bases, the flipped-out nucleotide is stabilized by intercalation of the side chain of tyrosine 162 that replaces the lesion nucleobase. Previous kinetic studies provided evidence for the formation of a transient complex that precedes the stable flipped-out complex, but it is not clear how this complex differs from nonspecific complexes...
July 26, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28742113/addition-of-17-allylamino-17-demethoxygeldanamycin-to-a-suboptimal-caspofungin-treatment-regimen-in-neutropenic-rats-with-invasive-pulmonary-aspergillosis-delays-the-time-to-death-but-does-not-enhance-the-overall-therapeutic-efficacy
#13
Jeannine M Refos, Alieke G Vonk, Marian T Ten Kate, Kimberly Eadie, Henri A Verbrugh, Irma A J M Bakker-Woudenberg, Wendy W J van de Sande
Caspofungin (CAS) which is used as salvage therapy in patients with invasive pulmonary aspergillosis (IPA) inhibits the 1,3-β-D-glucan synthesis in Aspergillus fumigatus. Inhibiting 1,3-β-D-glucan synthesis induces a stress response and in an invertebrate model it was demonstrated that inhibiting this response with geldamycin enhanced the therapeutic efficacy of CAS. Since geldamycin itself is toxic to mammalians, the therapeutic efficacy of combining geldamycin with CAS was not studied in rodent models. Therefore in this study we investigated if the geldamycin derivate 17-(allylamino)-17-demethoxygeldanamycin (17-AAG) was able to enhance the therapeutic efficacy of CAS in vitro and in our IPA model in transiently neutropenic rats...
2017: PloS One
https://www.readbyqxmd.com/read/28696071/conversion-of-cellulose-to-amphiphilic-alkyl-glycosides-catalyzed-by-aquivion-a-perfluorosulfonic-acid-polymer
#14
François Jérôme, Karine De Oliveira Vigier, Ayman Karam, Boris Estrine, Sinisa Marincovic, Claudio Oldani
Aquivion PFSA PW98 is an amphiphilic solid superacid capable of converting cellulose to Amphiphilic Alkyl Glycosides (AAG) in 85% yield (i.e. 97% selectivity). The present process involves (1) a mechanocatalytic depolymerization of cellulose followed by (2) a direct glycosylation with n-dodecanol. In comparison to H2SO4 and solid acid catalysts commonly employed in cellulose processing, Aquivion PFSA PW98 is not only recyclable but also exhibits superior catalytic performances in terms of yield, selectivity and reactor productivity...
July 11, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28693932/muscle-tissue-saturation-compared-with-muscle-tissue-perfusion-during-low-blood-flows-an-experimental-study
#15
Sisse Anette Thomassen, Benedict Kjærgaard, Aage Kristian Olsen Alstrup, Ole Lajord Munk, Jørgen Frøkiær, Anders Larsson, Bodil Steen Rasmussen
OBJECTIVE: To investigate whether changes in muscle tissue perfusion measured with positron emission tomography would be reflected by parallel changes in muscle tissue oxygen saturation (StO2) measured using near-infrared spectroscopy during high and low blood flow levels achieved using cardiopulmonary bypass (CPB) in an animal model. DESIGN: A prospective, randomized study. SETTING: Research laboratory, single institution. PARTICIPANTS: Eight pigs (69-71 kg)...
March 22, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28681940/transcriptional-regulation-of-runx2-by-hsp90-controls-osteosarcoma-apoptosis-via-the-akt-gsk-3%C3%AE-%C3%AE-catenin-signaling
#16
Gui-Hong Liang, Ning Liu, Ming-Tang He, Jie Yang, Zu-Jian Liang, Xue-Juan Gao, Ali Hasan Rahhal, Qing-Yu He, Huan-Tian Zhang, Zhen-Gang Zha
Osteosarcoma (OS) is the most malignant primary bone tumor in children and adolescents with limited treatment options and poor prognosis. Recently, aberrant expression of Runx2 has been found in OS, thereby contributing to the development and progression of OS. However, the upstream signaling molecules that regulate its expression in OS remain largely unknown. In the present study, we first confirmed that the inhibition of HSP90 with 17-AAG caused significant apoptosis of OS cells via a caspase-3-dependent mechanism, and that inhibition or knockdown of HSP90 by 17-AAG or siRNAs significantly suppressed mRNA and protein expression of Runx2...
July 6, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28666092/characterization-of-genome-in-tetraploid-sty-species-of-elymus-triticeae-poaceae-using-sequential-fish-and-gish
#17
Ruijuan Liu, Richard R-C Wang, Feng Yu, Xingwang Lu, Quanwen Dou
Genomes of ten species of Elymus, either presumed or known as tetraploid StY, were characterized using fluorescence in situ hybridization (FISH) and genomic in situ hybridization (GISH). These tetraploid species could be grouped into three categories. Type I included StY genome reported species-Roegneria pendulina, R. nutans, R. glaberrima, R. ciliaris, and Elymus nevskii, and StY genome presumed species-R. sinica, R. breviglumis, and R. dura, whose genome could be separated into two sets based on different GISH intensities...
June 30, 2017: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/28642708/myricitrin-protects-cardiomyocytes-from-hypoxia-reoxygenation-injury-involvement-of-heat-shock-protein-90
#18
Min Wang, Gui-Bo Sun, Yu-Yang Du, Yu Tian, Ping Liao, Xue-Song Liu, Jing-Xue Ye, Xiao-Bo Sun
Modulation of oxidative stress is therapeutically effective in ischemia/reperfusion (I/R) injury. Myricitrin, a naturally occurring phenolic compound, is a potent antioxidant. However, little is known about its effect on I/R injury to cardiac myocytes. The present study was performed to investigate the potential protective effect of myricitrin against hypoxia/reoxygenation (H/R)-induced H9c2 cardiomyocyte injury and its underlying mechanisms. Myricitrin pretreatment improved cardiomyocyte viability, inhibited ROS generation, maintained the mitochondrial membrane potential, reduced apoptotic cardiomyocytes, decreased the caspase-3 activity, upregulated antiapoptotic proteins and downregulated proapoptotic proteins during H/R injury...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28642202/engineering-of-multifunctional-temperature-sensitive-liposomes-for-synergistic-photothermal-photodynamic-and-chemotherapeutic-effects
#19
Tuan Hiep Tran, Hanh Thuy Nguyen, Nam Van Le, Thi Thu Phuong Tran, Jong Seong Lee, Sae Kwang Ku, Han-Gon Choi, Chul Soon Yong, Jong Oh Kim
Heterogeneity of cancer cells and drug resistance require multiple therapeutic approaches for comprehensive treatment. In this study, temperature-sensitive liposomes containing anti-cancer agent tanespimycin (17-AAG) and photosensitizer IR 820 were developed for combination of phototherapy and chemotherapy. The temperature-sensitive liposomes composed of DPPC, cholesterol, DSPE-PEG, 17-AAG, and IR 820 (LP-AI) at weight ratio of 35/15/3/2/2 were formulated as a thin film using extrusion and evaluated for particle size, morphology and drug release profile...
August 7, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28640540/the-effects-of-advanced-age-and-serum-%C3%AE-1-acid-glycoprotein-on-docetaxel-unbound-exposure-and-dose-limiting-toxicity-in-cancer-patients
#20
Hirotsugu Kenmotsu, Chiyo K Imamura, Akira Ono, Shota Omori, Kazuhisa Nakashima, Kazushige Wakuda, Tetsuhiko Taira, Tateaki Naito, Haruyasu Murakami, Toshiaki Takahashi, Yusuke Tanigawara
AIM: α1 -Acid glycoprotein (AAG), which is a major binding protein of docetaxel, is considered to be a determinant for docetaxel pharmacokinetics. However, there are no reports about the impact of serum AAG on pharmacokinetics and pharmacodynamics in elderly patients treated with docetaxel. The aim of this prospective study was to elucidate the effects of advanced age and serum AAG on docetaxel unbound exposure and neutropenia, dose-limiting toxicity, in cancer patients. METHODS: Docetaxel was administered at 60 mg/m(2) to 51 patients with non-small cell lung cancer, 17 of whom were ≥ 75 years of age...
June 22, 2017: British Journal of Clinical Pharmacology
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