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https://www.readbyqxmd.com/read/28651292/acute-onset-neurological-disorders-during-pregnancy-a-literature-review
#1
Zita Ferraz, Joana Parra, Ana Luísa Areia, Elsa Vasco, Paulo Moura
Objectives To characterize the most common peripheral and central neurological disorders during pregnancy. Methods Original research and review of the literature on neurological complications during pregnancy. We searched for keywords related to the topic on different databases. Results Pregnancy involves physiological changes that can trigger peripheral neurological and/or central nervous system pathologies, which can sometimes be associated with hypertensive disorders. A definitive diagnosis of neurological disorders can be made according to the trimester of pregnancy and the clinical findings...
June 26, 2017: Revista Brasileira de Ginecologia e Obstetrícia
https://www.readbyqxmd.com/read/28651195/stereological-and-biophysical-characteristics-of-the-ovine-surfactant-system-and-its-changes-caused-by-ovine-pulmonary-adenocarcinoma
#2
Ariane Jörger, Christa Acevedo, Diana Busley, Martin Ganter, Andreas Schmiedl, Esther Humann-Ziehank
Surfactant covers the inner surface of lung alveoli and lowers the surface tension to prevent alveoli from collapsing. A lack of surfactant or its dysfunction causes dyspnea. The Jaagsiekte Sheep Retrovirus (JSRV) causes ovine pulmonary adenocarcinoma (OPA), whose typical clinical appearance is fluid running from nostrils. This fluid might contain surfactant as alveolar type II pneumocytes (AEII) are target cells for JSRV. Therefore, the progressive dyspnea during OPA might be caused partially by surfactant alterations...
June 15, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28651089/validation-of-commercial-real-time-pcr-arrays-for-environmental-risk-assessment-application-to-the-study-of-p-p%C3%A2-dde-toxicity-in-mus-spretus-mice-liver
#3
Noelia Morales-Prieto, Carmen Pueyo, Nieves Abril
Data on gene transcription profiles provide a comprehensive assessment of the toxic and defensive mechanisms that are triggered by pollutants. PCR-arrays have emerged as a reliable tool for analyzing the expression of a panel of relevant, pathway- or disease-focused genes under uniform cycling conditions. By using SYBR Green-optimized primer assays, it is possible to simultaneously amplify a sample with high specificity and amplification efficiencies. However, commercial PCR-arrays target a limited group of organisms, excluding most of those with environmental relevance, as is the case with Mus spretus mice...
June 23, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28651086/age-at-first-febrile-seizure-correlates-with-perinatal-maternal-emotional-symptoms
#4
Fanny Thébault-Dagher, Catherine M Herba, Jean R Séguin, Gina Muckle, Sonia J Lupien, Lionel Carmant, Marie-Noëlle Simard, Gabriel D Shapiro, William D Fraser, Sarah Lippé
OBJECTIVE: Prenatal exposure to stress and fever are factors lowering seizure threshold in animal models. The fever effect on seizure threshold is well documented in human infants, however the associations between maternal perinatal stress and infants' susceptibility to seizures is unknown. This is the first study in humans to investigate longitudinally, whether in humans, the effect of maternal perinatal emotional symptoms such as stress, anxiety and depression that may trigger a biological stress response on age at first seizure occurrence...
June 10, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28651081/inactivation-of-pathogenic-microorganisms-in-freshwater-using-hso5-uv-a-led-and-hso5-m-n-uv-a-led-oxidation-processes
#5
Jorge Rodríguez-Chueca, Tatiana Silva, José R Fernandes, Marco S Lucas, Gianluca Li Puma, José A Peres, Ana Sampaio
Freshwater disinfection using photolytic and catalytic activation of peroxymonosulphate (PMS) through PMS/UV-A LED and PMS/M(n+)/UV-A LED [M(n+) = Fe(2+) or Co(2+)] processes was evaluated through the inactivation of three different bacteria: Escherichia coli (Gram-negative), Bacillus mycoides (sporulated Gram-positive), Staphylococcus aureus (non-sporulated Gram-positive), and the fungus Candida albicans. Photolytic and catalytic activation of PMS were effective in the total inactivation of the bacteria using 0...
June 10, 2017: Water Research
https://www.readbyqxmd.com/read/28651009/interleukin-4-receptor-alpha-is-still-required-after-th2-polarization-for-the-maintenance-and-the-recall-of-protective-immunity-to-nematode-infection
#6
Justin Komguep Nono, Hlumani Ndlovu, Nada Abdel Aziz, Thabo Mpotje, Lerato Hlaka, Frank Brombacher
There is currently no vaccine against parasitic nematodes and the knowledge on the mechanisms by which protective immunity against this class of parasites is achieved is continuously expanding. Nematode parasites trigger a host protective type 2 immune response via interleukin-4 receptor alpha (IL-4Rα). Despite this central role, it is not known whether IL-4Rα has a role in maintaining host type 2 immune responses following polarization. To determine the role of IL-4Rα after polarization, we used a recently established strain of rosaCreERT2-/+IL-4Rα-/Lox mice where il4rα gene deletion can be temporally controlled...
June 26, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28650963/a-new-mechanistic-approach-for-the-further-development-of-a-population-with-established-size-bimodality
#7
Lisa Heermann, Donald L DeAngelis, Jost Borcherding
Usually, the origin of a within-cohort bimodal size distribution is assumed to be caused by initial size differences or by one discrete period of accelerated growth for one part of the population. The aim of this study was to determine if more continuous pathways exist allowing shifts from the small to the large fraction within a bimodal age-cohort. Therefore, a Eurasian perch population, which had already developed a bimodal size-distribution and had differential resource use of the two size-cohorts, was examined...
2017: PloS One
https://www.readbyqxmd.com/read/28650660/ph-triggered-recovery-and-reuse-of-thiolated-poly-acryl-acid-functionalized-gold-nanoparticles-with-applications-in-colloidal-catalysis
#8
Siyam M Ansar, Benjamin D Fellows, Patrick Mispireta, O Thompson Mefford, Christopher L Kitchens
Thiolated poly(acrylic acid) (PAA-SH) functionalized gold nanoparticles were explored as a colloidal catalyst with potential application as a recoverable catalyst where the PAA provides pH-responsive dispersibility and phase transfer capability between aqueous and organic media. This system demonstrates complete nanoparticle recovery and redispersion over multiple reaction cycles without changes in nanoparticle morphology or reduction in conversion. The catalytic activity (rate constant) was reduced in subsequent reactions when recovery by aggregation was employed, despite unobservable changes in morphology or dispersability...
June 26, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28650574/injection-of-microporous-annealing-particle-map-hydrogels-in-the-stroke-cavity-reduces-gliosis-and-inflammation-and-promotes-npc-migration-to-the-lesion
#9
Lina R Nih, Elias Sideris, S Thomas Carmichael, Tatiana Segura
With the number of deaths due to stroke decreasing, more individuals are forced to live with crippling disability resulting from the stroke. To date, no therapeutics exist after the first 4.5 h after the stroke onset, aside from rest and physical therapy. Following stroke, a large influx of astrocytes and microglia releasing proinflammatory cytokines leads to dramatic inflammation and glial scar formation, affecting brain tissue's ability to repair itself. Pathological conditions, such as a stroke, trigger neural progenitor cells (NPCs) proliferation and migration toward the damaged site...
June 26, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28650458/duplicated-pollen-pistil-recognition-loci-control-intraspecific-unilateral-incompatibility-in-brassica-rapa
#10
Yoshinobu Takada, Kohji Murase, Hiroko Shimosato-Asano, Takahiro Sato, Honoka Nakanishi, Keita Suwabe, Kentaro K Shimizu, Yong Pyo Lim, Seiji Takayama, Go Suzuki, Masao Watanabe
In plants, cell-cell recognition is a crucial step in the selection of optimal pairs of gametes to achieve successful propagation of progeny. Flowering plants have evolved various genetic mechanisms, mediated by cell-cell recognition, to enable their pistils to reject self-pollen, thus preventing inbreeding and the consequent reduced fitness of progeny (self-incompatibility, SI), and to reject foreign pollen from other species, thus maintaining species identity (interspecific incompatibility)(1). In the genus Brassica, the SI system is regulated by an S-haplotype-specific interaction between a stigma-expressed female receptor (S receptor kinase, SRK) and a tapetum cell-expressed male ligand (S locus protein 11, SP11), encoded by their respective polymorphic genes at the S locus(2-6)...
June 26, 2017: Nature Plants
https://www.readbyqxmd.com/read/28650441/neutrophil-mediated-anticancer-drug-delivery-for-suppression-of-postoperative-malignant-glioma-recurrence
#11
Jingwei Xue, Zekai Zhao, Lei Zhang, Lingjing Xue, Shiyang Shen, Yajing Wen, Zhuoyuan Wei, Lu Wang, Lingyi Kong, Hongbin Sun, Qineng Ping, Ran Mo, Can Zhang
Cell-mediated drug-delivery systems have received considerable attention for their enhanced therapeutic specificity and efficacy in cancer treatment. Neutrophils (NEs), the most abundant type of immune cells, are known to penetrate inflamed brain tumours. Here we show that NEs carrying liposomes that contain paclitaxel (PTX) can penetrate the brain and suppress the recurrence of glioma in mice whose tumour has been resected surgically. Inflammatory factors released after tumour resection guide the movement of the NEs into the inflamed brain...
June 19, 2017: Nature Nanotechnology
https://www.readbyqxmd.com/read/28650429/acetate-mediated-novel-survival-strategy-against-drought-in-plants
#12
Jong-Myong Kim, Taiko Kim To, Akihiro Matsui, Keitaro Tanoi, Natsuko I Kobayashi, Fumio Matsuda, Yoshiki Habu, Daisuke Ogawa, Takuya Sakamoto, Sachihiro Matsunaga, Khurram Bashir, Sultana Rasheed, Marina Ando, Hiroko Takeda, Kanako Kawaura, Miyako Kusano, Atsushi Fukushima, Takaho A Endo, Takashi Kuromori, Junko Ishida, Taeko Morosawa, Maho Tanaka, Chieko Torii, Yumiko Takebayashi, Hitoshi Sakakibara, Yasunari Ogihara, Kazuki Saito, Kazuo Shinozaki, Alessandra Devoto, Motoaki Seki
Water deficit caused by global climate changes seriously endangers the survival of organisms and crop productivity, and increases environmental deterioration(1,2). Plants' resistance to drought involves global reprogramming of transcription, cellular metabolism, hormone signalling and chromatin modification(3-8). However, how these regulatory responses are coordinated via the various pathways, and the underlying mechanisms, are largely unknown. Herein, we report an essential drought-responsive network in which plants trigger a dynamic metabolic flux conversion from glycolysis into acetate synthesis to stimulate the jasmonate (JA) signalling pathway to confer drought tolerance...
June 26, 2017: Nature Plants
https://www.readbyqxmd.com/read/28650341/two-rheumatoid-arthritis-specific-autoantigens-correlate-microbial-immunity-with-autoimmune-responses-in-joints
#13
Annalisa Pianta, Sheila L Arvikar, Klemen Strle, Elise E Drouin, Qi Wang, Catherine E Costello, Allen C Steere
In rheumatoid arthritis (RA), immunological triggers at mucosal sites, such as the gut microbiota, may promote autoimmunity that affects joints. Here, we used discovery-based proteomics to detect HLA-DR-presented peptides in synovia or peripheral blood mononuclear cells and identified 2 autoantigens, N-acetylglucosamine-6-sulfatase (GNS) and filamin A (FLNA), as targets of T and B cell responses in 52% and 56% of RA patients, respectively. Both GNS and FLNA were highly expressed in synovia. GNS appeared to be citrullinated, and GNS antibody values correlated with anti-citrullinated protein antibody (ACPA) levels...
June 26, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28650219/interrogating-cell-division-errors-using-random-and-chromosome-specific-missegregation-approaches
#14
Peter Ly, Don W Cleveland
Accurate segregation of the duplicated genome in mitosis is essential for maintaining genetic stability. Errors in this process can cause numerical and/or structural chromosome abnormalities - hallmark genomic features commonly associated with both tumorigenesis and developmental disorders. A cell-based approach was recently developed permitting inducible missegregation of the human Y chromosome by selectively disrupting kinetochore assembly onto the Y centromere. Although this strategy initially requires several steps of genetic manipulation, it is easy to use, highly efficient and specific for the Y without affecting the autosomes or the X, and does not require cell cycle synchronization or mitotic perturbation...
June 26, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28650209/the-intestinal-barrier-a-fundamental-role-in-health-and-disease
#15
Maaike Vancamelbeke, Séverine Vermeire
The gastrointestinal mucosa constitutes a critical barrier where millions of microbes and environmental antigens come in close contact with the host immune system. Intestinal barrier defects have been associated with a broad range of diseases and therefore denote a new therapeutic target. Areas covered: This review is based on an extensive literature search in PubMed of how the intestinal barrier contributes to health and as a trigger for disease. It discusses the anatomy of the intestinal barrier and explains the available methods to evaluate its function...
June 26, 2017: Expert Review of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28650106/dok3-modulates-bone-remodeling-by-negatively-regulating-osteoclastogenesis-and-positively-regulating-osteoblastogenesis
#16
Xiaofeng Cai, Junjie Xing, Courtney L Long, Qisheng Peng, Mary Beth Humphrey
Osteoclastogenesis is essential for bone remodeling and normal skeletal maintenance. RANKL promotes osteoclast differentiation and function but requires costimulation of immunoreceptor tyrosine-based activation motif (ITAM)-coupled immunoreceptors. Triggering receptor expressed on myeloid cells-2 (TREM2) coupled to ITAM-adaptor protein DNAX activation protein 12kDA (DAP12) provides costimulation of intracellular calcium signaling during osteoclastogenesis. Previously, we found that downstream of kinase-3 (DOK3) physically associates with DAP12 to inhibit toll-like receptor (TLR)-induced inflammatory signaling in macrophages...
June 26, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28650034/the-sandpile-revisited-computer-assisted-determination-of-constitutive-relations-and-the-breaking-of-scaling
#17
H George E Hentschel, Prabhat K Jaiswal, Chandana Mondal, Itamar Procaccia, Jacques Zylberg
We revisit the problem of the stress distribution in a frictional sandpile with both normal and tangential (frictional) inter-granular forces, under gravity, equipped with a new numerical method of generating such assemblies. Numerical simulations allow a determination of the spatial dependence of all the components of the stress field, principle stress axis, angle of repose, as a function of systems size, the coefficient of static friction and the frictional interaction with the bottom surface. We compare these results with the predictions of a theory based on continuum equilibrium mechanics...
June 26, 2017: Soft Matter
https://www.readbyqxmd.com/read/28649987/a-ppar%C3%AE-transcriptional-cascade-directs-adipose-progenitor-cell-niche-interaction-and-niche-expansion
#18
Yuwei Jiang, Daniel C Berry, Ayoung Jo, Wei Tang, Robert W Arpke, Michael Kyba, Jonathan M Graff
Adipose progenitor cells (APCs) reside in a vascular niche, located within the perivascular compartment of adipose tissue blood vessels. Yet, the signals and mechanisms that govern adipose vascular niche formation and APC niche interaction are unknown. Here we show that the assembly and maintenance of the adipose vascular niche is controlled by PPARγ acting within APCs. PPARγ triggers a molecular hierarchy that induces vascular sprouting, APC vessel niche affinity and APC vessel occupancy. Mechanistically, PPARγ transcriptionally activates PDGFRβ and VEGF...
June 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28649828/dimerization-of-the-conserved-n-terminal-domain-of-a-spider-silk-protein-controls-the-self-assembly-of-the-repetitive-core-domain
#19
Joschka Bauer, Thomas Scheibel
Spider silk proteins comprise a repetitive core domain with polyalanine and glycine/proline stretches flanked by highly conserved nonrepetitive N- and C-terminal domains. The termini are responsive to assembly triggers, sensing changes in the ionic (H+, phosphate) and mechanical (shear stress) environment along the spinning duct. Upon assembly, the N-terminal domain dimerizes in a pH-dependent manner induced by protonation of conserved acidic residues. So far, dimerization of N-terminal spider silk domains has been individually investigated in the absence of large core domains...
June 26, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28649688/versatility-and-remarkable-hypergolicity-of-exo-6-exo-9-imidazole-substituted-nido-decaborane
#20
Giovanni P Rachiero, Hatem M Titi, Robin D Rogers
The combination of an energetic imidazole bonded to a hypergolic trigger, such as certain boron hydride clusters, dramatically improves both the energy density and ignition delay of the resulting compounds while also introducing tunability via alkyl group substitution as demonstrated here with (Rim)2B10H12 (R = H, C1, C2, and C4).
June 26, 2017: Chemical Communications: Chem Comm
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