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https://www.readbyqxmd.com/read/29240724/large-outbreak-of-neisseria-meningitidis-serogroup-c-nigeria-december-2016-june-2017
#1
Chimeremma Nnadi, John Oladejo, Sebastian Yennan, Adesola Ogunleye, Chidinma Agbai, Lawal Bakare, Mohammed Abdulaziz, Amina Mohammed, Mary Stephens, Kyadindi Sumaili, Olivier Ronveaux, Helen Maguire, Debra Karch, Mahmood Dalhat, Martin Antonio, Andre Bita, Ifeanyi Okudo, Patrick Nguku, Ryan Novak, Omotayo Bolu, Faisal Shuaib, Chikwe Ihekweazu
On February 16, 2017, the Ministry of Health in Zamfara State, in northwestern Nigeria, notified the Nigeria Centre for Disease Control (NCDC) of an increased number of suspected cerebrospinal meningitis (meningitis) cases reported from four local government areas (LGAs). Meningitis cases were subsequently also reported from Katsina, Kebbi, Niger, and Sokoto states, all of which share borders with Zamfara State, and from Yobe State in northeastern Nigeria. On April 3, 2017, NCDC activated an Emergency Operations Center (EOC) to coordinate rapid development and implementation of a national meningitis emergency outbreak response plan...
December 15, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/29238945/combined-poly-lactide-co-glycolide-microspheres-containing-diphtheria-toxoid-for-a-single-shot-immunization
#2
Hye Seung Woo, Sung Rae Kim, Mikyeong Yoon, Eun Seok Lee, In Ho Chang, Young Mi Whang, Do Ik Lee, Myung Joo Kang, Young Wook Choi
To develop a single-shot vaccine containing diphtheria toxoid (DT) with a sufficient immune response, poly(lactide-co-glycolide) (PLGA) microspheres were prepared by water-in-oil-in-water double emulsification and solvent extraction techniques using low or high-molecular-weight PLGA (LMW-MS or HMW-MS). Stearic acid (SA) was introduced to HMW-MS (HMW/SA-MS) as a release modulator. Mean particle sizes (dvs, μm) varied between the prepared microspheres, with LMW-MS, HMW-MS, and HMW/SA-MS having the sizes of 29...
December 13, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/29237052/multimode-drug-inducible-crispr-cas9-devices-for-transcriptional-activation-and-genome-editing
#3
Jia Lu, Chen Zhao, Yingze Zhao, Jingfang Zhang, Yue Zhang, Li Chen, Qiyuan Han, Yue Ying, Shuai Peng, Runna Ai, Yu Wang
Precise investigation and manipulation of dynamic biological processes often requires molecular modulation in a controlled inducible manner. The clustered, regularly interspaced, short palindromic repeats (CRISPR)/CRISPR associated protein 9 (Cas9) has emerged as a versatile tool for targeted gene editing and transcriptional programming. Here, we designed and vigorously optimized a series of Hybrid drug Inducible CRISPR/Cas9 Technologies (HIT) for transcriptional activation by grafting a mutated human estrogen receptor (ERT2) to multiple CRISPR/Cas9 systems, which renders them 4-hydroxytamoxifen (4-OHT) inducible for the access of genome...
December 9, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29235502/stress-induced-release-of-the-s100a8-a9-alarmin-is-elevated-in-coronary-artery-disease-patients-with-impaired-cortisol-response
#4
L Jonasson, H Grauen Larsen, A K Lundberg, B Gullstrand, A A Bengtsson, A Schiopu
Psychological stress is thought to be an important trigger of cardiovascular events, yet the involved pathways and mediators are largely unknown. Elevated systemic levels of the pro-inflammatory alarmin S100A8/A9 correlate with poor prognosis in coronary artery disease (CAD) patients. Here, we investigated the links between S100A8/A9 release and parameters of anti-inflammatory glucocorticoid secretion in two different cohorts subjected to a psychological stress test. In the first cohort of 60 CAD patients, psychological stress induced a rapid increase of circulating S100A8/A9...
December 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29234728/nanocomposite-capsules-with-directional-pulsed-nanoparticle-release
#5
Christiana E Udoh, João T Cabral, Valeria Garbin
The precise spatiotemporal delivery of nanoparticles from polymeric capsules is required for applications ranging from medicine to materials science. These capsules derive key performance aspects from their overall shape and dimensions, porosity, and internal microstructure. To this effect, microfluidics provide an exceptional platform for emulsification and subsequent capsule formation. However, facile and robust approaches for nanocomposite capsule fabrication, exhibiting triggered nanoparticle release, remain elusive because of the complex coupling of polymer-nanoparticle phase behavior, diffusion, phase inversion, and directional solidification...
December 2017: Science Advances
https://www.readbyqxmd.com/read/29233825/rapid-responses-to-avapritinib-blu-285-in-mastocytosis
#6
(no author information available yet)
In a phase I trial of avapritinib (formerly BLU-285), which targets D816V mutant KIT, for the treatment of advanced systemic mastocytosis, patients experienced rapid and durable disease control. The overall response rate was 72%, and 56% of patients experienced a complete or partial response. No patients discontinued treatment due to adverse events, most of which were mild to moderate in nature.
December 12, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/29232400/biological-characterization-of-a-novel-in-vitro-cell-irradiator
#7
Tyler L Fowler, Michael M Fisher, Alison M Bailey, Bryan P Bednarz, Randall J Kimple
To evaluate the overall robustness of a novel cellular irradiator we performed a series of well-characterized, dose-responsive assays to assess the consequences of DNA damage. We used a previously described novel irradiation system and a traditional 137Cs source to irradiate a cell line. The generation of reactive oxygen species was assessed using chloromethyl-H2DCFDA dye, the induction of DNA DSBs was observed using the comet assay, and the initiation of DNA break repair was assessed through γH2AX image cytometry...
2017: PloS One
https://www.readbyqxmd.com/read/29232178/rapid-decrease-in-krt14-and-tp53-mrna-expression-in-the-buccal-mucosa-of-patients-receiving-total-body-irradiation-for-allogeneic-stem-cell-transplantation
#8
J Chmara, J W L Browning, H Atkins, M Sabloff, B C McKay
The only curative treatment option for relapsed patients with acute myeloid leukemia (AML) is allogeneic stem cell transplantation. Depletion of hematopoietic stem cells and leukemic blast cells is achieved through the systemic administration of DNA damaging agents, including total-body irradiation (TBI) prior to transplantation. Since other tissues are radiosensitive, the identification of biomarkers could facilitate the management of additional toxicities. Buccal keratinocytes are readily accessible and could provide a source of cells for RNA analysis...
December 12, 2017: Radiation Research
https://www.readbyqxmd.com/read/29231783/dexamethasone-exacerbates-cytotoxic-chemotherapy-induced-lethargy-and-weight-loss-in-female-tumor-free-mice
#9
John Wong, Lisa T Tran, Kaari A Lynch, Lisa J Wood
Cytotoxic chemotherapy can induce a systemic inflammatory response which has been proposed to be an underlying mechanism of cancer treatment related fatigue. Dexamethasone, a synthetic glucocorticoid that has potent anti-inflammatory effects, is incorporated into chemotherapy regimens to prevent chemotherapy-induced nausea and vomiting (CINV). The purpose of this study was to determine whether by suppressing cytotoxic chemotherapy-induced inflammation, dexamethasone could ameliorate chemotherapy induced fatigue/lethargy in tumor free mice...
December 12, 2017: Cancer Biology & Therapy
https://www.readbyqxmd.com/read/29231781/dynamic-autoregulation-of-cerebral-blood-flow-measured-non-invasively-with-fast-diffuse-correlation-spectroscopy
#10
Ashwin B Parthasarathy, Kimberly P Gannon, Wesley B Baker, Christopher G Favilla, Ramani Balu, Scott E Kasner, Arjun G Yodh, John A Detre, Michael T Mullen
Cerebral autoregulation (CA) maintains cerebral blood flow (CBF) in the presence of systemic blood pressure changes. Brain injury can cause loss of CA and resulting dysregulation of CBF, and the degree of CA impairment is a functional indicator of cerebral tissue health. Here, we demonstrate a new approach to noninvasively estimate cerebral autoregulation in healthy adult volunteers. The approach employs pulsatile CBF measurements obtained using high-speed diffuse correlation spectroscopy (DCS). Rapid thigh-cuff deflation initiates a chain of responses that permits estimation of rates of dynamic autoregulation in the cerebral microvasculature...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29230411/rapid-analyses-of-polyetheretherketone-wear-characteristics-by-accelerated-wear-testing-with-microfabricated-surfaces-for-artificial-joint-systems
#11
Chen-Ying Su, Chien-Wei Kuo, Hsu-Wei Fang
Wear particle-induced biological responses are the major factors resulting in the loosening and then failure of total joint arthroplasties. It is feasible to improve the lubrication and reduce the wear of artificial joint system. Polyetheretherketone (PEEK) is considered as a potential bearing material due to its mechanical characteristics of resistance to fatigue strain. The PEEK wear particles have been indicated to be involved in biological responses in vitro, and further studies regarding the wear phenomena and wear particle generation are needed...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29230215/potential-effects-of-horizontal-gene-exchange-in-the-human-gut
#12
Aaron Lerner, Torsten Matthias, Rustam Aminov
Many essential functions of the human body are dependent on the symbiotic microbiota, which is present at especially high numbers and diversity in the gut. This intricate host-microbe relationship is a result of the long-term coevolution between the two. While the inheritance of mutational changes in the host evolution is almost exclusively vertical, the main mechanism of bacterial evolution is horizontal gene exchange. The gut conditions, with stable temperature, continuous food supply, constant physicochemical conditions, extremely high concentration of microbial cells and phages, and plenty of opportunities for conjugation on the surfaces of food particles and host tissues, represent one of the most favorable ecological niches for horizontal gene exchange...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29230171/spatial-temporal-feature-analysis-on-single-trial-event-related-potential-for-rapid-face-identification
#13
Lei Jiang, Yun Wang, Bangyu Cai, Yueming Wang, Yiwen Wang
The event-related potential (ERP) is the brain response measured in electroencephalography (EEG), which reflects the process of human cognitive activity. ERP has been introduced into brain computer interfaces (BCIs) to communicate the computer with the subject's intention. Due to the low signal-to-noise ratio of EEG, most ERP studies are based on grand-averaging over many trials. Recently single-trial ERP detection attracts more attention, which enables real time processing tasks as rapid face identification...
2017: Frontiers in Computational Neuroscience
https://www.readbyqxmd.com/read/29229834/rapid-direct-activity-assays-for-smoothened-reveal-hedgehog-pathway-regulation-by-membrane-cholesterol-and-extracellular-sodium
#14
Benjamin R Myers, Lila Neahring, Yunxiao Zhang, Kelsey J Roberts, Philip A Beachy
Hedgehog signaling specifies tissue patterning and renewal, and pathway components are commonly mutated in certain malignancies. Although central to ensuring appropriate pathway activity in all Hedgehog-responsive cells, how the transporter-like receptor Patched1 regulates the seven-transmembrane protein Smoothened remains mysterious, partially due to limitations in existing tools and experimental systems. Here we employ direct, real-time, biochemical and physiology-based approaches to monitor Smoothened activity in cellular and in vitro contexts...
December 11, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29227658/ion-speciation-and-transport-properties-of-litfsi-in-1-3-dioxolane-solutions-a-case-study-for-li-s-battery-applications
#15
Rinaldo Raccichini, James W Dibden, Ashley Brew, John R Owen, Nuria Garcia-Araez
The Lithium-Sulfur battery is considered to be one of the main candidates for the "post-lithium-ion" battery generation, because of its high theoretical specific capacity and inherently low cost. The role of the electrolyte is particularly important in this system and remarkable battery performances have been reported by tuning the amount of salt in the electrolyte. To further understand the reasons for such improvements we chose the lithium bis(trifluoromethanesulfonyl)imide in 1,3-dioxolane electrolyte as a model salt-solvent system for a systematic study of conductivity and viscosity over a wide range of concentration from 10-5 up to 5 molal...
December 11, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29227333/illustrative-cases-for-monitoring-by-quantitative-analysis-of-braf-nras-ctdna-mutations-in-liquid-biopsies-of-metastatic-melanoma-patients-who-gained-clinical-benefits-from-anti-pd1-antibody-therapy
#16
Teofila Seremet, Simon Planken, Max Schreuer, Yanina Jansen, Mélanie Delaunoy, Hakim El Housni, Danielle Lienard, Véronique Del Marmol, Pierre Heimann, Bart Neyns
Anti-programmed death 1 (PD-1) monoclonal antibodies improve the survival of metastatic melanoma patients. Predictive or monitoring biomarkers for response to this therapy could improve the clinical management of these patients. To date, no established biomarkers are available for monitoring the response to immunotherapy. Tumor- specific mutations in circulating tumor DNA (ctDNA) such as BRAF and NRAS mutations for melanoma patients have been proposed for monitoring of immunotherapy response. We present seven illustrative cases for the use of ctDNA BRAF and NRAS mutations' monitoring in plasma...
December 8, 2017: Melanoma Research
https://www.readbyqxmd.com/read/29225605/the-state-of-cellular-adoptive-immunotherapy-for-neuroblastoma-and-other-pediatric-solid-tumors
#17
Thanh-Phuong Le, To-Ha Thai
Research on adult cancer immunotherapy is proceeding at a rapid pace resulting in an impressive success rate exemplified by a few high profile cases. However, this momentum is not readily extended to pediatric immunotherapy, and it is not for lack of trying. Though reasons for the slower advance are not apparent, some issues can be raised. Pediatric cancer patients represent a distinct demographic group whose immune system is inherently different from that of mature adults. Treating pediatric patients with immunotherapy designed for adults may not yield objective clinical responses...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29225397/concurrent-oct-imaging-of-stimulus-evoked-retinal-neural-activation-and-hemodynamic-responses
#18
Taeyoon Son, Benquan Wang, Yiming Lu, Yanjun Chen, Dingcai Cao, Xincheng Yao
It is well established that major retinal diseases involve distortions of the retinal neural physiology and blood vascular structures. However, the details of distortions in retinal neurovascular coupling associated with major eye diseases are not well understood. In this study, a multi-modal optical coherence tomography (OCT) imaging system was developed to enable concurrent imaging of retinal neural activity and vascular hemodynamics. Flicker light stimulation was applied to mouse retinas to evoke retinal neural responses and hemodynamic changes...
2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/29225370/macrophyte-community-response-to-nitrogen-loading-and-thermal-stressors-in-rapidly-flushed-mesocosm-systems
#19
James E Kaldy, Cheryl A Brown, Walter G Nelson, Melanie Frazier
A mesocosm system was developed to simulate estuarine conditions characteristic of short water-residence time ecosystems of the Pacific Coast of North America, and used to evaluate the response of multiple macrophyte metrics to gradients of NO3 loading and temperature. Replicated experiments found that few responses could be directly attributed to NO3 loading up to 6 x ambient. Some response metrics exhibited weak relationships with nutrient loading but could not be resolved with available statistical power...
December 1, 2017: Journal of Experimental Marine Biology and Ecology
https://www.readbyqxmd.com/read/29225041/syringaresinol-suppresses-excitatory-synaptic-transmission-and-picrotoxin-induced-epileptic-activity-in-the-hippocampus-through-presynaptic-mechanisms
#20
Young Seon Cho, Woo Seok Song, Sang Ho Yoon, Kyeong-Yeol Park, Myoung-Hwan Kim
Many neuromodulating drugs acting on the nervous system originate from botanical sources. These plant-derived substances modulate the activity of receptors, ion channels, or transporters in neurons. Their properties make the substances useful for medicine and research. Here, we show that the plant lignan (+)-syringaresinol (SYR) suppresses excitatory synaptic transmission via presynaptic modulation. Bath application of SYR rapidly reduced the slopes of the field excitatory postsynaptic potentials (fEPSPs) at the hippocampal Schaffer collateral (SC)-CA1 synapse in a dose-dependent manner...
December 7, 2017: Neuropharmacology
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