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Rapid Response Systems

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https://www.readbyqxmd.com/read/28817806/specialized-mechanosensory-nociceptors-mediating-rapid-responses-to-hair-pull
#1
Nima Ghitani, Arnab Barik, Marcin Szczot, James H Thompson, Chia Li, Claire E Le Pichon, Michael J Krashes, Alexander T Chesler
The somatosensory system provides animals with the ability to detect, distinguish, and respond to diverse thermal, mechanical, and irritating stimuli. While there has been progress in defining classes of neurons underlying temperature sensation and gentle touch, less is known about the neurons specific for mechanical pain. Here, we use in vivo functional imaging to identify a class of cutaneous sensory neurons that are selectively activated by high-threshold mechanical stimulation (HTMRs). We show that their optogenetic excitation evokes rapid protective and avoidance behaviors...
August 16, 2017: Neuron
https://www.readbyqxmd.com/read/28817705/cell-surface-dynamics-and-cellular-distribution-of-endogenous-fcrn
#2
Lena D'Hooghe, Andrew D Chalmers, Sam Heywood, Paul Whitley
A major role for FcRn is the salvage of pinocytosed IgG and albumin from a degradative fate in lysosomes. FcRn achieves this by binding IgG in a pH-dependent manner in acidic endosomes and recycling it to the plasma membrane to be released at neutral pH. This is important in maintaining high serum IgG and albumin levels and has the potential to be exploited to modulate the pharmacokinetics of antibody-based therapeutics. Although FcRn is responsible for the recycling of IgG, the dynamic behaviour of endogenous FcRn is not well understood...
2017: PloS One
https://www.readbyqxmd.com/read/28816340/coagulation-factor-xii-regulates-inflammatory-responses-in-human-lungs
#3
Rosanna Hess, Lukasz Wujak, Christina Hesse, Katherina Sewald, Danny Jonigk, Gregor Warnecke, Hans-Gerd Fieguth, Steven de Maat, Coen Maas, Francesco Bonella, Klaus T Preissner, Benjamin Weiss, Liliana Schaefer, Wolfgang M Kuebler, Philipp Markart, Malgorzata Wygrecka
Increased procoagulant activity in the alveolar compartment and uncontrolled inflammation are hallmarks of the acute respiratory distress syndrome (ARDS). Here, we investigated whether the contact phase system of coagulation is activated and may regulate inflammatory responses in human lungs. Components of the contact phase system were characterized in bronchoalveolar lavage fluids (BALF) from 54 ARDS patients and 43 controls, and their impact on cytokine/chemokine expression in human precision cut lung slices (PCLS) was assessed by a PCR array...
August 17, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28814832/combinatorial-and-sequential-delivery-of-gemcitabine-and-oseltamivir-phosphate-from-implantable-poly-d-l-lactic-co-glycolic-acid-cylinders-disables-human-pancreatic-cancer-cell-survival
#4
Stephanie Allison Logan, Amanda J Brissenden, Myron R Szewczuk, Ronald J Neufeld
Combination therapies against multiple targets are currently being developed to prevent resistance to a single chemotherapeutic agent and to extirpate pre-existing resistance in heterogeneous cancer cells in tumors due to selective pressure from the single agent. Gemcitabine (GEM), a chemotherapeutic agent, is the current standard of care for patients with pancreatic cancer. Patients with pancreatic cancer receiving GEM have a low progression-free survival. Given the poor response rate to GEM, cancer cells are known to develop rapid resistance to this drug...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28814659/fluorescence-detection-of-glutathione-gsh-and-oxidized-glutathione-gssg-in-blood-with-a-nir-excitable-cyanine-probe
#5
Changhui Liu, Fengpei Qi, Fubin Wen, Liping Long, Ronghua Yang
Cyanine has been widely utilized as a near infrared (NIR) fluorophore for detection of glutathione (GSH). However, the excitation of most of the reported cyanine-based probes was less than 800 nm, which inevitably induce biological background absorption and lower the sensitivity, limiting their use for detection of GSH in blood samples. To address this issue, here, a heptamethine cyanine probe (DNIR), with a NIR excitation wavelength at 804 nm and a NIR emission wavelength at 832 nm, is employed for the detection of GSH and its oxidized form (GSSG) in blood...
August 17, 2017: Methods and Applications in Fluorescence
https://www.readbyqxmd.com/read/28813419/vaccine-driven-pharmacodynamic-dissection-and-mitigation-of-fenethylline-psychoactivity
#6
Cody J Wenthur, Bin Zhou, Kim D Janda
Fenethylline, also known by the trade name Captagon, is a synthetic psychoactive stimulant that has recently been linked to a substance-use disorder and 'pharmacoterrorism' in the Middle East. Although fenethylline shares a common phenethylamine core with other amphetamine-type stimulants, it also incorporates a covalently linked xanthine moiety into its parent structure. These independently active pharmacophores are liberated during metabolism, resulting in the release of a structurally diverse chemical mixture into the central nervous system...
August 16, 2017: Nature
https://www.readbyqxmd.com/read/28813307/the-innate-alarm-system-in-ptsd-conscious-and-subconscious-processing-of-threat
#7
REVIEW
Ruth A Lanius, Daniela Rabellino, Jenna E Boyd, Sherain Harricharan, Paul A Frewen, Margaret C McKinnon
The innate alarm system (IAS), comprised of functionally connected brain regions including the brainstem, amygdala, pulvinar, and frontotemporal cortex, is a fast subcortical brain network facilitating rapid responses to threat. Post-traumatic stress disorder (PTSD) features subconscious and conscious threat detection, together contributing to hyperarousal symptoms. Emerging literature identifies aberrant threat-related neurocircuitry involved in subconscious and conscious threat processing in PTSD. We review this literature, focusing on subconscious threat processing and its relation to the IAS...
April 2017: Current Opinion in Psychology
https://www.readbyqxmd.com/read/28812844/clinician-perspectives-of-barriers-to-effective-implementation-of-a-rapid-response-system-in-an-academic-health-centre-a-focus-group-study
#8
John Rihari-Thomas, Michelle DiGiacomo, Jane Phillips, Phillip Newton, Patricia M Davidson
BACKGROUND: Systemic and structural issues of rapid response system (RRS) models can hinder implementation. This study sought to understand the ways in which acute care clinicians (physicians and nurses) experience and negotiate care for deteriorating patients within the RRS. METHODS: Physicians and nurses working within an Australian academic health centre within a jurisdictional-based model of clinical governance participated in focus group interviews. Verbatim transcripts were analysed using thematic content analysis...
January 1, 2017: International Journal of Health Policy and Management
https://www.readbyqxmd.com/read/28812677/species-specific-responses-to-ocean-acidification-should-account-for-local-adaptation-and-adaptive-plasticity
#9
Cristian A Vargas, Nelson A Lagos, Marco A Lardies, Cristian Duarte, Patricio H Manríquez, Victor M Aguilera, Bernardo Broitman, Steve Widdicombe, Sam Dupont
Global stressors, such as ocean acidification, constitute a rapidly emerging and significant problem for marine organisms, ecosystem functioning and services. The coastal ecosystems of the Humboldt Current System (HCS) off Chile harbour a broad physical-chemical latitudinal and temporal gradient with considerable patchiness in local oceanographic conditions. This heterogeneity may, in turn, modulate the specific tolerances of organisms to climate stress in species with populations distributed along this environmental gradient...
March 13, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812264/oxytocin-and-steroid-actions
#10
Gustav F Jirikowski, Scott D Ochs, Jack D Caldwell
Biosynthesis and secretion of the hypothalamic nonapeptide oxytocin largely depends on steroid hormones. Estradiol, corticosterone, and vitamin D seem to be the most prominent actors. Due to their lipophilic nature, systemic steroids are thought to be capable of crossing the blood-brain barrier, thus mediating central functions including neuroendocrine and behavioral control. The actual mode of action of steroids in hypothalamic circuitry is still unknown: Most of the oxytocinergic perikarya lack nuclear steroid receptors but express proteins suspected to be membrane receptors for steroids...
August 16, 2017: Current Topics in Behavioral Neurosciences
https://www.readbyqxmd.com/read/28812000/diagnostic-imaging-features-of-necrotizing-enterocolitis-a-narrative-review
#11
REVIEW
Francesco Esposito, Rosanna Mamone, Marco Di Serafino, Carmela Mercogliano, Valerio Vitale, Gianfranco Vallone, Patrizia Oresta
Necrotizing enterocolitis (NEC) is an inflammatory process, characterized by intestinal necrosis of variable extension, leading to perforation, generalized peritonitis and death. The classical pathogenetic theory focuses on mucosal damage related to a stress induced intestinal ischemia leading to mucosal injury and bacterial colonization of the wall. A more recent hypothesis emphasizes the role of immaturity of gastrointestinal and immune system, particularly of the premature, responsible of bowel wall vulnerability and suffering...
June 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28811533/plasma-metabolomics-profiling-of-maintenance-hemodialysis-based-on-capillary-electrophoresis-time-of-flight-mass-spectrometry
#12
Shuxin Liu, Lichao Wang, Chunxiu Hu, Xin Huang, Hong Liu, Qiuhui Xuan, Xiaohui Lin, Xiaojun Peng, Xin Lu, Ming Chang, Guowang Xu
Uremia has been a rapidly increasing health problem in China. Hemodialysis (HD) is the main renal replacement therapy for uremia. The results of large-scale clinical trials have shown that the HD pattern is crucial for long-term prognosis of maintenance hemodialysis (MHD) in uremic patients. Plasma metabolism is very important for revealing the biological insights linked to the therapeutic effects of the HD pattern on uremia. Alteration of plasma metabolites in uremic patients in response to HD therapy has been reported...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811347/tifa-signaling-in-gastric-epithelial-cells-initiates-the-cag-type-4-secretion-system-dependent-innate-immune-response-to-helicobacter-pylori-infection
#13
Alevtina Gall, Ryan G Gaudet, Scott D Gray-Owen, Nina R Salama
Helicobacter pylori is a bacterial pathogen that colonizes the human stomach, causing inflammation which, in some cases, leads to gastric ulcers and cancer. The clinical outcome of infection depends on a complex interplay of bacterial, host genetic, and environmental factors. Although H. pylori is recognized by both the innate and adaptive immune systems, this rarely results in bacterial clearance. Gastric epithelial cells are the first line of defense against H. pylori and alert the immune system to bacterial presence...
August 15, 2017: MBio
https://www.readbyqxmd.com/read/28811170/zika-virus-research-models
#14
REVIEW
Jessica L Kublin, James B Whitney
The 2015 Brazilian Zika virus outbreak sparked a rapid response to control the spread of the virus. What was first understood to be a mild self-resolving infection is now linked to significant neurological defects in both neonates, and adults. The WHO declared the 2016 Zika epidemic a public health emergency and issued an unprecedented recommendation to women in affected regions to delay pregnancy until the risks surrounding Zika virus could be understood, or the epidemic contained. Since that time, considerable effort has been dedicated to understanding Zika transmission and pathogenesis to aid the development of drugs and vaccines...
August 12, 2017: Virus Research
https://www.readbyqxmd.com/read/28810081/a-risk-analysis-approach-to-prioritizing-epidemics-ebola-virus-disease-in-west-africa-as-a-case-study
#15
Whenayon Simeon Ajisegiri, Abrar Ahmad Chughtai, C Raina MacIntyre
The 2014 Ebola virus disease (EVD) outbreak affected several countries worldwide, including six West African countries. It was the largest Ebola epidemic in the history and the first to affect multiple countries simultaneously. Significant national and international delay in response to the epidemic resulted in 28,652 cases and 11,325 deaths. The aim of this study was to develop a risk analysis framework to prioritize rapid response for situations of high risk. Based on findings from the literature, sociodemographic features of the affected countries, and documented epidemic data, a risk scoring framework using 18 criteria was developed...
August 15, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28808972/chromosome-conformation-capture-for-research-on-innate-antiviral-immunity
#16
Yoon Jung Kim, Tae Hoon Kim
Chromosome conformation capture (3C) technology has revolutionized our knowledge on chromatin folding and nuclear organization. This cis-loop detection approach can be used to identify candidate regulatory elements interacting with target gene of interest. This chapter introduces the application of 3C technique to investigate a dynamic alteration in the chromosome folding structure or genomic architecture resulting from interaction changes between the enhancer and its target gene. Innate antiviral immunity is one of the well-known gene induction systems, involving rapid first-line response to virus or pathogen to trigger gene expression changes in order to protect cells and to limit further infection...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28808866/activations-in-gray-and-white-matter-are-modulated-by-uni-manual-responses-during-within-and-inter-hemispheric-transfer-effects-of-response-hand-and-right-handedness
#17
Vaibhav A Diwadkar, Marcella Bellani, Asadur Chowdury, Silvia Savazzi, Cinzia Perlini, Veronica Marinelli, Giada Zoccatelli, Franco Alessandrini, Elisa Ciceri, Gianluca Rambaldelli, Mirella Ruggieri, A Carlo Altamura, Carlo A Marzi, Paolo Bambilla
Because the visual cortices are contra-laterally organized, inter-hemispheric transfer tasks have been used to behaviorally probe how information briefly presented to one hemisphere of the visual cortex is integrated with responses resulting from the ipsi- or contra-lateral motor cortex. By forcing rapid information exchange across diverse regions, these tasks robustly activate not only gray matter regions, but also white matter tracts. It is likely that the response hand itself (dominant or non-dominant) modulates gray and white matter activations during within and inter-hemispheric transfer...
August 14, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28807759/development-of-a-highly-resolved-loop-mediated-isothermal-amplification-method-to-detect-the-n526k-ftsi-mutation-of-%C3%AE-lactamase-negative-ampicillin-resistant-haemophilus-influenzae
#18
Shinsuke Tamura, Takuya Maeda, Kazuhisa Misawa, Morichika Osa, Takaaki Hamamoto, Atsushi Yuki, Kazuo Imai, Kei Mikita, Kyoko Morichika, Akihiko Kawana, Hiroshi Matsumoto, Shigeaki Nonoyama
Rapid and easy detection of sequence polymorphisms, including nucleotide point mutations of bacterial pathogens responsible for amino acid substitutions linked to drug resistance, is essential for the proper use of antimicrobial agents. Here, a detection method using loop-mediated amplification (LAMP) combined with amplification refractory mutation system (ARMS) to accurately distinguish a different single nucleotide in the target sequence was established, named ARMS-SNP LAMP. This procedure is capable of species-specific detection of a nucleotide (1578T) in the ftsI gene on Haemophilus influenzae without amplifying the sequence carrying the point mutations (T1578G/A) in β-lactamase-negative ampicillin resistant (BLNAR) strains...
August 11, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28807542/rapid-and-simple-analysis-of-disease-associated-biomarkers-of-taiwanese-patients-with-schizophrenia-using-matrix-assisted-laser-desorption-ionization-mass-spectrometry
#19
Tiao-Lai Huang, Li-Hua Lo, Jentaie Shiea, Hung Su
BACKGROUND: Matrix-assisted laser desorption ionization/time-of-flight mass spectrometry (MALDI-TOF MS) is an extremely sensitive analytical tool for characterizing biological compounds in bio samples. In this study, we applied MALDI-TOF MS to assess potential protein biomarkers in the peripheral blood mononuclear cells (PBMCs) of patients with schizophrenia in the acute phase, recovery phase and healthy controls in Taiwan. METHODS: We recruited 40 participants, including 20 pairs of patients diagnosed with schizophrenia in the acute phase, after four-week treatment with drug in the recovery phase, and 20 healthy controls...
August 11, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28807522/orthostatic-hypotension-a-practical-approach-to-investigation-and-management
#20
Amy C Arnold, Satish R Raj
The maintenance of blood pressure upon the assumption of upright posture depends on rapid cardiovascular adaptations driven primarily by the autonomic nervous system. Failure of these compensatory mechanisms can result in orthostatic hypotension (OH), defined as sustained reduction in systolic blood pressure > 20 mm Hg or diastolic blood pressure > 10 mm Hg within 3 minutes of standing or > 60° head-up tilt. OH is a common finding, particularly in elderly populations, associated with cardiovascular and cerebrovascular morbidity and mortality...
May 17, 2017: Canadian Journal of Cardiology
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