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Rapid Response Systems

Hui Li, Xiang Zhou, Dongbao Yao, Haojun Liang
Herein, a class of pH-responsive spherical nucleic acid (SNA) nanostructures prepared by functionalizing gold nanoparticles with DNA nanodevices is presented, which can perform duplex-to-triplex transition upon pH change via pH-sensitive parallel Hoogsteen interactions. The SNA nanostructures exhibit tunable pH sensitivity and a highly rapid and reversible allosteric effect. Furthermore, they can exactly image lysosomes in living cells. We next engineered pH-triggered doxorubicin(Dox)-SNA conjugates that could deliver Dox molecules into cancer cells and achieve pH-dependent drug release...
March 22, 2018: Chemical Communications: Chem Comm
Terdsak Yano, Somphorn Phornwisetsirikun, Patipat Susumpow, Surasing Visrutaratna, Karoon Chanachai, Polawat Phetra, Warangkhana Chaisowwong, Pairat Trakarnsirinont, Phonpat Hemwan, Boontuan Kaewpinta, Charuk Singhapreecha, Khwanchai Kreausukon, Arisara Charoenpanyanet, Chongchit Sripun Robert, Lamar Robert, Pranee Rodtian, Suteerat Mahasing, Ekkachai Laiya, Sakulrat Pattamakaew, Taweesart Tankitiyanon, Chalutwan Sansamur, Lertrak Srikitjakarn
BACKGROUND: Aiming for early disease detection and prompt outbreak control, digital technology with a participatory One Health approach was used to create a novel disease surveillance system called Participatory One Health Disease Detection (PODD). PODD is a community-owned surveillance system that collects data from volunteer reporters; identifies disease outbreak automatically; and notifies the local governments (LGs), surrounding villages, and relevant authorities. This system provides a direct and immediate benefit to the communities by empowering them to protect themselves...
March 21, 2018: JMIR Public Health and Surveillance
William O Asiche, Oscar W Mitalo, Yuka Kasahara, Yasuaki Tosa, Eric G Mworia, Willis O Owino, Koichiro Ushijima, Ryohei Nakano, Kentaro Yano, Yasutaka Kubo
BACKGROUND: Kiwifruit are classified as climacteric since exogenous ethylene (or its analogue propylene) induces rapid ripening accompanied by ethylene production under positive feedback regulation. However, most of the ripening-associated changes (Phase 1 ripening) in kiwifruit during storage and on-vine occur largely in the absence of any detectable ethylene. This ripening behavior is often attributed to basal levels of system I ethylene, although it is suggested to be modulated by low temperature...
March 21, 2018: BMC Plant Biology
Julian Clauß, Matthias Obenaus, Csaba Miskey, Zoltán Ivics, Zsuzsanna Izsvák, Wolfgang Uckert, Mario Bunse
Transposon-based vectors have entered clinical trials as an alternative to viral vectors for genetic engineering of T cells. However, transposon vectors require DNA transfection into T cells which we found to cause adverse effects. T cell viability was decreased in a dose-dependent manner and DNA-transfected T cells showed a delayed response upon T cell receptor (TCR) stimulation with regard to blast formation, proliferation and surface expression of CD25 and CD28. Gene expression analysis demonstrated a DNA-dependent induction of a type I interferon response and IFN-β upregulation...
March 21, 2018: Human Gene Therapy
Zhenhua Miao, Linda S Ertl, Dale Newland, Bin Zhao, Yu Wang, Xiaoping Zang, James J Campbell, Xiaoli Liu, Ton Dang, Shichang Miao, Antoni Krasinski, Sreenivas Punna, Yibin Zeng, Jeffrey McMahon, Penglie Zhang, Israel F Charo, Thomas J Schall, Rajinder Singh
Focal segmental glomerulosclerosis (FSGS) comprises a group of uncommon disorders that present with marked proteinuria, nephrotic syndrome, progressive renal failure and characteristic glomerular lesions on histopathology. The current standard of care for patients with FSGS include immunosuppressive drugs such as glucocorticoids followed by calcineurin inhibitors, if needed for intolerance or inadequate response to glucocorticoids. Renin-angiotensin-aldosterone (RAAS) blockers are also used to control proteinuria, an important signature of FSGS...
2018: PloS One
Tracey Ann Cuin, Ingo Dreyer, Erwan Michard
Fast responses to an external threat depend on the rapid transmission of signals through a plant. Action potentials (APs) are proposed as such signals. Plant APs share similarities with their animal counterparts; they are proposed to depend on the activity of voltage-gated ion channels. Nonetheless, despite their demonstrated role in (a)biotic stress responses, the identities of the associated voltage-gated channels and transporters remain undefined in higher plants. By demonstrating the role of two potassium-selective channels in Arabidopsis thaliana in AP generation and shaping, we show that the plant AP does depend on similar Kv -like transport systems to those of the animal signal...
March 21, 2018: International Journal of Molecular Sciences
Hunter G Moss, Truman R Brown, Donald B Wiest, Dorothea D Jenkins
Persistent oxidative stress depletes reduced glutathione (GSH), an intracellular antioxidant and an important determinant of CNS injury after hypoxia ischemia. We used standard, short echo time Stimulated Echo Acquisition Mode (STEAM) to detect GSH by magnetic resonance spectroscopy (MRS) in 24 term neonates with hypoxic-ischemic encephalopathy (HIE), on day of life 5-6, after rewarming from therapeutic hypothermia. MRS demonstrated reliable, consistent GSH of 1·64 ± 0·20 mM in the basal ganglia immediately before intravenous infusion of N-acetylcysteine...
January 1, 2018: Journal of Cerebral Blood Flow and Metabolism
Mohamed Rahmani, Jewel Nkwocha, Elisa Hawkins, Xinyan Pei, Rebecca E Parker, Maciej Kmieciak, Joel D Leverson, Deepak Sampath, Andrea Ferreira-Gonzalez, Steven Grant
Inhibitors targeting BCL-2 apoptotic proteins have significant potential for the treatment of acute myeloid leukemia (AML); however, complete responses are observed in only 20% of patients suggesting targeting BCL-2 alone is insufficient to yield durable responses. Here we assessed the efficacy of co-administration of the PI3K/mTOR inhibitor GDC-0980 or the p110β-sparing PI3K inhibitor taselisib with the selective BCL-2 antagonist venetoclax in AML cells. Tetracycline-inducible downregulation of BCL-2 significantly sensitized MV4-11 and MOLM-13 AML cells to PI3K inhibition...
March 20, 2018: Cancer Research
Xiu-Xiu Zhang, Yi-Zhen Song, Fang Fang, Zhi-Yong Wu
On-site rapid monitoring of nitrite as an assessment indicator of the environment, food, and physiological systems has drawn extensive attention. Here, electrokinetic stacking (ES) was combined with colorimetric reaction on a paper-based device (PAD) to achieve colorless nitrite detection with smartphone. In this paper, nitrite was stacked on the paper fluidic channel as a narrow band by electrokinetic stacking. Then, Griess reagent was introduced to visualize the stacking band. Under optimal conditions, the sensitivity of nitrite was 160-fold increased within 5 min...
March 19, 2018: Analytical and Bioanalytical Chemistry
Rachel V Jimenez, Tyler T Wright, Nicholas R Jones, Jianming Wu, Andrew W Gibson, Alexander J Szalai
C-reactive protein (CRP) is the prototypical acute phase reactant, increasing in blood concentration rapidly and several-fold in response to inflammation. Recent evidence indicates that CRP has an important physiological role even at low, baseline levels, or in the absence of overt inflammation. For example, we have shown that human CRP inhibits the progression of experimental autoimmune encephalomyelitis (EAE) in CRP transgenic mice by shifting CD4+ T cells away from the TH 1 and toward the TH 2 subset. Notably, this action required the inhibitory Fcγ receptor IIB (FcγRIIB), but did not require high levels of human CRP...
2018: Frontiers in Immunology
Jeremy T Ritzert, Wyndham W Lathem
Bacterial pathogenesis depends on changes in metabolic and virulence gene expression in response to changes within a pathogen's environment. The plague-causing pathogen, Yersinia pestis, requires expression of the gene encoding the Pla protease for progression of pneumonic plague. The catabolite repressor protein Crp, a global transcriptional regulator, may serve as the activator of pla in response to changes within the lungs as disease progresses. By using gene reporter fusions, the spatial and temporal activation of the crp and pla promoters was measured in a mouse model of pneumonic plague...
March 19, 2018: Journal of Bacteriology
Jin Qu, Xin Zhao, Peter X Ma, Baolin Guo
Injectable hydrogels with multistimuli responsiveness to electrical field and pH as a drug delivery system have been rarely reported. Herein, we developed a series of injectable conductive hydrogels as "smart" drug carrier with the properties of electro-responsiveness, pH-sensitivity, and inherent antibacterial activity. The hydrogels were prepared by mixing chitosan-graft-polyaniline (CP) copolymer and oxidized dextran (OD) as a cross-linker. The chemical structures, morphologies, electrochemical property, swelling ratio, conductivity, rheological property, in vitro and in vivo biodegradation, and gelation time of hydrogels were characterized...
March 16, 2018: Acta Biomaterialia
Sandeep Kumar Verma, Ashok Kumar Das, Manoj Kumar Patel, Ashish Shah, Vinay Kumar, Saikat Gantait
With the overwhelmingly rapid advancement in the field of nanotechnology, the engineered nanomaterials (ENMs) have been extensively used in various areas of the plant system, including quality improvement, growth and nutritional value enhancement, gene preservation etc. There are several recent reports on the ENMs' influence on growth enhancements, growth inhibition as well as certain toxic impacts on plant. However, translocation, growth responses and stress modulation mechanisms of ENMs in the plant systems call for better and in-depth understanding...
March 3, 2018: Science of the Total Environment
Ali Akgul, Ayfer Akgul, Mark L Lawrence, Attila Karsi
Edwardsiella ictaluri is a Gram-negative facultative anaerobic rod and the causative agent of enteric septicemia of channel catfish (ESC), which is one of the most prevalent diseases of catfish, causing significant economic losses in the catfish industry. E. ictaluri is resistant to complement system and macrophage killing, which results in rapid systemic septicemia. However, mechanisms of E. ictaluri stress responses under conditions of host environment are not studied well. Therefore, in this work, we report E...
2018: PloS One
Yukio Fujiwara, Yoichi Saito, Takuya Shiota, Pan Cheng, Tsuyoshi Ikeda, Koji Ohnishi, Motohiro Takeya, Yoshihiro Komohara
Recent progress in anti-tumor therapy has revealed the significance of anti-tumor immune responses in tumor progression and clinical course in several kinds of malignant tumors. The draining lymph node is an important immune system component that contains a number of antigen-presenting cells, which induce rapid immune responses to foreign antigens. Current studies have shown that higher expression of CD169 on lymph node sinus macrophages is associated with the induction of anti-tumor immunity. In the present study, we searched for natural compounds that regulate the CD169-positive phenotype in macrophages to identify potential new anti-cancer agents targeting macrophage activation...
2018: Journal of Clinical and Experimental Hematopathology: JCEH
M D Basson
The mucosal response to injury can best be understood as a complex layering of different responses that may be invoked depending upon the size and nature of the injury, the persistence of the injurious stimulus, and the availability of various trophic host factors that stimulate repair. There is a hierarchy of responses that ranges from small rapid resealing of acute apical membrane or single cell wounds through the long term attempt to heal a giant peptic ulcer or respond to inflammatory bowel disease. Although much previous attention has been paid to the local factors that regulate these pathways and responses, there is increasing interest in systemic factors that may act either by the production of cytokines and trophic factors or by the direct migration of bone marrow derived stem cells into the mucosal wound...
December 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
Fevzi F Yalniz, Mohammad H Murad, Stephanie J Lee, Steven Z Pavletic, Nandita Khera, Nilay D Shah, Shahrukh K Hashmi
Given the increasing incidence of cGVHD and its rapidly escalating costs due to many lines of drug treatments, we aimed to perform a meta-analysis to assess the comparative effectiveness of various treatment options. Using these results, we then conducted a cost effectiveness analysis (CEA) for the frequently utilized agents in SR-cGVHD. We searched for studies examining tacrolimus, sirolimus, rituximab, ruxolitinib, hydroxychloroquine, imatinib, bortezomib, ibrutinib, extracorporeal photopheresis (ECP), pomalidomide and methotrexate...
March 14, 2018: Biology of Blood and Marrow Transplantation
Mario Altamura, Salvatore Iuso, Angela Balzotti, Girolamo Francavilla, Andrea Dimitri, Giuseppe Cibelli, Antonello Bellomo, Annamaria Petito
Reported findings on reactivity to stress of the sympathetic-adreno-medullar (SAM) and hypothalamic-pituitary-adrenal (HPA) systems in panic disorder (PD) are very variable. This inconsistency may be explained by differences in treatment exposure, illness duration and emotion regulation strategies. The present study examined the reactivity to mental stress of the SAM and HPA axes in a sample of first episode, drug naïve patients with PD which avoids confounds of medications exposure and illness chronicity...
March 14, 2018: Neuroscience Research
Francesco Soria, Andrea I Beleni, David D'Andrea, Irene Resch, Kilian M Gust, Paolo Gontero, Shahrokh F Shariat
OBJECTIVES: A small subset of patients treated with immune checkpoint inhibitors manifest atypical patterns of response, the so-called pseudoprogression (PP) and hyperprogression (HP). Their prevalence in urothelial (UC) and renal cancer (RCC) remains, to date, mostly uninvestigated. Therefore, we aimed to provide a summary of the current knowledge about PP and HP during immune checkpoint inhibitor therapy in UC and RCC patients. METHODS AND MATERIALS: A systematic medline/pubmed© literature search was performed...
March 16, 2018: World Journal of Urology
Wei Ling Chua, Min Ting Alicia See, Helena Legido-Quigley, Daryl Jones, Augustine Tee, Sok Ying Liaw
No abstract text is available yet for this article.
March 14, 2018: International Journal for Quality in Health Care
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