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https://www.readbyqxmd.com/read/28344781/patient-specific-three-dimensional-explant-spheroids-derived-from-human-nasal-airway-epithelium-a-simple-methodological-approach-for-ex-vivo-studies-of-primary-ciliary-dyskinesia
#1
June Kehlet Marthin, Elizabeth Munkebjerg Stevens, Lars Allan Larsen, Søren Tvorup Christensen, Kim Gjerum Nielsen
BACKGROUND: Three-dimensional explant spheroid formation is an ex vivo technique previously used in studies of airway epithelial ion and water transport. Explanted cells and sheets of nasal epithelium form fully differentiated spheroids enclosing a partly fluid-filled lumen with the ciliated apical surface facing the outside and accessible for analysis of ciliary function. METHODS: We performed a two-group comparison study of ciliary beat pattern and ciliary beat frequency in spheroids derived from nasal airway epithelium in patients with primary ciliary dyskinesia (PCD) and in healthy controls...
2017: Cilia
https://www.readbyqxmd.com/read/28340556/innovative-substance-2250-as-a-highly-promising-anti-neoplastic-agent-in-malignant-pancreatic-carcinoma-in-vitro-and-in-vivo
#2
M Buchholz, B Majchrzak-Stiller, S Hahn, D Vangala, R W Pfirrmann, W Uhl, C Braumann, A M Chromik
BACKGROUND: Former studies already revealed the anti-neoplastic properties of the anti-infective agent Taurolidine (TRD) against many tumor species in vitro and in vivo. Its anti-proliferative and cell death inducing capacity is largely due to its main derivative Taurultam (TRLT). In this study it could be demonstrated, that substance 2250 - a newly defined innovative structural analogue of TRLT - exhibits an anti-neoplastic effect on malignant pancreatic carcinoma in vitro and in vivo...
March 24, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28334041/virus-mediated-suppression-of-host-non-self-recognition-facilitates-horizontal-transmission-of-heterologous-viruses
#3
Songsong Wu, Jiasen Cheng, Yanping Fu, Tao Chen, Daohong Jiang, Said A Ghabrial, Jiatao Xie
Non-self recognition is a common phenomenon among organisms; it often leads to innate immunity to prevent the invasion of parasites and maintain the genetic polymorphism of organisms. Fungal vegetative incompatibility is a type of non-self recognition which often induces programmed cell death (PCD) and restricts the spread of molecular parasites. It is not clearly known whether virus infection could attenuate non-self recognition among host individuals to facilitate its spread. Here, we report that a hypovirulence-associated mycoreovirus, named Sclerotinia sclerotiorum mycoreovirus 4 (SsMYRV4), could suppress host non-self recognition and facilitate horizontal transmission of heterologous viruses...
March 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28332589/cell-cycle-arrest-and-biochemical-changes-accompanying-cell-death-in-harmful-dinoflagellates-following-exposure-to-bacterial-algicide-iri-160aa
#4
Kaytee L Pokrzywinski, Charles L Tilney, Mark E Warner, Kathryn J Coyne
Bacteria may play a role in regulating harmful algal blooms, but little is known about the biochemical and physiological changes associated with cell death induced by algicidal bacteria. Previous work characterized an algicidal exudate (IRI-160AA) produced by Shewanella sp. IRI-160 that is effective against dinoflagellates, while having little to no effect on other phytoplankton species in laboratory culture experiments. The objective of this study was to evaluate biochemical changes associated with cell death and impacts on the cell cycle in three dinoflagellate species (Prorocentrum minimum, Karlodinium veneficum and Gyrodinium instriatum) after exposure to IRI-160AA...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28329693/lanthanide-integrated-supramolecular-polymeric-nanoassembly-with-multiple-regulation-characteristics-for-multidrug-resistant-cancer-therapy
#5
Weihong Jin, Qiwen Wang, Min Wu, Yang Li, Guping Tang, Yuan Ping, Paul K Chu
Cancer treatment can in principle be enhanced by the synergistic effects of chemo- and nucleic acid-based combination therapies but the lack of efficient drug nanocarriers and occurrence of multidrug resistance (MDR) are major obstacles adversely affecting the effectiveness. Herein, a lanthanide-integrated supramolecular polymeric nanoassembly that delivers anticancer drugs and siRNA for more effective cancer therapy is described. This nanotherapeutic system is prepared by loading adamantane-modified doxorubicin (Dox) into polyethylenimine-crosslinked-γ-cyclodextrin (PC) through the supramolecular assembly to form the interior Dox-loaded PC (PCD) followed by electrostatically driven self-assembly of siRNA and PCD to produce the PCD/siRNA nanocomplexes...
March 16, 2017: Biomaterials
https://www.readbyqxmd.com/read/28316353/cassava-postharvest-physiological-deterioration-a-complex-phenomenon-involving-calcium-signaling-reactive-oxygen-species-and-programmed-cell-death
#6
REVIEW
Astride S M Djabou, Luiz J C B Carvalho, Qing X Li, Nicolas Niemenak, Songbi Chen
Postharvest physiological deterioration (PPD) of cassava (Manihot esculenta) storage roots is a complex physiological and biochemical process which involve many regulatory networks linked with specific proteins modulation and signaling transduction pathways. However, it is poorly understood regarding biological regulation, and the interactions among protein groups and signals to determine PPD syndrome in cassava storage roots. This review sheds some light on the possible molecular mechanisms involved in reactive oxygen species (ROS), calcium signaling transduction, and programmed cell death (PCD) in cassava PPD syndrome...
2017: Acta Physiologiae Plantarum
https://www.readbyqxmd.com/read/28304236/increased-spontaneous-programmed-cell-death-is-associated-with-impaired-cytokine-secretion-in-peripheral-blood-mononuclear-cells-from-hepatitis-c-virus-positive-patients
#7
Abdulkarim Alhetheel, Ahmed Albarrag, Zahid Shakoor, Khalid Alswat, Ayman Abdo, Waleed Al-Hamoudi, Suliman Alomar
Peripheral blood mononuclear cells (PBMCs) play a critical role in clearing hepatitis C virus (HCV). PBMC defects have been linked with HCV infection; however, the underlying mechanisms remain obscure. We hypothesized that PBMCs of HCV-infected patients are more susceptible to programmed cell death (PCD), and are therefore unable to clear HCV. We compared spontaneous PBMC PCD and cytokine [interleukin (IL)-1, -6, -8, -10, and -12] secretion between untreated (naive) HCV(+) and treated [sustained responder (SR)] patients with HCV, and HCV(-) healthy controls...
March 17, 2017: Viral Immunology
https://www.readbyqxmd.com/read/28303955/differential-proteomic-analysis-by-itraq-reveals-the-mechanism-of-pyropia-haitanensis-responding-to-high-temperature-stress
#8
Jianzhi Shi, Yuting Chen, Yan Xu, Dehua Ji, Changsheng Chen, Chaotian Xie
Global warming increases sea temperature and leads to high temperature stress, which affects the yield and quality of Pyropia haitanensis. To understand the molecular mechanisms underlying high temperature stress in a high temperature tolerance strain Z-61, the iTRAQ technique was employed to reveal the global proteomic response of Z-61 under different durations of high temperature stress. We identified 151 differentially expressed proteins and classified them into 11 functional categories. The 4 major categories of these are protein synthesis and degradation, photosynthesis, defense response, and energy and carbohydrate metabolism...
March 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28292517/a-liquid-chromatography-mass-spectrometry-method-based-on-post-column-derivatization-for-automated-analysis-of-urinary-hexanal-and-heptanal
#9
Di Chen, Jun Ding, Ming-Ke Wu, Tian-Yi Zhang, Chu-Bo Qi, Yu-Qi Feng
A fully automated in-tube solid phase microextraction/liquid chromatography-post column derivatization-mass spectrometry (in-tube SPME/LC-PCD-MS) method was developed for the analysis of urinary hexanal and heptanal. Online in-tube SPME enabled effective enrichment of the low level aldehydes and elimination of matrix interferences. PCD could be simply realized by mixing the LC elute and hydroxylamine hydrochloride (HAHC) solution with just a tee. The peak broadening and loss in separation efficiency associated with post column dead-volume could be ignored and even completely eliminated by employing suitable PCD configuration...
March 1, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28290230/cilia-and-ear
#10
Gioia Piatti, Maria Margherita De Santi, Sara Torretta, Lorenzo Pignataro, Daniela Soi, Umberto Ambrosetti
OBJECTIVE: To investigate the prevalence of otological complications derived from primary ciliary dyskinesia (PCD) in adulthood. METHODS: Twenty-three patients with diagnosed PCD underwent medical history aimed at recording the presence of ear, nose, and throat manifestations (ENT) and any surgical treatments. The ENT objectivity was annotated, and then patients were subjected to audiometric test, tympanometry, registration of otoacoustic emission, and vestibular evaluation...
April 2017: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/28289990/dual-contrast-agent-photon-counting-computed-tomography-of-the-heart-initial-experience
#11
Rolf Symons, Tyler E Cork, Manu N Lakshmanan, Robert Evers, Cynthia Davies-Venn, Kelly A Rice, Marvin L Thomas, Chia-Ying Liu, Steffen Kappler, Stefan Ulzheimer, Veit Sandfort, David A Bluemke, Amir Pourmorteza
To determine the feasibility of dual-contrast agent imaging of the heart using photon-counting detector (PCD) computed tomography (CT) to simultaneously assess both first-pass and late enhancement of the myocardium. An occlusion-reperfusion canine model of myocardial infarction was used. Gadolinium-based contrast was injected 10 min prior to PCD CT. Iodinated contrast was infused immediately prior to PCD CT, thus capturing late gadolinium enhancement as well as first-pass iodine enhancement. Gadolinium and iodine maps were calculated using a linear material decomposition technique and compared to single-energy (conventional) images...
March 13, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28289722/assessment-of-ciliary-phenotype-in-primary-ciliary-dyskinesia-by-micro-optical-coherence-tomography
#12
George M Solomon, Richard Francis, Kengyeh K Chu, Susan E Birket, George Gabriel, John E Trombley, Kristi L Lemke, Nikolai Klena, Brett Turner, Guillermo J Tearney, Cecilia W Lo, Steven M Rowe
Ciliary motion defects cause defective mucociliary transport (MCT) in primary ciliary dyskinesia (PCD). Current diagnostic tests do not assess how MCT is affected by perturbation of ciliary motion. In this study, we sought to use micro-optical coherence tomography (μOCT) to delineate the mechanistic basis of cilia motion defects of PCD genes by functional categorization of cilia motion. Tracheae from three PCD mouse models were analyzed using μOCT to characterize ciliary motion and measure MCT. We developed multiple measures of ciliary activity, integrated these measures, and quantified dyskinesia by the angular range of the cilia effective stroke (ARC)...
March 9, 2017: JCI Insight
https://www.readbyqxmd.com/read/28287569/self-assembling-morphologies-obtained-from-helical-polycarbodiimide-copolymers-and-their-triazole-derivatives
#13
Oleg V Kulikov, Dumindika A Siriwardane, Gregory T McCandless, Samsuddin F Mahmood, Bruce M Novak
A facile method for the preparation of polycarbodiimide-based secondary structures (e.g., nano-rings, "craters," fibers, looped fibers, fibrous networks, ribbons, worm-like aggregates, toroidal structures, and spherical particles) is described. These aggregates are morphologically influenced by extensive hydrophobic side chain-side chain interactions of the singular polycarbodiimide strands, as inferred by atomic force microscopy (AFM) and scanning electron microscopy (SEM) techniques. Polycarbodiimide-g-polystyrene copolymers (PS-PCDs) were prepared by a combination of synthetic methods, including coordination-insertion polymerization, copper(I)-catalyzed azide alkyne cycloaddition (CuAAC) "click" chemistry, and atom transfer radical polymerization (ATRP)...
February 7, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28286514/ethylene-improves-root-system-development-under-cadmium-stress-by-modulating-superoxide-anion-concentration-in-arabidopsis-thaliana
#14
Ann Abozeid, Zuojia Ying, Yingchao Lin, Jia Liu, Zhonghua Zhang, Zhonghua Tang
This work aims at identifying the effects of ethylene on the response of Arabidopsis thaliana root system to cadmium chloride (CdCl2) stress. Two ethylene-insensitive mutants, ein2-5 and ein3-1eil1-1, were subjected to (25, 50, 75, and 100 μM) CdCl2 concentrations, from which 75 μM concentration decreased root growth by 40% compared with wild type Col-0 as a control. Ethylene biosynthesis increased in response to CdCl2 treatment. The length of primary root and root tip in ein2-5 and ein3-1eil1-1 decreased compared with wild type after CdCl2 treatment, suggesting that ethylene play a role in root system response to Cd stress...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28284321/matrix-metalloproteinases-and-airway-remodeling-and-function-in-primary-ciliary-dyskinesia
#15
Massimo Pifferi, Andrew Bush, Davide Caramella, Maria Rita Metelli, Maria Di Cicco, Martina Piras, Giulia Gherarducci, Carlo Capristo, Fabrizio Maggi, Diego Peroni, Attilio L Boner
BACKGROUND: The balance between matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs) is important in the regulation of airway damage. OBJECTIVE: To evaluate whether they are important in the pathophysiology of primary and secondary ciliary dyskinesia (PCD, SCD). METHODS: We measured sputum bacteriology, lung CT changes, MMPs, TIMPs and lung function in 86 patients (51 PCD, 35 SCD) in a cross-sectional study; the 10 controls studied did not have HRCT or sputum cultures...
March 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/28282070/-rational-use-of-psychotropic-medications-and-sedative-load-in-older-adults-with-and-without-dementia
#16
María L Rattagan, Darío Lisei, Galeno J Rojas, Gabriel G Persi, Virginia L Parisi, Martín López Vicchi, Gustavo Da Prat de Magalhaes, María Bres Bullrich, Emilia M Gatto
Sedative drugs use has been associated with more cognitive impairment and increased mortality. Sedative load refers to cumulative exposure to multiple drugs with sedative properties. OBJECTIVE: Describe the use of psychotropic drugs and sedative load in older adults with and without dementia. MATERIAL AND METHODS: We conducted a cross-sectional study from 2014-2015 (Sanatorio Trinidad Mitre), in hospitalized patients older than 65 years old. Drugs were classified according to the WHO ATC system...
September 2016: Vertex: Revista Argentina de Psiquiatriá
https://www.readbyqxmd.com/read/28273904/methionine-aminopeptidase-2-is-a-key-regulator-of-apoptotic-like-cell-death-in-leishmania-donovani
#17
Ritesh Kumar, Kartikeya Tiwari, Vikash Kumar Dubey
We investigate the role of methionine aminopeptidase 2 (MAP2) in miltefosine induced programmed cell death (PCD) in promastigote form of L. donovani. We report that TNP-470, an inhibitor of MAP2, inhibits programmed cell death in miltefosine treated promastigotes. It inhibits the biochemical features of metazoan apoptosis, including caspase3/7 protease like activity, oligonucleosomal DNA fragmentation, collapse of mitochondrial transmembrane potential, and increase in cytosolic pool of calcium ions but did not prevent the cell death and phosphatidyl serine externalization...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/28273898/disinfection-of-multidrug-resistant-escherichia-coli-by-solar-photocatalysis-using-fe-doped-zno-nanoparticles
#18
Sourav Das, Sayantan Sinha, Bhaskar Das, R Jayabalan, Mrutyunjay Suar, Amrita Mishra, Ashok J Tamhankar, Cecilia Stålsby Lundborg, Suraj K Tripathy
Spread of antibiotic resistant bacteria through water, is a threat to global public health. Here, we report Fe-doped ZnO nanoparticles (Fe/ZnO NPs) based solar-photocatalytic disinfection (PCD) of multidrug resistant Escherichia coli (MDR E. coli). Fe/ZnO NPs were synthesized by chemical precipitation technique, and when used as photocatalyst for disinfection, proved to be more effective (time for complete disinfection = 90 min) than ZnO (150 min) and TiO2 (180 min). Lipid peroxidation and potassium (K(+)) ion leakage studies indicated compromisation of bacterial cell membrane and electron microscopy and live-dead staining confirmed the detrimental effects on membrane integrity...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/28264678/passive-case-detection-of-malaria-in-ratanakiri-province-cambodia-to-detect-villages-at-higher-risk-for-malaria
#19
Somony Heng, Lies Durnez, Sokny Mao, Sovannaroth Siv, Sochantha Tho, Vanna Mean, Vincent Sluydts, Marc Coosemans
BACKGROUND: Cambodia reduced malaria incidence by more than 75% between 2000 and 2015, a target of the Millennium Development Goal 6. The Cambodian Government aims to eliminate all forms of malaria by 2025. The country's malaria incidence is highly variable at provincial level, but less is known at village level. This study used passive case detection (PCD) data at village level in Ratanakiri Province from 2010 to 2014 to describe incidence trends and identify high-risk areas of malaria to be primarily targeted towards malaria elimination...
March 6, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28263777/necroptosis-modules-and-molecular-switches-with-therapeutic-implications
#20
REVIEW
Deepika Arora, Pradeep Kumar Sharma, Mohammed Haris Siddiqui, Yogeshwer Shukla
Among the various programmed cell death (PCD) pathways, "Necroptosis" has gained much importance as a novel paradigm of cell death. This pathway has emerged as a backup mechanism when physiologically conserved PCD (apoptosis) is non-functional either genetically or pathogenically. The expanding spectrum of necroptosis from physiological development to diverse patho-physiological disorders, including xenobiotics-mediated toxicity has now grabbed the attention worldwide. The efficient role of necroptosis regulators in disease development and management are under constant examination...
March 2, 2017: Biochimie
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